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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef NET_DNS_HOST_RESOLVER_IMPL_H_ | 5 #ifndef NET_DNS_HOST_RESOLVER_IMPL_H_ |
6 #define NET_DNS_HOST_RESOLVER_IMPL_H_ | 6 #define NET_DNS_HOST_RESOLVER_IMPL_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
11 #include <map> | 11 #include <map> |
12 #include <memory> | 12 #include <memory> |
13 | 13 |
14 #include "base/macros.h" | 14 #include "base/macros.h" |
15 #include "base/memory/weak_ptr.h" | 15 #include "base/memory/weak_ptr.h" |
16 #include "base/strings/string_piece.h" | 16 #include "base/strings/string_piece.h" |
17 #include "base/threading/non_thread_safe.h" | 17 #include "base/threading/thread_checker.h" |
18 #include "base/time/time.h" | 18 #include "base/time/time.h" |
19 #include "base/timer/timer.h" | 19 #include "base/timer/timer.h" |
20 #include "net/base/net_export.h" | 20 #include "net/base/net_export.h" |
21 #include "net/base/network_change_notifier.h" | 21 #include "net/base/network_change_notifier.h" |
22 #include "net/dns/host_cache.h" | 22 #include "net/dns/host_cache.h" |
23 #include "net/dns/host_resolver.h" | 23 #include "net/dns/host_resolver.h" |
24 #include "net/dns/host_resolver_proc.h" | 24 #include "net/dns/host_resolver_proc.h" |
25 | 25 |
26 namespace net { | 26 namespace net { |
27 | 27 |
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54 // | 54 // |
55 // Thread safety: This class is not threadsafe, and must only be called | 55 // Thread safety: This class is not threadsafe, and must only be called |
56 // from one thread! | 56 // from one thread! |
57 // | 57 // |
58 // The HostResolverImpl enforces limits on the maximum number of concurrent | 58 // The HostResolverImpl enforces limits on the maximum number of concurrent |
59 // threads using PrioritizedDispatcher::Limits. | 59 // threads using PrioritizedDispatcher::Limits. |
60 // | 60 // |
61 // Jobs are ordered in the queue based on their priority and order of arrival. | 61 // Jobs are ordered in the queue based on their priority and order of arrival. |
62 class NET_EXPORT HostResolverImpl | 62 class NET_EXPORT HostResolverImpl |
63 : public HostResolver, | 63 : public HostResolver, |
64 NON_EXPORTED_BASE(public base::NonThreadSafe), | |
65 public NetworkChangeNotifier::IPAddressObserver, | 64 public NetworkChangeNotifier::IPAddressObserver, |
66 public NetworkChangeNotifier::ConnectionTypeObserver, | 65 public NetworkChangeNotifier::ConnectionTypeObserver, |
67 public NetworkChangeNotifier::DNSObserver { | 66 public NetworkChangeNotifier::DNSObserver { |
68 public: | 67 public: |
69 // Parameters for ProcTask which resolves hostnames using HostResolveProc. | 68 // Parameters for ProcTask which resolves hostnames using HostResolveProc. |
70 // | 69 // |
71 // |resolver_proc| is used to perform the actual resolves; it must be | 70 // |resolver_proc| is used to perform the actual resolves; it must be |
72 // thread-safe since it may be run from multiple worker threads. If | 71 // thread-safe since it may be run from multiple worker threads. If |
73 // |resolver_proc| is NULL then the default host resolver procedure is | 72 // |resolver_proc| is NULL then the default host resolver procedure is |
74 // used (which is SystemHostResolverProc except if overridden). | 73 // used (which is SystemHostResolverProc except if overridden). |
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375 // tasks, but can be overridden for tests. | 374 // tasks, but can be overridden for tests. |
376 scoped_refptr<base::TaskRunner> worker_task_runner_; | 375 scoped_refptr<base::TaskRunner> worker_task_runner_; |
377 | 376 |
378 std::map<const HostCache::Key, std::vector<RequestInfo::CacheHitCallback>> | 377 std::map<const HostCache::Key, std::vector<RequestInfo::CacheHitCallback>> |
379 cache_hit_callbacks_; | 378 cache_hit_callbacks_; |
380 | 379 |
381 bool persist_initialized_; | 380 bool persist_initialized_; |
382 PersistCallback persist_callback_; | 381 PersistCallback persist_callback_; |
383 base::OneShotTimer persist_timer_; | 382 base::OneShotTimer persist_timer_; |
384 | 383 |
| 384 THREAD_CHECKER(thread_checker_); |
| 385 |
385 base::WeakPtrFactory<HostResolverImpl> weak_ptr_factory_; | 386 base::WeakPtrFactory<HostResolverImpl> weak_ptr_factory_; |
386 | 387 |
387 base::WeakPtrFactory<HostResolverImpl> probe_weak_ptr_factory_; | 388 base::WeakPtrFactory<HostResolverImpl> probe_weak_ptr_factory_; |
388 | 389 |
389 DISALLOW_COPY_AND_ASSIGN(HostResolverImpl); | 390 DISALLOW_COPY_AND_ASSIGN(HostResolverImpl); |
390 }; | 391 }; |
391 | 392 |
392 // Resolves a local hostname (such as "localhost" or "localhost6") into | 393 // Resolves a local hostname (such as "localhost" or "localhost6") into |
393 // IP endpoints with the given port. Returns true if |host| is a local | 394 // IP endpoints with the given port. Returns true if |host| is a local |
394 // hostname and false otherwise. Special IPv6 names (e.g. "localhost6") | 395 // hostname and false otherwise. Special IPv6 names (e.g. "localhost6") |
395 // will resolve to an IPv6 address only, whereas other names will | 396 // will resolve to an IPv6 address only, whereas other names will |
396 // resolve to both IPv4 and IPv6. | 397 // resolve to both IPv4 and IPv6. |
397 // This function is only exposed so it can be unit-tested. | 398 // This function is only exposed so it can be unit-tested. |
398 // TODO(tfarina): It would be better to change the tests so this function | 399 // TODO(tfarina): It would be better to change the tests so this function |
399 // gets exercised indirectly through HostResolverImpl. | 400 // gets exercised indirectly through HostResolverImpl. |
400 NET_EXPORT_PRIVATE bool ResolveLocalHostname(base::StringPiece host, | 401 NET_EXPORT_PRIVATE bool ResolveLocalHostname(base::StringPiece host, |
401 uint16_t port, | 402 uint16_t port, |
402 AddressList* address_list); | 403 AddressList* address_list); |
403 | 404 |
404 } // namespace net | 405 } // namespace net |
405 | 406 |
406 #endif // NET_DNS_HOST_RESOLVER_IMPL_H_ | 407 #endif // NET_DNS_HOST_RESOLVER_IMPL_H_ |
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