public static LargeDataPacket Decode(G2Header root)
{
LargeDataPacket packet = new LargeDataPacket(root.Name, 0, null);
// size packet
G2Header child = new G2Header(root.Data);
while (G2Protocol.ReadNextChild(root, child) == G2ReadResult.PACKET_GOOD)
{
if (!G2Protocol.ReadPayload(child))
{
continue;
}
if (child.Name == Packet_Size)
{
packet.Size = BitConverter.ToInt32(child.Data, child.PayloadPos);
}
if (child.Name == Packet_Hash)
{
packet.Hash = Utilities.ExtractBytes(child.Data, child.PayloadPos, child.PayloadSize);
}
}
return(packet);
}
public static byte[] Read(LargeDataPacket start, PacketStream stream, byte name)
{
byte[] data = new byte[start.Size];
int pos = 0;
G2Header root = null;
while (stream.ReadPacket(ref root))
{
if (root.Name == name)
{
if (!LargeDataPacket.Decode(root, data, ref pos))
{
break;
}
// done, break
if (pos == start.Size)
{
break;
}
}
// unknown packet, break
else
{
break;
}
}
if (start != null && data != null)
{
if (Utilities.MemCompare(start.Hash, new SHA1Managed().ComputeHash(data)))
{
return(data);
}
}
return(null);
}
