SOCKSUDPUnwrapper | Javadocs [I2P+]

java.lang.Object

net.i2p.i2ptunnel.socks.SOCKSUDPUnwrapper

All Implemented Interfaces:: Sink, Source

public class SOCKSUDPUnwrapperextends Object implements Source, Sink

Strip a SOCKS header off a datagram, convert it to a Destination and port Ref: RFC 1928.

Field Summary
Fields
Modifier and Type
Field
Description
private final Map<I2PSocketAddress, SOCKSHeader>
cache
Headers remembered for each peer address
private Sink
sink
Where the unwrapped datagram is passed on.
Constructor Summary
Constructors
Constructor
Description
SOCKSUDPUnwrapper(Map<I2PSocketAddress, SOCKSHeader> cache)
Hold the header cache that maps each unwrapped destination back to the SOCKS header its returning datagrams must be re-encased with.
Method Summary
All Methods
Modifier and Type
Method
Description
void
send(Destination ignoredFrom, int fromPort, int toPort, byte[] data)
May throw RuntimeException from underlying sink.
void
setSink(Sink sink)
Sets the sink for outgoing unwrapped UDP datagrams.
void
start()
Starts the unwrapper.
Methods inherited from class Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- sink
  private Sink sink
  Where the unwrapped datagram is passed on.
- cache
  private final Map<I2PSocketAddress, SOCKSHeader> cache
  Headers remembered for each peer address
Constructor Details
- SOCKSUDPUnwrapper
  public SOCKSUDPUnwrapper(Map<I2PSocketAddress, SOCKSHeader> cache)
  Hold the header cache that maps each unwrapped destination back to the SOCKS header its returning datagrams must be re-encased with.
  Parameters:
  cache - put headers here to pass to SOCKSUDPWrapper
Method Details
- setSink
  public void setSink(Sink sink)
  Sets the sink for outgoing unwrapped UDP datagrams.
  Specified by:
  setSink in interface Source
  Parameters:
  sink - the sink to receive unwrapped datagrams
- start
  public void start()
  Starts the unwrapper. No-op for this implementation.
  Specified by:
  start in interface Source
- send
  public void send(Destination ignoredFrom, int fromPort, int toPort, byte[] data)
  May throw RuntimeException from underlying sink.
  Specified by:
  send in interface Sink
  Parameters:
  ignoredFrom - unused; the SOCKS header in the data supplies the destination instead, as this unwrapper never sends from itself
  fromPort - will be passed along
  toPort - the UDP port to send to, taken from the SOCKS header rather than from this argument
  data - the datagram payload to deliver to the destination
  Throws:
  RuntimeException - if the downstream sink fails to send the unwrapped data