#endif
#ifndef     ICMP_UNREACH_NET_PROHIB
#define     ICMP_UNREACH_NET_PROHIB         9
#endif
#ifndef     ICMP_UNREACH_HOST_PROHIB
#define     ICMP_UNREACH_HOST_PROHIB        10
#endif
#ifndef     ICMP_UNREACH_TOSNET
#define     ICMP_UNREACH_TOSNET             11
#endif
#ifndef     ICMP_UNREACH_TOSHOST
#define     ICMP_UNREACH_TOSHOST            12
#endif
#ifndef     ICMP_UNREACH_FILTER_PROHIB
#define     ICMP_UNREACH_FILTER_PROHIB      13
#endif
#ifndef     ICMP_UNREACH_HOST_PRECEDENCE
#define     ICMP_UNREACH_HOST_PRECEDENCE    14
#endif
#ifndef     ICMP_UNREACH_PRECEDENCE_CUTOFF
#define     ICMP_UNREACH_PRECEDENCE_CUTOFF  15
#endif
#ifndef     ICMP_REDIRECT_NET
#define     ICMP_REDIRECT_NET               0
#endif
#ifndef     ICMP_REDIRECT_HOST
#define     ICMP_REDIRECT_HOST              1
#endif
#ifndef     ICMP_REDIRECT_TOSNET
#define     ICMP_REDIRECT_TOSNET            2
#endif
#ifndef     ICMP_REDIRECT_TOSHOST
#define     ICMP_REDIRECT_TOSHOST           3
#endif
#ifndef     ICMP_TIMXCEED_INTRANS
#define     ICMP_TIMXCEED_INTRANS           0
#endif
#ifndef     ICMP_TIMXCEED_REASS
#define     ICMP_TIMXCEED_REASS             1
#endif
#ifndef     ICMP_PARAMPROB_OPTABSENT
#define     ICMP_PARAMPROB_OPTABSENT        1
#endif

    u_short icmp_sum;

    union
    {
        struct
        {
            u_short id;
            u_short seq;
        }echo;

#undef icmp_id
#undef icmp_seq
#define icmp_id     hun.echo.id
#define icmp_seq    hun.echo.seq
 
        u_long gateway;
        struct
        {
            u_short pad;
            u_short mtu;
        }frag;
    }hun;
    union
    {
        struct
        {
            n_time its_otime;
            n_time its_rtime;
            n_time its_ttime;
        }ts;
        struct
        {
            struct ip idi_ip;
            /* options and then 64 bits of data */
        }ip;
        u_long mask;
        char data[1];

#undef icmp_mask
#define icmp_mask    dun.mask
#undef icmp_data
#define icmp_data    dun.data

#undef icmp_otime
#define icmp_otime   dun.ts.its_otime
#undef icmp_rtime
#define icmp_rtime   dun.ts.its_rtime
#undef icmp_ttime
#define icmp_ttime   dun.ts.its_ttime
    }dun;
};


/*
 *  IGMP header.
 */
struct libnet_igmp_hdr
{
    u_char igmp_type;
#ifndef IGMP_MEMBERSHIP_QUERY
#define IGMP_MEMBERSHIP_QUERY           0x11    /* membership query */
#endif
#ifndef IGMP_V1_MEMBERSHIP_REPORT
#define IGMP_V1_MEMBERSHIP_REPORT       0x12    /* Ver. 1 membership report */
#endif
#ifndef IGMP_V2_MEMBERSHIP_REPORT
#define IGMP_V2_MEMBERSHIP_REPORT       0x16    /* Ver. 2 membership report */
#endif
#ifndef IGMP_LEAVE_GROUP
#define IGMP_LEAVE_GROUP                0x17    /* Leave-group message */
#endif
    u_char igmp_code;
    u_short igmp_sum;
    struct in_addr igmp_group;
};


/* 
 *  Ethernet packet header prototype.  Too many O/S's define this differently.
 *  Easy enough to solve that and define it here.
 */
struct libnet_ethernet_hdr
{
#ifndef ETHER_ADDR_LEN
#define ETHER_ADDR_LEN 6
#endif
    u_char  ether_dhost[ETHER_ADDR_LEN];    /* destination ethernet address */
    u_char  ether_shost[ETHER_ADDR_LEN];    /* source ethernet address */
    u_short ether_type;                     /* packet type ID */
};

#define ETHERTYPE_PUP           0x0200  /* PUP protocol */
#define ETHERTYPE_IP            0x0800  /* IP protocol */
#define ETHERTYPE_ARP           0x0806  /* Addr. resolution protocol */
#define ETHERTYPE_REVARP        0x8035  /* reverse Addr. resolution protocol */
#define ETHERTYPE_VLAN          0x8100  /* IEEE 802.1Q VLAN tagging */
#define ETHERTYPE_LOOPBACK      0x9000  /* used to test interfaces */

#if (!__GLIBC__)
struct ether_addr
{
    u_char  ether_addr_octet[6];
};
#endif

/* 
 *  ARP packet header prototype.  Too many O/S's define this differently.
 *  Easy enough to solve that and define it here.
 */
struct libnet_arp_hdr
{
    u_short ar_hrd;                         /* format of hardware address */
#define ARPHRD_ETHER     1                  /* ethernet hardware format */
    u_short ar_pro;                         /* format of protocol address */
    u_char  ar_hln;                         /* length of hardware address */
    u_char  ar_pln;                         /* length of protocol addres */
    u_short ar_op;                          /* operation type */
#define ARPOP_REQUEST    1                  /* req to resolve address */
#define ARPOP_REPLY      2                  /* resp to previous request */
#define ARPOP_REVREQUEST 3                  /* req protocol address given hardware */
#define ARPOP_REVREPLY   4                  /* resp giving protocol address */
#define ARPOP_INVREQUEST 8                  /* req to identify peer */
#define ARPOP_INVREPLY   9                  /* resp identifying peer */

    /*
     *  These should implementation defined but I've hardcoded eth/IP.
     */
    u_char ar_sha[6];                         /* sender hardware address */
    u_char ar_spa[4];                         /* sender protocol address */
    u_char ar_tha[6];                         /* target hardware address */
    u_char ar_tpa[4];                         /* target protocol address */
};


/*
 *  Base DNS header.
 */
struct libnet_dns_hdr
{
    u_short id;             /* DNS packet ID */
    u_short flags;          /* DNS flags */
    u_short num_q;          /* Number of questions */
    u_short num_answ_rr;    /* Number of answer resource records */
    u_short num_auth_rr;    /* Number of authority resource records */
    u_short num_addi_rr;    /* Number of additional resource records */
};


/*
 *  Base RIP (routing information protocol) header.
 */
struct libnet_rip_hdr
{
    u_char cmd;             /* RIP command */
#define RIPCMD_REQUEST      1   /* want info */
#define RIPCMD_RESPONSE     2   /* responding to request */
#define RIPCMD_TRACEON      3   /* turn tracing on */
#define RIPCMD_TRACEOFF     4   /* turn it off */
#define RIPCMD_POLL         5   /* like request, but anyone answers */
#define RIPCMD_POLLENTRY    6   /* like poll, but for entire entry */
#define RIPCMD_MAX          7
    u_char ver;             /* RIP version */
#define RIPVER_0            0
#define RIPVER_1            1
#define RIPVER_2            2
    u_short rd;             /* Zero (v1) or Routing Domain (v2) */
    u_short af;             /* Address family */
    u_short rt;             /* Zero (v1) or Route Tag (v2) */
    u_long addr;            /* IP address */
    u_long mask;            /* Zero (v1) or Subnet Mask (v2) */
    u_long next_hop;        /* Zero (v1) or Next hop IP address (v2) */
    u_long metric;          /* Metric */
};


#if 0
struct libnet_snmp_hdr
{
    /* ASN.1 BER support first */
};
#endif


/*
 *  TCP options structure.
 */
struct tcpoption
{
    u_char tcpopt_list[MAX_IPOPTLEN];
};


#if (__linux__  || WIN32)
/*
 *  Linux has a radically different IP options structure from BSD.
 */
struct ipoption
{
    struct  in_addr ipopt_dst;          /* first-hop dst if source routed */
    char ipopt_list[MAX_IPOPTLEN];      /* options proper */
};
#endif

#endif  /* __LIBNET_HEADERS_H */

/* EOF */