diff options
Diffstat (limited to 'app/src/main/java/net/sourceforge/jsocks/SocksSocket.java')
-rw-r--r-- | app/src/main/java/net/sourceforge/jsocks/SocksSocket.java | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/app/src/main/java/net/sourceforge/jsocks/SocksSocket.java b/app/src/main/java/net/sourceforge/jsocks/SocksSocket.java new file mode 100644 index 0000000..cf9ff65 --- /dev/null +++ b/app/src/main/java/net/sourceforge/jsocks/SocksSocket.java @@ -0,0 +1,291 @@ +package net.sourceforge.jsocks; + +import java.net.*; +import java.io.*; + +/** + * SocksSocket tryies to look very similar to normal Socket, + * while allowing connections through the SOCKS4 or 5 proxy. + * To use this class you will have to identify proxy you need + * to use, Proxy class allows you to set default proxy, which + * will be used by all Socks aware sockets. You can also create + * either Socks4Proxy or Socks5Proxy, and use them by passing to the + * appropriate constructors. + * <P> + * Using Socks package can be as easy as that: + * + * <pre><tt> + * + * import Socks.*; + * .... + * + * try{ + * //Specify SOCKS5 proxy + * Proxy.setDefaultProxy("socks-proxy",1080); + * + * //OR you still use SOCKS4 + * //Code below uses SOCKS4 proxy + * //Proxy.setDefaultProxy("socks-proxy",1080,userName); + * + * Socket s = SocksSocket("some.host.of.mine",13); + * readTimeFromSock(s); + * }catch(SocksException sock_ex){ + * //Usually it will turn in more or less meaningfull message + * System.err.println("SocksException:"+sock_ex); + * } + * + * </tt></pre> + *<P> + * However if the need exist for more control, like resolving addresses + * remotely, or using some non-trivial authentication schemes, it can be done. + */ + +public class SocksSocket extends Socket{ + //Data members + protected Proxy proxy; + protected String localHost, remoteHost; + protected InetAddress localIP, remoteIP; + protected int localPort,remotePort; + + private Socket directSock = null; + + /** + * Tryies to connect to given host and port + * using default proxy. If no default proxy speciefied + * it throws SocksException with error code SOCKS_NO_PROXY. + @param host Machine to connect to. + @param port Port to which to connect. + * @see SocksSocket#SocksSocket(Proxy,String,int) + * @see Socks5Proxy#resolveAddrLocally + */ + public SocksSocket(String host,int port) + throws SocksException,UnknownHostException{ + this(Proxy.defaultProxy,host,port); + } + /** + * Connects to host port using given proxy server. + @param p Proxy to use. + @param host Machine to connect to. + @param port Port to which to connect. + @throws UnknownHostException + If one of the following happens: + <ol> + + <li> Proxy settings say that address should be resolved locally, but + this fails. + <li> Proxy settings say that the host should be contacted directly but + host name can't be resolved. + </ol> + @throws SocksException + If one of the following happens: + <ul> + <li> Proxy is is null. + <li> Proxy settings say that the host should be contacted directly but + this fails. + <li> Socks Server can't be contacted. + <li> Authentication fails. + <li> Connection is not allowed by the SOCKS proxy. + <li> SOCKS proxy can't establish the connection. + <li> Any IO error occured. + <li> Any protocol error occured. + </ul> + @throws IOexception if anything is wrong with I/O. + @see Socks5Proxy#resolveAddrLocally + */ + public SocksSocket(Proxy p, String host, int port) throws SocksException, + UnknownHostException { + remoteHost = host; + remotePort = port; + remoteIP = InetAddress.getByName(host); + doDirect(); + } + + /** + Connects to given ip and port using given Proxy server. + @param p Proxy to use. + @param ip Machine to connect to. + @param port Port to which to connect. + + */ + public SocksSocket(InetAddress ip, int port) throws SocksException{ + this.remoteIP = ip; + this.remotePort = port; + this.remoteHost = ip.getHostName(); + doDirect(); + } + + + /** + * These 2 constructors are used by the SocksServerSocket. + * This socket simply overrides remoteHost, remotePort + */ + protected SocksSocket(String host,int port,Proxy proxy){ + this.remotePort = port; + this.proxy = proxy; + this.localIP = proxy.proxySocket.getLocalAddress(); + this.localPort = proxy.proxySocket.getLocalPort(); + this.remoteHost = host; + } + protected SocksSocket(InetAddress ip,int port,Proxy proxy){ + remoteIP = ip; + remotePort = port; + this.proxy = proxy; + this.localIP = proxy.proxySocket.getLocalAddress(); + this.localPort = proxy.proxySocket.getLocalPort(); + remoteHost = remoteIP.getHostName(); + } + + /** + * Same as Socket + */ + public void close() throws IOException{ + if(proxy!= null)proxy.endSession(); + proxy = null; + } + /** + * Same as Socket + */ + public InputStream getInputStream(){ + return proxy.in; + } + /** + * Same as Socket + */ + public OutputStream getOutputStream(){ + return proxy.out; + } + /** + * Same as Socket + */ + public int getPort(){ + return remotePort; + } + /** + * Returns remote host name, it is usefull in cases when addresses + * are resolved by proxy, and we can't create InetAddress object. + @return The name of the host this socket is connected to. + */ + public String getHost(){ + return remoteHost; + } + /** + * Get remote host as InetAddress object, might return null if + * addresses are resolved by proxy, and it is not possible to resolve + * it locally + @return Ip address of the host this socket is connected to, or null + if address was returned by the proxy as DOMAINNAME and can't be + resolved locally. + */ + public InetAddress getInetAddress(){ + if(remoteIP == null){ + try{ + remoteIP = InetAddress.getByName(remoteHost); + }catch(UnknownHostException e){ + return null; + } + } + return remoteIP; + } + + /** + * Get the port assigned by the proxy for the socket, not + * the port on locall machine as in Socket. + @return Port of the socket used on the proxy server. + */ + public int getLocalPort(){ + return localPort; + } + + /** + * Get address assigned by proxy to make a remote connection, + * it might be different from the host specified for the proxy. + * Can return null if socks server returned this address as hostname + * and it can't be resolved locally, use getLocalHost() then. + @return Address proxy is using to make a connection. + */ + public InetAddress getLocalAddress(){ + if(localIP == null){ + try{ + localIP = InetAddress.getByName(localHost); + }catch(UnknownHostException e){ + return null; + } + } + return localIP; + } + /** + Get name of the host, proxy has assigned to make a remote connection + for this socket. This method is usefull when proxy have returned + address as hostname, and we can't resolve it on this machine. + @return The name of the host proxy is using to make a connection. + */ + public String getLocalHost(){ + return localHost; + } + + /** + Same as socket. + */ + public void setSoLinger(boolean on,int val) throws SocketException{ + proxy.proxySocket.setSoLinger(on,val); + } + /** + Same as socket. + */ + public int getSoLinger(int timeout) throws SocketException{ + return proxy.proxySocket.getSoLinger(); + } + /** + Same as socket. + */ + public void setSoTimeout(int timeout) throws SocketException{ + proxy.proxySocket.setSoTimeout(timeout); + } + /** + Same as socket. + */ + public int getSoTimeout(int timeout) throws SocketException{ + return proxy.proxySocket.getSoTimeout(); + } + /** + Same as socket. + */ + public void setTcpNoDelay(boolean on) throws SocketException{ + proxy.proxySocket.setTcpNoDelay(on); + } + /** + Same as socket. + */ + public boolean getTcpNoDelay() throws SocketException{ + return proxy.proxySocket.getTcpNoDelay(); + } + + /** + Get string representation of the socket. + */ + public String toString(){ + if(directSock!=null) return "Direct connection:"+directSock; + return ("Proxy:"+proxy+";"+"addr:"+remoteHost+",port:"+remotePort + +",localport:"+localPort); + + } + +//Private Methods +////////////////// + + private void doDirect()throws SocksException{ + try{ + //System.out.println("IP:"+remoteIP+":"+remotePort); + directSock = new Socket(remoteIP,remotePort); + proxy.out = directSock.getOutputStream(); + proxy.in = directSock.getInputStream(); + proxy.proxySocket = directSock; + localIP = directSock.getLocalAddress(); + localPort = directSock.getLocalPort(); + }catch(IOException io_ex){ + throw new SocksException(Proxy.SOCKS_DIRECT_FAILED, + "Direct connect failed:"+io_ex); + } + } + +} |