LXR darwin-xnu/bsd/netat/adsp

   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 */
  61int 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}
  84