contrib/tcpdump/igrp.h

   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 ! */