bsd/netat/adsp_NewCID.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * dspNewCID.c
  30  *
  31  * From v01.04 04/20/90 mbs
  32  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  33  */
  34
  35 #include <sys/errno.h>
  36 #include <sys/types.h>
  37 #include <sys/param.h>
  38 #include <machine/spl.h>
  39 #include <sys/systm.h>
  40 #include <sys/kernel.h>
  41 #include <sys/proc.h>
  42 #include <sys/filedesc.h>
  43 #include <sys/fcntl.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/socket.h>
  46
  47 #include <netat/sysglue.h>
  48 #include <netat/appletalk.h>
  49 #include <netat/at_pcb.h>
  50 #include <netat/debug.h>
  51 #include <netat/adsp.h>
  52 #include <netat/adsp_internal.h>
  53
  54 /*
  55  * dspNewCID
  56  *
  57  * INPUTS:
  58  *      --> ccbRefNum           refnum of connection end
  59  *
  60  * OUTPUTS:
  61  *      <-- newCID              new connection identifier
  62  *
  63  * ERRORS:
  64  *      errRefNum               bad connection refnum
  65  *      errState                connection is not closed
  66  */
  67 int adspNewCID(sp, pb)          /* (DSPPBPtr pb) */
  68     CCBPtr              sp;
  69     struct adspcmd *pb;
  70 {
  71     if (sp == 0) {
  72         pb->ioResult = errRefNum;
  73         return EINVAL;
  74     }
  75
  76     if (sp->state != sClosed) { /* Can only assign to a closed connection */
  77         pb->ioResult = errState;
  78         return EINVAL;
  79     }
  80
  81     /*
  82      * Assign a unique connection ID to this ccb
  83      */
  84     sp->locCID = pb->u.newCIDParams.newcid = NextCID();
  85
  86     pb->ioResult = 0;
  87     adspioc_ack(0, pb->ioc, pb->gref);
  88     return 0;
  89 }