bsd/netat/at_proto.c

   1 /*
   2  * Copyright (c) 2000-2006 Apple Computer, 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 /*
  29  *      Copyright (c) 1998 Apple Computer, Inc.
  30  */
  31
  32 /*      at_proto.c
  33  */
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/ioctl.h>
  38 #include <sys/errno.h>
  39 #include <sys/malloc.h>
  40 #include <sys/socket.h>
  41 #include <sys/socketvar.h>
  42 #include <sys/protosw.h>
  43 #include <sys/domain.h>
  44 #include <sys/mbuf.h>
  45 #include <kern/locks.h>
  46
  47 #include <sys/sysctl.h>
  48
  49 #include <net/if.h>
  50
  51 #include <netat/sysglue.h>
  52 #include <netat/appletalk.h>
  53 #include <netat/at_pcb.h>
  54 #include <netat/at_var.h>
  55 #include <netat/ddp.h>
  56
  57
  58 /*
  59  * Dummy usrreqs struct created by Ted for FreeBSD 3.x integration.
  60  * Fill in supported functions as appropriate.
  61  */
  62 struct pr_usrreqs ddp_usrreqs = {
  63         ddp_pru_abort,  pru_accept_notsupp, ddp_pru_attach, ddp_pru_bind,
  64         ddp_pru_connect, pru_connect2_notsupp, ddp_pru_control, ddp_pru_detach,
  65         ddp_pru_disconnect, pru_listen_notsupp, ddp_pru_peeraddr, pru_rcvd_notsupp,
  66         pru_rcvoob_notsupp, ddp_pru_send, pru_sense_null, ddp_pru_shutdown,
  67         ddp_pru_sockaddr, sosend, soreceive, pru_sopoll_notsupp
  68 };
  69
  70 extern struct domain atalkdomain;
  71 extern void atalk_dominit(void);
  72
  73 struct protosw atalksw[] = {
  74   { SOCK_RAW,   &atalkdomain,   /*protocol*/ 0, PR_ATOMIC|PR_ADDR,
  75     /*input*/ 0, /*output*/ 0, /*clinput*/ 0, ddp_ctloutput,
  76     /*ousrreq*/ 0,
  77     ddp_init, /*fastto*/ 0, /*slowto*/ 0, /*drain*/ 0,
  78     /*sysctl*/ 0, &ddp_usrreqs,
  79         0, 0, 0, /*lock, unlock, getlock */
  80    {0, 0}, 0, {0} /* filters */
  81   }
  82 };
  83
  84 struct domain atalkdomain =
  85 { AF_APPLETALK,
  86   "appletalk",
  87   atalk_dominit,
  88   0,
  89   0,
  90   atalksw,
  91   0,
  92   0, /* dom_rtattach */
  93   0, 0, /* dom_rtoffset, dom_maxrtkey */
  94   DDP_X_HDR_SIZE, 0,
  95   0, /* domain global mutex */
  96   0,  /* domain flags */
  97   {0, 0} /*reserved[2] */
  98 };
  99
 100 struct domain * atalkdom = &atalkdomain;
 101 lck_mtx_t  *atalk_mutex = NULL;
 102
 103 lck_mtx_t *atalk_cluster_lock = NULL;
 104 static lck_attr_t *atalk_lock_attr;
 105 static lck_grp_t *atalk_lock_grp;
 106 static lck_grp_attr_t *atalk_lock_grp_attr;
 107
 108 static int at_saved_lock, at_saved_unlock;
 109
 110 SYSCTL_NODE(_net, PF_APPLETALK, appletalk, CTLFLAG_RW|CTLFLAG_LOCKED, 0, "AppleTalk Family");
 111
 112 void
 113 atalk_dominit(void)
 114 {
 115         atalk_mutex = atalkdom->dom_mtx;
 116
 117         atalk_lock_grp_attr = lck_grp_attr_alloc_init();
 118         atalk_lock_grp = lck_grp_alloc_init("appletalk", atalk_lock_grp_attr);
 119         atalk_lock_attr = lck_attr_alloc_init();
 120         atalk_cluster_lock = lck_mtx_alloc_init(atalk_lock_grp,
 121             atalk_lock_attr);
 122 }
 123
 124 void
 125 atalk_lock()
 126 {
 127         int lr_saved;
 128         lr_saved = (unsigned int) __builtin_return_address(0);
 129
 130         lck_mtx_assert(atalkdom->dom_mtx, LCK_MTX_ASSERT_NOTOWNED);
 131         lck_mtx_lock(atalkdom->dom_mtx);
 132         at_saved_lock = lr_saved;
 133 }
 134
 135 void
 136 atalk_unlock()
 137 {
 138         int lr_saved;
 139         lr_saved = (unsigned int) __builtin_return_address(0);
 140
 141         lck_mtx_assert(atalkdom->dom_mtx, LCK_MTX_ASSERT_OWNED);
 142         at_saved_unlock = lr_saved;
 143         lck_mtx_unlock(atalkdom->dom_mtx);
 144
 145 }
 146
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 150