mDNSMacOSX/DNS64.h

   1 /*
   2  * Copyright (c) 2017-2019 Apple Inc. All rights reserved.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef __DNS64_h
  18 #define __DNS64_h
  19
  20 #include "mDNSEmbeddedAPI.h"
  21
  22 #define DNS64IsQueryingARecord(STATE)       (((STATE) == kDNS64State_QueryA) || ((STATE) == kDNS64State_QueryA2))
  23 #define DNS64ShouldAnswerQuestion(Q, RR)    (DNS64IsQueryingARecord((Q)->dns64.state) && ((RR)->rrtype == kDNSType_A))
  24
  25 #ifdef  __cplusplus
  26 extern "C" {
  27 #endif
  28
  29 mDNSexport mDNSBool DNS64StateMachine(mDNS *m, DNSQuestion *inQ, const ResourceRecord *inRR, QC_result inResult);
  30 mDNSexport mStatus  DNS64AnswerCurrentQuestion(mDNS *m, const ResourceRecord *inRR, QC_result inResult);
  31 mDNSexport void     DNS64HandleNewQuestion(mDNS *m, DNSQuestion *inQ);
  32 mDNSexport void     DNS64ResetState(DNSQuestion *inQ);
  33 #if !MDNSRESPONDER_SUPPORTS(APPLE, QUERIER)
  34 mDNSexport void     DNS64RestartQuestions(mDNS *m);
  35 #endif
  36
  37 #ifdef  __cplusplus
  38 }
  39 #endif
  40
  41 #endif // __DNS64_h