bsd/netat/adsp_CLListen.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 /* dspCLListen.c
  26  *
  27  * From Mike Shoemaker v01.02  04/19/90 mbs
  28  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  29  */
  30
  31 #include <sys/errno.h>
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <machine/spl.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/proc.h>
  38 #include <sys/filedesc.h>
  39 #include <sys/fcntl.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/socket.h>
  42
  43 #include <netat/sysglue.h>
  44 #include <netat/appletalk.h>
  45 #include <netat/at_pcb.h>
  46 #include <netat/debug.h>
  47 #include <netat/adsp.h>
  48 #include <netat/adsp_internal.h>
  49
  50 /*
  51  * dspCLListen
  52  *
  53  * INPUTS:
  54  *      --> ccbRefNum           refnum of connection end
  55  *      --> filterAddress       filter for incoming open connection requests
  56  *
  57  * OUTPUTS:
  58  *      <-- remoteCID           connection identifier of remote connection end
  59  *      <-- remoteAddress       internet address of remote connection end
  60  *      <-- sendSeq             initial send sequence number to use
  61  *      <-- sendWindow          initial size of remote end's receive buffer
  62  *      <-- attnSendSeq         initial attention send sequence number to use
  63  *
  64  * ERRORS:
  65  *      errRefNum               bad connection refnum
  66  *      errState                not a connection listener
  67  *      errAborted              request aborted by a Remove call
  68  */
  69 int adspCLListen(sp, pb)        /* (DSPPBPtr pb) */
  70     register CCBPtr sp;
  71     register struct adspcmd *pb;
  72 {
  73     register struct adspcmd *clpb;
  74     gbuf_t *mp;
  75     int s;
  76
  77     if (sp == 0) {
  78         pb->ioResult = errRefNum;
  79         return EINVAL;
  80     }
  81
  82     if (sp->state != sListening) { /* But this isn't a connection listener! */
  83         pb->ioResult = errState;
  84         return EALREADY;
  85     }
  86
  87     if (mp = gbuf_copym(pb->mp)) {      /* keep a copy of the parameter block */
  88             pb->ioResult = 1;   /* not done */
  89             adspioc_ack(0, pb->ioc, pb->gref); /* release user ioctl block */
  90             clpb = (struct adspcmd *)gbuf_rptr(mp);
  91             clpb->ioc = 0;
  92             clpb->mp = mp;
  93             ATDISABLE(s, sp->lock);
  94             if (qAddToEnd(&sp->opb, clpb)){     /* Add to list of listeners */
  95              ATENABLE(s, sp->lock);
  96                 return EFAULT; /* bogus, but discriminate from other errors */
  97             }
  98             ATENABLE(s, sp->lock);
  99     } else {
 100             pb->ioResult = errDSPQueueSize;
 101             return ENOBUFS;
 102     }
 103     return 0;
 104
 105 }