bsd/netat/aurp_cfg.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  *      Copyright (c) 1996 Apple Computer, Inc.
  27  *
  28  *              Created April 8, 1996 by Tuyen Nguyen
  29  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  30  *
  31  *      File: cfg.c
  32  */
  33 #define RESOLVE_DBG
  34 #include <sys/errno.h>
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <machine/spl.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/proc.h>
  41 #include <sys/filedesc.h>
  42 #include <sys/fcntl.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/socket.h>
  45 #include <sys/socketvar.h>
  46 #include <net/if.h>
  47
  48 #include <netat/sysglue.h>
  49 #include <netat/appletalk.h>
  50 #include <netat/at_var.h>
  51 #include <netat/routing_tables.h>
  52 #include <netat/at_pcb.h>
  53 #include <netat/aurp.h>
  54
  55 extern atlock_t aurpgen_lock;
  56 static int aurp_inited = 0;
  57 static char aurp_minor_no[4];
  58
  59 int aurp_open(gref)
  60         gref_t *gref;
  61 {
  62         extern void AURPcmdx();
  63         int i;
  64
  65         if (!aurp_inited) {
  66                 aurp_inited = 1;
  67                 ATLOCKINIT(aurpgen_lock);
  68         }
  69
  70         for (i=1; i < sizeof(aurp_minor_no); i++) {
  71                 if (aurp_minor_no[i] == 0) {
  72                         aurp_minor_no[i] = (char )i;
  73                         break;
  74                 }
  75         }
  76         if (i == sizeof(aurp_minor_no))
  77                 return EAGAIN;
  78         if (i == 1) {
  79                 aurp_gref = gref;
  80                 if (ddp_AURPfuncx(AURPCODE_REG, AURPcmdx, 0)) {
  81                         aurp_gref = 0;
  82                         aurp_minor_no[i] = 0;
  83                         return EPROTO;
  84                 }
  85         }
  86
  87         gref->info = (void *)&aurp_minor_no[i];
  88         return 0;
  89 }
  90
  91 int aurp_close(gref)
  92         gref_t *gref;
  93 {
  94         if (*(char *)gref->info == 1) {
  95                 aurp_gref = 0;
  96                 aurp_inited = 0;
  97                 ddp_AURPfuncx(AURPCODE_REG, 0, 0);
  98         }
  99
 100         *(char *)gref->info = 0;
 101         gref->info = 0;
 102         return 0;
 103 }