print-enc.c revision 1.17 
1/*	$OpenBSD: print-enc.c,v 1.17 2021/12/01 18:28:45 deraadt 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#include <sys/types.h>
25#include <sys/time.h>
26#include <sys/socket.h>
27#include <sys/file.h>
28#include <sys/ioctl.h>
29#include <sys/queue.h>
30
31#include <net/if.h>
32#include <netinet/ip_ipsp.h>
33
34#include <sys/mbuf.h>
35#include <net/if_enc.h>
36
37#include <netinet/in.h>
38#include <netinet/ip.h>
39
40#include <ctype.h>
41#include <netdb.h>
42#include <pcap.h>
43#include <signal.h>
44#include <stdio.h>
45
46#include "interface.h"
47#include "addrtoname.h"
48
49#define ENC_PRINT_TYPE(wh, xf, nam) \
50	if ((wh) & (xf)) { \
51		printf("%s%s", nam, (wh) == (xf) ? "): " : ","); \
52		(wh) &= ~(xf); \
53	}
54
55void
56enc_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p)
57{
58	u_int length = h->len, caplen = h->caplen;
59	const struct enchdr *hdr;
60	int flags;
61
62	ts_print(&h->ts);
63
64	if (caplen < ENC_HDRLEN) {
65		printf("[|enc]");
66		goto out;
67	}
68
69	/*
70	 * Some printers want to get back at the link level addresses,
71	 * and/or check that they're not walking off the end of the packet.
72	 * Rather than pass them all the way down, we set these globals.
73	 */
74	packetp = p;
75	snapend = p + caplen;
76
77	hdr = (struct enchdr *)p;
78	flags = hdr->flags;
79	if (flags == 0)
80		printf("(unprotected): ");
81	else
82		printf("(");
83	ENC_PRINT_TYPE(flags, M_AUTH, "authentic");
84	ENC_PRINT_TYPE(flags, M_CONF, "confidential");
85	/* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */
86	printf("SPI 0x%08x: ", ntohl(hdr->spi));
87
88	length -= ENC_HDRLEN;
89	p += ENC_HDRLEN;
90
91	switch (hdr->af) {
92	case AF_INET:
93	default:
94		ip_print(p, length);
95		break;
96	case AF_INET6:
97		ip6_print(p, length);
98		break;
99	}
100
101	if (xflag)
102		default_print(p, caplen - ENC_HDRLEN);
103out:
104	putchar('\n');
105}
106