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 
6 struct 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 
23 struct 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