LAPWrite

Send a frame to another node

#include <AppleTalk.h> AppleTalk Manager

OSErr LAPWrite( abRecord, async);

ATLAPRecHandle abRecord; handle to an ATLAPRec

Boolean async; 0=await completion; 1=immediate return

returns Error Code; 0=no error

LAPWrite is part of the AppleTalk alternate interface. It is recommended

that you use the preferred call, PWriteLAP instead.

LAPWrite sends a frame to another node.

abRecord is a handle to an ATLAPRec structure. The relevant fields are as

follows:

¨ abOpcode ABCallType 1 0 Always tLAPWrite

¨ abResult short 2 2 Result code

Æ abUserReference long 2 4 For your use

Æ lapAddress.dstNodeID char 1 8 Destination node ID

Æ lapAddress.lapProtType ABByte 1 10 ALAP protocol type

Æ lapReqCount short 2 12 Length of frame data

Æ lapDataPtr Ptr 4 16 Pointer to buffer

async is a Boolean value. Use FALSE for normal ( synchronous) operation

or TRUE to enqueue the request and resume control immediately. See

Async I/O.

Returns: an operating system Error Code. It will be one of:

noErr (0) No error

ddpLenErr (-92) ALAP data length too big

lapProtErr (-94) Invalid ALAP protocol type

excessCollsns (-95) Unable to contact destination node; packet not sent

Notes: LAPReqCount and lapDataPtr specify the length and location of the data to

send. The lapAddress.lapProtType field indicates the ALAP protocol type of

the frame and the lapAddress.dstNodeID indicates the node ID of the node to

which the frame should be sent.

The first two bytes of an ALAP frame's data must contain the length in

bytes of that data, including the length bytes themselves.

Referenced by (9):