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Update dns_transaction.cc

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Alexander David Frick 2022-02-17 11:43:10 -06:00 committed by GitHub
parent 18cbecc6ac
commit 2a8de594e1
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1 changed files with 23 additions and 16 deletions
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39
net/dns/dns_transaction.cc
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@ -1,4 +1,4 @@
// Copyright (c) 2022 The Chromium Authors. All rights reserved.
// Copyright (c) 2022 The Chromium Authors and Alex313031. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
@ -451,12 +451,14 @@ class DnsHTTPAttempt : public DnsAttempt, public URLRequest::Delegate {
int Start(CompletionOnceCallback callback) override {
callback_ = std::move(callback);
request_->Start();
// Start the request asynchronously to avoid reentrancy in
// the network stack.
base::SequencedTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(&DnsHTTPAttempt::StartAsync,
weak_factory_.GetWeakPtr()));
return ERR_IO_PENDING;
}
void Cancel() { request_.reset(); }
const DnsQuery* GetQuery() const override { return query_.get(); }
const DnsResponse* GetResponse() const override {
const DnsResponse* resp = response_.get();
@ -561,6 +563,11 @@ class DnsHTTPAttempt : public DnsAttempt, public URLRequest::Delegate {
bool IsPending() const override { return !callback_.is_null(); }
private:
void StartAsync() {
DCHECK(request_);
request_->Start();
}
void ResponseCompleted(int net_error) {
request_.reset();
std::move(callback_).Run(CompleteResponse(net_error));
@ -618,14 +625,14 @@ void ConstructDnsHTTPAttempt(DnsSession* session,
query = std::make_unique<DnsQuery>(*attempts->at(0)->GetQuery());
}
DCHECK_LT(doh_server_index, session->config().dns_over_https_servers.size());
const DnsOverHttpsServerConfig& doh_config =
session->config().dns_over_https_servers[doh_server_index];
DCHECK_LT(doh_server_index, session->config().doh_config.servers().size());
const DnsOverHttpsServerConfig& doh_server =
session->config().doh_config.servers()[doh_server_index];
GURL gurl_without_parameters(
GetURLFromTemplateWithoutParameters(doh_config.server_template()));
GetURLFromTemplateWithoutParameters(doh_server.server_template()));
attempts->push_back(std::make_unique<DnsHTTPAttempt>(
doh_server_index, std::move(query), doh_config.server_template(),
gurl_without_parameters, doh_config.use_post(), url_request_context,
doh_server_index, std::move(query), doh_server.server_template(),
gurl_without_parameters, doh_server.use_post(), url_request_context,
isolation_info, request_priority));
}
@ -913,12 +920,12 @@ class DnsOverHttpsProbeRunner : public DnsProbeRunner {
base::WeakPtr<ResolveContext> context)
: session_(session), context_(context) {
DCHECK(session_);
DCHECK(!session_->config().dns_over_https_servers.empty());
DCHECK(!session_->config().doh_config.servers().empty());
DCHECK(context_);
DNSDomainFromDot(kDoHProbeHostname, &formatted_probe_hostname_);
for (size_t i = 0; i < session_->config().dns_over_https_servers.size();
for (size_t i = 0; i < session_->config().doh_config.servers().size();
i++) {
probe_stats_list_.push_back(nullptr);
}
@ -930,9 +937,9 @@ class DnsOverHttpsProbeRunner : public DnsProbeRunner {
DCHECK(session_);
DCHECK(context_);
const auto& config = session_->config().doh_config;
// Start probe sequences for any servers where it is not currently running.
for (size_t i = 0; i < session_->config().dns_over_https_servers.size();
i++) {
for (size_t i = 0; i < config.servers().size(); i++) {
if (!probe_stats_list_[i]) {
probe_stats_list_[i] = std::make_unique<ProbeStats>();
ContinueProbe(i, probe_stats_list_[i]->weak_factory.GetWeakPtr(),
@ -1254,7 +1261,7 @@ class DnsTransactionImpl : public DnsTransaction,
if (secure_ && result.attempt) {
size_t server_index = result.attempt->server_index();
doh_provider_id = GetDohProviderIdForHistogramFromServerConfig(
session_->config().dns_over_https_servers[server_index]);
session_->config().doh_config.servers()[server_index]);
}
std::move(callback_).Run(this, result.rv, response, doh_provider_id);
@ -1270,7 +1277,7 @@ class DnsTransactionImpl : public DnsTransaction,
DnsConfig config = session_->config();
if (secure_) {
DCHECK_GT(config.dns_over_https_servers.size(), 0u);
DCHECK(!config.doh_config.servers().empty());
RecordAttemptUma(DnsAttemptType::kHttp);
return MakeHTTPAttempt();
}