1/*	$OpenBSD: print-ip6opts.c,v 1.8 2022/01/05 05:46:18 dlg Exp $	*/
2
3/*
4 * Copyright (C) 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/time.h>
33#include <sys/types.h>
34#include <sys/socket.h>
35
36#include <netinet/in.h>
37#include <netinet/ip6.h>
38
39#include <stdio.h>
40
41#include "interface.h"
42#include "addrtoname.h"
43
44void
45ip6_opt_print(const u_char *bp, int len)
46{
47    int i;
48    int optlen;
49
50    for (i = 0; i < len; i += optlen) {
51	switch (bp[i]) {
52	case IP6OPT_PAD1:
53	    optlen = 1;
54	    break;
55	case IP6OPT_PADN:
56	    if (len - i < IP6OPT_MINLEN) {
57		printf("(padn: trunc)");
58		goto trunc;
59	    }
60	    optlen = bp[i + 1] + 2;
61	    break;
62	case IP6OPT_ROUTER_ALERT:
63	    if (len - i < IP6OPT_RTALERT_LEN) {
64		printf("(rtalert: trunc)");
65		goto trunc;
66	    }
67	    if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
68		printf("(rtalert: invalid len %d)", bp[i + 1]);
69		goto trunc;
70	    }
71	    printf("(rtalert: 0x%04x) ", ntohs(*(u_short *)&bp[i + 2]));
72	    optlen = IP6OPT_RTALERT_LEN;
73	    break;
74	case IP6OPT_JUMBO:
75	    if (len - i < IP6OPT_JUMBO_LEN) {
76		printf("(jumbo: trunc)");
77		goto trunc;
78	    }
79	    if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
80		printf("(jumbo: invalid len %d)", bp[i + 1]);
81		goto trunc;
82	    }
83	    printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2]));
84	    optlen = IP6OPT_JUMBO_LEN;
85	    break;
86	default:
87	    if (len - i < IP6OPT_MINLEN) {
88		printf("(type %d: trunc)", bp[i]);
89		goto trunc;
90	    }
91	    printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
92	    optlen = bp[i + 1] + 2;
93	    break;
94	}
95    }
96
97#if 0
98end:
99#endif
100    return;
101
102trunc:
103    printf("[trunc] ");
104}
105
106int
107hbhopt_print(const u_char *bp)
108{
109    const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
110    int hbhlen = 0;
111
112    TCHECK(dp->ip6h_len);
113    hbhlen = (int)((dp->ip6h_len + 1) << 3);
114    TCHECK2(*dp, hbhlen);
115    printf("HBH ");
116    if (vflag)
117	ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
118
119    return(hbhlen);
120
121  trunc:
122    printf("[|HBH]");
123    return(hbhlen);
124}
125
126int
127dstopt_print(const u_char *bp)
128{
129    const struct ip6_dest *dp = (struct ip6_dest *)bp;
130    int dstoptlen = 0;
131
132    TCHECK(dp->ip6d_len);
133    dstoptlen = (int)((dp->ip6d_len + 1) << 3);
134    TCHECK2(*dp, dstoptlen);
135    printf("DSTOPT ");
136    if (vflag) {
137	ip6_opt_print((const u_char *)dp + sizeof(*dp),
138	    dstoptlen - sizeof(*dp));
139    }
140
141    return(dstoptlen);
142
143  trunc:
144    printf("[|DSTOPT]");
145    return(dstoptlen);
146}
147