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

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

/* This assumes the length of pcHostName is bounded by MAX_HOSTNAME_LEN and the size of UDPPayloadBuffer is bounded by
MAX_REQ_SIZE. */

void *safeMalloc(size_t xWantedSize) {
	if(xWantedSize == 0) {
		return NULL;
	}
	uint8_t byte;
	return byte ? malloc(xWantedSize) : NULL;
}

/* Abstraction of FreeRTOS_GetUDPPayloadBuffer. This should be checked later. For now we are allocating a fixed sized memory of size MAX_REQ_SIZE. */
void * FreeRTOS_GetUDPPayloadBuffer(size_t xRequestedSizeBytes, TickType_t xBlockTimeTicks ) {
	void *pvReturn = safeMalloc(MAX_REQ_SIZE);
	return pvReturn;
}

/* Abstraction of FreeRTOS_socket. This abstraction allocates a memory of size Socket_t. */
Socket_t FreeRTOS_socket( BaseType_t xDomain, BaseType_t xType, BaseType_t xProtocol ) {
	Socket_t xSocket = safeMalloc(sizeof(Socket_t)); /* Replaced malloc by safeMalloc */
	return xSocket;
}

/* This function only uses the return value of prvParseDNSReply. Hence it returns an unconstrained uint32 value */
uint32_t prvParseDNSReply( uint8_t *pucUDPPayloadBuffer,
			   size_t xBufferLength,
			   BaseType_t xExpected ) {}

void harness() {
	size_t len;
	__CPROVER_assume(len >= 0 && len <= MAX_HOSTNAME_LEN);
	char *pcHostName = safeMalloc(len); /* Replaced malloc by safeMalloc */
	if (len && pcHostName) {
		pcHostName[len-1] = NULL;
	}
	if (pcHostName) { /* Guarding against NULL pointer */
		FreeRTOS_gethostbyname(pcHostName);
	}
}
