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Inside Macintosh: Networking /

Chapter 10 - Link-Access Protocol (LAP) Manager / LAP Manager Reference

Routines

This section describes the LAP Manager's Pascal interface to the AppleTalk Transition Queue that allows you to place an entry for your application in the queue so that you will be notified when an AppleTalk transition occurs.

The Pascal interface to the AppleTalk Transition Queue consists of four routines:

• The LAPAddATQ function adds an entry to the AppleTalk Transition Queue.
• The LAPRmvATQ function removes an entry from the AppleTalk Transition Queue.
• The ATEvent procedure calls all the entries in the AppleTalk Transition Queue with an AppleTalk transition event code that you specify.
• The ATPreFlightEvent function calls all the entries in the AppleTalk Transition Queue with an AppleTalk transition event code that you specify in the event parameter. If any routine returns a nonzero function result, the LAP Manager calls all of the entries with the transition event code that you specify in ATPreFlightEvent function's cancel parameter.

This section also describes the LAP Manager's assembly-language interface that allows you to install and remove your own protocol handler for a specific IEEE 802.2 protocol type. You can write a protocol handler application that reads 802.2 Type 1 data packets, and you can install your application as a client of the LAP Manager.

The assembly-language routines that allow you to attach and detach protocol handlers for 802.2 Type 1 data packets are

• the L802Attach routine, which installs your protocol handler for a specific IEEE 802.2 protocol type
• the L802Detach routine, which detaches from the LAP Manager your protocol handler for a specific IEEE 802.2 protocol type

Note

The ANSI/IEEE standards for the 802 protocols
are published by the IEEE.

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Subtopics

Adding and Removing AppleTalk Transition Queue Entries

Notifying Routines When Your Application-Defined Transition Occurs

Attaching and Detaching 802.2 Protocol Handlers