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
|
/* $OpenBSD: print-enc.c,v 1.17 2021/12/01 18:28:45 deraadt Exp $ */
/*
* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <net/if.h>
#include <netinet/ip_ipsp.h>
#include <sys/mbuf.h>
#include <net/if_enc.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <ctype.h>
#include <netdb.h>
#include <pcap.h>
#include <signal.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
#define ENC_PRINT_TYPE(wh, xf, nam) \
if ((wh) & (xf)) { \
printf("%s%s", nam, (wh) == (xf) ? "): " : ","); \
(wh) &= ~(xf); \
}
void
enc_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
{
u_int length = h->len, caplen = h->caplen;
const struct enchdr *hdr;
int flags;
ts_print(&h->ts);
if (caplen < ENC_HDRLEN) {
printf("[|enc]");
goto out;
}
/*
* Some printers want to get back at the link level addresses,
* and/or check that they're not walking off the end of the packet.
* Rather than pass them all the way down, we set these globals.
*/
packetp = p;
snapend = p + caplen;
hdr = (struct enchdr *)p;
flags = hdr->flags;
if (flags == 0)
printf("(unprotected): ");
else
printf("(");
ENC_PRINT_TYPE(flags, M_AUTH, "authentic");
ENC_PRINT_TYPE(flags, M_CONF, "confidential");
/* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */
printf("SPI 0x%08x: ", ntohl(hdr->spi));
length -= ENC_HDRLEN;
p += ENC_HDRLEN;
switch (hdr->af) {
case AF_INET:
default:
ip_print(p, length);
break;
case AF_INET6:
ip6_print(p, length);
break;
}
if (xflag)
default_print(p, caplen - ENC_HDRLEN);
out:
putchar('\n');
}
|
