/// <summary>
/// Request the ping from the server (pingReceived will be triggered if it receives it)
///
/// This is not a reliable call
/// </summary>
public override void Ping()
{
BMSByte payload = new BMSByte();
long ticks = DateTime.UtcNow.Ticks;
payload.BlockCopy <long>(ticks, sizeof(long));
Ping pingFrame = new Ping(Time.Timestep, false, payload, Receivers.Server, MessageGroupIds.PING, false);
Send(pingFrame);
}
/// <summary>
/// Collect all of the data from all of the packets in this sequence and return it
/// </summary>
/// <returns>The complete packet sequence data</returns>
public BMSByte GetData()
{
data.Clear();
for (int i = 0; i < End; i++)
{
data.BlockCopy(packets[i].rawBytes, 0, packets[i].rawBytes.Length);
}
return(data);
}
/// <summary>
/// Gets the bytes for the Instance of an Object and appends them to a <c>BMSByte</c>.
/// </summary>
/// <param name="o">The Instance of the Object.</param>
/// <param name="type">The Type of the Object.</param>
/// <param name="bytes"><c>BMSByte</c> to which the bytes should be added.</param>
protected virtual void GetBytes(object o, Type type, ref BMSByte bytes)
{
if (type == typeof(string))
{
var strBytes = Encoding.UTF8.GetBytes(o == null ? string.Empty : (string)o);
// TODO: Need to make custom string serialization to binary
bytes.Append(BitConverter.GetBytes(strBytes.Length));
if (strBytes.Length > 0)
{
bytes.Append(strBytes);
}
}
else if (type == typeof(Vector))
{
Vector vec = (Vector)o;
bytes.Append(BitConverter.GetBytes(vec.x));
bytes.Append(BitConverter.GetBytes(vec.y));
bytes.Append(BitConverter.GetBytes(vec.z));
}
else if (type == null) //TODO: Check if this causes other issues
{
bytes.Append(new byte[1] {
0
});
}
else if (type == typeof(sbyte))
{
bytes.BlockCopy <sbyte>(o, 1);
}
else if (type == typeof(byte))
{
bytes.BlockCopy <byte>(o, 1);
}
else if (type == typeof(char))
{
bytes.BlockCopy <char>(o, 1);
}
else if (type == typeof(bool))
{
bytes.Append(BitConverter.GetBytes((bool)o));
}
else if (type == typeof(short))
{
bytes.Append(BitConverter.GetBytes((short)o));
}
else if (type == typeof(ushort))
{
bytes.Append(BitConverter.GetBytes((ushort)o));
}
else if (type == typeof(int))
{
bytes.Append(BitConverter.GetBytes((int)o));
}
else if (type == typeof(uint))
{
bytes.Append(BitConverter.GetBytes((uint)o));
}
else if (type == typeof(long))
{
bytes.Append(BitConverter.GetBytes((long)o));
}
else if (type == typeof(ulong))
{
bytes.Append(BitConverter.GetBytes((ulong)o));
}
else if (type == typeof(float))
{
bytes.Append(BitConverter.GetBytes((float)o));
}
else if (type == typeof(double))
{
bytes.Append(BitConverter.GetBytes((double)o));
}
else if (type.IsArray)
{
int rank = type.GetArrayRank();
Type targetType = type.GetElementType();
if (targetType != typeof(byte))
{
throw new Exception("Currently only byte arrays can be sent as arrays");
}
if (rank > 4)
{
throw new Exception("Currently the system only supports up to 4 dimensions in an array");
}
int i, j, k, l;
// Write each dimension length first
int[] lengths = new int[rank];
for (i = 0; i < rank; i++)
{
lengths[i] = ((Array)o).GetLength(i);
bytes.Append(BitConverter.GetBytes(lengths[i]));
}
switch (rank)
{
case 1:
for (i = 0; i < lengths[0]; i++)
{
GetBytes(((Array)o).GetValue(i), targetType, ref bytes);
}
break;
case 2:
for (i = 0; i < lengths[0]; i++)
{
for (j = 0; j < lengths[1]; j++)
{
GetBytes(((Array)o).GetValue(i, j), targetType, ref bytes);
}
}
break;
case 3:
for (i = 0; i < lengths[0]; i++)
{
for (j = 0; j < lengths[1]; j++)
{
for (k = 0; k < lengths[2]; k++)
{
GetBytes(((Array)o).GetValue(i, j, k), targetType, ref bytes);
}
}
}
break;
case 4:
for (i = 0; i < lengths[0]; i++)
{
for (j = 0; j < lengths[1]; j++)
{
for (k = 0; k < lengths[2]; k++)
{
for (l = 0; l < lengths[3]; l++)
{
GetBytes(((Array)o).GetValue(i, j, k, l), targetType, ref bytes);
}
}
}
}
break;
}
}
else if (type == typeof(BMSByte))
{
bytes.Append(BitConverter.GetBytes(((BMSByte)o).Size));
bytes.BlockCopy(((BMSByte)o).byteArr, ((BMSByte)o).StartIndex(), ((BMSByte)o).Size);
}
else if (type.IsEnum)
{
GetBytes(o, Enum.GetUnderlyingType(type), ref bytes);
}
else
{
// TODO: Make this a more appropriate exception
throw new BaseNetworkException("The type " + type.ToString() + " is not allowed to be sent over the Network (yet)");
}
}
/// <summary>
/// Creates the frame data using the passed in payload
/// </summary>
private void CreateFrame(bool useMask, ulong timestep, byte[] payload, Receivers receivers, int groupId, byte routerId, bool isStream)
{
// If we are to use a mask then generate a random mask
if (useMask)
{
mask = new byte[4];
new Random().NextBytes(mask);
}
StreamData = new BMSByte();
TimeStep = timestep;
GroupId = groupId;
RouterId = routerId;
Receivers = receivers;
UniqueId = UniqueMessageIdCounter++;
// Generate the frame identity
byte[] frame = new byte[10];
// The first byte of the data is always the control byte, which dictates the message type
frame[0] = ControlByte;
int length = payload.Length;
if (isStream)
{
length += 21; // Group id (4), receivers (1), time step (8), unique id (8)
}
else
{
length += 16; // time step (8), unique id (8)
}
if (frame[0] == Binary.CONTROL_BYTE)
{
length += 1;
}
// Determine the length of the payload
int dataStartIndex = 0;
if (length <= 125)
{
frame[1] = (byte)(useMask ? length | 128 : length);
dataStartIndex = 2;
}
else if (length >= 126 && length <= 65535)
{
dataStartIndex = 4;
frame[1] = (byte)(useMask ? 254 : 126);
}
else
{
dataStartIndex = 10;
frame[1] = (byte)(useMask ? 255 : 127);
}
// If the payload is greater than a byte (255) then set the order of the bytes for the length
if (dataStartIndex > 2)
{
int i = 0, j = 2, largestBitIndex = (dataStartIndex - 3) * 8;
// Little endian / Big endian reversal based on mask
//if (mask.Length == 0)
//{
for (i = largestBitIndex; i >= 0; i -= 8)
{
frame[j++] = (byte)((((long)length) >> i) & 255);
}
//} else
//{
// for (i = 0; i <= largestBitIndex; i += 8)
// frame[j++] = (byte)((payload.Length >> i) & 255);
//}
}
// Prepare the stream data with the size so that it doesn't have to keep resizing
StreamData.SetSize(dataStartIndex + mask.Length + length);
StreamData.Clear();
// Add the frame bytes
StreamData.BlockCopy(frame, 0, dataStartIndex);
// Add the mask bytes
StreamData.BlockCopy(mask, 0, mask.Length);
// Setup the int that tracks where the payload begins
payloadStart = dataStartIndex + mask.Length;
// If we are on a stream then use groupId
if (isStream)
{
StreamData.BlockCopy(BitConverter.GetBytes(groupId), 0, sizeof(int));
payloadStart += sizeof(int);
}
// Copy the routerId if this is a binary frame
if (frame[0] == Binary.CONTROL_BYTE)
{
StreamData.BlockCopy(new byte[1] {
routerId
}, 0, sizeof(byte));
payloadStart += 1;
}
// Add the initial payload bytes
StreamData.BlockCopy(payload, 0, payload.Length);
if (isStream)
{
StreamData.BlockCopy(new byte[1] {
(byte)Receivers
}, 0, sizeof(byte));
}
// Add the time step to the end of the frame
StreamData.BlockCopy <ulong>(TimeStep, sizeof(ulong));
// Add the unique message id for this frame just before the timestep frame
StreamData.BlockCopy <ulong>(UniqueId, sizeof(ulong));
if (mask.Length > 0)
{
for (int i = dataStartIndex + mask.Length, j = 0; i < StreamData.Size; i++, j++)
{
StreamData.byteArr[i] = (byte)(StreamData.byteArr[i] ^ mask[j % 4]);
}
}
}
