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fix: optimize turtle monster move wrapped parsing

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Kelsi 2026-03-14 22:01:26 -07:00
parent bce1f4d211
commit f44ef7b9ea
2 changed files with 44 additions and 24 deletions
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19
src/game/world_packets.cpp
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@ -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();