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      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 casptr() on this because I don't set it until KEYSOCK_HELLO
    109 	 * 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