bsd/netat/adsp_CLListen.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* dspCLListen.c
  29  *
  30  * From Mike Shoemaker v01.02  04/19/90 mbs
  31  *   Modified, April 9, 1997 by Tuyen Nguyen for MacOSX.
  32  */
  33
  34 #include <sys/errno.h>
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <machine/spl.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/proc.h>
  41 #include <sys/filedesc.h>
  42 #include <sys/fcntl.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/socket.h>
  45
  46 #include <netat/sysglue.h>
  47 #include <netat/appletalk.h>
  48 #include <netat/at_pcb.h>
  49 #include <netat/debug.h>
  50 #include <netat/adsp.h>
  51 #include <netat/adsp_internal.h>
  52
  53 /*
  54  * dspCLListen
  55  *
  56  * INPUTS:
  57  *      --> ccbRefNum           refnum of connection end
  58  *      --> filterAddress       filter for incoming open connection requests
  59  *
  60  * OUTPUTS:
  61  *      <-- remoteCID           connection identifier of remote connection end
  62  *      <-- remoteAddress       internet address of remote connection end
  63  *      <-- sendSeq             initial send sequence number to use
  64  *      <-- sendWindow          initial size of remote end's receive buffer
  65  *      <-- attnSendSeq         initial attention send sequence number to use
  66  *
  67  * ERRORS:
  68  *      errRefNum               bad connection refnum
  69  *      errState                not a connection listener
  70  *      errAborted              request aborted by a Remove call
  71  */
  72 int adspCLListen(sp, pb)        /* (DSPPBPtr pb) */
  73     register CCBPtr sp;
  74     register struct adspcmd *pb;
  75 {
  76     register struct adspcmd *clpb;
  77     gbuf_t *mp;
  78
  79     if (sp == 0) {
  80         pb->ioResult = errRefNum;
  81         return EINVAL;
  82     }
  83
  84     if (sp->state != sListening) { /* But this isn't a connection listener! */
  85         pb->ioResult = errState;
  86         return EALREADY;
  87     }
  88
  89     if ((mp = gbuf_copym(pb->mp))) {    /* keep a copy of the parameter block */
  90             pb->ioResult = 1;   /* not done */
  91             adspioc_ack(0, (gbuf_t *)pb->ioc, pb->gref); /* release user ioctl block */
  92             clpb = (struct adspcmd *)gbuf_rptr(mp);
  93             clpb->ioc = 0;
  94             clpb->mp = mp;
  95             if (qAddToEnd((struct qlink **)&sp->opb, (struct qlink *)clpb))     /* Add to list of listeners */
  96                         return EFAULT; /* bogus, but discriminate from other errors */
  97     } else {
  98             pb->ioResult = errDSPQueueSize;
  99             return ENOBUFS;
 100     }
 101     return 0;
 102
 103 }