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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/net/network_diagnostics/video_conferencing_routine.h"
#include <optional>
#include <string>
#include <utility>
#include "base/logging.h"
#include "base/time/time.h"
#include "chrome/browser/ash/net/network_diagnostics/network_diagnostics_util.h"
#include "chrome/browser/ash/net/network_diagnostics/udp_prober.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/storage_partition.h"
#include "net/base/net_errors.h"
#include "services/network/public/mojom/network_context.mojom.h"
namespace ash {
namespace network_diagnostics {
namespace {
namespace mojom = ::chromeos::network_diagnostics::mojom;
const char kDefaultStunServer[] = "stun.l.google.com";
} // namespace
// TODO(crbug/1227877): Move support details to the UI.
const char kSupportDetails[] = "https://support.google.com/a/answer/1279090";
const base::TimeDelta kTimeoutAfterHostResolution = base::Seconds(10);
VideoConferencingRoutine::VideoConferencingRoutine(
mojom::RoutineCallSource source)
: NetworkDiagnosticsRoutine(source),
stun_server_hostname_(kDefaultStunServer),
udp_prober_getter_callback_(base::BindRepeating(
&VideoConferencingRoutine::CreateAndExecuteUdpProber)),
tls_prober_getter_callback_(base::BindRepeating(
&VideoConferencingRoutine::CreateAndExecuteTlsProber)),
udp_ports_(util::GetUdpPortsForGoogleStunServer()),
tcp_ports_(util::GetTcpPortsForGoogleStunServer()),
media_hostnames_(util::GetDefaultMediaUrls()) {}
VideoConferencingRoutine::VideoConferencingRoutine(
mojom::RoutineCallSource source,
const std::string& stun_server_hostname)
: NetworkDiagnosticsRoutine(source),
stun_server_hostname_(stun_server_hostname),
udp_prober_getter_callback_(base::BindRepeating(
&VideoConferencingRoutine::CreateAndExecuteUdpProber)),
tls_prober_getter_callback_(base::BindRepeating(
&VideoConferencingRoutine::CreateAndExecuteTlsProber)),
udp_ports_(util::GetUdpPortsForCustomStunServer()),
tcp_ports_(util::GetTcpPortsForCustomStunServer()),
media_hostnames_(util::GetDefaultMediaUrls()) {}
VideoConferencingRoutine::~VideoConferencingRoutine() = default;
mojom::RoutineType VideoConferencingRoutine::Type() {
return mojom::RoutineType::kVideoConferencing;
}
void VideoConferencingRoutine::Run() {
ProbeStunServerOverUdp();
}
void VideoConferencingRoutine::AnalyzeResultsAndExecuteCallback() {
std::optional<std::string> support_details = kSupportDetails;
set_verdict(mojom::RoutineVerdict::kProblem);
if (!open_udp_port_found_) {
problems_.push_back(mojom::VideoConferencingProblem::kUdpFailure);
}
if (!open_tcp_port_found_) {
problems_.push_back(mojom::VideoConferencingProblem::kTcpFailure);
}
if (!media_hostnames_reachable_) {
problems_.push_back(mojom::VideoConferencingProblem::kMediaFailure);
}
if (problems_.empty()) {
set_verdict(mojom::RoutineVerdict::kNoProblem);
support_details = std::nullopt;
}
set_problems(mojom::RoutineProblems::NewVideoConferencingProblems(problems_));
ExecuteCallback();
}
void VideoConferencingRoutine::ProbeStunServerOverUdp() {
if (udp_ports_.empty()) {
ProbeStunServerOverTcp();
return;
}
int port = udp_ports_.back();
udp_ports_.pop_back();
AttemptUdpProbe(net::HostPortPair(stun_server_hostname_, port));
}
void VideoConferencingRoutine::ProbeStunServerOverTcp() {
if (tcp_ports_.empty()) {
ProbeMediaHostnames();
return;
}
int port = tcp_ports_.back();
tcp_ports_.pop_back();
AttemptTcpProbe(net::HostPortPair(stun_server_hostname_, port));
}
void VideoConferencingRoutine::ProbeMediaHostnames() {
if (media_hostnames_.empty()) {
AnalyzeResultsAndExecuteCallback();
return;
}
auto host_pair = net::HostPortPair::FromURL(media_hostnames_.back());
media_hostnames_.pop_back();
AttemptTlsProbe(host_pair);
}
network::mojom::NetworkContext* VideoConferencingRoutine::GetNetworkContext() {
Profile* profile = util::GetUserProfile();
DCHECK(profile);
return profile->GetDefaultStoragePartition()->GetNetworkContext();
}
std::unique_ptr<UdpProber> VideoConferencingRoutine::CreateAndExecuteUdpProber(
network::NetworkContextGetter network_context_getter,
net::HostPortPair host_port_pair,
base::span<const uint8_t> data,
net::NetworkTrafficAnnotationTag tag,
base::TimeDelta timeout_after_host_resolution,
UdpProber::UdpProbeCompleteCallback callback) {
return UdpProber::Start(std::move(network_context_getter), host_port_pair,
std::move(data), tag, timeout_after_host_resolution,
std::move(callback));
}
std::unique_ptr<TlsProber> VideoConferencingRoutine::CreateAndExecuteTlsProber(
network::NetworkContextGetter network_context_getter,
net::HostPortPair host_port_pair,
bool negotiate_tls,
TlsProber::TlsProbeCompleteCallback callback) {
return std::make_unique<TlsProber>(std::move(network_context_getter),
host_port_pair, negotiate_tls,
std::move(callback));
}
void VideoConferencingRoutine::AttemptUdpProbe(
net::HostPortPair host_port_pair) {
// Store the instance of UdpProber.
udp_prober_ = udp_prober_getter_callback_.Run(
base::BindRepeating(&VideoConferencingRoutine::GetNetworkContext),
host_port_pair, util::GetStunHeader(),
util::GetStunNetworkAnnotationTag(), kTimeoutAfterHostResolution,
base::BindOnce(&VideoConferencingRoutine::OnUdpProbeComplete,
weak_ptr()));
}
void VideoConferencingRoutine::AttemptTcpProbe(
net::HostPortPair host_port_pair) {
tls_prober_ = tls_prober_getter_callback_.Run(
base::BindRepeating(&VideoConferencingRoutine::GetNetworkContext),
host_port_pair,
/*negotiate_tls=*/false,
base::BindOnce(&VideoConferencingRoutine::OnTcpProbeComplete,
weak_ptr()));
}
void VideoConferencingRoutine::AttemptTlsProbe(
net::HostPortPair host_port_pair) {
// Store the instance of TlsProber.
tls_prober_ = tls_prober_getter_callback_.Run(
base::BindRepeating(&VideoConferencingRoutine::GetNetworkContext),
host_port_pair,
/*negotiate_tls=*/true,
base::BindOnce(&VideoConferencingRoutine::OnTlsProbeComplete,
weak_ptr()));
}
void VideoConferencingRoutine::OnUdpProbeComplete(
int result,
UdpProber::ProbeExitEnum probe_exit_enum) {
if (result == net::OK) {
open_udp_port_found_ = true;
// Only one open UDP port needs to be detected.
ProbeStunServerOverTcp();
return;
}
ProbeStunServerOverUdp();
}
void VideoConferencingRoutine::OnTcpProbeComplete(
int result,
TlsProber::ProbeExitEnum probe_exit_enum) {
if (result == net::OK) {
open_tcp_port_found_ = true;
// Only one open TCP port needs to be detected.
ProbeMediaHostnames();
return;
}
ProbeStunServerOverTcp();
}
void VideoConferencingRoutine::OnTlsProbeComplete(
int result,
TlsProber::ProbeExitEnum probe_exit_enum) {
if (result != net::OK) {
media_hostnames_reachable_ = false;
// All media hostnames must be reachable.
AnalyzeResultsAndExecuteCallback();
return;
}
ProbeMediaHostnames();
}
} // namespace network_diagnostics
} // namespace ash
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