C# Class OpenSim.Region.ClientStack.LindenUDP.LLUDPClient

Tracks state for a client UDP connection and provides client-specific methods

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Public Properties

Property	Type	Description
AgentID	UUID
BytesSinceLastACK	int
CircuitCode	uint
CurrentPingSequence	byte
CurrentSequence	int
IsConnected	bool
IsPaused	bool
NeedAcks	UnackedPacketCollection
PacketArchive	OpenSim.Region.ClientStack.LindenUDP.IncomingPacketHistoryCollection
PacketsReceived	int
PacketsSent	int
PendingAcks	OpenSim.Framework.LocklessQueue
RTO	int
RTTVAR	float
RemoteEndPoint	System.Net.IPEndPoint
SRTT	float
TickLastPacketReceived	int
UnackedBytes	int

Public Methods

Method	Description
BackoffRTO ( ) : void	Exponential backoff of the retransmission timeout, per section 5.5 of RFC 2988
DequeueOutgoing ( ) : bool	Loops through all of the packet queues for this client and tries to send an outgoing packet from each, obeying the throttling bucket limits This function is only called from a synchronous loop in the UDPServer so we don't need to bother making this thread safe
EnqueueOutgoing ( OpenSim.Region.ClientStack.LindenUDP.OutgoingPacket packet ) : bool
GetClientInfo ( ) : ClientInfo	Gets information about this client connection
GetStats ( ) : string
GetThrottlesPacked ( ) : byte[]
LLUDPClient ( LLUDPServer server, OpenSim.Region.ClientStack.LindenUDP.ThrottleRates rates, OpenSim.Region.ClientStack.LindenUDP.TokenBucket parentThrottle, uint circuitCode, UUID agentID, IPEndPoint remoteEndPoint, int defaultRTO, int maxRTO ) : System	Default constructor
SendPacketStats ( ) : void
SetClientInfo ( ClientInfo info ) : void	Modifies the UDP throttles
SetThrottles ( byte throttleData ) : void
Shutdown ( ) : void	Shuts down this client connection
UpdateRoundTrip ( float r ) : void	Called when an ACK packet is received and a round-trip time for a packet is calculated. This is used to calculate the smoothed round-trip time, round trip time variance, and finally the retransmission timeout

Private Methods

Method	Description
BeginFireQueueEmpty ( ThrottleOutPacketTypeFlags categories ) : void	Does an early check to see if this queue empty callback is already running, then asynchronously firing the event
CategoryToFlag ( int i ) : ThrottleOutPacketTypeFlags	Converts a ThrottleOutPacketType integer to a flag value
FireQueueEmpty ( object o ) : void	Fires the OnQueueEmpty callback and sets the minimum time that it can be called again

Method Details

BackoffRTO() public method

Exponential backoff of the retransmission timeout, per section 5.5 of RFC 2988

public BackoffRTO ( ) : void
return	void

DequeueOutgoing() public method

Loops through all of the packet queues for this client and tries to send an outgoing packet from each, obeying the throttling bucket limits

This function is only called from a synchronous loop in the UDPServer so we don't need to bother making this thread safe

public DequeueOutgoing ( ) : bool
return	bool

EnqueueOutgoing() public method

public EnqueueOutgoing ( OpenSim.Region.ClientStack.LindenUDP.OutgoingPacket packet ) : bool
packet	OpenSim.Region.ClientStack.LindenUDP.OutgoingPacket
return	bool

GetClientInfo() public method

Gets information about this client connection

public GetClientInfo ( ) : ClientInfo
return	OpenSim.Framework.ClientInfo

GetStats() public method

public GetStats ( ) : string
return	string

GetThrottlesPacked() public method

public GetThrottlesPacked ( ) : byte[]
return	byte[]

LLUDPClient() public method

Default constructor

public LLUDPClient ( LLUDPServer server, OpenSim.Region.ClientStack.LindenUDP.ThrottleRates rates, OpenSim.Region.ClientStack.LindenUDP.TokenBucket parentThrottle, uint circuitCode, UUID agentID, IPEndPoint remoteEndPoint, int defaultRTO, int maxRTO ) : System
server	LLUDPServer	Reference to the UDP server this client is connected to
rates	OpenSim.Region.ClientStack.LindenUDP.ThrottleRates	Default throttling rates and maximum throttle limits
parentThrottle	OpenSim.Region.ClientStack.LindenUDP.TokenBucket	Parent HTB (hierarchical token bucket) /// that the child throttles will be governed by
circuitCode	uint	Circuit code for this connection
agentID	UUID	AgentID for the connected agent
remoteEndPoint	System.Net.IPEndPoint	Remote endpoint for this connection
defaultRTO	int
maxRTO	int
return	System

SendPacketStats() public method

public SendPacketStats ( ) : void
return	void

SetClientInfo() public method

Modifies the UDP throttles

public SetClientInfo ( ClientInfo info ) : void
info	OpenSim.Framework.ClientInfo	New throttling values
return	void

SetThrottles() public method

public SetThrottles ( byte throttleData ) : void
throttleData	byte
return	void

Shutdown() public method

Shuts down this client connection

public Shutdown ( ) : void
return	void

UpdateRoundTrip() public method

Called when an ACK packet is received and a round-trip time for a packet is calculated. This is used to calculate the smoothed round-trip time, round trip time variance, and finally the retransmission timeout

public UpdateRoundTrip ( float r ) : void
r	float	Round-trip time of a single packet and its /// acknowledgement
return	void

Property Details

AgentID public_oe property

AgentID for this client

public UUID AgentID
return	UUID

BytesSinceLastACK public_oe property

Number of bytes received since the last acknowledgement was sent out. This is used to loosely follow the TCP delayed ACK algorithm in RFC 1122 (4.2.3.2)

public int BytesSinceLastACK
return	int

CircuitCode public_oe property

Circuit code that this client is connected on

public uint CircuitCode
return	uint

CurrentPingSequence public_oe property

Current ping sequence number

public byte CurrentPingSequence
return	byte

CurrentSequence public_oe property

Current packet sequence number

public int CurrentSequence
return	int

IsConnected public_oe property

True when this connection is alive, otherwise false

public bool IsConnected
return	bool

IsPaused public_oe property

True when this connection is paused, otherwise false

public bool IsPaused
return	bool

NeedAcks public_oe property

Packets we have sent that need to be ACKed by the client

public UnackedPacketCollection,OpenSim.Region.ClientStack.LindenUDP NeedAcks
return	UnackedPacketCollection

PacketArchive public_oe property

Sequence numbers of packets we've received (for duplicate checking)

public IncomingPacketHistoryCollection,OpenSim.Region.ClientStack.LindenUDP PacketArchive
return	OpenSim.Region.ClientStack.LindenUDP.IncomingPacketHistoryCollection

PacketsReceived public_oe property

Number of packets received from this client

public int PacketsReceived
return	int

PacketsSent public_oe property

Number of packets sent to this client

public int PacketsSent
return	int

PendingAcks public_oe property

ACKs that are queued up, waiting to be sent to the client

public LocklessQueue,OpenSim.Framework PendingAcks
return	OpenSim.Framework.LocklessQueue

RTO public_oe property

Retransmission timeout. Packets that have not been acknowledged in this number of milliseconds or longer will be resent

Calculated from SRTT and RTTVAR using the guidelines in RFC 2988

public int RTO
return	int

RTTVAR public_oe property

Round-trip time variance. Measures the consistency of round-trip times

public float RTTVAR
return	float

RemoteEndPoint public_oe property

The remote address of the connected client

public IPEndPoint,System.Net RemoteEndPoint
return	System.Net.IPEndPoint

SRTT public_oe property

Smoothed round-trip time. A smoothed average of the round-trip time for sending a reliable packet to the client and receiving an ACK

public float SRTT
return	float

TickLastPacketReceived public_oe property

Environment.TickCount when the last packet was received for this client

public int TickLastPacketReceived
return	int

UnackedBytes public_oe property

Total byte count of unacked packets sent to this client

public int UnackedBytes
return	int