private Callable<String> createPingTask(final OkHttpClient client, final String host, int port) {
final HttpUrl pingPongUrl =
new HttpUrl.Builder()
.scheme(requestUrl.scheme())
.host(host)
.port(port)
.addPathSegment("webman")
.addPathSegment("pingpong.cgi")
.addQueryParameter("action", "cors")
.build();
return new Callable<String>() {
@Override
public String call() throws Exception {
Request request = new Request.Builder().url(pingPongUrl).build();
Response response = client.newCall(request).execute();
InputStream in = response.body().byteStream();
JsonReader reader = null;
try {
reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
PingPongJson pingPongJson = gson.fromJson(reader, PingPongJson.class);
if (pingPongJson != null && pingPongJson.success) {
return host;
}
} finally {
if (reader != null) {
reader.close();
}
}
return null;
}
};
}
public RelayCookie resolve(String serverID, String id) throws IOException {
if (!Util.isQuickConnectId(serverID)) {
throw new IllegalArgumentException("serverID isn't a Quick Connect ID");
}
RelayManager relayManager = (RelayManager) RelayHandler.getDefault();
RelayCookie cookie = relayManager.get(serverID);
if (cookie == null) {
cookie = new RelayCookie.Builder().serverID(serverID).id(id).build();
relayManager.put(serverID, cookie);
}
HttpUrl serverUrl = HttpUrl.parse("http://global.quickconnect.to/Serv.php");
ServerInfoJson infoJson = getServerInfo(serverUrl, serverID, id);
// ping DSM directly
HttpUrl resolvedUrl = pingDSM(infoJson);
if (resolvedUrl != null) {
cookie = cookie.newBuilder().resolvedUrl(resolvedUrl).build();
return cookie;
}
// ping DSM through tunnel
resolvedUrl = pingTunnel(infoJson.service);
if (resolvedUrl != null) {
cookie = cookie.newBuilder().resolvedUrl(resolvedUrl).build();
return cookie;
}
// request tunnel
infoJson = requestTunnel(infoJson, serverID, id);
if (infoJson != null) {
resolvedUrl =
requestUrl
.newBuilder()
.host(infoJson.service.relay_ip)
.port(infoJson.service.relay_port)
.build();
cookie = cookie.newBuilder().resolvedUrl(resolvedUrl).build();
return cookie;
}
throw new IOException("No valid url resolved");
}
public ServerInfoJson requestTunnel(ServerInfoJson infoJson, String serverID, String id)
throws IOException {
if (infoJson == null || infoJson.env == null || Util.isEmpty(infoJson.env.control_host)) {
return null;
}
// set timeout to 30 seconds
OkHttpClient client =
defaultClient
.newBuilder()
.connectTimeout(30, TimeUnit.SECONDS)
.readTimeout(30, TimeUnit.SECONDS)
.build();
final String server = infoJson.env.control_host;
JsonObject jsonObject = new JsonObject();
jsonObject.addProperty("command", "request_tunnel");
jsonObject.addProperty("version", 1);
jsonObject.addProperty("serverID", serverID);
jsonObject.addProperty("id", id);
RequestBody requestBody =
RequestBody.create(MediaType.parse("text/plain"), gson.toJson(jsonObject));
Request request =
new Request.Builder()
.url(HttpUrl.parse("http://" + server + "/Serv.php"))
.post(requestBody)
.build();
Response response = client.newCall(request).execute();
JsonReader reader = null;
try {
InputStream in = response.body().byteStream();
reader = new JsonReader(new InputStreamReader(in, "UTF-8"));
return gson.fromJson(reader, ServerInfoJson.class);
} finally {
if (reader != null) {
reader.close();
}
}
}
private HttpUrl pingTunnel(ServiceJson serviceJson) {
if (serviceJson == null || Util.isEmpty(serviceJson.relay_ip) || serviceJson.relay_port == 0) {
return null;
}
// set timeout to 10 seconds
OkHttpClient client =
defaultClient
.newBuilder()
.connectTimeout(5, TimeUnit.SECONDS)
.readTimeout(5, TimeUnit.SECONDS)
.build();
String relayIp = serviceJson.relay_ip;
int relayPort = serviceJson.relay_port;
// tunnel address
ExecutorService executor = Executors.newFixedThreadPool(10);
CompletionService<String> service = new ExecutorCompletionService<>(executor);
service.submit(createPingTask(client, relayIp, relayPort));
try {
Future<String> future = service.take();
if (future != null) {
String host = future.get();
if (!Util.isEmpty(host)) {
return requestUrl.newBuilder().host(host).port(relayPort).build();
}
}
} catch (InterruptedException | ExecutionException ignored) {
}
// shutdown executors
executor.shutdownNow();
return null;
}
public HttpUrl pingDSM(ServerInfoJson infoJson) {
// set timeout to 5 seconds
final OkHttpClient client =
defaultClient
.newBuilder()
.connectTimeout(5, TimeUnit.SECONDS)
.readTimeout(5, TimeUnit.SECONDS)
.build();
ServerJson serverJson = infoJson.server;
if (serverJson == null) {
throw new IllegalArgumentException("serverJson == null");
}
ServiceJson serviceJson = infoJson.service;
if (serviceJson == null) {
throw new IllegalArgumentException("serviceJson == null");
}
int port = serviceJson.port;
int externalPort = serviceJson.ext_port;
// internal address(192.168.x.x/10.x.x.x)
ExecutorService executor = Executors.newFixedThreadPool(10);
CompletionService<String> internalService = new ExecutorCompletionService<>(executor);
List<InterfaceJson> ifaces = serverJson._interface;
AtomicInteger internalCount = new AtomicInteger(0);
if (ifaces != null) {
for (final InterfaceJson iface : ifaces) {
internalService.submit(createPingTask(client, iface.ip, port));
internalCount.incrementAndGet();
if (iface.ipv6 != null) {
for (Ipv6Json ipv6 : iface.ipv6) {
String ipv6Address = "[" + ipv6.address + "]";
internalService.submit(createPingTask(client, ipv6Address, port));
internalCount.incrementAndGet();
}
}
}
}
// host address(ddns/fqdn)
ExecutorCompletionService<String> hostService = new ExecutorCompletionService<>(executor);
AtomicInteger hostCount = new AtomicInteger(0);
// ddns
if (!Util.isEmpty(serverJson.ddns) && !serverJson.ddns.equals("NULL")) {
hostService.submit(createPingTask(client, serverJson.ddns, port));
hostCount.incrementAndGet();
}
// fqdn
if (!Util.isEmpty(serverJson.fqdn) && !serverJson.fqdn.equals("NULL")) {
hostService.submit(createPingTask(client, serverJson.fqdn, port));
hostCount.incrementAndGet();
}
// external address(public ip address)
ExecutorCompletionService<String> externalService = new ExecutorCompletionService<>(executor);
AtomicInteger externalCount = new AtomicInteger(0);
if (serverJson.external != null) {
String ip = serverJson.external.ip;
if (!Util.isEmpty(ip)) {
externalService.submit(
createPingTask(client, ip, (externalPort != 0) ? externalPort : port));
externalCount.incrementAndGet();
}
String ipv6 = serverJson.external.ipv6;
if (!Util.isEmpty(ipv6) && !ipv6.equals("::")) {
externalService.submit(
createPingTask(client, "[" + ipv6 + "]", (externalPort != 0) ? externalPort : port));
externalCount.incrementAndGet();
}
}
while (internalCount.getAndDecrement() > 0) {
try {
Future<String> future = internalService.take();
if (future != null) {
String host = future.get();
if (!Util.isEmpty(host)) {
return requestUrl.newBuilder().host(host).port(port).build();
}
}
} catch (InterruptedException | ExecutionException ignored) {
}
}
while (hostCount.getAndDecrement() > 0) {
try {
Future<String> future = hostService.take();
if (future != null) {
String host = future.get();
if (!Util.isEmpty(host)) {
return requestUrl.newBuilder().host(host).port(port).build();
}
}
} catch (InterruptedException | ExecutionException ignored) {
}
}
while (externalCount.getAndDecrement() > 0) {
try {
Future<String> future = externalService.take();
if (future != null) {
String host = future.get();
if (!Util.isEmpty(host)) {
return requestUrl.newBuilder().host(host).port(port).build();
}
}
} catch (InterruptedException | ExecutionException ignored) {
// ignored.printStackTrace();
}
}
// shutdown executors
executor.shutdownNow();
return null;
}