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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. *
***************************************************************************/
//#define LOG_PACKET
#ifdef LOG_PACKET
#include <sys/types.h>
#include <unistd.h>
#endif
#include <util/log.h>
#include <util/file.h>
#include <util/functions.h>
#include "packetreader.h"
#include "peer.h"
namespace bt
{
#ifdef LOG_PACKET
static void LogPacket(const Uint8* data,Uint32 size,Uint32 len)
{
TQString file = TQString("/tmp/kt-packetreader-%1.log").tqarg(getpid());
File fptr;
if (!fptr.open(file,"a"))
return;
TQString tmp = TQString("PACKET len = %1, type = %2\nDATA: \n").tqarg(len).tqarg(data[0]);
fptr.write(tmp.ascii(),tmp.length());
Uint32 j = 0;
if (size <= 40)
{
for (Uint32 i = 0;i < size;i++)
{
tmp = TQString("0x%1 ").tqarg(data[i],0,16);
fptr.write(tmp.ascii(),tmp.length());
j++;
if (j > 10)
{
fptr.write("\n",1);
j = 0;
}
}
}
else
{
for (Uint32 i = 0;i < 20;i++)
{
tmp = TQString("0x%1 ").tqarg(data[i],0,16);
fptr.write(tmp.ascii(),tmp.length());
j++;
if (j > 10)
{
fptr.write("\n",1);
j = 0;
}
}
tmp = TQString("\n ... \n");
fptr.write(tmp.ascii(),tmp.length());
for (Uint32 i = size - 20;i < size;i++)
{
tmp = TQString("0x%1 ").tqarg(data[i],0,16);
fptr.write(tmp.ascii(),tmp.length());
j++;
if (j > 10)
{
fptr.write("\n",1);
j = 0;
}
}
}
fptr.write("\n",1);
}
#endif
IncomingPacket::IncomingPacket(Uint32 size) : data(0),size(size),read(0)
{
data = new Uint8[size];
}
IncomingPacket::~IncomingPacket()
{
delete [] data;
}
PacketReader::PacketReader(Peer* peer)
: peer(peer),error(false)
{
packet_queue.setAutoDelete(true);
len_received = -1;
}
PacketReader::~PacketReader()
{
}
void PacketReader::update()
{
if (error)
return;
mutex.lock();
// pass packets to peer
while (packet_queue.count() > 0)
{
IncomingPacket* pck = packet_queue.first();
if (pck->read == pck->size)
{
// full packet is read pass it to peer
peer->packetReady(pck->data,pck->size);
packet_queue.removeFirst();
}
else
{
// packet is not yet full, break out of loop
break;
}
}
mutex.unlock();
}
Uint32 PacketReader::newPacket(Uint8* buf,Uint32 size)
{
Uint32 packet_length = 0;
Uint32 am_of_len_read = 0;
if (len_received > 0)
{
if (size < 4 - len_received)
{
memcpy(len + len_received,buf,size);
len_received += size;
return size;
}
else
{
memcpy(len + len_received,buf,4 - len_received);
am_of_len_read = 4 - len_received;
len_received = 0;
packet_length = ReadUint32(len,0);
}
}
else if (size < 4)
{
memcpy(len,buf,size);
len_received = size;
return size;
}
else
{
packet_length = ReadUint32(buf,0);
am_of_len_read = 4;
}
if (packet_length == 0)
return am_of_len_read;
if (packet_length > MAX_PIECE_LEN + 13)
{
Out(SYS_CON|LOG_DEBUG) << " packet_length too large " << packet_length << endl;
error = true;
return size;
}
IncomingPacket* pck = new IncomingPacket(packet_length);
packet_queue.append(pck);
return am_of_len_read + readPacket(buf + am_of_len_read,size - am_of_len_read);
}
Uint32 PacketReader::readPacket(Uint8* buf,Uint32 size)
{
if (!size)
return 0;
IncomingPacket* pck = packet_queue.last();
if (pck->read + size >= pck->size)
{
// we can read the full packet
Uint32 tr = pck->size - pck->read;
memcpy(pck->data + pck->read,buf,tr);
pck->read += tr;
return tr;
}
else
{
// we can do a partial read
Uint32 tr = size;
memcpy(pck->data + pck->read,buf,tr);
pck->read += tr;
return tr;
}
}
void PacketReader::onDataReady(Uint8* buf,Uint32 size)
{
if (error)
return;
mutex.lock();
if (packet_queue.count() == 0)
{
Uint32 ret = 0;
while (ret < size && !error)
{
ret += newPacket(buf + ret,size - ret);
}
}
else
{
Uint32 ret = 0;
IncomingPacket* pck = packet_queue.last();
if (pck->read == pck->size) // last packet in queue is fully read
ret = newPacket(buf,size);
else
ret = readPacket(buf,size);
while (ret < size && !error)
{
ret += newPacket(buf + ret,size - ret);
}
}
mutex.unlock();
}
}
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