mDNSMacOS9/mDNSLibrary.c

/* -*- Mode: C; tab-width: 4 -*-
 *
 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Define the required CFM Shared Library entry and exit points
#include <CodeFragments.h>
#include "mDNSEmbeddedAPI.h"            // Defines the interface to the client layer above
#include "mDNSMacOS9.h"                 // Defines the specific types needed to run mDNS on this platform

mDNS mDNSStorage;
static mDNS_PlatformSupport PlatformSupportStorage;
// Start off with a default cache of 16K (about 100 records)
#define RR_CACHE_SIZE ((16*1024) / sizeof(CacheRecord))
static CacheEntity rrcachestorage[RR_CACHE_SIZE];

mDNSlocal void mDNS_StatusCallback(mDNS *const m, mStatus result)
{
    if (result == mStatus_GrowCache)
    {
        // Allocate another chunk of cache storage
        CacheEntity *storage = OTAllocMem(sizeof(CacheEntity) * RR_CACHE_SIZE);
        if (storage) mDNS_GrowCache(m, storage, RR_CACHE_SIZE);
    }
}

extern pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock);
pascal OSErr mDNS_CFMInit(const CFragInitBlock *theInitBlock)
{
    extern pascal OSErr __initialize(const CFragInitBlock *theInitBlock);
    __initialize(theInitBlock); // MUST do this first!
    {
        mStatus err;
        THz oldZone = GetZone();
        SetZone(SystemZone());
        LogMsg("mDNS/DNS-SD with Macsbug breaks -- do not ship this version to customers");
        err = mDNS_Init(&mDNSStorage, &PlatformSupportStorage, rrcachestorage, RR_CACHE_SIZE,
                        mDNS_Init_AdvertiseLocalAddresses, mDNS_StatusCallback, mDNS_Init_NoInitCallbackContext);
        SetZone(oldZone);
        return((OSErr)err);
    }
}

extern void mDNS_CFMTerm(void);
void mDNS_CFMTerm(void)
{
    extern pascal void __terminate(void);
    LogMsg("mDNS_CFMTerm");
    mDNS_Close(&mDNSStorage);
    __terminate();
}