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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/dns/host_resolver.h"
#include <algorithm>
#include <optional>
#include <set>
#include <string>
#include <string_view>
#include <utility>
#include <variant>
#include <vector>
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/no_destructor.h"
#include "base/notimplemented.h"
#include "base/notreached.h"
#include "base/strings/string_number_conversions.h"
#include "base/time/time_delta_from_string.h"
#include "base/values.h"
#include "mapped_host_resolver.h"
#include "net/base/address_list.h"
#include "net/base/features.h"
#include "net/base/host_port_pair.h"
#include "net/base/net_errors.h"
#include "net/base/network_change_notifier.h"
#include "net/dns/context_host_resolver.h"
#include "net/dns/dns_client.h"
#include "net/dns/dns_util.h"
#include "net/dns/host_cache.h"
#include "net/dns/host_resolver_manager.h"
#include "net/dns/mapped_host_resolver.h"
#include "net/dns/public/host_resolver_results.h"
#include "net/dns/resolve_context.h"
#include "net/dns/stale_host_resolver.h"
#include "stale_host_resolver.h"
#include "url/scheme_host_port.h"
#if BUILDFLAG(IS_ANDROID)
#include "base/android/build_info.h"
#include "net/android/network_library.h"
#endif // BUILDFLAG(IS_ANDROID)
namespace net {
namespace {
// The experiment settings of features::kUseDnsHttpsSvcb. See the comments in
// net/base/features.h for more details.
const char kUseDnsHttpsSvcbEnable[] = "enable";
const char kUseDnsHttpsSvcbInsecureExtraTimeMax[] = "insecure_extra_time_max";
const char kUseDnsHttpsSvcbInsecureExtraTimePercent[] =
"insecure_extra_time_percent";
const char kUseDnsHttpsSvcbInsecureExtraTimeMin[] = "insecure_extra_time_min";
const char kUseDnsHttpsSvcbSecureExtraTimeMax[] = "secure_extra_time_max";
const char kUseDnsHttpsSvcbSecureExtraTimePercent[] =
"secure_extra_time_percent";
const char kUseDnsHttpsSvcbSecureExtraTimeMin[] = "secure_extra_time_min";
// An implementation of HostResolver::{ResolveHost,Probe}Request that always
// fails immediately.
class FailingRequestImpl : public HostResolver::ResolveHostRequest,
public HostResolver::ProbeRequest {
public:
explicit FailingRequestImpl(int error) : error_(error) {}
FailingRequestImpl(const FailingRequestImpl&) = delete;
FailingRequestImpl& operator=(const FailingRequestImpl&) = delete;
~FailingRequestImpl() override = default;
int Start(CompletionOnceCallback callback) override { return error_; }
int Start() override { return error_; }
AddressList* GetAddressResults() const override { return nullptr; }
std::vector<HostResolverEndpointResult>* GetEndpointResults() const override {
return nullptr;
}
const std::vector<std::string>* GetTextResults() const override {
return nullptr;
}
const std::vector<HostPortPair>* GetHostnameResults() const override {
return nullptr;
}
const std::set<std::string>* GetDnsAliasResults() const override {
return nullptr;
}
ResolveErrorInfo GetResolveErrorInfo() const override {
return ResolveErrorInfo(error_);
}
const std::optional<HostCache::EntryStaleness>& GetStaleInfo()
const override {
static const std::optional<HostCache::EntryStaleness> nullopt_result;
return nullopt_result;
}
private:
const int error_;
};
// Similar to FailingRequestImpl, but for ServiceEndpointRequest.
class FailingServiceEndpointRequestImpl
: public HostResolver::ServiceEndpointRequest {
public:
explicit FailingServiceEndpointRequestImpl(int error) : error_(error) {}
FailingServiceEndpointRequestImpl(const FailingServiceEndpointRequestImpl&) =
delete;
FailingServiceEndpointRequestImpl& operator=(
const FailingServiceEndpointRequestImpl&) = delete;
~FailingServiceEndpointRequestImpl() override = default;
int Start(Delegate* delegate) override { return error_; }
const std::vector<ServiceEndpoint>& GetEndpointResults() override {
static const base::NoDestructor<std::vector<ServiceEndpoint>> kEmptyResult;
return *kEmptyResult.get();
}
const std::set<std::string>& GetDnsAliasResults() override {
static const base::NoDestructor<std::set<std::string>> kEmptyResult;
return *kEmptyResult.get();
}
bool EndpointsCryptoReady() override { return false; }
ResolveErrorInfo GetResolveErrorInfo() override {
return ResolveErrorInfo(error_);
}
const HostCache::EntryStaleness* GetStaleInfo() const override {
return nullptr;
}
bool IsStaleWhileRefresing() const override { return false; }
void ChangeRequestPriority(RequestPriority priority) override {}
private:
const int error_;
};
bool EndpointResultIsNonProtocol(const HostResolverEndpointResult& result) {
return result.metadata.supported_protocol_alpns.empty();
}
void GetTimeDeltaFromDictString(const base::Value::Dict& args,
std::string_view key,
base::TimeDelta* out) {
const std::string* value_string = args.FindString(key);
if (!value_string)
return;
*out = base::TimeDeltaFromString(*value_string).value_or(*out);
}
} // namespace
HostResolver::Host::Host(std::variant<url::SchemeHostPort, HostPortPair> host)
: host_(std::move(host)) {
#if DCHECK_IS_ON()
if (std::holds_alternative<url::SchemeHostPort>(host_)) {
DCHECK(std::get<url::SchemeHostPort>(host_).IsValid());
} else {
DCHECK(std::holds_alternative<HostPortPair>(host_));
DCHECK(!std::get<HostPortPair>(host_).IsEmpty());
}
#endif // DCHECK_IS_ON()
}
HostResolver::Host::~Host() = default;
HostResolver::Host::Host(const Host&) = default;
HostResolver::Host& HostResolver::Host::operator=(const Host&) = default;
HostResolver::Host::Host(Host&&) = default;
HostResolver::Host& HostResolver::Host::operator=(Host&&) = default;
bool HostResolver::Host::HasScheme() const {
return std::holds_alternative<url::SchemeHostPort>(host_);
}
const std::string& HostResolver::Host::GetScheme() const {
DCHECK(std::holds_alternative<url::SchemeHostPort>(host_));
return std::get<url::SchemeHostPort>(host_).scheme();
}
std::string HostResolver::Host::GetHostname() const {
if (std::holds_alternative<url::SchemeHostPort>(host_)) {
return std::get<url::SchemeHostPort>(host_).host();
} else {
DCHECK(std::holds_alternative<HostPortPair>(host_));
return std::get<HostPortPair>(host_).HostForURL();
}
}
std::string_view HostResolver::Host::GetHostnameWithoutBrackets() const {
if (std::holds_alternative<url::SchemeHostPort>(host_)) {
std::string_view hostname = std::get<url::SchemeHostPort>(host_).host();
if (hostname.size() > 2 && hostname.front() == '[' &&
hostname.back() == ']') {
return hostname.substr(1, hostname.size() - 2);
} else {
return hostname;
}
} else {
DCHECK(std::holds_alternative<HostPortPair>(host_));
return std::get<HostPortPair>(host_).host();
}
}
uint16_t HostResolver::Host::GetPort() const {
if (std::holds_alternative<url::SchemeHostPort>(host_)) {
return std::get<url::SchemeHostPort>(host_).port();
} else {
DCHECK(std::holds_alternative<HostPortPair>(host_));
return std::get<HostPortPair>(host_).port();
}
}
std::string HostResolver::Host::ToString() const {
if (std::holds_alternative<url::SchemeHostPort>(host_)) {
return std::get<url::SchemeHostPort>(host_).Serialize();
} else {
DCHECK(std::holds_alternative<HostPortPair>(host_));
return std::get<HostPortPair>(host_).ToString();
}
}
const url::SchemeHostPort& HostResolver::Host::AsSchemeHostPort() const {
const url::SchemeHostPort* scheme_host_port =
std::get_if<url::SchemeHostPort>(&host_);
DCHECK(scheme_host_port);
return *scheme_host_port;
}
HostResolver::HttpsSvcbOptions::HttpsSvcbOptions() = default;
HostResolver::HttpsSvcbOptions::HttpsSvcbOptions(
const HttpsSvcbOptions& other) = default;
HostResolver::HttpsSvcbOptions::HttpsSvcbOptions(HttpsSvcbOptions&& other) =
default;
HostResolver::HttpsSvcbOptions::~HttpsSvcbOptions() = default;
// static
HostResolver::HttpsSvcbOptions HostResolver::HttpsSvcbOptions::FromDict(
const base::Value::Dict& dict) {
net::HostResolver::HttpsSvcbOptions options;
options.enable =
dict.FindBool(kUseDnsHttpsSvcbEnable).value_or(options.enable);
GetTimeDeltaFromDictString(dict, kUseDnsHttpsSvcbInsecureExtraTimeMax,
&options.insecure_extra_time_max);
options.insecure_extra_time_percent =
dict.FindInt(kUseDnsHttpsSvcbInsecureExtraTimePercent)
.value_or(options.insecure_extra_time_percent);
GetTimeDeltaFromDictString(dict, kUseDnsHttpsSvcbInsecureExtraTimeMin,
&options.insecure_extra_time_min);
GetTimeDeltaFromDictString(dict, kUseDnsHttpsSvcbSecureExtraTimeMax,
&options.secure_extra_time_max);
options.secure_extra_time_percent =
dict.FindInt(kUseDnsHttpsSvcbSecureExtraTimePercent)
.value_or(options.secure_extra_time_percent);
GetTimeDeltaFromDictString(dict, kUseDnsHttpsSvcbSecureExtraTimeMin,
&options.secure_extra_time_min);
return options;
}
// static
HostResolver::HttpsSvcbOptions HostResolver::HttpsSvcbOptions::FromFeatures() {
net::HostResolver::HttpsSvcbOptions options;
options.enable = base::FeatureList::IsEnabled(features::kUseDnsHttpsSvcb);
options.insecure_extra_time_max =
features::kUseDnsHttpsSvcbInsecureExtraTimeMax.Get();
options.insecure_extra_time_percent =
features::kUseDnsHttpsSvcbInsecureExtraTimePercent.Get();
options.insecure_extra_time_min =
features::kUseDnsHttpsSvcbInsecureExtraTimeMin.Get();
options.secure_extra_time_max =
features::kUseDnsHttpsSvcbSecureExtraTimeMax.Get();
options.secure_extra_time_percent =
features::kUseDnsHttpsSvcbSecureExtraTimePercent.Get();
options.secure_extra_time_min =
features::kUseDnsHttpsSvcbSecureExtraTimeMin.Get();
return options;
}
HostResolver::ManagerOptions::ManagerOptions() = default;
HostResolver::ManagerOptions::ManagerOptions(const ManagerOptions& other) =
default;
HostResolver::ManagerOptions::ManagerOptions(ManagerOptions&& other) = default;
HostResolver::ManagerOptions::~ManagerOptions() = default;
const std::vector<bool>*
HostResolver::ResolveHostRequest::GetExperimentalResultsForTesting() const {
NOTREACHED();
}
std::unique_ptr<HostResolver> HostResolver::Factory::CreateResolver(
HostResolverManager* manager,
std::string_view host_mapping_rules,
bool enable_caching,
bool enable_stale) {
return HostResolver::CreateResolver(manager, host_mapping_rules,
enable_caching, enable_stale);
}
std::unique_ptr<HostResolver> HostResolver::Factory::CreateStandaloneResolver(
NetLog* net_log,
const ManagerOptions& options,
std::string_view host_mapping_rules,
bool enable_caching,
bool enable_stale) {
return HostResolver::CreateStandaloneResolver(
net_log, options, host_mapping_rules, enable_caching, enable_stale);
}
HostResolver::ResolveHostParameters::ResolveHostParameters() = default;
HostResolver::ResolveHostParameters::ResolveHostParameters(
const ResolveHostParameters&) = default;
HostResolver::ResolveHostParameters&
HostResolver::ResolveHostParameters::operator=(const ResolveHostParameters&) =
default;
std::string HostResolver::ServiceEndpointRequest::DebugString() const {
return "";
}
HostResolver::~HostResolver() = default;
std::unique_ptr<HostResolver::ProbeRequest>
HostResolver::CreateDohProbeRequest() {
// Should be overridden in any HostResolver implementation where this method
// may be called.
NOTREACHED();
}
std::unique_ptr<HostResolver::MdnsListener> HostResolver::CreateMdnsListener(
const HostPortPair& host,
DnsQueryType query_type) {
// Should be overridden in any HostResolver implementation where this method
// may be called.
NOTREACHED();
}
HostCache* HostResolver::GetHostCache() {
return nullptr;
}
base::Value::Dict HostResolver::GetDnsConfigAsValue() const {
return base::Value::Dict();
}
void HostResolver::SetRequestContext(URLRequestContext* request_context) {
// Should be overridden in any HostResolver implementation where this method
// may be called.
NOTREACHED();
}
HostResolverManager* HostResolver::GetManagerForTesting() {
// Should be overridden in any HostResolver implementation where this method
// may be called.
NOTREACHED();
}
const URLRequestContext* HostResolver::GetContextForTesting() const {
// Should be overridden in any HostResolver implementation where this method
// may be called.
NOTREACHED();
}
handles::NetworkHandle HostResolver::GetTargetNetworkForTesting() const {
return handles::kInvalidNetworkHandle;
}
// static
std::unique_ptr<HostResolver> HostResolver::CreateResolver(
HostResolverManager* manager,
std::string_view host_mapping_rules,
bool enable_caching,
bool enable_stale) {
DCHECK(manager);
auto resolve_context = std::make_unique<ResolveContext>(
nullptr /* url_request_context */, enable_caching);
std::unique_ptr<ContextHostResolver> context_resolver =
std::make_unique<ContextHostResolver>(manager,
std::move(resolve_context));
std::unique_ptr<HostResolver> resolver;
// Wrap in StaleHostResolver if needed.
if (enable_stale) {
resolver = std::make_unique<StaleHostResolver>(
std::move(context_resolver), StaleHostResolver::StaleOptions());
} else {
resolver = std::move(context_resolver);
}
// Wrap in MappedHostResolver if needed.
if (!host_mapping_rules.empty()) {
auto remapped_resolver =
std::make_unique<MappedHostResolver>(std::move(resolver));
remapped_resolver->SetRulesFromString(host_mapping_rules);
resolver = std::move(remapped_resolver);
}
return resolver;
}
// static
std::unique_ptr<HostResolver> HostResolver::CreateStandaloneResolver(
NetLog* net_log,
std::optional<ManagerOptions> options,
std::string_view host_mapping_rules,
bool enable_caching,
bool enable_stale) {
std::unique_ptr<ContextHostResolver> context_resolver =
CreateStandaloneContextResolver(net_log, std::move(options),
enable_caching);
std::unique_ptr<HostResolver> resolver;
// Wrap in StaleHostResolver if needed.
if (enable_stale) {
resolver = std::make_unique<StaleHostResolver>(
std::move(context_resolver), StaleHostResolver::StaleOptions());
} else {
resolver = std::move(context_resolver);
}
// Wrap in MappedHostResolver if needed.
if (!host_mapping_rules.empty()) {
auto remapped_resolver =
std::make_unique<MappedHostResolver>(std::move(resolver));
remapped_resolver->SetRulesFromString(host_mapping_rules);
resolver = std::move(remapped_resolver);
}
return resolver;
}
// static
std::unique_ptr<ContextHostResolver>
HostResolver::CreateStandaloneContextResolver(
NetLog* net_log,
std::optional<ManagerOptions> options,
bool enable_caching) {
auto resolve_context = std::make_unique<ResolveContext>(
nullptr /* url_request_context */, enable_caching);
return std::make_unique<ContextHostResolver>(
std::make_unique<HostResolverManager>(
std::move(options).value_or(ManagerOptions()),
NetworkChangeNotifier::GetSystemDnsConfigNotifier(), net_log),
std::move(resolve_context));
}
// static
std::unique_ptr<HostResolver>
HostResolver::CreateStandaloneNetworkBoundResolver(
NetLog* net_log,
handles::NetworkHandle target_network,
std::optional<ManagerOptions> options,
std::string_view host_mapping_rules,
bool enable_caching) {
#if BUILDFLAG(IS_ANDROID)
// Note that the logic below uses Android APIs that don't work on a sandboxed
// process: This is not problematic because this function is used only by
// Cronet which doesn't enable sandboxing.
auto resolve_context = std::make_unique<ResolveContext>(
nullptr /*url_request_context */, enable_caching);
auto manager_options = std::move(options).value_or(ManagerOptions());
// Support the use of the built-in resolver when possible.
bool is_builtin_resolver_supported =
manager_options.insecure_dns_client_enabled &&
base::android::BuildInfo::GetInstance()->sdk_int() >=
base::android::SDK_VERSION_P;
if (is_builtin_resolver_supported) {
// Pre-existing DnsConfigOverrides is currently ignored, consider extending
// if a use case arises.
DCHECK(manager_options.dns_config_overrides == DnsConfigOverrides());
std::vector<IPEndPoint> dns_servers;
bool dns_over_tls_active;
std::string dns_over_tls_hostname;
std::vector<std::string> search_suffixes;
if (android::GetDnsServersForNetwork(&dns_servers, &dns_over_tls_active,
&dns_over_tls_hostname,
&search_suffixes, target_network)) {
DnsConfigOverrides dns_config_overrides =
DnsConfigOverrides::CreateOverridingEverythingWithDefaults();
dns_config_overrides.nameservers = dns_servers;
// Android APIs don't specify whether to use DoT or DoH. So, leave the
// decision to `DnsConfig::allow_dns_over_https_upgrade` default value.
dns_config_overrides.dns_over_tls_active = dns_over_tls_active;
dns_config_overrides.dns_over_tls_hostname = dns_over_tls_hostname;
dns_config_overrides.search = search_suffixes;
manager_options.dns_config_overrides = dns_config_overrides;
// Regardless of DoH vs DoT, the important contract to respect is not to
// perform insecure DNS lookups if `dns_over_tls_active` == true.
manager_options.additional_types_via_insecure_dns_enabled =
!dns_over_tls_active;
} else {
// Disable when android::GetDnsServersForNetwork fails.
is_builtin_resolver_supported = false;
}
}
manager_options.insecure_dns_client_enabled = is_builtin_resolver_supported;
return std::make_unique<ContextHostResolver>(
HostResolverManager::CreateNetworkBoundHostResolverManager(
manager_options, target_network, net_log),
std::move(resolve_context));
#else // !BUILDFLAG(IS_ANDROID)
NOTIMPLEMENTED();
return nullptr;
#endif // BUILDFLAG(IS_ANDROID)
}
// static
AddressFamily HostResolver::DnsQueryTypeSetToAddressFamily(
DnsQueryTypeSet dns_query_types) {
DCHECK(HasAddressType(dns_query_types));
// If the set of query types contains A and AAAA, defer the choice of address
// family. Otherwise, pick the corresponding address family.
if (dns_query_types.HasAll({DnsQueryType::A, DnsQueryType::AAAA}))
return ADDRESS_FAMILY_UNSPECIFIED;
if (dns_query_types.Has(DnsQueryType::AAAA))
return ADDRESS_FAMILY_IPV6;
DCHECK(dns_query_types.Has(DnsQueryType::A));
return ADDRESS_FAMILY_IPV4;
}
// static
HostResolverFlags HostResolver::ParametersToHostResolverFlags(
const ResolveHostParameters& parameters) {
HostResolverFlags flags = 0;
if (parameters.include_canonical_name)
flags |= HOST_RESOLVER_CANONNAME;
if (parameters.loopback_only)
flags |= HOST_RESOLVER_LOOPBACK_ONLY;
if (parameters.avoid_multicast_resolution)
flags |= HOST_RESOLVER_AVOID_MULTICAST;
return flags;
}
// static
int HostResolver::SquashErrorCode(int error) {
// TODO(crbug.com/40668952): Consider squashing ERR_INTERNET_DISCONNECTED.
if (error == OK || error == ERR_IO_PENDING ||
error == ERR_INTERNET_DISCONNECTED || error == ERR_NAME_NOT_RESOLVED ||
error == ERR_DNS_NAME_HTTPS_ONLY) {
return error;
} else {
return ERR_NAME_NOT_RESOLVED;
}
}
// static
AddressList HostResolver::EndpointResultToAddressList(
base::span<const HostResolverEndpointResult> endpoints,
const std::set<std::string>& aliases) {
AddressList list;
auto non_protocol_endpoint =
std::ranges::find_if(endpoints, &EndpointResultIsNonProtocol);
if (non_protocol_endpoint == endpoints.end())
return list;
list.endpoints() = non_protocol_endpoint->ip_endpoints;
std::vector<std::string> aliases_vector(aliases.begin(), aliases.end());
list.SetDnsAliases(std::move(aliases_vector));
return list;
}
// static
bool HostResolver::MayUseNAT64ForIPv4Literal(HostResolverFlags flags,
HostResolverSource source,
const IPAddress& ip_address) {
return !(flags & HOST_RESOLVER_DEFAULT_FAMILY_SET_DUE_TO_NO_IPV6) &&
ip_address.IsValid() && ip_address.IsIPv4() &&
(source != HostResolverSource::LOCAL_ONLY);
}
HostResolver::HostResolver() = default;
// static
std::unique_ptr<HostResolver::ResolveHostRequest>
HostResolver::CreateFailingRequest(int error) {
return std::make_unique<FailingRequestImpl>(error);
}
// static
std::unique_ptr<HostResolver::ProbeRequest>
HostResolver::CreateFailingProbeRequest(int error) {
return std::make_unique<FailingRequestImpl>(error);
}
// static
std::unique_ptr<HostResolver::ServiceEndpointRequest>
HostResolver::CreateFailingServiceEndpointRequest(int error) {
return std::make_unique<FailingServiceEndpointRequestImpl>(error);
}
} // namespace net
|