print-enc.c revision 1.4 
1/*
2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22#ifndef lint
23static const char rcsid[] =
24    "@(#) $Header: /usr/local/opengrok/home/cvs-mirror/mirrors/openbsd/src/usr.sbin/tcpdump/print-enc.c,v 1.4 1999/12/08 21:45:00 angelos Exp $ (LBL)";
25#endif
26
27#include <sys/param.h>
28#include <sys/time.h>
29#include <sys/socket.h>
30#include <sys/file.h>
31#include <sys/ioctl.h>
32#include <sys/mbuf.h>
33
34#ifdef __STDC__
35struct rtentry;
36#endif
37#include <net/if.h>
38#include <netinet/ip_ipsp.h>
39#include <net/if_enc.h>
40
41#include <netinet/in.h>
42#include <netinet/in_systm.h>
43#include <netinet/ip.h>
44
45#include <ctype.h>
46#include <netdb.h>
47#include <pcap.h>
48#include <signal.h>
49#include <stdio.h>
50
51#include "interface.h"
52#include "addrtoname.h"
53
54#define ENC_PRINT_TYPE(wh, xf, nam) \
55	if ((wh) & (xf)) { \
56		printf("%s%s", nam, (wh) == (xf) ? "): " : ","); \
57		(wh) &= ~(xf); \
58	}
59
60void
61enc_if_print(u_char *user, const struct pcap_pkthdr *h,
62	     register const u_char *p)
63{
64	register u_int length = h->len;
65	register u_int caplen = h->caplen;
66	int flags;
67	const struct ip *ip;
68	const struct enchdr *hdr;
69
70	ts_print(&h->ts);
71
72	if (caplen < ENC_HDRLEN) {
73		printf("[|enc]");
74		goto out;
75	}
76
77	/*
78	 * Some printers want to get back at the link level addresses,
79	 * and/or check that they're not walking off the end of the packet.
80	 * Rather than pass them all the way down, we set these globals.
81	 */
82	packetp = p;
83	snapend = p + caplen;
84
85	hdr = (struct enchdr *)p;
86	flags = hdr->flags;
87	ENC_PRINT_TYPE(flags, M_AUTH, "authentic");
88	ENC_PRINT_TYPE(flags, M_CONF, "confidential");
89	/* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */
90	printf("SPI 0x%08x: ", ntohl(hdr->spi));
91
92	length -= ENC_HDRLEN;
93	ip = (struct ip *)(p + ENC_HDRLEN);
94	ip_print((const u_char *)ip, length);
95
96	if (xflag)
97		default_print((const u_char *)ip, caplen - ENC_HDRLEN);
98out:
99	putchar('\n');
100}
101