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-rw-r--r--libktorrent/torrent/peer.cpp593
1 files changed, 593 insertions, 0 deletions
diff --git a/libktorrent/torrent/peer.cpp b/libktorrent/torrent/peer.cpp
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+++ b/libktorrent/torrent/peer.cpp
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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 <math.h>
+#include <util/log.h>
+#include <util/functions.h>
+#include <net/address.h>
+#include <mse/streamsocket.h>
+
+#include "peer.h"
+#include "chunk.h"
+#include "piece.h"
+#include "request.h"
+#include "packetreader.h"
+#include "packetwriter.h"
+#include "peerdownloader.h"
+#include "peeruploader.h"
+#include "bdecoder.h"
+#include "bnode.h"
+#include "utpex.h"
+#include "server.h"
+
+using namespace net;
+
+namespace bt
+{
+
+
+
+ static Uint32 peer_id_counter = 1;
+
+
+ Peer::Peer(mse::StreamSocket* sock,const PeerID & peer_id,
+ Uint32 num_chunks,Uint32 chunk_size,Uint32 support,bool local)
+ : sock(sock),pieces(num_chunks),peer_id(peer_id)
+ {
+ id = peer_id_counter;
+ peer_id_counter++;
+
+ ut_pex = 0;
+ preader = new PacketReader(this);
+ choked = am_choked = true;
+ interested = am_interested = false;
+ killed = false;
+ downloader = new PeerDownloader(this,chunk_size);
+ uploader = new PeerUploader(this);
+
+
+ pwriter = new PacketWriter(this);
+ time_choked = GetCurrentTime();
+ time_unchoked = 0;
+
+ connect_time = QTime::currentTime();
+ //sock->attachPeer(this);
+ stats.client = peer_id.identifyClient();
+ stats.ip_address = getIPAddresss();
+ stats.choked = true;
+ stats.download_rate = 0;
+ stats.upload_rate = 0;
+ stats.perc_of_file = 0;
+ stats.snubbed = false;
+ stats.dht_support = support & DHT_SUPPORT;
+ stats.fast_extensions = support & FAST_EXT_SUPPORT;
+ stats.extension_protocol = support & EXT_PROT_SUPPORT;
+ stats.bytes_downloaded = stats.bytes_uploaded = 0;
+ stats.aca_score = 0.0;
+ stats.evil = false;
+ stats.has_upload_slot = false;
+ stats.num_up_requests = stats.num_down_requests = 0;
+ stats.encrypted = sock->encrypted();
+ stats.local = local;
+ if (stats.ip_address == "0.0.0.0")
+ {
+ Out(SYS_CON|LOG_DEBUG) << "No more 0.0.0.0" << endl;
+ kill();
+ }
+ else
+ {
+ sock->startMonitoring(preader,pwriter);
+ }
+ pex_allowed = stats.extension_protocol;
+ utorrent_pex_id = 0;
+ }
+
+
+ Peer::~Peer()
+ {
+ delete ut_pex;
+ delete uploader;
+ delete downloader;
+ delete sock;
+ delete pwriter;
+ delete preader;
+ }
+
+ void Peer::closeConnection()
+ {
+ sock->close();
+ }
+
+
+ void Peer::kill()
+ {
+ sock->close();
+ killed = true;
+ }
+
+
+
+
+ void Peer::packetReady(const Uint8* packet,Uint32 len)
+ {
+ if (killed) return;
+
+ if (len == 0)
+ return;
+ const Uint8* tmp_buf = packet;
+ //Out() << "Got packet : " << len << " type = " << type << endl;
+ Uint8 type = tmp_buf[0];
+ switch (type)
+ {
+ case CHOKE:
+ if (len != 1)
+ {
+ Out() << "len err CHOKE" << endl;
+ kill();
+ return;
+ }
+
+ if (!choked)
+ {
+ time_choked = GetCurrentTime();
+ }
+ choked = true;
+ downloader->choked();
+ break;
+ case UNCHOKE:
+ if (len != 1)
+ {
+ Out() << "len err UNCHOKE" << endl;
+ kill();
+ return;
+ }
+
+ if (choked)
+ time_unchoked = GetCurrentTime();
+ choked = false;
+ break;
+ case INTERESTED:
+ if (len != 1)
+ {
+ Out() << "len err INTERESTED" << endl;
+ kill();
+ return;
+ }
+ if (!interested)
+ {
+ interested = true;
+ rerunChoker();
+ }
+ break;
+ case NOT_INTERESTED:
+ if (len != 1)
+ {
+ Out() << "len err NOT_INTERESTED" << endl;
+ kill();
+ return;
+ }
+ if (interested)
+ {
+ interested = false;
+ rerunChoker();
+ }
+ break;
+ case HAVE:
+ if (len != 5)
+ {
+ Out() << "len err HAVE" << endl;
+ kill();
+ }
+ else
+ {
+ Uint32 ch = ReadUint32(tmp_buf,1);
+ if (ch < pieces.getNumBits())
+ {
+ haveChunk(this,ch);
+ pieces.set(ch,true);
+ }
+ else
+ {
+ Out(SYS_CON|LOG_NOTICE) << "Received invalid have value, kicking peer" << endl;
+ kill();
+ }
+ }
+ break;
+ case BITFIELD:
+ if (len != 1 + pieces.getNumBytes())
+ {
+ Out() << "len err BITFIELD" << endl;
+ kill();
+ return;
+ }
+
+ pieces = BitSet(tmp_buf+1,pieces.getNumBits());
+ bitSetRecieved(pieces);
+ break;
+ case REQUEST:
+ if (len != 13)
+ {
+ Out() << "len err REQUEST" << endl;
+ kill();
+ return;
+ }
+
+ {
+ Request r(
+ ReadUint32(tmp_buf,1),
+ ReadUint32(tmp_buf,5),
+ ReadUint32(tmp_buf,9),
+ id);
+
+ if (!am_choked)
+ uploader->addRequest(r);
+ else if (stats.fast_extensions)
+ pwriter->sendReject(r);
+ // Out() << "REQUEST " << r.getIndex() << " " << r.getOffset() << endl;
+ }
+ break;
+ case PIECE:
+ if (len < 9)
+ {
+ Out() << "len err PIECE" << endl;
+ kill();
+ return;
+ }
+
+ snub_timer.update();
+
+ {
+ stats.bytes_downloaded += (len - 9);
+ // turn on evil bit
+ if (stats.evil)
+ stats.evil = false;
+ Piece p(ReadUint32(tmp_buf,1),
+ ReadUint32(tmp_buf,5),
+ len - 9,id,tmp_buf+9);
+ piece(p);
+ }
+ break;
+ case CANCEL:
+ if (len != 13)
+ {
+ Out() << "len err CANCEL" << endl;
+ kill();
+ return;
+ }
+
+ {
+ Request r(ReadUint32(tmp_buf,1),
+ ReadUint32(tmp_buf,5),
+ ReadUint32(tmp_buf,9),
+ id);
+ uploader->removeRequest(r);
+ }
+ break;
+ case REJECT_REQUEST:
+ if (len != 13)
+ {
+ Out() << "len err REJECT_REQUEST" << endl;
+ kill();
+ return;
+ }
+
+ {
+ Request r(ReadUint32(tmp_buf,1),
+ ReadUint32(tmp_buf,5),
+ ReadUint32(tmp_buf,9),
+ id);
+ downloader->onRejected(r);
+ }
+ break;
+ case PORT:
+ if (len != 3)
+ {
+ Out() << "len err PORT" << endl;
+ kill();
+ return;
+ }
+
+ {
+ Uint16 port = ReadUint16(tmp_buf,1);
+ // Out() << "Got PORT packet : " << port << endl;
+ gotPortPacket(getIPAddresss(),port);
+ }
+ break;
+ case HAVE_ALL:
+ if (len != 1)
+ {
+ Out() << "len err HAVE_ALL" << endl;
+ kill();
+ return;
+ }
+ pieces.setAll(true);
+ bitSetRecieved(pieces);
+ break;
+ case HAVE_NONE:
+ if (len != 1)
+ {
+ Out() << "len err HAVE_NONE" << endl;
+ kill();
+ return;
+ }
+ pieces.setAll(false);
+ bitSetRecieved(pieces);
+ break;
+ case SUGGEST_PIECE:
+ // ignore suggestions for the moment
+ break;
+ case ALLOWED_FAST:
+ // we no longer support this, so do nothing
+ break;
+ case EXTENDED:
+ handleExtendedPacket(packet,len);
+ break;
+ }
+ }
+
+ void Peer::handleExtendedPacket(const Uint8* packet,Uint32 size)
+ {
+ if (size <= 2 || packet[1] > 1)
+ return;
+
+ if (packet[1] == 1)
+ {
+ if (ut_pex)
+ ut_pex->handlePexPacket(packet,size);
+ return;
+ }
+
+ QByteArray tmp;
+ tmp.setRawData((const char*)packet,size);
+ BNode* node = 0;
+ try
+ {
+ BDecoder dec(tmp,false,2);
+ node = dec.decode();
+ if (node && node->getType() == BNode::DICT)
+ {
+ BDictNode* dict = (BDictNode*)node;
+
+ // handshake packet, so just check if the peer supports ut_pex
+ dict = dict->getDict("m");
+ BValueNode* val = 0;
+ if (dict && (val = dict->getValue("ut_pex")))
+ {
+ utorrent_pex_id = val->data().toInt();
+ if (ut_pex)
+ {
+ if (utorrent_pex_id > 0)
+ ut_pex->changeID(utorrent_pex_id);
+ else
+ {
+ // id 0 means disabled
+ delete ut_pex;
+ ut_pex = 0;
+ }
+ }
+ else if (!ut_pex && utorrent_pex_id != 0 && pex_allowed)
+ {
+ // Don't create it when the id is 0
+ ut_pex = new UTPex(this,utorrent_pex_id);
+ }
+ }
+ }
+ }
+ catch (...)
+ {
+ // just ignore invalid packets
+ Out(SYS_CON|LOG_DEBUG) << "Invalid extended packet" << endl;
+ }
+ delete node;
+ tmp.resetRawData((const char*)packet,size);
+ }
+
+ Uint32 Peer::sendData(const Uint8* data,Uint32 len)
+ {
+ if (killed) return 0;
+
+ Uint32 ret = sock->sendData(data,len);
+ if (!sock->ok())
+ kill();
+
+ return ret;
+ }
+
+ Uint32 Peer::readData(Uint8* buf,Uint32 len)
+ {
+ if (killed) return 0;
+
+ Uint32 ret = sock->readData(buf,len);
+
+ if (!sock->ok())
+ kill();
+
+ return ret;
+ }
+
+ Uint32 Peer::bytesAvailable() const
+ {
+ return sock->bytesAvailable();
+ }
+
+ void Peer::dataWritten(int )
+ {
+ // Out() << "dataWritten " << bytes << endl;
+
+ }
+
+ Uint32 Peer::getUploadRate() const
+ {
+ if (sock)
+ return (Uint32)ceil(sock->getUploadRate());
+ else
+ return 0;
+ }
+
+ Uint32 Peer::getDownloadRate() const
+ {
+ if (sock)
+ return (Uint32)ceil(sock->getDownloadRate());
+ else
+ return 0;
+ }
+
+ bool Peer::readyToSend() const
+ {
+ return true;
+ }
+
+ void Peer::update(PeerManager* pman)
+ {
+ if (killed)
+ return;
+
+ if (!sock->ok() || !preader->ok())
+ {
+ Out(SYS_CON|LOG_DEBUG) << "Connection closed" << endl;
+ kill();
+ return;
+ }
+
+ preader->update();
+
+ Uint32 data_bytes = pwriter->getUploadedDataBytes();
+
+ if (data_bytes > 0)
+ {
+ stats.bytes_uploaded += data_bytes;
+ uploader->addUploadedBytes(data_bytes);
+ }
+
+ if (ut_pex && ut_pex->needsUpdate())
+ ut_pex->update(pman);
+ }
+
+ bool Peer::isSnubbed() const
+ {
+ // 4 minutes
+ return snub_timer.getElapsedSinceUpdate() >= 2*60*1000 && stats.num_down_requests > 0;
+ }
+
+ bool Peer::isSeeder() const
+ {
+ return pieces.allOn();
+ }
+
+ QString Peer::getIPAddresss() const
+ {
+ if (sock)
+ return sock->getRemoteIPAddress();
+ else
+ return QString::null;
+ }
+
+ Uint16 Peer::getPort() const
+ {
+ if (!sock)
+ return 0;
+ else
+ return sock->getRemotePort();
+ }
+
+ net::Address Peer::getAddress() const
+ {
+ if (!sock)
+ return net::Address();
+ else
+ return sock->getRemoteAddress();
+ }
+
+ Uint32 Peer::getTimeSinceLastPiece() const
+ {
+ return snub_timer.getElapsedSinceUpdate();
+ }
+
+ float Peer::percentAvailable() const
+ {
+ return (float)pieces.numOnBits() / (float)pieces.getNumBits() * 100.0;
+ }
+
+ const kt::PeerInterface::Stats & Peer::getStats() const
+ {
+ stats.choked = this->isChoked();
+ stats.download_rate = this->getDownloadRate();
+ stats.upload_rate = this->getUploadRate();
+ stats.perc_of_file = this->percentAvailable();
+ stats.snubbed = this->isSnubbed();
+ stats.num_up_requests = uploader->getNumRequests();
+ stats.num_down_requests = downloader->getNumRequests();
+ return stats;
+ }
+
+ void Peer::setACAScore(double s)
+ {
+ stats.aca_score = s;
+ }
+
+ void Peer::choke()
+ {
+ if (am_choked)
+ return;
+
+ pwriter->sendChoke();
+ uploader->clearAllRequests();
+ }
+
+ void Peer::emitPortPacket()
+ {
+ gotPortPacket(sock->getRemoteIPAddress(),sock->getRemotePort());
+ }
+
+ void Peer::emitPex(const QByteArray & data)
+ {
+ pex(data);
+ }
+
+ void Peer::setPexEnabled(bool on)
+ {
+ if (!stats.extension_protocol)
+ return;
+
+ // send extension protocol handshake
+ bt::Uint16 port = Globals::instance().getServer().getPortInUse();
+
+ if (ut_pex && !on)
+ {
+ delete ut_pex;
+ ut_pex = 0;
+ }
+ else if (!ut_pex && on && utorrent_pex_id > 0)
+ {
+ // if the other side has enabled it to, create a new UTPex object
+ ut_pex = new UTPex(this,utorrent_pex_id);
+ }
+
+ pwriter->sendExtProtHandshake(port,on);
+
+ pex_allowed = on;
+ }
+
+ void Peer::setGroupIDs(Uint32 up_gid,Uint32 down_gid)
+ {
+ sock->setGroupIDs(up_gid,down_gid);
+ }
+}
+
+#include "peer.moc"
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