Line data Source code
1 : /* $OpenBSD: ip_ipip.h,v 1.10 2017/06/20 11:12:13 bluhm 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 : u_int64_t ipips_ipackets; /* total input packets */
48 : u_int64_t ipips_opackets; /* total output packets */
49 : u_int64_t ipips_hdrops; /* packet shorter than header shows */
50 : u_int64_t ipips_qfull;
51 : u_int64_t ipips_ibytes;
52 : u_int64_t ipips_obytes;
53 : u_int64_t ipips_pdrops; /* packet dropped due to policy */
54 : u_int64_t ipips_spoof; /* IP spoofing attempts */
55 : u_int64_t ipips_family; /* Protocol family mismatch */
56 : u_int64_t ipips_unspec; /* Missing tunnel endpoint address */
57 : };
58 :
59 : #define IP4_DEFAULT_TTL 0
60 : #define IP4_SAME_TTL -1
61 :
62 : /*
63 : * Names for IPIP sysctl objects
64 : */
65 : #define IPIPCTL_ALLOW 1 /* accept incoming IP4 packets */
66 : #define IPIPCTL_STATS 2 /* IPIP stats */
67 : #define IPIPCTL_MAXID 3
68 :
69 : #define IPIPCTL_NAMES { \
70 : { 0, 0 }, \
71 : { "allow", CTLTYPE_INT }, \
72 : { "stats", CTLTYPE_STRUCT }, \
73 : }
74 :
75 : #ifdef _KERNEL
76 :
77 : #include <sys/percpu.h>
78 :
79 : enum ipipstat_counters {
80 : ipips_ipackets,
81 : ipips_opackets,
82 : ipips_hdrops,
83 : ipips_qfull,
84 : ipips_ibytes,
85 : ipips_obytes,
86 : ipips_pdrops,
87 : ipips_spoof,
88 : ipips_family,
89 : ipips_unspec,
90 : ipips_ncounters
91 : };
92 :
93 : extern struct cpumem *ipipcounters;
94 :
95 : static inline void
96 0 : ipipstat_inc(enum ipipstat_counters c)
97 : {
98 0 : counters_inc(ipipcounters, c);
99 0 : }
100 :
101 : static inline void
102 0 : ipipstat_add(enum ipipstat_counters c, uint64_t v)
103 : {
104 0 : counters_add(ipipcounters, c, v);
105 0 : }
106 :
107 : void ipip_init(void);
108 : int ipip_input(struct mbuf **, int *, int, int);
109 : int ipip_input_if(struct mbuf **, int *, int, int, struct ifnet *);
110 : int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
111 : int ipip_sysctl(int *, u_int, void *, size_t *, void *, size_t);
112 :
113 : extern int ipip_allow;
114 : #endif /* _KERNEL */
115 : #endif /* _NETINET_IPIP_H_ */
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