mDNSMacOS9/mDNSLibrary.c

   1 /*
   2  * Copyright (c) 2004 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     Change History (most recent first):
  26
  27 $Log: mDNSLibrary.c,v $
  28 Revision 1.1  2004/03/12 21:30:26  cheshire
  29 Build a System-Context Shared Library from mDNSCore, for the benefit of developers
  30 like Muse Research who want to be able to use mDNS/DNS-SD from GPL-licensed code.
  31
  32  */
  33
  34 // Define the required CFM Shared Library entry and exit points
  35 #include <CodeFragments.h>
  36 #include "mDNSClientAPI.h"                              // Defines the interface to the client layer above
  37 #include "mDNSMacOS9.h"                                 // Defines the specific types needed to run mDNS on this platform
  38
  39 mDNS mDNSStorage;
  40 static mDNS_PlatformSupport PlatformSupportStorage;
  41 #define RR_CACHE_SIZE 64
  42 static CacheRecord rrcachestorage[RR_CACHE_SIZE];
  43
  44 mDNSlocal void mDNS_StatusCallback(mDNS *const m, mStatus result)
  45         {
  46         if (result == mStatus_GrowCache)
  47                 {
  48                 // If we've run out of cache space, then double the total cache size and give the memory to mDNSCore
  49                 mDNSu32 numrecords = m->rrcache_size;
  50                 CacheRecord *storage = OTAllocMem(sizeof(CacheRecord) * numrecords);
  51                 LogMsg("mStatus_GrowCache %d", numrecords);
  52                 if (storage) mDNS_GrowCache(m, storage, numrecords);
  53                 }
  54         }
  55
  56 extern pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock);
  57 pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock)
  58         {
  59         extern pascal OSErr __initialize(const CFragInitBlock *theInitBlock);
  60         __initialize(theInitBlock);     // MUST do this first!
  61                 {
  62                 mStatus err;
  63                 THz oldZone = GetZone();
  64                 SetZone(SystemZone());
  65                 LogMsg("mDNS/DNS-SD with Macsbug breaks -- do not ship this version to customers");
  66                 err = mDNS_Init(&mDNSStorage, &PlatformSupportStorage, rrcachestorage, RR_CACHE_SIZE,
  67                         mDNS_Init_AdvertiseLocalAddresses, mDNS_StatusCallback, mDNS_Init_NoInitCallbackContext);
  68                 SetZone(oldZone);
  69                 return((OSErr)err);
  70                 }
  71         }
  72
  73 extern void mDNS_CFMTerm(void);
  74 void mDNS_CFMTerm(void)
  75         {
  76         extern pascal void  __terminate(void);
  77         LogMsg("mDNS_CFMTerm");
  78         mDNS_Close(&mDNSStorage);
  79         __terminate();
  80         }