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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 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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     30 
     31 #ifdef	__cplusplus
     32 extern "C" {
     33 #endif
     34 
     35 #include <netinet/in.h>
     36 #include <sys/types.h>
     37 #include <inet/ip6.h>
     38 
     39 /*
     40  * The maximum size of the label, including NULL bytes following the
     41  * label string.  The implementation assumes that this value is 16.
     42  */
     43 #define	IP6_ASP_MAXLABELSIZE	16
     44 
     45 typedef struct ip6_asp {
     46 	in6_addr_t	ip6_asp_prefix;
     47 	in6_addr_t	ip6_asp_mask;
     48 	/*
     49 	 * ip6_asp_label must be on an 8 byte boundary because we cast
     50 	 * them as (int64_t *) in order to compare them as two 64 bit
     51 	 * integers rather than sixteen characters.
     52 	 */
     53 	union {
     54 		char	iau_label_c[IP6_ASP_MAXLABELSIZE];
     55 		int64_t	iau_label_i[IP6_ASP_MAXLABELSIZE / sizeof (int64_t)];
     56 	} ip6_asp_u;
     57 	uint32_t	ip6_asp_precedence;
     58 } ip6_asp_t;
     59 #define	ip6_asp_label	ip6_asp_u.iau_label_c
     60 
     61 #if defined(_SYSCALL32) && _LONG_LONG_ALIGNMENT_32 == 4
     62 
     63 /*
     64  * The ip6_asp structure as seen by a 64-bit kernel looking
     65  * at a 32-bit process, where the 32-bit process uses 32-bit
     66  * alignment for 64-bit quantities.  Like i386 does :-)
     67  */
     68 typedef struct ip6_asp32 {
     69 	in6_addr_t	ip6_asp_prefix;
     70 	in6_addr_t	ip6_asp_mask;
     71 	union {
     72 		char	iau_label_c[IP6_ASP_MAXLABELSIZE];
     73 		int32_t	iau_label_i[IP6_ASP_MAXLABELSIZE / sizeof (int32_t)];
     74 	} ip6_asp_u;
     75 	uint32_t	ip6_asp_precedence;
     76 } ip6_asp32_t;
     77 
     78 #endif	/* _SYSCALL32 && _LONG_LONG_ALIGNMENT_32 == 4 */
     79 
     80 #define	IP6_ASP_TABLE_REFHOLD(ipst) {			\
     81 	ipst->ips_ip6_asp_refcnt++;			\
     82 	ASSERT(ipst->ips_ip6_asp_refcnt != 0);		\
     83 }
     84 
     85 #define	IP6_ASP_TABLE_REFRELE(ipst)	{		\
     86 	mutex_enter(&ipst->ips_ip6_asp_lock);		\
     87 	ASSERT(ipst->ips_ip6_asp_refcnt != 0);		\
     88 	if (--ipst->ips_ip6_asp_refcnt == 0) {		\
     89 		mutex_exit(&ipst->ips_ip6_asp_lock);	\
     90 		ip6_asp_check_for_updates(ipst);		\
     91 	} else {					\
     92 		mutex_exit(&ipst->ips_ip6_asp_lock);	\
     93 	}						\
     94 }
     95 
     96 /*
     97  * Structure used in the SIOCGDSTINFO request.
     98  * Used to retrieve information about the given destination
     99  * address, to be used by the caller to sort a list of
    100  * potential destination addresses.
    101  */
    102 struct dstinforeq {
    103 	in6_addr_t	dir_daddr;		/* destination address */
    104 	in6_addr_t	dir_saddr;		/* source address for daddr */
    105 	in6addr_scope_t	dir_dscope;		/* destination scope */
    106 	in6addr_scope_t	dir_sscope;		/* source scope */
    107 	t_uscalar_t	dir_dmactype;		/* dl_mac_type of output inf */
    108 	uint32_t	dir_precedence;		/* destination precedence */
    109 	uint8_t		dir_dreachable : 1,	/* is destination reachable? */
    110 			dir_sdeprecated : 1,	/* is source deprecated? */
    111 			dir_labelmatch: 1,	/* src and dst labels match? */
    112 			dir_padbits : 5;
    113 };
    114 
    115 #ifdef _KERNEL
    116 
    117 typedef void (*aspfunc_t)(ipsq_t *, queue_t *, mblk_t *, void *);
    118 
    119 extern void	ip6_asp_free(ip_stack_t *);
    120 extern void	ip6_asp_init(ip_stack_t *);
    121 extern boolean_t	ip6_asp_can_lookup(ip_stack_t *);
    122 extern void	ip6_asp_table_refrele(ip_stack_t *);
    123 extern char	*ip6_asp_lookup(const in6_addr_t *, uint32_t *, ip_stack_t *);
    124 extern void	ip6_asp_replace(mblk_t *mp, ip6_asp_t *, size_t, boolean_t,
    125     ip_stack_t *, model_t);
    126 extern int	ip6_asp_get(ip6_asp_t *, size_t, ip_stack_t *);
    127 extern boolean_t	ip6_asp_labelcmp(const char *, const char *);
    128 extern void	ip6_asp_pending_op(queue_t *, mblk_t *, aspfunc_t);
    129 
    130 #endif /* _KERNEL */
    131 
    132 #ifdef	__cplusplus
    133 }
    134 #endif
    135 
    136 #endif	/* _INET_IP6_ASP_H */
    137