public void Incoming(Bitstream.Buffer stream)
{
byte seq = (byte)Bitstream.ReadBits(stream, 8);
if (stream.error != 0)
{
Error("Broken packet");
return;
}
byte diff = (byte)(seq - _recvTail);
if (diff > 200)
{
// too old.
return;
}
else
{
// update head if newer.
byte newHead = (byte)(seq + 1);
diff = (byte)(newHead - _recvHead);
if (diff < 100)
_recvHead = newHead;
}
Bitstream.SyncByte(stream);
Bitstream.Copy(_recv[seq], stream);
}
public void Send(Bitstream.Buffer stream)
{
Bitstream.Buffer buf = Bitstream.Buffer.Make(new byte[stream.bufsize + 8]);
Bitstream.PutBits(buf, 8, _sendPos++);
Bitstream.Insert(buf, stream);
buf.Flip();
_send.Add(buf);
}
public void Incoming(Bitstream.Buffer stream)
{
// read ack numbers
while (true)
{
uint hasAck = Bitstream.ReadBits(stream, 1);
if (hasAck == 0 || stream.error != 0)
break;
byte idx = (byte)Bitstream.ReadBits(stream, 8);
if (stream.error != 0)
{
Error("Broken packet");
return;
}
// free up the slot.
_sent[idx].buf = null;
}
if (stream.BitsLeft() < 8)
return;
byte seq = (byte)Bitstream.ReadBits(stream, 8);
if (stream.error != 0)
{
Error("Broken packet");
return;
}
// add to ack list.
if ((byte)(_ackOutHead + 1) == _ackOutTail)
Error("AckOut is full");
else
_ackOut[_ackOutHead++] = seq;
byte diff = (byte)(seq - _recvPos);
if (diff > 128)
// old packet, thorw.
return;
if (_recv[seq].buf == null)
_recvPending++;
Bitstream.SyncByte(stream);
Bitstream.Copy(_recv[seq], stream);
}
public void Send(Bitstream.Buffer stream)
{
if (_sent[_sendHead].buf != null)
Error("Send queue full!");
_sendTimer[_sendHead] = 0.0f;
Bitstream.Copy(_sent[_sendHead++], stream);
}
public void WrapOut(Bitstream.Buffer dest, Bitstream.Buffer src, byte seq)
{
// Format in all the ack outs.
while (_ackOutTail != _ackOutHead)
{
Bitstream.PutBits(dest, 1, 1);
Bitstream.PutBits(dest, 8, _ackOut[_ackOutTail]);
_ackOutTail++;
}
Bitstream.PutBits(dest, 1, 0);
if (src != null)
{
int bytepos = src.bytepos;
int bitpos = src.bitpos;
Bitstream.PutBits(dest, 8, seq);
// byte align where actual data is
Bitstream.SyncByte(dest);
Bitstream.Insert(dest, src);
src.bytepos = bytepos;
src.bitpos = bitpos;
}
}
