igrp.h revision 17680 
1/* Cisco IGRP definitions */
2
3/* IGRP Header */
4
5struct igrphdr {
6#if BYTE_ORDER == LITTLE_ENDIAN
7	u_char ig_op:4;		/* opcode */
8	u_char ig_v:4;		/* protocol version number */
9#else
10	u_char ig_v:4;		/* protocol version number */
11	u_char ig_op:4;		/* opcode */
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
26struct 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 ! */
37