bsd/netat/adsp_CLListen.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* dspCLListen.c
  24  *
  25  * From Mike Shoemaker v01.02  04/19/90 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  * dspCLListen
  50  *
  51  * INPUTS:
  52  *      --> ccbRefNum           refnum of connection end
  53  *      --> filterAddress       filter for incoming open connection requests
  54  *
  55  * OUTPUTS:
  56  *      <-- remoteCID           connection identifier of remote connection end
  57  *      <-- remoteAddress       internet address of remote connection end
  58  *      <-- sendSeq             initial send sequence number to use
  59  *      <-- sendWindow          initial size of remote end's receive buffer
  60  *      <-- attnSendSeq         initial attention send sequence number to use
  61  *
  62  * ERRORS:
  63  *      errRefNum               bad connection refnum
  64  *      errState                not a connection listener
  65  *      errAborted              request aborted by a Remove call
  66  */
  67 int adspCLListen(sp, pb)        /* (DSPPBPtr pb) */
  68     register CCBPtr sp;
  69     register struct adspcmd *pb;
  70 {
  71     register struct adspcmd *clpb;
  72     gbuf_t *mp;
  73     int s;
  74
  75     if (sp == 0) {
  76         pb->ioResult = errRefNum;
  77         return EINVAL;
  78     }
  79
  80     if (sp->state != sListening) { /* But this isn't a connection listener! */
  81         pb->ioResult = errState;
  82         return EALREADY;
  83     }
  84
  85     if (mp = gbuf_copym(pb->mp)) {      /* keep a copy of the parameter block */
  86             pb->ioResult = 1;   /* not done */
  87             adspioc_ack(0, pb->ioc, pb->gref); /* release user ioctl block */
  88             clpb = (struct adspcmd *)gbuf_rptr(mp);
  89             clpb->ioc = 0;
  90             clpb->mp = mp;
  91             ATDISABLE(s, sp->lock);
  92             if (qAddToEnd(&sp->opb, clpb)){     /* Add to list of listeners */
  93              ATENABLE(s, sp->lock);
  94                 return EFAULT; /* bogus, but discriminate from other errors */
  95             }
  96             ATENABLE(s, sp->lock);
  97     } else {
  98             pb->ioResult = errDSPQueueSize;
  99             return ENOBUFS;
 100     }
 101     return 0;
 102
 103 }