Package net.i2p.client.streaming.impl

Class PacketLocal

java.lang.Object

net.i2p.client.streaming.impl.Packet

net.i2p.client.streaming.impl.PacketLocal

All Implemented Interfaces:

MessageOutputStream.WriteStatus

class PacketLocal
extends Packet
implements MessageOutputStream.WriteStatus

This is the class used for outbound packets. coordinate local attributes about a packet - send time, ack time, number of retries, etc.

Field Summary

Fields inherited from class net.i2p.client.streaming.impl.Packet

_nacks, _offlineSignature, _optionFrom, _optionSignature, _session, _transientExpires, _transientSigningPublicKey, DEFAULT_MAX_SIZE, FLAG_CLOSE, FLAG_DELAY_REQUESTED, FLAG_ECHO, FLAG_FROM_INCLUDED, FLAG_MAX_PACKET_SIZE_INCLUDED, FLAG_NO_ACK, FLAG_PROFILE_INTERACTIVE, FLAG_RESET, FLAG_SIGNATURE_INCLUDED, FLAG_SIGNATURE_OFFLINE, FLAG_SIGNATURE_REQUESTED, FLAG_SYNCHRONIZE, MAX_DELAY_REQUEST, MAX_PAYLOAD_SIZE, MAX_STREAM_ID, MIN_DELAY_CHOKE, SEND_DELAY_CHOKE, STREAM_ID_UNKNOWN

Constructor Summary

Constructors

Constructor	Description
PacketLocal(I2PAppContext ctx, Destination to, I2PSession session)	not bound to a connection
PacketLocal(I2PAppContext ctx, Destination to, Connection con)	bound to a connection

Method Summary

Modifier and Type	Method	Description
void	ackReceived()
void	cancelled()
StringBuilder	formatAsString()
int	getAckTime()	how long after packet creation was it acked?
Connection	getConnection()
long	getCreatedOn()
SessionKey	getKeyUsed()	Deprecated. should always return null
long	getLastSend()
long	getLifetime()
int	getNACKs()
int	getNumSends()
Set<SessionTag>	getTagsSent()	Deprecated. should always return null or an empty set
int	getTimeout()	Used by PacketQueue to feed an expiration to the router.
Destination	getTo()
void	incrementNACKs()	Will force a fast restransmit on the 3rd call (FAST_RETRANSMIT_THRESHOLD) but only if it's the lowest unacked (see Connection.ResendPacketEvent)
void	incrementSends()
void	logTCPDump()	Generate a pcap/tcpdump-compatible format, so we can use standard debugging tools.
void	setKeyUsed(SessionKey key)	Deprecated. I2PSession throws out the tags
void	setOptionalFrom()	This sets the from field in the packet to the Destination for the session provided in the constructor.
void	setTagsSent(Set<SessionTag> tags)	Deprecated. I2PSession throws out the tags
void	setTimeout(int timeout)
boolean	shouldSign()
void	waitForAccept(int maxWaitMs)	Blocks until outbound window is not full.
void	waitForCompletion(int maxWaitMs)	block until the packet is acked from the far end
boolean	writeAccepted()	Was the write was accepted.
boolean	writeFailed()	did the write fail?
int	writeSignedPacket(byte[] buffer, int offset)	Sign and write the packet to the buffer (starting at the offset) and return the number of bytes written.
boolean	writeSuccessful()	did the write succeed?

Methods inherited from class net.i2p.client.streaming.impl.Packet

acquirePayload, getAckThrough, getLocalPort, getNacks, getOptionalDelay, getOptionalFrom, getOptionalMaxSize, getOptionalSignature, getPayload, getPayloadSize, getReceiveStreamId, getRemotePort, getResendDelay, getSendStreamId, getSequenceNum, getSession, getTransientSPK, isFlagSet, logTCPDump, readPacket, releasePayload, setAckThrough, setFlag, setFlag, setLocalPort, setNacks, setOptionalDelay, setOptionalMaxSize, setOptionalSignature, setPayload, setReceiveStreamId, setRemotePort, setResendDelay, setSendStreamId, setSequenceNum, toId, toString, verifySignature, verifySignature, writePacket, writePacket

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

PacketLocal

public PacketLocal(I2PAppContext ctx,
 Destination to,
 I2PSession session)

not bound to a connection

PacketLocal

public PacketLocal(I2PAppContext ctx,
 Destination to,
 Connection con)

bound to a connection

Method Details

setOptionalFrom

public void setOptionalFrom()

This sets the from field in the packet to the Destination for the session provided in the constructor. This also sets flag FLAG_FROM_INCLUDED. Also, as of 0.9.39, sets the offline signing data if supported by the session.

Since:

0.9.39 moved from super

getTo

public Destination getTo()

getKeyUsed

@Deprecated
public SessionKey getKeyUsed()

Deprecated.

should always return null

setKeyUsed

@Deprecated
public void setKeyUsed(SessionKey key)

Deprecated.

I2PSession throws out the tags

getTagsSent

@Deprecated
public Set<SessionTag> getTagsSent()

Deprecated.

should always return null or an empty set

setTagsSent

@Deprecated
public void setTagsSent(Set<SessionTag> tags)

Deprecated.

I2PSession throws out the tags

shouldSign

public boolean shouldSign()

getCreatedOn

public long getCreatedOn()

getLifetime

public long getLifetime()

incrementSends

public void incrementSends()

ackReceived

public void ackReceived()

cancelled

public void cancelled()

getAckTime

public int getAckTime()

how long after packet creation was it acked?

Returns:

how long after packet creation the packet was ACKed in ms

getNumSends

public int getNumSends()

getLastSend

public long getLastSend()

getConnection

public Connection getConnection()

Returns:

null if not bound

incrementNACKs

public void incrementNACKs()

Will force a fast restransmit on the 3rd call (FAST_RETRANSMIT_THRESHOLD) but only if it's the lowest unacked (see Connection.ResendPacketEvent)

getNACKs

public int getNACKs()

getTimeout

public int getTimeout()

Used by PacketQueue to feed an expiration to the router.

Returns:

time from now, not absolute time. May be zero if unset.

Since:

0.9.46

setTimeout

public void setTimeout(int timeout)

Parameters:

timeout - time from now, not absolute time

Since:

0.9.46

writeSignedPacket

public int writeSignedPacket(byte[] buffer,
 int offset)
                      throws IllegalStateException

Sign and write the packet to the buffer (starting at the offset) and return the number of bytes written.

Parameters:

buffer - data to be written

offset - starting point in the buffer

Returns:

Count of bytes written

Throws:

IllegalStateException - if there is data missing or otherwise b0rked

Since:

0.9.20 moved from Packet

formatAsString

public StringBuilder formatAsString()

Overrides:

formatAsString in class Packet

waitForAccept

public void waitForAccept(int maxWaitMs)
                   throws IOException,
InterruptedException

Blocks until outbound window is not full. See Connection.packetSendChoke().

Specified by:

waitForAccept in interface MessageOutputStream.WriteStatus

Parameters:

maxWaitMs - MessageOutputStream is the only caller, generally with -1

Throws:

IOException

InterruptedException

waitForCompletion

public void waitForCompletion(int maxWaitMs)
                       throws IOException,
InterruptedException

block until the packet is acked from the far end

Specified by:

waitForCompletion in interface MessageOutputStream.WriteStatus

Parameters:

maxWaitMs - -1 = forever

Throws:

IOException

InterruptedException

writeAccepted

public boolean writeAccepted()

Description copied from interface: MessageOutputStream.WriteStatus

Was the write was accepted. aka did the socket not close?

Specified by:

writeAccepted in interface MessageOutputStream.WriteStatus

writeFailed

public boolean writeFailed()

Description copied from interface: MessageOutputStream.WriteStatus

did the write fail?

Specified by:

writeFailed in interface MessageOutputStream.WriteStatus

writeSuccessful

public boolean writeSuccessful()

Description copied from interface: MessageOutputStream.WriteStatus

did the write succeed?

Specified by:

writeSuccessful in interface MessageOutputStream.WriteStatus

logTCPDump

public void logTCPDump()

Generate a pcap/tcpdump-compatible format, so we can use standard debugging tools.