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Code Issues 103 Projects Releases Wiki Activity

Fix connection request handler

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This commit is contained in:
RednedEpic 2023-04-08 19:01:42 -05:00
parent 05a88f7693
commit be48b83c28
3 changed files with 126 additions and 27 deletions
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26
core/src/main/java/org/geysermc/geyser/network/GeyserServerInitializer.java
View file

@ -43,32 +43,6 @@ public class GeyserServerInitializer extends BedrockServerInitializer {
this.geyser = geyser;
}
//TODO
/*
@Override
public boolean onConnectionRequest(InetSocketAddress inetSocketAddress) {
List<String> allowedProxyIPs = geyser.getConfig().getBedrock().getProxyProtocolWhitelistedIPs();
if (geyser.getConfig().getBedrock().isEnableProxyProtocol() && !allowedProxyIPs.isEmpty()) {
boolean isWhitelistedIP = false;
for (CIDRMatcher matcher : geyser.getConfig().getBedrock().getWhitelistedIPsMatchers()) {
if (matcher.matches(inetSocketAddress.getAddress())) {
isWhitelistedIP = true;
break;
}
}
if (!isWhitelistedIP) {
return false;
}
}
String ip = geyser.getConfig().isLogPlayerIpAddresses() ? inetSocketAddress.toString() : "<IP address withheld>";
geyser.getLogger().info(GeyserLocale.getLocaleStringLog("geyser.network.attempt_connect", ip));
return true;
}
*/
@Override
public void initSession(@Nonnull BedrockServerSession bedrockServerSession) {
try {

27
core/src/main/java/org/geysermc/geyser/network/netty/GeyserServer.java
View file

@ -44,6 +44,7 @@ import org.cloudburstmc.netty.handler.codec.raknet.server.RakServerOfflineHandle
import org.cloudburstmc.protocol.bedrock.BedrockPong;
import org.geysermc.geyser.GeyserImpl;
import org.geysermc.geyser.configuration.GeyserConfiguration;
import org.geysermc.geyser.network.CIDRMatcher;
import org.geysermc.geyser.network.GameProtocol;
import org.geysermc.geyser.network.GeyserServerInitializer;
import org.geysermc.geyser.ping.GeyserPingInfo;
@ -53,6 +54,7 @@ import org.geysermc.geyser.translator.text.MessageTranslator;
import java.net.InetSocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.function.IntFunction;
@ -95,7 +97,9 @@ public final class GeyserServer {
});
// Add our ping handler
this.future.channel().pipeline().addAfter(RakServerOfflineHandler.NAME, RakPingHandler.NAME, new RakPingHandler(this));
this.future.channel().pipeline()
.addFirst(RakConnectionRequestHandler.NAME, new RakConnectionRequestHandler(this))
.addAfter(RakServerOfflineHandler.NAME, RakPingHandler.NAME, new RakPingHandler(this));
return future;
}
@ -126,6 +130,27 @@ public final class GeyserServer {
.childHandler(new GeyserServerInitializer(this.geyser));
}
public boolean onConnectionRequest(InetSocketAddress inetSocketAddress) {
List<String> allowedProxyIPs = geyser.getConfig().getBedrock().getProxyProtocolWhitelistedIPs();
if (geyser.getConfig().getBedrock().isEnableProxyProtocol() && !allowedProxyIPs.isEmpty()) {
boolean isWhitelistedIP = false;
for (CIDRMatcher matcher : geyser.getConfig().getBedrock().getWhitelistedIPsMatchers()) {
if (matcher.matches(inetSocketAddress.getAddress())) {
isWhitelistedIP = true;
break;
}
}
if (!isWhitelistedIP) {
return false;
}
}
String ip = geyser.getConfig().isLogPlayerIpAddresses() ? inetSocketAddress.toString() : "<IP address withheld>";
geyser.getLogger().info(GeyserLocale.getLocaleStringLog("geyser.network.attempt_connect", ip));
return true;
}
public BedrockPong onQuery(InetSocketAddress inetSocketAddress) {
if (geyser.getConfig().isDebugMode() && PRINT_DEBUG_PINGS) {
String ip = geyser.getConfig().isLogPlayerIpAddresses() ? inetSocketAddress.toString() : "<IP address withheld>";

100
core/src/main/java/org/geysermc/geyser/network/netty/RakConnectionRequestHandler.java Normal file
View file

@ -0,0 +1,100 @@
/*
* Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @author GeyserMC
* @link https://github.com/GeyserMC/Geyser
*/
package org.geysermc.geyser.network.netty;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.socket.DatagramPacket;
import lombok.RequiredArgsConstructor;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.cloudburstmc.netty.channel.raknet.config.RakChannelOption;
import java.net.InetSocketAddress;
import static org.cloudburstmc.netty.channel.raknet.RakConstants.ID_CONNECTION_BANNED;
import static org.cloudburstmc.netty.channel.raknet.RakConstants.ID_OPEN_CONNECTION_REQUEST_1;
@ChannelHandler.Sharable
@RequiredArgsConstructor
public class RakConnectionRequestHandler extends ChannelInboundHandlerAdapter {
public static final String NAME = "rak-connection-request-handler";
private final GeyserServer server;
@Override
public void channelRead(@NonNull ChannelHandlerContext ctx, @NonNull Object msg) throws Exception {
if (!(msg instanceof DatagramPacket packet)) {
ctx.fireChannelRead(msg);
return;
}
ByteBuf buf = packet.content();
if (!buf.isReadable()) {
return; // No packet ID
}
boolean readableMagic = true;
int startIndex = buf.readerIndex();
try {
int packetId = buf.readUnsignedByte();
if (packetId == ID_OPEN_CONNECTION_REQUEST_1) {
ByteBuf magicBuf = ctx.channel().config().getOption(RakChannelOption.RAK_UNCONNECTED_MAGIC);
if (!buf.isReadable(magicBuf.readableBytes()) || !ByteBufUtil.equals(buf.readSlice(magicBuf.readableBytes()), magicBuf)) {
readableMagic = false;
}
} else {
readableMagic = false;
}
} finally {
buf.readerIndex(startIndex);
}
if (!readableMagic) {
ctx.fireChannelRead(msg);
return;
}
ByteBuf magicBuf = ctx.channel().config().getOption(RakChannelOption.RAK_UNCONNECTED_MAGIC);
long guid = ctx.channel().config().getOption(RakChannelOption.RAK_GUID);
if (!this.server.onConnectionRequest(packet.sender())) {
this.sendConnectionBanned(ctx, packet.sender(), magicBuf, guid);
} else {
ctx.fireChannelRead(msg);
}
}
private void sendConnectionBanned(ChannelHandlerContext ctx, InetSocketAddress recipient, ByteBuf magicBuf, long guid) {
ByteBuf buffer = ctx.alloc().ioBuffer(25, 25);
buffer.writeByte(ID_CONNECTION_BANNED);
buffer.writeBytes(magicBuf, magicBuf.readerIndex(), magicBuf.readableBytes());
buffer.writeLong(guid);
ctx.writeAndFlush(new DatagramPacket(buffer, recipient));
}
}