1 /* $OpenBSD: ip_ipip.h,v 1.5 2002/06/09 16:26:10 itojun Exp $ */
2 /*
3 * The authors of this code are John Ioannidis (ji@tla.org),
4 * Angelos D. Keromytis (kermit@csd.uch.gr) and
5 * Niels Provos (provos@physnet.uni-hamburg.de).
6 *
7 * The original version of this code was written by John Ioannidis
8 * for BSD/OS in Athens, Greece, in November 1995.
9 *
10 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
11 * by Angelos D. Keromytis.
12 *
13 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
14 * and Niels Provos.
15 *
16 * Additional features in 1999 by Angelos D. Keromytis.
17 *
18 * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
19 * Angelos D. Keromytis and Niels Provos.
20 * Copyright (c) 2001, Angelos D. Keromytis.
21 *
22 * Permission to use, copy, and modify this software with or without fee
23 * is hereby granted, provided that this entire notice is included in
24 * all copies of any software which is or includes a copy or
25 * modification of this software.
26 * You may use this code under the GNU public license if you so wish. Please
27 * contribute changes back to the authors under this freer than GPL license
28 * so that we may further the use of strong encryption without limitations to
29 * all.
30 *
31 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
32 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
33 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
34 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
35 * PURPOSE.
36 */
37
38 #ifndef _NETINET_IPIP_H_
39 #define _NETINET_IPIP_H_
40
41 /*
42 * IP-inside-IP processing.
43 * Not quite all the functionality of RFC-1853, but the main idea is there.
44 */
45
46 struct ipipstat
47 {
48 u_int32_t ipips_ipackets; /* total input packets */
49 u_int32_t ipips_opackets; /* total output packets */
50 u_int32_t ipips_hdrops; /* packet shorter than header shows */
51 u_int32_t ipips_qfull;
52 u_int64_t ipips_ibytes;
53 u_int64_t ipips_obytes;
54 u_int32_t ipips_pdrops; /* packet dropped due to policy */
55 u_int32_t ipips_spoof; /* IP spoofing attempts */
56 u_int32_t ipips_family; /* Protocol family mismatch */
57 u_int32_t ipips_unspec; /* Missing tunnel endpoint address */
58 };
59
60 #define IP4_DEFAULT_TTL 0
61 #define IP4_SAME_TTL -1
62
63 /*
64 * Names for IPIP sysctl objects
65 */
66 #define IPIPCTL_ALLOW 1 /* accept incoming IP4 packets */
67 #define IPIPCTL_MAXID 2
68
69 #define IPIPCTL_NAMES { \
70 { 0, 0 }, \
71 { "allow", CTLTYPE_INT }, \
72 }
73
74 #ifdef _KERNEL
75 int ipip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
76
77 extern int ipip_allow;
78 extern struct ipipstat ipipstat;
79 #endif /* _KERNEL */
80 #endif /* _NETINET_IPIP_H_ */