1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.2.2.1 2000/01/11 06:58:25 fenner Exp $";
#endif
#ifdef INET6
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
void
ip6_opt_print(const u_char *bp, int len)
{
int i;
int optlen;
for (i = 0; i < len; i += optlen) {
switch (bp[i]) {
case IP6OPT_PAD1:
optlen = 1;
break;
case IP6OPT_PADN:
if (len - i < IP6OPT_MINLEN) {
printf("(padn: trunc)");
goto trunc;
}
optlen = bp[i + 1] + 2;
break;
case IP6OPT_RTALERT:
if (len - i < IP6OPT_RTALERT_LEN) {
printf("(rtalert: trunc)");
goto trunc;
}
if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) {
printf("(rtalert: invalid len %d)", bp[i + 1]);
goto trunc;
}
printf("(rtalert: 0x%04x) ", ntohs(*(u_short *)&bp[i + 2]));
optlen = IP6OPT_RTALERT_LEN;
break;
case IP6OPT_JUMBO:
if (len - i < IP6OPT_JUMBO_LEN) {
printf("(jumbo: trunc)");
goto trunc;
}
if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) {
printf("(jumbo: invalid len %d)", bp[i + 1]);
goto trunc;
}
printf("(jumbo: %u) ", (u_int32_t)ntohl(*(u_int *)&bp[i + 2]));
optlen = IP6OPT_JUMBO_LEN;
break;
default:
if (len - i < IP6OPT_MINLEN) {
printf("(type %d: trunc)", bp[i]);
goto trunc;
}
printf("(type 0x%02x: len=%d) ", bp[i], bp[i + 1]);
optlen = bp[i + 1] + 2;
break;
}
}
#if 0
end:
#endif
return;
trunc:
printf("[trunc] ");
}
int
hbhopt_print(register const u_char *bp)
{
const struct ip6_hbh *dp = (struct ip6_hbh *)bp;
register const u_char *ep;
int hbhlen = 0;
/* 'ep' points to the end of avaible data. */
ep = snapend;
TCHECK(dp->ip6h_len);
hbhlen = (int)((dp->ip6h_len + 1) << 3);
TCHECK2(dp, hbhlen);
printf("HBH ");
if (vflag)
ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp));
return(hbhlen);
trunc:
fputs("[|HBH]", stdout);
return(hbhlen);
}
int
dstopt_print(register const u_char *bp)
{
const struct ip6_dest *dp = (struct ip6_dest *)bp;
register const u_char *ep;
int dstoptlen = 0;
/* 'ep' points to the end of avaible data. */
ep = snapend;
TCHECK(dp->ip6d_len);
dstoptlen = (int)((dp->ip6d_len + 1) << 3);
TCHECK2(dp, dstoptlen);
printf("DSTOPT ");
if (vflag) {
ip6_opt_print((const u_char *)dp + sizeof(*dp),
dstoptlen - sizeof(*dp));
}
return(dstoptlen);
trunc:
fputs("[|DSTOPT]", stdout);
return(dstoptlen);
}
#endif /* INET6 */
|
