@Override
public void run() {
byte[] buffer = new byte[128];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length, mAddress, NETBIOS_UDP_PORT),
query =
new DatagramPacket(
NETBIOS_REQUEST, NETBIOS_REQUEST.length, mAddress, NETBIOS_UDP_PORT);
String name, address = mAddress.getHostAddress();
Target target;
for (int i = 0; i < MAX_RETRIES; i++) {
try {
mSocket.send(query);
mSocket.receive(packet);
byte[] data = packet.getData();
if (data != null && data.length >= 74) {
String response = new String(data, "ASCII");
// i know this is horrible, but i really need only the netbios name
name = response.substring(57, 73).trim();
Logger.debug(address + " was resolved to " + name);
// update netbios cache
mArpReader.addNetBiosName(address, name);
// existing target
target = System.getTargetByAddress(address);
if (target != null) {
target.setAlias(name);
sendEndpointUpdateNotification();
}
break;
}
} catch (SocketTimeoutException ste) {
// swallow timeout error
} catch (IOException e) {
System.errorLogging(e);
} finally {
try {
// send again a query
mSocket.send(query);
} catch (Exception e) {
// swallow error
}
}
}
mSocket.close();
}
@Override
public void run() {
Logger.debug("ArpReader started ...");
mNetBiosMap.clear();
mStopped = false;
String iface = "";
ArrayList<Target> foundTargets = new ArrayList<Target>();
try {
iface = System.getNetwork().getInterface().getDisplayName();
} catch (Exception e) {
System.errorLogging(e);
}
while (!mStopped) {
try {
BufferedReader reader = new BufferedReader(new FileReader(ARP_TABLE_FILE));
String line = null, name = null;
Matcher matcher = null;
Endpoint endpoint = null;
Target target = null;
Network network = System.getNetwork();
foundTargets.clear();
while ((line = reader.readLine()) != null) {
if ((matcher = ARP_TABLE_PARSER.matcher(line)) != null && matcher.find()) {
String address = matcher.group(1),
// hwtype = matcher.group( 2 ),
flags = matcher.group(3),
hwaddr = matcher.group(4),
// mask = matcher.group( 5 ),
device = matcher.group(6);
if (device.equals(iface)
&& !hwaddr.equals("00:00:00:00:00:00")
&& flags.contains("2")) {
endpoint = new Endpoint(address, hwaddr);
target = new Target(endpoint);
foundTargets.add(target);
// rescanning the gateway could cause an issue when the gateway itself has multiple
// interfaces ( LAN, WAN ... )
if (!endpoint.getAddress().equals(network.getGatewayAddress())
&& !endpoint.getAddress().equals(network.getLocalAddress())) {
synchronized (mNetBiosMap) {
name = mNetBiosMap.get(address);
}
if (name == null) {
try {
mExecutor.execute(new NBResolver(address));
} catch (RejectedExecutionException e) {
// ignore since this is happening because the executor was shut down.
} catch (OutOfMemoryError m) {
// wait until the thread queue gets freed
break;
}
if (!target.isRouter()) {
// attempt DNS resolution
name = endpoint.getAddress().getHostName();
if (!name.equals(address)) {
Logger.debug(address + " was DNS resolved to " + name);
synchronized (mNetBiosMap) {
mNetBiosMap.put(address, name);
}
} else name = null;
}
}
if (!System.hasTarget(target)) sendNewEndpointNotification(endpoint, name);
else if (name != null) {
target = System.getTargetByAddress(address);
if (target != null && !target.hasAlias()) {
target.setAlias(name);
sendEndpointUpdateNotification();
}
}
}
}
}
}
reader.close();
boolean update = false;
boolean found;
int i;
Target[] currentTargets =
System.getTargets().toArray(new Target[System.getTargets().size()]);
for (Target t : currentTargets) {
endpoint = t.getEndpoint();
if (endpoint == null) continue;
for (found = false, i = 0; i < foundTargets.size() && !found; i++) {
if (endpoint.equals(foundTargets.get(i).getEndpoint())) found = true;
}
if (t.isConnected() != found
&& !t.isRouter()
&& !t.getAddress().equals(network.getLocalAddress())) {
t.setConneced(found);
update = true;
}
}
if (update) sendEndpointUpdateNotification();
Thread.sleep(500);
} catch (Exception e) {
System.errorLogging(e);
String msg = e.getMessage();
if (msg != null && msg.contains("EMFILE")) {
try {
Shell.exec(
"lsof | grep " + android.os.Process.myPid(),
new Shell.OutputReceiver() {
@Override
public void onStart(String command) {}
@Override
public void onNewLine(String line) {
Logger.debug(line);
}
@Override
public void onEnd(int exitCode) {}
});
} catch (Exception e1) {
System.errorLogging(e1);
}
}
}
}
}