icmp_hdr.h

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/*
server/ip/gen/icmp_hdr.h
*/

#ifndef __SERVER__IP__GEN__ICMP_HDR_H__
#define __SERVER__IP__GEN__ICMP_HDR_H__

typedef struct icmp_id_seq
{
        u16_t   iis_id, iis_seq;
} icmp_id_seq_t;

typedef struct icmp_ip_id
{
        ip_hdr_t iii_hdr;
        /* ip_hdr_options and 64 bytes of data */
} icmp_ip_id_t;

typedef struct icmp_ram         /* RFC 1256 */
{
        u8_t    iram_na;
        u8_t    iram_aes;
        u16_t   iram_lt;
} icmp_ram_t;

typedef struct icmp_pp
{
        u8_t    ipp_ptr;
        u8_t    ipp_unused[3];
} icmp_pp_t;

typedef struct icmp_mtu         /* RFC 1191 */
{
        u16_t   im_unused;
        u16_t   im_mtu;
} icmp_mtu_t;

typedef struct icmp_hdr
{
        u8_t ih_type, ih_code;
        u16_t ih_chksum;
        union
        {
                u32_t ihh_unused;
                icmp_id_seq_t ihh_idseq;
                ipaddr_t ihh_gateway;
                icmp_ram_t ihh_ram;
                icmp_pp_t ihh_pp;
                icmp_mtu_t ihh_mtu;
        } ih_hun;
        union
        {
                icmp_ip_id_t ihd_ipid;
                u8_t uhd_data[1];
        } ih_dun;
} icmp_hdr_t;

#endif /* __SERVER__IP__GEN__ICMP_HDR_H__ */

/*
 * $PchId: icmp_hdr.h,v 1.5 2002/06/10 07:10:48 philip Exp $
 */

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