Data Structures

Here are the data structures with brief descriptions:
CarContact16 bytes : one car in a contact - two of these in the IS_CON
CarContOBJ8 bytes : car in a contact with an object
CompCarCar info in 28 bytes
IS_ACRAdmin Command Report - any user typed an admin command
IS_AXIAutoX Info
IS_AXMAutoX Multiple objects - variable size
IS_AXOAutoX Object
IS_BFNButton FunctioN
IS_BTCBuTton Click
IS_BTNBuTtoN
IS_BTTBuTton Type
IS_CCHCamera CHange
IS_CNLConN Leave
IS_CONCONtact - between two cars (A and B are sorted by PLID)
IS_CPPCam Pos Pack
IS_CPRConn Player Rename
IS_CRSCar ReSet
IS_FINFINished race notification
IS_FLGFLaG
IS_HLVHot Lap Validity - illegal ground / hit wall / speeding in pit lane
IS_IIIInsIm Info
IS_ISIInSim Init - packet to initialise the InSim system
IS_ISMInSim Multi
IS_LAPLAP time
IS_MCIMulti Car Info
IS_MODSend to LFS to change screen mode
IS_MSLMSg Local - message to appear on local computer only
IS_MSOMSg Out - system messages and user messages
IS_MSTMSG Type - send to LFS to type message or command
IS_MSXMSg eXtended - like MST but longer (not for commands)
IS_MTCMsg To Connection - hosts only - send to a connection / a player / all
IS_NCNNew ConN
IS_NLPNode and Lap Packet
IS_NPLNew PLayer joining race
IS_OBHOBject Hit - car hit an autocross object or an unknown object
IS_PENPENalty
IS_PFLPlayer FLags
IS_PITPIT stop
IS_PLAPit LAne
IS_PLCPLayer Cars
IS_PLLPLayer Leave race
IS_PLPPLayer Pits
IS_PSFPit Stop Finished
IS_REOREOrder
IS_RESRESult
IS_RIPReplay Information Packet
IS_RSTRace STart
IS_SCCSet Car Camera
IS_SCHSingle CHaracter
IS_SFPState Flags Pack
IS_SMALLIS_SMALL - used for various requests, replies and reports
IS_SPXSPlit X time
IS_SSHScreenSHot
IS_STAStatePack
IS_TINYIS_TINY - used for various requests, replies and reports
IS_TOCTake Over Car
IS_VERThis version packet can be sent on request
IS_VTNVoTe Notify
NodeLapCar info in 6 bytes
ObjectInfoInfo about a single object - explained in the layout file format
OutGaugePackOutGaugePack
OutSimPackOutSimPack
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