From: Aniruddha R Kanhere <kanherea@amazon.com>
Date: Wed, 03 June 2020 09:51:25 +0000
Subject: [PATCH] modified lib

---
 .../freertos_plus_tcp/source/FreeRTOS_TCP_IP.c     | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/FreeRTOS_TCP_IP.c b/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/FreeRTOS_TCP_IP.c
index 7a2c00c68..cb537b347 100644
--- a/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/FreeRTOS_TCP_IP.c
+++ b/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/FreeRTOS_TCP_IP.c
@@ -198,14 +198,22 @@ static BaseType_t prvTCPPrepareConnect( FreeRTOS_Socket_t *pxSocket );
 /*
  * Parse the TCP option(s) received, if present.
  */
+#ifdef CBMC
+void prvCheckOptions( FreeRTOS_Socket_t *pxSocket, const NetworkBufferDescriptor_t *pxNetworkBuffer );
+#else
 static void prvCheckOptions( FreeRTOS_Socket_t *pxSocket, const NetworkBufferDescriptor_t *pxNetworkBuffer );
+#endif
 
 /*
  * Identify and deal with a single TCP header option, advancing the pointer to
  * the header. This function returns pdTRUE or pdFALSE depending on whether the
  * caller should continue to parse more header options or break the loop.
  */
+#ifdef CBMC
+size_t prvSingleStepTCPHeaderOptions( const uint8_t * const pucPtr,
+#else
 static size_t prvSingleStepTCPHeaderOptions( const uint8_t * const pucPtr,
+#endif
 											 size_t uxTotalLength,
 											 FreeRTOS_Socket_t * const pxSocket,
 											 BaseType_t xHasSYNFlag );
@@ -215,7 +223,11 @@ static size_t prvSingleStepTCPHeaderOptions( const uint8_t * const pucPtr,
 	 * Skip past TCP header options when doing Selective ACK, until there are no
 	 * more options left.
 	 */
+	#ifdef CBMC
+	void prvReadSackOption( const uint8_t * const pucPtr,
+	#else
 	static void prvReadSackOption( const uint8_t * const pucPtr,
+	#endif
 								   size_t uxIndex,
 								   FreeRTOS_Socket_t * const pxSocket );
 #endif/* ( ipconfigUSE_TCP_WIN == 1 ) */
@@ -1137,7 +1149,11 @@ uint32_t ulInitialSequenceNumber = 0;
  * that: ((pxTCPHeader->ucTCPOffset & 0xf0) > 0x50), meaning that the TP header
  * is longer than the usual 20 (5 x 4) bytes.
  */
+#ifdef CBMC
+void prvCheckOptions( FreeRTOS_Socket_t *pxSocket, const NetworkBufferDescriptor_t *pxNetworkBuffer )
+#else
 static void prvCheckOptions( FreeRTOS_Socket_t *pxSocket, const NetworkBufferDescriptor_t *pxNetworkBuffer )
+#endif
 {
 size_t uxTCPHeaderOffset = ipSIZE_OF_ETH_HEADER + xIPHeaderSize( pxNetworkBuffer );
 const ProtocolHeaders_t *pxProtocolHeaders = ipPOINTER_CAST( ProtocolHeaders_t *,
@@ -1199,7 +1215,11 @@ uint8_t ucLength;
 }
 /*-----------------------------------------------------------*/
 
+#ifdef CBMC
+size_t prvSingleStepTCPHeaderOptions( const uint8_t * const pucPtr,
+#else
 static size_t prvSingleStepTCPHeaderOptions( const uint8_t * const pucPtr,
+#endif
 											 size_t uxTotalLength,
 											 FreeRTOS_Socket_t * const pxSocket,
 											 BaseType_t xHasSYNFlag )
@@ -1331,7 +1351,11 @@ TCPWindow_t *pxTCPWindow = &( pxSocket->u.xTCP.xTCPWindow );
 /*-----------------------------------------------------------*/
 
 #if( ipconfigUSE_TCP_WIN == 1 )
+	#ifdef CBMC
+	void prvReadSackOption( const uint8_t * const pucPtr,
+	#else
 	static void prvReadSackOption( const uint8_t * const pucPtr,
+	#endif
 								   size_t uxIndex,
 								   FreeRTOS_Socket_t * const pxSocket )
 	{