Fix ARP lookups for gateway address when destination is outside of subnet

tony-josi-aws · tony-josi-aws · commit ba931bc2dc31 · 2025-05-06T11:58:24.000+05:30
diff --git a/source/FreeRTOS_UDP_IPv4.c b/source/FreeRTOS_UDP_IPv4.c
@@ -273,8 +273,7 @@ void vProcessGeneratedUDPPacket_IPv4( NetworkBufferDescriptor_t * const pxNetwor
 
             /* 'ulIPAddress' might have become the address of the Gateway.
              * Find the route again. */
-
-            pxNetworkBuffer->pxEndPoint = FreeRTOS_FindEndPointOnNetMask( pxNetworkBuffer->xIPAddress.ulIP_IPv4 );
+            pxNetworkBuffer->pxEndPoint = FreeRTOS_FindEndPointOnNetMask( ulIPAddress );
 
             if( pxNetworkBuffer->pxEndPoint == NULL )
             {

Original file line number	Diff line number	Diff line change
`@@ -273,8 +273,7 @@ void vProcessGeneratedUDPPacket_IPv4( NetworkBufferDescriptor_t * const pxNetwor`
`273`	`273`
`274`	`274`	`/* 'ulIPAddress' might have become the address of the Gateway.`
`275`	`275`	`* Find the route again. */`
`276`		`-`
`277`		`- pxNetworkBuffer->pxEndPoint = FreeRTOS_FindEndPointOnNetMask( pxNetworkBuffer->xIPAddress.ulIP_IPv4 );`
	`276`	`+ pxNetworkBuffer->pxEndPoint = FreeRTOS_FindEndPointOnNetMask( ulIPAddress );`
`278`	`277`
`279`	`278`	`if( pxNetworkBuffer->pxEndPoint == NULL )`
`280`	`279`	`{`