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
43 static void
igrp_entry_print(struct igrprte * igr,int is_interior,int is_exterior)44 igrp_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
72 static struct tok op2str[] = {
73 { IGRP_UPDATE, "update" },
74 { IGRP_REQUEST, "request" },
75 { 0, NULL }
76 };
77
78 void
igrp_print(const u_char * bp,u_int length,const u_char * bp2)79 igrp_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;
131 trunc:
132 printf("[|igrp]");
133 }
134