bsd/netat/adsp_NewCID.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * dspNewCID.c
  32  *
  33  * From v01.04 04/20/90 mbs
  34  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  35  */
  36
  37 #include <sys/errno.h>
  38 #include <sys/types.h>
  39 #include <sys/param.h>
  40 #include <machine/spl.h>
  41 #include <sys/systm.h>
  42 #include <sys/kernel.h>
  43 #include <sys/proc.h>
  44 #include <sys/filedesc.h>
  45 #include <sys/fcntl.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/socket.h>
  48
  49 #include <netat/sysglue.h>
  50 #include <netat/appletalk.h>
  51 #include <netat/at_pcb.h>
  52 #include <netat/debug.h>
  53 #include <netat/adsp.h>
  54 #include <netat/adsp_internal.h>
  55
  56 /*
  57  * dspNewCID
  58  *
  59  * INPUTS:
  60  *      --> ccbRefNum           refnum of connection end
  61  *
  62  * OUTPUTS:
  63  *      <-- newCID              new connection identifier
  64  *
  65  * ERRORS:
  66  *      errRefNum               bad connection refnum
  67  *      errState                connection is not closed
  68  */
  69 int adspNewCID(sp, pb)          /* (DSPPBPtr pb) */
  70     CCBPtr              sp;
  71     struct adspcmd *pb;
  72 {
  73     if (sp == 0) {
  74         pb->ioResult = errRefNum;
  75         return EINVAL;
  76     }
  77
  78     if (sp->state != sClosed) { /* Can only assign to a closed connection */
  79         pb->ioResult = errState;
  80         return EINVAL;
  81     }
  82
  83     /*
  84      * Assign a unique connection ID to this ccb
  85      */
  86     sp->locCID = pb->u.newCIDParams.newcid = NextCID();
  87
  88     pb->ioResult = 0;
  89     adspioc_ack(0, pb->ioc, pb->gref);
  90     return 0;
  91 }