bsd/netat/adsp_CLListen.c

   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 /* dspCLListen.c
  23  *
  24  * From Mike Shoemaker v01.02  04/19/90 mbs
  25  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  26  */
  27
  28 #include <sys/errno.h>
  29 #include <sys/types.h>
  30 #include <sys/param.h>
  31 #include <machine/spl.h>
  32 #include <sys/systm.h>
  33 #include <sys/kernel.h>
  34 #include <sys/proc.h>
  35 #include <sys/filedesc.h>
  36 #include <sys/fcntl.h>
  37 #include <sys/mbuf.h>
  38 #include <sys/socket.h>
  39
  40 #include <netat/sysglue.h>
  41 #include <netat/appletalk.h>
  42 #include <netat/at_pcb.h>
  43 #include <netat/debug.h>
  44 #include <netat/adsp.h>
  45 #include <netat/adsp_internal.h>
  46
  47 /*
  48  * dspCLListen
  49  *
  50  * INPUTS:
  51  *      --> ccbRefNum           refnum of connection end
  52  *      --> filterAddress       filter for incoming open connection requests
  53  *
  54  * OUTPUTS:
  55  *      <-- remoteCID           connection identifier of remote connection end
  56  *      <-- remoteAddress       internet address of remote connection end
  57  *      <-- sendSeq             initial send sequence number to use
  58  *      <-- sendWindow          initial size of remote end's receive buffer
  59  *      <-- attnSendSeq         initial attention send sequence number to use
  60  *
  61  * ERRORS:
  62  *      errRefNum               bad connection refnum
  63  *      errState                not a connection listener
  64  *      errAborted              request aborted by a Remove call
  65  */
  66 int adspCLListen(sp, pb)        /* (DSPPBPtr pb) */
  67     register CCBPtr sp;
  68     register struct adspcmd *pb;
  69 {
  70     register struct adspcmd *clpb;
  71     gbuf_t *mp;
  72     int s;
  73
  74     if (sp == 0) {
  75         pb->ioResult = errRefNum;
  76         return EINVAL;
  77     }
  78
  79     if (sp->state != sListening) { /* But this isn't a connection listener! */
  80         pb->ioResult = errState;
  81         return EALREADY;
  82     }
  83
  84     if (mp = gbuf_copym(pb->mp)) {      /* keep a copy of the parameter block */
  85             pb->ioResult = 1;   /* not done */
  86             adspioc_ack(0, pb->ioc, pb->gref); /* release user ioctl block */
  87             clpb = (struct adspcmd *)gbuf_rptr(mp);
  88             clpb->ioc = 0;
  89             clpb->mp = mp;
  90             ATDISABLE(s, sp->lock);
  91             if (qAddToEnd(&sp->opb, clpb)){     /* Add to list of listeners */
  92              ATENABLE(s, sp->lock);
  93                 return EFAULT; /* bogus, but discriminate from other errors */
  94             }
  95             ATENABLE(s, sp->lock);
  96     } else {
  97             pb->ioResult = errDSPQueueSize;
  98             return ENOBUFS;
  99     }
 100     return 0;
 101
 102 }