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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/network_hints/browser/simple_network_hints_handler_impl.h"
#include <memory>
#include <string>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/storage_partition.h"
#include "ipc/ipc_message_macros.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "net/base/address_list.h"
#include "net/base/net_errors.h"
#include "net/dns/public/host_resolver_results.h"
#include "net/dns/public/resolve_error_info.h"
#include "net/log/net_log_with_source.h"
#include "services/network/public/cpp/resolve_host_client_base.h"
#include "services/network/public/mojom/connection_change_observer_client.mojom.h"
#include "services/network/public/mojom/host_resolver.mojom.h"
#include "services/network/public/mojom/network_context.mojom.h"
#include "url/gurl.h"
namespace network_hints {
namespace {
// Preconnects can be received from the renderer before commit messages, so
// need to use the key from the pending navigation, and not the committed
// navigation, unlike other consumers. This does mean on navigating away from a
// site, preconnect is more likely to incorrectly use the
// NetworkAnonymizationKey of the previous commit.
net::NetworkAnonymizationKey GetPendingNetworkAnonymizationKey(
content::RenderFrameHost* render_frame_host) {
return render_frame_host->GetPendingIsolationInfoForSubresources()
.network_anonymization_key();
}
// This class contains a std::unique_ptr of itself, it is passed in through
// Start() method, and will be freed by the OnComplete() method when resolving
// has completed or mojo connection error has happened.
class DnsLookupRequest : public network::ResolveHostClientBase {
public:
DnsLookupRequest(int render_process_id,
int render_frame_id,
const url::SchemeHostPort& url)
: render_process_id_(render_process_id),
render_frame_id_(render_frame_id),
url_(url) {}
DnsLookupRequest(const DnsLookupRequest&) = delete;
DnsLookupRequest& operator=(const DnsLookupRequest&) = delete;
// Return underlying network resolver status.
// net::OK ==> Host was found synchronously.
// net:ERR_IO_PENDING ==> Network will callback later with result.
// anything else ==> Host was not found synchronously.
void Start(std::unique_ptr<DnsLookupRequest> request) {
request_ = std::move(request);
content::RenderFrameHost* render_frame_host =
content::RenderFrameHost::FromID(render_process_id_, render_frame_id_);
if (!render_frame_host) {
OnComplete(net::ERR_NAME_NOT_RESOLVED,
net::ResolveErrorInfo(net::ERR_FAILED),
/*resolved_addresses=*/std::nullopt,
/*endpoint_results_with_metadata=*/std::nullopt);
return;
}
DCHECK(!receiver_.is_bound());
network::mojom::ResolveHostParametersPtr resolve_host_parameters =
network::mojom::ResolveHostParameters::New();
// Lets the host resolver know it can be de-prioritized.
resolve_host_parameters->initial_priority = net::RequestPriority::IDLE;
// Make a note that this is a speculative resolve request. This allows
// separating it from real navigations in the observer's callback.
resolve_host_parameters->is_speculative = true;
// TODO(crbug.com/40235854): Consider passing a SchemeHostPort to trigger
// HTTPS DNS resource record query.
render_frame_host->GetProcess()
->GetStoragePartition()
->GetNetworkContext()
->ResolveHost(network::mojom::HostResolverHost::NewSchemeHostPort(url_),
GetPendingNetworkAnonymizationKey(render_frame_host),
std::move(resolve_host_parameters),
receiver_.BindNewPipeAndPassRemote());
receiver_.set_disconnect_handler(base::BindOnce(
&DnsLookupRequest::OnComplete, base::Unretained(this),
net::ERR_NAME_NOT_RESOLVED, net::ResolveErrorInfo(net::ERR_FAILED),
/*resolved_addresses=*/std::nullopt,
/*endpoint_results_with_metadata=*/std::nullopt));
}
private:
// network::mojom::ResolveHostClient:
void OnComplete(int result,
const net::ResolveErrorInfo& resolve_error_info,
const std::optional<net::AddressList>& resolved_addresses,
const std::optional<net::HostResolverEndpointResults>&
endpoint_results_with_metadata) override {
VLOG(2) << __FUNCTION__ << ": " << url_.Serialize()
<< ", result=" << resolve_error_info.error;
request_.reset();
}
mojo::Receiver<network::mojom::ResolveHostClient> receiver_{this};
const int render_process_id_;
const int render_frame_id_;
const url::SchemeHostPort url_;
std::unique_ptr<DnsLookupRequest> request_;
};
} // namespace
SimpleNetworkHintsHandlerImpl::SimpleNetworkHintsHandlerImpl(
int render_process_id,
int render_frame_id)
: render_process_id_(render_process_id),
render_frame_id_(render_frame_id) {}
SimpleNetworkHintsHandlerImpl::~SimpleNetworkHintsHandlerImpl() = default;
// static
void SimpleNetworkHintsHandlerImpl::Create(
content::RenderFrameHost* frame_host,
mojo::PendingReceiver<mojom::NetworkHintsHandler> receiver) {
int render_process_id = frame_host->GetProcess()->GetDeprecatedID();
int render_frame_id = frame_host->GetRoutingID();
mojo::MakeSelfOwnedReceiver(
base::WrapUnique(new SimpleNetworkHintsHandlerImpl(render_process_id,
render_frame_id)),
std::move(receiver));
}
void SimpleNetworkHintsHandlerImpl::PrefetchDNS(
const std::vector<url::SchemeHostPort>& urls) {
for (const url::SchemeHostPort& url : urls) {
std::unique_ptr<DnsLookupRequest> request =
std::make_unique<DnsLookupRequest>(render_process_id_, render_frame_id_,
url);
DnsLookupRequest* request_ptr = request.get();
request_ptr->Start(std::move(request));
}
}
void SimpleNetworkHintsHandlerImpl::Preconnect(const url::SchemeHostPort& url,
bool allow_credentials) {
if (url.scheme() != url::kHttpScheme && url.scheme() != url::kHttpsScheme) {
return;
}
auto* render_frame_host =
content::RenderFrameHost::FromID(render_process_id_, render_frame_id_);
if (!render_frame_host)
return;
net::NetworkAnonymizationKey network_anonymization_key =
render_frame_host->GetPendingIsolationInfoForSubresources()
.network_anonymization_key();
render_frame_host->GetStoragePartition()
->GetNetworkContext()
->PreconnectSockets(
/*num_streams=*/1, url.GetURL(),
allow_credentials ? network::mojom::CredentialsMode::kInclude
: network::mojom::CredentialsMode::kOmit,
network_anonymization_key, net::MutableNetworkTrafficAnnotationTag(),
/*keepalive_config=*/std::nullopt, mojo::NullRemote());
}
} // namespace network_hints
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