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Fix query responses

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This commit is contained in:
Kieran Wallbanks 2021-04-26 19:03:03 +01:00
parent 17d584a2e3
commit c6082a35bb
2 changed files with 20 additions and 6 deletions
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22
src/main/java/net/minestom/server/extras/query/Query.java
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@ -1,12 +1,14 @@
package net.minestom.server.extras.query; package net.minestom.server.extras.query;
import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.buffer.Unpooled; import io.netty.buffer.Unpooled;
import it.unimi.dsi.fastutil.ints.Int2ObjectMap; import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
import it.unimi.dsi.fastutil.ints.Int2ObjectMaps; import it.unimi.dsi.fastutil.ints.Int2ObjectMaps;
import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap; import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
import net.minestom.server.MinecraftServer; import net.minestom.server.MinecraftServer;
import net.minestom.server.extras.query.event.BasicQueryEvent; import net.minestom.server.extras.query.event.BasicQueryEvent;
import net.minestom.server.extras.query.event.FullQueryEvent;
import net.minestom.server.extras.query.response.QueryResponse; import net.minestom.server.extras.query.response.QueryResponse;
import net.minestom.server.timer.Task; import net.minestom.server.timer.Task;
import net.minestom.server.utils.NetworkUtils; import net.minestom.server.utils.NetworkUtils;
@ -25,7 +27,7 @@ import java.nio.charset.StandardCharsets;
import java.util.Random; import java.util.Random;
/** /**
* Utility class to manage responses to the UT3 Query Protocol. * Utility class to manage responses to the GameSpy4 Query Protocol.
* @see <a href="https://wiki.vg/Query">wiki.vg</a> * @see <a href="https://wiki.vg/Query">wiki.vg</a>
*/ */
public class Query { public class Query {
@ -137,6 +139,7 @@ public class Query {
// try and receive the packet // try and receive the packet
try { try {
System.out.println("WAITING");
socket.receive(packet); socket.receive(packet);
} catch (IOException e) { } catch (IOException e) {
if (!started) { if (!started) {
@ -152,11 +155,14 @@ public class Query {
// check the magic field // check the magic field
if (data.readUnsignedShort() != 0xFEFD) { if (data.readUnsignedShort() != 0xFEFD) {
System.out.println("UNKNOWN");
continue; continue;
} }
// now check the query type // now check the query type
byte type = data.readByte(); byte type = data.readByte();
System.out.println("READ " + type);
if (type == 9) { // handshake if (type == 9) { // handshake
int sessionID = data.readInt(); int sessionID = data.readInt();
int challengeToken = RANDOM.nextInt(); int challengeToken = RANDOM.nextInt();
@ -180,16 +186,20 @@ public class Query {
int challengeToken = data.readInt(); int challengeToken = data.readInt();
SocketAddress sender = packet.getSocketAddress(); SocketAddress sender = packet.getSocketAddress();
System.out.println(" STAT");
if (CHALLENGE_TOKENS.containsKey(challengeToken) && CHALLENGE_TOKENS.get(challengeToken).equals(sender)) { if (CHALLENGE_TOKENS.containsKey(challengeToken) && CHALLENGE_TOKENS.get(challengeToken).equals(sender)) {
int remaining = data.readableBytes(); int remaining = data.readableBytes();
System.out.println(" REMAINING " + remaining);
if (remaining == 0) { // basic if (remaining == 0) { // basic
BasicQueryEvent event = new BasicQueryEvent(sender); BasicQueryEvent event = new BasicQueryEvent(sender);
MinecraftServer.getGlobalEventHandler().callCancellableEvent(BasicQueryEvent.class, event, MinecraftServer.getGlobalEventHandler().callCancellableEvent(BasicQueryEvent.class, event,
() -> sendResponse(event.getQueryResponse(), sessionID, sender)); () -> sendResponse(event.getQueryResponse(), sessionID, sender));
} else if (remaining == 8) { // full } else if (remaining == 5) { // full
BasicQueryEvent event = new BasicQueryEvent(sender); FullQueryEvent event = new FullQueryEvent(sender);
MinecraftServer.getGlobalEventHandler().callCancellableEvent(BasicQueryEvent.class, event, MinecraftServer.getGlobalEventHandler().callCancellableEvent(FullQueryEvent.class, event,
() -> sendResponse(event.getQueryResponse(), sessionID, sender)); () -> sendResponse(event.getQueryResponse(), sessionID, sender));
} }
} }
@ -210,6 +220,10 @@ public class Query {
byte[] responseData = response.toByteArray(); byte[] responseData = response.toByteArray();
try { try {
socket.send(new DatagramPacket(responseData, responseData.length, sender)); socket.send(new DatagramPacket(responseData, responseData.length, sender));
System.out.println(ByteBufUtil.hexDump(responseData));
System.out.println("SENT!! basic=" + (queryResponse instanceof BasicQueryEvent));
} catch (IOException e) { } catch (IOException e) {
LOGGER.error("An error occurred whilst sending a query handshake packet.", e); LOGGER.error("An error occurred whilst sending a query handshake packet.", e);
} }

4
src/main/java/net/minestom/server/extras/query/response/FullQueryResponse.java
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@ -139,7 +139,7 @@ public class FullQueryResponse implements QueryResponse {
@Override @Override
public void write(@NotNull BinaryWriter writer) { public void write(@NotNull BinaryWriter writer) {
writer.writeBytes(PADDING_10); writer.writeBytes(PADDING_11);
// key-values // key-values
for (Map.Entry<String, String> entry : this.kv.entrySet()) { for (Map.Entry<String, String> entry : this.kv.entrySet()) {
@ -148,7 +148,7 @@ public class FullQueryResponse implements QueryResponse {
} }
writer.writeNullTerminatedString("", Query.CHARSET); writer.writeNullTerminatedString("", Query.CHARSET);
writer.writeBytes(PADDING_11); writer.writeBytes(PADDING_10);
// players // players
for (String player : this.players) { for (String player : this.players) {