1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.
*/
#ifndef _MDNSSDLISTENER_H__
#define _MDNSSDLISTENER_H__
#include <android-base/thread_annotations.h>
#include <dns_sd.h>
#include <sysutils/FrameworkListener.h>
#include <mutex>
#include <string>
#include <thread>
#include "NetdCommand.h"
// callbacks
void MDnsSdListenerDiscoverCallback(DNSServiceRef sdRef, DNSServiceFlags flags, uint32_t ifIndex,
DNSServiceErrorType errorCode, const char* serviceName,
const char* regType, const char* replyDomain, void* inContext);
void MDnsSdListenerRegisterCallback(DNSServiceRef sdRef, DNSServiceFlags flags,
DNSServiceErrorType errorCode, const char *serviceName, const char *regType,
const char *domain, void *inContext);
void MDnsSdListenerResolveCallback(DNSServiceRef sdRef, DNSServiceFlags flags, uint32_t ifIndex,
DNSServiceErrorType errorCode, const char* fullname,
const char* hosttarget, uint16_t port, uint16_t txtLen,
const unsigned char* txtRecord, void* inContext);
void MDnsSdListenerSetHostnameCallback(DNSServiceRef, DNSServiceFlags flags,
DNSServiceErrorType errorCode, const char *hostname, void *inContext);
void MDnsSdListenerGetAddrInfoCallback(DNSServiceRef sdRef, DNSServiceFlags flags, uint32_t ifIndex,
DNSServiceErrorType errorCode, const char* hostname,
const struct sockaddr* const sa, uint32_t ttl,
void* inContext);
class MDnsSdListener {
public:
static constexpr const char* SOCKET_NAME = "mdns";
class Context {
public:
int mRefNumber;
Context(int refNumber) { mRefNumber = refNumber; }
~Context() {
}
};
int stop(int requestId);
int discover(uint32_t ifIndex, const char* regType, const char* domain, const int requestId,
const int requestFlags);
int serviceRegister(int requestId, const char* serviceName, const char* serviceType,
const char* domain, const char* host, int port,
const std::vector<unsigned char>& txtRecord, uint32_t ifIndex);
int resolveService(int requestId, uint32_t ifIndex, const char* serviceName,
const char* regType, const char* domain);
int getAddrInfo(int requestId, uint32_t ifIndex, uint32_t protocol, const char* hostname);
int startDaemon();
int stopDaemon();
private:
class Monitor {
public:
Monitor();
~Monitor();
DNSServiceRef *allocateServiceRef(int id, Context *c);
void startMonitoring(int id);
DNSServiceRef *lookupServiceRef(int id);
void freeServiceRef(int id);
int startService();
int stopService();
void run();
void deallocateServiceRef(DNSServiceRef* ref);
std::string threadName() { return std::string("MDnsSdMonitor"); }
private:
int rescan(); // returns the number of elements in the poll
struct Element {
Element(int id, Context* context) : mId(id), mContext(context) {}
~Element() { delete mContext; }
int mId;
Element* mNext = nullptr;
DNSServiceRef mRef = nullptr;
Context *mContext;
int mReady = 0;
};
Element* mHead GUARDED_BY(mMutex);
int mLiveCount;
struct pollfd *mPollFds;
DNSServiceRef **mPollRefs;
int mPollSize;
int mCtrlSocketPair[2];
std::mutex mMutex;
std::thread* mRescanThread;
};
Monitor mMonitor;
};
#endif
|
