xref: /illumos-gate/usr/src/uts/common/inet/ip6_asp.h (revision 2d6eb4a5e0a47d30189497241345dc5466bb68ab)
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 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef	_INET_IP6_ASP_H
27 #define	_INET_IP6_ASP_H
28 
29 #ifdef	__cplusplus
30 extern "C" {
31 #endif
32 
33 #include <netinet/in.h>
34 #include <sys/types.h>
35 #include <inet/ip6.h>
36 
37 /*
38  * The maximum size of the label, including NULL bytes following the
39  * label string.  The implementation assumes that this value is 16.
40  */
41 #define	IP6_ASP_MAXLABELSIZE	16
42 
43 typedef struct ip6_asp {
44 	in6_addr_t	ip6_asp_prefix;
45 	in6_addr_t	ip6_asp_mask;
46 	/*
47 	 * ip6_asp_label must be on an 8 byte boundary because we cast
48 	 * them as (int64_t *) in order to compare them as two 64 bit
49 	 * integers rather than sixteen characters.
50 	 */
51 	union {
52 		char	iau_label_c[IP6_ASP_MAXLABELSIZE];
53 		int64_t	iau_label_i[IP6_ASP_MAXLABELSIZE / sizeof (int64_t)];
54 	} ip6_asp_u;
55 	uint32_t	ip6_asp_precedence;
56 } ip6_asp_t;
57 #define	ip6_asp_label	ip6_asp_u.iau_label_c
58 
59 #if defined(_SYSCALL32) && _LONG_LONG_ALIGNMENT_32 == 4
60 
61 /*
62  * The ip6_asp structure as seen by a 64-bit kernel looking
63  * at a 32-bit process, where the 32-bit process uses 32-bit
64  * alignment for 64-bit quantities.  Like i386 does :-)
65  */
66 typedef struct ip6_asp32 {
67 	in6_addr_t	ip6_asp_prefix;
68 	in6_addr_t	ip6_asp_mask;
69 	union {
70 		char	iau_label_c[IP6_ASP_MAXLABELSIZE];
71 		int32_t	iau_label_i[IP6_ASP_MAXLABELSIZE / sizeof (int32_t)];
72 	} ip6_asp_u;
73 	uint32_t	ip6_asp_precedence;
74 } ip6_asp32_t;
75 
76 #endif	/* _SYSCALL32 && _LONG_LONG_ALIGNMENT_32 == 4 */
77 
78 #define	IP6_ASP_TABLE_REFHOLD(ipst) {			\
79 	ipst->ips_ip6_asp_refcnt++;			\
80 	ASSERT(ipst->ips_ip6_asp_refcnt != 0);		\
81 }
82 
83 #define	IP6_ASP_TABLE_REFRELE(ipst)	{		\
84 	mutex_enter(&ipst->ips_ip6_asp_lock);		\
85 	ASSERT(ipst->ips_ip6_asp_refcnt != 0);		\
86 	if (--ipst->ips_ip6_asp_refcnt == 0) {		\
87 		mutex_exit(&ipst->ips_ip6_asp_lock);	\
88 		ip6_asp_check_for_updates(ipst);		\
89 	} else {					\
90 		mutex_exit(&ipst->ips_ip6_asp_lock);	\
91 	}						\
92 }
93 
94 /*
95  * Structure used in the SIOCGDSTINFO request.
96  * Used to retrieve information about the given destination
97  * address, to be used by the caller to sort a list of
98  * potential destination addresses.
99  */
100 struct dstinforeq {
101 	in6_addr_t	dir_daddr;		/* destination address */
102 	in6_addr_t	dir_saddr;		/* source address for daddr */
103 	in6addr_scope_t	dir_dscope;		/* destination scope */
104 	in6addr_scope_t	dir_sscope;		/* source scope */
105 	t_uscalar_t	dir_dmactype;		/* dl_mac_type of output inf */
106 	uint32_t	dir_precedence;		/* destination precedence */
107 	uint8_t		dir_dreachable : 1,	/* is destination reachable? */
108 			dir_sdeprecated : 1,	/* is source deprecated? */
109 			dir_labelmatch: 1,	/* src and dst labels match? */
110 			dir_padbits : 5;
111 };
112 
113 #ifdef _KERNEL
114 
115 typedef void (*aspfunc_t)(ipsq_t *, queue_t *, mblk_t *, void *);
116 
117 extern void	ip6_asp_free(ip_stack_t *);
118 extern void	ip6_asp_init(ip_stack_t *);
119 extern boolean_t	ip6_asp_can_lookup(ip_stack_t *);
120 extern void	ip6_asp_table_refrele(ip_stack_t *);
121 extern char	*ip6_asp_lookup(const in6_addr_t *, uint32_t *, ip_stack_t *);
122 extern void	ip6_asp_replace(mblk_t *mp, ip6_asp_t *, size_t, boolean_t,
123     ip_stack_t *, model_t);
124 extern int	ip6_asp_get(ip6_asp_t *, size_t, ip_stack_t *);
125 extern boolean_t	ip6_asp_labelcmp(const char *, const char *);
126 extern void	ip6_asp_pending_op(queue_t *, mblk_t *, aspfunc_t);
127 
128 #endif /* _KERNEL */
129 
130 #ifdef	__cplusplus
131 }
132 #endif
133 
134 #endif	/* _INET_IP6_ASP_H */
135