HP SNA APPC/LU6.2 Programming Inteface for OpenVMS

HP SNA APPC/LU6.2 Programming SPD 26.88.12
Interface for OpenVMS, Version 2.6
problem rather than having to learn about the underly-
ing communications medium. Because the APPC prod-
uct performs all the SNA functions on the user’s behalf,
users are not required to have a knowledge of SNA.
The verbs comprising the APPC product are defined to
make the individual subroutine calls correspond to the
verbs defined in the IBM manual, SNA Transaction Pro-
grammers Reference Manual for Logical Unit 6.2. This
makes it easier for IBM application-level programmers
to code OpenVMS LU6.2 programs.
The APPC product implements both the basic and
mapped conversation verb set using the same proce-
dure calls. The OpenVMS programmer may choose
which type of conversation is desired by specifying the
appropriate symbolic code in the TYPE parameter of the
SNALU62$ALLOCATE procedure.
Both sets of verbs can be synchronous or asyn-
chronous. Asynchronous completion of verbs allows for
multithreaded applications to use the LU6.2 interface
without blockage.
The following sections describe the supported and un-
supported verbs.
Supported Verbs
The following basic conversation verbs are supported:
• Allocate
• Confirm
• Confirmed
• Deallocate
• Flush
• Get_attributes
• Get_type[B
• Post_on_receipt
• Prepare_to_receive
• Receive_and_wait
• Receive_immediate
• Request_to_send
• Send_data
• Send_error
• Wait
The following mapped conversation verbs are sup-
ported:
• Get_type
• MC_Allocate
• MC_Confirm
• MC_Confirmed
• MC_Deallocate
• MC_Flush
• MC_Get_attributes
• MC_Post_on_receipt
• MC_Prepare_to_receive
• MC_Receive_immediate
• MC_Receive_and_wait
• MC_Request_to_send
• MC_Send_data
• MC_Send_error
• MC_Wait
The following control operator verbs are supported:
• Activate_session
• Deactivate_session
•Define_remote
•Define_tp
• Delete
Refer to the APPC product documentation for complete
descriptions of the use of these verbs.
Unsupported Verbs
The following basic conversation verbs are not sup-
ported:
• Backout
• Syncpt
• Test
The following mapped conversation verbs are not sup-
ported:
• Backout
• Syncpt
• MC_Test
The APPC product supports single sessions only; par-
allel sessions are not supported. The following control
operator verbs are not needed:
• Change_session_limit
•Define_local_lu
•Define_mode
• Display_local_lu
• Display_mode
• Display_remote_lu
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