Files
LCE-Revelations/Minecraft.World/CustomPayloadPacket.h
itsRevela 463bf2b93f fix: player list no longer limited by render distance
The previous IQNet cleanup in handleRemoveEntity fired on every entity
despawn, which happens both when a player goes out of tracking range
and when they disconnect.  This caused players to vanish from the Tab
list whenever they moved beyond render distance.

Introduce two custom payload channels (MC|ForkHello, MC|ForkPLeave) so
the client can distinguish "out of range" from "actually left":

- Server sends MC|ForkHello during login to identify itself as a fork
- Server sends MC|ForkPLeave with the player's gamertag on disconnect
- Client skips IQNet cleanup in handleRemoveEntity on fork servers
- Client cleans up IQNet only when MC|ForkPLeave arrives

Fully backwards-compatible: no existing packet wire formats changed.
Upstream clients ignore the unknown channels, fork clients on upstream
servers fall back to the old entity-tracking-based cleanup.
2026-04-01 16:01:56 -05:00

49 lines
1.9 KiB
C++

#pragma once
using namespace std;
#include "Packet.h"
class CustomPayloadPacket : public Packet, public enable_shared_from_this<CustomPayloadPacket>
{
public:
// Mojang-defined custom packets
static const wstring CUSTOM_BOOK_PACKET;
static const wstring CUSTOM_BOOK_SIGN_PACKET;
static const wstring TEXTURE_PACK_PACKET;
static const wstring TRADER_LIST_PACKET;
static const wstring TRADER_SELECTION_PACKET;
static const wstring SET_ADVENTURE_COMMAND_PACKET;
static const wstring SET_BEACON_PACKET;
static const wstring SET_ITEM_NAME_PACKET;
// Security: stream cipher handshake channels
static const wstring CIPHER_KEY_CHANNEL; // server->client: carries 32-byte key (16 AES key + 16 IV)
static const wstring CIPHER_ACK_CHANNEL; // client->server: ack (empty payload)
static const wstring CIPHER_ON_CHANNEL; // server->client: activation signal (empty payload)
// Security: identity token channels
static const wstring IDENTITY_TOKEN_ISSUE; // server->client: issue new 32-byte token
static const wstring IDENTITY_TOKEN_CHALLENGE; // server->client: request stored token
static const wstring IDENTITY_TOKEN_RESPONSE; // client->server: present stored token
// Fork extensions: server capability and player lifecycle
static const wstring FORK_HELLO_CHANNEL; // server->client: identifies fork server (empty payload)
static const wstring FORK_PLAYER_LEAVE_CHANNEL; // server->client: player disconnected (payload: UTF gamertag)
wstring identifier;
int length;
byteArray data;
CustomPayloadPacket();
CustomPayloadPacket(const wstring &identifier, byteArray data);
virtual void read(DataInputStream *dis);
virtual void write(DataOutputStream *dos);
virtual void handle(PacketListener *listener);
virtual int getEstimatedSize();
public:
static shared_ptr<Packet> create() { return std::make_shared<CustomPayloadPacket>(); }
virtual int getId() { return 250; }
};