34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/* @(#) $Header: /tcpdump/master/tcpdump/igrp.h,v 1.4 2000/12/17 23:07:49 guy Exp $ (LBL) */
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/* Cisco IGRP definitions */
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/* IGRP Header */
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struct igrphdr {
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u_int8_t ig_vop; /* protocol version number / opcode */
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#define IGRP_V(x) (((x) & 0xf0) >> 4)
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#define IGRP_OP(x) ((x) & 0x0f)
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u_int8_t ig_ed; /* edition number */
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u_int16_t ig_as; /* autonomous system number */
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u_int16_t ig_ni; /* number of subnet in local net */
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u_int16_t ig_ns; /* number of networks in AS */
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u_int16_t ig_nx; /* number of networks ouside AS */
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u_int16_t ig_sum; /* checksum of IGRP header & data */
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};
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#define IGRP_UPDATE 1
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#define IGRP_REQUEST 2
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/* IGRP routing entry */
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struct igrprte {
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u_int8_t igr_net[3]; /* 3 significant octets of IP address */
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u_int8_t igr_dly[3]; /* delay in tens of microseconds */
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u_int8_t igr_bw[3]; /* bandwidth in units of 1 kb/s */
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u_int8_t igr_mtu[2]; /* MTU in octets */
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u_int8_t igr_rel; /* percent packets successfully tx/rx */
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u_int8_t igr_ld; /* percent of channel occupied */
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u_int8_t igr_hct; /* hop count */
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};
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#define IGRP_RTE_SIZE 14 /* don't believe sizeof ! */
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