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37cc8445623200ee2b0d32031a45528d84c0aa55
DarkflameServer/dNet/WorldPackets.cpp
Aaron Kimbrell ebcfd54915 fix: tell the player when the zone they go to gets no instance 
The master server dropped a transfer request it started no instance
for, so the world server never heard back and the player waited. It
now answers the request with an empty address and the reason in place
of the port: no room for another instance (max_instances), a zone that
is not in the ZoneTable, or another reason. A request for a private
zone that does not exist is answered the same way.

The world server passes this on as a TRANSFER_TO_WORLD without an
address, which the client shows as a failed map change, and leaves the
character where it is. The auth server fails the login when there is
no character select to send the player to.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
2026-11-10 16:28:34 -06:00

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#include "WorldPackets.h"
#include "ClientPackets.h"
#include "dCommonVars.h"
#include "Logger.h"
#include <algorithm>
namespace {
// Copies every unread bit of from into to.
bool ReadRest(RakNet::BitStream& from, RakNet::BitStream& to) {
to.Reset();
return from.Read(to, from.GetNumberOfUnreadBits());
}
void WriteAll(RakNet::BitStream& to, const RakNet::BitStream& from) {
auto& nonConst = const_cast<RakNet::BitStream&>(from); // GetData is not const in RakNet
to.WriteBits(nonConst.GetData(), nonConst.GetNumberOfBitsUsed(), false);
}
}
namespace WorldPackets {
bool SendIfTransferFailed(const SystemAddress& sysAddr, const std::string& serverIP, const uint32_t serverPort) {
if (!serverIP.empty()) return false;
LOG("No instance to transfer %s to (reason %u)", sysAddr.ToString(), serverPort);
// The client reads the port of a transfer without an address as the reason and tells the player
ClientPackets::TransferToWorld transfer;
transfer.serverPort = static_cast<uint16_t>(serverPort);
transfer.Send(sysAddr);
return true;
}
void Validation::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(username);
bitStream.Write(sessionKey);
bitStream.Write(fdbChecksum);
}
bool Validation::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(username));
// sometimes client puts a null terminator at the end of the checksum and sometimes doesn't, weird
VALIDATE_READ(bitStream.Read(sessionKey));
VALIDATE_READ(bitStream.Read(fdbChecksum));
return true;
}
void CharacterCreateRequest::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(name);
bitStream.Write(firstNameIndex);
bitStream.Write(middleNameIndex);
bitStream.Write(lastNameIndex);
for (const auto byte : unknown) bitStream.Write(byte);
bitStream.Write(shirtColor);
bitStream.Write(shirtStyle);
bitStream.Write(pantsColor);
bitStream.Write(hairStyle);
bitStream.Write(hairColor);
bitStream.Write(leftHand);
bitStream.Write(rightHand);
bitStream.Write(eyebrows);
bitStream.Write(eyes);
bitStream.Write(mouth);
}
bool CharacterCreateRequest::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(name));
VALIDATE_READ(bitStream.Read(firstNameIndex));
VALIDATE_READ(bitStream.Read(middleNameIndex));
VALIDATE_READ(bitStream.Read(lastNameIndex));
for (auto& byte : unknown) VALIDATE_READ(bitStream.Read(byte));
VALIDATE_READ(bitStream.Read(shirtColor));
VALIDATE_READ(bitStream.Read(shirtStyle));
VALIDATE_READ(bitStream.Read(pantsColor));
VALIDATE_READ(bitStream.Read(hairStyle));
VALIDATE_READ(bitStream.Read(hairColor));
VALIDATE_READ(bitStream.Read(leftHand));
VALIDATE_READ(bitStream.Read(rightHand));
VALIDATE_READ(bitStream.Read(eyebrows));
VALIDATE_READ(bitStream.Read(eyes));
VALIDATE_READ(bitStream.Read(mouth));
return true;
}
void CharacterLoginRequest::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(playerID);
}
bool CharacterLoginRequest::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(playerID));
return true;
}
void GameMessage::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(objectID);
bitStream.Write(messageID);
WriteAll(bitStream, data);
}
bool GameMessage::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(objectID));
VALIDATE_READ(bitStream.Read(messageID));
VALIDATE_READ(ReadRest(bitStream, data));
return true;
}
void CharacterDeleteRequest::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(objectID);
}
bool CharacterDeleteRequest::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(objectID));
return true;
}
void CharacterRenameRequest::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(objectID);
bitStream.Write(name);
}
bool CharacterRenameRequest::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(objectID));
VALIDATE_READ(bitStream.Read(name));
return true;
}
void LevelLoadComplete::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(mapID);
bitStream.Write(instanceID);
bitStream.Write(cloneID);
}
bool LevelLoadComplete::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(mapID));
VALIDATE_READ(bitStream.Read(instanceID));
VALIDATE_READ(bitStream.Read(cloneID));
return true;
}
void PositionUpdate::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(update.position.x);
bitStream.Write(update.position.y);
bitStream.Write(update.position.z);
bitStream.Write(update.rotation.x);
bitStream.Write(update.rotation.y);
bitStream.Write(update.rotation.z);
bitStream.Write(update.rotation.w);
bitStream.Write(update.onGround);
bitStream.Write(update.onRail);
bitStream.Write(hasVelocity);
if (hasVelocity) {
bitStream.Write(update.velocity.x);
bitStream.Write(update.velocity.y);
bitStream.Write(update.velocity.z);
}
bitStream.Write(hasAngularVelocity);
if (hasAngularVelocity) {
bitStream.Write(update.angularVelocity.x);
bitStream.Write(update.angularVelocity.y);
bitStream.Write(update.angularVelocity.z);
}
bitStream.Write(hasLocalSpaceInfo);
if (hasLocalSpaceInfo) {
bitStream.Write(update.localSpaceInfo.objectId);
bitStream.Write(update.localSpaceInfo.position.x);
bitStream.Write(update.localSpaceInfo.position.y);
bitStream.Write(update.localSpaceInfo.position.z);
bitStream.Write(hasLinearVelocity);
if (hasLinearVelocity) {
bitStream.Write(update.localSpaceInfo.linearVelocity.x);
bitStream.Write(update.localSpaceInfo.linearVelocity.y);
bitStream.Write(update.localSpaceInfo.linearVelocity.z);
}
}
bitStream.Write(hasRemoteInputInfo);
if (hasRemoteInputInfo) {
bitStream.Write(update.remoteInputInfo.m_RemoteInputX);
bitStream.Write(update.remoteInputInfo.m_RemoteInputY);
bitStream.Write(update.remoteInputInfo.m_IsPowersliding);
bitStream.Write(update.remoteInputInfo.m_IsModified);
}
}
bool PositionUpdate::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(update.position.x));
VALIDATE_READ(bitStream.Read(update.position.y));
VALIDATE_READ(bitStream.Read(update.position.z));
VALIDATE_READ(bitStream.Read(update.rotation.x));
VALIDATE_READ(bitStream.Read(update.rotation.y));
VALIDATE_READ(bitStream.Read(update.rotation.z));
VALIDATE_READ(bitStream.Read(update.rotation.w));
VALIDATE_READ(bitStream.Read(update.onGround));
VALIDATE_READ(bitStream.Read(update.onRail));
VALIDATE_READ(bitStream.Read(hasVelocity));
if (hasVelocity) {
VALIDATE_READ(bitStream.Read(update.velocity.x));
VALIDATE_READ(bitStream.Read(update.velocity.y));
VALIDATE_READ(bitStream.Read(update.velocity.z));
}
VALIDATE_READ(bitStream.Read(hasAngularVelocity));
if (hasAngularVelocity) {
VALIDATE_READ(bitStream.Read(update.angularVelocity.x));
VALIDATE_READ(bitStream.Read(update.angularVelocity.y));
VALIDATE_READ(bitStream.Read(update.angularVelocity.z));
}
// The last two sections may be missing entirely (DLU has always accepted that)
hasLocalSpaceInfo = false;
hasLinearVelocity = false;
if (bitStream.Read(hasLocalSpaceInfo) && hasLocalSpaceInfo) {
VALIDATE_READ(bitStream.Read(update.localSpaceInfo.objectId));
VALIDATE_READ(bitStream.Read(update.localSpaceInfo.position.x));
VALIDATE_READ(bitStream.Read(update.localSpaceInfo.position.y));
VALIDATE_READ(bitStream.Read(update.localSpaceInfo.position.z));
if (bitStream.Read(hasLinearVelocity) && hasLinearVelocity) {
VALIDATE_READ(bitStream.Read(update.localSpaceInfo.linearVelocity.x));
VALIDATE_READ(bitStream.Read(update.localSpaceInfo.linearVelocity.y));
VALIDATE_READ(bitStream.Read(update.localSpaceInfo.linearVelocity.z));
}
}
hasRemoteInputInfo = false;
if (bitStream.Read(hasRemoteInputInfo) && hasRemoteInputInfo) {
VALIDATE_READ(bitStream.Read(update.remoteInputInfo.m_RemoteInputX));
VALIDATE_READ(bitStream.Read(update.remoteInputInfo.m_RemoteInputY));
VALIDATE_READ(bitStream.Read(update.remoteInputInfo.m_IsPowersliding));
VALIDATE_READ(bitStream.Read(update.remoteInputInfo.m_IsModified));
}
return true;
}
void TmpGuildCreate::Serialize(RakNet::BitStream& bitStream) const {
auto name = guildName;
if (name.size() >= NAME_SIZE) name.resize(NAME_SIZE - 1);
bitStream.Write(LUWString(name, NAME_SIZE));
}
bool TmpGuildCreate::Deserialize(RakNet::BitStream& bitStream) {
LUWString name(NAME_SIZE);
VALIDATE_READ(bitStream.Read(name));
guildName = name.string;
return true;
}
void MailPacket::Serialize(RakNet::BitStream& bitStream) const {
WriteAll(bitStream, data);
}
bool MailPacket::Deserialize(RakNet::BitStream& bitStream) {
return ReadRest(bitStream, data);
}
void RoutePacket::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(size);
bitStream.Write(routedService);
bitStream.Write(routedMessageID);
bitStream.Write(padding);
for (const auto byte : routedData) bitStream.Write(byte);
}
bool RoutePacket::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(size));
VALIDATE_READ(bitStream.Read(routedService));
VALIDATE_READ(bitStream.Read(routedMessageID));
VALIDATE_READ(bitStream.Read(padding));
routedData.resize(BITS_TO_BYTES(bitStream.GetNumberOfUnreadBits()));
if (!routedData.empty()) VALIDATE_READ(bitStream.ReadBits(routedData.data(), BYTES_TO_BITS(routedData.size()), true));
return true;
}
ChatPackets::RoutedFromClient RoutePacket::ToChat(const LWOOBJID senderID) const {
constexpr size_t ROUTED_DATA_SKIP = 4;
ChatPackets::RoutedFromClient routed(static_cast<uint8_t>(routedMessageID & 0xFF));
routed.senderID = senderID;
for (size_t i = ROUTED_DATA_SKIP; i - ROUTED_DATA_SKIP < size && i < routedData.size(); ++i) {
routed.data.push_back(routedData[i]);
}
return routed;
}
void StringCheck::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(chatLevel);
bitStream.Write(requestID);
auto fixedReceiver = receiver;
fixedReceiver.resize(42);
bitStream.Write(fixedReceiver);
bitStream.Write<uint16_t>(message.size());
bitStream.Write(message);
}
bool StringCheck::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(chatLevel));
VALIDATE_READ(bitStream.Read(requestID));
receiver.resize(42);
VALIDATE_READ(bitStream.ReadBits(reinterpret_cast<unsigned char*>(receiver.data()), BYTES_TO_BITS(receiver.size() * sizeof(char16_t)), true));
VALIDATE_READ(BitStreamUtils::ReadLengthPrefixed<uint16_t>(bitStream, message));
return true;
}
std::string StringCheck::GetNarrowReceiver() const {
std::string narrow;
for (const auto character : receiver) narrow.push_back(static_cast<uint8_t>(character));
if (!narrow.empty()) {
if (std::string(narrow.c_str(), 4) == "[GM]") { // Shift the string forward if we are speaking to a GM as the client appends "[GM]" if they are
narrow = std::string(narrow.c_str() + 4, narrow.size() - 4);
}
}
return narrow;
}
std::string StringCheck::GetNarrowMessage() const {
std::string narrow;
for (const auto character : message) narrow.push_back(static_cast<uint8_t>(character));
return narrow;
}
void GeneralChatMessage::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(chatChannel);
bitStream.Write(unknown);
bitStream.Write<int32_t>(message.size() + 1);
bitStream.Write(message);
bitStream.Write<char16_t>(u'\0');
}
bool GeneralChatMessage::Deserialize(RakNet::BitStream& bitStream) {
int32_t messageLength{};
VALIDATE_READ(bitStream.Read(chatChannel));
VALIDATE_READ(bitStream.Read(unknown));
VALIDATE_READ(bitStream.Read(messageLength));
if (messageLength < 0 || static_cast<uint32_t>(messageLength) > MAX_MESSAGE_LENGTH) return false;
message.clear();
for (int32_t i = 0; i < (messageLength - 1); ++i) {
char16_t character;
VALIDATE_READ(bitStream.Read(character));
message.push_back(character);
}
// The null terminator the count includes; DLU never needed it
if (messageLength > 0) bitStream.IgnoreBits(std::min<BitSize_t>(bitStream.GetNumberOfUnreadBits(), BYTES_TO_BITS(sizeof(char16_t))));
return true;
}
void HandleFunness::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(cheatInfo);
bitStream.Write(cheatType);
}
bool HandleFunness::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(cheatInfo));
VALIDATE_READ(bitStream.Read(cheatType));
return true;
}
void RequestUgcManifestInfo::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(blueprintId);
bitStream.Write(resourceType);
}
bool RequestUgcManifestInfo::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(blueprintId));
VALIDATE_READ(bitStream.Read(resourceType));
return true;
}
void UgcDownloadFailed::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(resType);
bitStream.Write(blueprintId);
bitStream.Write(statusCode);
bitStream.Write(charId);
}
bool UgcDownloadFailed::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(resType));
VALIDATE_READ(bitStream.Read(blueprintId));
VALIDATE_READ(bitStream.Read(statusCode));
VALIDATE_READ(bitStream.Read(charId));
return true;
}
void UIHelpTop5::Serialize(RakNet::BitStream& bitStream) const {
bitStream.Write(language);
}
bool UIHelpTop5::Deserialize(RakNet::BitStream& bitStream) {
VALIDATE_READ(bitStream.Read(language));
return true;
}
}
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