do not let through unicast packets on inactive endpoints (#1186)

* do not let through unicast packets on inactive endpoints

* Modified test_FreeRTOS_FindEndPointOnIP_IPv4_ZeroAddressEndpoint()

* Fix unit tests

* Fix link verification check

---------

Co-authored-by: Tony Josi <tonyjosi@amazon.com>

Author: AlfaSegato

source/FreeRTOS_IPv4.c

@@ -321,9 +321,7 @@ enum eFrameProcessingResult prvAllowIPPacketIPv4( const struct xIP_PACKET * cons
             ( FreeRTOS_FindEndPointOnIP_IPv4( ulDestinationIPAddress ) == NULL ) &&
             /* Is it an IPv4 broadcast address x.x.x.255 ? */
             ( ( FreeRTOS_ntohl( ulDestinationIPAddress ) & 0xffU ) != 0xffU ) &&
-            ( xIsIPv4Multicast( ulDestinationIPAddress ) == pdFALSE ) &&
-            /* Or (during DHCP negotiation) we have no IP-address yet? */
-            ( FreeRTOS_IsNetworkUp() != pdFALSE ) )
+            ( xIsIPv4Multicast( ulDestinationIPAddress ) == pdFALSE ) )
         {
             /* Packet is not for this node, release it */
             eReturn = eReleaseBuffer;

source/FreeRTOS_Routing.c

@@ -388,7 +388,6 @@ struct xIPv6_Couple
                 #endif
                 {
                     if( ( ulIPAddress == 0U ) ||
-                        ( pxEndPoint->ipv4_settings.ulIPAddress == 0U ) ||
                         ( pxEndPoint->ipv4_settings.ulIPAddress == ulIPAddress ) )
                     {
                         break;

source/portable/NetworkInterface/RX/NetworkInterface.c

@@ -12,7 +12,7 @@
 * Renesas reserves the right, without notice, to make changes to this software and to discontinue the availability of
 * this software. By using this software, you agree to the additional terms and conditions found by accessing the
 * following link:
-* http://www.renesas.com/disclaimer
+* https://www.renesas.com/en/document/oth/disclaimer8
 *
 * Copyright (C) 2020 Renesas Electronics Corporation. All rights reserved.
 ***********************************************************************************************************************/

source/portable/NetworkInterface/RX/ether_callback.c

@@ -12,7 +12,7 @@
 * Renesas reserves the right, without notice, to make changes to this software and to discontinue the availability of
 * this software. By using this software, you agree to the additional terms and conditions found by accessing the
 * following link:
-* http://www.renesas.com/disclaimer
+* https://www.renesas.com/en/document/oth/disclaimer8
 *
 * Copyright (C) 2015 Renesas Electronics Corporation. All rights reserved.
 ***********************************************************************************************************************/

test/unit-test/FreeRTOS_IPv4/FreeRTOS_IPv4_utest.c

@@ -262,7 +262,6 @@ void test_prvAllowIPPacketIPv4_NotMatchingIP( void )
     pxIPHeader->ulDestinationIPAddress = pxEndpoint->ipv4_settings.ulIPAddress + 1;
 
     FreeRTOS_FindEndPointOnIP_IPv4_ExpectAnyArgsAndReturn( NULL ); /* From prvAllowIPPacketIPv4() */
-    FreeRTOS_IsNetworkUp_ExpectAndReturn( pdTRUE );
 
     eResult = prvAllowIPPacketIPv4( pxIPPacket, pxNetworkBuffer, uxHeaderLength );
 
@@ -417,7 +416,6 @@ void test_prvAllowIPPacketIPv4_SourceIPBrdCast_NoLocalIP( void )
 
 
     FreeRTOS_FindEndPointOnIP_IPv4_ExpectAnyArgsAndReturn( NULL ); /* From prvAllowIPPacketIPv4() */
-    FreeRTOS_IsNetworkUp_ExpectAndReturn( pdFALSE );
 
     eResult = prvAllowIPPacketIPv4( pxIPPacket, pxNetworkBuffer, uxHeaderLength );
 
@@ -455,7 +453,6 @@ void test_prvAllowIPPacketIPv4_DestMACBrdCast_DestIPUnicast( void )
 
 
     FreeRTOS_FindEndPointOnIP_IPv4_ExpectAnyArgsAndReturn( NULL ); /* From prvAllowIPPacketIPv4() */
-    FreeRTOS_IsNetworkUp_ExpectAndReturn( pdTRUE );
 
     eResult = prvAllowIPPacketIPv4( pxIPPacket, pxNetworkBuffer, uxHeaderLength );
 

test/unit-test/FreeRTOS_Routing/FreeRTOS_Routing_utest.c

@@ -1440,25 +1440,33 @@ void test_FreeRTOS_FindEndPointOnIP_IPv4_AnyEndpoint( void )
  * pxNetworkEndPoints is a global variable using in FreeRTOS_Routing as link list head of all endpoints.
  *
  * Test step:
- *  - Create 1 endpoint with IP address 0 and add it to the list.
- *  - Call FreeRTOS_FindEndPointOnIP_IPv4 to query with IPV4_DEFAULT_ADDRESS.
+ *  - Create 1 endpoint with IP address 0xAB12CD34 and add it to the list.
+ *  - Call FreeRTOS_FindEndPointOnIP_IPv4 to query with 0xAB12CD34.
  *  - Check if returned endpoint is same.
- *  - Call FreeRTOS_FindEndPointOnIP_IPv4 to query with IPV4_DEFAULT_GATEWAY.
+ *  - Call FreeRTOS_FindEndPointOnIP_IPv4 to query with 0.
  *  - Check if returned endpoint is same.
+ *  - Call FreeRTOS_FindEndPointOnIP_IPv4 to query with IPV4_DEFAULT_ADDRESS.
+ *  - Check if returned endpoint is NULL.
+ *  - Call FreeRTOS_FindEndPointOnIP_IPv4 to query with IPV4_DEFAULT_GATEWAY.
+ *  - Check if returned endpoint is NULL.
  */
 void test_FreeRTOS_FindEndPointOnIP_IPv4_ZeroAddressEndpoint( void )
 {
     NetworkEndPoint_t xEndPoint;
     NetworkEndPoint_t * pxEndPoint = NULL;
 
     memset( &xEndPoint, 0, sizeof( NetworkEndPoint_t ) );
-    xEndPoint.ipv4_settings.ulIPAddress = 0;
+    xEndPoint.ipv4_settings.ulIPAddress = 0xAB12CD34;
     pxNetworkEndPoints = &xEndPoint;
 
-    pxEndPoint = FreeRTOS_FindEndPointOnIP_IPv4( IPV4_DEFAULT_ADDRESS );
+    pxEndPoint = FreeRTOS_FindEndPointOnIP_IPv4( 0xAB12CD34 );
     TEST_ASSERT_EQUAL( &xEndPoint, pxEndPoint );
-    pxEndPoint = FreeRTOS_FindEndPointOnIP_IPv4( IPV4_DEFAULT_GATEWAY );
+    pxEndPoint = FreeRTOS_FindEndPointOnIP_IPv4( 0 );
     TEST_ASSERT_EQUAL( &xEndPoint, pxEndPoint );
+    pxEndPoint = FreeRTOS_FindEndPointOnIP_IPv4( IPV4_DEFAULT_ADDRESS );
+    TEST_ASSERT_EQUAL( NULL, pxEndPoint );
+    pxEndPoint = FreeRTOS_FindEndPointOnIP_IPv4( IPV4_DEFAULT_GATEWAY );
+    TEST_ASSERT_EQUAL( NULL, pxEndPoint );
 }
 
 /**