#ifndef _ISPACKETS_H_
#define _ISPACKETS_H_
/////////////////////

// InSim for Live for Speed

// InSim allows communication between up to 8 external programs and LFS.

// TCP or UDP packets can be sent in both directions, LFS reporting various
// things about its state, and the external program requesting info and
// controlling LFS with special packets, text commands or keypresses.

// NOTE : This text file was written with a TAB size equal to 4 spaces.


// INSIM VERSION NUMBER (updated for version 0.6M)
// ====================

const int INSIM_VERSION = 7;


// CHANGES
// =======

// Version 0.6N
// ------------
// Added ISS_DIALOG and ISS_TEXT_ENTRY to the ISS state flags
// New packet SMALL_LCS - set local car switches (lights, horn, siren)

// Version 0.6M (INSIM_VERSION increased to 7)
// ------------
// Backward compatibility system - send INSIM_VERSION in the IS_ISI
// Older programs (that send zero) are assumed to require version 6
// New join request system enabled if ISF_REQ_JOIN is set in IS_ISI
// IS_JRR can also be used to reset a car at a specified location
// Packet IS_CSC to report changes in car state (currently start or stop)
// Zbyte added to CarContObject structure to report car's altitude
// Zbyte added to IS_OBH so the layout object can be identified
// IS_MSO / IS_III / IS_ACR message out packets now have variable size
// IS_BFN can now be used to delete a range of buttons with a single packet
// New packet IS_OCO can be used to override specific or all start lights
// New IS_AXM option PMO_SELECTION to set the current editor selection
// Added TTC_SEL to request an IS_AXM with layout editor selection
// Added TINY_AXM to request IS_AXM packets for the entire layout
// IS_SSH documentation updated as it is no longer only for bmp files
// New packet IS_UCO sends info about InSim checkpoints and circles
// New packet IS_SLC reports a connection's currently selected car
// Packet TINY_SLC to request an IS_SLC for all connections
// Added TINY_ALC and SMALL_ALC to get and set allowed cars (like /cars)
// Value 5 (out of bounds) added to the IS_HLV packet

// Version 0.6H (INSIM_VERSION increased to 6)
// ------------
// IS_REO and IS_NLP increased in size to allow 40 drivers
// ObjectInfo Zchar is now Zbyte - see layout file description
// ISP_NCI packet added to give host more info about new guest

// Version 0.6C
// ------------
// Small change to the in-game usage of IS_REO - only valid after SMALL_VTA
// Some more values (CPW / OOS / JOOS / HACK) added to the leave reasons

// Version 0.6B (INSIM_VERSION increased to 5)
// ------------
// Lap timing info added to IS_RST (Timing byte)
// NLP / MCI minimum time interval reduced to 40 ms (was 50 ms)
// IS_VTC now cancels game votes even if the majority has not been reached
// IS_MTC (Msg To Connection) now has a variable length (up to 128 characters)
// IS_MTC can be sent to all (UCID = 255) and sound effect can be specified
// IS_CON reports contact between two cars           (if ISF_CON is set)
// IS_OBH reports information about any object hit   (if ISF_OBH is set)
// IS_HLV reports incidents that would violate HLVC  (if ISF_HLV is set)
// IS_PLC sets allowed cars for individual players
// IS_AXM to add / remove / clear autocross objects
// IS_ACR reports successful or attempted admin commands
// OG_SHIFT and OG_CTRL (keys) bits added to OutGaugePack
// New IS_RIP option RIPOPT_FULL_PHYS to use full physics when searching
// ISS_SHIFTU_HIGH is no longer used (no high / low view distinction)
// FIX : Clutch axis / button was not reported from Controls screen
// FIX : TTime in IS_RIP was wrong in mid-joined Multiplayer Replays
// FIX : IS_BTN did not allow the documented limit of 240 characters
// FIX : OutGaugePack ID was always zero regardless of ID in cfg.txt
// FIX : InSim camera with vertical pitch would cause LFS to crash

// Version 0.5Z (no change to INSIM_VERSION)
// ------------
// NLP / MCI packets are now output at regular intervals
// CCI_LAG bit added to the CompCar structure


// TYPES : (all multi-byte types are PC style - lowest byte first)
// =====

// char			1-byte character
// byte			1-byte unsigned integer
// word			2-byte unsigned integer
// short		2-byte signed integer
// unsigned		4-byte unsigned integer
// int			4-byte signed integer
// float		4-byte float

// RaceLaps (rl) : (various meanings depending on range)

// 0       : practice
// 1-99    : number of laps...   laps  = rl
// 100-190 : 100 to 1000 laps... laps  = (rl - 100) * 10 + 100
// 191-238 : 1 to 48 hours...    hours = rl - 190


// InSim PACKETS
// =============

// All InSim packets use a four byte header

// Size : total packet size - a multiple of 4
// Type : packet identifier from the ISP_ enum (see below)
// ReqI : non zero if the packet is a packet request or a reply to a request
// Data : the first data byte

// Spare bytes and Zero bytes must be filled with ZERO


// INITIALISING InSim
// ==================

// To initialise the InSim system, type into LFS : /insim xxxxx
// where xxxxx is the TCP and UDP port you want LFS to open.

// OR start LFS with the command line option : LFS /insim=xxxxx
// This will make LFS listen for packets on that TCP and UDP port.


// TO START COMMUNICATION
// ======================

// TCP : Connect to LFS using a TCP connection, then send this packet :
// UDP : No connection required, just send this packet to LFS :

struct IS_ISI // InSim Init - packet to initialise the InSim system
{
	byte	Size;		// 44
	byte	Type;		// ISP_ISI
	byte	ReqI;		// If non-zero LFS will send an IS_VER packet
	byte	Zero;		// 0

	word	UDPPort;	// Port for UDP replies from LFS (0 to 65535)
	word	Flags;		// Bit flags for options (see below)

	byte	InSimVer;	// The INSIM_VERSION used by your program
	byte	Prefix;		// Special host message prefix character
	word	Interval;	// Time in ms between NLP or MCI (0 = none)

	char	Admin[16];	// Admin password (if set in LFS)
	char	IName[16];	// A short name for your program
};

// NOTE 1) UDPPort field when you connect using UDP :

// zero     : LFS sends all packets to the port of the incoming packet
// non-zero : LFS sends all packets to the specified UDPPort

// NOTE 2) UDPPort field when you connect using TCP :

// zero     : LFS sends NLP / MCI packets using your TCP connection
// non-zero : LFS sends NLP / MCI packets to the specified UDPPort

// NOTE 3) Flags field (set the relevant bits to turn on the option) :

#define ISF_RES_0		   1	// bit  0 : spare
#define ISF_RES_1		   2	// bit  1 : spare
#define ISF_LOCAL		   4	// bit  2 : guest or single player
#define ISF_MSO_COLS	   8	// bit  3 : keep colours in MSO text
#define ISF_NLP			  16	// bit  4 : receive NLP packets
#define ISF_MCI			  32	// bit  5 : receive MCI packets
#define ISF_CON			  64	// bit  6 : receive CON packets
#define ISF_OBH			 128	// bit  7 : receive OBH packets
#define ISF_HLV			 256	// bit  8 : receive HLV packets
#define ISF_AXM_LOAD	 512	// bit  9 : receive AXM when loading a layout
#define ISF_AXM_EDIT	1024	// bit 10 : receive AXM when changing objects
#define ISF_REQ_JOIN	2048	// bit 11 : process join requests

// In most cases you should not set both ISF_NLP and ISF_MCI flags
// because all IS_NLP information is included in the IS_MCI packet.

// The ISF_LOCAL flag is important if your program creates buttons.
// It should be set if your program is not a host control system.
// If set, then buttons are created in the local button area, so
// avoiding conflict with the host buttons and allowing the user
// to switch them with SHIFT+B rather than SHIFT+I.

// NOTE 4) InSimVer field :

// Provide the INSIM_VERSION that your program was designed for.
// Later LFS versions will try to retain backward compatibility
// if it can be provided, within reason.  Not guaranteed.

// NOTE 5) Prefix field, if set when initialising InSim on a host :

// Messages typed with this prefix will be sent to your InSim program
// on the host (in IS_MSO) and not displayed on anyone's screen.


// ENUMERATIONS FOR PACKET TYPES
// =============================

enum // the second byte of any packet is one of these
{
	ISP_NONE,		//  0					: not used
	ISP_ISI,		//  1 - instruction		: insim initialise
	ISP_VER,		//  2 - info			: version info
	ISP_TINY,		//  3 - both ways		: multi purpose
	ISP_SMALL,		//  4 - both ways		: multi purpose
	ISP_STA,		//  5 - info			: state info
	ISP_SCH,		//  6 - instruction		: single character
	ISP_SFP,		//  7 - instruction		: state flags pack
	ISP_SCC,		//  8 - instruction		: set car camera
	ISP_CPP,		//  9 - both ways		: cam pos pack
	ISP_ISM,		// 10 - info			: start multiplayer
	ISP_MSO,		// 11 - info			: message out
	ISP_III,		// 12 - info			: hidden /i message
	ISP_MST,		// 13 - instruction		: type message or /command
	ISP_MTC,		// 14 - instruction		: message to a connection
	ISP_MOD,		// 15 - instruction		: set screen mode
	ISP_VTN,		// 16 - info			: vote notification
	ISP_RST,		// 17 - info			: race start
	ISP_NCN,		// 18 - info			: new connection
	ISP_CNL,		// 19 - info			: connection left
	ISP_CPR,		// 20 - info			: connection renamed
	ISP_NPL,		// 21 - info			: new player (joined race)
	ISP_PLP,		// 22 - info			: player pit (keeps slot in race)
	ISP_PLL,		// 23 - info			: player leave (spectate - loses slot)
	ISP_LAP,		// 24 - info			: lap time
	ISP_SPX,		// 25 - info			: split x time
	ISP_PIT,		// 26 - info			: pit stop start
	ISP_PSF,		// 27 - info			: pit stop finish
	ISP_PLA,		// 28 - info			: pit lane enter / leave
	ISP_CCH,		// 29 - info			: camera changed
	ISP_PEN,		// 30 - info			: penalty given or cleared
	ISP_TOC,		// 31 - info			: take over car
	ISP_FLG,		// 32 - info			: flag (yellow or blue)
	ISP_PFL,		// 33 - info			: player flags (help flags)
	ISP_FIN,		// 34 - info			: finished race
	ISP_RES,		// 35 - info			: result confirmed
	ISP_REO,		// 36 - both ways		: reorder (info or instruction)
	ISP_NLP,		// 37 - info			: node and lap packet
	ISP_MCI,		// 38 - info			: multi car info
	ISP_MSX,		// 39 - instruction		: type message
	ISP_MSL,		// 40 - instruction		: message to local computer
	ISP_CRS,		// 41 - info			: car reset
	ISP_BFN,		// 42 - both ways		: delete buttons / receive button requests
	ISP_AXI,		// 43 - info			: autocross layout information
	ISP_AXO,		// 44 - info			: hit an autocross object
	ISP_BTN,		// 45 - instruction		: show a button on local or remote screen
	ISP_BTC,		// 46 - info			: sent when a user clicks a button
	ISP_BTT,		// 47 - info			: sent after typing into a button
	ISP_RIP,		// 48 - both ways		: replay information packet
	ISP_SSH,		// 49 - both ways		: screenshot
	ISP_CON,		// 50 - info			: contact between cars (collision report)
	ISP_OBH,		// 51 - info			: contact car + object (collision report)
	ISP_HLV,		// 52 - info			: report incidents that would violate HLVC
	ISP_PLC,		// 53 - instruction		: player cars
	ISP_AXM,		// 54 - both ways		: autocross multiple objects
	ISP_ACR,		// 55 - info			: admin command report
	ISP_HCP,		// 56 - instruction		: car handicaps
	ISP_NCI,		// 57 - info			: new connection - extra info for host
	ISP_JRR,		// 58 - instruction		: reply to a join request (allow / disallow)
	ISP_UCO,		// 59 - info			: report InSim checkpoint / InSim circle
	ISP_OCO,		// 60 - instruction		: object control (currently used for lights)
	ISP_TTC,		// 61 - instruction		: multi purpose - target to connection
	ISP_SLC,		// 62 - info			: connection selected a car
	ISP_CSC,		// 63 - info			: car state changed
};

enum // the fourth byte of an IS_TINY packet is one of these
{
	TINY_NONE,		//  0 - keep alive		: see "maintaining the connection"
	TINY_VER,		//  1 - info request	: get version
	TINY_CLOSE,		//  2 - instruction		: close insim
	TINY_PING,		//  3 - ping request	: external progam requesting a reply
	TINY_REPLY,		//  4 - ping reply		: reply to a ping request
	TINY_VTC,		//  5 - both ways		: game vote cancel (info or request)
	TINY_SCP,		//  6 - info request	: send camera pos
	TINY_SST,		//  7 - info request	: send state info
	TINY_GTH,		//  8 - info request	: get time in hundredths (i.e. SMALL_RTP)
	TINY_MPE,		//  9 - info			: multi player end
	TINY_ISM,		// 10 - info request	: get multiplayer info (i.e. ISP_ISM)
	TINY_REN,		// 11 - info			: race end (return to race setup screen)
	TINY_CLR,		// 12 - info			: all players cleared from race
	TINY_NCN,		// 13 - info request	: get NCN for all connections
	TINY_NPL,		// 14 - info request	: get all players
	TINY_RES,		// 15 - info request	: get all results
	TINY_NLP,		// 16 - info request	: send an IS_NLP
	TINY_MCI,		// 17 - info request	: send an IS_MCI
	TINY_REO,		// 18 - info request	: send an IS_REO
	TINY_RST,		// 19 - info request	: send an IS_RST
	TINY_AXI,		// 20 - info request	: send an IS_AXI - AutoX Info
	TINY_AXC,		// 21 - info			: autocross cleared
	TINY_RIP,		// 22 - info request	: send an IS_RIP - Replay Information Packet
	TINY_NCI,		// 23 - info request	: get NCI for all guests (on host only)
	TINY_ALC,		// 24 - info request	: send a SMALL_ALC (allowed cars)
	TINY_AXM,		// 25 - info request	: send IS_AXM packets for the entire layout
	TINY_SLC,		// 26 - info request	: send IS_SLC packets for all connections
};

enum // the fourth byte of an IS_SMALL packet is one of these
{
	SMALL_NONE,		//  0					: not used
	SMALL_SSP,		//  1 - instruction		: start sending positions
	SMALL_SSG,		//  2 - instruction		: start sending gauges
	SMALL_VTA,		//  3 - report			: vote action
	SMALL_TMS,		//  4 - instruction		: time stop
	SMALL_STP,		//  5 - instruction		: time step
	SMALL_RTP,		//  6 - info			: race time packet (reply to GTH)
	SMALL_NLI,		//  7 - instruction		: set node lap interval
	SMALL_ALC,		//  8 - both ways		: set or get allowed cars (TINY_ALC)
	SMALL_LCS,		//  9 - instruction		: set local car switches (lights, horn, siren)
};

enum // the fourth byte of an IS_TTC packet is one of these
{
	TTC_NONE,		//  0					: not used
	TTC_SEL,		//  1 - info request	: send IS_AXM for a layout editor selection
};


// GENERAL PURPOSE PACKETS - IS_TINY (4 bytes) / IS_SMALL (8 bytes) / IS_TTC (8 bytes)
// =======================

// To avoid defining several packet structures that are exactly the same, and to avoid
// wasting the ISP_ enumeration, IS_TINY is used at various times when no additional data
// other than SubT is required.  IS_SMALL is used when an additional integer is needed.

// IS_TINY

struct IS_TINY // General purpose 4 byte packet
{
	byte	Size;		// 4
	byte	Type;		// ISP_TINY
	byte	ReqI;		// 0 unless it is an info request or a reply to an info request
	byte	SubT;		// subtype, from TINY_ enumeration (e.g. TINY_RACE_END)
};

// IS_SMALL

struct IS_SMALL // General purpose 8 byte packet
{
	byte	Size;		// 8
	byte	Type;		// ISP_SMALL
	byte	ReqI;		// 0 unless it is an info request or a reply to an info request
	byte	SubT;		// subtype, from SMALL_ enumeration (e.g. SMALL_SSP)

	unsigned	UVal;	// value (e.g. for SMALL_SSP this would be the OutSim packet rate)
};

// IS_TTC

struct IS_TTC // General purpose 8 byte packet (Target To Connection)
{
	byte	Size;		// 8
	byte	Type;		// ISP_TTC
	byte	ReqI;		// 0 unless it is an info request or a reply to an info request
	byte	SubT;		// subtype, from TTC_ enumeration (e.g. TTC_SEL)

	byte	UCID;		// connection's unique id (0 = local)
	byte	B1;			// B1, B2, B3 may be used in various ways depending on SubT
	byte	B2;
	byte	B3;
};


// VERSION REQUEST
// ===============

// It is advisable to request version information as soon as you have connected, to
// avoid problems when connecting to a host with a later or earlier version.  You will
// be sent a version packet on connection if you set ReqI in the IS_ISI packet.

// This version packet is sent on request :

struct IS_VER // VERsion
{
	byte	Size;			// 20
	byte	Type;			// ISP_VERSION
	byte	ReqI;			// ReqI as received in the request packet
	byte	Zero;

	char	Version[8];		// LFS version, e.g. 0.3G
	char	Product[6];		// Product : DEMO / S1 / S2 / S3
	byte	InSimVer;		// InSim version (see below)
	byte	Spare;			// Spare
};

// To request an IS_VER packet at any time, send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_VER		(request an IS_VER)

// NOTE : LFS tries to match InSimVer with the version requested in your program's IS_ISI
// packet if it is lower than the latest version known to LFS.  If backward compatibility
// is no longer possible then this version may be higher than your program requested.
// In that case your program may not be able to read some packets sent to it by LFS.
// If you connect to an older LFS version then InSimVer may be lower than requested.

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_PING		(request a TINY_REPLY)


// CLOSING InSim
// =============

// You can send this IS_TINY to close the InSim connection to your program :

// ReqI : 0
// SubT : TINY_CLOSE	(close this connection)

// Another InSimInit packet is then required to start operating again.

// You can shut down InSim completely and stop it listening at all by typing /insim=0
// into LFS (or send a MsgTypePack to do the same thing).


// MAINTAINING THE CONNECTION - IMPORTANT
// ==========================

// If InSim does not receive a packet for 70 seconds, it will close your connection.
// To open it again you would need to send another InSimInit packet.

// LFS will send a blank IS_TINY packet like this every 30 seconds :

// ReqI : 0
// SubT : TINY_NONE		(keep alive packet)

// You should reply with a blank IS_TINY packet :

// ReqI : 0
// SubT : TINY_NONE		(has no effect other than resetting the timeout)

// NOTE : If you want to request a reply from LFS to check the connection
// at any time, you can send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_PING		(request a TINY_REPLY)

// LFS will reply with this IS_TINY :

// ReqI : non-zero		(as received in the request packet)
// SubT : TINY_REPLY	(reply to ping)


// STATE REPORTING AND REQUESTS
// ============================

// LFS will send an IS_STA any time the info in it changes.

struct IS_STA // STAte
{
	byte	Size;			// 28
	byte	Type;			// ISP_STA
	byte	ReqI;			// ReqI if replying to a request packet
	byte	Zero;

	float	ReplaySpeed;	// 4-byte float - 1.0 is normal speed

	word	Flags;			// ISS state flags (see below)
	byte	InGameCam;		// Which type of camera is selected (see below)
	byte	ViewPLID;		// Unique ID of viewed player (0 = none)

	byte	NumP;			// Number of players in race
	byte	NumConns;		// Number of connections including host
	byte	NumFinished;	// Number finished or qualified
	byte	RaceInProg;		// 0 - no race / 1 - race / 2 - qualifying

	byte	QualMins;
	byte	RaceLaps;		// see "RaceLaps" near the top of this document
	byte	Spare2;
	byte	Spare3;

	char	Track[6];		// short name for track e.g. FE2R
	byte	Weather;		// 0,1,2...
	byte	Wind;			// 0=off 1=weak 2=strong
};

// InGameCam is the in game selected camera mode (which is
// still selected even if LFS is actually in SHIFT+U mode).
// For InGameCam's values, see "View identifiers" below.

// ISS state flags

#define ISS_GAME			1		// in game (or MPR)
#define ISS_REPLAY			2		// in SPR
#define ISS_PAUSED			4		// paused
#define ISS_SHIFTU			8		// SHIFT+U mode
#define ISS_DIALOG			16		// in a dialog
#define ISS_SHIFTU_FOLLOW	32		// FOLLOW view
#define ISS_SHIFTU_NO_OPT	64		// SHIFT+U buttons hidden
#define ISS_SHOW_2D			128		// showing 2d display
#define ISS_FRONT_END		256		// entry screen
#define ISS_MULTI			512		// multiplayer mode
#define ISS_MPSPEEDUP		1024	// multiplayer speedup option
#define ISS_WINDOWED		2048	// LFS is running in a window
#define ISS_SOUND_MUTE		4096	// sound is switched off
#define ISS_VIEW_OVERRIDE	8192	// override user view
#define ISS_VISIBLE			16384	// InSim buttons visible
#define ISS_TEXT_ENTRY		32768	// in a text entry dialog

// To request an IS_STA at any time, send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_SST		(Send STate)

// Setting states

// These states can be set by a special packet :

// ISS_SHIFTU_NO_OPT	- SHIFT+U buttons hidden
// ISS_SHOW_2D			- showing 2d display
// ISS_MPSPEEDUP		- multiplayer speedup option
// ISS_SOUND_MUTE		- sound is switched off

struct IS_SFP // State Flags Pack
{
	byte	Size;		// 8
	byte	Type;		// ISP_SFP
	byte	ReqI;		// 0
	byte	Zero;

	word	Flag;		// the state to set
	byte	OffOn;		// 0 = off / 1 = on
	byte	Sp3;		// spare
};

// Other states must be set by using keypresses or messages (see below)


// SCREEN MODE
// ===========

// You can send this packet to LFS to set the screen mode :

struct IS_MOD // MODe : send to LFS to change screen mode
{
	byte	Size;		// 20
	byte	Type;		// ISP_MOD
	byte	ReqI;		// 0
	byte	Zero;

	int		Bits16;		// set to choose 16-bit
	int		RR;			// refresh rate - zero for default
	int		Width;		// 0 means go to window
	int		Height;		// 0 means go to window
};

// The refresh rate actually selected by LFS will be the highest available rate
// that is less than or equal to the specified refresh rate.  Refresh rate can
// be specified as zero in which case the default refresh rate will be used.

// If Width and Height are both zero, LFS will switch to windowed mode.


// TEXT MESSAGES AND KEY PRESSES
// ==============================

// You can send 64-byte text messages to LFS as if the user had typed them in.
// Messages that appear on LFS screen (up to 128 bytes) are reported to the
// external program.  You can also send simulated keypresses to LFS.

// MESSAGES OUT (FROM LFS)
// ------------

struct IS_MSO // MSg Out - system messages and user messages - variable size
{
	byte	Size;		// 12, 16, 20... 136 depending on Msg
	byte	Type;		// ISP_MSO
	byte	ReqI;		// 0
	byte	Zero;

	byte	UCID;		// connection's unique id (0 = host)
	byte	PLID;		// player's unique id (if zero, use UCID)
	byte	UserType;	// set if typed by a user (see User Values below) 
	byte	TextStart;	// first character of the actual text (after player name)

	char	Msg[128];	// 4, 8, 12... 128 characters - last byte is zero
};

// User Values (for UserType byte)

enum
{
	MSO_SYSTEM,			// 0 - system message
	MSO_USER,			// 1 - normal visible user message
	MSO_PREFIX,			// 2 - hidden message starting with special prefix (see ISI)
	MSO_O,				// 3 - hidden message typed on local pc with /o command
	MSO_NUM
};

// NOTE : Typing "/o MESSAGE" into LFS will send an IS_MSO with UserType = MSO_O

struct IS_III // InsIm Info - /i message from user to host's InSim - variable size
{
	byte	Size;		// 12, 16, 20... 72 depending on Msg
	byte	Type;		// ISP_III
	byte	ReqI;		// 0
	byte	Zero;

	byte	UCID;		// connection's unique id (0 = host)
	byte	PLID;		// player's unique id (if zero, use UCID)
	byte	Sp2;
	byte	Sp3;

	char	Msg[64];	// 4, 8, 12... 64 characters - last byte is zero
};

struct IS_ACR // Admin Command Report - a user typed an admin command - variable size
{
	byte	Size;		// 12, 16, 20... 72 depending on Text
	byte	Type;		// ISP_ACR
	byte	ReqI;		// 0
	byte	Zero;

	byte	UCID;		// connection's unique id (0 = host)
	byte	Admin;		// set if user is an admin
	byte	Result;		// 1 - processed / 2 - rejected / 3 - unknown command
	byte	Sp3;

	char	Text[64];	// 4, 8, 12... 64 characters - last byte is zero
};

// MESSAGES IN (TO LFS)
// -----------

struct IS_MST // MSg Type - send to LFS to type message or command
{
	byte	Size;		// 68
	byte	Type;		// ISP_MST
	byte	ReqI;		// 0
	byte	Zero;

	char	Msg[64];	// last byte must be zero
};

struct IS_MSX // MSg eXtended - like MST but longer (not for commands)
{
	byte	Size;		// 100
	byte	Type;		// ISP_MSX
	byte	ReqI;		// 0
	byte	Zero;

	char	Msg[96];	// last byte must be zero
};

struct IS_MSL // MSg Local - message to appear on local computer only
{
	byte	Size;		// 132
	byte	Type;		// ISP_MSL
	byte	ReqI;		// 0
	byte	Sound;		// sound effect (see Message Sounds below)

	char	Msg[128];	// last byte must be zero
};

struct IS_MTC // Msg To Connection - hosts only - send to a connection / a player / all
{
	byte	Size;		// 8 + TEXT_SIZE (TEXT_SIZE = 4, 8, 12... 128)
	byte	Type;		// ISP_MTC
	byte	ReqI;		// 0
	byte	Sound;		// sound effect (see Message Sounds below)

	byte	UCID;		// connection's unique id (0 = host / 255 = all)
	byte	PLID;		// player's unique id (if zero, use UCID)
	byte	Sp2;
	byte	Sp3;

//	char	Text[TEXT_SIZE]; // up to 128 characters of text - last byte must be zero
};

// Message Sounds (for Sound byte)

enum
{
	SND_SILENT,
	SND_MESSAGE,
	SND_SYSMESSAGE,
	SND_INVALIDKEY,
	SND_ERROR,
	SND_NUM
};

// You can send individual key presses to LFS with the IS_SCH packet.
// For standard keys (e.g. V and H) you should send a capital letter.
// This does not work with some keys like F keys, arrows or CTRL keys.
// You can also use IS_MST with the /press /shift /ctrl /alt commands.

struct IS_SCH // Single CHaracter
{
	byte	Size;		// 8
	byte	Type;		// ISP_SCH
	byte	ReqI;		// 0
	byte	Zero;

	byte	CharB;		// key to press
	byte	Flags;		// bit 0 : SHIFT / bit 1 : CTRL
	byte	Spare2;
	byte	Spare3;
};


// CAR SWITCHES
// ============

// To operate the local car's lights, horn or siren you can send this IS_SMALL :

// ReqI : 0
// SubT : SMALL_LCS		(Local Car Switches)
// UVal : Switches		(see below)

// Switches bits

// Bits 0 to 7 are a set of flags specifying which values to set.  You can set as many
// as you like at a time.  This is to allow you to set only the values you want to set
// while leaving the others to be controlled by the user.

#define LCS_SET_SIGNALS		1		// bit 0
#define LCS_SET_FLASH		2		// bit 1
#define LCS_SET_HEADLIGHTS	4		// bit 2
#define LCS_SET_HORN		8		// bit 3
#define LCS_SET_SIREN		0x10	// bit 4

// Depending on the above values, InSim will read some of the following values and try
// to set them as required, if a real player is found on the local computer.

// bits 8-9   (Switches & 0x0300) - Signal    (0 off / 1 left / 2 right / 3 hazard)
// bit  10    (Switches & 0x0400) - Flash
// bit	11    (Switches & 0x0800) - Headlights

// bits 16-18 (Switches & 0x070000) - Horn    (0 off / 1 to 5 horn type)
// bits 20-21 (Switches & 0x300000) - Siren   (0 off / 1 fast / 2 slow)


// MULTIPLAYER NOTIFICATION
// ========================

// LFS will send this packet when a host is started or joined :

struct IS_ISM // InSim Multi
{
	byte	Size;		// 40
	byte	Type;		// ISP_ISM
	byte	ReqI;		// usually 0 / or if a reply : ReqI as received in the TINY_ISM
	byte	Zero;

	byte	Host;		// 0 = guest / 1 = host
	byte	Sp1;
	byte	Sp2;
	byte	Sp3;

	char	HName[32];	// the name of the host joined or started
};

// On ending or leaving a host, LFS will send this IS_TINY :

// ReqI : 0
// SubT : TINY_MPE		(MultiPlayerEnd)

// To request an IS_ISM packet at any time, send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_ISM		(request an IS_ISM)

// NOTE : If LFS is not in multiplayer mode, the host name in the ISM will be empty.


// VOTE NOTIFY AND CANCEL
// ======================

// LFS notifies the external program of any votes to restart or qualify

// The Vote Actions are defined as :

enum
{
	VOTE_NONE,			// 0 - no vote
	VOTE_END,			// 1 - end race
	VOTE_RESTART,		// 2 - restart
	VOTE_QUALIFY,		// 3 - qualify
	VOTE_NUM
};

struct IS_VTN // VoTe Notify
{
	byte	Size;		// 8
	byte	Type;		// ISP_VTN
	byte	ReqI;		// 0
	byte	Zero;

	byte	UCID;		// connection's unique id
	byte	Action;		// VOTE_X (Vote Action as defined above)
	byte	Spare2;
	byte	Spare3;
};

// When a vote is cancelled, LFS sends this IS_TINY

// ReqI : 0
// SubT : TINY_VTC		(VoTe Cancelled)

// When a vote is completed, LFS sends this IS_SMALL

// ReqI : 0
// SubT : SMALL_VTA  	(VoTe Action)
// UVal : action 		(VOTE_X - Vote Action as defined above)

// You can instruct LFS host to cancel a vote using an IS_TINY

// ReqI : 0
// SubT : TINY_VTC		(VoTe Cancel)


// ALLOWED CARS
// ============

// To set the allowed cars on the host (like /cars command) you can send this IS_SMALL :

// ReqI : 0
// SubT : SMALL_ALC		(ALlowed Cars)
// UVal : Cars			(see below)

// To find out the allowed cars at any time (on guest or host) send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_ALC		(request a SMALL_ALC)

// LFS will reply with this IS_SMALL :

// ReqI : non-zero		(as received in the request packet)
// SubT : SMALL_ALC		(ALlowed Cars)
// UVal : Cars			(see below)

// You can send a packet to limit the cars that can be used by a given connection
// The resulting set of selectable cars is a subset of the cars set to be available
// on the host (by the /cars command or SMALL_ALC)

// For example :
// Cars = 0          ... no cars can be selected on the specified connection
// Cars = 0xffffffff ... all the host's available cars can be selected

struct IS_PLC // PLayer Cars
{
	byte	Size;		// 12
	byte	Type;		// ISP_PLC
	byte	ReqI;		// 0
	byte	Zero;

	byte	UCID;		// connection's unique id (0 = host / 255 = all)
	byte	Sp1;
	byte	Sp2;
	byte	Sp3;

	unsigned	Cars;	// allowed cars - see below
};

// XF GTI			-       1
// XR GT			-       2
// XR GT TURBO		-       4
// RB4 GT			-       8
// FXO TURBO		-    0x10
// LX4				-    0x20
// LX6				-    0x40
// MRT5				-    0x80
// UF 1000			-   0x100
// RACEABOUT		-   0x200
// FZ50				-   0x400
// FORMULA XR		-   0x800
// XF GTR			-  0x1000
// UF GTR			-  0x2000
// FORMULA V8		-  0x4000
// FXO GTR			-  0x8000
// XR GTR			- 0x10000
// FZ50 GTR			- 0x20000
// BMW SAUBER F1.06	- 0x40000
// FORMULA BMW FB02	- 0x80000


// HANDICAPS
// =========

// You can send a packet to add mass and restrict the intake on each car model
// The same restriction applies to all drivers using a particular car model
// This can be useful for creating multi class hosts

struct CarHCP // Car handicaps in 2 bytes - there is an array of these in the HCP (below)
{
	byte	H_Mass;		// 0 to 200 - added mass (kg)
	byte	H_TRes;		// 0 to  50 - intake restriction
};

struct IS_HCP // HandiCaPs
{
	byte	Size;		// 68
	byte	Type;		// ISP_HCP
	byte	ReqI;		// 0
	byte	Zero;

	CarHCP	Info[32];	// H_Mass and H_TRes for each car : XF GTI = 0 / XR GT = 1 etc
};


// RACE TRACKING
// =============

// In LFS there is a list of connections AND a list of players in the race
// Some packets are related to connections, some players, some both

// If you are making a multiplayer InSim program, you must maintain two lists
// You should use the unique identifier UCID to identify a connection

// Each player has a unique identifier PLID from the moment he joins the race, until he
// leaves.  It's not possible for PLID and UCID to be the same thing, for two reasons :

// 1) there may be more than one player per connection if AI drivers are used
// 2) a player can swap between connections, in the case of a driver swap (IS_TOC)

// When all players are cleared from race (e.g. /clear) LFS sends this IS_TINY

// ReqI : 0
// SubT : TINY_CLR		(CLear Race)

// When a race ends (return to race setup screen) LFS sends this IS_TINY

// ReqI : 0
// SubT : TINY_REN  	(Race ENd)

// You can instruct LFS host to cancel a vote using an IS_TINY

// ReqI : 0
// SubT : TINY_VTC		(VoTe Cancel)

// The following packets are sent when the relevant events take place :

struct IS_RST // Race STart
{
	byte	Size;		// 28
	byte	Type;		// ISP_RST
	byte	ReqI;		// 0 unless this is a reply to an TINY_RST request
	byte	Zero;

	byte	RaceLaps;	// 0 if qualifying
	byte	QualMins;	// 0 if race
	byte	NumP;		// number of players in race
	byte	Timing;		// lap timing (see below)

	char	Track[6];	// short track name
	byte	Weather;
	byte	Wind;

	word	Flags;		// race flags (must pit, can reset, etc - see below)
	word	NumNodes;	// total number of nodes in the path
	word	Finish;		// node index - finish line
	word	Split1;		// node index - split 1
	word	Split2;		// node index - split 2
	word	Split3;		// node index - split 3
};

// Lap timing info (for Timing byte)

// bits 6 and 7 (Timing & 0xc0) :

// 0x40 : standard lap timing is being used
// 0x80 : custom timing - user checkpoints have been placed
// 0xc0 : no lap timing - e.g. open config with no user checkpoints

// bits 0 and 1 (Timing & 0x03) : number of checkpoints if lap timing is enabled

// To request an IS_RST packet at any time, send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_RST		(request an IS_RST)

struct IS_NCN // New ConN
{
	byte	Size;		// 56
	byte	Type;		// ISP_NCN
	byte	ReqI;		// 0 unless this is a reply to a TINY_NCN request
	byte	UCID;		// new connection's unique id (0 = host)

	char	UName[24];	// username
	char	PName[24];	// nickname

	byte	Admin;		// 1 if admin
	byte	Total;		// number of connections including host
	byte	Flags;		// bit 2 : remote
	byte	Sp3;
};

struct IS_NCI // New Conn Info - sent on host only if an admin password has been set
{
	byte	Size;		// 16
	byte	Type;		// ISP_NCI
	byte	ReqI;		// 0 unless this is a reply to a TINY_NCI request
	byte	UCID;		// connection's unique id (0 = host)

	byte	Language;	// see below : Languages
	byte	Sp1;
	byte	Sp2;
	byte	Sp3;

	unsigned	UserID;		// LFS UserID
	unsigned	IPAddress;
};

struct IS_SLC // SeLected Car - sent when a connection selects a car (empty if no car)
{
	byte	Size;		// 8
	byte	Type;		// ISP_SLC
	byte	ReqI;		// 0 unless this is a reply to a TINY_SLC request
	byte	UCID;		// connection's unique id (0 = host)

	char	CName[4];	// car name
};

// NOTE : If a new guest joins and does have a car selected then an IS_SLC will be sent

struct IS_CNL // ConN Leave
{
	byte	Size;		// 8
	byte	Type;		// ISP_CNL
	byte	ReqI;		// 0
	byte	UCID;		// unique id of the connection which left

	byte	Reason;		// leave reason (see below)
	byte	Total;		// number of connections including host
	byte	Sp2;
	byte	Sp3;
};

struct IS_CPR // Conn Player Rename
{
	byte	Size;		// 36
	byte	Type;		// ISP_CPR
	byte	ReqI;		// 0
	byte	UCID;		// unique id of the connection

	char	PName[24];	// new name
	char	Plate[8];	// number plate - NO ZERO AT END!
};

struct IS_NPL // New PLayer joining race (if PLID already exists, then leaving pits)
{
	byte	Size;		// 76
	byte	Type;		// ISP_NPL
	byte	ReqI;		// 0 unless this is a reply to an TINY_NPL request
	byte	PLID;		// player's newly assigned unique id

	byte	UCID;		// connection's unique id
	byte	PType;		// bit 0 : female / bit 1 : AI / bit 2 : remote
	word	Flags;		// player flags

	char	PName[24];	// nickname
	char	Plate[8];	// number plate - NO ZERO AT END!

	char	CName[4];	// car name
	char	SName[16];	// skin name - MAX_CAR_TEX_NAME
	byte	Tyres[4];	// compounds

	byte	H_Mass;		// added mass (kg)
	byte	H_TRes;		// intake restriction
	byte	Model;		// driver model
	byte	Pass;		// passengers byte

	int		Spare;

	byte	SetF;		// setup flags (see below)
	byte	NumP;		// number in race - ZERO if this is a join request
	byte	Sp2;
	byte	Sp3;
};

// NOTE : PType bit 0 (female) is not reported on dedicated host as humans are not loaded
// You can use the driver model byte instead if required (and to force the use of helmets)

// Setup flags (for SetF byte)

#define SETF_SYMM_WHEELS	1
#define SETF_TC_ENABLE		2
#define SETF_ABS_ENABLE		4

// More...

struct IS_PLP // PLayer Pits (go to settings - stays in player list)
{
	byte	Size;		// 4
	byte	Type;		// ISP_PLP
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id
};

struct IS_PLL // PLayer Leave race (spectate - removed from player list)
{
	byte	Size;		// 4
	byte	Type;		// ISP_PLL
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id
};

struct IS_CRS // Car ReSet
{
	byte	Size;		// 4
	byte	Type;		// ISP_CRS
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id
};

struct IS_LAP // LAP time
{
	byte	Size;		// 20
	byte	Type;		// ISP_LAP
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	unsigned	LTime;	// lap time (ms)
	unsigned	ETime;	// total time (ms)

	word	LapsDone;	// laps completed
	word	Flags;		// player flags

	byte	Sp0;
	byte	Penalty;	// current penalty value (see below)
	byte	NumStops;	// number of pit stops
	byte	Sp3;
};

struct IS_SPX // SPlit X time
{
	byte	Size;		// 16
	byte	Type;		// ISP_SPX
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	unsigned	STime;	// split time (ms)
	unsigned	ETime;	// total time (ms)

	byte	Split;		// split number 1, 2, 3
	byte	Penalty;	// current penalty value (see below)
	byte	NumStops;	// number of pit stops
	byte	Sp3;
};

struct IS_PIT // PIT stop (stop at pit garage)
{
	byte	Size;		// 24
	byte	Type;		// ISP_PIT
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	word	LapsDone;	// laps completed
	word	Flags;		// player flags

	byte	Sp0;
	byte	Penalty;	// current penalty value (see below)
	byte	NumStops;	// number of pit stops
	byte	Sp3;

	byte	Tyres[4];	// tyres changed

	unsigned	Work;	// pit work
	unsigned	Spare;
};

struct IS_PSF // Pit Stop Finished
{
	byte	Size;		// 12
	byte	Type;		// ISP_PSF
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	unsigned	STime;	// stop time (ms)
	unsigned	Spare;
};

struct IS_PLA // Pit LAne
{
	byte	Size;		// 8
	byte	Type;		// ISP_PLA
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	Fact;		// pit lane fact (see below)
	byte	Sp1;
	byte	Sp2;
	byte	Sp3;
};

// IS_CCH : Camera CHange

// To track cameras you need to consider 3 points

// 1) The default camera : VIEW_DRIVER
// 2) Player flags : CUSTOM_VIEW means VIEW_CUSTOM at start or pit exit
// 3) IS_CCH : sent when an existing driver changes camera

struct IS_CCH // Camera CHange
{
	byte	Size;		// 8
	byte	Type;		// ISP_CCH
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	Camera;		// view identifier (see below)
	byte	Sp1;
	byte	Sp2;
	byte	Sp3;
};

struct IS_PEN // PENalty (given or cleared)
{
	byte	Size;		// 8
	byte	Type;		// ISP_PEN
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	OldPen;		// old penalty value (see below)
	byte	NewPen;		// new penalty value (see below)
	byte	Reason;		// penalty reason (see below)
	byte	Sp3;
};

struct IS_TOC // Take Over Car
{
	byte	Size;		// 8
	byte	Type;		// ISP_TOC
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	OldUCID;	// old connection's unique id
	byte	NewUCID;	// new connection's unique id
	byte	Sp2;
	byte	Sp3;
};

struct IS_FLG // FLaG (yellow or blue flag changed)
{
	byte	Size;		// 8
	byte	Type;		// ISP_FLG
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	OffOn;		// 0 = off / 1 = on
	byte	Flag;		// 1 = given blue / 2 = causing yellow
	byte	CarBehind;	// unique id of obstructed player
	byte	Sp3;
};

struct IS_PFL // Player FLags (help flags changed)
{
	byte	Size;		// 8
	byte	Type;		// ISP_PFL
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	word	Flags;		// player flags (see below)
	word	Spare;
};

struct IS_FIN // FINished race notification (not a final result - use IS_RES)
{
	byte	Size;		// 20
	byte	Type;		// ISP_FIN
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id (0 = player left before result was sent)

	unsigned	TTime;	// race time (ms)
	unsigned	BTime;	// best lap (ms)

	byte	SpA;
	byte	NumStops;	// number of pit stops
	byte	Confirm;	// confirmation flags : disqualified etc - see below
	byte	SpB;

	word	LapsDone;	// laps completed
	word	Flags;		// player flags : help settings etc - see below
};

struct IS_RES // RESult (qualify or confirmed finish)
{
	byte	Size;		// 84
	byte	Type;		// ISP_RES
	byte	ReqI;		// 0 unless this is a reply to a TINY_RES request
	byte	PLID;		// player's unique id (0 = player left before result was sent)

	char	UName[24];	// username
	char	PName[24];	// nickname
	char	Plate[8];	// number plate - NO ZERO AT END!
	char	CName[4];	// skin prefix

	unsigned	TTime;	// race time (ms)
	unsigned	BTime;	// best lap (ms)

	byte	SpA;
	byte	NumStops;	// number of pit stops
	byte	Confirm;	// confirmation flags : disqualified etc - see below
	byte	SpB;

	word	LapsDone;	// laps completed
	word	Flags;		// player flags : help settings etc - see below

	byte	ResultNum;	// finish or qualify pos (0 = win / 255 = not added to table)
	byte	NumRes;		// total number of results (qualify doesn't always add a new one)
	word	PSeconds;	// penalty time in seconds (already included in race time)
};

// IS_REO : REOrder - this packet can be sent in either direction

// LFS sends one at the start of every race or qualifying session, listing the start order

// You can send one to LFS in two different ways, to specify the starting order :
// 1) In the race setup screen, to immediately rearrange the grid when the packet arrives
// 2) In game, just before a restart or exit, to specify the order on the restart or exit
// If you are sending an IS_REO in game, you should send it when you receive the SMALL_VTA
// informing you that the Vote Action (VOTE_END / VOTE_RESTART / VOTE_QUALIFY) is about
// to take place.  Any IS_REO received before the SMALL_VTA is sent will be ignored.

struct IS_REO // REOrder (when race restarts after qualifying)
{
	byte	Size;		// 44
	byte	Type;		// ISP_REO
	byte	ReqI;		// 0 unless this is a reply to an TINY_REO request
	byte	NumP;		// number of players in race

	byte	PLID[40];	// all PLIDs in new order
};

// To request an IS_REO packet at any time, send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_REO		(request an IS_REO)

// Pit Lane Facts

enum
{
	PITLANE_EXIT,		// 0 - left pit lane
	PITLANE_ENTER,		// 1 - entered pit lane
	PITLANE_NO_PURPOSE,	// 2 - entered for no purpose
	PITLANE_DT,			// 3 - entered for drive-through
	PITLANE_SG,			// 4 - entered for stop-go
	PITLANE_NUM
};

// Pit Work Flags

enum
{
	PSE_NOTHING,		// bit 0 (1)
	PSE_STOP,			// bit 1 (2)
	PSE_FR_DAM,			// bit 2 (4)
	PSE_FR_WHL,			// etc...
	PSE_LE_FR_DAM,
	PSE_LE_FR_WHL,
	PSE_RI_FR_DAM,
	PSE_RI_FR_WHL,
	PSE_RE_DAM,
	PSE_RE_WHL,
	PSE_LE_RE_DAM,
	PSE_LE_RE_WHL,
	PSE_RI_RE_DAM,
	PSE_RI_RE_WHL,
	PSE_BODY_MINOR,
	PSE_BODY_MAJOR,
	PSE_SETUP,
	PSE_REFUEL,
	PSE_NUM
};

// View identifiers

enum
{
	VIEW_FOLLOW,	// 0 - arcade
	VIEW_HELI,		// 1 - helicopter
	VIEW_CAM,		// 2 - tv camera
	VIEW_DRIVER,	// 3 - cockpit
	VIEW_CUSTOM,	// 4 - custom
	VIEW_MAX
};

const int VIEW_ANOTHER = 255; // viewing another car

// Languages

enum
{
	LFS_ENGLISH,				// 0
	LFS_DEUTSCH,				// 1
	LFS_PORTUGUESE,				// 2
	LFS_FRENCH,					// 3
	LFS_SUOMI,					// 4
	LFS_NORSK,					// 5
	LFS_NEDERLANDS,				// 6
	LFS_CATALAN,				// 7
	LFS_TURKISH,				// 8
	LFS_CASTELLANO,				// 9
	LFS_ITALIANO,				// 10
	LFS_DANSK,					// 11
	LFS_CZECH,					// 12
	LFS_RUSSIAN,				// 13
	LFS_ESTONIAN,				// 14
	LFS_SERBIAN,				// 15
	LFS_GREEK,					// 16
	LFS_POLSKI,					// 17
	LFS_CROATIAN,				// 18
	LFS_HUNGARIAN,				// 19
	LFS_BRAZILIAN,				// 20
	LFS_SWEDISH,				// 21
	LFS_SLOVAK,					// 22
	LFS_GALEGO,					// 23
	LFS_SLOVENSKI,				// 24
	LFS_BELARUSSIAN,			// 25
	LFS_LATVIAN,				// 26
	LFS_LITHUANIAN,				// 27
	LFS_TRADITIONAL_CHINESE,	// 28
	LFS_SIMPLIFIED_CHINESE,		// 29
	LFS_JAPANESE,				// 30
	LFS_KOREAN,					// 31
	LFS_BULGARIAN,				// 32
	LFS_LATINO,					// 33
	LFS_UKRAINIAN,				// 34
	LFS_INDONESIAN,				// 35
	LFS_ROMANIAN,				// 36
	LFS_NUM_LANG				// 37
};

// Leave reasons

enum
{
	LEAVR_DISCO,		// 0 - none
	LEAVR_TIMEOUT,		// 1 - timed out
	LEAVR_LOSTCONN,		// 2 - lost connection
	LEAVR_KICKED,		// 3 - kicked
	LEAVR_BANNED,		// 4 - banned
	LEAVR_SECURITY,		// 5 - security
	LEAVR_CPW,			// 6 - cheat protection wrong
	LEAVR_OOS,			// 7 - out of sync with host
	LEAVR_JOOS,			// 8 - join OOS (initial sync failed)
	LEAVR_HACK,			// 9 - invalid packet
	LEAVR_NUM
};

// Penalty values (VALID means the penalty can now be cleared)

enum
{
	PENALTY_NONE,		// 0		
	PENALTY_DT,			// 1
	PENALTY_DT_VALID,	// 2
	PENALTY_SG,			// 3
	PENALTY_SG_VALID,	// 4
	PENALTY_30,			// 5
	PENALTY_45,			// 6
	PENALTY_NUM
};

// Penalty reasons

enum
{
	PENR_UNKNOWN,		// 0 - unknown or cleared penalty
	PENR_ADMIN,			// 1 - penalty given by admin
	PENR_WRONG_WAY,		// 2 - wrong way driving
	PENR_FALSE_START,	// 3 - starting before green light
	PENR_SPEEDING,		// 4 - speeding in pit lane
	PENR_STOP_SHORT,	// 5 - stop-go pit stop too short
	PENR_STOP_LATE,		// 6 - compulsory stop is too late
	PENR_NUM
};

// Player flags

#define PIF_SWAPSIDE		1
#define PIF_RESERVED_2		2
#define PIF_RESERVED_4		4
#define PIF_AUTOGEARS		8
#define PIF_SHIFTER			16
#define PIF_RESERVED_32		32
#define PIF_HELP_B			64
#define PIF_AXIS_CLUTCH		128
#define PIF_INPITS			256
#define PIF_AUTOCLUTCH		512
#define PIF_MOUSE			1024
#define PIF_KB_NO_HELP		2048
#define PIF_KB_STABILISED	4096
#define PIF_CUSTOM_VIEW		8192

// Tyre compounds (4 byte order : rear L, rear R, front L, front R)

enum
{
	TYRE_R1,			// 0
	TYRE_R2,			// 1
	TYRE_R3,			// 2
	TYRE_R4,			// 3
	TYRE_ROAD_SUPER,	// 4
	TYRE_ROAD_NORMAL,	// 5
	TYRE_HYBRID,		// 6
	TYRE_KNOBBLY,		// 7
	TYRE_NUM
};

const int NOT_CHANGED = 255;

// Confirmation flags

#define CONF_MENTIONED		1
#define CONF_CONFIRMED		2
#define CONF_PENALTY_DT		4
#define CONF_PENALTY_SG		8
#define CONF_PENALTY_30		16
#define CONF_PENALTY_45		32
#define CONF_DID_NOT_PIT	64

#define CONF_DISQ	(CONF_PENALTY_DT | CONF_PENALTY_SG | CONF_DID_NOT_PIT)
#define CONF_TIME	(CONF_PENALTY_30 | CONF_PENALTY_45)

// Race flags

// HOSTF_CAN_VOTE		1
// HOSTF_CAN_SELECT		2
// HOSTF_MID_RACE		32
// HOSTF_MUST_PIT		64
// HOSTF_CAN_RESET		128
// HOSTF_FCV			256
// HOSTF_CRUISE			512

// Passengers byte

// bit 0 female
// bit 1 front
// bit 2 female
// bit 3 rear left
// bit 4 female
// bit 5 rear middle
// bit 6 female
// bit 7 rear right


// TRACKING PACKET REQUESTS
// ========================

// To request players, connections, results or a single NLP or MCI, send an IS_TINY

// In each case, ReqI must be non-zero, and will be returned in the reply packet

// SubT : TINT_NCN - request all connections
// SubT : TINY_NPL - request all players
// SubT : TINY_RES - request all results
// SubT : TINY_NLP - request a single IS_NLP
// SubT : TINY_MCI - request a set of IS_MCI


// OBJECT INFO - for autocross objects - used in some packets and the layout file
// ===========

struct ObjectInfo // Info about a single object - explained in the layout file format
{
	short	X;
	short	Y;

	byte	Zbyte;
	byte	Flags;
	byte	Index;
	byte	Heading;
};


// JOIN REQUEST - allows external program to decide if a player can join
// ============

// Set the ISF_REQ_JOIN flag in the IS_ISI to receive join requests
// A join request is seen as an IS_NPL packet with ZERO in the NumP field
// An immediate response (e.g. within 1 second) is required using an IS_JRR packet

// In this case, PLID must be zero and JRRAction must be JRR_REJECT or JRR_SPAWN
// If you allow the join and it is successful you will then get a normal IS_NPL with NumP set
// You can also specify the start position of the car using the StartPos structure

// IS_JRR can also be used to move an existing car to a different location
// In this case, PLID must be set, JRRAction must be JRR_RESET or higher and StartPos must be set

struct IS_JRR // Join Request Reply - send one of these back to LFS in response to a join request
{
	byte	Size;		// 16
	byte	Type;		// ISP_JRR
	byte	ReqI;		// 0
	byte	PLID;		// ZERO when this is a reply to a join request - SET to move a car

	byte	UCID;		// set when this is a reply to a join request - ignored when moving a car
	byte	JRRAction;	// 1 - allow / 0 - reject (should send message to user)
	byte	Sp2;
	byte	Sp3;

	ObjectInfo	StartPos; // 0 : use default start point / Flags = 0x80 : set start point
};

// To use default start point, StartPos should be filled with zero values

// To specify a start point, StartPos X, Y, Zbyte and Heading should be filled like an autocross
// start position, Flags should be 0x80 and Index should be zero

// Values for JRRAction byte

enum
{
	JRR_REJECT,
	JRR_SPAWN,
	JRR_2,
	JRR_3,
	JRR_RESET,
	JRR_RESET_NO_REPAIR,
	JRR_6,
	JRR_7,
};


// AUTOCROSS
// =========

// When all objects are cleared from a layout, LFS sends this IS_TINY :

// ReqI : 0
// SubT : TINY_AXC		(AutoX Cleared)

// You can request information about the current layout with this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_AXI		(AutoX Info)

// The information will be sent back in this packet (also sent when a layout is loaded) :

struct IS_AXI // AutoX Info
{
	byte	Size;		// 40
	byte	Type;		// ISP_AXI
	byte	ReqI;		// 0 unless this is a reply to an TINY_AXI request
	byte	Zero;

	byte	AXStart;	// autocross start position
	byte	NumCP;		// number of checkpoints
	word	NumO;		// number of objects

	char	LName[32];	// the name of the layout last loaded (if loaded locally)
};

// On false start or wrong route / restricted area, an IS_PEN packet is sent :

// False start : OldPen = 0 / NewPen = PENALTY_30 / Reason = PENR_FALSE_START
// Wrong route : OldPen = 0 / NewPen = PENALTY_45 / Reason = PENR_WRONG_WAY

// If an autocross object is hit (2 second time penalty) this packet is sent :

struct IS_AXO // AutoX Object
{
	byte	Size;		// 4
	byte	Type;		// ISP_AXO
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id
};


// CAR TRACKING - car position info sent at constant intervals
// ============

// IS_NLP - compact, all cars in 1 variable sized packet
// IS_MCI - detailed, max 8 cars per variable sized packet

// To receive IS_NLP or IS_MCI packets at a specified interval :

// 1) Set the Interval field in the IS_ISI (InSimInit) packet (40, 50, 60... 8000 ms)
// 2) Set one of the flags ISF_NLP or ISF_MCI in the IS_ISI packet

// If ISF_NLP flag is set, one IS_NLP packet is sent...

struct NodeLap // Car info in 6 bytes - there is an array of these in the NLP (below)
{
	word	Node;		// current path node
	word	Lap;		// current lap
	byte	PLID;		// player's unique id
	byte	Position;	// current race position : 0 = unknown, 1 = leader, etc...
};

struct IS_NLP // Node and Lap Packet - variable size
{
	byte	Size;		// 4 + NumP * 6 (PLUS 2 if needed to make it a multiple of 4)
	byte	Type;		// ISP_NLP
	byte	ReqI;		// 0 unless this is a reply to an TINY_NLP request
	byte	NumP;		// number of players in race

	NodeLap	Info[40];	// node and lap of each player, 1 to 40 of these (NumP)
};

// If ISF_MCI flag is set, a set of IS_MCI packets is sent...

struct CompCar // Car info in 28 bytes - there is an array of these in the MCI (below)
{
	word	Node;		// current path node
	word	Lap;		// current lap
	byte	PLID;		// player's unique id
	byte	Position;	// current race position : 0 = unknown, 1 = leader, etc...
	byte	Info;		// flags and other info - see below
	byte	Sp3;
	int		X;			// X map (65536 = 1 metre)
	int		Y;			// Y map (65536 = 1 metre)
	int		Z;			// Z alt (65536 = 1 metre)
	word	Speed;		// speed (32768 = 100 m/s)
	word	Direction;	// car's motion if Speed > 0 : 0 = world y direction, 32768 = 180 deg
	word	Heading;	// direction of forward axis : 0 = world y direction, 32768 = 180 deg
	short	AngVel;		// signed, rate of change of heading : (16384 = 360 deg/s)
};

// NOTE 1) Info byte - the bits in this byte have the following meanings :

#define CCI_BLUE		1		// this car is in the way of a driver who is a lap ahead
#define CCI_YELLOW		2		// this car is slow or stopped and in a dangerous place

#define CCI_LAG			32		// this car is lagging (missing or delayed position packets)

#define CCI_FIRST		64		// this is the first compcar in this set of MCI packets
#define CCI_LAST		128		// this is the last compcar in this set of MCI packets

// NOTE 2) Heading : 0 = world y axis direction, 32768 = 180 degrees, anticlockwise from above
// NOTE 3) AngVel  : 0 = no change in heading,    8192 = 180 degrees per second anticlockwise

struct IS_MCI // Multi Car Info - if more than 8 in race then more than one of these is sent
{
	byte	Size;		// 4 + NumC * 28
	byte	Type;		// ISP_MCI
	byte	ReqI;		// 0 unless this is a reply to an TINY_MCI request
	byte	NumC;		// number of valid CompCar structs in this packet

	CompCar	Info[8];	// car info for each player, 1 to 8 of these (NumC)
};

// You can change the rate of NLP or MCI after initialisation by sending this IS_SMALL :

// ReqI : 0
// SubT : SMALL_NLI		(Node Lap Interval)
// UVal : interval      (0 means stop, otherwise time interval : 40, 50, 60... 8000 ms)


// CONTACT - reports contacts between two cars if the closing speed is above 0.25 m/s
// =======

// Set the ISF_CON flag in the IS_ISI to receive car contact reports

struct CarContact // 16 bytes : one car in a contact - two of these in the IS_CON (below)
{
	byte	PLID;
	byte	Info;		// like Info byte in CompCar (CCI_BLUE / CCI_YELLOW / CCI_LAG)
	byte	Sp2;		// spare
	char	Steer;		// front wheel steer in degrees (right positive)
	
	byte	ThrBrk;		// high 4 bits : throttle    / low 4 bits : brake (0 to 15)
	byte	CluHan;		// high 4 bits : clutch      / low 4 bits : handbrake (0 to 15)
	byte	GearSp;		// high 4 bits : gear (15=R) / low 4 bits : spare
	byte	Speed;		// m/s

	byte	Direction;	// car's motion if Speed > 0 : 0 = world y direction, 128 = 180 deg
	byte	Heading;	// direction of forward axis : 0 = world y direction, 128 = 180 deg
	char	AccelF;		// m/s^2 longitudinal acceleration (forward positive)
	char	AccelR;		// m/s^2 lateral acceleration (right positive)

	short	X;			// position (1 metre = 16)
	short	Y;			// position (1 metre = 16)
};

struct IS_CON // CONtact - between two cars (A and B are sorted by PLID)
{
	byte	Size;		// 40
	byte	Type;		// ISP_CON
	byte	ReqI;		// 0
	byte	Zero;

	word	SpClose;	// high 4 bits : reserved / low 12 bits : closing speed (10 = 1 m/s)
	word	Time;		// looping time stamp (hundredths - time since reset - like TINY_GTH)

	CarContact	A;
	CarContact	B;
};

// Set the ISF_OBH flag in the IS_ISI to receive object contact reports

struct CarContOBJ // 8 bytes : car in a contact with an object
{
	byte	Direction;	// car's motion if Speed > 0 : 0 = world y direction, 128 = 180 deg
	byte	Heading;	// direction of forward axis : 0 = world y direction, 128 = 180 deg
	byte	Speed;		// m/s
	byte	Zbyte;

	short	X;			// position (1 metre = 16)
	short	Y;			// position (1 metre = 16)
};

struct IS_OBH // OBject Hit - car hit an autocross object or an unknown object
{
	byte	Size;		// 24
	byte	Type;		// ISP_OBH
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	word	SpClose;	// high 4 bits : reserved / low 12 bits : closing speed (10 = 1 m/s)
	word	Time;		// looping time stamp (hundredths - time since reset - like TINY_GTH)

	CarContOBJ	C;

	short	X;			// as in ObjectInfo
	short	Y;			// as in ObjectInfo

	byte	Zbyte;		// if OBH_LAYOUT is set : Zbyte as in ObjectInfo
	byte	Sp1;
	byte	Index;		// AXO_x as in ObjectInfo or zero if it is an unknown object
	byte	OBHFlags;	// see below
};

// OBHFlags byte

#define OBH_LAYOUT		1		// an added object
#define OBH_CAN_MOVE	2		// a movable object
#define OBH_WAS_MOVING	4		// was moving before this hit
#define OBH_ON_SPOT		8		// object in original position

// Set the ISF_HLV flag in the IS_ISI to receive reports of incidents that would violate HLVC

struct IS_HLV // Hot Lap Validity - off track / hit wall / speeding in pits / out of bounds
{
	byte	Size;		// 16
	byte	Type;		// ISP_HLV
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	HLVC;		// 0 : ground / 1 : wall / 4 : speeding / 5 : out of bounds
	byte	Sp1;
	word	Time;		// looping time stamp (hundredths - time since reset - like TINY_GTH)

	CarContOBJ	C;
};


// CONTROL - reports crossing an InSim checkpoint / entering an InSim circle (from layout)
// =======

struct IS_UCO // User Control Object
{
	byte	Size;		// 28
	byte	Type;		// ISP_UCO
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	Sp0;
	byte	UCOAction;
	byte	Sp2;
	byte	Sp3;

	unsigned	Time;	// hundredths of a second since start (as in SMALL_RTP)
	
	CarContOBJ	C;

	ObjectInfo	Info;	// Info about the checkpoint or circle (see below)
};

// UCOAction byte

enum
{
	UCO_CIRCLE_ENTER,	// entered a circle
	UCO_CIRCLE_LEAVE,	// left a circle
	UCO_CP_FWD,			// crossed cp in forward direction
	UCO_CP_REV,			// crossed cp in reverse direction
};

// Identifying an InSim checkpoint from the ObjectInfo :

// Index is 252.  Checkpoint index (seen in the autocross editor) is stored in Flags bits 0 and 1

// 00 = finish line
// 01 = 1st checkpoint
// 10 = 2nd checkpoint
// 11 = 3rd checkpoint

// Note that the checkpoint index has no meaning in LFS and is provided only for your convenience.
// If you use many InSim checkpoints you may need to identify them with the X and Y values.

// Identifying an InSim circle from the ObjectInfo :

// Index is 253.  The circle index (seen in the autocross editor) is stored in the Heading byte.

struct IS_CSC // Car State Changed - reports a change in a car's state (currently start or stop)
{
	byte	Size;		// 20
	byte	Type;		// ISP_CSC
	byte	ReqI;		// 0
	byte	PLID;		// player's unique id

	byte	Sp0;
	byte	CSCAction;
	byte	Sp2;
	byte	Sp3;

	unsigned	Time;	// hundredths of a second since start (as in SMALL_RTP)

	CarContOBJ	C;
};

// CSCAction byte

enum
{
	CSC_STOP,
	CSC_START,
};


// OBJECT CONTROL - currently used for switching start lights
// ==============

struct IS_OCO // Object COntrol
{
	byte	Size;		// 8
	byte	Type;		// ISP_OCO
	byte	ReqI;		// 0
	byte	Zero;

	byte	OCOAction;	// see below
	byte	Index;		// see below
	byte	Identifier;	// identify particular start lights objects (0 to 63 or 255 = all)
	byte	Data;		// see below
};

// OCOAction byte

enum
{
	OCO_ZERO,			// reserved
	OCO_1,				//
	OCO_2,				//
	OCO_3,				//
	OCO_LIGHTS_RESET,	// give up control of all lights
	OCO_LIGHTS_SET,		// use Data byte to set the bulbs
	OCO_LIGHTS_UNSET,	// give up control of the specified lights
	OCO_NUM
};

// Index byte specifies which lights you want to override

// Currently the following values are supported :

// AXO_START_LIGHTS (149)	// overrides temporary start lights in the layout
#define OCO_INDEX_MAIN 240	// special value to override the main start light system

// Identifier byte can be used to override groups of temporary start lights

// It refers to the temporary lights identifier (0 to 63) seen in the layout editor

// Data byte specifies particular bulbs using the low 4 bits

// Bulb bit values for the currently available lights :

// OCO_INDEX_MAIN		AXO_START_LIGHTS

// bit 0 (1) : red1		bit 0 (1) : red
// bit 1 (2) : red2		bit 1 (2) : amber
// bit 2 (4) : red3		-
// bit 3 (8) : green	bit 3 (8) : green


// AUTOCROSS OBJECTS - reporting / adding / removing
// =================

// Set the ISF_AXM_LOAD flag in the IS_ISI for info about objects when a layout is loaded.
// Set the ISF_AXM_EDIT flag in the IS_ISI for info about objects edited by user or InSim.

// You can also add or remove objects by sending IS_AXM packets.
// Some care must be taken with these - please read the notes below.

// You can also get (TTC_SEL) or set (PMO_SELECTION) the current editor selection.

struct IS_AXM // AutoX Multiple objects - variable size
{
	byte	Size;		// 8 + NumO * 8
	byte	Type;		// ISP_AXM
	byte	ReqI;		// 0 unless this is a reply to a TINY_AXM request
	byte	NumO;		// number of objects in this packet

	byte	UCID;		// unique id of the connection that sent the packet
	byte	PMOAction;	// see below
	byte	PMOFlags;	// see below
	byte	Sp3;

	ObjectInfo	Info[30];	// info about each object, 0 to 30 of these
};

// Values for PMOAction byte

enum
{
	PMO_LOADING_FILE,	// 0 - sent by the layout loading system only
	PMO_ADD_OBJECTS,	// 1 - adding objects (from InSim or editor)
	PMO_DEL_OBJECTS,	// 2 - delete objects (from InSim or editor)
	PMO_CLEAR_ALL,		// 3 - clear all objects (NumO must be zero)
	PMO_TINY_AXM,		// 4 - a reply to a TINY_AXM request
	PMO_TTC_SEL,		// 5 - a reply to a TTC_SEL request
	PMO_SELECTION,		// 6 - set a connection's layout editor selection
	PMO_NUM
};

// Info about the PMOFlags byte :

#define PMO_FILE_END			1
#define PMO_SUPPRESS_WARNINGS	2

// If PMO_FILE_END is set in a PMO_LOADING_FILE packet, LFS has reached the end of
// a layout file which it is loading.  The added objects will then be optimised.

// Optimised in this case means that static vertex buffers will be created for all
// objects, to greatly improve the frame rate.  The problem with this is that when
// there are many objects loaded, optimisation causes a significant glitch which can
// be long enough to cause a driver who is cornering to lose control and crash.

// PMO_FILE_END can also be set in an IS_AXM with PMOAction of PMO_ADD_OBJECTS.
// This causes all objects to be optimised.  It is important not to set PMO_FILE_END
// in every packet you send to add objects or you will cause severe glitches on the
// clients computers.  It is ok to have some objects on the track which are not
// optimised.  So if you have a few objects that are being removed and added
// occasionally, the best advice is not to request optimisation at all.  Only
// request optimisation (by setting PMO_FILE_END) if you have added so many objects
// that it is needed to improve the frame rate.

// NOTE 1) LFS makes sure that all objects are optimised when the race restarts.
// NOTE 2) In the 'more' section of SHIFT+U there is info about optimised objects.

// If you are using InSim to send many packets of objects (for example loading an
// entire layout through InSim) then you must take care of the bandwidth and buffer
// overflows.  You must not try to send all the objects at once.  It's probably good
// to use LFS's method of doing this : send the first packet of objects then wait for
// the corresponding IS_AXM that will be output when the packet is processed.  Then
// you can send the second packet and again wait for the IS_AXM and so on.

// To request IS_AXM packets for all layout objects and circles send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_AXM		(request IS_AXM packets for the entire layout)

// LFS will send as many IS_AXM packets as needed to describe the whole layout.
// If there are no objects or circles, there will be one IS_AXM with zero NumO.
// The final IS_AXM packet will have the PMO_FILE_END flag set.

// To request an IS_AXM for a connection's layout editor selection send this IS_TTC :

// ReqI : non-zero		(returned in the reply)
// SubT : TTC_SEL		(request an IS_AXM for the current selection)
// UCID : connection	(0 = local / non-zero = guest)


// CAR POSITION PACKETS (Initialising OutSim from InSim - See "OutSim" below)
// ====================

// To request Car Positions from the currently viewed car, send this IS_SMALL :

// ReqI : 0
// SubT : SMALL_SSP		(Start Sending Positions)
// UVal : interval		(time between updates - zero means stop sending)

// If OutSim has not been setup in cfg.txt, the SSP packet makes LFS send UDP packets
// if in game, using the OutSim system as documented near the end of this text file.

// You do not need to set any OutSim values in LFS cfg.txt - OutSim is fully
// initialised by the SSP packet.

// The OutSim packets will be sent to the UDP port specified in the InSimInit packet.

// NOTE : OutSim packets are not InSim packets and don't have a 4-byte header.


// DASHBOARD PACKETS (Initialising OutGauge from InSim - See "OutGauge" below)
// =================

// To request Dashboard Packets from the currently viewed car, send this IS_SMALL :

// ReqI : 0
// SubT : SMALL_SSG		(Start Sending Gauges)
// UVal : interval		(time between updates - zero means stop sending)

// If OutGauge has not been setup in cfg.txt, the SSG packet makes LFS send UDP packets
// if in game, using the OutGauge system as documented near the end of this text file.

// You do not need to set any OutGauge values in LFS cfg.txt - OutGauge is fully
// initialised by the SSG packet.

// The OutGauge packets will be sent to the UDP port specified in the InSimInit packet.

// NOTE : OutGauge packets are not InSim packets and don't have a 4-byte header.


// CAMERA CONTROL
// ==============

// IN GAME camera control
// ----------------------

// You can set the viewed car and selected camera directly with a special packet
// These are the states normally set in game by using the TAB and V keys

struct IS_SCC // Set Car Camera - Simplified camera packet (not SHIFT+U mode)
{
	byte	Size;		// 8
	byte	Type;		// ISP_SCC
	byte	ReqI;		// 0
	byte	Zero;

	byte	ViewPLID;	// Unique ID of player to view
	byte	InGameCam;	// InGameCam (as reported in StatePack)
	byte	Sp2;
	byte	Sp3;
};

// NOTE : Set InGameCam or ViewPLID to 255 to leave that option unchanged.

// DIRECT camera control
// ---------------------

// A Camera Position Packet can be used for LFS to report a camera position and state.
// An InSim program can also send one to set LFS camera position in game or SHIFT+U mode.

// Type : "Vec" : 3 ints (X, Y, Z) - 65536 means 1 metre

struct IS_CPP // Cam Pos Pack - Full camera packet (in car OR SHIFT+U mode)
{
	byte	Size;		// 32
	byte	Type;		// ISP_CPP
	byte	ReqI;		// instruction : 0 / or reply : ReqI as received in the TINY_SCP
	byte	Zero;

	Vec		Pos;		// Position vector

	word	H;			// heading - 0 points along Y axis
	word	P;			// pitch
	word	R;			// roll

	byte	ViewPLID;	// Unique ID of viewed player (0 = none)
	byte	InGameCam;	// InGameCam (as reported in StatePack)

	float	FOV;		// 4-byte float : FOV in degrees

	word	Time;		// Time in ms to get there (0 means instant)
	word	Flags;		// ISS state flags (see below)
};

// The ISS state flags that can be set are :

// ISS_SHIFTU			- in SHIFT+U mode
// ISS_SHIFTU_FOLLOW	- FOLLOW view
// ISS_VIEW_OVERRIDE	- override user view

// On receiving this packet, LFS will set up the camera to match the values in the packet,
// including switching into or out of SHIFT+U mode depending on the ISS_SHIFTU flag.

// If ISS_VIEW_OVERRIDE is set, the in-car view Heading Pitch and Roll (but not FOV) will
// be taken from the values in this packet.  Otherwise normal in game control will be used.

// Position vector (Vec Pos) - in SHIFT+U mode, Pos can be either relative or absolute.

// If ISS_SHIFTU_FOLLOW is set, it's a following camera, so the position is relative to
// the selected car.  Otherwise, the position is absolute, as used in normal SHIFT+U mode.

// NOTE : Set InGameCam or ViewPLID to 255 to leave that option unchanged.

// SMOOTH CAMERA POSITIONING
// --------------------------

// The "Time" value in the packet is used for camera smoothing.  A zero Time means instant
// positioning.  Any other value (milliseconds) will cause the camera to move smoothly to
// the requested position in that time.  This is most useful in SHIFT+U camera modes or
// for smooth changes of internal view when using the ISS_VIEW_OVERRIDE flag.

// NOTE : You can use frequently updated camera positions with a longer Time value than
// the update frequency.  For example, sending a camera position every 100 ms, with a
// Time value of 1000 ms.  LFS will make a smooth motion from the rough inputs.

// If the requested camera mode is different from the one LFS is already in, it cannot
// move smoothly to the new position, so in this case the "Time" value is ignored.

// GETTING A CAMERA PACKET
// -----------------------

// To GET a CamPosPack from LFS, send this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_SCP		(Send Cam Pos)

// LFS will reply with a CamPosPack as described above.  You can store this packet
// and later send back exactly the same packet to LFS and it will try to replicate
// that camera position.


// TIME CONTROL
// ============

// Request the current time at any point with this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_GTH		(Get Time in Hundredths)

// The time will be sent back in this IS_SMALL :

// ReqI : non-zero		(as received in the request packet)
// SubT : SMALL_RTP		(Race Time Packet)
// UVal	: Time			(hundredths of a second since start of race or replay)

// You can stop or start time in LFS and while it is stopped you can send packets to move
// time in steps.  Time steps are specified in hundredths of a second.
// Warning : unlike pausing, this is a "trick" to LFS and the program is unaware of time
// passing so you must not leave it stopped because LFS is unusable in that state.
// This packet is not available in live multiplayer mode.

// Stop and Start with this IS_SMALL :

// ReqI : 0
// SubT : SMALL_TMS		(TiMe Stop)
// UVal	: stop			(1 - stop / 0 - carry on)

// When STOPPED, make time step updates with this IS_SMALL :

// ReqI : 0
// SubT : SMALL_STP		(STeP)
// UVal : number		(number of hundredths of a second to update)


// REPLAY CONTROL
// ==============

// You can load a replay or set the position in a replay with an IS_RIP packet.
// Replay positions and lengths are specified in hundredths of a second.
// LFS will reply with another IS_RIP packet when the request is completed.

struct IS_RIP // Replay Information Packet
{
	byte	Size;		// 80
	byte	Type;		// ISP_RIP
	byte	ReqI;		// request : non-zero / reply : same value returned
	byte	Error;		// 0 or 1 = OK / other values are listed below

	byte	MPR;		// 0 = SPR / 1 = MPR
	byte	Paused;		// request : pause on arrival / reply : paused state
	byte	Options;	// various options - see below
	byte	Sp3;

	unsigned	CTime;	// (hundredths) request : destination / reply : position
	unsigned	TTime;	// (hundredths) request : zero / reply : replay length

	char	RName[64];	// zero or replay name - last byte must be zero
};

// NOTE about RName :
// In a request, replay RName will be loaded.  If zero then the current replay is used.
// In a reply, RName is the name of the current replay, or zero if no replay is loaded.

// You can request an IS_RIP packet at any time with this IS_TINY :

// ReqI : non-zero		(returned in the reply)
// SubT : TINY_RIP		(Replay Information Packet)

// Error codes returned in IS_RIP replies :

enum
{
	RIP_OK,				//  0 - OK : completed instruction
	RIP_ALREADY,		//  1 - OK : already at the destination
	RIP_DEDICATED,		//  2 - can't run a replay - dedicated host
	RIP_WRONG_MODE,		//  3 - can't start a replay - not in a suitable mode
	RIP_NOT_REPLAY,		//  4 - RName is zero but no replay is currently loaded
	RIP_CORRUPTED,		//  5 - IS_RIP corrupted (e.g. RName does not end with zero)
	RIP_NOT_FOUND,		//  6 - the replay file was not found
	RIP_UNLOADABLE,		//  7 - obsolete / future / corrupted
	RIP_DEST_OOB,		//  8 - destination is beyond replay length
	RIP_UNKNOWN,		//  9 - unknown error found starting replay
	RIP_USER,			// 10 - replay search was terminated by user
	RIP_OOS,			// 11 - can't reach destination - SPR is out of sync
};

// Options byte : some options

#define RIPOPT_LOOP			1		// replay will loop if this bit is set
#define RIPOPT_SKINS		2		// set this bit to download missing skins
#define RIPOPT_FULL_PHYS	4		// use full physics when searching an MPR

// NOTE : RIPOPT_FULL_PHYS makes MPR searching much slower so should not normally be used.
// This flag was added to allow high accuracy MCI packets to be output when fast forwarding.


// SCREENSHOTS
// ===========

// You can instuct LFS to save a screenshot in data\shots using the IS_SSH packet.
// It will be saved as bmp / jpg / png as set in Misc Options.
// Name can be a filename (excluding extension) or zero - LFS will create a name.
// LFS will reply with another IS_SSH when the request is completed.

struct IS_SSH // ScreenSHot
{
	byte	Size;		// 40
	byte	Type;		// ISP_SSH
	byte	ReqI;		// request : non-zero / reply : same value returned
	byte	Error;		// 0 = OK / other values are listed below

	byte	Sp0;		// 0
	byte	Sp1;		// 0
	byte	Sp2;		// 0
	byte	Sp3;		// 0

	char	Name[32];	// name of screenshot file - last byte must be zero
};

// Error codes returned in IS_SSH replies :

enum
{
	SSH_OK,				//  0 - OK : completed instruction
	SSH_DEDICATED,		//  1 - can't save a screenshot - dedicated host
	SSH_CORRUPTED,		//  2 - IS_SSH corrupted (e.g. Name does not end with zero)
	SSH_NO_SAVE,		//  3 - could not save the screenshot
};


// BUTTONS
// =======

// You can make up to 240 buttons appear on the host or guests (ID = 0 to 239).
// You should set the ISF_LOCAL flag (in IS_ISI) if your program is not a host control
// system, to make sure your buttons do not conflict with any buttons sent by the host.

// LFS can display normal buttons in these four screens :

// - main entry screen
// - race setup screen
// - in game
// - SHIFT+U mode

// The recommended area for most buttons is defined by :

#define IS_X_MIN 0
#define IS_X_MAX 110

#define IS_Y_MIN 30
#define IS_Y_MAX 170

// If you draw buttons in this area, the area will be kept clear to
// avoid overlapping LFS buttons with your InSim program's buttons.
// Buttons outside that area will not have a space kept clear.
// You can also make buttons visible in all screens - see below.

// To delete one button or a range of buttons or clear all buttons, send this packet :

struct IS_BFN // Button FunctioN - delete buttons / receive button requests
{
	byte	Size;		// 8
	byte	Type;		// ISP_BFN
	byte	ReqI;		// 0
	byte	SubT;		// subtype, from BFN_ enumeration (see below)

	byte	UCID;		// connection to send to or received from (0 = local / 255 = all)
	byte	ClickID;	// if SubT is BFN_DEL_BTN : ID of single button to delete or first button in range
	byte	ClickMax;	// if SubT is BFN_DEL_BTN : ID of last button in range (if greater than ClickID)
	byte	Inst;		// used internally by InSim
};

enum // the fourth byte of IS_BFN packets is one of these
{
	BFN_DEL_BTN,		//  0 - instruction     : delete one button or range of buttons (must set ClickID)
	BFN_CLEAR,			//  1 - instruction		: clear all buttons made by this insim instance
	BFN_USER_CLEAR,		//  2 - info            : user cleared this insim instance's buttons
	BFN_REQUEST,		//  3 - user request    : SHIFT+B or SHIFT+I - request for buttons
};

// NOTE : BFN_REQUEST allows the user to bring up buttons with SHIFT+B or SHIFT+I

// SHIFT+I clears all host buttons if any - or sends a BFN_REQUEST to host instances
// SHIFT+B is the same but for local buttons and local instances

// To send a button to LFS, send this variable sized packet

struct IS_BTN // BuTtoN - button header - followed by 0 to 240 characters
{
	byte	Size;		// 12 + TEXT_SIZE (a multiple of 4)
	byte	Type;		// ISP_BTN
	byte	ReqI;		// non-zero (returned in IS_BTC and IS_BTT packets)
	byte	UCID;		// connection to display the button (0 = local / 255 = all)

	byte	ClickID;	// button ID (0 to 239)
	byte	Inst;		// some extra flags - see below
	byte	BStyle;		// button style flags - see below
	byte	TypeIn;		// max chars to type in - see below

	byte	L;			// left   : 0 - 200
	byte	T;			// top    : 0 - 200
	byte	W;			// width  : 0 - 200
	byte	H;			// height : 0 - 200

//	char	Text[TEXT_SIZE]; // 0 to 240 characters of text
};

// ClickID byte : this value is returned in IS_BTC and IS_BTT packets.

// Host buttons and local buttons are stored separately, so there is no chance of a conflict between
// a host control system and a local system (although the buttons could overlap on screen).

// Programmers of local InSim programs may wish to consider using a configurable button range and
// possibly screen position, in case their users will use more than one local InSim program at once.

// TypeIn byte : if set, the user can click this button to type in text.

// Lowest 7 bits are the maximum number of characters to type in (0 to 95)
// Highest bit (128) can be set to initialise dialog with the button's text

// On clicking the button, a text entry dialog will be opened, allowing the specified number of
// characters to be typed in.  The caption on the text entry dialog is optionally customisable using
// Text in the IS_BTN packet.  If the first character of IS_BTN's Text field is zero, LFS will read
// the caption up to the second zero.  The visible button text then follows that second zero.

// Text : 65-66-67-0 would display button text "ABC" and no caption

// Text : 0-65-66-67-0-68-69-70-71-0-0-0 would display button text "DEFG" and caption "ABC"

// Inst byte : mainly used internally by InSim but also provides some extra user flags

#define INST_ALWAYS_ON	128		// if this bit is set the button is visible in all screens

// NOTE : You should not use INST_ALWAYS_ON for most buttons.  This is a special flag for buttons
// that really must be on in all screens (including the garage and options screens).  You will
// probably need to confine these buttons to the top or bottom edge of the screen, to avoid
// overwriting LFS buttons.  Most buttons should be defined without this flag, and positioned
// in the recommended area so LFS can keep a space clear in the main screens.

// BStyle byte : style flags for the button

#define ISB_C1			1		// you can choose a standard
#define ISB_C2			2		// interface colour using
#define ISB_C4			4		// these 3 lowest bits - see below
#define ISB_CLICK		8		// click this button to send IS_BTC
#define ISB_LIGHT		16		// light button
#define ISB_DARK		32		// dark button
#define ISB_LEFT		64		// align text to left
#define ISB_RIGHT		128		// align text to right

// colour 0 : light grey		(not user editable)
// colour 1 : title colour		(default:yellow)
// colour 2 : unselected text	(default:black)
// colour 3 : selected text		(default:white)
// colour 4 : ok				(default:green)
// colour 5 : cancel			(default:red)
// colour 6 : text string		(default:pale blue)
// colour 7 : unavailable		(default:grey)

// NOTE : If width or height are zero, this would normally be an invalid button.  But in that case if
// there is an existing button with the same ClickID, all the packet contents are ignored except the
// Text field.  This can be useful for updating the text in a button without knowing its position.
// For example, you might reply to an IS_BTT using an IS_BTN with zero W and H to update the text.

// Replies : If the user clicks on a clickable button, this packet will be sent :

struct IS_BTC // BuTton Click - sent back when user clicks a button
{
	byte	Size;		// 8
	byte	Type;		// ISP_BTC
	byte	ReqI;		// ReqI as received in the IS_BTN
	byte	UCID;		// connection that clicked the button (zero if local)

	byte	ClickID;	// button identifier originally sent in IS_BTN
	byte	Inst;		// used internally by InSim
	byte	CFlags;		// button click flags - see below
	byte	Sp3;
};

// CFlags byte : click flags

#define ISB_LMB			1		// left click
#define ISB_RMB			2		// right click
#define ISB_CTRL		4		// ctrl + click
#define ISB_SHIFT		8		// shift + click

// If the TypeIn byte is set in IS_BTN the user can type text into the button
// In that case no IS_BTC is sent - an IS_BTT is sent when the user presses ENTER

struct IS_BTT // BuTton Type - sent back when user types into a text entry button
{
	byte	Size;		// 104
	byte	Type;		// ISP_BTT
	byte	ReqI;		// ReqI as received in the IS_BTN
	byte	UCID;		// connection that typed into the button (zero if local)

	byte	ClickID;	// button identifier originally sent in IS_BTN
	byte	Inst;		// used internally by InSim
	byte	TypeIn;		// from original button specification
	byte	Sp3;

	char	Text[96];	// typed text, zero to TypeIn specified in IS_BTN
};


// OutSim - MOTION SIMULATOR SUPPORT
// ======

// The user's car in multiplayer or the viewed car in single player or
// single player replay can output information to a motion system while
// viewed from an internal view.

// This can be controlled by 5 lines in the cfg.txt file :

// OutSim Mode 0        :0-off 1-driving 2-driving+replay
// OutSim Delay 1       :minimum delay between packets (100ths of a sec)
// OutSim IP 0.0.0.0    :IP address to send the UDP packet
// OutSim Port 0        :IP port
// OutSim ID 0          :if not zero, adds an identifier to the packet

// Each update sends the following UDP packet :

struct OutSimPack
{
	unsigned	Time;		// time in milliseconds (to check order)

	Vector		AngVel;		// 3 floats, angular velocity vector
	float		Heading;	// anticlockwise from above (Z)
	float		Pitch;		// anticlockwise from right (X)
	float		Roll;		// anticlockwise from front (Y)
	Vector		Accel;		// 3 floats X, Y, Z
	Vector		Vel;		// 3 floats X, Y, Z
	Vec			Pos;		// 3 ints   X, Y, Z (1m = 65536)

	int			ID;			// optional - only if OutSim ID is specified
};

// NOTE 1) X and Y axes are on the ground, Z is up.

// NOTE 2) Motion simulators can be dangerous.  The Live for Speed developers do
// not support any motion systems in particular and cannot accept responsibility
// for injuries or deaths connected with the use of such machinery.


// OutGauge - EXTERNAL DASHBOARD SUPPORT
// ========

// The user's car in multiplayer or the viewed car in single player or
// single player replay can output information to a dashboard system
// while viewed from an internal view.

// This can be controlled by 5 lines in the cfg.txt file :

// OutGauge Mode 0        :0-off 1-driving 2-driving+replay
// OutGauge Delay 1       :minimum delay between packets (100ths of a sec)
// OutGauge IP 0.0.0.0    :IP address to send the UDP packet
// OutGauge Port 0        :IP port
// OutGauge ID 0          :if not zero, adds an identifier to the packet

// Each update sends the following UDP packet :

struct OutGaugePack
{
	unsigned	Time;			// time in milliseconds (to check order)

	char		Car[4];			// Car name
	word		Flags;			// Info (see OG_x below)
	byte		Gear;			// Reverse:0, Neutral:1, First:2...
	byte		PLID;			// Unique ID of viewed player (0 = none)
	float		Speed;			// M/S
	float		RPM;			// RPM
	float		Turbo;			// BAR
	float		EngTemp;		// C
	float		Fuel;			// 0 to 1
	float		OilPressure;	// BAR
	float		OilTemp;		// C
	unsigned	DashLights;		// Dash lights available (see DL_x below)
	unsigned	ShowLights;		// Dash lights currently switched on
	float		Throttle;		// 0 to 1
	float		Brake;			// 0 to 1
	float		Clutch;			// 0 to 1
	char		Display1[16];	// Usually Fuel
	char		Display2[16];	// Usually Settings

	int			ID;				// optional - only if OutGauge ID is specified
};

// OG_x - bits for OutGaugePack Flags

#define OG_SHIFT		1		// key
#define OG_CTRL			2		// key

#define OG_TURBO		8192	// show turbo gauge
#define OG_KM			16384	// if not set - user prefers MILES
#define OG_BAR			32768	// if not set - user prefers PSI

// DL_x - bits for OutGaugePack DashLights and ShowLights

enum
{
	DL_SHIFT,			// bit 0	- shift light
	DL_FULLBEAM,		// bit 1	- full beam
	DL_HANDBRAKE,		// bit 2	- handbrake
	DL_PITSPEED,		// bit 3	- pit speed limiter
	DL_TC,				// bit 4	- TC active or switched off
	DL_SIGNAL_L,		// bit 5	- left turn signal
	DL_SIGNAL_R,		// bit 6	- right turn signal
	DL_SIGNAL_ANY,		// bit 7	- shared turn signal
	DL_OILWARN,			// bit 8	- oil pressure warning
	DL_BATTERY,			// bit 9	- battery warning
	DL_ABS,				// bit 10	- ABS active or switched off
	DL_SPARE,			// bit 11
	DL_NUM
};

//////
#endif