/// <summary>
/// Default constructor
/// </summary>
/// <param name="parent">
/// Parent bucket if this is a child bucket, or
/// null if this is a root bucket
/// </param>
/// <param name="maxBurst">
/// Maximum size of the bucket in bytes, or
/// zero if this bucket has no maximum capacity
/// </param>
/// <param name="dripRate">
/// Rate that the bucket fills, in bytes per
/// second. If zero, the bucket always remains full
/// </param>
public TokenBucket(TokenBucket parent, int maxBurst, int dripRate)
{
this.parent = parent;
MaxBurst = maxBurst;
DripRate = dripRate;
lastDrip = Environment.TickCount & Int32.MaxValue;
}
/// <summary>
/// Default constructor
/// </summary>
/// <param name="server">Reference to the UDP server this client is connected to</param>
/// <param name="rates">Default throttling rates and maximum throttle limits</param>
/// <param name="parentThrottle">
/// Parent HTB (hierarchical token bucket)
/// that the child throttles will be governed by
/// </param>
/// <param name="circuitCode">Circuit code for this connection</param>
/// <param name="agentID">AgentID for the connected agent</param>
/// <param name="remoteEndPoint">Remote endpoint for this connection</param>
/// <param name="defaultRTO"></param>
/// <param name="maxRTO"></param>
public LLUDPClient(LLUDPServer server, ThrottleRates rates, TokenBucket parentThrottle, uint circuitCode,
UUID agentID, IPEndPoint remoteEndPoint, int defaultRTO, int maxRTO)
{
AgentID = agentID;
RemoteEndPoint = remoteEndPoint;
CircuitCode = circuitCode;
m_udpServer = server;
if (defaultRTO != 0)
{
m_defaultRTO = defaultRTO;
}
if (maxRTO != 0)
{
m_maxRTO = maxRTO;
}
// Create a token bucket throttle for this client that has the scene token bucket as a parent
m_throttle = new TokenBucket(parentThrottle, rates.TotalLimit, 0);
// remember the rates the client requested
Rates = new int[(int)ThrottleOutPacketType.Count];
for (int i = 0; i < (int)ThrottleOutPacketType.Count; i++)
{
PacketsCounts[i] = 0;
}
//Set the priorities for the different packet types
//Higher is more important
MapCatsToPriority[(int)ThrottleOutPacketType.Resend] = 7;
MapCatsToPriority[(int)ThrottleOutPacketType.Land] = 1;
MapCatsToPriority[(int)ThrottleOutPacketType.Wind] = 0;
MapCatsToPriority[(int)ThrottleOutPacketType.Cloud] = 0;
MapCatsToPriority[(int)ThrottleOutPacketType.Task] = 4;
MapCatsToPriority[(int)ThrottleOutPacketType.Texture] = 2;
MapCatsToPriority[(int)ThrottleOutPacketType.Asset] = 3;
MapCatsToPriority[(int)ThrottleOutPacketType.Transfer] = 5;
MapCatsToPriority[(int)ThrottleOutPacketType.State] = 5;
MapCatsToPriority[(int)ThrottleOutPacketType.AvatarInfo] = 6;
MapCatsToPriority[(int)ThrottleOutPacketType.OutBand] = 7;
// Default the retransmission timeout to one second
RTO = m_defaultRTO;
// Initialize this to a sane value to prevent early disconnects
TickLastPacketReceived = Environment.TickCount & int.MaxValue;
}
public void SetThrottles(byte[] throttleData)
{
byte[] adjData;
int pos = 0;
if (!BitConverter.IsLittleEndian)
{
byte[] newData = new byte[7 * 4];
Buffer.BlockCopy(throttleData, 0, newData, 0, 7 * 4);
for (int i = 0; i < 7; i++)
{
Array.Reverse(newData, i * 4, 4);
}
adjData = newData;
}
else
{
adjData = throttleData;
}
// 0.125f converts from bits to bytes
int resend = (int)(BitConverter.ToSingle(adjData, pos) * 0.125f);
pos += 4;
int land = (int)(BitConverter.ToSingle(adjData, pos) * 0.125f);
pos += 4;
int wind = (int)(BitConverter.ToSingle(adjData, pos) * 0.125f);
pos += 4;
int cloud = (int)(BitConverter.ToSingle(adjData, pos) * 0.125f);
pos += 4;
int task = (int)(BitConverter.ToSingle(adjData, pos) * 0.125f);
pos += 4;
int texture = (int)(BitConverter.ToSingle(adjData, pos) * 0.125f);
pos += 4;
int asset = (int)(BitConverter.ToSingle(adjData, pos) * 0.125f);
int total = resend + land + wind + cloud + task + texture + asset;
// These are subcategories of task that we allocate a percentage to
int state = (int)(task * STATE_TASK_PERCENTAGE);
task -= state;
int transfer = (int)(asset * TRANSFER_ASSET_PERCENTAGE);
asset -= transfer;
// avatar info comes out from state
int avatarinfo = (int)(state * AVATAR_INFO_STATE_PERCENTAGE);
state -= avatarinfo;
// int total = resend + land + wind + cloud + task + texture + asset + state + avatarinfo;
// Make sure none of the throttles are set below our packet MTU,
// otherwise a throttle could become permanently clogged
Rates[(int)ThrottleOutPacketType.Resend] = resend;
Rates[(int)ThrottleOutPacketType.Land] = land;
Rates[(int)ThrottleOutPacketType.Wind] = wind;
Rates[(int)ThrottleOutPacketType.Cloud] = cloud;
Rates[(int)ThrottleOutPacketType.Task] = task + state + avatarinfo;
Rates[(int)ThrottleOutPacketType.Texture] = texture;
Rates[(int)ThrottleOutPacketType.Asset] = asset + transfer;
Rates[(int)ThrottleOutPacketType.State] = state;
TotalRateRequested = total;
TotalRateMin = (int)(total * 0.1);
if (TotalRateMin < MINPERCLIENTRATE)
{
TotalRateMin = MINPERCLIENTRATE;
}
total = TotalRateMin; // let it grow slowly
//MainConsole.Instance.WarnFormat("[LLUDPCLIENT]: {0} is setting throttles. Resend={1}, Land={2}, Wind={3}, Cloud={4}, Task={5}, Texture={6}, Asset={7}, State={8}, AvatarInfo={9}, Transfer={10}, TaskFull={11}, Total={12}",
// AgentID, resend, land, wind, cloud, task, texture, asset, state, avatarinfo, transfer, task + state + avatarinfo, total);
// Update the token buckets with new throttle values
TokenBucket bucket = m_throttle;
bucket.DripRate = total;
bucket.MaxBurst = total;
// Reset the packed throttles cached data
m_packedThrottles = null;
}
/// <summary>
/// Default constructor
/// </summary>
/// <param name="parent">
/// Parent bucket if this is a child bucket, or
/// null if this is a root bucket
/// </param>
/// <param name="maxBurst">
/// Maximum size of the bucket in bytes, or
/// zero if this bucket has no maximum capacity
/// </param>
/// <param name="dripRate">
/// Rate that the bucket fills, in bytes per
/// second. If zero, the bucket always remains full
/// </param>
public TokenBucket(TokenBucket parent, int maxBurst, int dripRate)
{
this.parent = parent;
MaxBurst = maxBurst;
DripRate = dripRate;
lastDrip = Environment.TickCount & Int32.MaxValue;
}