/*

    File:       EnableIPReuseAddrSample.c

    Contains:   

    Written by: Rich Kubota 

    Copyright:  © Copyright 2001 Apple Computer, Inc. All rights reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

                        ("Apple") in consideration of your agreement to the following terms, and your

                        use, installation, modification or redistribution of this Apple software

                        constitutes acceptance of these terms.  If you do not agree with these terms,

                        please do not use, install, modify or redistribute this Apple software.

                        In consideration of your agreement to abide by the following terms, and subject

                        to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs

                        copyrights in this original Apple software (the "Apple Software"), to use,

                        reproduce, modify and redistribute the Apple Software, with or without

                        modifications, in source and/or binary forms; provided that if you redistribute

                        the Apple Software in its entirety and without modifications, you must retain

                        this notice and the following text and disclaimers in all such redistributions of

                        the Apple Software.  Neither the name, trademarks, service marks or logos of

                        Apple Computer, Inc. may be used to endorse or promote products derived from the

                        Apple Software without specific prior written permission from Apple.  Except as

                        expressly stated in this notice, no other rights or licenses, express or implied,

                        are granted by Apple herein, including but not limited to any patent rights that

                        may be infringed by your derivative works or by other works in which the Apple

                        Software may be incorporated.

                        The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

                        WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

                        WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

                        PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

                        COMBINATION WITH YOUR PRODUCTS.

                        IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

                        CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

                        GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

                        ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION

                        OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT

                        (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN

                        ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    Change History (most recent first):

                2/12/2001       MK  Carbonized and updated to CodeWarrior 6.0

                7/23/1999   Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1

*/

#include <Carbon.h>

OSStatus DoNegotiateIPReuseAddrOption(EndpointRef ep, Boolean enableReuseIPMode);

/* Input: ep - endpointref on which to negotiate the option

            enableReuseIPMode - desired option setting - true/false

   Return: kOTNoError indicates that the option was successfully negotiated

            OSStatus is an error if < 0, otherwise, the status field is

            returned and is > 0.

    IMPORTANT NOTE: The endpoint is assumed to be in synchronous more, otherwise

            this code will not function as desired

*/

OSStatus DoNegotiateIPReuseAddrOption(EndpointRef ep, Boolean enableReuseIPMode)

{

    UInt8       buf[kOTFourByteOptionSize]; // define buffer for fourByte Option size

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

    TOptMgmt    req;

    TOptMgmt    ret;

    OSStatus    err;

    if (!OTIsSynchronous(ep))

    {

        return (-1);

    }

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

    req.opt.buf = buf;

    req.opt.len = sizeof(buf);

    req.flags   = T_NEGOTIATE;              // negotiate for option

    ret.opt.buf = buf;

    ret.opt.maxlen = kOTFourByteOptionSize;

    opt->level  = INET_IP;                  // dealing with an IP Level function

    opt->name   = kIP_REUSEADDR;

    opt->len    = kOTFourByteOptionSize;

    opt->status = 0;

    *(UInt32*)opt->value = enableReuseIPMode;       // set the desired option level, true or false

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

        // 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;

}