PF_GR_TICKET
{ .type = PF_GR_TICKET, .off = _OUT(ticket), .cb = snl_attr_get_uint32 },
snl_add_msg_attr_u32(&nw, PF_GR_TICKET, ticket);
nlattr_add_u32(nw, PF_GR_TICKET, attrs.ticket);
{ .type = PF_GR_TICKET, .off = _OUT(ticket), .cb = nlattr_get_uint32 },