blob: a4039fb17286cfff0a2bf5ff5b7412bc865c722c [file] [log] [blame]
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/it2me/it2me_host.h"
#include <cstdint>
#include <memory>
#include <string>
#include <utility>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/strings/string_util.h"
#include "base/threading/platform_thread.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "build/chromeos_buildflags.h"
#include "components/policy/policy_constants.h"
#include "net/url_request/url_request_context_getter.h"
#include "remoting/base/auto_thread.h"
#include "remoting/base/logging.h"
#include "remoting/base/oauth_token_getter.h"
#include "remoting/base/rsa_key_pair.h"
#include "remoting/base/service_urls.h"
#include "remoting/host/chromoting_host.h"
#include "remoting/host/chromoting_host_context.h"
#include "remoting/host/ftl_signaling_connector.h"
#include "remoting/host/host_event_logger.h"
#include "remoting/host/host_secret.h"
#include "remoting/host/host_status_logger.h"
#include "remoting/host/it2me/it2me_confirmation_dialog.h"
#include "remoting/host/it2me/it2me_helpers.h"
#include "remoting/host/it2me_desktop_environment.h"
#include "remoting/protocol/auth_util.h"
#include "remoting/protocol/chromium_port_allocator_factory.h"
#include "remoting/protocol/ice_transport.h"
#include "remoting/protocol/it2me_host_authenticator_factory.h"
#include "remoting/protocol/jingle_session_manager.h"
#include "remoting/protocol/network_settings.h"
#include "remoting/protocol/transport_context.h"
#include "remoting/protocol/validating_authenticator.h"
#include "remoting/signaling/log_to_server.h"
#include "remoting/signaling/signaling_id_util.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
namespace remoting {
using protocol::ErrorCode;
namespace {
// This is used for tagging system event logs.
const char kApplicationName[] = "chromoting";
const int kMaxLoginAttempts = 5;
using protocol::ValidatingAuthenticator;
typedef ValidatingAuthenticator::Result ValidationResult;
typedef ValidatingAuthenticator::ValidationCallback ValidationCallback;
typedef ValidatingAuthenticator::ResultCallback ValidationResultCallback;
// The amount of time to wait before destroying the signal strategy. This delay
// ensures there is time for the session-terminate message to be sent.
constexpr base::TimeDelta kDestroySignalingDelay = base::Seconds(2);
} // namespace
It2MeHost::DeferredConnectContext::DeferredConnectContext() = default;
It2MeHost::DeferredConnectContext::~DeferredConnectContext() = default;
It2MeHost::It2MeHost() = default;
It2MeHost::~It2MeHost() {
// Check that resources that need to be torn down on the UI thread are gone.
DCHECK(!desktop_environment_factory_.get());
}
void It2MeHost::set_enable_dialogs(bool enable) {
#if BUILDFLAG(IS_CHROMEOS_ASH) || !defined(NDEBUG)
enable_dialogs_ = enable;
#else
NOTREACHED() << "It2MeHost::set_enable_dialogs is only supported on ChromeOS";
#endif
}
void It2MeHost::set_enable_notifications(bool enable) {
#if BUILDFLAG(IS_CHROMEOS_ASH) || !defined(NDEBUG)
enable_notifications_ = enable;
#else
NOTREACHED() << "It2MeHost::set_enable_notifications is only supported on "
<< "ChromeOS";
#endif
}
void It2MeHost::set_terminate_upon_input(bool terminate_upon_input) {
#if BUILDFLAG(IS_CHROMEOS_ASH) || !defined(NDEBUG)
terminate_upon_input_ = terminate_upon_input;
#else
NOTREACHED()
<< "It2MeHost::set_terminate_upon_input is only supported on ChromeOS";
#endif
}
void It2MeHost::set_is_enterprise_session(bool is_enterprise_session) {
#if BUILDFLAG(IS_CHROMEOS_ASH) || !defined(NDEBUG)
is_enterprise_session_ = is_enterprise_session;
#else
NOTREACHED()
<< "It2MeHost::set_is_enterprise_session is only supported on ChromeOS";
#endif
}
void It2MeHost::Connect(
std::unique_ptr<ChromotingHostContext> host_context,
std::unique_ptr<base::DictionaryValue> policies,
std::unique_ptr<It2MeConfirmationDialogFactory> dialog_factory,
base::WeakPtr<It2MeHost::Observer> observer,
CreateDeferredConnectContext create_context,
const std::string& username,
const protocol::IceConfig& ice_config) {
DCHECK(host_context->ui_task_runner()->BelongsToCurrentThread());
host_context_ = std::move(host_context);
observer_ = std::move(observer);
confirmation_dialog_factory_ = std::move(dialog_factory);
OnPolicyUpdate(std::move(policies));
desktop_environment_factory_ =
std::make_unique<It2MeDesktopEnvironmentFactory>(
host_context_->network_task_runner(),
host_context_->video_capture_task_runner(),
host_context_->input_task_runner(), host_context_->ui_task_runner());
// Switch to the network thread to start the actual connection.
host_context_->network_task_runner()->PostTask(
FROM_HERE,
base::BindOnce(&It2MeHost::ConnectOnNetworkThread, this, username,
ice_config, std::move(create_context)));
}
void It2MeHost::Disconnect() {
DCHECK(host_context_->ui_task_runner()->BelongsToCurrentThread());
host_context_->network_task_runner()->PostTask(
FROM_HERE, base::BindOnce(&It2MeHost::DisconnectOnNetworkThread, this,
protocol::ErrorCode::OK));
}
void It2MeHost::ConnectOnNetworkThread(
const std::string& username,
const protocol::IceConfig& ice_config,
CreateDeferredConnectContext create_context) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
DCHECK_EQ(It2MeHostState::kDisconnected, state_);
if (!remote_support_connections_allowed_) {
SetState(It2MeHostState::kError, ErrorCode::DISALLOWED_BY_POLICY);
return;
}
SetState(It2MeHostState::kStarting, ErrorCode::OK);
auto connection_context = std::move(create_context).Run(host_context_.get());
log_to_server_ = std::move(connection_context->log_to_server);
signal_strategy_ = std::move(connection_context->signal_strategy);
oauth_token_getter_ = std::move(connection_context->oauth_token_getter);
DCHECK(log_to_server_);
DCHECK(signal_strategy_);
if (connection_context->use_ftl_signaling) {
// If the host owns the signaling channel then we want to make sure that it
// will reconnect that channel if a transient network error occurs.
// FtlSignalingConnector takes a callback which will indicate whether an
// auth error has occurred (e.g. token expired). For our purposes, there
// isn't anything we need to do in this case since a new token will be
// generated for the next connection.
ftl_signaling_connector_ = std::make_unique<FtlSignalingConnector>(
signal_strategy_.get(), base::DoNothing());
ftl_signaling_connector_->Start();
}
// Check the host domain policy.
if (!required_host_domain_list_.empty()) {
bool matched = false;
for (const auto& domain : required_host_domain_list_) {
if (base::EndsWith(username, std::string("@") + domain,
base::CompareCase::INSENSITIVE_ASCII)) {
matched = true;
break;
}
}
if (!matched) {
SetState(It2MeHostState::kInvalidDomainError, ErrorCode::OK);
return;
}
}
// Generate a key pair for the Host to use.
// TODO(wez): Move this to the worker thread.
host_key_pair_ = RsaKeyPair::Generate();
// Request registration of the host for support.
register_request_ = std::move(connection_context->register_request);
register_request_->StartRequest(
signal_strategy_.get(), host_key_pair_,
base::BindOnce(&It2MeHost::OnReceivedSupportID, base::Unretained(this)));
HOST_LOG << "NAT traversal enabled: " << nat_traversal_enabled_;
HOST_LOG << "Relay connections allowed: " << relay_connections_allowed_;
uint32_t network_flags = protocol::NetworkSettings::NAT_TRAVERSAL_DISABLED;
if (nat_traversal_enabled_) {
network_flags = protocol::NetworkSettings::NAT_TRAVERSAL_STUN |
protocol::NetworkSettings::NAT_TRAVERSAL_OUTGOING;
if (relay_connections_allowed_) {
network_flags |= protocol::NetworkSettings::NAT_TRAVERSAL_RELAY;
}
}
protocol::NetworkSettings network_settings(network_flags);
if (!udp_port_range_.is_null()) {
network_settings.port_range = udp_port_range_;
} else if (!nat_traversal_enabled_) {
// For legacy reasons we have to restrict the port range to a set of default
// values when nat traversal is disabled, even if the port range was not
// set in policy.
network_settings.port_range.min_port =
protocol::NetworkSettings::kDefaultMinPort;
network_settings.port_range.max_port =
protocol::NetworkSettings::kDefaultMaxPort;
}
scoped_refptr<protocol::TransportContext> transport_context =
new protocol::TransportContext(
std::make_unique<protocol::ChromiumPortAllocatorFactory>(),
host_context_->url_loader_factory(), oauth_token_getter_.get(),
network_settings, protocol::TransportRole::SERVER);
if (!ice_config.is_null()) {
transport_context->set_turn_ice_config(ice_config);
}
std::unique_ptr<protocol::SessionManager> session_manager(
new protocol::JingleSessionManager(signal_strategy_.get()));
std::unique_ptr<protocol::CandidateSessionConfig> protocol_config =
protocol::CandidateSessionConfig::CreateDefault();
// Disable audio by default.
// TODO(sergeyu): Add UI to enable it.
protocol_config->DisableAudioChannel();
protocol_config->set_webrtc_supported(true);
session_manager->set_protocol_config(std::move(protocol_config));
// Set up the desktop environment options.
DesktopEnvironmentOptions options(DesktopEnvironmentOptions::CreateDefault());
options.set_enable_user_interface(enable_dialogs_);
options.set_enable_notifications(enable_notifications_);
options.set_terminate_upon_input(terminate_upon_input_);
if (max_clipboard_size_.has_value()) {
options.set_clipboard_size(max_clipboard_size_.value());
}
// Create the host.
host_ = std::make_unique<ChromotingHost>(
desktop_environment_factory_.get(), std::move(session_manager),
transport_context, host_context_->audio_task_runner(),
host_context_->video_encode_task_runner(), options);
host_->status_monitor()->AddStatusObserver(this);
host_status_logger_ = std::make_unique<HostStatusLogger>(
host_->status_monitor(), log_to_server_.get());
// Create event logger.
host_event_logger_ =
HostEventLogger::Create(host_->status_monitor(), kApplicationName);
// Connect signaling and start the host.
signal_strategy_->Connect();
host_->Start(username);
SetState(It2MeHostState::kRequestedAccessCode, ErrorCode::OK);
return;
}
void It2MeHost::OnAccessDenied(const std::string& jid) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
++failed_login_attempts_;
if (failed_login_attempts_ == kMaxLoginAttempts) {
DisconnectOnNetworkThread();
} else if (connecting_jid_ == NormalizeSignalingId(jid)) {
DCHECK_EQ(state_, It2MeHostState::kConnecting);
connecting_jid_.clear();
confirmation_dialog_proxy_.reset();
SetState(It2MeHostState::kReceivedAccessCode, ErrorCode::OK);
}
}
void It2MeHost::OnClientConnected(const std::string& jid) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
// ChromotingHost doesn't allow concurrent connections and the host is
// destroyed in OnClientDisconnected() after the first connection.
CHECK_NE(state_, It2MeHostState::kConnected);
std::string client_username;
if (!SplitSignalingIdResource(jid, &client_username, /*resource=*/nullptr)) {
LOG(WARNING) << "Incorrectly formatted JID received: " << jid;
client_username = jid;
}
HOST_LOG << "Client " << client_username << " connected.";
// Pass the client user name to the script object before changing state.
host_context_->ui_task_runner()->PostTask(
FROM_HERE, base::BindOnce(&It2MeHost::Observer::OnClientAuthenticated,
observer_, client_username));
SetState(It2MeHostState::kConnected, ErrorCode::OK);
}
void It2MeHost::OnClientDisconnected(const std::string& jid) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
DisconnectOnNetworkThread();
}
ValidationCallback It2MeHost::GetValidationCallbackForTesting() {
return base::BindRepeating(&It2MeHost::ValidateConnectionDetails,
base::Unretained(this));
}
void It2MeHost::OnPolicyUpdate(
std::unique_ptr<base::DictionaryValue> policies) {
// The policy watcher runs on the |ui_task_runner|.
if (!host_context_->network_task_runner()->BelongsToCurrentThread()) {
host_context_->network_task_runner()->PostTask(
FROM_HERE,
base::BindOnce(&It2MeHost::OnPolicyUpdate, this, std::move(policies)));
return;
}
// The policy to disallow remote support connections should not apply to
// support sessions initiated by the enterprise admin via a RemoteCommand.
if (!is_enterprise_session_) {
// Retrieve the policy value on whether to allow connections but don't apply
// it until after we've finished reading the rest of the policies and
// started the connection process.
absl::optional<bool> remote_support_connections_allowed =
policies->FindBoolKey(
policy::key::kRemoteAccessHostAllowRemoteSupportConnections);
remote_support_connections_allowed_ =
remote_support_connections_allowed.value_or(true);
}
absl::optional<bool> nat_policy_value =
policies->FindBoolKey(policy::key::kRemoteAccessHostFirewallTraversal);
if (!nat_policy_value.has_value()) {
HOST_LOG << "Failed to read kRemoteAccessHostFirewallTraversal policy";
nat_policy_value = nat_traversal_enabled_;
}
absl::optional<bool> relay_policy_value = policies->FindBoolKey(
policy::key::kRemoteAccessHostAllowRelayedConnection);
if (!relay_policy_value.has_value()) {
HOST_LOG << "Failed to read kRemoteAccessHostAllowRelayedConnection policy";
relay_policy_value = relay_connections_allowed_;
}
UpdateNatPolicies(nat_policy_value.value(), relay_policy_value.value());
const base::ListValue* host_domain_list;
if (policies->GetList(policy::key::kRemoteAccessHostDomainList,
&host_domain_list)) {
std::vector<std::string> host_domain_list_vector;
for (const auto& value : host_domain_list->GetList()) {
host_domain_list_vector.push_back(value.GetString());
}
UpdateHostDomainListPolicy(std::move(host_domain_list_vector));
}
const base::ListValue* client_domain_list;
if (policies->GetList(policy::key::kRemoteAccessHostClientDomainList,
&client_domain_list)) {
std::vector<std::string> client_domain_list_vector;
for (const auto& value : client_domain_list->GetList()) {
client_domain_list_vector.push_back(value.GetString());
}
UpdateClientDomainListPolicy(std::move(client_domain_list_vector));
}
std::string port_range_string;
if (policies->GetString(policy::key::kRemoteAccessHostUdpPortRange,
&port_range_string)) {
UpdateHostUdpPortRangePolicy(port_range_string);
}
int max_clipboard_size;
if (policies->GetInteger(policy::key::kRemoteAccessHostClipboardSizeBytes,
&max_clipboard_size)) {
if (max_clipboard_size >= 0) {
max_clipboard_size_ = max_clipboard_size;
}
}
}
void It2MeHost::UpdateNatPolicies(bool nat_policy_value,
bool relay_policy_value) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
VLOG(2) << "UpdateNatPolicies: nat_policy_value: " << nat_policy_value;
bool nat_traversal_value_changed = nat_traversal_enabled_ != nat_policy_value;
nat_traversal_enabled_ = nat_policy_value;
VLOG(2) << "UpdateNatPolicies: relay_policy_value: " << relay_policy_value;
bool relay_value_changed = relay_connections_allowed_ != relay_policy_value;
relay_connections_allowed_ = relay_policy_value;
// Force disconnect when transitioning either policy setting to disabled.
if (((nat_traversal_value_changed && !nat_traversal_enabled_) ||
(relay_value_changed && !relay_connections_allowed_)) &&
IsRunning()) {
DisconnectOnNetworkThread();
}
// Notify listeners of the policy setting change.
host_context_->ui_task_runner()->PostTask(
FROM_HERE,
base::BindOnce(&It2MeHost::Observer::OnNatPoliciesChanged, observer_,
nat_traversal_enabled_, relay_connections_allowed_));
}
void It2MeHost::UpdateHostDomainListPolicy(
std::vector<std::string> host_domain_list) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
VLOG(2) << "UpdateHostDomainListPolicy: "
<< base::JoinString(host_domain_list, ", ");
// When setting a host domain policy, force disconnect any existing session.
if (!host_domain_list.empty() && IsRunning()) {
DisconnectOnNetworkThread();
}
required_host_domain_list_ = std::move(host_domain_list);
}
void It2MeHost::UpdateClientDomainListPolicy(
std::vector<std::string> client_domain_list) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
VLOG(2) << "UpdateClientDomainPolicy: "
<< base::JoinString(client_domain_list, ", ");
// When setting a client domain policy, disconnect any existing session.
if (!client_domain_list.empty() && IsRunning()) {
DisconnectOnNetworkThread();
}
required_client_domain_list_ = std::move(client_domain_list);
}
void It2MeHost::UpdateHostUdpPortRangePolicy(
const std::string& port_range_string) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
VLOG(2) << "UpdateHostUdpPortRangePolicy: " << port_range_string;
if (IsRunning()) {
DisconnectOnNetworkThread();
}
if (!PortRange::Parse(port_range_string, &udp_port_range_)) {
// PolicyWatcher verifies that the value is formatted correctly.
LOG(FATAL) << "Invalid port range: " << port_range_string;
}
}
void It2MeHost::SetState(It2MeHostState state, ErrorCode error_code) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
switch (state_) {
case It2MeHostState::kDisconnected:
DCHECK(state == It2MeHostState::kStarting ||
state == It2MeHostState::kError)
<< It2MeHostStateToString(state);
break;
case It2MeHostState::kStarting:
DCHECK(state == It2MeHostState::kRequestedAccessCode ||
state == It2MeHostState::kDisconnected ||
state == It2MeHostState::kError ||
state == It2MeHostState::kInvalidDomainError)
<< It2MeHostStateToString(state);
break;
case It2MeHostState::kRequestedAccessCode:
DCHECK(state == It2MeHostState::kReceivedAccessCode ||
state == It2MeHostState::kDisconnected ||
state == It2MeHostState::kError)
<< It2MeHostStateToString(state);
break;
case It2MeHostState::kReceivedAccessCode:
DCHECK(state == It2MeHostState::kConnecting ||
state == It2MeHostState::kDisconnected ||
state == It2MeHostState::kError)
<< It2MeHostStateToString(state);
break;
case It2MeHostState::kConnecting:
DCHECK(state == It2MeHostState::kConnected ||
state == It2MeHostState::kDisconnected ||
state == It2MeHostState::kError)
<< It2MeHostStateToString(state);
break;
case It2MeHostState::kConnected:
DCHECK(state == It2MeHostState::kDisconnected ||
state == It2MeHostState::kError)
<< It2MeHostStateToString(state);
break;
case It2MeHostState::kError:
DCHECK(state == It2MeHostState::kDisconnected)
<< It2MeHostStateToString(state);
break;
case It2MeHostState::kInvalidDomainError:
DCHECK(state == It2MeHostState::kDisconnected)
<< It2MeHostStateToString(state);
break;
}
state_ = state;
// Post a state-change notification to the web-app.
host_context_->ui_task_runner()->PostTask(
FROM_HERE, base::BindOnce(&It2MeHost::Observer::OnStateChanged, observer_,
state, error_code));
}
bool It2MeHost::IsRunning() const {
return state_ == It2MeHostState::kRequestedAccessCode ||
state_ == It2MeHostState::kReceivedAccessCode ||
state_ == It2MeHostState::kConnected ||
state_ == It2MeHostState::kConnecting;
}
void It2MeHost::OnReceivedSupportID(const std::string& support_id,
const base::TimeDelta& lifetime,
const ErrorCode error_code) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
if (error_code != ErrorCode::OK) {
SetState(It2MeHostState::kError, error_code);
DisconnectOnNetworkThread();
return;
}
std::string host_secret = GenerateSupportHostSecret();
std::string access_code = support_id + host_secret;
std::string access_code_hash =
protocol::GetSharedSecretHash(support_id, access_code);
std::string local_certificate = host_key_pair_->GenerateCertificate();
if (local_certificate.empty()) {
LOG(ERROR) << "Failed to generate host certificate.";
SetState(It2MeHostState::kError, ErrorCode::HOST_CERTIFICATE_ERROR);
DisconnectOnNetworkThread();
return;
}
std::unique_ptr<protocol::AuthenticatorFactory> factory(
new protocol::It2MeHostAuthenticatorFactory(
local_certificate, host_key_pair_, access_code_hash,
base::BindRepeating(&It2MeHost::ValidateConnectionDetails,
base::Unretained(this))));
host_->SetAuthenticatorFactory(std::move(factory));
// Pass the Access Code to the script object before changing state.
host_context_->ui_task_runner()->PostTask(
FROM_HERE, base::BindOnce(&It2MeHost::Observer::OnStoreAccessCode,
observer_, access_code, lifetime));
SetState(It2MeHostState::kReceivedAccessCode, ErrorCode::OK);
}
void It2MeHost::DisconnectOnNetworkThread(protocol::ErrorCode error_code) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
// Disconnect() may be called even after the host has already been stopped.
// Ignore repeated calls.
if (state_ == It2MeHostState::kDisconnected) {
return;
}
confirmation_dialog_proxy_.reset();
if (host_) {
host_->status_monitor()->RemoveStatusObserver(this);
host_ = nullptr;
}
register_request_ = nullptr;
host_status_logger_ = nullptr;
log_to_server_ = nullptr;
ftl_signaling_connector_ = nullptr;
if (signal_strategy_) {
// Delay destruction of the signaling strategy by a few seconds to give it
// a chance to send any outgoing messages (e.g. session-terminate) so the
// other end of the connection can display and log an accurate disconnect
// reason.
host_context_->network_task_runner()->PostDelayedTask(
FROM_HERE,
base::BindOnce([](std::unique_ptr<SignalStrategy> signaling) {},
std::move(signal_strategy_)),
kDestroySignalingDelay);
}
host_event_logger_ = nullptr;
// Post tasks to delete UI objects on the UI thread.
host_context_->ui_task_runner()->DeleteSoon(
FROM_HERE, desktop_environment_factory_.release());
SetState(It2MeHostState::kDisconnected, error_code);
}
void It2MeHost::ValidateConnectionDetails(
const std::string& original_remote_jid,
ValidationResultCallback result_callback) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
// First ensure the JID we received is valid.
std::string client_username;
if (!SplitSignalingIdResource(original_remote_jid, &client_username,
/*resource=*/nullptr)) {
LOG(ERROR) << "Rejecting incoming connection from " << original_remote_jid
<< ": Invalid JID.";
std::move(result_callback)
.Run(protocol::ValidatingAuthenticator::Result::ERROR_INVALID_ACCOUNT);
DisconnectOnNetworkThread();
return;
}
std::string remote_jid = NormalizeSignalingId(original_remote_jid);
if (client_username.empty()) {
LOG(ERROR) << "Invalid user name passed in: " << remote_jid;
std::move(result_callback)
.Run(protocol::ValidatingAuthenticator::Result::ERROR_INVALID_ACCOUNT);
DisconnectOnNetworkThread();
return;
}
// Check the client domain policy.
if (!required_client_domain_list_.empty()) {
bool matched = false;
for (const auto& domain : required_client_domain_list_) {
if (base::EndsWith(client_username, std::string("@") + domain,
base::CompareCase::INSENSITIVE_ASCII)) {
matched = true;
break;
}
}
if (!matched) {
LOG(ERROR) << "Rejecting incoming connection from " << remote_jid
<< ": Domain not allowed.";
std::move(result_callback).Run(ValidationResult::ERROR_INVALID_ACCOUNT);
DisconnectOnNetworkThread();
return;
}
}
// If we receive valid connection details multiple times, then we don't know
// which remote user (if either) is valid so disconnect everyone.
if (state_ != It2MeHostState::kReceivedAccessCode) {
DCHECK_EQ(It2MeHostState::kConnecting, state_);
LOG(ERROR) << "Received too many connection requests.";
std::move(result_callback)
.Run(ValidationResult::ERROR_TOO_MANY_CONNECTIONS);
DisconnectOnNetworkThread();
return;
}
HOST_LOG << "Client " << client_username << " connecting.";
connecting_jid_ = remote_jid;
SetState(It2MeHostState::kConnecting, ErrorCode::OK);
// Show a confirmation dialog to the user to allow them to confirm/reject it.
// If dialogs are suppressed, just call the callback directly.
if (enable_dialogs_) {
confirmation_dialog_proxy_ = std::make_unique<It2MeConfirmationDialogProxy>(
host_context_->ui_task_runner(),
confirmation_dialog_factory_->Create());
confirmation_dialog_proxy_->Show(
client_username,
base::BindOnce(&It2MeHost::OnConfirmationResult, base::Unretained(this),
std::move(result_callback)));
} else {
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::BindOnce(std::move(result_callback), ValidationResult::SUCCESS));
}
}
void It2MeHost::OnConfirmationResult(ValidationResultCallback result_callback,
It2MeConfirmationDialog::Result result) {
DCHECK(host_context_->network_task_runner()->BelongsToCurrentThread());
connecting_jid_.clear();
switch (result) {
case It2MeConfirmationDialog::Result::OK:
std::move(result_callback).Run(ValidationResult::SUCCESS);
break;
case It2MeConfirmationDialog::Result::CANCEL:
std::move(result_callback).Run(ValidationResult::ERROR_REJECTED_BY_USER);
DisconnectOnNetworkThread(ErrorCode::SESSION_REJECTED);
break;
}
}
It2MeHostFactory::It2MeHostFactory() = default;
It2MeHostFactory::~It2MeHostFactory() = default;
scoped_refptr<It2MeHost> It2MeHostFactory::CreateIt2MeHost() {
return new It2MeHost();
}
} // namespace remoting