public static byte[] PacketToByte(PacketBase packet)
{
using (var ms = new MemoryStream())
{
using (var bw = new BinaryWriter(ms))
{
packet.WriteTo(bw);
var packetInfo = PacketLengthManager.GetPacketInformation((PACKET_COMMAND)packet.Command);
if (packet.GetType().IsSubclassOf(typeof(PacketVarSize)))
{
((PacketVarSize)packet).SetLength(bw);
}
var send = ms.ToArray();
if (!IsPacketLengthSane(packet, ms))
{
if (packetInfo != null)
{
Logger.ErrorFormat("Client::Send() {0} (0x{1:X4}) wrong length {2} != {3}", ((PACKET_COMMAND)packet.Command), packet.Command, ms.Position, packetInfo);
}
else
{
Logger.ErrorFormat("Client::Send() {0} (0x{1:X4}) wrong length {2}", ((PACKET_COMMAND)packet.Command), packet.Command, ms.Position);
}
throw new ApplicationException();
}
return(send);
}
}
}
protected static bool IsPacketLengthSane(PacketBase packet, MemoryStream ms)
{
var info = PacketLengthManager.GetPacketInformation((PACKET_COMMAND)packet.Command);
// Packets must have type (ushort) and sequence number (uint)
if (ms.Length < 2)
{
return(false);
}
if (info.HasValue && ms.Length != info.Value)
{
return(false);
}
if (!info.HasValue)
{
var lenPos = 0;
if (packet.GetType().IsSubclassOf(typeof(PacketVarSize)))
{
lenPos = 2;
}
// Variable length packets must additioanlly have a length attribute (ushort)
if (ms.Length < lenPos + 2)
{
return(false);
}
var offset = ms.Position;
ms.Seek(lenPos, SeekOrigin.Begin);
var size = ms.ReadByte() | (ms.ReadByte() << 8);
ms.Seek(offset, SeekOrigin.Begin);
if (size != ms.Length)
{
return(false);
}
}
return(true);
}
