1/*	$OpenBSD: print-igrp.c,v 1.9 2020/01/24 22:46:36 procter Exp $	*/
2
3/*
4 * Copyright (c) 1996, 1997
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that: (1) source code distributions
9 * retain the above copyright notice and this paragraph in its entirety, (2)
10 * distributions including binary code include the above copyright notice and
11 * this paragraph in its entirety in the documentation or other materials
12 * provided with the distribution, and (3) all advertising materials mentioning
13 * features or use of this software display the following acknowledgement:
14 * ``This product includes software developed by the University of California,
15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16 * the University nor the names of its contributors may be used to endorse
17 * or promote products derived from this software without specific prior
18 * written permission.
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 *
23 * Initial contribution from Francis Dupont (francis.dupont@inria.fr)
24 */
25
26#include <sys/types.h>			/* concession to AIX */
27#include <sys/socket.h>
28
29#include <netinet/in.h>
30#include <netinet/ip.h>
31#include <netinet/ip_var.h>
32#include <netinet/udp.h>
33#include <netinet/udp_var.h>
34
35#include <errno.h>
36#include <stdio.h>
37
38#include "interface.h"
39#include "addrtoname.h"
40#include "igrp.h"
41#include "extract.h"			/* must come after interface.h */
42
43static void
44igrp_entry_print(struct igrprte *igr, int is_interior, int is_exterior)
45{
46	u_int delay, bandwidth;
47	u_int metric, mtu;
48
49	if (is_interior)
50		printf(" *.%d.%d.%d", igr->igr_net[0],
51		    igr->igr_net[1], igr->igr_net[2]);
52	else if (is_exterior)
53		printf(" X%d.%d.%d.0", igr->igr_net[0],
54		    igr->igr_net[1], igr->igr_net[2]);
55	else
56		printf(" %d.%d.%d.0", igr->igr_net[0],
57		    igr->igr_net[1], igr->igr_net[2]);
58
59	delay = EXTRACT_24BITS(igr->igr_dly);
60	bandwidth = EXTRACT_24BITS(igr->igr_bw);
61	metric = bandwidth + delay;
62	if (metric > 0xffffff)
63		metric = 0xffffff;
64	mtu = EXTRACT_16BITS(igr->igr_mtu);
65
66	printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
67	    10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
68	    igr->igr_rel, igr->igr_ld, metric,
69	    mtu, igr->igr_hct);
70}
71
72static struct tok op2str[] = {
73	{ IGRP_UPDATE,		"update" },
74	{ IGRP_REQUEST,		"request" },
75	{ 0,			NULL }
76};
77
78void
79igrp_print(const u_char *bp, u_int length, const u_char *bp2)
80{
81	struct igrphdr *hdr;
82	struct ip *ip;
83	u_char *cp;
84	u_int nint, nsys, next;
85
86	hdr = (struct igrphdr *)bp;
87	ip = (struct ip *)bp2;
88	cp = (u_char *)(hdr + 1);
89	printf("%s > %s: igrp: ",
90	    ipaddr_string(&ip->ip_src),
91	    ipaddr_string(&ip->ip_dst));
92
93	/* Header */
94	TCHECK(*hdr);
95	nint = EXTRACT_16BITS(&hdr->ig_ni);
96	nsys = EXTRACT_16BITS(&hdr->ig_ns);
97	next = EXTRACT_16BITS(&hdr->ig_nx);
98
99	printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
100	    tok2str(op2str, "op-#%d", hdr->ig_op),
101	    hdr->ig_v,
102	    hdr->ig_ed,
103	    EXTRACT_16BITS(&hdr->ig_as),
104	    nint,
105	    nsys,
106	    next);
107
108	length -= sizeof(*hdr);
109	while (length >= IGRP_RTE_SIZE) {
110		if (nint > 0) {
111			TCHECK2(*cp, IGRP_RTE_SIZE);
112			igrp_entry_print((struct igrprte *)cp, 1, 0);
113			--nint;
114		} else if (nsys > 0) {
115			TCHECK2(*cp, IGRP_RTE_SIZE);
116			igrp_entry_print((struct igrprte *)cp, 0, 0);
117			--nsys;
118		} else if (next > 0) {
119			TCHECK2(*cp, IGRP_RTE_SIZE);
120			igrp_entry_print((struct igrprte *)cp, 0, 1);
121			--next;
122		} else {
123			printf("[extra bytes %d]", length);
124			break;
125		}
126		cp += IGRP_RTE_SIZE;
127		length -= IGRP_RTE_SIZE;
128	}
129	if (nint == 0 && nsys == 0 && next == 0)
130		return;
131trunc:
132	printf("[|igrp]");
133}
134