122 lines
4.2 KiB
C++
122 lines
4.2 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _MDNSSDLISTENER_H__
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#define _MDNSSDLISTENER_H__
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#include <android-base/thread_annotations.h>
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#include <dns_sd.h>
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#include <sysutils/FrameworkListener.h>
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#include <mutex>
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#include <string>
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#include "NetdCommand.h"
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// callbacks
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void MDnsSdListenerDiscoverCallback(DNSServiceRef sdRef, DNSServiceFlags flags, uint32_t ifIndex,
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DNSServiceErrorType errorCode, const char* serviceName,
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const char* regType, const char* replyDomain, void* inContext);
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void MDnsSdListenerRegisterCallback(DNSServiceRef sdRef, DNSServiceFlags flags,
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DNSServiceErrorType errorCode, const char *serviceName, const char *regType,
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const char *domain, void *inContext);
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void MDnsSdListenerResolveCallback(DNSServiceRef sdRef, DNSServiceFlags flags, uint32_t ifIndex,
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DNSServiceErrorType errorCode, const char* fullname,
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const char* hosttarget, uint16_t port, uint16_t txtLen,
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const unsigned char* txtRecord, void* inContext);
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void MDnsSdListenerSetHostnameCallback(DNSServiceRef, DNSServiceFlags flags,
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DNSServiceErrorType errorCode, const char *hostname, void *inContext);
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void MDnsSdListenerGetAddrInfoCallback(DNSServiceRef sdRef, DNSServiceFlags flags, uint32_t ifIndex,
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DNSServiceErrorType errorCode, const char* hostname,
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const struct sockaddr* const sa, uint32_t ttl,
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void* inContext);
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class MDnsSdListener {
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public:
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static constexpr const char* SOCKET_NAME = "mdns";
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class Context {
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public:
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int mRefNumber;
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Context(int refNumber) { mRefNumber = refNumber; }
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~Context() {
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}
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};
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int stop(int requestId);
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int discover(uint32_t ifIndex, const char* regType, const char* domain, const int requestId,
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const int requestFlags);
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int serviceRegister(int requestId, const char* serviceName, const char* serviceType,
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const char* domain, const char* host, int port,
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const std::vector<unsigned char>& txtRecord, uint32_t ifIndex);
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int resolveService(int requestId, uint32_t ifIndex, const char* serviceName,
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const char* regType, const char* domain);
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int getAddrInfo(int requestId, uint32_t ifIndex, uint32_t protocol, const char* hostname);
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int startDaemon();
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int stopDaemon();
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private:
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class Monitor {
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public:
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Monitor();
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virtual ~Monitor() {}
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DNSServiceRef *allocateServiceRef(int id, Context *c);
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void startMonitoring(int id);
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DNSServiceRef *lookupServiceRef(int id);
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void freeServiceRef(int id);
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int startService();
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int stopService();
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void run();
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void deallocateServiceRef(DNSServiceRef* ref);
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std::string threadName() { return std::string("MDnsSdMonitor"); }
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private:
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int rescan(); // returns the number of elements in the poll
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struct Element {
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Element(int id, Context* context) : mId(id), mContext(context) {}
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~Element() { delete mContext; }
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int mId;
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Element* mNext = nullptr;
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DNSServiceRef mRef = nullptr;
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Context *mContext;
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int mReady = 0;
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};
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Element* mHead GUARDED_BY(mMutex);
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int mLiveCount;
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struct pollfd *mPollFds;
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DNSServiceRef **mPollRefs;
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int mPollSize;
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int mCtrlSocketPair[2];
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std::mutex mMutex;
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};
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Monitor mMonitor;
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};
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#endif
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