1 /* $OpenBSD: print-rt6.c,v 1.10 2022/12/28 21:30:19 jmc Exp $ */
2
3
4 /*
5 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that: (1) source code distributions
10 * retain the above copyright notice and this paragraph in its entirety, (2)
11 * distributions including binary code include the above copyright notice and
12 * this paragraph in its entirety in the documentation or other materials
13 * provided with the distribution, and (3) all advertising materials mentioning
14 * features or use of this software display the following acknowledgement:
15 * ``This product includes software developed by the University of California,
16 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
17 * the University nor the names of its contributors may be used to endorse
18 * or promote products derived from this software without specific prior
19 * written permission.
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 */
24
25 #include <sys/time.h>
26 #include <sys/types.h>
27 #include <sys/socket.h>
28
29 #include <net/if.h>
30
31 #include <netinet/in.h>
32 #include <netinet/if_ether.h>
33 #include <netinet/ip.h>
34 #include <netinet/ip_icmp.h>
35 #include <netinet/ip_var.h>
36 #include <netinet/udp.h>
37 #include <netinet/udp_var.h>
38 #include <netinet/tcp.h>
39
40 #include <stdio.h>
41
42 #include <netinet/ip6.h>
43
44 #include "interface.h"
45 #include "addrtoname.h"
46
47 int
rt6_print(const u_char * bp,const u_char * bp2)48 rt6_print(const u_char *bp, const u_char *bp2)
49 {
50 const struct ip6_rthdr *dp;
51 const struct ip6_rthdr0 *dp0;
52 const u_char *ep;
53 int i, len;
54
55 dp = (struct ip6_rthdr *)bp;
56 len = dp->ip6r_len;
57
58 /* 'ep' points to the end of available data. */
59 ep = snapend;
60
61 #if 0
62 printf("%s > %s: ",
63 ip6addr_string(&ip->ip6_src),
64 ip6addr_string(&ip->ip6_dst));
65 #endif
66
67 TCHECK(dp->ip6r_segleft);
68
69 printf("srcrt (len=%d, ", dp->ip6r_len);
70 printf("type=%d, ", dp->ip6r_type);
71 printf("segleft=%d", dp->ip6r_segleft);
72
73 switch (dp->ip6r_type) {
74 case IPV6_RTHDR_TYPE_0:
75 dp0 = (struct ip6_rthdr0 *)dp;
76
77 TCHECK(dp0->ip6r0_reserved);
78 if (dp0->ip6r0_reserved || vflag) {
79 printf(", rsv=0x%0x",
80 (u_int32_t)ntohl(dp0->ip6r0_reserved));
81 }
82
83 if (len % 2 == 1)
84 goto trunc;
85 len >>= 1;
86 for (i = 0; i < len; i++) {
87 struct in6_addr *addr;
88
89 addr = ((struct in6_addr *)(dp0 + 1)) + i;
90 if ((u_char *)addr > ep - sizeof(*addr))
91 goto trunc;
92
93 printf(", [%d]%s", i, ip6addr_string((u_char *)addr));
94 }
95 printf(")");
96 return((dp0->ip6r0_len + 1) << 3);
97 default:
98 if (bp + ((dp->ip6r_len + 1) << 3) > ep)
99 goto trunc;
100 printf(")");
101 return((dp->ip6r_len + 1) << 3);
102 }
103
104 trunc:
105 printf(", [|srcrt]");
106 return 65535; /* XXX */
107 }
108