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/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "queue.h"
/* FreeRTOS+TCP includes. */
#include "FreeRTOS_IP.h"
#include "FreeRTOS_IP_Private.h"
#include "FreeRTOS_TCP_IP.h"
#include "FreeRTOS_Stream_Buffer.h"
/* This proof assumes FreeRTOS_socket, pxTCPSocketLookup and
pxGetNetworkBufferWithDescriptor are implemented correctly.
It also assumes prvSingleStepTCPHeaderOptions, prvCheckOptions, prvTCPPrepareSend,
prvTCPHandleState and prvTCPReturnPacket are correct. These functions are
proved to be correct separately. */
/* Implementation of safe malloc */
void *safeMalloc(size_t xWantedSize ){
if(xWantedSize == 0){
return NULL;
}
uint8_t byte;
return byte ? malloc(xWantedSize) : NULL;
}
/* Abstraction of FreeRTOS_socket */
Socket_t FreeRTOS_socket( BaseType_t xDomain, BaseType_t xType, BaseType_t xProtocol) {
return safeMalloc(sizeof(FreeRTOS_Socket_t));
}
/* Abstraction of pxTCPSocketLookup */
FreeRTOS_Socket_t *pxTCPSocketLookup(uint32_t ulLocalIP, UBaseType_t uxLocalPort, uint32_t ulRemoteIP, UBaseType_t uxRemotePort) {
FreeRTOS_Socket_t * xRetSocket = safeMalloc(sizeof(FreeRTOS_Socket_t));
if (xRetSocket) {
xRetSocket->u.xTCP.txStream = safeMalloc(sizeof(StreamBuffer_t));
xRetSocket->u.xTCP.pxPeerSocket = safeMalloc(sizeof(StreamBuffer_t));
}
return xRetSocket;
}
/* Abstraction of pxGetNetworkBufferWithDescriptor */
NetworkBufferDescriptor_t *pxGetNetworkBufferWithDescriptor( size_t xRequestedSizeBytes, TickType_t xBlockTimeTicks ){
NetworkBufferDescriptor_t *pxNetworkBuffer = safeMalloc(sizeof(NetworkBufferDescriptor_t));
if(pxNetworkBuffer) {
pxNetworkBuffer->pucEthernetBuffer = safeMalloc(xRequestedSizeBytes);
__CPROVER_assume(pxNetworkBuffer->xDataLength == ipSIZE_OF_ETH_HEADER + sizeof(int32_t));
}
return pxNetworkBuffer;
}
void harness() {
NetworkBufferDescriptor_t *pxNetworkBuffer = safeMalloc(sizeof(NetworkBufferDescriptor_t));
if (pxNetworkBuffer) {
pxNetworkBuffer->pucEthernetBuffer = safeMalloc(sizeof(TCPPacket_t));
}
if (pxNetworkBuffer && pxNetworkBuffer->pucEthernetBuffer) {
xProcessReceivedTCPPacket(pxNetworkBuffer);
}
}
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