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      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