bsd/sys/domain.h

   1 /*
   2  * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
  29 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  30 /*
  31  * Copyright (c) 1982, 1986, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)domain.h    8.1 (Berkeley) 6/2/93
  63  * $FreeBSD: src/sys/sys/domain.h,v 1.14 1999/12/29 04:24:40 peter Exp $
  64  */
  65
  66 #ifndef _SYS_DOMAIN_H_
  67 #define _SYS_DOMAIN_H_
  68
  69 #ifdef PRIVATE
  70 #include <sys/appleapiopts.h>
  71 #include <sys/cdefs.h>
  72 #ifdef KERNEL_PRIVATE
  73 #include <kern/locks.h>
  74 /*
  75  * Structure per communications domain.
  76  */
  77
  78 /*
  79  * Forward structure declarations for function prototypes [sic].
  80  */
  81 struct  mbuf;
  82
  83 #pragma pack(4)
  84
  85 #ifdef XNU_KERNEL_PRIVATE
  86 /*
  87  * Legacy domain.
  88  *
  89  * NOTE: Do not modify this structure, as there are modules outside of xnu
  90  * which rely on the size and layout for binary compatibility.  This structure
  91  * is simply used by the exported net_{add,del}_domain_old, pffinddomain_old
  92  * routines.  Internally, domains are stored in the private variant of domain
  93  * defined down below.
  94  */
  95 struct domain_old {
  96 #else
  97 struct domain {
  98 #endif /* !XNU_KERNEL_PRIVATE */
  99         int     dom_family;             /* AF_xxx */
 100         const char *dom_name;
 101         void    (*dom_init)(void);      /* initialize domain data structures */
 102         int     (*dom_externalize)      /* externalize access rights */
 103                     (struct mbuf *);
 104         void    (*dom_dispose)          /* dispose of internalized rights */
 105                     (struct mbuf *);
 106 #ifdef XNU_KERNEL_PRIVATE
 107         struct  protosw_old *dom_protosw; /* Chain of protosw's for AF */
 108         struct  domain_old *dom_next;
 109 #else
 110         struct  protosw *dom_protosw;   /* Chain of protosw's for AF */
 111         struct  domain *dom_next;
 112 #endif /* !XNU_KERNEL_PRIVATE */
 113         int     (*dom_rtattach)         /* initialize routing table */
 114                     (void **, int);
 115         int     dom_rtoffset;           /* an arg to rtattach, in bits */
 116         int     dom_maxrtkey;           /* for routing layer */
 117         int     dom_protohdrlen;        /* len of protocol header */
 118         int     dom_refs;               /* # socreates outstanding */
 119         lck_mtx_t *dom_mtx;             /* domain global mutex */
 120         uint32_t dom_flags;
 121         uint32_t reserved[2];
 122 };
 123
 124 #pragma pack()
 125
 126 #ifdef XNU_KERNEL_PRIVATE
 127 /*
 128  * Internal, private and extendable representation of domain.
 129  */
 130 struct domain {
 131         int     dom_family;             /* AF_xxx */
 132         uint32_t dom_flags;             /* domain flags (see below ) */
 133         uint32_t dom_refs;              /* # socreates outstanding */
 134         lck_mtx_t *dom_mtx;             /* domain global mutex */
 135         decl_lck_mtx_data(, dom_mtx_s);
 136         TAILQ_ENTRY(domain) dom_entry;  /* next domain in list */
 137         TAILQ_HEAD(, protosw) dom_protosw; /* protosw chain */
 138         void    (*dom_init)             /* initialize domain data structures */
 139                     (struct domain *);
 140         int     (*dom_externalize)      /* externalize access rights */
 141                     (struct mbuf *);
 142         void    (*dom_dispose)          /* dispose of internalized rights */
 143                     (struct mbuf *);
 144         int     (*dom_rtattach)         /* initialize routing table */
 145                     (void **, int);
 146         int     dom_rtoffset;           /* an arg to rtattach, in bits */
 147         int     dom_maxrtkey;           /* for routing layer */
 148         int     dom_protohdrlen;        /* len of protocol header */
 149         const char *dom_name;
 150         struct domain_old *dom_old;     /* domain pointer per net_add_domain */
 151 };
 152
 153 extern TAILQ_HEAD(domains_head, domain) domains;
 154 extern struct domain *localdomain;
 155 #endif /* XNU_KERNEL_PRIVATE */
 156
 157 /*
 158  * Values for dom_flags
 159  */
 160 #define DOM_REENTRANT   0x1
 161 #ifdef BSD_KERNEL_PRIVATE
 162 #define DOM_INITIALIZED 0x2             /* domain has been initialized */
 163 #define DOM_ATTACHED    0x4             /* domain is in the global list */
 164 #define DOM_OLD         0x10000000      /* domain added via net_add_domain */
 165
 166 /* pseudo-public domain flags */
 167 #define DOMF_USERFLAGS  (DOM_REENTRANT)
 168 #endif /* BSD_KERNEL_PRIVATE */
 169
 170 __BEGIN_DECLS
 171 #ifdef XNU_KERNEL_PRIVATE
 172 extern void net_add_domain_old(struct domain_old *dp);
 173 extern int net_del_domain_old(struct domain_old *);
 174 extern void net_drain_domains(void);
 175 extern void domain_proto_mtx_lock_assert_held(void);
 176 extern void domain_proto_mtx_lock_assert_notheld(void);
 177 struct domain_guard;
 178 typedef const struct domain_guard *domain_guard_t;
 179 extern domain_guard_t domain_guard_deploy(void);
 180 extern void domain_guard_release(domain_guard_t);
 181 struct domain_unguard;
 182 typedef const struct domain_unguard *domain_unguard_t;
 183 extern domain_unguard_t domain_unguard_deploy(void);
 184 extern void domain_unguard_release(domain_unguard_t);
 185 extern struct domain_old *pffinddomain_old(int);
 186 #else
 187 extern void net_add_domain(struct domain *dp);
 188 extern int net_del_domain(struct domain *);
 189 #endif /* XNU_KERNEL_PRIVATE */
 190 extern struct domain *pffinddomain(int);
 191 __END_DECLS
 192 #endif /* KERNEL_PRIVATE */
 193 #endif /* PRIVATE */
 194 #endif  /* _SYS_DOMAIN_H_ */