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resolver_thread.h
1 
2 /***************************************************************************
3  * resolver_thread.h - Fawkes network name resolver thread
4  *
5  * Created: Fri May 11 22:10:03 2007
6  * Copyright 2006-2007 Tim Niemueller [www.niemueller.de]
7  *
8  ****************************************************************************/
9 
10 /* This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version. A runtime exception applies to
14  * this software (see LICENSE.GPL_WRE file mentioned below for details).
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU Library General Public License for more details.
20  *
21  * Read the full text in the LICENSE.GPL_WRE file in the doc directory.
22  */
23 
24 #ifndef __NETCOMM_UTILS_RESOLVER_THREAD_H_
25 #define __NETCOMM_UTILS_RESOLVER_THREAD_H_
26 
27 #include <core/threading/thread.h>
28 #include <core/utils/lock_hashset.h>
29 #include <core/utils/lock_hashmap.h>
30 #include <utils/misc/string_compare.h>
31 #ifdef HAVE_AVAHI
32 #include <netcomm/dns-sd/avahi_resolver_handler.h>
33 #endif
34 #include <sys/socket.h>
35 #include <netinet/in.h>
36 #include <stdint.h>
37 #include <cstddef>
38 #include <utility>
39 #include <map>
40 
41 namespace fawkes {
42 
43 class AvahiThread;
44 class NetworkNameResolver;
45 class Mutex;
46 
47 #ifdef HAVE_AVAHI
48 class NetworkNameResolverThread : public Thread, public AvahiResolverHandler
49 #else
51 #endif
52 {
53  public:
55  AvahiThread *avahi_thread = NULL);
57 
58  void resolve_name(const char *name);
59  void resolve_address(struct sockaddr *addr, socklen_t addrlen);
60 
61  bool resolve_name_immediately(const char *name,
62  struct sockaddr **addr, socklen_t *addr_len);
63  bool resolve_address_immediately(struct sockaddr *addr, socklen_t addr_len,
64  char **name, bool *namefound);
65 
66  virtual void resolved_name(char *name, struct sockaddr *addr, socklen_t addrlen);
67  virtual void resolved_address(struct sockaddr_in *addr, socklen_t addrlen, char *name);
68  virtual void name_resolution_failed(char *name);
69  virtual void address_resolution_failed(struct sockaddr_in *addr, socklen_t addrlen);
70 
71  virtual void loop();
72 
73  /** Stub to see name in backtrace for easier debugging. @see Thread::run() */
74  protected: virtual void run() { Thread::run(); }
75 
76  private:
77  NetworkNameResolver *__resolver;
78 #ifdef HAVE_AVAHI
79  AvahiThread *__avahi_thread;
80 #endif
81 
82  Mutex *__namesq_mutex;
83  unsigned int __namesq_active;
84 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2)
86 #else
88 #endif
89  NamesQMap __namesqs[2];
90  NamesQMap *__namesq;
91  NamesQMap *__namesq_proc;
92 
93 
94  Mutex *__addrq_mutex;
95  unsigned int __addrq_active;
96  typedef std::map<uint32_t, std::pair<struct sockaddr *, socklen_t> > AddrQMap;
97  AddrQMap __addrqs[2];
98  AddrQMap *__addrq;
99  AddrQMap *__addrq_proc;
100 };
101 
102 } // end namespace fawkes
103 
104 #endif
NetworkNameResolverThread(NetworkNameResolver *resolver, AvahiThread *avahi_thread=NULL)
Constructor.
void resolve_address(struct sockaddr *addr, socklen_t addrlen)
Enqueue address for resolution.
virtual void name_resolution_failed(char *name)
Name resolution failed.
String equality checker.
virtual void run()
Code to execute in the thread.
Definition: thread.cpp:918
Thread class encapsulation of pthreads.
Definition: thread.h:42
Worker thread for NetworkNameResolver.
virtual void resolved_name(char *name, struct sockaddr *addr, socklen_t addrlen)
Name has been successfully resolved.
virtual void address_resolution_failed(struct sockaddr_in *addr, socklen_t addrlen)
Address resolution failed.
bool resolve_address_immediately(struct sockaddr *addr, socklen_t addr_len, char **name, bool *namefound)
Immediately resolve address.
Avahi main thread.
Definition: avahi_thread.h:55
void resolve_name(const char *name)
Enqueue name for resolution.
const char * name() const
Get name of thread.
Definition: thread.h:95
Network name and address resolver.
Definition: resolver.h:48
Hash set with a lock.
Definition: lock_hashset.h:47
virtual void resolved_address(struct sockaddr_in *addr, socklen_t addrlen, char *name)
Address has been successfully resolved.
Mutex mutual exclusion lock.
Definition: mutex.h:32
virtual void run()
Stub to see name in backtrace for easier debugging.
bool resolve_name_immediately(const char *name, struct sockaddr **addr, socklen_t *addr_len)
Immediately resolve a name.
virtual void loop()
Thread loop.