bsd/netat/aurp_cfg.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  *      Copyright (c) 1996 Apple Computer, Inc.
  32  *
  33  *              Created April 8, 1996 by Tuyen Nguyen
  34  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  35  *
  36  *      File: cfg.c
  37  */
  38 #define RESOLVE_DBG
  39 #include <sys/errno.h>
  40 #include <sys/types.h>
  41 #include <sys/param.h>
  42 #include <machine/spl.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/proc.h>
  46 #include <sys/filedesc.h>
  47 #include <sys/fcntl.h>
  48 #include <sys/mbuf.h>
  49 #include <sys/socket.h>
  50 #include <sys/socketvar.h>
  51 #include <net/if.h>
  52
  53 #include <netat/sysglue.h>
  54 #include <netat/appletalk.h>
  55 #include <netat/at_var.h>
  56 #include <netat/routing_tables.h>
  57 #include <netat/at_pcb.h>
  58 #include <netat/aurp.h>
  59
  60 extern atlock_t aurpgen_lock;
  61 static int aurp_inited = 0;
  62 static char aurp_minor_no[4];
  63
  64 int aurp_open(gref)
  65         gref_t *gref;
  66 {
  67         extern void AURPcmdx();
  68         int i;
  69
  70         if (!aurp_inited) {
  71                 aurp_inited = 1;
  72                 ATLOCKINIT(aurpgen_lock);
  73         }
  74
  75         for (i=1; i < sizeof(aurp_minor_no); i++) {
  76                 if (aurp_minor_no[i] == 0) {
  77                         aurp_minor_no[i] = (char )i;
  78                         break;
  79                 }
  80         }
  81         if (i == sizeof(aurp_minor_no))
  82                 return EAGAIN;
  83         if (i == 1) {
  84                 aurp_gref = gref;
  85                 if (ddp_AURPfuncx(AURPCODE_REG, AURPcmdx, 0)) {
  86                         aurp_gref = 0;
  87                         aurp_minor_no[i] = 0;
  88                         return EPROTOTYPE;
  89                 }
  90         }
  91
  92         gref->info = (void *)&aurp_minor_no[i];
  93         return 0;
  94 }
  95
  96 int aurp_close(gref)
  97         gref_t *gref;
  98 {
  99         if (*(char *)gref->info == 1) {
 100                 aurp_gref = 0;
 101                 aurp_inited = 0;
 102                 ddp_AURPfuncx(AURPCODE_REG, 0, 0);
 103         }
 104
 105         *(char *)gref->info = 0;
 106         gref->info = 0;
 107         return 0;
 108 }