/*
 * 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
 */

/* Standard includes. */
#include <stdint.h>
#include <stdio.h>

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

/* FreeRTOS+TCP includes. */
#include "FreeRTOS_IP.h"
#include "FreeRTOS_IPv4_Sockets.h"

/* CBMC includes. */
#include "cbmc.h"

void harness()
{
    NetworkBufferDescriptor_t * pxNetworkBuffer = safeMalloc( sizeof( NetworkBufferDescriptor_t ) );
    uint8_t * pxEthBuffer = safeMalloc( ipTOTAL_ETHERNET_FRAME_SIZE + ipIP_TYPE_OFFSET );
    struct freertos_sockaddr * pxSourceAddress = safeMalloc( sizeof( struct freertos_sockaddr ) );

    /* Network buffer is checked in FreeRTOS_recvfrom. */
    __CPROVER_assume( pxNetworkBuffer != NULL );

    /* Ethernet buffer is checked in xProcessReceivedUDPPacket_IPv6 before adding to the list. */
    __CPROVER_assume( pxEthBuffer != NULL );

    /* Points to ethernet buffer offset by ipIP_TYPE_OFFSET, this make sure the buffer allocation is similar
     * to the pxGetNetworkBufferWithDescriptor */
    pxNetworkBuffer->pucEthernetBuffer = &( pxEthBuffer[ ipIP_TYPE_OFFSET ] );

    /* Randomize address as input for different scenarios. */
    __CPROVER_havoc_object( pxSourceAddress );

    xRecv_Update_IPv4( pxNetworkBuffer, pxSourceAddress );
}