private Connection getConnection(
String servername,
int serverport,
String proxyhost,
int proxyport,
String proxyusername,
String proxypassword) {
/* Create a connection instance */
Connection connect = new Connection(servername, serverport);
/* We want to connect through a HTTP proxy */
if (usehttpproxy) {
connect.setProxyData(new HTTPProxyData(proxyhost, proxyport));
/* Now connect */
// if the proxy requires basic authentication:
if (useBasicAuthentication) {
connect.setProxyData(new HTTPProxyData(proxyhost, proxyport, proxyusername, proxypassword));
}
}
return connect;
}
public boolean connect() {
// try {
//
// connection.setCompression(true);
// connection.setTCPNoDelay(true);
//
// } catch (IOException e) {
// Log.e(TAG, "Could not enable compression!", e);
// }
// initialize the upstream proxy
if (profile.isUpstreamProxy()) {
try {
if (profile.getUpstreamProxy() == null || profile.getUpstreamProxy().equals(""))
throw new Exception();
String[] proxyInfo = profile.getUpstreamProxy().split("@");
if (proxyInfo.length == 1) {
String[] hostInfo = proxyInfo[0].split(":");
if (hostInfo.length != 2) throw new Exception();
proxyData = new HTTPProxyData(hostInfo[0], Integer.valueOf(hostInfo[1]));
} else if (proxyInfo.length == 2) {
String[] userInfo = proxyInfo[0].split(":");
if (userInfo.length != 2) throw new Exception();
String[] hostInfo = proxyInfo[1].split(":");
if (hostInfo.length != 2) throw new Exception();
proxyData =
new HTTPProxyData(
hostInfo[0], Integer.valueOf(hostInfo[1]), userInfo[0], userInfo[1]);
} else {
throw new Exception();
}
} catch (Exception e) {
if (reason == null) reason = getString(R.string.upstream_format_error);
return false;
}
}
// get the host ip address
if (proxyData != null) {
try {
hostAddress = InetAddress.getByName(proxyData.proxyHost).getHostAddress();
} catch (UnknownHostException e) {
hostAddress = null;
}
} else {
try {
hostAddress = InetAddress.getByName(profile.getHost()).getHostAddress();
} catch (UnknownHostException e) {
hostAddress = null;
}
}
// fail to connect if the dns lookup failed
if (hostAddress == null) {
if (reason == null) reason = getString(R.string.fail_to_connect);
return false;
}
// begin to connect
try {
connection = new Connection(profile.getHost(), profile.getPort());
if (proxyData != null) connection.setProxyData(proxyData);
connection.addConnectionMonitor(this);
/*
* Uncomment when debugging SSH protocol:
*/
/*
* DebugLogger logger = new DebugLogger() {
*
* public void log(int level, String className, String message) {
* Log.d("SSH", message); }
*
* };
*
* Logger.enabled = true; Logger.logger = logger;
*/
connection.connect(this, 10 * 1000, 20 * 1000);
connected = true;
} catch (Exception e) {
Log.e(TAG, "Problem in SSH connection thread during connecting", e);
// Display the reason in the text.
if (reason == null) reason = getString(R.string.fail_to_connect);
return false;
}
try {
// enter a loop to keep trying until authentication
int tries = 0;
while (connected && !connection.isAuthenticationComplete() && tries++ < AUTH_TRIES) {
authenticate();
// sleep to make sure we dont kill system
Thread.sleep(1000);
}
} catch (Exception e) {
Log.e(TAG, "Problem in SSH connection thread during authentication", e);
if (reason == null) reason = getString(R.string.fail_to_authenticate);
return false;
}
try {
if (connection.isAuthenticationComplete()) {
return enablePortForward();
}
} catch (Exception e) {
Log.e(TAG, "Problem in SSH connection thread during enabling port", e);
if (reason == null) reason = getString(R.string.fail_to_connect);
return false;
}
if (reason == null) reason = getString(R.string.fail_to_authenticate);
Log.e(TAG, "Cannot authenticate");
return false;
}