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zeus/tools/gateway-back-end/appl/ClientGateWayInterface.cpp

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/** @file
* @author Edouard DUPIN
* @copyright 2016, Edouard DUPIN, all right reserved
* @license APACHE v2.0 (see license file)
*/
#include <appl/debug.hpp>
#include <appl/ClientGateWayInterface.hpp>
#include <zeus/Future.hpp>
#include <appl/GateWay.hpp>
#include <enet/TcpClient.hpp>
#include <zeus/AbstractFunction.hpp>
static const std::string protocolError = "PROTOCOL-ERROR";
appl::ClientGateWayInterface::ClientGateWayInterface(const std::string& _ip, uint16_t _port, const std::string& _userName, appl::GateWay* _gatewayInterface) :
m_state(appl::ClientGateWayInterface::state::unconnect),
m_gatewayInterface(_gatewayInterface),
m_interfaceGateWayClient() {
APPL_INFO("----------------------------------------");
APPL_INFO("-- NEW Connection to GateWay Font-end --");
APPL_INFO("----------------------------------------");
enet::Tcp connection = std::move(enet::connectTcpClient(_ip, _port));
if (connection.getConnectionStatus() != enet::Tcp::status::link) {
APPL_ERROR("Can not connect the GateWay-front-end");
return;
}
m_interfaceGateWayClient.setInterface(std::move(connection), false, _userName);
m_userConnectionName = _userName;
m_state = appl::ClientGateWayInterface::state::connect;
m_interfaceGateWayClient.connect(this, &appl::ClientGateWayInterface::onClientData);
m_interfaceGateWayClient.connect(true);
m_interfaceGateWayClient.setInterfaceName("cli-" + etk::to_string(m_uid));
}
appl::ClientGateWayInterface::~ClientGateWayInterface() {
APPL_TODO("Call All unlink ...");
stop();
APPL_INFO("-------------------------------------------");
APPL_INFO("-- DELETE Connection to GateWay Font-end --");
APPL_INFO("-------------------------------------------");
}
void appl::ClientGateWayInterface::start(uint64_t _uid, uint64_t _uid2) {
m_uid = _uid;
m_uid2 = _uid2;
m_state = appl::ClientGateWayInterface::state::connect;
m_interfaceGateWayClient.setInterfaceName("cli-" + etk::to_string(m_uid));
APPL_WARNING("[" << m_uid << "] Connect to the user service");
m_userService = m_gatewayInterface->get("user");
if (m_userService == nullptr) {
//answerProtocolError(transactionId, "Gateway internal error 'No user interface'");
// TODO: Can not work at all ==> or create a fallback mode ...
}
/*
else {
zeus::Future<bool> futLocalService = m_userService->m_interfaceClient.callClient(m_uid2, "_new", m_userConnectionName, "**Gateway**", std::vector<std::string>());
futLocalService.wait(); // TODO: Set timeout ...
m_interfaceGateWayClient.answerValue(transactionId, true);
}
APPL_WARNING("[" << m_uid << "] Client must send conection to user name ...");
answerProtocolError(transactionId, "Missing call of connectToUser");
return;
}
*/
}
void appl::ClientGateWayInterface::stop() {
for (auto &it : m_listConnectedService) {
if (it == nullptr) {
continue;
}
it->m_interfaceClient.callClient(m_uid, "_delete");
}
if (m_userService != nullptr) {
m_userService->m_interfaceClient.callClient(m_uid2, "_delete");
m_userService = nullptr;
}
m_listConnectedService.clear();
m_interfaceGateWayClient.disconnect();
}
bool appl::ClientGateWayInterface::isAlive() {
return m_interfaceGateWayClient.isActive();
}
void appl::ClientGateWayInterface::answerProtocolError(uint32_t _transactionId, const std::string& _errorHelp) {
m_interfaceGateWayClient.answerError(_transactionId, protocolError, _errorHelp);
m_state = appl::ClientGateWayInterface::state::disconnect;
m_interfaceGateWayClient.disconnect(true);
}
void appl::ClientGateWayInterface::onClientData(ememory::SharedPtr<zeus::Buffer> _value) {
if (_value == nullptr) {
return;
}
APPL_ERROR("get message from front-end gateWay: " << _value);
uint32_t transactionId = _value->getTransactionId();
if (transactionId == 0) {
APPL_ERROR("Protocol error ==>missing id");
answerProtocolError(transactionId, "missing parameter: 'id'");
return;
}
if (_value->getType() == zeus::Buffer::typeMessage::data) {
// TRANSMIT DATA ...
if (m_state != appl::ClientGateWayInterface::state::clientIdentify) {
answerProtocolError(transactionId, "Not identify to send 'data' buffer (multiple packet element)");
return;
}
uint32_t serviceId = _value->getServiceId();
if (serviceId == 0) {
answerProtocolError(transactionId, "Can not send multiple data on the gateway");
return;
}
serviceId--;
if (serviceId >= m_listConnectedService.size()) {
m_interfaceGateWayClient.answerError(transactionId, "NOT-CONNECTED-SERVICE");
return;
}
if (m_listConnectedService[serviceId] == nullptr) {
// TODO ...
APPL_ERROR("TODO : Manage this case ...");
return;
}
m_listConnectedService[serviceId]->m_interfaceClient.callForwardMultiple(
m_uid,
_value,
(uint64_t(m_uid) << 32) + uint64_t(transactionId));
return;
}
if (_value->getType() != zeus::Buffer::typeMessage::call) {
APPL_ERROR("Protocol error ==>missing 'call'");
answerProtocolError(transactionId, "missing parameter: 'call' / wrong type 'call'");
return;
}
ememory::SharedPtr<zeus::BufferCall> callObj = ememory::staticPointerCast<zeus::BufferCall>(_value);
std::string callFunction = callObj->getCall();
switch (m_state) {
case appl::ClientGateWayInterface::state::disconnect:
case appl::ClientGateWayInterface::state::unconnect:
{
APPL_ERROR("Must never appear");
answerProtocolError(transactionId, "Gateway internal error");
return;
}
case appl::ClientGateWayInterface::state::connect:
{
m_clientServices.clear();
m_clientgroups.clear();
m_clientName.clear();
if ( callFunction != "identify"
&& callFunction != "auth"
&& callFunction != "anonymous") {
answerProtocolError(transactionId, "Client must call: identify/auth/anonymous");
return;
}
if (callFunction == "identify") {
std::string clientName = callObj->getParameter<std::string>(0);
std::string clientTocken = callObj->getParameter<std::string>(1);
if (m_userService == nullptr) {
answerProtocolError(transactionId, "gateWay internal error 3");
return;
}
zeus::Future<bool> fut = m_userService->m_interfaceClient.callClient(m_uid2, "checkTocken", clientName, clientTocken);
fut.wait(); // TODO: Set timeout ...
if (fut.hasError() == true) {
APPL_ERROR("Get error from the service ...");
m_interfaceGateWayClient.answerValue(transactionId, false);
answerProtocolError(transactionId, "connection refused 1");
return;
} else if (fut.get() == false) {
m_interfaceGateWayClient.answerValue(transactionId, false);
answerProtocolError(transactionId, "connection refused 2");
return;
}
m_clientName = clientName;
}
if (callFunction == "auth") {
std::string password = callObj->getParameter<std::string>(0);
zeus::Future<bool> fut = m_userService->m_interfaceClient.callClient(m_uid2, "checkAuth", password);
fut.wait(); // TODO: Set timeout ...
if (fut.hasError() == true) {
APPL_ERROR("Get error from the service ...");
m_interfaceGateWayClient.answerValue(transactionId, false);
answerProtocolError(transactionId, "connection refused 1");
return;
} else if (fut.get() == false) {
m_interfaceGateWayClient.answerValue(transactionId, false);
answerProtocolError(transactionId, "connection refused 2");
return;
}
m_clientName = m_userConnectionName;
}
if (callFunction == "anonymous") {
m_clientName = "";
}
// --------------------------------
// -- Get groups:
// --------------------------------
zeus::Future<std::vector<std::string>> futGroup = m_userService->m_interfaceClient.callClient(m_uid2, "getGroups", m_clientName);
futGroup.wait(); // TODO: Set timeout ...
if (futGroup.hasError() == true) {
APPL_ERROR("Get error from the service ...");
m_interfaceGateWayClient.answerValue(transactionId, false);
answerProtocolError(transactionId, "grouping error");
return;
}
m_clientgroups = futGroup.get();
// --------------------------------
// -- Get services:
// --------------------------------
std::vector<std::string> currentServices = m_gatewayInterface->getAllServiceName();
zeus::Future<std::vector<std::string>> futServices = m_userService->m_interfaceClient.callClient(m_uid2, "filterServices", m_clientName, currentServices);
futServices.wait(); // TODO: Set timeout ...
if (futServices.hasError() == true) {
APPL_ERROR("Get error from the service ...");
m_interfaceGateWayClient.answerValue(transactionId, false);
answerProtocolError(transactionId, "service filtering error");
return;
}
m_clientServices = futServices.get();
APPL_WARNING("Connection of: '" << m_clientName << "' to '" << m_userConnectionName << "'");
APPL_WARNING(" groups: " << etk::to_string(m_clientgroups));
APPL_WARNING(" services: " << etk::to_string(m_clientServices));
m_interfaceGateWayClient.answerValue(transactionId, true);
m_state = appl::ClientGateWayInterface::state::clientIdentify;
return;
}
break;
case appl::ClientGateWayInterface::state::clientIdentify:
{
uint32_t serviceId = callObj->getServiceId();
if (serviceId == 0) {
// This is 2 default service for the cient interface that manage the authorisation of view:
if (callFunction == "getServiceCount") {
m_interfaceGateWayClient.answerValue(transactionId, m_clientServices.size());
return;
}
if (callFunction == "getServiceList") {
m_interfaceGateWayClient.answerValue(transactionId, m_clientServices);
//"ServiceManager/v0.1.0"
return;
}
if (callFunction == "link") {
// first param:
std::string serviceName = callObj->getParameter<std::string>(0);
// Check if service already link:
auto it = m_listConnectedService.begin();
while (it != m_listConnectedService.end()) {
if (*it == nullptr) {
++it;
continue;
}
if ((*it)->getName() != serviceName) {
++it;
continue;
}
break;
}
if (it == m_listConnectedService.end()) {
// check if service is connectable ...
if (std::find(m_clientServices.begin(), m_clientServices.end(), serviceName) == m_clientServices.end()) {
m_interfaceGateWayClient.answerError(transactionId, "UN-AUTHORIZED-SERVICE");
return;
}
ememory::SharedPtr<appl::ServiceInterface> srv = m_gatewayInterface->get(serviceName);
if (srv != nullptr) {
zeus::Future<bool> futLink = srv->m_interfaceClient.callClient(m_uid, "_new", m_userConnectionName, m_clientName, m_clientgroups);
futLink.wait(); // TODO: Set timeout ...
if (futLink.hasError() == true) {
APPL_ERROR("Get error from the service ... LINK");
m_interfaceGateWayClient.answerError(transactionId, "ERROR-CREATE-SERVICE-INSTANCE");
return;
}
m_listConnectedService.push_back(srv);
m_interfaceGateWayClient.answerValue(transactionId, m_listConnectedService.size());
return;
}
m_interfaceGateWayClient.answerError(transactionId, "CAN-NOT-CONNECT-SERVICE");
return;
}
m_interfaceGateWayClient.answerError(transactionId, "SERVICE-ALREADY-CONNECTED");;
return;
}
if (callFunction == "unlink") {
// first param: the service we want to unconnect ...
int64_t localServiceID = callObj->getParameter<int64_t>(0)-1;
// Check if service already link:
if (localServiceID >= m_listConnectedService.size()) {
m_interfaceGateWayClient.answerError(transactionId, "NOT-CONNECTED-SERVICE");
return;
}
zeus::Future<bool> futUnLink = m_listConnectedService[localServiceID]->m_interfaceClient.callClient(m_uid, "_delete");
futUnLink.wait(); // TODO: Set timeout ...
if (futUnLink.hasError() == true) {
APPL_ERROR("Get error from the service ... UNLINK");
m_interfaceGateWayClient.answerError(transactionId, "ERROR-CREATE-SERVICE-INSTANCE");
return;
}
m_listConnectedService[localServiceID] = nullptr;
m_interfaceGateWayClient.answerValue(transactionId, true);
return;
}
APPL_ERROR("Function does not exist ... '" << callFunction << "'");
m_interfaceGateWayClient.answerError(transactionId, "CALL-UNEXISTING");
return;
}
// decrease service ID ...
serviceId -= 1;
if (serviceId >= m_listConnectedService.size()) {
m_interfaceGateWayClient.answerError(transactionId, "NOT-CONNECTED-SERVICE");
return;
} else {
if (m_listConnectedService[serviceId] == nullptr) {
// TODO ...
APPL_ERROR("TODO : Manage this case ...");
return;
}
m_listConnectedService[serviceId]->m_interfaceClient.callForward(
m_uid,
_value,
(uint64_t(m_uid) << 32) + uint64_t(transactionId),
[=](zeus::FutureBase _ret) {
ememory::SharedPtr<zeus::Buffer> tmpp = _ret.getRaw();
if (tmpp == nullptr) {
return true;
}
APPL_DEBUG(" ==> transmit : " << tmpp->getTransactionId() << " -> " << transactionId);
APPL_DEBUG(" msg=" << tmpp);
tmpp->setTransactionId(transactionId);
tmpp->setServiceId(serviceId+1);
APPL_DEBUG("transmit=" << tmpp);
m_interfaceGateWayClient.writeBinary(tmpp);
// multiple send element ...
return tmpp->getPartFinish();
});
}
}
}
}
void appl::ClientGateWayInterface::returnMessage(ememory::SharedPtr<zeus::Buffer> _data) {
APPL_ERROR("Get call from the Service to the user ...");
}
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