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Files

Houmgaor d27da5ec86 fix(items): stop G-rank Workshop/Cog softlock on missing ACK

MSG_MHF_GET_EXTRA_INFO (0xA6) and MSG_MHF_GET_COG_INFO (0xC3) had
Parse() returning NOT IMPLEMENTED. The dispatch loop treats any Parse
error as a hard drop — no ACK is ever sent, so the client waits
indefinitely and effectively soft-locks when entering the G-rank
Workshop or Master Felyne (Cog) screens.

Fix: parse AckHandle (the only field we can confirm from the protocol)
and respond with doAckBufFail so the client receives a well-formed
buf-type ACK with error code 1. The client's fail branch for these
requests exits cleanly without reading response fields, avoiding the
read-past-EOF crash that an empty success ACK would cause.

The full response format for both packets is still unknown; a complete
implementation requires further RE. The TODO comments mark the gap.

Fixes #180.

2026-03-19 14:35:38 +01:00

7.7 KiB

Raw Blame History

Unimplemented Handlers

Tracks channel server handlers that are empty stubs. Regenerate by searching the source:

# All unimplemented game features
grep -rn "// stub: unimplemented" server/channelserver/handlers_*.go

# All reserved protocol slots
grep -rn "// stub: reserved" server/channelserver/handlers_reserve.go

All empty handlers carry an inline comment — // stub: unimplemented for real game features, // stub: reserved for protocol message IDs that MHF itself never uses.

Unimplemented (68 handlers)

Grouped by handler file / game subsystem.

Achievements (`handlers_achievement.go`)

Handler	Notes
`handleMsgMhfResetAchievement`	Resets achievement progress for a character
`handleMsgMhfPaymentAchievement`	Achievement reward payout (currency/items)
`handleMsgMhfGetCaAchievementHist`	Fetch CA (cross-platform?) achievement history
`handleMsgMhfSetCaAchievement`	Set CA achievement state

Caravan (`handlers_caravan.go`)

Handler	Notes
`handleMsgMhfPostRyoudama`	Post/submit Ryoudama (Caravan jewel) data

Cast Binary (`handlers_cast_binary.go`)

Handler	Notes
`handleMsgSysCastedBinary`	Relay of already-cast binary state (complement to `MsgSysCastBinary`)

Client Management (`handlers_clients.go`)

Handler	Notes
`handleMsgMhfShutClient`	Server-initiated client disconnect
`handleMsgSysHideClient`	Hide a client session from the session list

Data / Auth (`handlers_data.go`)

Handler	Notes
`handleMsgSysAuthData`	Supplemental auth data exchange

Events (`handlers_event.go`)

Handler	Notes
`handleMsgMhfGetRestrictionEvent`	Fetch event-based gameplay restrictions

Guild (`handlers_guild.go`)

Handler	Notes
`handleMsgMhfUpdateForceGuildRank`	Force-set a guild's rank (admin/GM operation)
`handleMsgMhfUpdateGuild`	Update generic guild metadata
`handleMsgMhfUpdateGuildcard`	Update guild card display data

House / My Room (`handlers_house.go`)

Handler	Notes
`handleMsgMhfResetTitle`	Reset a character's displayed title

Items (`handlers_items.go`)

Handler	Notes
`handleMsgMhfStampcardPrize`	Claim a stamp card prize

Misc (`handlers_misc.go`)

Handler	Notes
`handleMsgMhfKickExportForce`	Force-kick a character from an export/transfer
`handleMsgMhfRegistSpabiTime`	Register Spabi (practice area?) usage time
`handleMsgMhfDebugPostValue`	Debug value submission (client-side debug tool)
`handleMsgMhfGetDailyMissionMaster`	Fetch daily mission master data (template list)
`handleMsgMhfGetDailyMissionPersonal`	Fetch character's daily mission progress
`handleMsgMhfSetDailyMissionPersonal`	Save character's daily mission progress
`handleMsgMhfUseUdShopCoin`	Spend a UD Shop coin

Mutex (`handlers_mutex.go`)

All five mutex handlers are empty. MHF mutexes are distributed locks used for event coordination (Raviente, etc.). The server currently uses its own semaphore system instead.

Handler	Notes
`handleMsgSysCreateMutex`	Create a named distributed mutex
`handleMsgSysCreateOpenMutex`	Create and immediately open a mutex
`handleMsgSysOpenMutex`	Acquire an existing mutex
`handleMsgSysCloseMutex`	Release a mutex
`handleMsgSysDeleteMutex`	Destroy a mutex

Object Sync (`handlers_object.go`)

Object sync is partially implemented (create, position, binary set/notify work). The following secondary operations are stubs:

Handler	Notes
`handleMsgSysDeleteObject`	Delete a stage object
`handleMsgSysRotateObject`	Broadcast object rotation
`handleMsgSysDuplicateObject`	Duplicate a stage object
`handleMsgSysGetObjectBinary`	Fetch binary state of a specific object
`handleMsgSysGetObjectOwner`	Get the owning session of an object
`handleMsgSysUpdateObjectBinary`	Update object binary state
`handleMsgSysCleanupObject`	Clean up stale object state
`handleMsgSysAddObject`	Add an object to the stage
`handleMsgSysDelObject`	Remove an object from the stage
`handleMsgSysDispObject`	Display/show a previously hidden object
`handleMsgSysHideObject`	Hide an object from other clients

Quests (`handlers_quest.go`)

Handler	Notes
`handleMsgMhfEnterTournamentQuest`	Enter a tournament-mode quest

Register (`handlers_register.go`)

Handler	Notes
`handleMsgSysNotifyRegister`	Notify server of a client-side registration event

Rewards (`handlers_reward.go`)

Handler	Notes
`handleMsgMhfUseRewardSong`	Use/activate a reward song buff
`handleMsgMhfAddRewardSongCount`	Increment reward song usage counter
`handleMsgMhfAcceptReadReward`	Claim a reward for reading an in-game notice

Session (`handlers_session.go`)

Some of these may be intentionally no-ops (e.g. MsgSysAck is a client-to-server confirmation that needs no reply). Others are genuine feature gaps.

Handler	Notes
`handleMsgHead`	Raw packet header handler (likely intentional no-op)
`handleMsgSysAck`	Client acknowledgement — no server reply expected
`handleMsgSysSetStatus`	Set session/character status flags
`handleMsgSysEcho`	Protocol echo/ping (no reply needed)
`handleMsgSysUpdateRight`	Update client rights/entitlements
`handleMsgSysAuthQuery`	Auth capability query
`handleMsgSysAuthTerminal`	Terminate auth session
`handleMsgSysTransBinary`	Transfer binary data between clients
`handleMsgSysCollectBinary`	Collect binary data from clients
`handleMsgSysGetState`	Get session state snapshot
`handleMsgSysSerialize`	Serialize session data
`handleMsgSysEnumlobby`	Enumerate available lobbies
`handleMsgSysEnumuser`	Enumerate users in context
`handleMsgSysInfokyserver`	Fetch key server info
`handleMsgCaExchangeItem`	CA (cross-platform) item exchange
`handleMsgMhfServerCommand`	Server-push command to client
`handleMsgMhfSetLoginwindow`	Configure client login window state
`handleMsgMhfGetCaUniqueID`	Fetch CA unique identifier

Stage (`handlers_stage.go`)

Handler	Notes
`handleMsgSysStageDestruct`	Destroy/teardown a stage
`handleMsgSysLeaveStage`	Client leaving a stage (complement to `handleMsgSysEnterStage`)

Tactics / UD (`handlers_tactics.go`)

Handler	Notes
`handleMsgMhfSetUdTacticsFollower`	Set UD (Unlimited?) Tactics follower data
`handleMsgMhfGetUdTacticsLog`	Fetch UD Tactics combat log

Users (`handlers_users.go`)

Handler	Notes
`handleMsgSysInsertUser`	Register a new user session
`handleMsgSysDeleteUser`	Remove a user session
`handleMsgSysNotifyUserBinary`	Notify clients of a user binary state change

Reserved Protocol Slots (56 handlers)

handlers_reserve.go contains 56 empty handlers for message IDs that are reserved in the MHF protocol but never sent by any known client version. These are intentionally empty and are not missing features.

Two reserve IDs (188, 18B) have partial implementations returning hardcoded responses — they appear in an unknown subsystem and are documented with inline comments in the source.

Full list: handleMsgSysReserve01–07, 0C–0E, 4A–4F, 55–57, 5C, 5E–5F, 71–7C, 7E, 180, 18E–18F, 19B–19F, 1A4, 1A6–1AF, 192–194, handleMsgMhfReserve10F.

7.7 KiB Raw Blame History Unescape Escape

Unimplemented Handlers

Unimplemented (68 handlers)

Achievements (handlers_achievement.go)

Caravan (handlers_caravan.go)

Cast Binary (handlers_cast_binary.go)

Client Management (handlers_clients.go)

Data / Auth (handlers_data.go)

Events (handlers_event.go)

Guild (handlers_guild.go)

House / My Room (handlers_house.go)

Items (handlers_items.go)

Misc (handlers_misc.go)

Mutex (handlers_mutex.go)

Object Sync (handlers_object.go)

Quests (handlers_quest.go)

Register (handlers_register.go)

Rewards (handlers_reward.go)

Session (handlers_session.go)

Stage (handlers_stage.go)

Tactics / UD (handlers_tactics.go)

Users (handlers_users.go)