block = new PacketAckPacket.PacketsBlock();
block.ID = ack;
blocks.add(block);
}
PacketAckPacket packet = new PacketAckPacket();
packet.header.Reliable = false;
packet.Packets = blocks.toArray(new PacketAckPacket.PacketsBlock[0]);
ackCount = blocks.size();
SendPacket(packet);