mDNSMacOS9/mDNSLibrary.c

   1 /*
   2  * Copyright (c) 2004 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     Change History (most recent first):
  24
  25 $Log: mDNSLibrary.c,v $
  26 Revision 1.2  2004/09/17 01:08:50  cheshire
  27 Renamed mDNSClientAPI.h to mDNSEmbeddedAPI.h
  28   The name "mDNSClientAPI.h" is misleading to new developers looking at this code. The interfaces
  29   declared in that file are ONLY appropriate to single-address-space embedded applications.
  30   For clients on general-purpose computers, the interfaces defined in dns_sd.h should be used.
  31
  32 Revision 1.1  2004/03/12 21:30:26  cheshire
  33 Build a System-Context Shared Library from mDNSCore, for the benefit of developers
  34 like Muse Research who want to be able to use mDNS/DNS-SD from GPL-licensed code.
  35
  36  */
  37
  38 // Define the required CFM Shared Library entry and exit points
  39 #include <CodeFragments.h>
  40 #include "mDNSEmbeddedAPI.h"                    // Defines the interface to the client layer above
  41 #include "mDNSMacOS9.h"                                 // Defines the specific types needed to run mDNS on this platform
  42
  43 mDNS mDNSStorage;
  44 static mDNS_PlatformSupport PlatformSupportStorage;
  45 #define RR_CACHE_SIZE 64
  46 static CacheRecord rrcachestorage[RR_CACHE_SIZE];
  47
  48 mDNSlocal void mDNS_StatusCallback(mDNS *const m, mStatus result)
  49         {
  50         if (result == mStatus_GrowCache)
  51                 {
  52                 // If we've run out of cache space, then double the total cache size and give the memory to mDNSCore
  53                 mDNSu32 numrecords = m->rrcache_size;
  54                 CacheRecord *storage = OTAllocMem(sizeof(CacheRecord) * numrecords);
  55                 LogMsg("mStatus_GrowCache %d", numrecords);
  56                 if (storage) mDNS_GrowCache(m, storage, numrecords);
  57                 }
  58         }
  59
  60 extern pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock);
  61 pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock)
  62         {
  63         extern pascal OSErr __initialize(const CFragInitBlock *theInitBlock);
  64         __initialize(theInitBlock);     // MUST do this first!
  65                 {
  66                 mStatus err;
  67                 THz oldZone = GetZone();
  68                 SetZone(SystemZone());
  69                 LogMsg("mDNS/DNS-SD with Macsbug breaks -- do not ship this version to customers");
  70                 err = mDNS_Init(&mDNSStorage, &PlatformSupportStorage, rrcachestorage, RR_CACHE_SIZE,
  71                         mDNS_Init_AdvertiseLocalAddresses, mDNS_StatusCallback, mDNS_Init_NoInitCallbackContext);
  72                 SetZone(oldZone);
  73                 return((OSErr)err);
  74                 }
  75         }
  76
  77 extern void mDNS_CFMTerm(void);
  78 void mDNS_CFMTerm(void)
  79         {
  80         extern pascal void  __terminate(void);
  81         LogMsg("mDNS_CFMTerm");
  82         mDNS_Close(&mDNSStorage);
  83         __terminate();
  84         }