/*
 * FreeRTOS memory safety proofs with CBMC.
 * Copyright (C) 2022 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * http://aws.amazon.com/freertos
 * http://www.FreeRTOS.org
 */

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "queue.h"

/* FreeRTOS+TCP includes. */
#include "FreeRTOS_IP.h"
#include "FreeRTOS_IP_Private.h"
#include "FreeRTOS_ND.h"

/* CBMC includes. */
#include "../../utility/memory_assignments.c"
#include "cbmc.h"

void harness()
{
    NetworkInterface_t * pxNetworkInterface = safeMalloc( sizeof( NetworkInterface_t ) );
    uint8_t * pcNetworkBuffer = safeMalloc( sizeof( ProtocolPacket_t ) + 4 );
    ProtocolPacket_t * pxProtocolPacket;

    __CPROVER_assume( pcNetworkBuffer != NULL );

    pxProtocolPacket = ( ProtocolPacket_t * ) ( ( uintptr_t ) ( pcNetworkBuffer ) + 2U );
    __CPROVER_assume( pxProtocolPacket != NULL );

    /* For this proof, its assumed that the endpoints and interfaces are correctly
     * initialised and the pointers are set correctly. */

    pxNetworkEndPoints = ( NetworkEndPoint_t * ) safeMalloc( sizeof( NetworkEndPoint_t ) );
    __CPROVER_assume( pxNetworkEndPoints != NULL );

    /* Interface init. */
    pxNetworkEndPoints->pxNetworkInterface = pxNetworkInterface;
    __CPROVER_assume( pxNetworkEndPoints->pxNetworkInterface != NULL );

    if( nondet_bool() )
    {
        pxNetworkEndPoints->pxNext = ( NetworkEndPoint_t * ) safeMalloc( sizeof( NetworkEndPoint_t ) );
        __CPROVER_assume( pxNetworkEndPoints->pxNext != NULL );
        pxNetworkEndPoints->pxNext->pxNext = NULL;
        pxNetworkEndPoints->pxNext->pxNetworkInterface = pxNetworkEndPoints->pxNetworkInterface;
    }
    else
    {
        pxNetworkEndPoints->pxNext = NULL;
    }

    FreeRTOS_MatchingEndpoint( pxNetworkInterface, ( const uint8_t * ) ( pxProtocolPacket ) );
}