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Fix ipv6 loopback addresses being able to get connection throttled (#12155)

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Warrior 2025-04-30 17:50:18 +02:00 committed by GitHub
parent a74400d92c
commit 1e930763d2
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GPG Key ID: B5690EEEBB952194
1 changed files with 13 additions and 12 deletions
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25
paper-server/patches/sources/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java.patch
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@ -9,10 +9,10 @@
+ static final java.util.regex.Pattern HOST_PATTERN = java.util.regex.Pattern.compile("[0-9a-f\\.:]{0,45}");
+ static final java.util.regex.Pattern PROP_PATTERN = java.util.regex.Pattern.compile("\\w{0,16}");
+ // Spigot end
+ // CraftBukkit start - add fields
+ private static final java.util.HashMap<java.net.InetAddress, Long> throttleTracker = new java.util.HashMap<>();
+ // Paper start - Connection throttle
+ private static final java.util.Map<java.net.InetAddress, Long> throttleTracker = new java.util.HashMap<>();
+ private static int throttleCounter = 0;
+ // CraftBukkit end
+ // Paper end - Connection throttle
+ private static final boolean BYPASS_HOSTCHECK = Boolean.getBoolean("Paper.bypassHostCheck"); // Paper
private final MinecraftServer server;
private final Connection connection;
@ -29,7 +29,7 @@
switch (packet.intention()) {
case LOGIN:
this.beginLogin(packet, false);
@@ -50,22 +_,117 @@
@@ -50,22 +_,118 @@
default:
throw new UnsupportedOperationException("Invalid intention " + packet.intention());
}
@ -42,17 +42,18 @@
private void beginLogin(ClientIntentionPacket packet, boolean transferred) {
this.connection.setupOutboundProtocol(LoginProtocols.CLIENTBOUND);
+ // CraftBukkit start - Connection throttle
+ // Paper start - Connection throttle
+ try {
+ if (!(this.connection.channel.localAddress() instanceof io.netty.channel.unix.DomainSocketAddress)) { // Paper - Unix domain socket support; the connection throttle is useless when you have a Unix domain socket
+ final long connectionThrottle = this.server.server.getConnectionThrottle();
+ final boolean isUnixDomainSocket = this.connection.channel.localAddress() instanceof io.netty.channel.unix.DomainSocketAddress; // Paper - Unix domain socket support; the connection throttle is useless when you have a Unix domain socket
+ if (connectionThrottle > 0 && !isUnixDomainSocket && this.connection.getRemoteAddress() instanceof java.net.InetSocketAddress socketAddress && !socketAddress.isUnresolved() && !socketAddress.getAddress().isLoopbackAddress()) {
+ long currentTime = System.currentTimeMillis();
+ long connectionThrottle = this.server.server.getConnectionThrottle();
+ java.net.InetAddress address = ((java.net.InetSocketAddress) this.connection.getRemoteAddress()).getAddress();
+ java.net.InetAddress address = socketAddress.getAddress();
+
+ synchronized (ServerHandshakePacketListenerImpl.throttleTracker) {
+ if (ServerHandshakePacketListenerImpl.throttleTracker.containsKey(address) && !"127.0.0.1".equals(address.getHostAddress()) && currentTime - ServerHandshakePacketListenerImpl.throttleTracker.get(address) < connectionThrottle) {
+ if (ServerHandshakePacketListenerImpl.throttleTracker.containsKey(address) && currentTime - ServerHandshakePacketListenerImpl.throttleTracker.get(address) < connectionThrottle) {
+ ServerHandshakePacketListenerImpl.throttleTracker.put(address, currentTime);
+ Component chatmessage = io.papermc.paper.adventure.PaperAdventure.asVanilla(io.papermc.paper.configuration.GlobalConfiguration.get().messages.kick.connectionThrottle); // Paper - Configurable connection throttle kick message
+ Component chatmessage = io.papermc.paper.adventure.PaperAdventure.asVanilla(io.papermc.paper.configuration.GlobalConfiguration.get().messages.kick.connectionThrottle);
+ this.connection.send(new ClientboundLoginDisconnectPacket(chatmessage));
+ this.connection.disconnect(chatmessage);
+ return;
@ -67,11 +68,11 @@
+ ServerHandshakePacketListenerImpl.throttleTracker.values().removeIf(time -> time > connectionThrottle);
+ }
+ }
+ } // Paper - Unix domain socket support
+ }
+ } catch (Throwable t) {
+ org.apache.logging.log4j.LogManager.getLogger().debug("Failed to check connection throttle", t);
+ }
+ // CraftBukkit end
+ // Paper end - Connection throttle
if (packet.protocolVersion() != SharedConstants.getCurrentVersion().getProtocolVersion()) {
- Component component;
- if (packet.protocolVersion() < 754) {