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#include <sys/cdefs.h>
25#ifndef lint
26#if 0
27static const char rcsid[] _U_ =
28    "@(#) Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.21 2005-04-20 21:01:56 guy Exp (LBL)";
29#else
30__RCSID("$NetBSD: print-igrp.c,v 1.2 2010/12/05 05:11:30 christos Exp $");
31#endif
32#endif
33
34#ifdef HAVE_CONFIG_H
35#include "config.h"
36#endif
37
38#include <tcpdump-stdinc.h>
39
40#include <stdio.h>
41
42#include "interface.h"
43#include "addrtoname.h"
44#include "igrp.h"
45#include "ip.h"
46#include "extract.h"			/* must come after interface.h */
47
48static void
49igrp_entry_print(register struct igrprte *igr, register int is_interior,
50    register int is_exterior)
51{
52	register u_int delay, bandwidth;
53	u_int metric, mtu;
54
55	if (is_interior)
56		printf(" *.%d.%d.%d", igr->igr_net[0],
57		    igr->igr_net[1], igr->igr_net[2]);
58	else if (is_exterior)
59		printf(" X%d.%d.%d.0", igr->igr_net[0],
60		    igr->igr_net[1], igr->igr_net[2]);
61	else
62		printf(" %d.%d.%d.0", igr->igr_net[0],
63		    igr->igr_net[1], igr->igr_net[2]);
64
65	delay = EXTRACT_24BITS(igr->igr_dly);
66	bandwidth = EXTRACT_24BITS(igr->igr_bw);
67	metric = bandwidth + delay;
68	if (metric > 0xffffff)
69		metric = 0xffffff;
70	mtu = EXTRACT_16BITS(igr->igr_mtu);
71
72	printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
73	    10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
74	    igr->igr_rel, igr->igr_ld, metric,
75	    mtu, igr->igr_hct);
76}
77
78static struct tok op2str[] = {
79	{ IGRP_UPDATE,		"update" },
80	{ IGRP_REQUEST,		"request" },
81	{ 0,			NULL }
82};
83
84void
85igrp_print(register const u_char *bp, u_int length, const u_char *bp2 _U_)
86{
87	register struct igrphdr *hdr;
88	register u_char *cp;
89	u_int nint, nsys, next;
90
91	hdr = (struct igrphdr *)bp;
92	cp = (u_char *)(hdr + 1);
93        (void)printf("igrp:");
94
95	/* Header */
96	TCHECK(*hdr);
97	nint = EXTRACT_16BITS(&hdr->ig_ni);
98	nsys = EXTRACT_16BITS(&hdr->ig_ns);
99	next = EXTRACT_16BITS(&hdr->ig_nx);
100
101	(void)printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
102	    tok2str(op2str, "op-#%d", IGRP_OP(hdr->ig_vop)),
103	    IGRP_V(hdr->ig_vop),
104	    hdr->ig_ed,
105	    EXTRACT_16BITS(&hdr->ig_as),
106	    nint,
107	    nsys,
108	    next);
109
110	length -= sizeof(*hdr);
111	while (length >= IGRP_RTE_SIZE) {
112		if (nint > 0) {
113			TCHECK2(*cp, IGRP_RTE_SIZE);
114			igrp_entry_print((struct igrprte *)cp, 1, 0);
115			--nint;
116		} else if (nsys > 0) {
117			TCHECK2(*cp, IGRP_RTE_SIZE);
118			igrp_entry_print((struct igrprte *)cp, 0, 0);
119			--nsys;
120		} else if (next > 0) {
121			TCHECK2(*cp, IGRP_RTE_SIZE);
122			igrp_entry_print((struct igrprte *)cp, 0, 1);
123			--next;
124		} else {
125			(void)printf(" [extra bytes %d]", length);
126			break;
127		}
128		cp += IGRP_RTE_SIZE;
129		length -= IGRP_RTE_SIZE;
130	}
131	if (nint == 0 && nsys == 0 && next == 0)
132		return;
133trunc:
134	fputs(" [|igrp]", stdout);
135}
136