strace/linux/netlink_diag.h

struct netlink_diag_req {
	uint8_t sdiag_family;
	uint8_t sdiag_protocol;
	uint16_t pad;
	uint32_t ndiag_ino;
	uint32_t ndiag_show;
	uint32_t ndiag_cookie[2];
};

struct netlink_diag_msg {
	uint8_t ndiag_family;
	uint8_t ndiag_type;
	uint8_t ndiag_protocol;
	uint8_t ndiag_state;

	uint32_t ndiag_portid;
	uint32_t ndiag_dst_portid;
	uint32_t ndiag_dst_group;
	uint32_t ndiag_ino;
	uint32_t ndiag_cookie[2];
};

#define NDIAG_SHOW_MEMINFO           0x00000001
#define NDIAG_PROTO_ALL              ((uint8_t) ~0)