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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <mse/streamsocket.h>
#include <util/sha1hash.h>
#include <util/log.h>
#include <kademlia/dhtbase.h>
#include "globals.h"
#include "peerid.h"
#include "authenticatebase.h"
namespace bt
{
AuthenticateBase::AuthenticateBase(mse::StreamSocket* s) : sock(s),finished(false),local(false)
{
connect(&timer,SIGNAL(timeout()),this,SLOT(onTimeout()));
timer.start(20000,true);
memset(handshake,0x00,68);
bytes_of_handshake_recieved = 0;
ext_support = 0;
poll_index = -1;
}
AuthenticateBase::~AuthenticateBase()
{
if (sock)
sock->deleteLater();
}
void AuthenticateBase::sendHandshake(const SHA1Hash & info_hash,const PeerID & our_peer_id)
{
// Out() << "AuthenticateBase::sendHandshake" << endl;
if (!sock) return;
Uint8 hs[68];
makeHandshake(hs,info_hash,our_peer_id);
sock->sendData(hs,68);
}
void AuthenticateBase::makeHandshake(Uint8* hs,const SHA1Hash & info_hash,const PeerID & our_peer_id)
{
const char* pstr = "BitTorrent protocol";
hs[0] = 19;
memcpy(hs+1,pstr,19);
memset(hs+20,0x00,8);
if (Globals::instance().getDHT().isRunning())
hs[27] |= 0x01; // DHT support
hs[25] |= 0x10; // extension protocol
hs[27] |= 0x04; // fast extensions
memcpy(hs+28,info_hash.getData(),20);
memcpy(hs+48,our_peer_id.data(),20);
}
void AuthenticateBase::onReadyRead()
{
Uint32 ba = sock->bytesAvailable();
// Out() << "AuthenticateBase::onReadyRead " << ba << endl;
if (ba == 0)
{
onFinish(false);
return;
}
if (!sock || finished || ba < 48)
return;
// first see if we already have some bytes from the handshake
if (bytes_of_handshake_recieved == 0)
{
if (ba < 68)
{
// read partial
sock->readData(handshake,ba);
bytes_of_handshake_recieved += ba;
if (ba >= 27 && handshake[27] & 0x01)
ext_support |= bt::DHT_SUPPORT;
// tell subclasses of a partial handshake
handshakeRecieved(false);
return;
}
else
{
// read full handshake
sock->readData(handshake,68);
}
}
else
{
// read remaining part
Uint32 to_read = 68 - bytes_of_handshake_recieved;
sock->readData(handshake + bytes_of_handshake_recieved,to_read);
}
if (handshake[0] != 19)
{
onFinish(false);
return;
}
const char* pstr = "BitTorrent protocol";
if (memcmp(pstr,handshake+1,19) != 0)
{
onFinish(false);
return;
}
if (Globals::instance().getDHT().isRunning() && (handshake[27] & 0x01))
ext_support |= bt::DHT_SUPPORT;
if (handshake[27] & 0x04)
ext_support |= bt::FAST_EXT_SUPPORT;
if (handshake[25] & 0x10)
ext_support |= bt::EXT_PROT_SUPPORT;
handshakeRecieved(true);
}
void AuthenticateBase::onError(int)
{
if (finished)
return;
onFinish(false);
}
void AuthenticateBase::onTimeout()
{
if (finished)
return;
Out(SYS_CON|LOG_DEBUG) << "Timeout occurred" << endl;
onFinish(false);
}
void AuthenticateBase::onReadyWrite()
{}
}
#include "authenticatebase.moc"
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