phaneron/Kelsidavis-WoWee
1
0
Fork 0
mirror of https://github.com/Kelsidavis/WoWee.git synced 2026-03-22 23:30:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 3

fix: optimize turtle monster move wrapped parsing

Browse source
This commit is contained in:
Kelsi 2026-03-14 22:01:26 -07:00
parent bce1f4d211
commit f44ef7b9ea
2 changed files with 44 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

49
src/game/game_handler.cpp
View file

@ -16290,6 +16290,22 @@ void GameHandler::handleMonsterMove(network::Packet& packet) {
LOG_WARNING(msg, " (occurrence=", failCount, ")");
}
};
auto logWrappedFallbackUsed = [&]() {
static uint32_t wrappedFallbackCount = 0;
++wrappedFallbackCount;
if (wrappedFallbackCount <= 10 || (wrappedFallbackCount % 100) == 0) {
LOG_WARNING("SMSG_MONSTER_MOVE parsed via wrapped-subpacket fallback",
" (occurrence=", wrappedFallbackCount, ")");
}
};
auto logWrappedUncompressedFallbackUsed = [&]() {
static uint32_t wrappedUncompressedFallbackCount = 0;
++wrappedUncompressedFallbackCount;
if (wrappedUncompressedFallbackCount <= 10 || (wrappedUncompressedFallbackCount % 100) == 0) {
LOG_WARNING("SMSG_MONSTER_MOVE parsed via uncompressed wrapped-subpacket fallback",
" (occurrence=", wrappedUncompressedFallbackCount, ")");
}
};
auto stripWrappedSubpacket = [&](const std::vector<uint8_t>& bytes, std::vector<uint8_t>& stripped) -> bool {
if (bytes.size() < 3) return false;
uint8_t subSize = bytes[0];
@ -16331,22 +16347,31 @@ void GameHandler::handleMonsterMove(network::Packet& packet) {
std::vector<uint8_t> stripped;
bool hasWrappedForm = stripWrappedSubpacket(decompressed, stripped);
// Try unwrapped payload first (common form), then wrapped-subpacket fallback.
network::Packet decompPacket(packet.getOpcode(), decompressed);
if (!packetParsers_->parseMonsterMove(decompPacket, data)) {
if (!hasWrappedForm) {
logMonsterMoveParseFailure("Failed to parse SMSG_MONSTER_MOVE (decompressed " +
std::to_string(destLen) + " bytes)");
return;
}
bool parsed = false;
if (hasWrappedForm) {
network::Packet wrappedPacket(packet.getOpcode(), stripped);
if (!packetParsers_->parseMonsterMove(wrappedPacket, data)) {
if (packetParsers_->parseMonsterMove(wrappedPacket, data)) {
parsed = true;
logWrappedFallbackUsed();
}
}
if (!parsed) {
network::Packet decompPacket(packet.getOpcode(), decompressed);
if (packetParsers_->parseMonsterMove(decompPacket, data)) {
parsed = true;
}
}
if (!parsed) {
if (hasWrappedForm) {
logMonsterMoveParseFailure("Failed to parse SMSG_MONSTER_MOVE (decompressed " +
std::to_string(destLen) + " bytes, wrapped payload " +
std::to_string(stripped.size()) + " bytes)");
return;
} else {
logMonsterMoveParseFailure("Failed to parse SMSG_MONSTER_MOVE (decompressed " +
std::to_string(destLen) + " bytes)");
}
LOG_WARNING("SMSG_MONSTER_MOVE parsed via wrapped-subpacket fallback");
return;
}
} else if (!packetParsers_->parseMonsterMove(packet, data)) {
// Some realms occasionally embed an extra [size|opcode] wrapper even when the
@ -16355,7 +16380,7 @@ void GameHandler::handleMonsterMove(network::Packet& packet) {
if (stripWrappedSubpacket(rawData, stripped)) {
network::Packet wrappedPacket(packet.getOpcode(), stripped);
if (packetParsers_->parseMonsterMove(wrappedPacket, data)) {
LOG_WARNING("SMSG_MONSTER_MOVE parsed via uncompressed wrapped-subpacket fallback");
logWrappedUncompressedFallbackUsed();
} else {
logMonsterMoveParseFailure("Failed to parse SMSG_MONSTER_MOVE");
return;

19
src/game/world_packets.cpp
View file

@ -3172,10 +3172,12 @@ bool MonsterMoveParser::parse(network::Packet& packet, MonsterMoveData& data) {
if (pointCount == 0) return true;
// Reject extreme point counts from malformed packets.
// Cap pointCount to prevent excessive iteration from malformed packets.
constexpr uint32_t kMaxSplinePoints = 1000;
if (pointCount > kMaxSplinePoints) {
return false;
LOG_WARNING("SMSG_MONSTER_MOVE: pointCount=", pointCount, " exceeds max ", kMaxSplinePoints,
" (guid=0x", std::hex, data.guid, std::dec, "), capping");
pointCount = kMaxSplinePoints;
}
// Catmullrom or Flying → all waypoints stored as absolute float3 (uncompressed).
@ -3183,27 +3185,20 @@ bool MonsterMoveParser::parse(network::Packet& packet, MonsterMoveData& data) {
bool uncompressed = (data.splineFlags & (0x00080000 | 0x00002000)) != 0;
if (uncompressed) {
const size_t requiredBytes = static_cast<size_t>(pointCount) * 12ull;
if (packet.getReadPos() + requiredBytes > packet.getSize()) return false;
// Read last point as destination
// Skip to last point: each point is 12 bytes
for (uint32_t i = 0; i < pointCount - 1; i++) {
if (packet.getReadPos() + 12 > packet.getSize()) return false;
if (packet.getReadPos() + 12 > packet.getSize()) return true;
packet.readFloat(); packet.readFloat(); packet.readFloat();
}
if (packet.getReadPos() + 12 > packet.getSize()) return false;
if (packet.getReadPos() + 12 > packet.getSize()) return true;
data.destX = packet.readFloat();
data.destY = packet.readFloat();
data.destZ = packet.readFloat();
data.hasDest = true;
} else {
// Compressed: first 3 floats are the destination (final point)
size_t requiredBytes = 12;
if (pointCount > 1) {
requiredBytes += static_cast<size_t>(pointCount - 1) * 4ull;
}
if (packet.getReadPos() + requiredBytes > packet.getSize()) return false;
if (packet.getReadPos() + 12 > packet.getSize()) return true;
data.destX = packet.readFloat();
data.destY = packet.readFloat();
data.destZ = packet.readFloat();