bsd/netat/aurp_cfg.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  *      Copyright (c) 1996 Apple Computer, Inc.
  25  *
  26  *              Created April 8, 1996 by Tuyen Nguyen
  27  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  28  *
  29  *      File: cfg.c
  30  */
  31 #define RESOLVE_DBG
  32 #include <sys/errno.h>
  33 #include <sys/types.h>
  34 #include <sys/param.h>
  35 #include <machine/spl.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/proc.h>
  39 #include <sys/filedesc.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/socket.h>
  43 #include <sys/socketvar.h>
  44 #include <net/if.h>
  45
  46 #include <netat/sysglue.h>
  47 #include <netat/appletalk.h>
  48 #include <netat/at_var.h>
  49 #include <netat/routing_tables.h>
  50 #include <netat/at_pcb.h>
  51 #include <netat/aurp.h>
  52
  53 extern atlock_t aurpgen_lock;
  54 static int aurp_inited = 0;
  55 static char aurp_minor_no[4];
  56
  57 int aurp_open(gref)
  58         gref_t *gref;
  59 {
  60         extern void AURPcmdx();
  61         int i;
  62
  63         if (!aurp_inited) {
  64                 aurp_inited = 1;
  65                 ATLOCKINIT(aurpgen_lock);
  66         }
  67
  68         for (i=1; i < sizeof(aurp_minor_no); i++) {
  69                 if (aurp_minor_no[i] == 0) {
  70                         aurp_minor_no[i] = (char )i;
  71                         break;
  72                 }
  73         }
  74         if (i == sizeof(aurp_minor_no))
  75                 return EAGAIN;
  76         if (i == 1) {
  77                 aurp_gref = gref;
  78                 if (ddp_AURPfuncx(AURPCODE_REG, AURPcmdx, 0)) {
  79                         aurp_gref = 0;
  80                         aurp_minor_no[i] = 0;
  81                         return EPROTOTYPE;
  82                 }
  83         }
  84
  85         gref->info = (void *)&aurp_minor_no[i];
  86         return 0;
  87 }
  88
  89 int aurp_close(gref)
  90         gref_t *gref;
  91 {
  92         if (*(char *)gref->info == 1) {
  93                 aurp_gref = 0;
  94                 aurp_inited = 0;
  95                 ddp_AURPfuncx(AURPCODE_REG, 0, 0);
  96         }
  97
  98         *(char *)gref->info = 0;
  99         gref->info = 0;
 100         return 0;
 101 }