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fix(combatlog): validate packed dispel-family GUIDs

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Kelsi 2026-03-14 01:10:43 -07:00
parent bd8c46fa49
commit dbdc45a8a9
1 changed files with 36 additions and 24 deletions
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60
src/game/game_handler.cpp
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@ -100,6 +100,22 @@ bool envFlagEnabled(const char* key, bool defaultValue = false) {
raw[0] == 'n' || raw[0] == 'N');
}
bool hasFullPackedGuid(const network::Packet& packet) {
if (packet.getReadPos() >= packet.getSize()) {
return false;
}
const auto& rawData = packet.getData();
const uint8_t mask = rawData[packet.getReadPos()];
size_t guidBytes = 1;
for (int bit = 0; bit < 8; ++bit) {
if ((mask & (1u << bit)) != 0) {
++guidBytes;
}
}
return packet.getSize() - packet.getReadPos() >= guidBytes;
}
std::string formatCopperAmount(uint32_t amount) {
uint32_t gold = amount / 10000;
uint32_t silver = (amount / 100) % 100;
@ -3254,9 +3270,13 @@ void GameHandler::handlePacket(network::Packet& packet) {
} else {
if (packet.getSize() - packet.getReadPos() < 4) break;
dispelSpellId = packet.readUInt32();
if (packet.getSize() - packet.getReadPos() < 1) break;
if (!hasFullPackedGuid(packet)) {
packet.setReadPos(packet.getSize()); break;
}
dispelCasterGuid = UpdateObjectParser::readPackedGuid(packet);
if (packet.getSize() - packet.getReadPos() < 1) break;
if (!hasFullPackedGuid(packet)) {
packet.setReadPos(packet.getSize()); break;
}
/*uint64_t victim =*/ UpdateObjectParser::readPackedGuid(packet);
}
// Only show failure to the player who attempted the dispel
@ -6208,12 +6228,16 @@ void GameHandler::handlePacket(network::Packet& packet) {
// TBC: full uint64 casterGuid + full uint64 victimGuid + ...
// + uint32 count + count × (uint32 dispelled_spellId + uint32 unk)
const bool dispelUsesFullGuid = isActiveExpansion("tbc");
if (packet.getSize() - packet.getReadPos() < (dispelUsesFullGuid ? 8u : 1u)) {
if (packet.getSize() - packet.getReadPos() < (dispelUsesFullGuid ? 8u : 1u)
|| (!dispelUsesFullGuid && !hasFullPackedGuid(packet))) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t casterGuid = dispelUsesFullGuid
? packet.readUInt64() : UpdateObjectParser::readPackedGuid(packet);
if (packet.getSize() - packet.getReadPos() < (dispelUsesFullGuid ? 8u : 1u)) break;
if (packet.getSize() - packet.getReadPos() < (dispelUsesFullGuid ? 8u : 1u)
|| (!dispelUsesFullGuid && !hasFullPackedGuid(packet))) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t victimGuid = dispelUsesFullGuid
? packet.readUInt64() : UpdateObjectParser::readPackedGuid(packet);
if (packet.getSize() - packet.getReadPos() < 9) break;
@ -6294,12 +6318,14 @@ void GameHandler::handlePacket(network::Packet& packet) {
// + count × (uint32 stolenSpellId + uint8 isPositive)
// TBC: full uint64 victim + full uint64 caster + same tail
const bool stealUsesFullGuid = isActiveExpansion("tbc");
if (packet.getSize() - packet.getReadPos() < (stealUsesFullGuid ? 8u : 1u)) {
if (packet.getSize() - packet.getReadPos() < (stealUsesFullGuid ? 8u : 1u)
|| (!stealUsesFullGuid && !hasFullPackedGuid(packet))) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t stealVictim = stealUsesFullGuid
? packet.readUInt64() : UpdateObjectParser::readPackedGuid(packet);
if (packet.getSize() - packet.getReadPos() < (stealUsesFullGuid ? 8u : 1u)) {
if (packet.getSize() - packet.getReadPos() < (stealUsesFullGuid ? 8u : 1u)
|| (!stealUsesFullGuid && !hasFullPackedGuid(packet))) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t stealCaster = stealUsesFullGuid
@ -6420,24 +6446,10 @@ void GameHandler::handlePacket(network::Packet& packet) {
// Effect 49 = FEED_PET: uint32 itemEntry
// Effect 114= CREATE_ITEM2: uint32 itemEntry (same layout as CREATE_ITEM)
const bool exeUsesFullGuid = isActiveExpansion("tbc");
const auto hasFullPackedGuid = [&packet]() -> bool {
if (packet.getReadPos() >= packet.getSize()) {
return false;
}
const auto& rawData = packet.getData();
const uint8_t mask = rawData[packet.getReadPos()];
size_t guidBytes = 1;
for (int bit = 0; bit < 8; ++bit) {
if ((mask & (1u << bit)) != 0) {
++guidBytes;
}
}
return packet.getSize() - packet.getReadPos() >= guidBytes;
};
if (packet.getSize() - packet.getReadPos() < (exeUsesFullGuid ? 8u : 1u)) {
packet.setReadPos(packet.getSize()); break;
}
if (!exeUsesFullGuid && !hasFullPackedGuid()) {
if (!exeUsesFullGuid && !hasFullPackedGuid(packet)) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t exeCaster = exeUsesFullGuid
@ -6459,7 +6471,7 @@ void GameHandler::handlePacket(network::Packet& packet) {
// SPELL_EFFECT_POWER_DRAIN: packed_guid target + uint32 amount + uint32 powerType + float multiplier
for (uint32_t li = 0; li < effectLogCount; ++li) {
if (packet.getSize() - packet.getReadPos() < (exeUsesFullGuid ? 8u : 1u)
|| (!exeUsesFullGuid && !hasFullPackedGuid())) {
|| (!exeUsesFullGuid && !hasFullPackedGuid(packet))) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t drainTarget = exeUsesFullGuid
@ -6497,7 +6509,7 @@ void GameHandler::handlePacket(network::Packet& packet) {
// SPELL_EFFECT_HEALTH_LEECH: packed_guid target + uint32 amount + float multiplier
for (uint32_t li = 0; li < effectLogCount; ++li) {
if (packet.getSize() - packet.getReadPos() < (exeUsesFullGuid ? 8u : 1u)
|| (!exeUsesFullGuid && !hasFullPackedGuid())) {
|| (!exeUsesFullGuid && !hasFullPackedGuid(packet))) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t leechTarget = exeUsesFullGuid
@ -6552,7 +6564,7 @@ void GameHandler::handlePacket(network::Packet& packet) {
// SPELL_EFFECT_INTERRUPT_CAST: packed_guid target + uint32 interrupted_spell_id
for (uint32_t li = 0; li < effectLogCount; ++li) {
if (packet.getSize() - packet.getReadPos() < (exeUsesFullGuid ? 8u : 1u)
|| (!exeUsesFullGuid && !hasFullPackedGuid())) {
|| (!exeUsesFullGuid && !hasFullPackedGuid(packet))) {
packet.setReadPos(packet.getSize()); break;
}
uint64_t icTarget = exeUsesFullGuid