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/* <!-- copyright */
/*
* aria2 - a simple utility for downloading files faster
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* copyright --> */
#include "PieceMessage.h"
#include "PeerMessageUtil.h"
#include "PeerInteraction.h"
#include "Util.h"
#include "message.h"
#include "DlAbortEx.h"
void PieceMessage::setBlock(const char* block, int blockLength) {
if(this->block != NULL) {
delete [] this->block;
}
this->blockLength = blockLength;
this->block = new char[this->blockLength];
memcpy(this->block, block, this->blockLength);
}
PieceMessage* PieceMessage::create(const char* data, int dataLength) {
if(dataLength <= 9) {
throw new DlAbortEx("invalid payload size for %s, size = %d. It should be greater than %d", "piece", dataLength, 9);
}
int id = PeerMessageUtil::getId(data);
if(id != ID) {
throw new DlAbortEx("invalid ID=%d for %s. It should be %d.",
id, "piece", ID);
}
PieceMessage* pieceMessage = new PieceMessage();
pieceMessage->setIndex(PeerMessageUtil::getIntParam(data, 1));
pieceMessage->setBegin(PeerMessageUtil::getIntParam(data, 5));
pieceMessage->setBlock(data+9, dataLength-9);
return pieceMessage;
}
void PieceMessage::receivedAction() {
TorrentMan* torrentMan = peerInteraction->getTorrentMan();
RequestSlot slot = peerInteraction->getCorrespondingRequestSlot(index,
begin,
blockLength);
peer->addPeerUpload(blockLength);
if(!RequestSlot::isNull(slot) &&
peerInteraction->hasDownloadPiece(slot.getIndex())) {
peer->snubbing = false;
//logger->debug("CUID#%d - Latency=%d", cuid, slot.getLatencyInMillis());
peer->updateLatency(slot.getLatencyInMillis());
Piece& piece = peerInteraction->getDownloadPiece(slot.getIndex());
long long int offset =
((long long int)index)*torrentMan->pieceLength+begin;
logger->debug("CUID#%d - Writing the block length=%d, offset=%lld",
cuid, blockLength, offset);
torrentMan->diskAdaptor->writeData(block,
blockLength,
offset);
piece.completeBlock(slot.getBlockIndex());
peerInteraction->deleteRequestSlot(slot);
torrentMan->updatePiece(piece);
logger->debug("CUID#%d - Setting piece block index=%d",
cuid, slot.getBlockIndex());
torrentMan->addDeltaDownloadLength(blockLength);
if(piece.pieceComplete()) {
if(checkPieceHash(piece)) {
onGotNewPiece(piece);
} else {
onGotWrongPiece(piece);
}
}
}
}
const char* PieceMessage::getMessageHeader() {
if(!inProgress) {
/**
* len --- 9+blockLength, 4bytes
* id --- 7, 1byte
* index --- index, 4bytes
* begin --- begin, 4bytes
* total: 13bytes
*/
PeerMessageUtil::createPeerMessageString(msgHeader, sizeof(msgHeader),
9+blockLength, ID);
PeerMessageUtil::setIntParam(&msgHeader[5], index);
PeerMessageUtil::setIntParam(&msgHeader[9], begin);
}
return msgHeader;
}
int PieceMessage::getMessageHeaderLength() {
return sizeof(msgHeader);
}
void PieceMessage::send() {
TorrentMan* torrentMan = peerInteraction->getTorrentMan();
PeerConnection* peerConnection = peerInteraction->getPeerConnection();
if(!headerSent) {
if(!inProgress) {
logger->info(MSG_SEND_PEER_MESSAGE,
cuid, peer->ipaddr.c_str(), peer->port,
toString().c_str());
getMessageHeader();
leftDataLength = getMessageHeaderLength();
inProgress = true;
}
int writtenLength
= peerConnection->sendMessage(msgHeader+getMessageHeaderLength()-leftDataLength,
leftDataLength);
if(writtenLength == leftDataLength) {
headerSent = true;
leftDataLength = blockLength;
} else {
leftDataLength -= writtenLength;
}
}
if(headerSent) {
inProgress = false;
int pieceLength = torrentMan->pieceLength;
long long int pieceDataOffset =
((long long int)index)*pieceLength+begin+blockLength-leftDataLength;
int writtenLength =
sendPieceData(pieceDataOffset, leftDataLength);
peer->addPeerDownload(writtenLength);
torrentMan->addUploadLength(writtenLength);
torrentMan->addDeltaUploadLength(writtenLength);
if(writtenLength != leftDataLength) {
inProgress = true;
}
leftDataLength -= writtenLength;
}
}
int PieceMessage::sendPieceData(long long int offset, int length) const {
int BUF_SIZE = 256;
char buf[BUF_SIZE];
int iteration = length/BUF_SIZE;
int writtenLength = 0;
TorrentMan* torrentMan = peerInteraction->getTorrentMan();
PeerConnection* peerConnection = peerInteraction->getPeerConnection();
for(int i = 0; i < iteration; i++) {
if(torrentMan->diskAdaptor->readData(buf, BUF_SIZE, offset+i*BUF_SIZE) < BUF_SIZE) {
throw new DlAbortEx("Failed to read data from disk.");
}
int ws = peerConnection->sendMessage(buf, BUF_SIZE);
writtenLength += ws;
if(ws != BUF_SIZE) {
//logger->debug("CUID#%d - %d bytes written", cuid, writtenLength);
return writtenLength;
}
}
int rem = length%BUF_SIZE;
if(rem > 0) {
if(torrentMan->diskAdaptor->readData(buf, rem, offset+iteration*BUF_SIZE) < rem) {
throw new DlAbortEx("Failed to read data from disk.");
}
int ws = peerConnection->sendMessage(buf, rem);
writtenLength += ws;
}
//logger->debug("CUID#%d - %d bytes written", cuid, writtenLength);
return writtenLength;
}
void PieceMessage::check() const {
PeerMessageUtil::checkIndex(index, pieces);
PeerMessageUtil::checkBegin(begin, pieceLength);
}
string PieceMessage::toString() const {
return "piece index="+Util::itos(index)+", begin="+Util::itos(begin)+
", length="+Util::itos(blockLength);
}
bool PieceMessage::checkPieceHash(const Piece& piece) {
TorrentMan* torrentMan = peerInteraction->getTorrentMan();
long long int offset =
((long long int)piece.getIndex())*torrentMan->pieceLength;
return torrentMan->diskAdaptor->sha1Sum(offset, piece.getLength()) ==
torrentMan->getPieceHash(piece.getIndex());
}
void PieceMessage::onGotNewPiece(Piece& piece) {
TorrentMan* torrentMan = peerInteraction->getTorrentMan();
logger->info(MSG_GOT_NEW_PIECE, cuid, piece.getIndex());
torrentMan->completePiece(piece);
torrentMan->advertisePiece(cuid, piece.getIndex());
}
void PieceMessage::onGotWrongPiece(Piece& piece) {
TorrentMan* torrentMan = peerInteraction->getTorrentMan();
logger->error(MSG_GOT_WRONG_PIECE, cuid, piece.getIndex());
erasePieceOnDisk(piece);
piece.clearAllBlock();
torrentMan->updatePiece(piece);
}
void PieceMessage::erasePieceOnDisk(const Piece& piece) {
TorrentMan* torrentMan = peerInteraction->getTorrentMan();
int BUFSIZE = 4096;
char buf[BUFSIZE];
memset(buf, 0, BUFSIZE);
long long int offset = ((long long int)piece.getIndex())*torrentMan->pieceLength;
for(int i = 0; i < piece.getLength()/BUFSIZE; i++) {
torrentMan->diskAdaptor->writeData(buf, BUFSIZE, offset);
offset += BUFSIZE;
}
int r = piece.getLength()%BUFSIZE;
if(r > 0) {
torrentMan->diskAdaptor->writeData(buf, r, offset);
}
}
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