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103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/* Standard includes. */
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#include <stdint.h>
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/* FreeRTOS includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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#include "queue.h"
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#include "list.h"
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#include "semphr.h"
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/* FreeRTOS+TCP includes. */
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#include "FreeRTOS_IP.h"
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#include "FreeRTOS_Sockets.h"
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#include "FreeRTOS_IP_Private.h"
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#include "FreeRTOS_UDP_IP.h"
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#include "FreeRTOS_DNS.h"
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#include "NetworkBufferManagement.h"
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#include "NetworkInterface.h"
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#include "IPTraceMacroDefaults.h"
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#include "cbmc.h"
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/****************************************************************
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* Signature of function under test
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****************************************************************/
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size_t prvReadNameField( const uint8_t *pucByte,
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size_t uxRemainingBytes,
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char *pcName,
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size_t uxDestLen );
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/****************************************************************
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* The function under test is not defined in all configurations
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****************************************************************/
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#if ( ipconfigUSE_DNS_CACHE == 1 ) || ( ipconfigDNS_USE_CALLBACKS == 1 )
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/* prvReadNameField is defined in this configuration */
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#else
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/* prvReadNameField is not defined in this configuration, stub it. */
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size_t prvReadNameField( const uint8_t *pucByte,
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size_t uxRemainingBytes,
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char *pcName,
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size_t uxDestLen )
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{
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return 0;
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}
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#endif
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/****************************************************************
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* Proof of prvReadNameField function contract
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****************************************************************/
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void harness() {
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__CPROVER_assert(NETWORK_BUFFER_SIZE < CBMC_MAX_OBJECT_SIZE,
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"NETWORK_BUFFER_SIZE < CBMC_MAX_OBJECT_SIZE");
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__CPROVER_assert(NAME_SIZE < CBMC_MAX_OBJECT_SIZE,
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"NAME_SIZE < CBMC_MAX_OBJECT_SIZE");
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__CPROVER_assert(NAME_SIZE >= 4,
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"NAME_SIZE >= 4 required for good coverage.");
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size_t uxRemainingBytes;
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size_t uxDestLen;
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uint8_t *pucByte = malloc(uxRemainingBytes);
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char *pcName = malloc(uxDestLen);
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/* Preconditions */
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__CPROVER_assume(uxRemainingBytes < CBMC_MAX_OBJECT_SIZE);
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__CPROVER_assume(uxDestLen < CBMC_MAX_OBJECT_SIZE);
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__CPROVER_assume(uxRemainingBytes <= NETWORK_BUFFER_SIZE);
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__CPROVER_assume(uxDestLen <= NAME_SIZE);
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__CPROVER_assume( pucByte != NULL );
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__CPROVER_assume( pcName != NULL );
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/* Avoid overflow on uxSourceLen - 1U with uxSourceLen == uxRemainingBytes */
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//__CPROVER_assume(uxRemainingBytes > 0);
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/* Avoid overflow on uxDestLen - 1U */
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__CPROVER_assume(uxDestLen > 0);
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size_t index = prvReadNameField( pucByte,
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uxRemainingBytes,
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pcName,
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uxDestLen );
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/* Postconditions */
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__CPROVER_assert( index <= uxDestLen+1 && index <= uxRemainingBytes,
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"prvReadNamefield: index <= uxDestLen+1");
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}
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