void ChunkDownload::notDownloaded(const Request & r,bool reject)
{
// find the peer
DownloadStatus* ds = dstatus.find(r.getPeer());
if (ds)
{
// Out() << "ds != 0" << endl;
Uint32 p = r.getOffset() / MAX_PIECE_LEN;
ds->remove(p);
}
// go over all PD's and do requets again
for (QPtrList<PeerDownloader>::iterator i = pdown.begin();i != pdown.end();++i)
sendRequests(*i);
}
void ChunkDownload::endgameCancel(const Piece & p)
{
QPtrList<PeerDownloader>::iterator i = pdown.begin();
while (i != pdown.end())
{
PeerDownloader* pd = *i;
DownloadStatus* ds = dstatus.find(pd->getPeer()->getID());
Uint32 pp = p.getOffset() / MAX_PIECE_LEN;
if (ds && ds->contains(pp))
{
pd->cancel(Request(p));
ds->remove(pp);
}
i++;
}
}
bool ChunkDownload::piece(const Piece & p,bool & ok)
{
ok = false;
timer.update();
Uint32 pp = p.getOffset() / MAX_PIECE_LEN;
Uint32 len = pp == num - 1 ? last_size : MAX_PIECE_LEN;
if (pp >= num || pieces.get(pp) || p.getLength() != len)
return false;
DownloadStatus* ds = dstatus.find(p.getPieceDownloader());
if (ds)
ds->remove(pp);
PieceData::Ptr buf = chunk->getPiece(p.getOffset(),p.getLength(),false);
if (buf && buf->write(p.getData(),p.getLength()) == p.getLength())
{
piece_data[pp] = buf;
ok = true;
pieces.set(pp,true);
piece_providers.insert(p.getPieceDownloader());
num_downloaded++;
if (pdown.count() > 1)
{
endgameCancel(p);
}
updateHash();
if (num_downloaded >= num)
{
// finalize hash
hash_gen.end();
releaseAllPDs();
return true;
}
}
sendRequests();
return false;
}
void ChunkDownload::sendCancels(PeerDownloader* pd)
{
DownloadStatus* ds = dstatus.find(pd->getPeer()->getID());
if (!ds)
return;
DownloadStatus::iterator itr = ds->begin();
while (itr != ds->end())
{
Uint32 i = *itr;
pd->cancel(
Request(
chunk->getIndex(),
i*MAX_PIECE_LEN,
i+1<num ? MAX_PIECE_LEN : last_size,0));
itr++;
}
ds->clear();
timer.update();
}
void ChunkDownload::sendRequests(PeerDownloader* pd)
{
timer.update();
DownloadStatus* ds = dstatus.find(pd->getPeer()->getID());
if (!ds)
return;
// if the peer is choked and we are not downloading an allowed fast chunk
if (pd->isChoked())
return;
Uint32 num_visited = 0;
while (num_visited < piece_queue.count() && pd->canAddRequest())
{
// get the first one in the queue
Uint32 i = piece_queue.first();
if (!ds->contains(i))
{
// send request
pd->download(
Request(
chunk->getIndex(),
i*MAX_PIECE_LEN,
i+1<num ? MAX_PIECE_LEN : last_size,
pd->getPeer()->getID()));
ds->add(i);
}
// move to the back so that it will take a while before it's turn is up
piece_queue.pop_front();
piece_queue.append(i);
num_visited++;
}
if (piece_queue.count() < 2 && piece_queue.count() > 0)
pd->setNearlyDone(true);
}
