bsd/netat/adsp_NewCID.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  * dspNewCID.c
  24  *
  25  * From v01.04 04/20/90 mbs
  26  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  27  */
  28
  29 #include <sys/errno.h>
  30 #include <sys/types.h>
  31 #include <sys/param.h>
  32 #include <machine/spl.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/proc.h>
  36 #include <sys/filedesc.h>
  37 #include <sys/fcntl.h>
  38 #include <sys/mbuf.h>
  39 #include <sys/socket.h>
  40
  41 #include <netat/sysglue.h>
  42 #include <netat/appletalk.h>
  43 #include <netat/at_pcb.h>
  44 #include <netat/debug.h>
  45 #include <netat/adsp.h>
  46 #include <netat/adsp_internal.h>
  47
  48 /*
  49  * dspNewCID
  50  *
  51  * INPUTS:
  52  *      --> ccbRefNum           refnum of connection end
  53  *
  54  * OUTPUTS:
  55  *      <-- newCID              new connection identifier
  56  *
  57  * ERRORS:
  58  *      errRefNum               bad connection refnum
  59  *      errState                connection is not closed
  60  */
  61 int adspNewCID(sp, pb)          /* (DSPPBPtr pb) */
  62     CCBPtr              sp;
  63     struct adspcmd *pb;
  64 {
  65     if (sp == 0) {
  66         pb->ioResult = errRefNum;
  67         return EINVAL;
  68     }
  69
  70     if (sp->state != sClosed) { /* Can only assign to a closed connection */
  71         pb->ioResult = errState;
  72         return EINVAL;
  73     }
  74
  75     /*
  76      * Assign a unique connection ID to this ccb
  77      */
  78     sp->locCID = pb->u.newCIDParams.newcid = NextCID();
  79
  80     pb->ioResult = 0;
  81     adspioc_ack(0, pb->ioc, pb->gref);
  82     return 0;
  83 }