From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Noah van der Aa <ndvdaa@gmail.com>
Date: Tue, 5 Oct 2021 20:04:21 +0200
Subject: [PATCH] Add config option for logging player ip addresses


diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index fcd386c55b1c663b3080cf7a295e8a062ceade8d..61e364e95d1c8b80963d2c46366701b837107232 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -490,6 +490,11 @@ public class PaperConfig {
         }
     }
 
+    public static boolean logPlayerIpAddresses = true;
+    private static void playerIpAddresses() {
+        logPlayerIpAddresses = getBoolean("settings.log-player-ip-addresses", logPlayerIpAddresses);
+    }
+
     public static int maxJoinsPerTick;
     private static void maxJoinsPerTick() {
         maxJoinsPerTick = getInt("settings.max-joins-per-tick", 3);
diff --git a/src/main/java/net/minecraft/network/protocol/PacketUtils.java b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
index acc12307f61e1e055896b68fe16654c9c4a606a0..c958a00535c0f7a015a7a566b97e2c80fc9a0efd 100644
--- a/src/main/java/net/minecraft/network/protocol/PacketUtils.java
+++ b/src/main/java/net/minecraft/network/protocol/PacketUtils.java
@@ -58,10 +58,11 @@ public class PacketUtils {
                     // Paper start
                     catch (Exception e) {
                         Connection networkmanager = listener.getConnection();
+                        String playerIP = com.destroystokyo.paper.PaperConfig.logPlayerIpAddresses ? String.valueOf(networkmanager.getRemoteAddress()) : "<ip address withheld>"; // Paper
                         if (networkmanager.getPlayer() != null) {
-                            LOGGER.error("Error whilst processing packet {} for {}[{}]", packet, networkmanager.getPlayer().getScoreboardName(), networkmanager.getRemoteAddress(), e);
+                            LOGGER.error("Error whilst processing packet {} for {}[{}]", packet, networkmanager.getPlayer().getScoreboardName(), playerIP, e); // Paper
                         } else {
-                            LOGGER.error("Error whilst processing packet {} for connection from {}", packet, networkmanager.getRemoteAddress(), e);
+                            LOGGER.error("Error whilst processing packet {} for connection from {}", packet, playerIP, e); // Paper
                         }
                         TextComponent error = new TextComponent("Packet processing error");
                         networkmanager.send(new ClientboundDisconnectPacket(error), (future) -> {
diff --git a/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java b/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java
index 3962e82d4e4c5f792a37e825891e6960e737452d..dddc97094f0a7847b2818e6ea3b3f6cd4eb72b38 100644
--- a/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java
+++ b/src/main/java/net/minecraft/server/network/LegacyQueryHandler.java
@@ -185,7 +185,7 @@ public class LegacyQueryHandler extends ChannelInboundHandlerAdapter {
         buf.release();
         this.buf = null;
 
-        LOGGER.debug("Ping: (1.6) from {}", ctx.channel().remoteAddress());
+        LOGGER.debug("Ping: (1.6) from {}", com.destroystokyo.paper.PaperConfig.logPlayerIpAddresses ? ctx.channel().remoteAddress() : "<ip address withheld>"); // Paper
 
         InetSocketAddress virtualHost = com.destroystokyo.paper.network.PaperNetworkClient.prepareVirtualHost(host, port);
         com.destroystokyo.paper.event.server.PaperServerListPingEvent event = PaperLegacyStatusClient.processRequest(
diff --git a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
index a7046da8c097254907e01cd17f4107c8744f4a6e..43b085ee4c747a813ec5e2fa965c3369690789c5 100644
--- a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
+++ b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
@@ -204,7 +204,7 @@ public class ServerConnectionListener {
                                 throw new ReportedException(CrashReport.forThrowable(exception, "Ticking memory connection"));
                             }
 
-                            ServerConnectionListener.LOGGER.warn("Failed to handle packet for {}", networkmanager.getRemoteAddress(), exception);
+                            ServerConnectionListener.LOGGER.warn("Failed to handle packet for {}", com.destroystokyo.paper.PaperConfig.logPlayerIpAddresses ? String.valueOf(networkmanager.getRemoteAddress()) : "<ip address withheld>", exception); // Paper
                             TextComponent chatcomponenttext = new TextComponent("Internal server error");
 
                             networkmanager.send(new ClientboundDisconnectPacket(chatcomponenttext), (future) -> {
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 01fee879c946b6640da34d5890d686f0152437dc..494ca8fa8c742d4eac9fb11878d3b3170d850265 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -223,7 +223,10 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener
     }
 
     public String getUserName() {
-        return this.gameProfile != null ? this.gameProfile + " (" + this.connection.getRemoteAddress() + ")" : String.valueOf(this.connection.getRemoteAddress());
+        // Paper start
+        String ip = com.destroystokyo.paper.PaperConfig.logPlayerIpAddresses ? String.valueOf(this.connection.getRemoteAddress()) : "<ip address withheld>";
+        return this.gameProfile != null ? this.gameProfile + " (" + ip + ")" : String.valueOf(ip);
+        // Paper end
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index 99aa8f2ba2f10578f37de621d1a5a8e222cd70b1..eaa005c1c9b4386bcdbe1d6eb28c3eca7635066c 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -237,7 +237,7 @@ public abstract class PlayerList {
         String s1 = "local";
 
         if (connection.getRemoteAddress() != null) {
-            s1 = connection.getRemoteAddress().toString();
+            s1 = com.destroystokyo.paper.PaperConfig.logPlayerIpAddresses ? connection.getRemoteAddress().toString() : "<ip address withheld>"; // Paper
         }
 
         // Spigot start - spawn location event
@@ -301,7 +301,7 @@ public abstract class PlayerList {
             playerconnection.playerJoinReady = () -> {
                 postChunkLoadJoin(
                     player, finalWorldserver, connection, playerconnection,
-                    nbttagcompound, connection.getRemoteAddress().toString(), lastKnownName
+                    nbttagcompound, com.destroystokyo.paper.PaperConfig.logPlayerIpAddresses ? connection.getRemoteAddress().toString() : "<ip address withheld>", lastKnownName // Paper
                 );
             };
         });