1/*
2 * Copyright (c) 1996, 1997
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Initial contribution from Francis Dupont (francis.dupont@inria.fr)
22 */
23
24#ifndef lint
25static const char rcsid[] _U_ =
26    "@(#) $Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.21 2005-04-20 21:01:56 guy Exp $ (LBL)";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <tcpdump-stdinc.h>
34
35#include <stdio.h>
36
37#include "interface.h"
38#include "addrtoname.h"
39#include "igrp.h"
40#include "ip.h"
41#include "extract.h"			/* must come after interface.h */
42
43static void
44igrp_entry_print(register struct igrprte *igr, register int is_interior,
45    register int is_exterior)
46{
47	register u_int delay, bandwidth;
48	u_int metric, mtu;
49
50	if (is_interior)
51		printf(" *.%d.%d.%d", igr->igr_net[0],
52		    igr->igr_net[1], igr->igr_net[2]);
53	else if (is_exterior)
54		printf(" X%d.%d.%d.0", igr->igr_net[0],
55		    igr->igr_net[1], igr->igr_net[2]);
56	else
57		printf(" %d.%d.%d.0", igr->igr_net[0],
58		    igr->igr_net[1], igr->igr_net[2]);
59
60	delay = EXTRACT_24BITS(igr->igr_dly);
61	bandwidth = EXTRACT_24BITS(igr->igr_bw);
62	metric = bandwidth + delay;
63	if (metric > 0xffffff)
64		metric = 0xffffff;
65	mtu = EXTRACT_16BITS(igr->igr_mtu);
66
67	printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
68	    10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
69	    igr->igr_rel, igr->igr_ld, metric,
70	    mtu, igr->igr_hct);
71}
72
73static const struct tok op2str[] = {
74	{ IGRP_UPDATE,		"update" },
75	{ IGRP_REQUEST,		"request" },
76	{ 0,			NULL }
77};
78
79void
80igrp_print(register const u_char *bp, u_int length, const u_char *bp2 _U_)
81{
82	register struct igrphdr *hdr;
83	register u_char *cp;
84	u_int nint, nsys, next;
85
86	hdr = (struct igrphdr *)bp;
87	cp = (u_char *)(hdr + 1);
88        (void)printf("igrp:");
89
90	/* Header */
91	TCHECK(*hdr);
92	nint = EXTRACT_16BITS(&hdr->ig_ni);
93	nsys = EXTRACT_16BITS(&hdr->ig_ns);
94	next = EXTRACT_16BITS(&hdr->ig_nx);
95
96	(void)printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
97	    tok2str(op2str, "op-#%d", IGRP_OP(hdr->ig_vop)),
98	    IGRP_V(hdr->ig_vop),
99	    hdr->ig_ed,
100	    EXTRACT_16BITS(&hdr->ig_as),
101	    nint,
102	    nsys,
103	    next);
104
105	length -= sizeof(*hdr);
106	while (length >= IGRP_RTE_SIZE) {
107		if (nint > 0) {
108			TCHECK2(*cp, IGRP_RTE_SIZE);
109			igrp_entry_print((struct igrprte *)cp, 1, 0);
110			--nint;
111		} else if (nsys > 0) {
112			TCHECK2(*cp, IGRP_RTE_SIZE);
113			igrp_entry_print((struct igrprte *)cp, 0, 0);
114			--nsys;
115		} else if (next > 0) {
116			TCHECK2(*cp, IGRP_RTE_SIZE);
117			igrp_entry_print((struct igrprte *)cp, 0, 1);
118			--next;
119		} else {
120			(void)printf(" [extra bytes %d]", length);
121			break;
122		}
123		cp += IGRP_RTE_SIZE;
124		length -= IGRP_RTE_SIZE;
125	}
126	if (nint == 0 && nsys == 0 && next == 0)
127		return;
128trunc:
129	fputs(" [|igrp]", stdout);
130}
131