bsd/kern/uipc_proto.c

   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  *      @(#)uipc_proto.c        8.2 (Berkeley) 2/14/95
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/socket.h>
  67 #include <sys/protosw.h>
  68 #include <sys/domain.h>
  69 #include <sys/mbuf.h>
  70 #include <sys/mcache.h>
  71 #include <sys/un.h>
  72 #include <net/raw_cb.h>
  73 #include <sys/sysctl.h>
  74
  75 /*
  76  * Definitions of protocols supported in the UNIX domain.
  77  */
  78 struct domain *localdomain = NULL;
  79 static void pre_unp_init(struct domain *);
  80
  81 extern struct domain localdomain_s;
  82
  83 static struct protosw localsw[] = {
  84 {
  85         .pr_type =      SOCK_STREAM,
  86         .pr_flags =     PR_CONNREQUIRED|PR_WANTRCVD|PR_RIGHTS|PR_PCBLOCK,
  87         .pr_ctloutput = uipc_ctloutput,
  88         .pr_usrreqs =   &uipc_usrreqs,
  89         .pr_lock =      unp_lock,
  90         .pr_unlock =    unp_unlock,
  91         .pr_getlock =   unp_getlock
  92 },
  93 {
  94         .pr_type =      SOCK_DGRAM,
  95         .pr_flags =     PR_ATOMIC|PR_ADDR|PR_RIGHTS,
  96         .pr_ctloutput = uipc_ctloutput,
  97         .pr_usrreqs =   &uipc_usrreqs,
  98         .pr_lock =      unp_lock,
  99         .pr_unlock =    unp_unlock,
 100         .pr_getlock =   unp_getlock
 101 },
 102 {
 103         .pr_ctlinput =  raw_ctlinput,
 104         .pr_usrreqs =   &raw_usrreqs,
 105 },
 106 };
 107
 108 static int local_proto_count = (sizeof (localsw) / sizeof (struct protosw));
 109
 110 static void
 111 pre_unp_init(struct domain *dp)
 112 {
 113         struct protosw *pr;
 114         int i;
 115
 116         VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
 117         VERIFY(localdomain == NULL);
 118
 119         localdomain = dp;
 120
 121         for (i = 0, pr = &localsw[0]; i < local_proto_count; i++, pr++)
 122                 net_add_proto(pr, dp, 1);
 123
 124         unp_init();
 125 }
 126
 127 struct domain localdomain_s = {
 128         .dom_family =           PF_LOCAL,
 129         .dom_name =             "unix",
 130         .dom_init =             pre_unp_init,
 131         .dom_externalize =      unp_externalize,
 132         .dom_dispose =          unp_dispose,
 133 };
 134
 135 SYSCTL_NODE(_net, PF_LOCAL, local, CTLFLAG_RW|CTLFLAG_LOCKED,
 136         NULL, "Local domain");
 137 SYSCTL_NODE(_net_local, SOCK_STREAM, stream, CTLFLAG_RW|CTLFLAG_LOCKED,
 138         NULL, "SOCK_STREAM");
 139 SYSCTL_NODE(_net_local, SOCK_DGRAM, dgram, CTLFLAG_RW|CTLFLAG_LOCKED,
 140         NULL, "SOCK_DGRAM");