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   1 /* Cisco IGRP definitions */
   2
   3 /* IGRP Header */
   4
   5 struct igrphdr {
   6         u_int8_t ig_vop;        /* protocol version number / opcode */
   7 #define IGRP_V(x)       (((x) & 0xf0) >> 4)
   8 #define IGRP_OP(x)      ((x) & 0x0f)
   9         u_int8_t ig_ed;         /* edition number */
  10         u_int16_t ig_as;        /* autonomous system number */
  11         u_int16_t ig_ni;        /* number of subnet in local net */
  12         u_int16_t ig_ns;        /* number of networks in AS */
  13         u_int16_t ig_nx;        /* number of networks ouside AS */
  14         u_int16_t ig_sum;       /* checksum of IGRP header & data */
  15 };
  16
  17 #define IGRP_UPDATE     1
  18 #define IGRP_REQUEST    2
  19
  20 /* IGRP routing entry */
  21
  22 struct igrprte {
  23         u_int8_t igr_net[3];    /* 3 significant octets of IP address */
  24         u_int8_t igr_dly[3];    /* delay in tens of microseconds */
  25         u_int8_t igr_bw[3];     /* bandwidth in units of 1 kb/s */
  26         u_int8_t igr_mtu[2];    /* MTU in octets */
  27         u_int8_t igr_rel;       /* percent packets successfully tx/rx */
  28         u_int8_t igr_ld;        /* percent of channel occupied */
  29         u_int8_t igr_hct;       /* hop count */
  30 };
  31
  32 #define IGRP_RTE_SIZE   14      /* don't believe sizeof ! */