bsd/netat/adsp_NewCID.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  * dspNewCID.c
  27  *
  28  * From v01.04 04/20/90 mbs
  29  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  30  */
  31
  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
  44 #include <netat/sysglue.h>
  45 #include <netat/appletalk.h>
  46 #include <netat/at_pcb.h>
  47 #include <netat/debug.h>
  48 #include <netat/adsp.h>
  49 #include <netat/adsp_internal.h>
  50
  51 /*
  52  * dspNewCID
  53  *
  54  * INPUTS:
  55  *      --> ccbRefNum           refnum of connection end
  56  *
  57  * OUTPUTS:
  58  *      <-- newCID              new connection identifier
  59  *
  60  * ERRORS:
  61  *      errRefNum               bad connection refnum
  62  *      errState                connection is not closed
  63  */
  64 int adspNewCID(sp, pb)          /* (DSPPBPtr pb) */
  65     CCBPtr              sp;
  66     struct adspcmd *pb;
  67 {
  68     if (sp == 0) {
  69         pb->ioResult = errRefNum;
  70         return EINVAL;
  71     }
  72
  73     if (sp->state != sClosed) { /* Can only assign to a closed connection */
  74         pb->ioResult = errState;
  75         return EINVAL;
  76     }
  77
  78     /*
  79      * Assign a unique connection ID to this ccb
  80      */
  81     sp->locCID = pb->u.newCIDParams.newcid = NextCID();
  82
  83     pb->ioResult = 0;
  84     adspioc_ack(0, pb->ioc, pb->gref);
  85     return 0;
  86 }