bsd/netat/aurp_cfg.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  *      Copyright (c) 1996 Apple Computer, Inc.
  24  *
  25  *              Created April 8, 1996 by Tuyen Nguyen
  26  *   Modified, March 17, 1997 by Tuyen Nguyen for MacOSX.
  27  *
  28  *      File: cfg.c
  29  */
  30 #define RESOLVE_DBG
  31 #include <sys/errno.h>
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <machine/spl.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/proc.h>
  38 #include <sys/filedesc.h>
  39 #include <sys/fcntl.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/socket.h>
  42 #include <sys/socketvar.h>
  43 #include <net/if.h>
  44
  45 #include <netat/sysglue.h>
  46 #include <netat/appletalk.h>
  47 #include <netat/at_var.h>
  48 #include <netat/routing_tables.h>
  49 #include <netat/at_pcb.h>
  50 #include <netat/aurp.h>
  51
  52 extern atlock_t aurpgen_lock;
  53 static int aurp_inited = 0;
  54 static char aurp_minor_no[4];
  55
  56 int aurp_open(gref)
  57         gref_t *gref;
  58 {
  59         extern void AURPcmdx();
  60         int i;
  61
  62         if (!aurp_inited) {
  63                 aurp_inited = 1;
  64                 ATLOCKINIT(aurpgen_lock);
  65         }
  66
  67         for (i=1; i < sizeof(aurp_minor_no); i++) {
  68                 if (aurp_minor_no[i] == 0) {
  69                         aurp_minor_no[i] = (char )i;
  70                         break;
  71                 }
  72         }
  73         if (i == sizeof(aurp_minor_no))
  74                 return EAGAIN;
  75         if (i == 1) {
  76                 aurp_gref = gref;
  77                 if (ddp_AURPfuncx(AURPCODE_REG, AURPcmdx, 0)) {
  78                         aurp_gref = 0;
  79                         aurp_minor_no[i] = 0;
  80                         return EPROTOTYPE;
  81                 }
  82         }
  83
  84         gref->info = (void *)&aurp_minor_no[i];
  85         return 0;
  86 }
  87
  88 int aurp_close(gref)
  89         gref_t *gref;
  90 {
  91         if (*(char *)gref->info == 1) {
  92                 aurp_gref = 0;
  93                 aurp_inited = 0;
  94                 ddp_AURPfuncx(AURPCODE_REG, 0, 0);
  95         }
  96
  97         *(char *)gref->info = 0;
  98         gref->info = 0;
  99         return 0;
 100 }