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/* @(#) $Header: /tcpdump/master/tcpdump/igrp.h,v 1.6 2002-12-11 07:13:52 guy Exp $ (LBL) */
/* Cisco IGRP definitions */
/* IGRP Header */
struct igrphdr {
u_int8_t ig_vop; /* protocol version number / opcode */
#define IGRP_V(x) (((x) & 0xf0) >> 4)
#define IGRP_OP(x) ((x) & 0x0f)
u_int8_t ig_ed; /* edition number */
u_int16_t ig_as; /* autonomous system number */
u_int16_t ig_ni; /* number of subnet in local net */
u_int16_t ig_ns; /* number of networks in AS */
u_int16_t ig_nx; /* number of networks ouside AS */
u_int16_t ig_sum; /* checksum of IGRP header & data */
};
#define IGRP_UPDATE 1
#define IGRP_REQUEST 2
/* IGRP routing entry */
struct igrprte {
u_int8_t igr_net[3]; /* 3 significant octets of IP address */
u_int8_t igr_dly[3]; /* delay in tens of microseconds */
u_int8_t igr_bw[3]; /* bandwidth in units of 1 kb/s */
u_int8_t igr_mtu[2]; /* MTU in octets */
u_int8_t igr_rel; /* percent packets successfully tx/rx */
u_int8_t igr_ld; /* percent of channel occupied */
u_int8_t igr_hct; /* hop count */
};
#define IGRP_RTE_SIZE 14 /* don't believe sizeof ! */
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