mDNSMacOS9/mDNSLibrary.c

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16
  17     Change History (most recent first):
  18
  19 $Log: mDNSLibrary.c,v $
  20 Revision 1.4  2006/08/14 23:24:29  cheshire
  21 Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
  22
  23 Revision 1.3  2004/12/16 20:49:35  cheshire
  24 <rdar://problem/3324626> Cache memory management improvements
  25
  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 // Start off with a default cache of 16K (about 100 records)
  46 #define RR_CACHE_SIZE ((16*1024) / sizeof(CacheRecord))
  47 static CacheEntity rrcachestorage[RR_CACHE_SIZE];
  48
  49 mDNSlocal void mDNS_StatusCallback(mDNS *const m, mStatus result)
  50         {
  51         if (result == mStatus_GrowCache)
  52                 {
  53                 // Allocate another chunk of cache storage
  54                 CacheEntity *storage = OTAllocMem(sizeof(CacheEntity) * RR_CACHE_SIZE);
  55                 if (storage) mDNS_GrowCache(m, storage, RR_CACHE_SIZE);
  56                 }
  57         }
  58
  59 extern pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock);
  60 pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock)
  61         {
  62         extern pascal OSErr __initialize(const CFragInitBlock *theInitBlock);
  63         __initialize(theInitBlock);     // MUST do this first!
  64                 {
  65                 mStatus err;
  66                 THz oldZone = GetZone();
  67                 SetZone(SystemZone());
  68                 LogMsg("mDNS/DNS-SD with Macsbug breaks -- do not ship this version to customers");
  69                 err = mDNS_Init(&mDNSStorage, &PlatformSupportStorage, rrcachestorage, RR_CACHE_SIZE,
  70                         mDNS_Init_AdvertiseLocalAddresses, mDNS_StatusCallback, mDNS_Init_NoInitCallbackContext);
  71                 SetZone(oldZone);
  72                 return((OSErr)err);
  73                 }
  74         }
  75
  76 extern void mDNS_CFMTerm(void);
  77 void mDNS_CFMTerm(void)
  78         {
  79         extern pascal void  __terminate(void);
  80         LogMsg("mDNS_CFMTerm");
  81         mDNS_Close(&mDNSStorage);
  82         __terminate();
  83         }