root/include/linux/netfilter/xt_hashlimit.h

INCLUDED FROM

#ifndef _XT_HASHLIMIT_H
#define _XT_HASHLIMIT_H

/* timings are in milliseconds. */
#define XT_HASHLIMIT_SCALE 10000
/* 1/10,000 sec period => max of 10,000/sec.  Min rate is then 429490
   seconds, or one every 59 hours. */

/* details of this structure hidden by the implementation */
struct xt_hashlimit_htable;

enum {
        XT_HASHLIMIT_HASH_DIP = 1 << 0,
        XT_HASHLIMIT_HASH_DPT = 1 << 1,
        XT_HASHLIMIT_HASH_SIP = 1 << 2,
        XT_HASHLIMIT_HASH_SPT = 1 << 3,
        XT_HASHLIMIT_INVERT   = 1 << 4,
};

struct hashlimit_cfg {
        u_int32_t mode;   /* bitmask of XT_HASHLIMIT_HASH_* */
        u_int32_t avg;    /* Average secs between packets * scale */
        u_int32_t burst;  /* Period multiplier for upper limit. */

        /* user specified */
        u_int32_t size;         /* how many buckets */
        u_int32_t max;          /* max number of entries */
        u_int32_t gc_interval;  /* gc interval */
        u_int32_t expire;       /* when do entries expire? */
};

struct xt_hashlimit_info {
        char name [IFNAMSIZ];           /* name */
        struct hashlimit_cfg cfg;

        /* Used internally by the kernel */
        struct xt_hashlimit_htable *hinfo;
        union {
                void *ptr;
                struct xt_hashlimit_info *master;
        } u;
};

struct hashlimit_cfg1 {
        u_int32_t mode;   /* bitmask of XT_HASHLIMIT_HASH_* */
        u_int32_t avg;    /* Average secs between packets * scale */
        u_int32_t burst;  /* Period multiplier for upper limit. */

        /* user specified */
        u_int32_t size;         /* how many buckets */
        u_int32_t max;          /* max number of entries */
        u_int32_t gc_interval;  /* gc interval */
        u_int32_t expire;       /* when do entries expire? */

        u_int8_t srcmask, dstmask;
};

struct xt_hashlimit_mtinfo1 {
        char name[IFNAMSIZ];
        struct hashlimit_cfg1 cfg;

        /* Used internally by the kernel */
        struct xt_hashlimit_htable *hinfo __attribute__((aligned(8)));
};

#endif /*_XT_HASHLIMIT_H*/