/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation 
 * 
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 * 
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** NetX Component                                                        */
/**                                                                       */
/**   Transmission Control Protocol (TCP)                                 */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#define NX_SOURCE_CODE


/* Include necessary system files.  */

#include "nx_api.h"
#include "nx_tcp.h"

/* Bring in externs for caller checking code.  */
NX_CALLER_CHECKING_EXTERNS


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _nxe_tcp_socket_window_update_notify_set            PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Yuxin Zhou, Microsoft Corporation                                   */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks for errors in the TCP socket window update     */
/*    notify set call.                                                    */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    socket_ptr                            Pointer to TCP socket         */
/*    tcp_window_udpate_notify              Routine to call when NetX     */
/*                                            receives a window update    */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Completion status             */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _nx_tcp_socket_window_update_notify_set                             */
/*                                          Acutal notify set routine.    */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/*  RELEASE HISTORY                                                       */
/*                                                                        */
/*    DATE              NAME                      DESCRIPTION             */
/*                                                                        */
/*  05-19-2020     Yuxin Zhou               Initial Version 6.0           */
/*  09-30-2020     Yuxin Zhou               Modified comment(s),          */
/*                                            resulting in version 6.1    */
/*                                                                        */
/**************************************************************************/
UINT  _nxe_tcp_socket_window_update_notify_set(NX_TCP_SOCKET *socket_ptr,
                                               VOID (*tcp_socket_window_update_notify)(NX_TCP_SOCKET *socket_ptr))
{

    /* Check for invalid input pointers.  */
    if ((socket_ptr == NX_NULL) || (socket_ptr -> nx_tcp_socket_id != NX_TCP_ID))
    {
        return(NX_PTR_ERROR);
    }

    /* Check for invalid input pointers.  */
    if (tcp_socket_window_update_notify == NX_NULL)
    {
        return(NX_PTR_ERROR);
    }

    /* Check to see if TCP is enabled.  */
    if (!(socket_ptr -> nx_tcp_socket_ip_ptr) -> nx_ip_tcp_packet_receive)
    {
        return(NX_NOT_ENABLED);
    }

    /* Check for appropriate caller.  */
    NX_INIT_AND_THREADS_CALLER_CHECKING

    return(_nx_tcp_socket_window_update_notify_set(socket_ptr, tcp_socket_window_update_notify));
}