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113fbc1df3814136f7bc628d56f7ec620a6952ad
i2p.i2p/apps/streaming/java/src/net/i2p/client/streaming/ConnectionOptions.java
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jrandom 113fbc1df3 2006-02-15 jrandom 
* Merged in the i2p_0_6_1_10_PRE branch to the trunk, so CVS HEAD is no
      longer backwards compatible (and should not be used until 0.6.1.1 is
      out)
2006-02-15 05:33:17 +00:00

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Java
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package net.i2p.client.streaming;
import java.util.Properties;
/**
* Define the current options for the con (and allow custom tweaking midstream)
*
*/
public class ConnectionOptions extends I2PSocketOptionsImpl {
private int _connectDelay;
private boolean _fullySigned;
private volatile int _windowSize;
private int _receiveWindow;
private int _profile;
private int _rtt;
private int _rttDev;
private int _rto;
private int _trend[];
private int _resendDelay;
private int _sendAckDelay;
private int _maxMessageSize;
private int _choke;
private int _maxResends;
private int _inactivityTimeout;
private int _inactivityAction;
private int _inboundBufferSize;
private int _maxWindowSize;
private int _congestionAvoidanceGrowthRateFactor;
private int _slowStartGrowthRateFactor;
public static final int PROFILE_BULK = 1;
public static final int PROFILE_INTERACTIVE = 2;
/** on inactivity timeout, do nothing */
public static final int INACTIVITY_ACTION_NOOP = 0;
/** on inactivity timeout, close the connection */
public static final int INACTIVITY_ACTION_DISCONNECT = 1;
/** on inactivity timeout, send a payload message */
public static final int INACTIVITY_ACTION_SEND = 2;
public static final String PROP_CONNECT_DELAY = "i2p.streaming.connectDelay";
public static final String PROP_PROFILE = "i2p.streaming.profile";
public static final String PROP_MAX_MESSAGE_SIZE = "i2p.streaming.maxMessageSize";
public static final String PROP_MAX_RESENDS = "i2p.streaming.maxResends";
public static final String PROP_INITIAL_RTT = "i2p.streaming.initialRTT";
public static final String PROP_INITIAL_RESEND_DELAY = "i2p.streaming.initialResendDelay";
public static final String PROP_INITIAL_ACK_DELAY = "i2p.streaming.initialAckDelay";
public static final String PROP_INITIAL_WINDOW_SIZE = "i2p.streaming.initialWindowSize";
public static final String PROP_INITIAL_RECEIVE_WINDOW = "i2p.streaming.initialReceiveWindow";
public static final String PROP_INACTIVITY_TIMEOUT = "i2p.streaming.inactivityTimeout";
public static final String PROP_INACTIVITY_ACTION = "i2p.streaming.inactivityAction";
public static final String PROP_MAX_WINDOW_SIZE = "i2p.streaming.maxWindowSize";
public static final String PROP_CONGESTION_AVOIDANCE_GROWTH_RATE_FACTOR = "i2p.streaming.congestionAvoidanceGrowthRateFactor";
public static final String PROP_SLOW_START_GROWTH_RATE_FACTOR = "i2p.streaming.slowStartGrowthRateFactor";
private static final int TREND_COUNT = 3;
static final int INITIAL_WINDOW_SIZE = 12;
static final int DEFAULT_MAX_SENDS = 8;
static final int MIN_WINDOW_SIZE = INITIAL_WINDOW_SIZE;
public ConnectionOptions() {
super();
}
public ConnectionOptions(Properties opts) {
super(opts);
}
public ConnectionOptions(I2PSocketOptions opts) {
super(opts);
}
public ConnectionOptions(ConnectionOptions opts) {
super(opts);
if (opts != null) {
setMaxWindowSize(opts.getMaxWindowSize());
setConnectDelay(opts.getConnectDelay());
setProfile(opts.getProfile());
setRTT(opts.getRTT());
setRequireFullySigned(opts.getRequireFullySigned());
setWindowSize(opts.getWindowSize());
setResendDelay(opts.getResendDelay());
setMaxMessageSize(opts.getMaxMessageSize());
setChoke(opts.getChoke());
setMaxResends(opts.getMaxResends());
setInactivityTimeout(opts.getInactivityTimeout());
setInactivityAction(opts.getInactivityAction());
setInboundBufferSize(opts.getInboundBufferSize());
setCongestionAvoidanceGrowthRateFactor(opts.getCongestionAvoidanceGrowthRateFactor());
setSlowStartGrowthRateFactor(opts.getSlowStartGrowthRateFactor());
setWriteTimeout(opts.getWriteTimeout());
setReadTimeout(opts.getReadTimeout());
}
}
protected void init(Properties opts) {
super.init(opts);
_trend = new int[TREND_COUNT];
setMaxWindowSize(getInt(opts, PROP_MAX_WINDOW_SIZE, Connection.MAX_WINDOW_SIZE));
setConnectDelay(getInt(opts, PROP_CONNECT_DELAY, -1));
setProfile(getInt(opts, PROP_PROFILE, PROFILE_BULK));
setMaxMessageSize(getInt(opts, PROP_MAX_MESSAGE_SIZE, 4*1024));
setRTT(getInt(opts, PROP_INITIAL_RTT, 10*1000));
setReceiveWindow(getInt(opts, PROP_INITIAL_RECEIVE_WINDOW, 1));
setResendDelay(getInt(opts, PROP_INITIAL_RESEND_DELAY, 1000));
setSendAckDelay(getInt(opts, PROP_INITIAL_ACK_DELAY, 2000));
setWindowSize(getInt(opts, PROP_INITIAL_WINDOW_SIZE, INITIAL_WINDOW_SIZE));
setMaxResends(getInt(opts, PROP_MAX_RESENDS, DEFAULT_MAX_SENDS));
setWriteTimeout(getInt(opts, PROP_WRITE_TIMEOUT, -1));
setInactivityTimeout(getInt(opts, PROP_INACTIVITY_TIMEOUT, 90*1000));
setInactivityAction(getInt(opts, PROP_INACTIVITY_ACTION, INACTIVITY_ACTION_SEND));
setInboundBufferSize(getMaxMessageSize() * (Connection.MAX_WINDOW_SIZE + 2));
setCongestionAvoidanceGrowthRateFactor(getInt(opts, PROP_CONGESTION_AVOIDANCE_GROWTH_RATE_FACTOR, 1));
setSlowStartGrowthRateFactor(getInt(opts, PROP_SLOW_START_GROWTH_RATE_FACTOR, 1));
setConnectTimeout(getInt(opts, PROP_CONNECT_TIMEOUT, Connection.DISCONNECT_TIMEOUT));
}
public void setProperties(Properties opts) {
super.setProperties(opts);
if (opts == null) return;
if (opts.containsKey(PROP_MAX_WINDOW_SIZE))
setMaxWindowSize(getInt(opts, PROP_MAX_WINDOW_SIZE, Connection.MAX_WINDOW_SIZE));
if (opts.containsKey(PROP_CONNECT_DELAY))
setConnectDelay(getInt(opts, PROP_CONNECT_DELAY, -1));
if (opts.containsKey(PROP_PROFILE))
setProfile(getInt(opts, PROP_PROFILE, PROFILE_BULK));
if (opts.containsKey(PROP_MAX_MESSAGE_SIZE))
setMaxMessageSize(getInt(opts, PROP_MAX_MESSAGE_SIZE, Packet.MAX_PAYLOAD_SIZE));
if (opts.containsKey(PROP_INITIAL_RTT))
setRTT(getInt(opts, PROP_INITIAL_RTT, 10*1000));
if (opts.containsKey(PROP_INITIAL_RECEIVE_WINDOW))
setReceiveWindow(getInt(opts, PROP_INITIAL_RECEIVE_WINDOW, 1));
if (opts.containsKey(PROP_INITIAL_RESEND_DELAY))
setResendDelay(getInt(opts, PROP_INITIAL_RESEND_DELAY, 1000));
if (opts.containsKey(PROP_INITIAL_ACK_DELAY))
setSendAckDelay(getInt(opts, PROP_INITIAL_ACK_DELAY, 2000));
if (opts.containsKey(PROP_INITIAL_WINDOW_SIZE))
setWindowSize(getInt(opts, PROP_INITIAL_WINDOW_SIZE, INITIAL_WINDOW_SIZE));
if (opts.containsKey(PROP_MAX_RESENDS))
setMaxResends(getInt(opts, PROP_MAX_RESENDS, DEFAULT_MAX_SENDS));
if (opts.containsKey(PROP_WRITE_TIMEOUT))
setWriteTimeout(getInt(opts, PROP_WRITE_TIMEOUT, -1));
if (opts.containsKey(PROP_INACTIVITY_TIMEOUT))
setInactivityTimeout(getInt(opts, PROP_INACTIVITY_TIMEOUT, 90*1000));
if (opts.containsKey(PROP_INACTIVITY_ACTION))
setInactivityAction(getInt(opts, PROP_INACTIVITY_ACTION, INACTIVITY_ACTION_SEND));
setInboundBufferSize(getMaxMessageSize() * (Connection.MAX_WINDOW_SIZE + 2));
if (opts.contains(PROP_CONGESTION_AVOIDANCE_GROWTH_RATE_FACTOR))
setCongestionAvoidanceGrowthRateFactor(getInt(opts, PROP_CONGESTION_AVOIDANCE_GROWTH_RATE_FACTOR, 2));
if (opts.contains(PROP_SLOW_START_GROWTH_RATE_FACTOR))
setSlowStartGrowthRateFactor(getInt(opts, PROP_SLOW_START_GROWTH_RATE_FACTOR, 2));
if (opts.containsKey(PROP_CONNECT_TIMEOUT))
setConnectTimeout(getInt(opts, PROP_CONNECT_TIMEOUT, Connection.DISCONNECT_TIMEOUT));
}
/**
* how long will we wait after instantiating a new con
* before actually attempting to connect. If this is
* set to 0, connect ASAP. If it is greater than 0, wait
* until the output stream is flushed, the buffer fills,
* or that many milliseconds pass.
*
*/
public int getConnectDelay() { return _connectDelay; }
public void setConnectDelay(int delayMs) { _connectDelay = delayMs; }
/**
* Do we want all packets in both directions to be signed,
* or can we deal with signatures on the SYN and FIN packets
* only?
*
*/
public boolean getRequireFullySigned() { return _fullySigned; }
public void setRequireFullySigned(boolean sign) { _fullySigned = sign; }
/**
* How many messages will we send before waiting for an ACK?
*
*/
public int getWindowSize() { return _windowSize; }
public void setWindowSize(int numMsgs) {
if (numMsgs <= 0)
numMsgs = 1;
if (numMsgs < MIN_WINDOW_SIZE)
numMsgs = MIN_WINDOW_SIZE;
// the stream's max window size may be less than the min window size, for
// instance, with interactive streams of cwin=1. This is why we test it here
// after checking MIN_WINDOW_SIZE
if (numMsgs > _maxWindowSize)
numMsgs = _maxWindowSize;
_windowSize = numMsgs;
}
/** after how many consecutive messages should we ack? */
public int getReceiveWindow() { return _receiveWindow; }
public void setReceiveWindow(int numMsgs) { _receiveWindow = numMsgs; }
/**
* What to set the round trip time estimate to (in milliseconds)
*/
public int getRTT() { return _rtt; }
public void setRTT(int ms) {
if (_rto == 0) {
_rttDev = ms;
_rto = (int)Connection.MAX_RESEND_DELAY;
}
synchronized (_trend) {
_trend[0] = _trend[1];
_trend[1] = _trend[2];
if (ms > _rtt)
_trend[2] = 1;
else if (ms < _rtt)
_trend[2] = -1;
else
_trend[2] = 0;
}
_rtt = ms;
if (_rtt > 60*1000)
_rtt = 60*1000;
}
public int getRTO() { return _rto; }
/**
* If we have 3 consecutive rtt increases, we are trending upwards (1), or if we have
* 3 consecutive rtt decreases, we are trending downwards (-1), else we're stable.
*
*/
public int getRTTTrend() {
synchronized (_trend) {
for (int i = 0; i < TREND_COUNT - 1; i++) {
if (_trend[i] != _trend[i+1])
return 0;
}
return _trend[0];
}
}
/** rtt = rtt*RTT_DAMPENING + (1-RTT_DAMPENING)*currentPacketRTT */
private static final double RTT_DAMPENING = 0.9;
public void updateRTT(int measuredValue) {
_rttDev = _rttDev + (int)(0.25d*(Math.abs(measuredValue-_rtt)-_rttDev));
int smoothed = (int)(RTT_DAMPENING*_rtt + (1-RTT_DAMPENING)*measuredValue);
_rto = smoothed + (_rttDev<<2);
if (_rto < Connection.MIN_RESEND_DELAY)
_rto = (int)Connection.MIN_RESEND_DELAY;
else if (_rto > Connection.MAX_RESEND_DELAY)
_rto = (int)Connection.MAX_RESEND_DELAY;
setRTT(smoothed);
}
/** How long after sending a packet will we wait before resending? */
public int getResendDelay() { return _resendDelay; }
public void setResendDelay(int ms) { _resendDelay = ms; }
/**
* if there are packets we haven't ACKed yet and we don't
* receive _receiveWindow messages before
* (_lastSendTime+_sendAckDelay), send an ACK of what
* we have received so far.
*
*/
public int getSendAckDelay() { return _sendAckDelay; }
public void setSendAckDelay(int delayMs) { _sendAckDelay = delayMs; }
/** What is the largest message we want to send or receive? */
public int getMaxMessageSize() { return _maxMessageSize; }
public void setMaxMessageSize(int bytes) { _maxMessageSize = bytes; }
/**
* how long we want to wait before any data is transferred on the
* connection in either direction
*
*/
public int getChoke() { return _choke; }
public void setChoke(int ms) { _choke = ms; }
/**
* What profile do we want to use for this connection?
*
*/
public int getProfile() { return _profile; }
public void setProfile(int profile) {
if (profile != PROFILE_BULK)
throw new IllegalArgumentException("Only bulk is supported so far");
_profile = profile;
}
/**
* How many times will we try to send a message before giving up?
*
*/
public int getMaxResends() { return _maxResends; }
public void setMaxResends(int numSends) { _maxResends = numSends; }
/**
* What period of inactivity qualifies as "too long"?
*
*/
public int getInactivityTimeout() { return _inactivityTimeout; }
public void setInactivityTimeout(int timeout) { _inactivityTimeout = timeout; }
public int getInactivityAction() { return _inactivityAction; }
public void setInactivityAction(int action) { _inactivityAction = action; }
public int getMaxWindowSize() { return _maxWindowSize; }
public void setMaxWindowSize(int msgs) {
if (msgs > Connection.MAX_WINDOW_SIZE)
_maxWindowSize = Connection.MAX_WINDOW_SIZE;
else if (msgs < 1)
_maxWindowSize = 1;
else
_maxWindowSize = msgs;
}
/**
* how much data are we willing to accept in our buffer?
*
*/
public int getInboundBufferSize() { return _inboundBufferSize; }
public void setInboundBufferSize(int bytes) { _inboundBufferSize = bytes; }
/**
* When we're in congestion avoidance, we grow the window size at the rate
* of 1/(windowSize*factor). In standard TCP, window sizes are in bytes,
* while in I2P, window sizes are in messages, so setting factor=maxMessageSize
* mimics TCP, but using a smaller factor helps grow a little more rapidly.
*/
public int getCongestionAvoidanceGrowthRateFactor() { return _congestionAvoidanceGrowthRateFactor; }
public void setCongestionAvoidanceGrowthRateFactor(int factor) { _congestionAvoidanceGrowthRateFactor = factor; }
/**
* When we're in slow start, we grow the window size at the rate
* of 1/(factor). In standard TCP, window sizes are in bytes,
* while in I2P, window sizes are in messages, so setting factor=maxMessageSize
* mimics TCP, but using a smaller factor helps grow a little more rapidly.
*/
public int getSlowStartGrowthRateFactor() { return _slowStartGrowthRateFactor; }
public void setSlowStartGrowthRateFactor(int factor) { _slowStartGrowthRateFactor = factor; }
public String toString() {
StringBuffer buf = new StringBuffer(128);
buf.append("conDelay=").append(_connectDelay);
buf.append(" maxSize=").append(_maxMessageSize);
buf.append(" rtt=").append(_rtt);
buf.append(" rwin=").append(_receiveWindow);
buf.append(" resendDelay=").append(_resendDelay);
buf.append(" ackDelay=").append(_sendAckDelay);
buf.append(" cwin=").append(_windowSize);
buf.append(" maxResends=").append(_maxResends);
buf.append(" writeTimeout=").append(getWriteTimeout());
buf.append(" readTimeout=").append(getReadTimeout());
buf.append(" inactivityTimeout=").append(_inactivityTimeout);
buf.append(" inboundBuffer=").append(_inboundBufferSize);
buf.append(" maxWindowSize=").append(_maxWindowSize);
return buf.toString();
}
public static void main(String args[]) {
Properties p = new Properties();
p.setProperty(PROP_CONNECT_DELAY, "1000");
ConnectionOptions c = new ConnectionOptions(p);
System.out.println("opts: " + c);
c = new ConnectionOptions(new I2PSocketOptionsImpl(p));
System.out.println("opts: " + c);
}
}
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