/*

    File: EnableSelfSendSample.c

    By:     Rich Kubota

            Developer Technical Support

    Purpose: Demonstrate the use of the OTOptionManagement call to tell an AppleTalk

            endpoint to enable/disable the SelfSend option.

    change history:

            9/14/98 rrk Modified check for asynch mode. Return err -1, instead of using 

                classic AppleTalk SelfSend call.

                Note that this sample does not support asynch endpoints.  To support

                an asynch endpoint, the same call to OTOptionManagement would happen

                however, the endpoint handler will be called with the

                T_OPTMGMTCOMPLETE event.  The handler would then inspect the cookie, 

                which will be the TOptMgmt "ret" value to check for the

                success or failure of the call.

            1/25/98 rrk Changed the original use of the OTOptionManagement call, OPT_SELFSEND

                which only enables selfsend from the endpoint to other AppleTalk services when

                broadcast messages are sent from the endpoint.  The desired behavior is one 

                where if other AppleTalk clients on the node send broadcast messages, that they

                are also sent to the endpoint.  To this end, there is the ATALK_IOC_FULLSELFSEND

                Ioct, which must be sent to the DDP endpoint.

                Note that the ATALK_IOC_FULLSELFSEND is desired to respond similarly to the 

                PSetSelfSend function.  If the result is not negative, then the following responses

                can be expected.

                0 - FullSelfSend was previously off

                1 - FullSelfSend was previously on

                Input parameters

                ep - the AppleTalk EndpointRef on which to enable fullSelfSend. You can pass

                any AppleTalk endpoint, DDP or above, to this function.

                enableSelfSend - a long word of the desired setting.

                Return result

                < 0 - error

                0 - FullSelfSend was previously off

                1 - FullSelfSend was previously on

                Note that if the use of the Ioctl returns an error < 0, then the PBSetSelfSend

                function is called.

                Note: As with the PSetSelfSend call, the Ioctl call affects AppleTalk globally.

                If you enable this feature, it is recommended that you not disable the feature

                when the process quits.  The user may launch another process which enables 

                selfsend.  Turning off selfsend in this case, affects the other process, as well.

*/

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

#include "OpenTptAppletalk.h"

extern OSStatus DoNegotiateSelfSendOption(EndpointRef ep, long enableSelfSend);

/*

    Sample function to enable/disable the SelfSend option for 

    an AppleTalk endpoint. 

    Input

    EndpointRef ep - endpoint on which to set SelfSend option on

    long enableSelfSend - 1L - option on, 0L - option off

   Return: 0 or 1 - previous state of self send

           -1 - asynch endpoints are not supported 

           other negative result - error calling OTIoctl

*/

OSStatus DoNegotiateSelfSendOption(EndpointRef ep, long enableSelfSend)

{

    OSStatus        result;

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

    {

        DebugStr("\pThis routine does not support asynch endpoints");

        return (OSStatus)-1;

    }

    result = OTIoctl(ep, ATALK_IOC_FULLSELFSEND, (void*)enableSelfSend);

    return result;

}