OutboundNTCP2State (Javadocs [I2P+ 2.11.0+]

java.lang.Object
- net.i2p.router.transport.ntcp.OutboundNTCP2State

All Implemented Interfaces:

EstablishState
```
class OutboundNTCP2State
extends Object
implements EstablishState
```
NTCP 2 only. We are Alice. Also contains static constants and methods used by InboundEstablishState for NTCP2. Does not extend EstablishBase.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`IV_SIZE`
`static int`	`KEY_SIZE`
`static int`	`MAC_SIZE`
`static long`	`MAX_SKEW` in SECONDS
`static int`	`MSG1_SIZE` 64
`static int`	`MSG2_SIZE`
`static int`	`MSG3P1_SIZE` 48
`static int`	`OPTIONS1_SIZE`
`static int`	`OPTIONS2_SIZE`
`static int`	`TOTAL1_MAX` one less than 288 byte NTCP1 msg 1
`static byte[]`	`ZEROKEY`

Constructor Summary

Constructors
Constructor and Description

OutboundNTCP2State(RouterContext ctx, NTCPTransport transport, NTCPConnection con)

Constructors
Constructor and Description
`OutboundNTCP2State(RouterContext ctx, NTCPTransport transport, NTCPConnection con)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`close(String reason, Exception e)` Release resources on timeout.
`protected void`	`fail(String reason)`
`protected void`	`fail(String reason, Exception e)`
`protected void`	`fail(String reason, Exception e, boolean bySkew)`
`(package private) static byte[][]`	`generateSipHashKeys(RouterContext ctx, HandshakeState state)` KDF for SipHash
`int`	`getVersion()` Get the NTCP version
`boolean`	`isComplete()` Don't synchronize this, deadlocks all over.
`boolean`	`isCorrupt()` did the handshake fail for some reason?
`boolean`	`isInitialState()` Check if the connection is in initial state and ready for prepareOutbound()
`boolean`	`isPrepareOutboundCalled()` Check if the connection is in a state where prepareOutbound() has already been called to avoid duplicate calls that cause IllegalStateException
`void`	`prepareOutbound()` We are Alice.
`void`	`receive(ByteBuffer src)` Parse the contents of the buffer as part of the handshake.
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - IV_SIZE
```
public static final int IV_SIZE
```
    See Also:
    
    Constant Field Values
  - KEY_SIZE
```
public static final int KEY_SIZE
```
    See Also:
    
    Constant Field Values
  - MAC_SIZE
```
public static final int MAC_SIZE
```
    See Also:
    
    Constant Field Values
  - MAX_SKEW
```
public static final long MAX_SKEW
```
    in SECONDS
    
    See Also:
    
    Constant Field Values
  - MSG1_SIZE
```
public static final int MSG1_SIZE
```
    64
    
    See Also:
    
    Constant Field Values
  - MSG2_SIZE
```
public static final int MSG2_SIZE
```
    See Also:
    
    Constant Field Values
  - MSG3P1_SIZE
```
public static final int MSG3P1_SIZE
```
    48
    
    See Also:
    
    Constant Field Values
  - OPTIONS1_SIZE
```
public static final int OPTIONS1_SIZE
```
    See Also:
    
    Constant Field Values
  - OPTIONS2_SIZE
```
public static final int OPTIONS2_SIZE
```
    See Also:
    
    Constant Field Values
  - TOTAL1_MAX
```
public static final int TOTAL1_MAX
```
    one less than 288 byte NTCP1 msg 1
    
    See Also:
    
    Constant Field Values
  - ZEROKEY
```
public static final byte[] ZEROKEY
```
- Constructor Detail
  - OutboundNTCP2State
```
public OutboundNTCP2State(RouterContext ctx,
                          NTCPTransport transport,
                          NTCPConnection con)
```
    Throws:
    
    IllegalArgumentException - on bad address in the con
- Method Detail
  - close
```
public void close(String reason,
                  Exception e)
```
    Release resources on timeout.
    
    Specified by:
    
    close in interface EstablishState
    
    Parameters:
    
    e - may be null
  - fail
```
protected void fail(String reason)
```
  - fail
```
protected void fail(String reason,
                    Exception e)
```
  - fail
```
protected void fail(String reason,
                    Exception e,
                    boolean bySkew)
```
  - generateSipHashKeys
```
static byte[][] generateSipHashKeys(RouterContext ctx,
                                    HandshakeState state)
```
    KDF for SipHash
    
    Returns:
    
    rv[0] is sip_ab, rv[1] is sip_ba
  - getVersion
```
public int getVersion()
```
    Get the NTCP version
    
    Specified by:
    
    getVersion in interface EstablishState
    
    Returns:
    
    2
  - isComplete
```
public boolean isComplete()
```
    Don't synchronize this, deadlocks all over.
    
    Specified by:
    
    isComplete in interface EstablishState
    
    Returns:
    
    is the handshake complete and valid?
  - isCorrupt
```
public boolean isCorrupt()
```
    did the handshake fail for some reason?
    
    Specified by:
    
    isCorrupt in interface EstablishState
  - isInitialState
```
public boolean isInitialState()
```
    Check if the connection is in initial state and ready for prepareOutbound()
  - isPrepareOutboundCalled
```
public boolean isPrepareOutboundCalled()
```
    Check if the connection is in a state where prepareOutbound() has already been called to avoid duplicate calls that cause IllegalStateException
  - prepareOutbound
```
public void prepareOutbound()
```
    We are Alice. We are establishing an outbound connection, so prepare ourselves by writing the first message in the handshake. Encrypt X and write X, the options block, and the padding. Save last half of encrypted X as IV for message 2 AES.
    
    Specified by:
    
    prepareOutbound in interface EstablishState
    
    Throws:
    
    IllegalStateException
  - receive
```
public void receive(ByteBuffer src)
```
    Parse the contents of the buffer as part of the handshake. All data must be copied out of the buffer as Reader.processRead() will return it to the pool.
    
    Specified by:
    
    receive in interface EstablishState
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class OutboundNTCP2State

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

IV_SIZE

KEY_SIZE

MAC_SIZE

MAX_SKEW

MSG1_SIZE

MSG2_SIZE

MSG3P1_SIZE

OPTIONS1_SIZE

OPTIONS2_SIZE

TOTAL1_MAX

ZEROKEY

Constructor Detail

OutboundNTCP2State

Method Detail

close

fail

fail

fail

generateSipHashKeys

getVersion

isComplete

isCorrupt

isInitialState

isPrepareOutboundCalled

prepareOutbound

receive

toString