1 /* $OpenBSD: ip_ah.h,v 1.31 2004/02/17 12:07:45 markus 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 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_IP_AH_H_
39 #define _NETINET_IP_AH_H_
40
41 struct ahstat
42 {
43 u_int32_t ahs_hdrops; /* Packet shorter than header shows */
44 u_int32_t ahs_nopf; /* Protocol family not supported */
45 u_int32_t ahs_notdb;
46 u_int32_t ahs_badkcr;
47 u_int32_t ahs_badauth;
48 u_int32_t ahs_noxform;
49 u_int32_t ahs_qfull;
50 u_int32_t ahs_wrap;
51 u_int32_t ahs_replay;
52 u_int32_t ahs_badauthl; /* Bad authenticator length */
53 u_int32_t ahs_input; /* Input AH packets */
54 u_int32_t ahs_output; /* Output AH packets */
55 u_int32_t ahs_invalid; /* Trying to use an invalid TDB */
56 u_int64_t ahs_ibytes; /* Input bytes */
57 u_int64_t ahs_obytes; /* Output bytes */
58 u_int32_t ahs_toobig; /* Packet got larger than IP_MAXPACKET */
59 u_int32_t ahs_pdrops; /* Packet blocked due to policy */
60 u_int32_t ahs_crypto; /* Crypto processing failure */
61 };
62
63 struct ah
64 {
65 u_int8_t ah_nh;
66 u_int8_t ah_hl;
67 u_int16_t ah_rv;
68 u_int32_t ah_spi;
69 u_int32_t ah_rpl; /* We may not use this, if we're using old xforms */
70 };
71
72 /* Length of base AH header */
73 #define AH_FLENGTH 8
74
75 /* Size of the largest hash function output used in AH-new, in bytes */
76 #define AH_MAX_HASHLEN 20
77
78 /*
79 * Names for AH sysctl objects
80 */
81 #define AHCTL_ENABLE 1 /* Enable AH processing */
82 #define AHCTL_MAXID 2
83
84 #define AHCTL_NAMES { \
85 { 0, 0 }, \
86 { "enable", CTLTYPE_INT }, \
87 }
88
89 #define AHCTL_VARS { \
90 NULL, \
91 &ah_enable, \
92 }
93
94 #ifdef _KERNEL
95 extern int ah_enable;
96 extern struct ahstat ahstat;
97 #endif /* _KERNEL */
98 #endif /* _NETINET_IP_AH_H_ */