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Yes, LinorVPN UDP (User Datagram Protocol) works by sending data packets over the internet in a fast and efficient manner. UDP is a connectionless protocol, which means that it does not establish a dedicated connection between the sender and the receiver before sending data. Instead, data packets are sent individually, and the receiving end must reassemble them into the original message.

LinorVPN uses UDP because it is faster and more efficient than TCP (Transmission Control Protocol), which is another popular protocol used for internet communication. UDP is well-suited for applications that require low latency and fast data transfer speeds, such as online gaming and video streaming.

One advantage of using LinorVPN UDP is that it can help improve the performance of your internet connection. By routing your traffic through LinorVPN's servers, you may be able to avoid congestion on your local network and improve your connection speeds. Additionally, LinorVPN encrypts your traffic, which can help protect your privacy and security online.
 
Yes, LinorVPN UDP (User Datagram Protocol) works by sending data packets over the internet in a fast and efficient manner. UDP is a connectionless protocol, which means that it does not establish a dedicated connection between the sender and the receiver before sending data. Instead, data packets are sent individually, and the receiving end must reassemble them into the original message.

LinorVPN uses UDP because it is faster and more efficient than TCP (Transmission Control Protocol), which is another popular protocol used for internet communication. UDP is well-suited for applications that require low latency and fast data transfer speeds, such as online gaming and video s†rêâmïng.

One advantage of using LinorVPN UDP is that it can help improve the performance of your internet connection. By routing your traffic through LinorVPN's servers, you may be able to avoid congestion on your local network and improve your connection speeds. Additionally, LinorVPN encrypts your traffic, which can help protect your privacy and security online.
Can you make script for UDP that has authentication password?
 
Can you make script for UDP that has authentication password?
Certainly, here is a simple Python script that uses UDP and requires an authentication password:

Code:
import socket

# Set the server address and port
server_address = ('localhost', 10000)

# Create a UDP socket and set its timeout
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.settimeout(5)

# Get the authentication password from the user
password = input("Enter authentication password: ")

# Send the password to the server
message = bytes(password, "utf-8")
sock.sendto(message, server_address)

# Wait for a response from the server
try:
    data, address = sock.recvfrom(4096)
    print(data.decode("utf-8"))
except socket.timeout:
    print("No response from server")

# Close the socket
sock.close()

This script prompts the user to enter an authentication password and sends it to the server over UDP. The server then responds with a message indicating whether the password was valid or not.

Note that this is just a basic example and you would need to implement additional security measures to ensure that the password is transmitted securely and cannot be intercepted by unauthorized users.
 
Certainly, here is a simple Python script that uses UDP and requires an authentication password:

Code:
import socket

# Set the server address and port
server_address = ('localhost', 10000)

# Create a UDP socket and set its timeout
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.settimeout(5)

# Get the authentication password from the user
password = input("Enter authentication password: ")

# Send the password to the server
message = bytes(password, "utf-8")
sock.sendto(message, server_address)

# Wait for a response from the server
try:
    data, address = sock.recvfrom(4096)
    print(data.decode("utf-8"))
except socket.timeout:
    print("No response from server")

# Close the socket
sock.close()

This script prompts the user to enter an authentication password and sends it to the server over UDP. The server then responds with a message indicating whether the password was valid or not.

Note that this is just a basic example and you would need to implement additional security measures to ensure that the password is transmitted securely and cannot be intercepted by unauthorized users.
Can you make udp server command using this script?


import android.content.Context;
import com.zi.ultrasshservice.config.SettingsConstants;
import com.zi.ultrasshservice.config.Settingsz;
import com.zi.ultrasshservice.logger.ZIStatus;
import com.zi.ultrasshservice.tunnel.TunnelManagerHelper;
import com.zi.ultrasshservice.util.securepreferences.SecurePreferences;
import com.zi.zivpn.UDPStreamGobbler;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class UdpThread extends Thread {
private String address;
private String auth;
private String ca;
Context context;
private String dir;
private String dwon;
private UDPStreamGobbler err;
private File fileConf;
private File fileDns;
private File fileca;
private String listen;
/* access modifiers changed from: private */
public final Settingsz mConfig;
private String obfs;
private UDPStreamGobbler out;
private String rc_conn;
private String rc_w;
private String retry;
private String serv;
private String server;
private Process udpProcess;
private Thread udpThread;
private String up;
public UdpThread(Context context2) {
this.context = context2;
this.dir = context2.getFilesDir().getPath();
this.mConfig = new Settingsz(context2);
}
private boolean printToFile(File file, String str) {
try {
PrintWriter printWriter = new PrintWriter(file);
printWriter.println(str);
printWriter.flush();
printWriter.close();
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public void run() {
this.fileca = new File(this.dir, "zi.ca.crt");
String privString = this.mConfig.getPrivString(SettingsConstants.UDP_SERVER);
this.serv = privString;
if (privString.isEmpty()) {
this.serv = "udpsg1.zivpn.com";
try {
SecurePreferences.Editor edit = this.mConfig.getPrefsPrivate().edit();
edit.putString(SettingsConstants.UDP_SERVER, this.serv);
edit.apply();
} catch (Exception e) {
e.printStackTrace();
}
}
InetAddress[] inetAddressArr = new InetAddress[0];
try {
inetAddressArr = InetAddress.getAllByName(this.serv);
} catch (UnknownHostException e2) {
e2.printStackTrace();
}
try {
this.address = getIPv4Addresses(inetAddressArr).getHostAddress();
} catch (Exception e3) {
e3.printStackTrace();
if (String.valueOf(e3).contains("on a null object reference")) {
ZIStatus.logInfo("<font color='red'><strong>Invalid UDP Server</strong></font>");
stopVudp();
}
}
this.server = this.address + ":20000-50000";
this.obfs = "zi";
String privString2 = this.mConfig.getPrivString(SettingsConstants.UDP_AUTH);
this.auth = privString2;
if (privString2.isEmpty()) {
this.auth = "zi";
}
String privString3 = this.mConfig.getPrivString(SettingsConstants.UDP_SPEED_UP);
this.up = privString3;
if (privString3.isEmpty()) {
this.up = "1";
}
String privString4 = this.mConfig.getPrivString(SettingsConstants.UDP_SPEED_DOWN);
this.dwon = privString4;
if (privString4.isEmpty()) {
this.dwon = "2";
}
this.retry = "3";
String privString5 = this.mConfig.getPrivString(SettingsConstants.UDP_WINDOW);
this.rc_conn = privString5;
if (privString5.isEmpty()) {
this.rc_conn = "196608";
}
try {
this.rc_w = String.valueOf((Integer.parseInt(this.rc_conn) * 5) / 2);
} catch (NumberFormatException e4) {
e4.printStackTrace();
}
this.listen = "127.0.0.1:1080";
String str = this.dir + "/zi.ca.crt";
this.ca = str;
String format = String.format("{\n \"server\": \"%s\",\n \"obfs\": \"%s\",\n \"auth_str\": \"%s\",\n \"up_mbps\": %s,\n \"down_mbps\": %s,\n \"retry\": %s,\n \"retry_interval\": 1,\n \"socks5\": {\n \"listen\": \"%s\"\n },\n \"insecure\": true,\n \"ca\": \"%s\",\n \"recv_window_conn\": %s,\n \"recv_window\": %s\n}", new Object[]{this.server, this.obfs, this.auth, this.up, this.dwon, this.retry, this.listen, str, this.rc_conn, this.rc_w});
this.fileConf = new File(this.dir, "config.json");
if (!printToFile(this.fileca, "-----BEGIN CERTIFICATE-----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\n-----END CERTIFICATE-----") || !printToFile(this.fileConf, format)) {
interrupt();
return;
}
File file = new File(this.context.getApplicationInfo().nativeLibraryDir, "libuz.so");
this.fileDns = file;
String[] strArr = {file.getAbsolutePath(), "client", "--config", this.fileConf.getAbsolutePath()};
AnonymousClass1 r1 = new UDPStreamGobbler.OnResultListener() {
public void onResult(String str) {
SecurePreferences prefsPrivate = UdpThread.this.mConfig.getPrefsPrivate();
if (str.contains("ZIVPN UDP running")) {
ZIStatus.logInfo("<font color='green'><strong>UDP Connected Successfully</strong></font>");
ZIStatus.logInfo("<font color='#FF7F27'><strong>You are ready to go</strong></font>");
} else if (str.contains("no recent network activity")) {
if (prefsPrivate.getBoolean(SettingsConstants.RECONNECT_UDP, false)) {
BugTestMainActivity.reconnectUDP(UdpThread.this.context);
ZIStatus.logInfo("<font color='red'><strong>Connection Lost retrying </strong></font>");
UdpThread.this.interrupt();
return;
}
ZIStatus.logInfo("<font color='red'><strong>UDP connection Lost</strong></font>");
UdpThread.this.stopVudp();
} else if (str.contains("Connection to server lost") || str.contains("handshake did not complete in time")) {
ZIStatus.logInfo("<font color='red'><strong>Please wait reconnecting UDP</strong></font>");
} else if (str.contains("Failed to parse client configuration")) {
ZIStatus.logInfo("<font color='red'><strong>Invalid UDP setting</strong></font>");
UdpThread.this.stopVudp();
} else if (str.contains("auth error")) {
ZIStatus.logInfo("<font color='red'><strong>Authentication failed, invalid password/expired/may logged-in on another device</strong></font>");
UdpThread.this.stopVudp();
} else if (str.contains("too many connections")) {
ZIStatus.logInfo("<font color='red'><strong>Same account on multi-device not support</strong></font>");
UdpThread.this.stopVudp();
}
}
};
try {
this.udpProcess = new ProcessBuilder(new String[0]).command(strArr).redirectErrorStream(true).start();
this.out = new UDPStreamGobbler(this.udpProcess.getInputStream(), r1);
this.err = new UDPStreamGobbler(this.udpProcess.getErrorStream(), r1);
this.out.setInterrupted(false);
this.out.start();
this.err.setInterrupted(false);
this.err.start();
this.udpProcess.waitFor();
} catch (IOException | InterruptedException e5) {
e5.printStackTrace();
}
}
public static Inet4Address getIPv4Addresses(InetAddress[] inetAddressArr) {
for (Inet4Address inet4Address : inetAddressArr) {
if (inet4Address instanceof Inet4Address) {
return inet4Address;
}
}
return null;
}
public void stopVudp() {
new Thread(new Runnable() {
public void run() {
ZIStatus.logInfo("Stopping UDP....");
UdpThread.this.interrupt();
try {
Thread.sleep(2000);
} catch (InterruptedException unused) {
}
TunnelManagerHelper.stopZIVPN(UdpThread.this.context);
}
}).start();
}
public void interrupt() {
UDPStreamGobbler uDPStreamGobbler = this.out;
if (uDPStreamGobbler != null) {
uDPStreamGobbler.setInterrupted(true);
this.out.interrupt();
this.out = null;
}
UDPStreamGobbler uDPStreamGobbler2 = this.err;
if (uDPStreamGobbler2 != null) {
uDPStreamGobbler2.setInterrupted(true);
this.err.interrupt();
this.err = null;
}
Process process = this.udpProcess;
if (process != null) {
process.destroy();
this.udpProcess = null;
}
File file = this.fileConf;
if (file != null && file.exists()) {
this.fileConf.delete();
}
super.interrupt();
}
}
 
Build udp server
To build a UDP server, you can follow these general steps:

1. Choose a programming language: You can choose any programming language that supports UDP socket programming. Popular options are Python, Java, C/C++, and Ruby.

2. Create a socket: Use the socket library to create a UDP socket that will listen to incoming data on a specific port.

3. Bind the socket: Bind the socket to a specific IP address and port to start listening for incoming UDP packets.

4. Receive data: Use the recvfrom() function to receive incoming data from the client.

5. Process data: Process the received data as per your application requirements.

6. Send response: Use the sendto() function to send a response back to the client.

7. Close the socket: Close the socket after you have finished processing the incoming data.

Here's an example Python code snippet to create a UDP server:

Python:
import socket

UDP_IP = "127.0.0.1"
UDP_PORT = 5005

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((UDP_IP, UDP_PORT))

while True:
    data, addr = sock.recvfrom(1024)
    print("received message:", data)

    # process the data here

    sock.sendto("I got your message".encode(), addr)

In this example, the server binds to IP address 127.0.0.1 and port 5005. It then listens for incoming UDP packets using a while loop. When a packet is received, it prints the message and sends a response back to the client.

Please note that this is just a sample code snippet, and you need to modify it as per your specific requirements.
 

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