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game: fix SMSG_SPELL_FAILURE GUID format for TBC/Classic vs WotLK

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WotLK uses packed GUIDs in SMSG_SPELL_FAILURE / SMSG_SPELL_FAILED_OTHER.
TBC 2.4.3 and Classic 1.12 use full uint64 GUIDs. The previous fix used
UpdateObjectParser::readPackedGuid for all expansions, which would
mis-parse the caster GUID on TBC/Classic servers, leaving stale cast
bars and potentially corrupting subsequent packet reads.

Now checks isClassicLikeExpansion() || isActiveExpansion("tbc") and
reads a raw uint64 for those expansions, matching the TBC/Classic wire
format used in parseSpellStart/parseSpellGo overrides.
This commit is contained in:
Kelsi 2026-03-09 23:20:15 -07:00
parent 640eaacb8c
commit d72912714b
1 changed files with 12 additions and 4 deletions
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16
src/game/game_handler.cpp
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@ -1780,8 +1780,12 @@ void GameHandler::handlePacket(network::Packet& packet) {
// ---- Spell failed on another unit ----
case Opcode::SMSG_SPELL_FAILED_OTHER: {
// packed_guid + uint8 castCount + uint32 spellId + uint8 reason
uint64_t failOtherGuid = UpdateObjectParser::readPackedGuid(packet);
// WotLK: packed_guid + uint8 castCount + uint32 spellId + uint8 reason
// TBC/Classic: full uint64 + uint8 castCount + uint32 spellId + uint8 reason
const bool tbcLike2 = isClassicLikeExpansion() || isActiveExpansion("tbc");
uint64_t failOtherGuid = tbcLike2
? (packet.getSize() - packet.getReadPos() >= 8 ? packet.readUInt64() : 0)
: UpdateObjectParser::readPackedGuid(packet);
if (failOtherGuid != 0 && failOtherGuid != playerGuid) {
unitCastStates_.erase(failOtherGuid);
}
@ -2532,8 +2536,12 @@ void GameHandler::handlePacket(network::Packet& packet) {
handleSpellGo(packet);
break;
case Opcode::SMSG_SPELL_FAILURE: {
// packed_guid caster + uint8 castCount + uint32 spellId + uint8 failReason
uint64_t failGuid = UpdateObjectParser::readPackedGuid(packet);
// WotLK: packed_guid + uint8 castCount + uint32 spellId + uint8 failReason
// TBC/Classic: full uint64 + uint8 castCount + uint32 spellId + uint8 failReason
const bool tbcOrClassic = isClassicLikeExpansion() || isActiveExpansion("tbc");
uint64_t failGuid = tbcOrClassic
? (packet.getSize() - packet.getReadPos() >= 8 ? packet.readUInt64() : 0)
: UpdateObjectParser::readPackedGuid(packet);
if (failGuid == playerGuid || failGuid == 0) {
// Player's own cast failed
casting = false;