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From: rmitchel@bbn.com (Rob Mitchell)
Newsgroups: comp.sys.mac.comm
Subject: Think C and IM-V Preferred AppleTalk Interface calls
Keywords: AppleTalk Think C ATP
Message-ID: <62106@bbn.BBN.COM>
Date: 15 Jan 91 21:59:26 GMT
Sender: news@bbn.com
Distribution: comp
Lines: 63

SUBJ: AppleTalk ATP/NBP calls in Think C

    Below are just a few questions/issues concerning Inside Macintosh
Volume 5 and Think C implementation of Preferred AppleTalk Interface
calls.  Looks like there's more than meets the eye here:


        [1] How do you send ATP messages in Exactly-Once (XO) or
            At-Least-Once (ALO) transaction mode?  In IM-V, the
            Preferred AppleTalk Interface has parameter blocks for
            ATP calls which are much different from the Alternate
            AppleTalk Interface in IM-II.

        [2] Has anyone defined the parameters the Preferred AppleTalk 
            Interface uses into pseudo-code or some kind of interface 
            spec.???  If so, we are in desperate need for it and would 
            greatly appreciate if you could pass it on.

        [3] Do AppleTalk Parameter Blocks have to be allocated as
            pointers or can you create something like:

            typedef MPPPBptr      *MPPHandle;
            MPPHandle             mppPbHndl;
            OSErr                 theErr;
            EntityName            enArray [10] = { ... };                

            for (i=0 ; i<=NUM_NVE ; i++)
            {
                mppPbHndl = (MPPHandle) NewHandle (sizeof (MPPParamBlock));
                (*mppPbHndl)->MPPentityPtr = (Ptr)&enArray[i];
                (*mppPbHndl)->ioCompletion = NULL;
                theErr = PRegisterName ((*mppPbHndl), TRUE);
                DisposHandle (mppPbHndl);
            }


       [4] I tried the above and it doesn't seem to work.  I'm not sure
           if the AppleTalk Drivers (.MPP, .ATP, .XPP) actually use the
           pointer passed to it or if they "alloc" there own storage.
           If I use unpurgable or immovable memory, then I must keep track
           of each and every protocol message requested and responded...
           RIGHT???




       Thanks in advance for your opinion!!  If anyone has some sample code
using the Preferred AppleTalk Interface calls, I'd greatly appreciate it.



Rob Mitchell
BBN Systems & Technologies
rmitchel@vax.bbn.com
(617) 873 - 4041

These opinions are mine and mine only.  They do not represent BBNs' opinions.
Rob Mitchell
BBN Systems & Technologies
rmitchel@vax.bbn.com
(617) 873 - 4041

These opinions are mine and mine only.  They do not represent BBNs' opinions.