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#ifndef _TCP_DIAG_H_
#define _TCP_DIAG_H_ 1

/* Just some random number */
#define TCPDIAG_GETSOCK 18

/* Socket identity */
struct tcpdiag_sockid
{
        __u16   tcpdiag_sport;
        __u16   tcpdiag_dport;
        __u32   tcpdiag_src[4];
        __u32   tcpdiag_dst[4];
        __u32   tcpdiag_if;
        __u32   tcpdiag_cookie[2];
#define TCPDIAG_NOCOOKIE (~0U)
};

/* Request structure */

struct tcpdiagreq
{
        __u8    tcpdiag_family;         /* Family of addresses. */
        __u8    tcpdiag_src_len;
        __u8    tcpdiag_dst_len;
        __u8    tcpdiag_ext;            /* Query extended information */

        struct tcpdiag_sockid id;

        __u32   tcpdiag_states;         /* States to dump */
        __u32   tcpdiag_dbs;            /* Tables to dump (NI) */
};

enum
{
        TCPDIAG_REQ_NONE,
        TCPDIAG_REQ_BYTECODE,
};

#define TCPDIAG_REQ_MAX TCPDIAG_REQ_BYTECODE

/* Bytecode is sequence of 4 byte commands followed by variable arguments.
 * All the commands identified by "code" are conditional jumps forward:
 * to offset cc+"yes" or to offset cc+"no". "yes" is supposed to be
 * length of the command and its arguments.
 */
 
struct tcpdiag_bc_op
{
        unsigned char   code;
        unsigned char   yes;
        unsigned short  no;
};

enum
{
        TCPDIAG_BC_NOP,
        TCPDIAG_BC_JMP,
        TCPDIAG_BC_S_GE,
        TCPDIAG_BC_S_LE,
        TCPDIAG_BC_D_GE,
        TCPDIAG_BC_D_LE,
        TCPDIAG_BC_AUTO,
        TCPDIAG_BC_S_COND,
        TCPDIAG_BC_D_COND,
};

struct tcpdiag_hostcond
{
        __u8    family;
        __u8    prefix_len;
        int     port;
        __u32   addr[0];
};

/* Base info structure. It contains socket identity (addrs/ports/cookie)
 * and, alas, the information shown by netstat. */
struct tcpdiagmsg
{
        __u8    tcpdiag_family;
        __u8    tcpdiag_state;
        __u8    tcpdiag_timer;
        __u8    tcpdiag_retrans;

        struct tcpdiag_sockid id;

        __u32   tcpdiag_expires;
        __u32   tcpdiag_rqueue;
        __u32   tcpdiag_wqueue;
        __u32   tcpdiag_uid;
        __u32   tcpdiag_inode;
};

/* Extensions */

enum
{
        TCPDIAG_NONE,
        TCPDIAG_MEMINFO,
        TCPDIAG_INFO,
};

#define TCPDIAG_MAX TCPDIAG_INFO


/* TCPDIAG_MEM */

struct tcpdiag_meminfo
{
        __u32   tcpdiag_rmem;
        __u32   tcpdiag_wmem;
        __u32   tcpdiag_fmem;
        __u32   tcpdiag_tmem;
};

#endif /* _TCP_DIAG_H_ */