fib_rules.h

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#ifndef __LINUX_FIB_RULES_H
#define __LINUX_FIB_RULES_H

#include <linux/types.h>
#include <linux/rtnetlink.h>

/* rule is permanent, and cannot be deleted */
#define FIB_RULE_PERMANENT  0x00000001
#define FIB_RULE_INVERT     0x00000002
#define FIB_RULE_UNRESOLVED 0x00000004
#define FIB_RULE_IIF_DETACHED   0x00000008
#define FIB_RULE_DEV_DETACHED   FIB_RULE_IIF_DETACHED
#define FIB_RULE_OIF_DETACHED   0x00000010

/* try to find source address in routing lookups */
#define FIB_RULE_FIND_SADDR 0x00010000

struct fib_rule_hdr {
    __u8        family;
    __u8        dst_len;
    __u8        src_len;
    __u8        tos;

    __u8        table;
    __u8        res1;   /* reserved */
    __u8        res2;   /* reserved */
    __u8        action;

    __u32       flags;
};

enum {
    FRA_UNSPEC,
    FRA_DST,    /* destination address */
    FRA_SRC,    /* source address */
    FRA_IIFNAME,    /* interface name */
#define FRA_IFNAME  FRA_IIFNAME
    FRA_GOTO,   /* target to jump to (FR_ACT_GOTO) */
    FRA_UNUSED2,
    FRA_PRIORITY,   /* priority/preference */
    FRA_UNUSED3,
    FRA_UNUSED4,
    FRA_UNUSED5,
    FRA_FWMARK, /* mark */
    FRA_FLOW,   /* flow/class id */
    FRA_UNUSED6,
    FRA_UNUSED7,
    FRA_UNUSED8,
    FRA_TABLE,  /* Extended table id */
    FRA_FWMASK, /* mask for netfilter mark */
    FRA_OIFNAME,
    __FRA_MAX
};

#define FRA_MAX (__FRA_MAX - 1)

enum {
    FR_ACT_UNSPEC,
    FR_ACT_TO_TBL,      /* Pass to fixed table */
    FR_ACT_GOTO,        /* Jump to another rule */
    FR_ACT_NOP,     /* No operation */
    FR_ACT_RES3,
    FR_ACT_RES4,
    FR_ACT_BLACKHOLE,   /* Drop without notification */
    FR_ACT_UNREACHABLE, /* Drop with ENETUNREACH */
    FR_ACT_PROHIBIT,    /* Drop with EACCES */
    __FR_ACT_MAX,
};

#define FR_ACT_MAX (__FR_ACT_MAX - 1)

#endif