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content / browser / webtransport / web_transport_connector_impl.cc [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/webtransport/web_transport_connector_impl.h"
#include "base/strings/stringprintf.h"
#include "content/browser/devtools/devtools_instrumentation.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/webtransport/web_transport_throttle_context.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/common/content_client.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
namespace content {
namespace {
using network::mojom::WebTransportHandshakeClient;
const void* const kWebTransportThrottleContextKey =
"WebTransportThrottleContextKey";
base::WeakPtr<WebTransportThrottleContext> GetThrottleContextFromUserData(
base::SupportsUserData* context_holder) {
auto* throttle_context = static_cast<WebTransportThrottleContext*>(
context_holder->GetUserData(kWebTransportThrottleContextKey));
if (!throttle_context) {
auto new_throttle_context = std::make_unique<WebTransportThrottleContext>();
throttle_context = new_throttle_context.get();
context_holder->SetUserData(kWebTransportThrottleContextKey,
std::move(new_throttle_context));
}
return throttle_context->GetWeakPtr();
}
base::WeakPtr<WebTransportThrottleContext> GetThrottleContext(
int process_id,
base::WeakPtr<RenderFrameHostImpl> frame) {
if (frame) {
// This is either a frame or a DedicatedWorker. Use per-page throttling.
auto& page = frame->GetPage();
return GetThrottleContextFromUserData(&page);
} else {
// This is either a SharedWorker or a ServiceWorker. Use per-profile
// throttling.
RenderProcessHost* process = RenderProcessHost::FromID(process_id);
if (!process)
return nullptr;
auto* browser_context = process->GetBrowserContext();
return GetThrottleContextFromUserData(browser_context);
}
}
class InterceptingHandshakeClient final : public WebTransportHandshakeClient {
public:
InterceptingHandshakeClient(
base::WeakPtr<RenderFrameHostImpl> frame,
const GURL& url,
mojo::PendingRemote<WebTransportHandshakeClient> remote,
std::unique_ptr<WebTransportThrottleContext::Tracker> tracker)
: frame_(std::move(frame)),
url_(url),
remote_(std::move(remote)),
tracker_(std::move(tracker)) {}
~InterceptingHandshakeClient() override = default;
// WebTransportHandshakeClient implementation:
void OnConnectionEstablished(
mojo::PendingRemote<network::mojom::WebTransport> transport,
mojo::PendingReceiver<network::mojom::WebTransportClient> client,
const scoped_refptr<net::HttpResponseHeaders>& response_headers,
network::mojom::WebTransportStatsPtr initial_stats) override {
if (tracker_) {
tracker_->OnHandshakeEstablished();
}
// We don't need to pass headers to the renderer here.
remote_->OnConnectionEstablished(
std::move(transport), std::move(client),
base::MakeRefCounted<net::HttpResponseHeaders>(
/*raw_headers=*/""),
std::move(initial_stats));
}
void OnHandshakeFailed(
const std::optional<net::WebTransportError>& error) override {
if (tracker_) {
tracker_->OnHandshakeFailed();
}
// Here we pass null because it is dangerous to pass the error details
// to the initiator renderer.
remote_->OnHandshakeFailed(std::nullopt);
if (RenderFrameHostImpl* frame = frame_.get()) {
devtools_instrumentation::OnWebTransportHandshakeFailed(frame, url_,
error);
}
}
private:
const base::WeakPtr<RenderFrameHostImpl> frame_;
const GURL url_;
mojo::Remote<WebTransportHandshakeClient> remote_;
// Target for notifying the throttle of handshake result. nullptr if the
// result has already been signalled.
const std::unique_ptr<WebTransportThrottleContext::Tracker> tracker_;
};
} // namespace
WebTransportConnectorImpl::WebTransportConnectorImpl(
int process_id,
base::WeakPtr<RenderFrameHostImpl> frame,
const url::Origin& origin,
const net::NetworkAnonymizationKey& network_anonymization_key)
: process_id_(process_id),
frame_(std::move(frame)),
origin_(origin),
network_anonymization_key_(network_anonymization_key),
throttle_context_(GetThrottleContext(process_id_, frame_)) {}
WebTransportConnectorImpl::~WebTransportConnectorImpl() = default;
void WebTransportConnectorImpl::Connect(
const GURL& url,
std::vector<network::mojom::WebTransportCertificateFingerprintPtr>
fingerprints,
mojo::PendingRemote<network::mojom::WebTransportHandshakeClient>
handshake_client) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
RenderProcessHost* process = RenderProcessHost::FromID(process_id_);
if (!process) {
return;
}
if (throttle_context_) {
auto result = throttle_context_->PerformThrottle(base::BindOnce(
&WebTransportConnectorImpl::OnThrottleDone, weak_factory_.GetWeakPtr(),
url, std::move(fingerprints), std::move(handshake_client)));
if (result ==
WebTransportThrottleContext::ThrottleResult::kTooManyPendingSessions) {
if (frame_) {
frame_->AddMessageToConsole(
blink::mojom::ConsoleMessageLevel::kWarning,
base::StringPrintf(
"WebTransport session establishment failed. "
"Too many pending WebTransport sessions (%d)",
WebTransportThrottleContext::kMaxPendingSessions));
}
// The handshake will be considered failed by the render process since
// `handshake_client` was destroyed when the callback was discarded.
}
} else {
OnThrottleDone(url, std::move(fingerprints), std::move(handshake_client),
/*tracker=*/nullptr);
}
}
void WebTransportConnectorImpl::OnThrottleDone(
const GURL& url,
std::vector<network::mojom::WebTransportCertificateFingerprintPtr>
fingerprints,
mojo::PendingRemote<network::mojom::WebTransportHandshakeClient>
handshake_client,
std::unique_ptr<WebTransportThrottleContext::Tracker> tracker) {
RenderProcessHost* process = RenderProcessHost::FromID(process_id_);
if (!process) {
return;
}
mojo::PendingRemote<WebTransportHandshakeClient> handshake_client_to_pass;
auto client_receiver =
handshake_client_to_pass.InitWithNewPipeAndPassReceiver();
// TODO(yhirano): Stop using MakeSelfOwnedReceiver here, because the
// WebTransport implementation in the network service won't notice that
// the WebTransportHandshakeClient is going away.
mojo::MakeSelfOwnedReceiver(
std::make_unique<InterceptingHandshakeClient>(
frame_, url, std::move(handshake_client), std::move(tracker)),
std::move(client_receiver));
GetContentClient()->browser()->WillCreateWebTransport(
process_id_, frame_ ? frame_->GetRoutingID() : MSG_ROUTING_NONE, url,
origin_, std::move(handshake_client_to_pass),
base::BindOnce(
&WebTransportConnectorImpl::OnWillCreateWebTransportCompleted,
weak_factory_.GetWeakPtr(), url, std::move(fingerprints)));
}
void WebTransportConnectorImpl::OnWillCreateWebTransportCompleted(
const GURL& url,
std::vector<network::mojom::WebTransportCertificateFingerprintPtr>
fingerprints,
mojo::PendingRemote<network::mojom::WebTransportHandshakeClient>
handshake_client,
std::optional<network::mojom::WebTransportErrorPtr> error) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
RenderProcessHost* process = RenderProcessHost::FromID(process_id_);
if (!process) {
return;
}
if (error) {
mojo::Remote<WebTransportHandshakeClient> remote(
std::move(handshake_client));
remote->OnHandshakeFailed(net::WebTransportError(
error.value()->net_error,
static_cast<quic::QuicErrorCode>(error.value()->quic_error),
error.value()->details, error.value()->safe_to_report_details));
return;
}
process->GetStoragePartition()->GetNetworkContext()->CreateWebTransport(
url, origin_, network_anonymization_key_, std::move(fingerprints),
std::move(handshake_client));
}
} // namespace content