xref: /titanic_41/usr/src/uts/common/inet/ipsecah.h (revision 8b6220d73c6a079b62251e38103a523c41ee541a)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef	_INET_IPSECAH_H
27 #define	_INET_IPSECAH_H
28 
29 #include <inet/ip.h>
30 #include <inet/ipdrop.h>
31 
32 #ifdef	__cplusplus
33 extern "C" {
34 #endif
35 
36 #include <sys/note.h>
37 
38 #ifdef _KERNEL
39 /* Named Dispatch Parameter Management Structure */
40 typedef struct ipsecahparam_s {
41 	uint_t	ipsecah_param_min;
42 	uint_t	ipsecah_param_max;
43 	uint_t	ipsecah_param_value;
44 	char	*ipsecah_param_name;
45 } ipsecahparam_t;
46 
47 /*
48  * Stats.  This may eventually become a full-blown SNMP MIB once that spec
49  * stabilizes.
50  */
51 typedef struct ah_kstats_s
52 {
53 	kstat_named_t ah_stat_num_aalgs;
54 	kstat_named_t ah_stat_good_auth;
55 	kstat_named_t ah_stat_bad_auth;
56 	kstat_named_t ah_stat_replay_failures;
57 	kstat_named_t ah_stat_replay_early_failures;
58 	kstat_named_t ah_stat_keysock_in;
59 	kstat_named_t ah_stat_out_requests;
60 	kstat_named_t ah_stat_acquire_requests;
61 	kstat_named_t ah_stat_bytes_expired;
62 	kstat_named_t ah_stat_out_discards;
63 	kstat_named_t ah_stat_crypto_sync;
64 	kstat_named_t ah_stat_crypto_async;
65 	kstat_named_t ah_stat_crypto_failures;
66 } ah_kstats_t;
67 
68 /*
69  * ahstack->ah_kstats is equal to ahstack->ah_ksp->ks_data if
70  * kstat_create_netstack for ahstack->ah_ksp succeeds, but when it
71  * fails, it will be NULL. Note this is done for all stack instances,
72  * so it *could* fail. hence a non-NULL checking is done for
73  * AH_BUMP_STAT and AH_DEBUMP_STAT
74  */
75 #define	AH_BUMP_STAT(ahstack, x)					\
76 do {									\
77 	if (ahstack->ah_kstats != NULL)					\
78 		(ahstack->ah_kstats->ah_stat_ ## x).value.ui64++;	\
79 _NOTE(CONSTCOND)							\
80 } while (0)
81 #define	AH_DEBUMP_STAT(ahstack, x)					\
82 do {									\
83 	if (ahstack->ah_kstats != NULL)					\
84 		(ahstack->ah_kstats->ah_stat_ ## x).value.ui64--;	\
85 _NOTE(CONSTCOND)							\
86 } while (0)
87 
88 /*
89  * IPSECAH stack instances
90  */
91 struct ipsecah_stack {
92 	netstack_t		*ipsecah_netstack;	/* Common netstack */
93 
94 	caddr_t			ipsecah_g_nd;
95 	ipsecahparam_t		*ipsecah_params;
96 	kmutex_t		ipsecah_param_lock;	/* Protects params */
97 
98 	sadbp_t			ah_sadb;
99 
100 	/* Packet dropper for AH drops. */
101 	ipdropper_t		ah_dropper;
102 
103 	kstat_t			*ah_ksp;
104 	ah_kstats_t		*ah_kstats;
105 
106 	/*
107 	 * Keysock instance of AH.  There can be only one per stack instance.
108 	 * Use atomic_cas_ptr() on this because I don't set it until
109 	 * KEYSOCK_HELLO comes down.
110 	 * Paired up with the ah_pfkey_q is the ah_event, which will age SAs.
111 	 */
112 	queue_t			*ah_pfkey_q;
113 	timeout_id_t		ah_event;
114 };
115 typedef struct ipsecah_stack ipsecah_stack_t;
116 
117 #endif	/* _KERNEL */
118 
119 /*
120  * For now, only provide "aligned" version of header.
121  * If aligned version is needed, we'll go with the naming conventions then.
122  */
123 
124 typedef struct ah {
125 	uint8_t ah_nexthdr;
126 	uint8_t ah_length;
127 	uint16_t ah_reserved;
128 	uint32_t ah_spi;
129 	uint32_t ah_replay;
130 } ah_t;
131 
132 #define	AH_BASELEN	12
133 #define	AH_TOTAL_LEN(ah)	(((ah)->ah_length << 2) + AH_BASELEN - \
134 					sizeof ((ah)->ah_replay))
135 
136 /* "Old" AH, without replay.  For 1827-29 compatibility. */
137 
138 typedef struct ahold {
139 	uint8_t ah_nexthdr;
140 	uint8_t ah_length;
141 	uint16_t ah_reserved;
142 	uint32_t ah_spi;
143 } ahold_t;
144 
145 #define	AHOLD_BASELEN	8
146 #define	AHOLD_TOTAL_LEN(ah)	(((ah)->ah_length << 2) + AH_BASELEN)
147 
148 #ifdef	__cplusplus
149 }
150 #endif
151 
152 #endif /* _INET_IPSECAH_H */
153