print-enc.c revision 1.6 
1/*	$OpenBSD: print-enc.c,v 1.6 2000/10/03 14:31:57 ho Exp $	*/
2
3/*
4 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that: (1) source code distributions
9 * retain the above copyright notice and this paragraph in its entirety, (2)
10 * distributions including binary code include the above copyright notice and
11 * this paragraph in its entirety in the documentation or other materials
12 * provided with the distribution, and (3) all advertising materials mentioning
13 * features or use of this software display the following acknowledgement:
14 * ``This product includes software developed by the University of California,
15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16 * the University nor the names of its contributors may be used to endorse
17 * or promote products derived from this software without specific prior
18 * written permission.
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 */
23
24#ifndef lint
25static const char rcsid[] =
26    "@(#) $Header: /usr/local/opengrok/home/cvs-mirror/mirrors/openbsd/src/usr.sbin/tcpdump/print-enc.c,v 1.6 2000/10/03 14:31:57 ho Exp $ (LBL)";
27#endif
28
29#include <sys/param.h>
30#include <sys/time.h>
31#include <sys/socket.h>
32#include <sys/file.h>
33#include <sys/ioctl.h>
34#include <sys/mbuf.h>
35
36#ifdef __STDC__
37struct rtentry;
38#endif
39#include <net/if.h>
40#include <netinet/ip_ipsp.h>
41#include <net/if_enc.h>
42
43#include <netinet/in.h>
44#include <netinet/in_systm.h>
45#include <netinet/ip.h>
46
47#include <ctype.h>
48#include <netdb.h>
49#include <pcap.h>
50#include <signal.h>
51#include <stdio.h>
52
53#include "interface.h"
54#include "addrtoname.h"
55
56#define ENC_PRINT_TYPE(wh, xf, nam) \
57	if ((wh) & (xf)) { \
58		printf("%s%s", nam, (wh) == (xf) ? "): " : ","); \
59		(wh) &= ~(xf); \
60	}
61
62void
63enc_if_print(u_char *user, const struct pcap_pkthdr *h,
64	     register const u_char *p)
65{
66	register u_int length = h->len;
67	register u_int caplen = h->caplen;
68	int flags;
69	const struct ip *ip;
70	const struct enchdr *hdr;
71
72	ts_print(&h->ts);
73
74	if (caplen < ENC_HDRLEN) {
75		printf("[|enc]");
76		goto out;
77	}
78
79	/*
80	 * Some printers want to get back at the link level addresses,
81	 * and/or check that they're not walking off the end of the packet.
82	 * Rather than pass them all the way down, we set these globals.
83	 */
84	packetp = p;
85	snapend = p + caplen;
86
87	hdr = (struct enchdr *)p;
88	flags = hdr->flags;
89	if (flags == 0)
90	  printf("(unprotected): ");
91	else
92	  printf("(");
93	ENC_PRINT_TYPE(flags, M_AUTH, "authentic");
94	ENC_PRINT_TYPE(flags, M_CONF, "confidential");
95	/* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */
96	printf("SPI 0x%08x: ", ntohl(hdr->spi));
97
98	length -= ENC_HDRLEN;
99	ip = (struct ip *)(p + ENC_HDRLEN);
100	ip_print((const u_char *)ip, length);
101
102	if (xflag)
103		default_print((const u_char *)ip, caplen - ENC_HDRLEN);
104out:
105	putchar('\n');
106}
107