/*

    File:       SetServerStatusOption.c

    Contains:   

    Written by:     

    Copyright:  Copyright © 1999 by Apple Computer, Inc., All Rights Reserved.

                You may incorporate this Apple sample source code into your program(s) without

                restriction. This Apple sample source code has been provided "AS IS" and the

                responsibility for its operation is yours. You are not permitted to redistribute

                this Apple sample source code as "Apple sample source code" after having made

                changes. If you're going to re-distribute the source, we require that you make

                it clear in the source that the code was descended from Apple sample source

                code, but that you've made changes.

    Change History (most recent first):

                7/22/1999   Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1

*/

#include "OpenTransport.h"          // open transport files         

#include "OpenTptAppleTalk.h"

#include <Memory.h>

/*

**  prototype declaration

*/

extern OSStatus DoSetServerStatusOption(EndpointRef ep, char *statusStr);

/*

    global variables

    The nature of the following call is such that you'll want to set the option 

    when the endpoint is in asynch mode.  To handle the asynch case, you must

    declare the global gOptionCompleted.  When an option management call is made

    gOptionCompleted is set to zero.  When the T_OPTMGMTCOMPLETE call is handled

    by the endpoint handler, then gOptionCompleted is set to 1.  Note that the

    sample spin loops until gOptionCompleted is non-zero.  As such, the 

    DoSetServerStatusOption call cannot be made at interrupt time or from a deferred

    task.  The DoSetServerStatusOption can only be made at system task time.

    Ensure that gOptionCompleted is used to flag only one outstanding Option 

    Management call at a time.

*/

extern UInt32   gOptionCompleted;

/*

    input parameters

    ep - endpoint on which to set the status string option

    statusstr - C style string of the status string to set

    function result - kOTNoError indicates that the option was successfully negotiated

        if the result is negative, then this is the result returned by the call to

        OTOptionManagement.  If the result is positive, then this is the value of 

        the status field on return from the call to 

*/

OSStatus DoSetServerStatusOption(EndpointRef ep, char *statusStr)

{

    UInt8       buf[kOTOptionHeaderSize+256];   // define buffer to allow for 

                                                // up to a 256 char string

    TOption*    opt;                            // option ptr to make items easier to access

    TOptMgmt    req;

    TOptMgmt    ret;

    UInt32      statusStrLen;

    OSStatus    err;

    Boolean     isAsync = false;

    if (OTIsSynchronous(ep) == false)           // check whether ep sync or not

    {

        isAsync = true;

        gOptionCompleted = 0;

    }

    statusStrLen = OTStrLength(statusStr);  // get the length of the C string       

    opt = (TOption*)buf;                    // set option ptr to buffer

    req.opt.buf = buf;

    req.opt.len = kOTOptionHeaderSize + statusStrLen;

    req.flags   = T_NEGOTIATE;              // negotiate for serverstatus option

    ret.opt.buf = buf;

    ret.opt.maxlen = kOTOptionHeaderSize+256;

    opt->level  = ATK_PAP;                  // dealing with tpi

    opt->name   = OPT_SERVERSTATUS;

    opt->len    = kOTOptionHeaderSize + statusStrLen;

    opt->status = 0;

        // set the serverStr into the value field

    BlockMove(statusStr, (Ptr)&opt->value, statusStrLen);

    err = OTOptionManagement(ep, &req, &ret);

    if ((isAsync == true) && (err == kOTNoError))

    {

        while (gOptionCompleted == 0)

        {

            // spin in this null loop waiting for the option call to complete.

        }

    }

        // if no error then return the option status value

    if (err == kOTNoError)

    {

        if (opt->status != T_SUCCESS)

            err = opt->status;

        else

            err = kOTNoError;

    }

    return err;

}