include/inet/ip6_asp.h

   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 */