1/* @(#) $Header: /tcpdump/master/tcpdump/igrp.h,v 1.6 2002-12-11 07:13:52 guy Exp $ (LBL) */
2/* Cisco IGRP definitions */
3
4/* IGRP Header */
5
6struct igrphdr {
7	u_int8_t ig_vop;	/* protocol version number / opcode */
8#define IGRP_V(x)	(((x) & 0xf0) >> 4)
9#define IGRP_OP(x)	((x) & 0x0f)
10	u_int8_t ig_ed;		/* edition number */
11	u_int16_t ig_as;	/* autonomous system number */
12	u_int16_t ig_ni;	/* number of subnet in local net */
13	u_int16_t ig_ns;	/* number of networks in AS */
14	u_int16_t ig_nx;	/* number of networks ouside AS */
15	u_int16_t ig_sum;	/* checksum of IGRP header & data */
16};
17
18#define IGRP_UPDATE	1
19#define IGRP_REQUEST	2
20
21/* IGRP routing entry */
22
23struct igrprte {
24	u_int8_t igr_net[3];	/* 3 significant octets of IP address */
25	u_int8_t igr_dly[3];	/* delay in tens of microseconds */
26	u_int8_t igr_bw[3];	/* bandwidth in units of 1 kb/s */
27	u_int8_t igr_mtu[2];	/* MTU in octets */
28	u_int8_t igr_rel;	/* percent packets successfully tx/rx */
29	u_int8_t igr_ld;	/* percent of channel occupied */
30	u_int8_t igr_hct;	/* hop count */
31};
32
33#define IGRP_RTE_SIZE	14	/* don't believe sizeof ! */
34