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