print-igrp.c revision 56893 
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[] =
26    "@(#) $Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.11 1999/11/21 09:36:53 fenner Exp $ (LBL)";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <sys/param.h>
34#include <sys/types.h>			/* concession to AIX */
35#include <sys/socket.h>
36
37#include <netinet/in.h>
38#include <netinet/in_systm.h>
39#include <netinet/ip.h>
40#include <netinet/ip_var.h>
41#include <netinet/udp.h>
42#include <netinet/udp_var.h>
43
44#include <errno.h>
45#include <stdio.h>
46
47#include "interface.h"
48#include "addrtoname.h"
49#include "igrp.h"
50#include "extract.h"			/* must come after interface.h */
51
52static void
53igrp_entry_print(register struct igrprte *igr, register int is_interior,
54    register int is_exterior)
55{
56	register u_int delay, bandwidth;
57	u_int metric, mtu;
58
59	if (is_interior)
60		printf(" *.%d.%d.%d", igr->igr_net[0],
61		    igr->igr_net[1], igr->igr_net[2]);
62	else if (is_exterior)
63		printf(" X%d.%d.%d.0", igr->igr_net[0],
64		    igr->igr_net[1], igr->igr_net[2]);
65	else
66		printf(" %d.%d.%d.0", igr->igr_net[0],
67		    igr->igr_net[1], igr->igr_net[2]);
68
69	delay = EXTRACT_24BITS(igr->igr_dly);
70	bandwidth = EXTRACT_24BITS(igr->igr_bw);
71	metric = bandwidth + delay;
72	if (metric > 0xffffff)
73		metric = 0xffffff;
74	mtu = EXTRACT_16BITS(igr->igr_mtu);
75
76	printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
77	    10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
78	    igr->igr_rel, igr->igr_ld, metric,
79	    mtu, igr->igr_hct);
80}
81
82static struct tok op2str[] = {
83	{ IGRP_UPDATE,		"update" },
84	{ IGRP_REQUEST,		"request" },
85	{ 0,			NULL }
86};
87
88void
89igrp_print(register const u_char *bp, u_int length, register const u_char *bp2)
90{
91	register struct igrphdr *hdr;
92	register struct ip *ip;
93	register u_char *cp;
94	u_int nint, nsys, next;
95
96	hdr = (struct igrphdr *)bp;
97	ip = (struct ip *)bp2;
98	cp = (u_char *)(hdr + 1);
99        (void)printf("%s > %s: igrp: ",
100	    ipaddr_string(&ip->ip_src),
101	    ipaddr_string(&ip->ip_dst));
102
103	/* Header */
104	TCHECK(*hdr);
105	nint = EXTRACT_16BITS(&hdr->ig_ni);
106	nsys = EXTRACT_16BITS(&hdr->ig_ns);
107	next = EXTRACT_16BITS(&hdr->ig_nx);
108
109	(void)printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
110	    tok2str(op2str, "op-#%d", hdr->ig_op),
111	    hdr->ig_v,
112	    hdr->ig_ed,
113	    EXTRACT_16BITS(&hdr->ig_as),
114	    nint,
115	    nsys,
116	    next);
117
118	length -= sizeof(*hdr);
119	while (length >= IGRP_RTE_SIZE) {
120		if (nint > 0) {
121			TCHECK2(*cp, IGRP_RTE_SIZE);
122			igrp_entry_print((struct igrprte *)cp, 1, 0);
123			--nint;
124		} else if (nsys > 0) {
125			TCHECK2(*cp, IGRP_RTE_SIZE);
126			igrp_entry_print((struct igrprte *)cp, 0, 0);
127			--nsys;
128		} else if (next > 0) {
129			TCHECK2(*cp, IGRP_RTE_SIZE);
130			igrp_entry_print((struct igrprte *)cp, 0, 1);
131			--next;
132		} else {
133			(void)printf("[extra bytes %d]", length);
134			break;
135		}
136		cp += IGRP_RTE_SIZE;
137		length -= IGRP_RTE_SIZE;
138	}
139	if (nint == 0 && nsys == 0 && next == 0)
140		return;
141trunc:
142	fputs("[|igrp]", stdout);
143}
144