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package de.blinkt.openvpn;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.InputStream;
import java.util.Vector;
import android.net.LocalSocket;
import android.util.Log;
public class OpenVpnManagementThread implements Runnable {
private static final String TAG = "openvpn";
private LocalSocket mSocket;
private VpnProfile mProfile;
private OpenVpnService mOpenVPNService;
private static Vector<OpenVpnManagementThread> active=new Vector<OpenVpnManagementThread>();
public OpenVpnManagementThread(VpnProfile profile, LocalSocket mgmtsocket, OpenVpnService openVpnService) {
mProfile = profile;
mSocket = mgmtsocket;
mOpenVPNService = openVpnService;
}
private String managmentEscape(String unescape) {
String escapedString = unescape.replace("\\", "\\\\");
escapedString = escapedString.replace("\"","\\\"");
escapedString = escapedString.replace("\n","\\n");
return '"' + escapedString + '"';
}
public void managmentCommand(String cmd) {
try {
mSocket.getOutputStream().write(cmd.getBytes());
mSocket.getOutputStream().flush();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void run() {
Log.i(TAG, "Managment Socket Thread started");
byte [] buffer =new byte[2048];
// mSocket.setSoTimeout(5); // Setting a timeout cannot be that bad
InputStream instream = null;
try {
instream = mSocket.getInputStream();
} catch (IOException e) {
e.printStackTrace();
}
String pendingInput="";
active.add(this);
try {
while(true) {
int numbytesread = instream.read(buffer);
if(numbytesread==-1)
return;
String input = new String(buffer,0,numbytesread,"UTF-8");
pendingInput += input;
pendingInput=processInput(pendingInput);
}
} catch (IOException e) {
e.printStackTrace();
}
active.remove(this);
}
private String processInput(String pendingInput) {
while(pendingInput.contains("\n")) {
String[] tokens = pendingInput.split("\\r?\\n", 2);
processCommand(tokens[0]);
if(tokens.length == 1)
// No second part, newline was at the end
pendingInput="";
else
pendingInput=tokens[1];
}
return pendingInput;
}
private void processCommand(String command) {
if (command.startsWith(">") && command.contains(":")) {
String[] parts = command.split(":",2);
String cmd = parts[0].substring(1);
String argument = parts[1];
if(cmd.equals("INFO"))
logStatusMessage(command);
else if (cmd.equals("PASSWORD")) {
processPWCommand(argument);
} else if (cmd.equals("HOLD")) {
managmentCommand("hold release\n");
} else if (cmd.equals("PROTECT-FD")) {
protectFD(argument);
}
}
Log.i(TAG, "Got unrecognized command" + command);
}
private void protectFD(String argument) {
try {
FileDescriptor[] fds = mSocket.getAncillaryFileDescriptors();
} catch (IOException e) {
e.printStackTrace();
}
}
private void processPWCommand(String argument) {
//argument has the form Need 'Private Key' password
int p1 =argument.indexOf('\'');
int p2 = argument.indexOf('\'',p1+1);
//String needed = argument.replace("Need '", "").replace("' password", "");
String needed = argument.substring(p1+1, p2);
String pw=null;
if(needed.equals("Private Key")) {
pw = mProfile.getPasswordPrivateKey();
} else if (needed.equals("Auth")) {
String usercmd = String.format("username '%s' %s\n",
needed, managmentEscape(mProfile.mUsername));
managmentCommand(usercmd);
pw = mProfile.getPasswordAuth();
}
if(pw!=null) {
String cmd = String.format("password '%s' %s\n", needed, managmentEscape(pw));
managmentCommand(cmd);
}
}
private void logStatusMessage(String command) {
OpenVPN.logMessage(0,"MGMT:", command);
}
public static void stopOpenVPN() {
for (OpenVpnManagementThread mt: active){
mt.managmentCommand("signal SIGINT\n");
}
}
}
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