public void Update()
{
byte[] buffer = new byte [1024];
while (socket.Available > 0)
{
try
{
EndPoint endpoint = new IPEndPoint(IPAddress.Any, 0);
int length = socket.ReceiveFrom(buffer, ref endpoint);
if (length > buffer.Length)
{
continue;
}
if (length < HeaderSize)
{
continue;
}
int magic = BitConv.FromInt32(buffer, 0);
PacketType type = (PacketType)buffer[4];
if (magic != Magic)
{
continue;
}
byte[] data = new byte [length - HeaderSize];
Array.Copy(buffer, HeaderSize, data, 0, data.Length);
ReceivePacket(endpoint, type, data);
}
catch (SocketException)
{
// TODO :: Log exception
}
}
}
public WadArchive(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (stream.Length < 16)
{
throw new ApplicationException();
}
byte[] buffer = new byte [16];
stream.Read(buffer, 0, 12);
string magic = Encoding.ASCII.GetString(buffer, 0, 4);
int lumpcount = BitConv.FromInt32(buffer, 4);
int diroffset = BitConv.FromInt32(buffer, 8);
if (magic != "IWAD" && magic != "PWAD")
{
throw new ApplicationException();
}
if (lumpcount < 0)
{
throw new ApplicationException();
}
if (diroffset < 0)
{
throw new ApplicationException();
}
if (stream.Length < diroffset + lumpcount * 16)
{
throw new ApplicationException();
}
lumps = new List <ILump>(lumpcount);
stream.Position = diroffset;
for (int i = 0; i < lumpcount; i++)
{
stream.Read(buffer, 0, 16);
int offset = BitConv.FromInt32(buffer, 0);
int length = BitConv.FromInt32(buffer, 4);
string name = Encoding.ASCII.GetString(buffer, 8, 8);
if (name.Contains("\0"))
{
name = name.Remove(name.IndexOf('\0'));
}
name = name.ToUpper();
if (offset < 0)
{
throw new ApplicationException();
}
if (length < 0)
{
throw new ApplicationException();
}
if (stream.Length < offset + length)
{
throw new ApplicationException();
}
lumps.Add(new StreamLump(stream, name, length, offset));
}
}
private void HandleGamePacket(object sender, PacketEventArgs e)
{
INetNode node = (INetNode)sender;
if (e.Type == PacketType.Connect)
{
if (e.Data.Length != 0)
{
return;
}
byte[] data = new byte [8];
BitConv.ToInt32(data, 0, nodes.IndexOf(node));
BitConv.ToInt32(data, 4, nodes.Count);
node.SendPacket(PacketType.Accepted, data);
}
else if (e.Type == PacketType.DoomData)
{
if (e.Data.Length < 4)
{
return;
}
int nodeid = BitConv.FromInt32(e.Data, 0);
if (nodeid < 0 || nodeid >= nodes.Count)
{
return;
}
byte[] data = new byte [e.Data.Length];
BitConv.ToInt32(data, 0, nodes.IndexOf(node));
Array.Copy(e.Data, 4, data, 4, e.Data.Length - 4);
nodes[nodeid].SendPacket(PacketType.DoomData, data);
}
}
public MusicTrack(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Length < 16)
{
throw new ApplicationException();
}
int magic = BitConv.FromInt32(data, 0);
int scorelength = (ushort)BitConv.FromInt16(data, 4);
int scorestart = (ushort)BitConv.FromInt16(data, 6);
int channels = (ushort)BitConv.FromInt16(data, 8);
int secchannels = (ushort)BitConv.FromInt16(data, 10);
int instrumentcount = (ushort)BitConv.FromInt16(data, 12);
int unused = (ushort)BitConv.FromInt16(data, 14);
if (magic != Magic)
{
throw new ApplicationException();
}
if (scorestart < 16)
{
throw new ApplicationException();
}
if (scorelength <= 0)
{
throw new ApplicationException();
}
if (scorestart + scorelength != data.Length)
{
throw new ApplicationException();
}
if (scorestart < 16 + instrumentcount * 2)
{
throw new ApplicationException();
}
instruments = new short [instrumentcount];
for (int i = 0; i < instrumentcount; i++)
{
instruments[i] = BitConv.FromInt16(data, 16 + i * 2);
}
score = new List <MusicEvent>();
int offset = scorestart;
while (offset != data.Length)
{
score.Add(MusicEvent.Parse(data, ref offset));
}
}