net.i2p.i2ptunnel.socks

Class SOCKS4aServer

java.lang.Object

net.i2p.i2ptunnel.socks.SOCKSServer

net.i2p.i2ptunnel.socks.SOCKS4aServer

class SOCKS4aServer
extends SOCKSServer

SOCKS4a server implementation for handling SOCKS version 4/4a connections.

This class processes SOCKS4a protocol requests, supporting both IPv4 addresses and domain name resolution (the "4a" extension). It validates requests, maps IP addresses to domain names when configured, and forwards connections to I2P destinations or outproxies.

Handles CONNECT commands, rejects unsupported BIND commands, and provides proper error responses. The server integrates with I2P naming service for destination resolution and supports security restrictions on localhost access.

Field Summary

Fields inherited from class net.i2p.i2ptunnel.socks.SOCKSServer

_context, _log, addressType, clientSock, connHostName, connPort, props

Constructor Summary

Constructors

Constructor and Description
SOCKS4aServer(I2PAppContext ctx, Socket clientSock, Properties props) Create a SOCKS4a server that communicates with the client using the specified socket.

Method Summary

Modifier and Type	Method and Description
protected void	confirmConnection() Confirm to the client that the connection has succeeded
Socket	getClientSocket() Get a socket that can be used to send/receive 8-bit clean data to/from the client.
I2PSocket	getDestinationI2PSocket(I2PSOCKSTunnel t) Get an I2PSocket that can be used to send/receive 8-bit clean data to/from the destination of the SOCKS connection.
protected void	setupServer() Perform server initialization (expecially regarding protected variables).

Methods inherited from class net.i2p.i2ptunnel.socks.SOCKSServer

getMappedDomainNameForIP, getOutproxyPlugin

Methods inherited from class java.lang.Object

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

Constructor Detail

SOCKS4aServer

public SOCKS4aServer(I2PAppContext ctx,
                     Socket clientSock,
                     Properties props)

Create a SOCKS4a server that communicates with the client using the specified socket. This method should not be invoked directly: new SOCKS4aServer objects should be created by using SOCKSServerFactory.createSOCSKServer(). It is assumed that the SOCKS VER field has been stripped from the input stream of the client socket.

Parameters:

clientSock - client socket

props - non-null

Method Detail

confirmConnection

protected void confirmConnection()
                          throws SOCKSException

Description copied from class: SOCKSServer

Confirm to the client that the connection has succeeded

Specified by:

confirmConnection in class SOCKSServer

Throws:

SOCKSException

getClientSocket

public Socket getClientSocket()
                       throws SOCKSException

Description copied from class: SOCKSServer

Get a socket that can be used to send/receive 8-bit clean data to/from the client.

Specified by:

getClientSocket in class SOCKSServer

Returns:

a Socket connected with the client

Throws:

SOCKSException

getDestinationI2PSocket

public I2PSocket getDestinationI2PSocket(I2PSOCKSTunnel t)
                                  throws SOCKSException

Get an I2PSocket that can be used to send/receive 8-bit clean data to/from the destination of the SOCKS connection.

Specified by:

getDestinationI2PSocket in class SOCKSServer

Returns:

an I2PSocket connected with the destination

Throws:

SOCKSException

setupServer

protected void setupServer()
                    throws SOCKSException

Description copied from class: SOCKSServer

Perform server initialization (expecially regarding protected variables).

Specified by:

setupServer in class SOCKSServer

Throws:

SOCKSException