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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // See header file for description of class | |
| 6 | |
| 7 #include <ws2tcpip.h> | |
| 8 #include <Wspiapi.h> // Needed for win2k compatibility | |
| 9 | |
| 10 #include "chrome/browser/net/dns_slave.h" | |
| 11 | |
| 12 #include "base/logging.h" | |
| 13 #include "base/platform_thread.h" | |
| 14 #include "base/string_util.h" | |
| 15 #include "chrome/browser/net/dns_host_info.h" | |
| 16 #include "chrome/browser/net/dns_master.h" | |
| 17 | |
| 18 | |
| 19 namespace chrome_browser_net { | |
| 20 | |
| 21 //------------------------------------------------------------------------------ | |
| 22 // We supply a functions for stubbing network callbacks, so that offline testing | |
| 23 // can be performed. | |
| 24 //------------------------------------------------------------------------------ | |
| 25 static GetAddrInfoFunction get_addr = getaddrinfo; | |
| 26 static FreeAddrInfoFunction free_addr = freeaddrinfo; | |
| 27 void SetAddrinfoCallbacks(GetAddrInfoFunction getaddrinfo, | |
| 28 FreeAddrInfoFunction freeaddrinfo) { | |
| 29 get_addr = getaddrinfo; | |
| 30 free_addr = freeaddrinfo; | |
| 31 } | |
| 32 | |
| 33 GetAddrInfoFunction get_getaddrinfo() {return get_addr;} | |
| 34 FreeAddrInfoFunction get_freeaddrinfo() {return free_addr;} | |
| 35 | |
| 36 | |
| 37 //------------------------------------------------------------------------------ | |
| 38 // This is the entry method used by DnsMaster to start our thread. | |
| 39 //------------------------------------------------------------------------------ | |
| 40 | |
| 41 DWORD __stdcall DnsSlave::ThreadStart(void* pThis) { | |
| 42 DnsSlave* slave_instance = reinterpret_cast<DnsSlave*>(pThis); | |
| 43 return slave_instance->Run(); | |
| 44 } | |
| 45 | |
| 46 //------------------------------------------------------------------------------ | |
| 47 // The following are methods on the DnsPrefetch class. | |
| 48 //------------------------------------------------------------------------------ | |
| 49 | |
| 50 unsigned DnsSlave::Run() { | |
| 51 DCHECK(slave_index_ >= 0 && slave_index_ < DnsMaster::kSlaveCountMax); | |
| 52 | |
| 53 std::string name = StringPrintf( | |
| 54 "dns_prefetcher_%d_of_%d", slave_index_ + 1, DnsMaster::kSlaveCountMax); | |
| 55 DLOG(INFO) << "Now Running " << name; | |
| 56 PlatformThread::SetName(name.c_str()); | |
| 57 | |
| 58 while (master_->GetNextAssignment(&hostname_)) { | |
| 59 BlockingDnsLookup(); | |
| 60 } | |
| 61 // GetNextAssignment() fails when we are told to terminate. | |
| 62 master_->SetSlaveHasTerminated(slave_index_); | |
| 63 return 0; | |
| 64 } | |
| 65 | |
| 66 void DnsSlave::BlockingDnsLookup() { | |
| 67 const char* port = "80"; // I may need to get the real port | |
| 68 addrinfo* result = NULL; | |
| 69 | |
| 70 int error_code = get_addr(hostname_.c_str(), port, NULL, &result); | |
| 71 | |
| 72 // Note that since info has value semantics, I need to ask | |
| 73 // master_ to set the new states atomically in its map. | |
| 74 switch (error_code) { | |
| 75 case 0: | |
| 76 master_->SetFoundState(hostname_); | |
| 77 break; | |
| 78 | |
| 79 default: | |
| 80 DCHECK_EQ(0, error_code) << "surprising output" ; | |
| 81 // fall through | |
| 82 | |
| 83 case WSAHOST_NOT_FOUND: | |
| 84 master_->SetNoSuchNameState(hostname_); | |
| 85 break; | |
| 86 } | |
| 87 | |
| 88 // We don't save results, so lets free them... | |
| 89 if (result) { | |
| 90 free_addr(result); | |
| 91 result = NULL; | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 } // namespace chrome_browser_net | |
| 96 | |
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Chromium Code Reviews
Issue 15076:
Clean up dns prefetch code, and also port it. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/