bsd/netat/adsp_CLListen.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 /* dspCLListen.c
  31  *
  32  * From Mike Shoemaker v01.02  04/19/90 mbs
  33  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  34  */
  35
  36 #include <sys/errno.h>
  37 #include <sys/types.h>
  38 #include <sys/param.h>
  39 #include <machine/spl.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/proc.h>
  43 #include <sys/filedesc.h>
  44 #include <sys/fcntl.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/socket.h>
  47
  48 #include <netat/sysglue.h>
  49 #include <netat/appletalk.h>
  50 #include <netat/at_pcb.h>
  51 #include <netat/debug.h>
  52 #include <netat/adsp.h>
  53 #include <netat/adsp_internal.h>
  54
  55 /*
  56  * dspCLListen
  57  *
  58  * INPUTS:
  59  *      --> ccbRefNum           refnum of connection end
  60  *      --> filterAddress       filter for incoming open connection requests
  61  *
  62  * OUTPUTS:
  63  *      <-- remoteCID           connection identifier of remote connection end
  64  *      <-- remoteAddress       internet address of remote connection end
  65  *      <-- sendSeq             initial send sequence number to use
  66  *      <-- sendWindow          initial size of remote end's receive buffer
  67  *      <-- attnSendSeq         initial attention send sequence number to use
  68  *
  69  * ERRORS:
  70  *      errRefNum               bad connection refnum
  71  *      errState                not a connection listener
  72  *      errAborted              request aborted by a Remove call
  73  */
  74 int adspCLListen(sp, pb)        /* (DSPPBPtr pb) */
  75     register CCBPtr sp;
  76     register struct adspcmd *pb;
  77 {
  78     register struct adspcmd *clpb;
  79     gbuf_t *mp;
  80     int s;
  81
  82     if (sp == 0) {
  83         pb->ioResult = errRefNum;
  84         return EINVAL;
  85     }
  86
  87     if (sp->state != sListening) { /* But this isn't a connection listener! */
  88         pb->ioResult = errState;
  89         return EALREADY;
  90     }
  91
  92     if (mp = gbuf_copym(pb->mp)) {      /* keep a copy of the parameter block */
  93             pb->ioResult = 1;   /* not done */
  94             adspioc_ack(0, pb->ioc, pb->gref); /* release user ioctl block */
  95             clpb = (struct adspcmd *)gbuf_rptr(mp);
  96             clpb->ioc = 0;
  97             clpb->mp = mp;
  98             ATDISABLE(s, sp->lock);
  99             if (qAddToEnd(&sp->opb, clpb)){     /* Add to list of listeners */
 100              ATENABLE(s, sp->lock);
 101                 return EFAULT; /* bogus, but discriminate from other errors */
 102             }
 103             ATENABLE(s, sp->lock);
 104     } else {
 105             pb->ioResult = errDSPQueueSize;
 106             return ENOBUFS;
 107     }
 108     return 0;
 109
 110 }