From 2e83b80486debc40a77437e0b7d8b95f3cd3ea2f Mon Sep 17 00:00:00 2001
From: Vishwanath Martur <64204611+vishwamartur@users.noreply.github.com>
Date: Sun, 3 Nov 2024 14:27:56 +0530
Subject: [PATCH] Fix dropping of IPv6 packets with unspecified source address

Related to #1124

Remove the check for the source address being `::` in `prvAllowIPPacketIPv6` function.

* Update the comment to reflect that only the destination address is checked.
* Allow IPv6 packets with a source address of `::` to be processed further.
---
 source/FreeRTOS_IPv6.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/source/FreeRTOS_IPv6.c b/source/FreeRTOS_IPv6.c
index 0e8f85ea1..5ff703bdf 100644
--- a/source/FreeRTOS_IPv6.c
+++ b/source/FreeRTOS_IPv6.c
@@ -499,9 +499,8 @@ eFrameProcessingResult_t prvAllowIPPacketIPv6( const IPHeader_IPv6_t * const pxI
         BaseType_t xHasUnspecifiedAddress = pdFALSE;
 
         /* Drop if packet has unspecified IPv6 address (defined in RFC4291 - sec 2.5.2)
-         * either in source or destination address. */
-        if( ( memcmp( pxDestinationIPAddress->ucBytes, FreeRTOS_in6addr_any.ucBytes, sizeof( IPv6_Address_t ) ) == 0 ) ||
-            ( memcmp( pxSourceIPAddress->ucBytes, FreeRTOS_in6addr_any.ucBytes, sizeof( IPv6_Address_t ) ) == 0 ) )
+         * in destination address. */
+        if( memcmp( pxDestinationIPAddress->ucBytes, FreeRTOS_in6addr_any.ucBytes, sizeof( IPv6_Address_t ) ) == 0 )
         {
             xHasUnspecifiedAddress = pdTRUE;
         }