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game: fix Classic/TBC SMSG_QUESTGIVER_QUEST_LIST quest title and questCount parsing

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Classic 1.12 and TBC 2.4.3 don't include questFlags(u32) + isRepeatable(u8)
before each quest title in SMSG_QUESTGIVER_QUEST_LIST. WotLK 3.3.5a added
those 5 bytes. The previous code read them speculatively for all expansions
and only rewound on empty title, which failed for any non-empty title.

Also fix questCount always reading as uint8 (all WoW versions use u8 here).
The old u32/u8 heuristic could misread 4 bytes instead of 1, misaligning all
subsequent quest item reads.
This commit is contained in:
Kelsi 2026-03-10 01:54:01 -07:00
parent 7270a4e690
commit 967cedba0e
1 changed files with 11 additions and 25 deletions
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36
src/game/game_handler.cpp
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@ -14887,21 +14887,16 @@ void GameHandler::handleQuestgiverQuestList(network::Packet& packet) {
}
(void)header;
auto readQuestCount = [&](network::Packet& pkt) -> uint32_t {
size_t rem = pkt.getSize() - pkt.getReadPos();
if (rem >= 4) {
size_t p = pkt.getReadPos();
uint32_t c = pkt.readUInt32();
if (c <= 64) return c;
pkt.setReadPos(p);
}
if (rem >= 1) {
return static_cast<uint32_t>(pkt.readUInt8());
}
return 0;
};
// questCount is uint8 in all WoW versions for SMSG_QUESTGIVER_QUEST_LIST.
uint32_t questCount = 0;
if (packet.getSize() - packet.getReadPos() >= 1) {
questCount = packet.readUInt8();
}
// Classic 1.12 and TBC 2.4.3 don't include questFlags(u32) + isRepeatable(u8)
// before the quest title. WotLK 3.3.5a added those 5 bytes.
const bool hasQuestFlagsField = !isClassicLikeExpansion() && !isActiveExpansion("tbc");
uint32_t questCount = readQuestCount(packet);
data.quests.reserve(questCount);
for (uint32_t i = 0; i < questCount; ++i) {
if (packet.getSize() - packet.getReadPos() < 12) break;
@ -14910,23 +14905,14 @@ void GameHandler::handleQuestgiverQuestList(network::Packet& packet) {
q.questIcon = packet.readUInt32();
q.questLevel = static_cast<int32_t>(packet.readUInt32());
// WotLK includes questFlags + isRepeatable; Classic variants may omit.
size_t titlePos = packet.getReadPos();
if (packet.getSize() - packet.getReadPos() >= 5) {
if (hasQuestFlagsField && packet.getSize() - packet.getReadPos() >= 5) {
q.questFlags = packet.readUInt32();
q.isRepeatable = packet.readUInt8();
q.title = normalizeWowTextTokens(packet.readString());
if (q.title.empty()) {
packet.setReadPos(titlePos);
q.questFlags = 0;
q.isRepeatable = 0;
q.title = normalizeWowTextTokens(packet.readString());
}
} else {
q.questFlags = 0;
q.isRepeatable = 0;
q.title = normalizeWowTextTokens(packet.readString());
}
q.title = normalizeWowTextTokens(packet.readString());
if (q.questId != 0) {
data.quests.push_back(std::move(q));
}