mac_primary_client_handle
mcip = mac_primary_client_handle(mip);
mcip = mac_primary_client_handle(mip);
mcip = mac_primary_client_handle(mip);
mcip = mac_primary_client_handle(mip);
(group_only_mcip = mac_primary_client_handle(mip)) !=
grp_only_mcip = mac_primary_client_handle(mip);
extern mac_client_impl_t *mac_primary_client_handle(mac_impl_t *);