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/*
* Copyright (C) 2009-2010 Big Muscle, http://strongdc.sourceforge.net/
* Copyright (C) 2019 Boris Pek <tehnick-8@yandex.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "stdafx.h"
#include "Constants.h"
#include "ConnectionManager.h"
#include "DHT.h"
#include "dcpp/ConnectionManager.h"
#include "dcpp/CryptoManager.h"
#include "dcpp/ClientManager.h"
namespace dht
{
ConnectionManager::ConnectionManager(void)
{
}
ConnectionManager::~ConnectionManager(void)
{
}
/*
* Sends Connect To Me request to online node
*/
void ConnectionManager::connect(const Node::Ptr& node, const string& token)
{
ConnectionManager::connect(node, token, CryptoManager::getInstance()->TLSOk() && node->getUser()->isSet(User::TLS));
}
void ConnectionManager::connect(const Node::Ptr& node, const string& token, bool secure)
{
// don't allow connection if we didn't proceed a handshake
if(!node->isOnline())
{
// do handshake at first
DHT::getInstance()->info(node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
DHT::PING | DHT::MAKE_ONLINE, node->getUser()->getCID(), node->getUdpKey());
return;
}
bool active = ClientManager::getInstance()->isActive();
// if I am not active, send reverse connect to me request
AdcCommand cmd(active ? AdcCommand::CMD_CTM : AdcCommand::CMD_RCM, AdcCommand::TYPE_UDP);
cmd.addParam(secure ? SECURE_CLIENT_PROTOCOL_TEST : CLIENT_PROTOCOL);
if(active)
{
string port = secure ? dcpp::ConnectionManager::getInstance()->getSecurePort() : dcpp::ConnectionManager::getInstance()->getPort();
cmd.addParam(port);
}
cmd.addParam(token);
DHT::getInstance()->send(cmd, node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
node->getUser()->getCID(), node->getUdpKey());
}
/*
* Creates connection to specified node
*/
void ConnectionManager::connectToMe(const Node::Ptr& node, const AdcCommand& cmd)
{
// don't allow connection if we didn't proceed a handshake
if(!node->isOnline())
{
// do handshake at first
DHT::getInstance()->info(node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
DHT::PING | DHT::MAKE_ONLINE, node->getUser()->getCID(), node->getUdpKey());
return;
}
const string& protocol = cmd.getParam(1);
const string& port = cmd.getParam(2);
const string& token = cmd.getParam(3);
bool secure = false;
if(protocol == CLIENT_PROTOCOL)
{
// Nothing special
}
else if(protocol == SECURE_CLIENT_PROTOCOL_TEST && CryptoManager::getInstance()->TLSOk())
{
secure = true;
}
else
{
AdcCommand cmd(AdcCommand::SEV_FATAL, AdcCommand::ERROR_PROTOCOL_UNSUPPORTED, "Protocol unknown", AdcCommand::TYPE_UDP);
cmd.addParam("PR", protocol);
cmd.addParam("TO", token);
DHT::getInstance()->send(cmd, node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
node->getUser()->getCID(), node->getUdpKey());
return;
}
if(!node->getIdentity().isTcpActive())
{
AdcCommand err(AdcCommand::SEV_FATAL, AdcCommand::ERROR_PROTOCOL_GENERIC, "IP unknown", AdcCommand::TYPE_UDP);
DHT::getInstance()->send(err, node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
node->getUser()->getCID(), node->getUdpKey());
return;
}
dcpp::ConnectionManager::getInstance()->adcConnect(*node, port, token, secure);
}
/*
* Sends request to create connection with me
*/
void ConnectionManager::revConnectToMe(const Node::Ptr& node, const AdcCommand& cmd)
{
// don't allow connection if we didn't proceed a handshake
//if(!node->isOnline())
// return;
// this is valid for active-passive connections only
if(!ClientManager::getInstance()->isActive())
return;
const string& protocol = cmd.getParam(1);
const string& token = cmd.getParam(2);
bool secure;
if(protocol == CLIENT_PROTOCOL)
{
secure = false;
}
else if(protocol == SECURE_CLIENT_PROTOCOL_TEST && CryptoManager::getInstance()->TLSOk())
{
secure = true;
}
else
{
AdcCommand sta(AdcCommand::SEV_FATAL, AdcCommand::ERROR_PROTOCOL_UNSUPPORTED, "Protocol unknown", AdcCommand::TYPE_UDP);
sta.addParam("PR", protocol);
sta.addParam("TO", token);
DHT::getInstance()->send(sta, node->getIdentity().getIp(), node->getIdentity().getUdpPort(),
node->getUser()->getCID(), node->getUdpKey());
return;
}
ConnectionManager::connect(node, token, secure);
}
}
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