fix: Reverting the hardware address to use NUD_PERMANENT for ipv6 cases (#1535)

* Adding constant hardware address to the veth

* update the variable and error log message

* Removing the shadow variable

* Removing the shadow variable

* Adding the hardware ad address while endpoint creation

* Refactoring based on the comments

* Updated based on comments

* removing merge conflicts

* update the function parameter

* Addressing comments

* go lint errors

* updating the IPAddr variable

* updating the state to NUD PROBE for transparent endpoint

* Reverting the hardware address to use NUD_PERMANENT

Co-authored-by: root <[email protected]>

Author: vipul-21

network/transparent_endpointclient_linux.go

@@ -306,7 +306,7 @@ func (client *TransparentEndpointClient) setIPV6NeighEntry() error {
 		MacAddress: client.hostVethMac,
 	}
 
-	if err := client.netlink.SetOrRemoveLinkAddress(linkInfo, netlink.ADD, netlink.NUD_PROBE); err != nil {
+	if err := client.netlink.SetOrRemoveLinkAddress(linkInfo, netlink.ADD, netlink.NUD_PERMANENT); err != nil {
 		log.Printf("Failed setting neigh entry in container: %+v", err)
 		return fmt.Errorf("Failed setting neigh entry in container: %w", err)
 	}