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   1 /* Cisco IGRP definitions */
   2
   3 /* IGRP Header */
   4
   5 struct igrphdr {
   6 #ifdef WORDS_BIGENDIAN
   7         u_char ig_v:4;          /* protocol version number */
   8         u_char ig_op:4;         /* opcode */
   9 #else
  10         u_char ig_op:4;         /* opcode */
  11         u_char ig_v:4;          /* protocol version number */
  12 #endif
  13         u_char ig_ed;           /* edition number */
  14         u_short ig_as;          /* autonomous system number */
  15         u_short ig_ni;          /* number of subnet in local net */
  16         u_short ig_ns;          /* number of networks in AS */
  17         u_short ig_nx;          /* number of networks ouside AS */
  18         u_short ig_sum;         /* checksum of IGRP header & data */
  19 };
  20
  21 #define IGRP_UPDATE     1
  22 #define IGRP_REQUEST    2
  23
  24 /* IGRP routing entry */
  25
  26 struct igrprte {
  27         u_char igr_net[3];      /* 3 significant octets of IP address */
  28         u_char igr_dly[3];      /* delay in tens of microseconds */
  29         u_char igr_bw[3];       /* bandwidth in units of 1 kb/s */
  30         u_char igr_mtu[2];      /* MTU in octets */
  31         u_char igr_rel;         /* percent packets successfully tx/rx */
  32         u_char igr_ld;          /* percent of channel occupied */
  33         u_char igr_hct;         /* hop count */
  34 };
  35
  36 #define IGRP_RTE_SIZE   14      /* don't believe sizeof ! */