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/* $OpenBSD: igrp.h,v 1.5 2022/12/28 21:30:19 jmc Exp $ */
/* Cisco IGRP definitions */
/* IGRP Header */
struct igrphdr {
#ifdef WORDS_BIGENDIAN
u_char ig_v:4; /* protocol version number */
u_char ig_op:4; /* opcode */
#else
u_char ig_op:4; /* opcode */
u_char ig_v:4; /* protocol version number */
#endif
u_char ig_ed; /* edition number */
u_short ig_as; /* autonomous system number */
u_short ig_ni; /* number of subnet in local net */
u_short ig_ns; /* number of networks in AS */
u_short ig_nx; /* number of networks outside AS */
u_short ig_sum; /* checksum of IGRP header & data */
};
#define IGRP_UPDATE 1
#define IGRP_REQUEST 2
/* IGRP routing entry */
struct igrprte {
u_char igr_net[3]; /* 3 significant octets of IP address */
u_char igr_dly[3]; /* delay in tens of microseconds */
u_char igr_bw[3]; /* bandwidth in units of 1 kb/s */
u_char igr_mtu[2]; /* MTU in octets */
u_char igr_rel; /* percent packets successfully tx/rx */
u_char igr_ld; /* percent of channel occupied */
u_char igr_hct; /* hop count */
};
#define IGRP_RTE_SIZE 14 /* don't believe sizeof ! */
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