UDP_TUNNEL_NIC_ENTRY_OP_FAIL
bool dodgy = entry->flags & UDP_TUNNEL_NIC_ENTRY_OP_FAIL;
entry->flags &= ~UDP_TUNNEL_NIC_ENTRY_OP_FAIL;
entry->flags |= UDP_TUNNEL_NIC_ENTRY_OP_FAIL;
bool dodgy = entry->flags & UDP_TUNNEL_NIC_ENTRY_OP_FAIL;
UDP_TUNNEL_NIC_ENTRY_OP_FAIL);