Add helpers which will be used in subsequent tests, they are:
- check_sg_entries: check for proper source list and S,G entry
existence
- check_sg_fwding: check for proper traffic forwarding/blocking
- check_sg_state: check for proper blocked/forwarding entry state
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
68d3163a4b