Dereku/LegacyPing
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Autorecovery on failure

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Dereku 2024-09-14 20:30:44 +07:00
parent 6729de5894
commit 9f0ba79d91
2 changed files with 58 additions and 38 deletions
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2
pom.xml
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@ -6,7 +6,7 @@
<groupId>net.rubeta</groupId>
<artifactId>LegacyPing</artifactId>
<version>1.5</version>
<version>1.6</version>
<packaging>jar</packaging>
<name>LegacyPing</name>

94
src/main/java/net/rubeta/legacyping/ServerThread.java
View file

@ -13,26 +13,26 @@ public class ServerThread extends Thread {
private static final String MODERN_RESPONSE =
"{\"version\": {\"name\": \"%version%\",\"protocol\": %protocol%}," +
"\"players\": {\"max\": %max%,\"online\": %now%}," +
"\"description\": {\"text\": \"%motd%\"}," +
"\"enforcesSecureChat\": false,\"previewsChat\": true}";
"\"players\": {\"max\": %max%,\"online\": %now%}," +
"\"description\": {\"text\": \"%motd%\"}," +
"\"enforcesSecureChat\": false,\"previewsChat\": true}";
private static final String DISCONNECT_REASON = "[\"\",{\"text\":\"This is b1.7.3 server. Visit \"}," +
"{\"text\":\"https://rubeta.net\",\"underlined\":true},{\"text\":\" for more information.\"}]";
private final ServerSocket serverSocket;
private final AtomicBoolean working = new AtomicBoolean(false);
private final Server minecraftServer;
private final String version;
private final int protocol;
private final InetAddress address;
private final int port;
private ServerSocket serverSocket;
public ServerThread(final Server server, final String host, int port, String version, int protocol) throws IOException {
this.minecraftServer = server;
this.setName("LegacyPing thread listening " + host + ":" + port);
this.version = version;
this.protocol = protocol;
final InetAddress address = InetAddress.getByName(host);
this.serverSocket = new ServerSocket(port, 10, address);
this.serverSocket.setSoTimeout((int) TimeUnit.SECONDS.toMillis(10L));
this.serverSocket.setPerformancePreferences(0, 2, 1);
this.address = InetAddress.getByName(host);
this.port = port;
}
public ServerThread(final String host, int port) throws IOException {
@ -40,10 +40,8 @@ public class ServerThread extends Thread {
this.setName("LegacyPing thread listening " + host + ":" + port);
this.version = "dummy";
this.protocol = 0;
final InetAddress address = InetAddress.getByName(host);
this.serverSocket = new ServerSocket(port, 10, address);
this.serverSocket.setSoTimeout((int) TimeUnit.SECONDS.toMillis(10L));
this.serverSocket.setPerformancePreferences(0, 2, 1);
this.address = InetAddress.getByName(host);
this.port = port;
}
public static void main(String[] args) throws IOException {
@ -54,33 +52,48 @@ public class ServerThread extends Thread {
@Override
public void run() {
this.working.set(true);
while (this.working.get() && !this.serverSocket.isClosed()) {
try (final Socket socket = this.serverSocket.accept();
final DataInputStream inputStream = new DataInputStream(socket.getInputStream());
final DataOutputStream outputStream = new DataOutputStream(socket.getOutputStream())) {
socket.setTrafficClass(SocketOptions.TCP_NODELAY & SocketOptions.IP_TOS);
while (this.working.get()) {
try {
this.serverSocket = new ServerSocket(port, 10, address);
this.serverSocket.setSoTimeout((int) TimeUnit.SECONDS.toMillis(10L));
this.serverSocket.setPerformancePreferences(0, 2, 1);
} catch (IOException e) {
System.out.println("Failed to start ServerSocket: " + e);
this.pause();
continue;
}
final int packetLength = inputStream.readByte() | inputStream.readByte() << 1; // idk why it doesn't a VarInt
final int protocolVersion = this.readVarInt(inputStream);
final String hostname = this.readUtf(inputStream);
final int port = inputStream.readShort();
final int status = this.readVarInt(inputStream);
while (!this.serverSocket.isClosed()) {
if (!this.working.get()) {
break;
}
try (final Socket socket = this.serverSocket.accept()) {
final DataInputStream inputStream = new DataInputStream(socket.getInputStream());
final DataOutputStream outputStream = new DataOutputStream(socket.getOutputStream());
socket.setTrafficClass(SocketOptions.TCP_NODELAY & SocketOptions.IP_TOS);
final int packetLength = inputStream.readByte() | inputStream.readByte() << 1; // idk why it doesn't a VarInt
final int protocolVersion = this.readVarInt(inputStream);
final String hostname = this.readUtf(inputStream);
final int port = inputStream.readShort();
final int status = this.readVarInt(inputStream);
// System.out.println(packetLength + "; Protocol version: " + protocolVersion + ", host: " + hostname
// + ", port: " + port + ", status: " + status);
if (status != 2) {
this.responseForModernPing(outputStream, MODERN_RESPONSE);
} else {
this.responseForModernPing(outputStream, DISCONNECT_REASON);
}
outputStream.flush();
if (status != 2) {
this.responseForModernPing(outputStream, MODERN_RESPONSE);
} else {
this.responseForModernPing(outputStream, DISCONNECT_REASON);
}
outputStream.flush();
inputStream.readShort(); // legacy data
this.writeVarInt(outputStream, this.readVarInt(inputStream)); // Packet length (9)
this.writeVarInt(outputStream, this.readVarInt(inputStream)); // Packet id (1)
outputStream.writeLong(inputStream.readLong()); // timestamp
} catch (SocketTimeoutException | EOFException ignore) {
} catch (IOException ex) {
System.out.println("Exception caught: " + ex);
inputStream.readShort(); // legacy data
this.writeVarInt(outputStream, this.readVarInt(inputStream)); // Packet length (9)
this.writeVarInt(outputStream, this.readVarInt(inputStream)); // Packet id (1)
outputStream.writeLong(inputStream.readLong()); // timestamp
} catch (SocketTimeoutException | EOFException ignore) {
} catch (Exception ex) {
System.out.println("Exception caught: " + ex);
}
}
}
}
@ -93,6 +106,13 @@ public class ServerThread extends Thread {
}
}
void pause() {
try {
Thread.sleep(TimeUnit.SECONDS.toMillis(30L));
} catch (InterruptedException ignored) {
}
}
private void responseForModernPing(final DataOutputStream outputStream, String response) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
@ -131,12 +151,12 @@ public class ServerThread extends Thread {
if (j > 5) {
throw new RuntimeException("VarInt too big");
}
} while((b0 & 128) == 128);
} while ((b0 & 128) == 128);
return i;
}
private void writeVarInt(DataOutputStream out, int paramInt) throws IOException {
while((paramInt & 0xffffff80) != 0) {
while ((paramInt & 0xffffff80) != 0) {
out.writeByte(paramInt & 0x7f | 0x80);
paramInt >>>= 7;
}