tdesktop/Telegram/SourceFiles/calls/calls_call.cpp

689 lines
22 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "calls/calls_call.h"
#include "auth_session.h"
#include "mainwidget.h"
#include "lang/lang_keys.h"
#include "boxes/confirm_box.h"
#include "boxes/rate_call_box.h"
#include "calls/calls_instance.h"
#include "base/openssl_help.h"
#include "mtproto/connection.h"
#include "media/media_audio_track.h"
#include "calls/calls_panel.h"
#ifdef slots
#undef slots
#define NEED_TO_RESTORE_SLOTS
#endif // slots
#include <VoIPController.h>
#include <VoIPServerConfig.h>
#ifdef NEED_TO_RESTORE_SLOTS
#define slots Q_SLOTS
#undef NEED_TO_RESTORE_SLOTS
#endif // NEED_TO_RESTORE_SLOTS
namespace Calls {
namespace {
constexpr auto kMinLayer = 65;
constexpr auto kMaxLayer = 65; // MTP::CurrentLayer?
constexpr auto kHangupTimeoutMs = 5000;
using tgvoip::Endpoint;
void ConvertEndpoint(std::vector<tgvoip::Endpoint> &ep, const MTPDphoneConnection &mtc) {
if (mtc.vpeer_tag.v.length() != 16) {
return;
}
auto ipv4 = tgvoip::IPv4Address(std::string(mtc.vip.v.constData(), mtc.vip.v.size()));
auto ipv6 = tgvoip::IPv6Address(std::string(mtc.vipv6.v.constData(), mtc.vipv6.v.size()));
ep.push_back(Endpoint((int64_t)mtc.vid.v, (uint16_t)mtc.vport.v, ipv4, ipv6, EP_TYPE_UDP_RELAY, (unsigned char*)mtc.vpeer_tag.v.data()));
}
constexpr auto kFingerprintDataSize = 256;
uint64 ComputeFingerprint(const std::array<gsl::byte, kFingerprintDataSize> &authKey) {
auto hash = openssl::Sha1(authKey);
return (gsl::to_integer<uint64>(hash[19]) << 56)
| (gsl::to_integer<uint64>(hash[18]) << 48)
| (gsl::to_integer<uint64>(hash[17]) << 40)
| (gsl::to_integer<uint64>(hash[16]) << 32)
| (gsl::to_integer<uint64>(hash[15]) << 24)
| (gsl::to_integer<uint64>(hash[14]) << 16)
| (gsl::to_integer<uint64>(hash[13]) << 8)
| (gsl::to_integer<uint64>(hash[12]));
}
} // namespace
Call::Call(not_null<Delegate*> delegate, not_null<UserData*> user, Type type)
: _delegate(delegate)
, _user(user)
, _type(type) {
_discardByTimeoutTimer.setCallback([this] { hangup(); });
if (_type == Type::Outgoing) {
setState(State::Requesting);
} else {
startWaitingTrack();
}
}
void Call::generateModExpFirst(base::const_byte_span randomSeed) {
auto first = MTP::CreateModExp(_dhConfig.g, _dhConfig.p, randomSeed);
if (first.modexp.empty()) {
LOG(("Call Error: Could not compute mod-exp first."));
finish(FinishType::Failed);
return;
}
_randomPower = first.randomPower;
if (_type == Type::Incoming) {
_gb = std::move(first.modexp);
} else {
_ga = std::move(first.modexp);
_gaHash = openssl::Sha256(_ga);
}
}
bool Call::isIncomingWaiting() const {
if (type() != Call::Type::Incoming) {
return false;
}
return (_state == State::Starting) || (_state == State::WaitingIncoming);
}
void Call::start(base::const_byte_span random) {
// Save config here, because it is possible that it changes between
// different usages inside the same call.
_dhConfig = _delegate->getDhConfig();
Assert(_dhConfig.g != 0);
Assert(!_dhConfig.p.empty());
generateModExpFirst(random);
if (_state == State::Starting || _state == State::Requesting) {
if (_type == Type::Outgoing) {
startOutgoing();
} else {
startIncoming();
}
} else if (_state == State::ExchangingKeys && _answerAfterDhConfigReceived) {
answer();
}
}
void Call::startOutgoing() {
Expects(_type == Type::Outgoing);
Expects(_state == State::Requesting);
request(MTPphone_RequestCall(_user->inputUser, MTP_int(rand_value<int32>()), MTP_bytes(_gaHash), MTP_phoneCallProtocol(MTP_flags(MTPDphoneCallProtocol::Flag::f_udp_p2p | MTPDphoneCallProtocol::Flag::f_udp_reflector), MTP_int(kMinLayer), MTP_int(kMaxLayer)))).done([this](const MTPphone_PhoneCall &result) {
Expects(result.type() == mtpc_phone_phoneCall);
setState(State::Waiting);
auto &call = result.c_phone_phoneCall();
App::feedUsers(call.vusers);
if (call.vphone_call.type() != mtpc_phoneCallWaiting) {
LOG(("Call Error: Expected phoneCallWaiting in response to phone.requestCall()"));
finish(FinishType::Failed);
return;
}
auto &phoneCall = call.vphone_call;
auto &waitingCall = phoneCall.c_phoneCallWaiting();
_id = waitingCall.vid.v;
_accessHash = waitingCall.vaccess_hash.v;
if (_finishAfterRequestingCall != FinishType::None) {
if (_finishAfterRequestingCall == FinishType::Failed) {
finish(_finishAfterRequestingCall);
} else {
hangup();
}
return;
}
_discardByTimeoutTimer.callOnce(Global::CallReceiveTimeoutMs());
handleUpdate(phoneCall);
}).fail([this](const RPCError &error) {
handleRequestError(error);
}).send();
}
void Call::startIncoming() {
Expects(_type == Type::Incoming);
Expects(_state == State::Starting);
request(MTPphone_ReceivedCall(MTP_inputPhoneCall(MTP_long(_id), MTP_long(_accessHash)))).done([this](const MTPBool &result) {
if (_state == State::Starting) {
setState(State::WaitingIncoming);
}
}).fail([this](const RPCError &error) {
handleRequestError(error);
}).send();
}
void Call::answer() {
Expects(_type == Type::Incoming);
if (_state != State::Starting && _state != State::WaitingIncoming) {
if (_state != State::ExchangingKeys || !_answerAfterDhConfigReceived) {
return;
}
}
setState(State::ExchangingKeys);
if (_gb.empty()) {
_answerAfterDhConfigReceived = true;
return;
} else {
_answerAfterDhConfigReceived = false;
}
request(MTPphone_AcceptCall(MTP_inputPhoneCall(MTP_long(_id), MTP_long(_accessHash)), MTP_bytes(_gb), _protocol)).done([this](const MTPphone_PhoneCall &result) {
Expects(result.type() == mtpc_phone_phoneCall);
auto &call = result.c_phone_phoneCall();
App::feedUsers(call.vusers);
if (call.vphone_call.type() != mtpc_phoneCallWaiting) {
LOG(("Call Error: Expected phoneCallWaiting in response to phone.acceptCall()"));
finish(FinishType::Failed);
return;
}
handleUpdate(call.vphone_call);
}).fail([this](const RPCError &error) {
handleRequestError(error);
}).send();
}
void Call::setMute(bool mute) {
_mute = mute;
if (_controller) {
_controller->SetMicMute(_mute);
}
_muteChanged.notify(_mute);
}
TimeMs Call::getDurationMs() const {
return _startTime ? (getms(true) - _startTime) : 0;
}
void Call::hangup() {
if (_state == State::Busy) {
_delegate->callFinished(this);
} else {
auto missed = (_state == State::Ringing || (_state == State::Waiting && _type == Type::Outgoing));
auto declined = isIncomingWaiting();
auto reason = missed ? MTP_phoneCallDiscardReasonMissed() :
declined ? MTP_phoneCallDiscardReasonBusy() : MTP_phoneCallDiscardReasonHangup();
finish(FinishType::Ended, reason);
}
}
void Call::redial() {
if (_state != State::Busy) {
return;
}
Assert(_controller == nullptr);
_type = Type::Outgoing;
setState(State::Requesting);
_answerAfterDhConfigReceived = false;
startWaitingTrack();
_delegate->callRedial(this);
}
QString Call::getDebugLog() const {
constexpr auto kDebugLimit = 4096;
auto bytes = base::byte_vector(kDebugLimit, gsl::byte {});
_controller->GetDebugString(reinterpret_cast<char*>(bytes.data()), bytes.size());
auto end = std::find(bytes.begin(), bytes.end(), gsl::byte {});
auto size = (end - bytes.begin());
return QString::fromUtf8(reinterpret_cast<const char*>(bytes.data()), size);
}
void Call::startWaitingTrack() {
_waitingTrack = Media::Audio::Current().createTrack();
auto trackFileName = Auth().settings().getSoundPath(
(_type == Type::Outgoing)
? qsl("call_outgoing")
: qsl("call_incoming"));
_waitingTrack->samplePeakEach(kSoundSampleMs);
_waitingTrack->fillFromFile(trackFileName);
_waitingTrack->playInLoop();
}
float64 Call::getWaitingSoundPeakValue() const {
if (_waitingTrack) {
auto when = getms() + kSoundSampleMs / 4;
return _waitingTrack->getPeakValue(when);
}
return 0.;
}
bool Call::isKeyShaForFingerprintReady() const {
return (_keyFingerprint != 0);
}
base::byte_array<Call::kSha256Size> Call::getKeyShaForFingerprint() const {
Expects(isKeyShaForFingerprintReady());
Expects(!_ga.empty());
auto encryptedChatAuthKey = base::byte_vector(_authKey.size() + _ga.size(), gsl::byte {});
base::copy_bytes(gsl::make_span(encryptedChatAuthKey).subspan(0, _authKey.size()), _authKey);
base::copy_bytes(gsl::make_span(encryptedChatAuthKey).subspan(_authKey.size(), _ga.size()), _ga);
return openssl::Sha256(encryptedChatAuthKey);
}
bool Call::handleUpdate(const MTPPhoneCall &call) {
switch (call.type()) {
case mtpc_phoneCallRequested: {
auto &data = call.c_phoneCallRequested();
if (_type != Type::Incoming
|| _id != 0
|| peerToUser(_user->id) != data.vadmin_id.v) {
Unexpected("phoneCallRequested call inside an existing call handleUpdate()");
}
if (Auth().userId() != data.vparticipant_id.v) {
LOG(("Call Error: Wrong call participant_id %1, expected %2.").arg(data.vparticipant_id.v).arg(Auth().userId()));
finish(FinishType::Failed);
return true;
}
_id = data.vid.v;
_accessHash = data.vaccess_hash.v;
_protocol = data.vprotocol;
auto gaHashBytes = bytesFromMTP(data.vg_a_hash);
if (gaHashBytes.size() != _gaHash.size()) {
LOG(("Call Error: Wrong g_a_hash size %1, expected %2.").arg(gaHashBytes.size()).arg(_gaHash.size()));
finish(FinishType::Failed);
return true;
}
base::copy_bytes(gsl::make_span(_gaHash), gaHashBytes);
} return true;
case mtpc_phoneCallEmpty: {
auto &data = call.c_phoneCallEmpty();
if (data.vid.v != _id) {
return false;
}
LOG(("Call Error: phoneCallEmpty received."));
finish(FinishType::Failed);
} return true;
case mtpc_phoneCallWaiting: {
auto &data = call.c_phoneCallWaiting();
if (data.vid.v != _id) {
return false;
}
if (_type == Type::Outgoing && _state == State::Waiting && data.vreceive_date.v != 0) {
_discardByTimeoutTimer.callOnce(Global::CallRingTimeoutMs());
setState(State::Ringing);
startWaitingTrack();
}
} return true;
case mtpc_phoneCall: {
auto &data = call.c_phoneCall();
if (data.vid.v != _id) {
return false;
}
if (_type == Type::Incoming && _state == State::ExchangingKeys) {
startConfirmedCall(data);
}
} return true;
case mtpc_phoneCallDiscarded: {
auto &data = call.c_phoneCallDiscarded();
if (data.vid.v != _id) {
return false;
}
if (data.is_need_debug()) {
auto debugLog = _controller ? _controller->GetDebugLog() : std::string();
if (!debugLog.empty()) {
MTP::send(MTPphone_SaveCallDebug(MTP_inputPhoneCall(MTP_long(_id), MTP_long(_accessHash)), MTP_dataJSON(MTP_string(debugLog))));
}
}
if (data.is_need_rating() && _id && _accessHash) {
Ui::show(Box<RateCallBox>(_id, _accessHash));
}
if (data.has_reason() && data.vreason.type() == mtpc_phoneCallDiscardReasonDisconnect) {
LOG(("Call Info: Discarded with DISCONNECT reason."));
}
if (data.has_reason() && data.vreason.type() == mtpc_phoneCallDiscardReasonBusy) {
setState(State::Busy);
} else if (_type == Type::Outgoing || _state == State::HangingUp) {
setState(State::Ended);
} else {
setState(State::EndedByOtherDevice);
}
} return true;
case mtpc_phoneCallAccepted: {
auto &data = call.c_phoneCallAccepted();
if (data.vid.v != _id) {
return false;
}
if (_type != Type::Outgoing) {
LOG(("Call Error: Unexpected phoneCallAccepted for an incoming call."));
finish(FinishType::Failed);
} else if (checkCallFields(data)) {
confirmAcceptedCall(data);
}
} return true;
}
Unexpected("phoneCall type inside an existing call handleUpdate()");
}
void Call::confirmAcceptedCall(const MTPDphoneCallAccepted &call) {
Expects(_type == Type::Outgoing);
auto firstBytes = bytesFromMTP(call.vg_b);
auto computedAuthKey = MTP::CreateAuthKey(firstBytes, _randomPower, _dhConfig.p);
if (computedAuthKey.empty()) {
LOG(("Call Error: Could not compute mod-exp final."));
finish(FinishType::Failed);
return;
}
MTP::AuthKey::FillData(_authKey, computedAuthKey);
_keyFingerprint = ComputeFingerprint(_authKey);
setState(State::ExchangingKeys);
request(MTPphone_ConfirmCall(MTP_inputPhoneCall(MTP_long(_id), MTP_long(_accessHash)), MTP_bytes(_ga), MTP_long(_keyFingerprint), MTP_phoneCallProtocol(MTP_flags(MTPDphoneCallProtocol::Flag::f_udp_p2p | MTPDphoneCallProtocol::Flag::f_udp_reflector), MTP_int(kMinLayer), MTP_int(kMaxLayer)))).done([this](const MTPphone_PhoneCall &result) {
Expects(result.type() == mtpc_phone_phoneCall);
auto &call = result.c_phone_phoneCall();
App::feedUsers(call.vusers);
if (call.vphone_call.type() != mtpc_phoneCall) {
LOG(("Call Error: Expected phoneCall in response to phone.confirmCall()"));
finish(FinishType::Failed);
return;
}
createAndStartController(call.vphone_call.c_phoneCall());
}).fail([this](const RPCError &error) {
handleRequestError(error);
}).send();
}
void Call::startConfirmedCall(const MTPDphoneCall &call) {
Expects(_type == Type::Incoming);
auto firstBytes = bytesFromMTP(call.vg_a_or_b);
if (_gaHash != openssl::Sha256(firstBytes)) {
LOG(("Call Error: Wrong g_a hash received."));
finish(FinishType::Failed);
return;
}
_ga = base::byte_vector(firstBytes.begin(), firstBytes.end());
auto computedAuthKey = MTP::CreateAuthKey(firstBytes, _randomPower, _dhConfig.p);
if (computedAuthKey.empty()) {
LOG(("Call Error: Could not compute mod-exp final."));
finish(FinishType::Failed);
return;
}
MTP::AuthKey::FillData(_authKey, computedAuthKey);
_keyFingerprint = ComputeFingerprint(_authKey);
createAndStartController(call);
}
void Call::createAndStartController(const MTPDphoneCall &call) {
_discardByTimeoutTimer.cancel();
if (!checkCallFields(call)) {
return;
}
voip_config_t config = { 0 };
config.data_saving = DATA_SAVING_NEVER;
#ifdef Q_OS_MAC
config.enableAEC = (QSysInfo::macVersion() < QSysInfo::MV_10_7);
#else // Q_OS_MAC
config.enableAEC = true;
#endif // Q_OS_MAC
config.enableNS = true;
config.enableAGC = true;
config.init_timeout = Global::CallConnectTimeoutMs() / 1000;
config.recv_timeout = Global::CallPacketTimeoutMs() / 1000;
if (cDebug()) {
auto callLogFolder = cWorkingDir() + qsl("DebugLogs");
auto callLogPath = callLogFolder + qsl("/last_call_log.txt");
auto callLogNative = QFile::encodeName(QDir::toNativeSeparators(callLogPath));
auto callLogBytesSrc = gsl::as_bytes(gsl::make_span(callLogNative));
auto callLogBytesDst = gsl::as_writeable_bytes(gsl::make_span(config.logFilePath));
if (callLogBytesSrc.size() + 1 <= callLogBytesDst.size()) { // +1 - zero-terminator
QFile(callLogPath).remove();
QDir().mkpath(callLogFolder);
base::copy_bytes(callLogBytesDst, callLogBytesSrc);
}
}
std::vector<Endpoint> endpoints;
ConvertEndpoint(endpoints, call.vconnection.c_phoneConnection());
for (int i = 0; i < call.valternative_connections.v.length(); i++) {
ConvertEndpoint(endpoints, call.valternative_connections.v[i].c_phoneConnection());
}
_controller = std::make_unique<tgvoip::VoIPController>();
if (_mute) {
_controller->SetMicMute(_mute);
}
_controller->implData = static_cast<void*>(this);
_controller->SetRemoteEndpoints(endpoints, true);
_controller->SetConfig(&config);
_controller->SetEncryptionKey(reinterpret_cast<char*>(_authKey.data()), (_type == Type::Outgoing));
_controller->SetStateCallback([](tgvoip::VoIPController *controller, int state) {
static_cast<Call*>(controller->implData)->handleControllerStateChange(controller, state);
});
_controller->Start();
_controller->Connect();
}
void Call::handleControllerStateChange(tgvoip::VoIPController *controller, int state) {
// NB! Can be called from an arbitrary thread!
// Expects(controller == _controller.get()); This can be called from ~VoIPController()!
Expects(controller->implData == static_cast<void*>(this));
switch (state) {
case STATE_WAIT_INIT: {
DEBUG_LOG(("Call Info: State changed to WaitingInit."));
setStateQueued(State::WaitingInit);
} break;
case STATE_WAIT_INIT_ACK: {
DEBUG_LOG(("Call Info: State changed to WaitingInitAck."));
setStateQueued(State::WaitingInitAck);
} break;
case STATE_ESTABLISHED: {
DEBUG_LOG(("Call Info: State changed to Established."));
setStateQueued(State::Established);
} break;
case STATE_FAILED: {
auto error = controller->GetLastError();
LOG(("Call Info: State changed to Failed, error: %1.").arg(error));
setFailedQueued(error);
} break;
default: LOG(("Call Error: Unexpected state in handleStateChange: %1").arg(state));
}
}
template <typename T>
bool Call::checkCallCommonFields(const T &call) {
auto checkFailed = [this] {
finish(FinishType::Failed);
return false;
};
if (call.vaccess_hash.v != _accessHash) {
LOG(("Call Error: Wrong call access_hash."));
return checkFailed();
}
auto adminId = (_type == Type::Outgoing) ? Auth().userId() : peerToUser(_user->id);
auto participantId = (_type == Type::Outgoing) ? peerToUser(_user->id) : Auth().userId();
if (call.vadmin_id.v != adminId) {
LOG(("Call Error: Wrong call admin_id %1, expected %2.").arg(call.vadmin_id.v).arg(adminId));
return checkFailed();
}
if (call.vparticipant_id.v != participantId) {
LOG(("Call Error: Wrong call participant_id %1, expected %2.").arg(call.vparticipant_id.v).arg(participantId));
return checkFailed();
}
return true;
}
bool Call::checkCallFields(const MTPDphoneCall &call) {
if (!checkCallCommonFields(call)) {
return false;
}
if (call.vkey_fingerprint.v != _keyFingerprint) {
LOG(("Call Error: Wrong call fingerprint."));
finish(FinishType::Failed);
return false;
}
return true;
}
bool Call::checkCallFields(const MTPDphoneCallAccepted &call) {
return checkCallCommonFields(call);
}
void Call::setState(State state) {
if (_state == State::Failed) {
return;
}
if (_state == State::FailedHangingUp && state != State::Failed) {
return;
}
if (_state != state) {
_state = state;
_stateChanged.notify(state, true);
if (true
&& _state != State::Starting
&& _state != State::Requesting
&& _state != State::Waiting
&& _state != State::WaitingIncoming
&& _state != State::Ringing) {
_waitingTrack.reset();
}
if (false
|| _state == State::Ended
|| _state == State::EndedByOtherDevice
|| _state == State::Failed
|| _state == State::Busy) {
// Destroy controller before destroying Call Panel,
// so that the panel hide animation is smooth.
destroyController();
}
switch (_state) {
case State::Established:
_startTime = getms(true);
break;
case State::ExchangingKeys:
_delegate->playSound(Delegate::Sound::Connecting);
break;
case State::Ended:
_delegate->playSound(Delegate::Sound::Ended);
[[fallthrough]];
case State::EndedByOtherDevice:
_delegate->callFinished(this);
break;
case State::Failed:
_delegate->playSound(Delegate::Sound::Ended);
_delegate->callFailed(this);
break;
case State::Busy:
_delegate->playSound(Delegate::Sound::Busy);
break;
}
}
}
void Call::finish(FinishType type, const MTPPhoneCallDiscardReason &reason) {
Expects(type != FinishType::None);
auto finalState = (type == FinishType::Ended) ? State::Ended : State::Failed;
auto hangupState = (type == FinishType::Ended) ? State::HangingUp : State::FailedHangingUp;
if (_state == State::Requesting) {
_finishByTimeoutTimer.call(kHangupTimeoutMs, [this, finalState] { setState(finalState); });
_finishAfterRequestingCall = type;
return;
}
if (_state == State::HangingUp
|| _state == State::FailedHangingUp
|| _state == State::EndedByOtherDevice
|| _state == State::Ended
|| _state == State::Failed) {
return;
}
if (!_id) {
setState(finalState);
return;
}
setState(hangupState);
auto duration = getDurationMs() / 1000;
auto connectionId = _controller ? _controller->GetPreferredRelayID() : 0;
_finishByTimeoutTimer.call(kHangupTimeoutMs, [this, finalState] { setState(finalState); });
request(MTPphone_DiscardCall(MTP_inputPhoneCall(MTP_long(_id), MTP_long(_accessHash)), MTP_int(duration), reason, MTP_long(connectionId))).done([this, finalState](const MTPUpdates &result) {
// This could be destroyed by updates, so we set Ended after
// updates being handled, but in a guarded way.
InvokeQueued(this, [this, finalState] { setState(finalState); });
App::main()->sentUpdatesReceived(result);
}).fail([this, finalState](const RPCError &error) {
setState(finalState);
}).send();
}
void Call::setStateQueued(State state) {
InvokeQueued(this, [this, state] { setState(state); });
}
void Call::setFailedQueued(int error) {
InvokeQueued(this, [this, error] { handleControllerError(error); });
}
void Call::handleRequestError(const RPCError &error) {
if (error.type() == qstr("USER_PRIVACY_RESTRICTED")) {
Ui::show(Box<InformBox>(lng_call_error_not_available(lt_user, App::peerName(_user))));
} else if (error.type() == qstr("PARTICIPANT_VERSION_OUTDATED")) {
Ui::show(Box<InformBox>(lng_call_error_outdated(lt_user, App::peerName(_user))));
} else if (error.type() == qstr("CALL_PROTOCOL_LAYER_INVALID")) {
Ui::show(Box<InformBox>(Lang::Hard::CallErrorIncompatible().replace("{user}", App::peerName(_user))));
}
finish(FinishType::Failed);
}
void Call::handleControllerError(int error) {
if (error == TGVOIP_ERROR_INCOMPATIBLE) {
Ui::show(Box<InformBox>(Lang::Hard::CallErrorIncompatible().replace("{user}", App::peerName(_user))));
} else if (error == TGVOIP_ERROR_AUDIO_IO) {
Ui::show(Box<InformBox>(lang(lng_call_error_audio_io)));
}
finish(FinishType::Failed);
}
void Call::destroyController() {
if (_controller) {
DEBUG_LOG(("Call Info: Destroying call controller.."));
_controller.reset();
DEBUG_LOG(("Call Info: Call controller destroyed."));
}
}
Call::~Call() {
destroyController();
}
void UpdateConfig(const std::map<std::string, std::string> &data) {
tgvoip::ServerConfig::GetSharedInstance()->Update(data);
}
} // namespace Calls