15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/dns/dns_config_service.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/metrics/histogram.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/values.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/ip_endpoint.h" 11a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "net/base/ip_pattern.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace net { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 15a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)NameServerClassifier::NameServerClassifier() { 16a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Google Public DNS addresses from: 17a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // https://developers.google.com/speed/public-dns/docs/using 18a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("8.8.8.8", NAME_SERVERS_TYPE_GOOGLE_PUBLIC_DNS); 19a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("8.8.4.4", NAME_SERVERS_TYPE_GOOGLE_PUBLIC_DNS); 20a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("2001:4860:4860:0:0:0:0:8888", NAME_SERVERS_TYPE_GOOGLE_PUBLIC_DNS), 21a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("2001:4860:4860:0:0:0:0:8844", NAME_SERVERS_TYPE_GOOGLE_PUBLIC_DNS), 22a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 23a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Count localhost as private, since we don't know what upstream it uses: 24a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("127.*.*.*", NAME_SERVERS_TYPE_PRIVATE); 25a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("0:0:0:0:0:0:0:1", NAME_SERVERS_TYPE_PRIVATE); 26a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 27a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // RFC 1918 private addresses: 28a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("10.*.*.*", NAME_SERVERS_TYPE_PRIVATE); 29a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("172.[16-31].*.*", NAME_SERVERS_TYPE_PRIVATE); 30a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("192.168.*.*", NAME_SERVERS_TYPE_PRIVATE); 31a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 32a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // IPv4 link-local addresses: 33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("169.254.*.*", NAME_SERVERS_TYPE_PRIVATE); 34a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // IPv6 link-local addresses: 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("fe80:*:*:*:*:*:*:*", NAME_SERVERS_TYPE_PRIVATE); 37a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 38a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Anything else counts as public: 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("*.*.*.*", NAME_SERVERS_TYPE_PUBLIC); 40a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) AddRule("*:*:*:*:*:*:*:*", NAME_SERVERS_TYPE_PUBLIC); 41a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 42a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 43a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)NameServerClassifier::~NameServerClassifier() {} 44a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 45a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)NameServerClassifier::NameServersType NameServerClassifier::GetNameServersType( 46a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const std::vector<IPEndPoint>& nameservers) const { 47a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NameServersType type = NAME_SERVERS_TYPE_NONE; 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) for (std::vector<IPEndPoint>::const_iterator it = nameservers.begin(); 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) it != nameservers.end(); 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) ++it) { 51a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) type = MergeNameServersTypes(type, GetNameServerType(it->address())); 52a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 53a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return type; 54a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 56a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)struct NameServerClassifier::NameServerTypeRule { 57a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NameServerTypeRule(const char* pattern_string, NameServersType type) 58a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) : type(type) { 59a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool parsed = pattern.ParsePattern(pattern_string); 60a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(parsed); 61a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 62a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 63a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) IPPattern pattern; 64a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NameServersType type; 65a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)}; 66a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 67a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void NameServerClassifier::AddRule(const char* pattern_string, 68a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NameServersType address_type) { 69a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) rules_.push_back(new NameServerTypeRule(pattern_string, address_type)); 70a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 71a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 72a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)NameServerClassifier::NameServersType NameServerClassifier::GetNameServerType( 73a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) const IPAddressNumber& address) const { 74a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) for (ScopedVector<NameServerTypeRule>::const_iterator it = rules_.begin(); 75a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) it != rules_.end(); 76a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) ++it) { 77a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if ((*it)->pattern.Match(address)) 78a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return (*it)->type; 79a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 80a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NOTREACHED(); 81a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return NAME_SERVERS_TYPE_NONE; 82a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 83a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 84a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)NameServerClassifier::NameServersType 85a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)NameServerClassifier::MergeNameServersTypes(NameServersType a, 86a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NameServersType b) { 87a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (a == NAME_SERVERS_TYPE_NONE) 88a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return b; 89a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (b == NAME_SERVERS_TYPE_NONE) 90a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return a; 91a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (a == b) 92a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return a; 93a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return NAME_SERVERS_TYPE_MIXED; 94a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 95a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Default values are taken from glibc resolv.h except timeout which is set to 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// |kDnsTimeoutSeconds|. 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DnsConfig::DnsConfig() 993551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) : unhandled_options(false), 1003551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) append_to_multi_label_name(true), 101c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) randomize_ports(false), 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ndots(1), 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) timeout(base::TimeDelta::FromSeconds(kDnsTimeoutSeconds)), 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) attempts(2), 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rotate(false), 106d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) edns0(false), 107d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) use_local_ipv6(false) {} 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DnsConfig::~DnsConfig() {} 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool DnsConfig::Equals(const DnsConfig& d) const { 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return EqualsIgnoreHosts(d) && (hosts == d.hosts); 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool DnsConfig::EqualsIgnoreHosts(const DnsConfig& d) const { 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (nameservers == d.nameservers) && 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (search == d.search) && 1183551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) (unhandled_options == d.unhandled_options) && 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (append_to_multi_label_name == d.append_to_multi_label_name) && 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (ndots == d.ndots) && 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (timeout == d.timeout) && 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (attempts == d.attempts) && 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (rotate == d.rotate) && 124d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) (edns0 == d.edns0) && 125d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) (use_local_ipv6 == d.use_local_ipv6); 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfig::CopyIgnoreHosts(const DnsConfig& d) { 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) nameservers = d.nameservers; 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) search = d.search; 1313551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) unhandled_options = d.unhandled_options; 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) append_to_multi_label_name = d.append_to_multi_label_name; 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ndots = d.ndots; 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) timeout = d.timeout; 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) attempts = d.attempts; 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rotate = d.rotate; 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) edns0 = d.edns0; 138d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) use_local_ipv6 = d.use_local_ipv6; 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::Value* DnsConfig::ToValue() const { 1422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::DictionaryValue* dict = new base::DictionaryValue(); 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) base::ListValue* list = new base::ListValue(); 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < nameservers.size(); ++i) 1462a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) list->Append(new base::StringValue(nameservers[i].ToString())); 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->Set("nameservers", list); 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) list = new base::ListValue(); 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (size_t i = 0; i < search.size(); ++i) 1512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) list->Append(new base::StringValue(search[i])); 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->Set("search", list); 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1543551c9c881056c480085172ff9840cab31610854Torne (Richard Coles) dict->SetBoolean("unhandled_options", unhandled_options); 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->SetBoolean("append_to_multi_label_name", append_to_multi_label_name); 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->SetInteger("ndots", ndots); 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->SetDouble("timeout", timeout.InSecondsF()); 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->SetInteger("attempts", attempts); 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->SetBoolean("rotate", rotate); 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->SetBoolean("edns0", edns0); 161d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) dict->SetBoolean("use_local_ipv6", use_local_ipv6); 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dict->SetInteger("num_hosts", hosts.size()); 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return dict; 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DnsConfigService::DnsConfigService() 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : watch_failed_(false), 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) have_config_(false), 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) have_hosts_(false), 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) need_update_(false), 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_sent_empty_(true) {} 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)DnsConfigService::~DnsConfigService() { 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::ReadConfig(const CallbackType& callback) { 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!callback.is_null()); 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(callback_.is_null()); 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_ = callback; 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReadNow(); 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::WatchConfig(const CallbackType& callback) { 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!callback.is_null()); 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(callback_.is_null()); 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_ = callback; 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) watch_failed_ = !StartWatching(); 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReadNow(); 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::InvalidateConfig() { 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks now = base::TimeTicks::Now(); 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!last_invalidate_config_time_.is_null()) { 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_LONG_TIMES("AsyncDNS.ConfigNotifyInterval", 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) now - last_invalidate_config_time_); 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_invalidate_config_time_ = now; 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!have_config_) 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) have_config_ = false; 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StartTimer(); 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::InvalidateHosts() { 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks now = base::TimeTicks::Now(); 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!last_invalidate_hosts_time_.is_null()) { 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_LONG_TIMES("AsyncDNS.HostsNotifyInterval", 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) now - last_invalidate_hosts_time_); 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_invalidate_hosts_time_ = now; 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!have_hosts_) 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) have_hosts_ = false; 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StartTimer(); 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::OnConfigRead(const DnsConfig& config) { 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(config.IsValid()); 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool changed = false; 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!config.EqualsIgnoreHosts(dns_config_)) { 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dns_config_.CopyIgnoreHosts(config); 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) need_update_ = true; 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) changed = true; 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!changed && !last_sent_empty_time_.is_null()) { 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_LONG_TIMES("AsyncDNS.UnchangedConfigInterval", 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks::Now() - last_sent_empty_time_); 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_BOOLEAN("AsyncDNS.ConfigChange", changed); 238a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) UMA_HISTOGRAM_ENUMERATION( 239a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) "AsyncDNS.NameServersType", 240a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) classifier_.GetNameServersType(dns_config_.nameservers), 241a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NameServerClassifier::NAME_SERVERS_TYPE_MAX_VALUE); 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) have_config_ = true; 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (have_hosts_ || watch_failed_) 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OnCompleteConfig(); 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::OnHostsRead(const DnsHosts& hosts) { 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool changed = false; 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (hosts != dns_config_.hosts) { 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dns_config_.hosts = hosts; 2545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) need_update_ = true; 2555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) changed = true; 2565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!changed && !last_sent_empty_time_.is_null()) { 2585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_LONG_TIMES("AsyncDNS.UnchangedHostsInterval", 2595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks::Now() - last_sent_empty_time_); 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) UMA_HISTOGRAM_BOOLEAN("AsyncDNS.HostsChange", changed); 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) have_hosts_ = true; 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (have_config_ || watch_failed_) 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) OnCompleteConfig(); 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::StartTimer() { 2695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 2705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (last_sent_empty_) { 2715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!timer_.IsRunning()); 2725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; // No need to withdraw again. 2735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) timer_.Stop(); 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Give it a short timeout to come up with a valid config. Otherwise withdraw 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the config from the receiver. The goal is to avoid perceivable network 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // outage (when using the wrong config) but at the same time avoid 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // unnecessary Job aborts in HostResolverImpl. The signals come from multiple 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // sources so it might receive multiple events during a config change. 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // DHCP and user-induced changes are on the order of seconds, so 150ms should 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // not add perceivable delay. On the other hand, config readers should finish 2842a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // within 150ms with the rare exception of I/O block or extra large HOSTS. 2852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const base::TimeDelta kTimeout = base::TimeDelta::FromMilliseconds(150); 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) timer_.Start(FROM_HERE, 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kTimeout, 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) this, 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) &DnsConfigService::OnTimeout); 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::OnTimeout() { 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!last_sent_empty_); 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Indicate that even if there is no change in On*Read, we will need to 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // update the receiver when the config becomes complete. 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) need_update_ = true; 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Empty config is considered invalid. 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_sent_empty_ = true; 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_sent_empty_time_ = base::TimeTicks::Now(); 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_.Run(DnsConfig()); 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DnsConfigService::OnCompleteConfig() { 3065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) timer_.Stop(); 3075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!need_update_) 3085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 3095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) need_update_ = false; 3105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) last_sent_empty_ = false; 3115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (watch_failed_) { 3125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If a watch failed, the config may not be accurate, so report empty. 3135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_.Run(DnsConfig()); 3145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 3155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback_.Run(dns_config_); 3165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 3175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace net 3205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 321