root/include/linux/inet_diag.h

INCLUDED FROM

#ifndef _INET_DIAG_H_
#define _INET_DIAG_H_ 1

/* Just some random number */
#define TCPDIAG_GETSOCK 18
#define DCCPDIAG_GETSOCK 19

#define INET_DIAG_GETSOCK_MAX 24

/* Socket identity */
struct inet_diag_sockid {
        __be16  idiag_sport;
        __be16  idiag_dport;
        __be32  idiag_src[4];
        __be32  idiag_dst[4];
        __u32   idiag_if;
        __u32   idiag_cookie[2];
#define INET_DIAG_NOCOOKIE (~0U)
};

/* Request structure */

struct inet_diag_req {
        __u8    idiag_family;           /* Family of addresses. */
        __u8    idiag_src_len;
        __u8    idiag_dst_len;
        __u8    idiag_ext;              /* Query extended information */

        struct inet_diag_sockid id;

        __u32   idiag_states;           /* States to dump */
        __u32   idiag_dbs;              /* Tables to dump (NI) */
};

enum {
        INET_DIAG_REQ_NONE,
        INET_DIAG_REQ_BYTECODE,
};

#define INET_DIAG_REQ_MAX INET_DIAG_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 inet_diag_bc_op {
        unsigned char   code;
        unsigned char   yes;
        unsigned short  no;
};

enum {
        INET_DIAG_BC_NOP,
        INET_DIAG_BC_JMP,
        INET_DIAG_BC_S_GE,
        INET_DIAG_BC_S_LE,
        INET_DIAG_BC_D_GE,
        INET_DIAG_BC_D_LE,
        INET_DIAG_BC_AUTO,
        INET_DIAG_BC_S_COND,
        INET_DIAG_BC_D_COND,
};

struct inet_diag_hostcond {
        __u8    family;
        __u8    prefix_len;
        int     port;
        __be32  addr[0];
};

/* Base info structure. It contains socket identity (addrs/ports/cookie)
 * and, alas, the information shown by netstat. */
struct inet_diag_msg {
        __u8    idiag_family;
        __u8    idiag_state;
        __u8    idiag_timer;
        __u8    idiag_retrans;

        struct inet_diag_sockid id;

        __u32   idiag_expires;
        __u32   idiag_rqueue;
        __u32   idiag_wqueue;
        __u32   idiag_uid;
        __u32   idiag_inode;
};

/* Extensions */

enum {
        INET_DIAG_NONE,
        INET_DIAG_MEMINFO,
        INET_DIAG_INFO,
        INET_DIAG_VEGASINFO,
        INET_DIAG_CONG,
};

#define INET_DIAG_MAX INET_DIAG_CONG


/* INET_DIAG_MEM */

struct inet_diag_meminfo {
        __u32   idiag_rmem;
        __u32   idiag_wmem;
        __u32   idiag_fmem;
        __u32   idiag_tmem;
};

/* INET_DIAG_VEGASINFO */

struct tcpvegas_info {
        __u32   tcpv_enabled;
        __u32   tcpv_rttcnt;
        __u32   tcpv_rtt;
        __u32   tcpv_minrtt;
};

#ifdef __KERNEL__
struct sock;
struct inet_hashinfo;

struct inet_diag_handler {
        struct inet_hashinfo    *idiag_hashinfo;
        void                    (*idiag_get_info)(struct sock *sk,
                                                  struct inet_diag_msg *r,
                                                  void *info);
        __u16                   idiag_info_size;
        __u16                   idiag_type;
};

extern int  inet_diag_register(const struct inet_diag_handler *handler);
extern void inet_diag_unregister(const struct inet_diag_handler *handler);
#endif /* __KERNEL__ */

#endif /* _INET_DIAG_H_ */