Misc changes (#183)

FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/FreeRTOS_DNS.c

@@ -537,7 +537,7 @@ TickType_t uxIdentifier = 0U;
 	{
 		if( pcHostName != NULL )
 		{
-		size_t xLength = strlen( pcHostName ) + 1;
+		size_t xLength = strlen( pcHostName ) + 1U;
 
 			if( xLength <= ipconfigDNS_CACHE_NAME_LENGTH )
 			{
@@ -1298,7 +1298,7 @@ BaseType_t xReturn = pdTRUE;
 									usNumARecordsStored++;    /* Track # of A records stored */
 								}
 
-								FreeRTOS_inet_ntop( FREERTOS_AF_INET, ( const void * ) &( ulIPAddress ), cBuffer, sizeof( cBuffer ) );
+								( void ) FreeRTOS_inet_ntop( FREERTOS_AF_INET, ( const void * ) &( ulIPAddress ), cBuffer, sizeof( cBuffer ) );
 								/* Show what has happened. */
 								FreeRTOS_printf( ( "DNS[0x%04lX]: The answer to '%s' (%s) will%s be stored\n",
 												   ( UBaseType_t ) pxDNSMessageHeader->usIdentifier,

FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/FreeRTOS_IP.c

@@ -1640,11 +1640,11 @@ eFrameProcessingResult_t eReturn = eProcessBuffer;
 				if( pxIPPacket->xIPHeader.ucProtocol == ( uint8_t ) ipPROTOCOL_UDP )
 				{
 				ProtocolPacket_t *pxProtPack;
-				uint16_t *pusChecksum;
+				const uint16_t *pusChecksum;
 
 					/* pxProtPack will point to the offset were the protocols begin. */
 					pxProtPack = ipPOINTER_CAST( ProtocolPacket_t *, &( pxNetworkBuffer->pucEthernetBuffer[ uxHeaderLength - ipSIZE_OF_IPv4_HEADER ] ) );
-					pusChecksum = ( uint16_t * ) ( &( pxProtPack->xUDPPacket.xUDPHeader.usChecksum ) );
+					pusChecksum = ( const uint16_t * ) ( &( pxProtPack->xUDPPacket.xUDPHeader.usChecksum ) );
 					if( *pusChecksum == ( uint16_t ) 0U )
 					{
 						#if( ipconfigHAS_PRINTF != 0 )

FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/include/FreeRTOSIPConfigDefaults.h

@@ -434,7 +434,7 @@ from the FreeRTOSIPConfig.h configuration header file. */
 	#ifndef ipconfigDNS_CACHE_NAME_LENGTH
 		/* Per https://tools.ietf.org/html/rfc1035, 253 is the maximum string length
 		of a DNS name. The following default accounts for a null terminator. */
-		#define ipconfigDNS_CACHE_NAME_LENGTH   254
+		#define ipconfigDNS_CACHE_NAME_LENGTH   254U
 	#endif
 
 	#ifndef ipconfigDNS_CACHE_ENTRIES