/*      $OpenBSD: ip_ether.h,v 1.30 2019/10/04 05:00:49 dlg Exp $ */
/*
 * The author of this code is Angelos D. Keromytis (angelos@adk.gr)
 *
 * This code was written by Angelos D. Keromytis in October 1999.
 *
 * Copyright (C) 1999-2001 Angelos D. Keromytis.
 *
 * Permission to use, copy, and modify this software with or without fee
 * is hereby granted, provided that this entire notice is included in
 * all copies of any software which is or includes a copy or
 * modification of this software.
 * You may use this code under the GNU public license if you so wish. Please
 * contribute changes back to the authors under this freer than GPL license
 * so that we may further the use of strong encryption without limitations to
 * all.
 *
 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
 * PURPOSE.
 */

#ifndef _NETINET_IP_ETHER_H_
#define _NETINET_IP_ETHER_H_

/*
 * Ethernet-inside-IP processing.
 */

struct etheripstat {
        u_int64_t       etherips_hdrops;        /* packet shorter than header shows */
        u_int64_t       etherips_qfull;         /* bridge queue full, packet dropped */
        u_int64_t       etherips_noifdrops;     /* no interface/bridge information */
        u_int64_t       etherips_pdrops;        /* packet dropped due to policy */
        u_int64_t       etherips_adrops;        /* all other drops */
        u_int64_t       etherips_ipackets;      /* total input packets */
        u_int64_t       etherips_opackets;      /* total output packets */
        u_int64_t       etherips_ibytes;        /* input bytes */
        u_int64_t       etherips_obytes;        /* output bytes */
};

struct etherip_header {
#if BYTE_ORDER == LITTLE_ENDIAN
        u_int           eip_res:4;      /* reserved */
        u_int           eip_ver:4;      /* version */
#endif
#if BYTE_ORDER == BIG_ENDIAN
        u_int           eip_ver:4;      /* version */
        u_int           eip_res:4;      /* reserved */
#endif
        u_int8_t        eip_pad;        /* required padding byte */
} __packed;

#define ETHERIP_VERSION         0x03

/*
 * Names for Ether-IP sysctl objects
 */
#define ETHERIPCTL_ALLOW        1       /* accept incoming EtherIP packets */
#define ETHERIPCTL_STATS        2       /* etherip stats */
#define ETHERIPCTL_MAXID        3

#define ETHERIPCTL_NAMES { \
        { 0, 0 }, \
        { "allow", CTLTYPE_INT }, \
        { "stats", CTLTYPE_STRUCT }, \
}

#ifdef _KERNEL

#include <sys/percpu.h>

enum etheripstat_counters {
        etherips_hdrops,                /* packet shorter than header shows */
        etherips_qfull,                 /* bridge queue full, packet dropped */
        etherips_noifdrops,             /* no interface/bridge information */
        etherips_pdrops,                /* packet dropped due to policy */
        etherips_adrops,                /* all other drops */
        etherips_ipackets,              /* total input packets */
        etherips_opackets,              /* total output packets */
        etherips_ibytes,                /* input bytes */
        etherips_obytes,                /* output bytes */

        etherips_ncounters
};

extern struct cpumem *etheripcounters;

static inline void
etheripstat_inc(enum etheripstat_counters c)
{
        counters_inc(etheripcounters, c);
}

static inline void
etheripstat_add(enum etheripstat_counters c, uint64_t v)
{
        counters_add(etheripcounters, c, v);
}

static inline void
etheripstat_pkt(enum etheripstat_counters pcounter,
    enum etheripstat_counters bcounter, uint64_t v)
{
        counters_pkt(etheripcounters, pcounter, bcounter, v);
}

#endif /* _KERNEL */
#endif /* _NETINET_IP_ETHER_H_ */