Nex-AC - Anticheat system

Nex Anticheat (Nex-AC) - is a comprehensive protection which combines powerful anticheat and protection against various attacks (flood, DoS).
Anticheat detects popular cheats instantly punishing cheaters.
Anti-DoS combines customizable anti-flood, anti-DoS at network level and a lot of protection tools against hacking, crashers etc.

List of basic anti-cheats:

Anti-AirBreak (onfoot/in vehicle)
Anti-teleport hack (onfoot/into/in/between vehicles)
Anti-teleport pickups
Anti-FlyHack (onfoot/in vehicle)
Anti-SpeedHack (onfoot/in vehicle)
Anti-Health hack (onfoot/in vehicle) and armour hack
Anti-Weapon hack and (add/infinite) ammo hack
Anti-Special actions hack (including jetpack)
Anti-GodMode from bullets (onfoot/in vehicle)
Anti-Invisible hack
Anti-Money hack
Anti-Tuning hack
Anti-lagcomp-spoof
Anti-Parkour mod
Anti-Quick turn
Anti-Rapid fire
Anti-FakeSpawn
Anti-FakeKill
Anti-Pro Aim
Anti-CJ run
Anti-CarShot
Anti-CarJack
Anti-UnFreeze
Anti-AFK Ghost
Anti-Reconnect
Anti-High ping
Anti-Fake NPC
Anti-Dialog hack
Protection from the sandbox
Protection against invalid version
Anti-flood change seat
Flood protection connects to one slot
Anti-Rcon hack (brute/brute-forse)
Anti-flood callback functions (complete list below)
Anti-crashers (complete list below)
Anti-NOP's (complete list below)
Anti-Dos

Additional features:

* Setting anticheat from file

The settings is located in a separate file (scriptfiles\nex-ac_settings.cfg)

* View statistics

Ability to view statistics of the anticheat while the server working since its launch
Displayed automatically when server turn off. Stored in a server log (server_log.txt)

* Logging the most important actions

Optionally you can enable debug-mode for log all actions

* Multilingual

Ability to set any of the available languages.
It also simplifies the translation of anticheat to other languages

List of publics which are protected by anti-flood:

OnDialogResponse
OnEnterExitModShop
OnPlayerClickMap
OnPlayerClickPlayer
OnPlayerClickTextDraw
OnPlayerCommandText
OnPlayerEnterVehicle
OnPlayerExitVehicle
OnPlayerPickUpPickup
OnPlayerRequestClass
OnPlayerSelectedMenuRow
OnPlayerStateChange
OnVehicleMod
OnVehiclePaintjob
OnVehicleRespray
OnVehicleDeath
OnPlayerText
OnPlayerEnterCheckpoint
OnPlayerLeaveCheckpoint
OnPlayerRequestSpawn
OnPlayerExitedMenu
OnPlayerEnterRaceCheckpoint
OnPlayerLeaveRaceCheckpoint
OnPlayerClickPlayerTextDraw
OnVehicleDamageStatusUpdate
OnPlayerSelectObject

Anti-NOP's:

SpawnPlayer
SetPlayerPos
SetVehiclePos
SetPlayerAmmo
SetPlayerHealth
SetPlayerArmour
SetVehicleHealth
GivePlayerWeapon
SetPlayerPosFindZ
SetPlayerInterior
PutPlayerInVehicle
ResetPlayerWeapons
SetPlayerArmedWeapon
SetPlayerSpecialAction
TogglePlayerSpectating
RemovePlayerFromVehicle

Anti-Crashers:

Invalid tuning
Invalid vehicle seat
Illegal characters in the dialogs (deleting)
Invalid attached objects
Weapon Crasher

Functions:

public OnCheatDetected(playerid, ip_address[], type, code)

Called when triggered one of the anti-cheats

playerid - ID of the cheater

ip_address[] - IP-address of the cheater

type - Type of cheating (when 0 it returns the ID, when 1 - IP)

code - Code (ID) of the anti-cheat

EnableAntiCheat(code, enable)

Use to enable/disable one of the anti-cheats

code - ID of the anti-cheat

enable - 1 to enable/0 to disable

EnableAntiCheatForPlayer(playerid, code, enable)

Use to enable/disable one of the anti-cheats for a particular player

playerid - ID of the player who needs to enable/disable the anti-cheat

code - ID of the anti-cheat

enable - 1 to enable/0 to disable

Added in v1.3:

IsAntiCheatEnabled(code)

Use to check whether one of the anti-cheats is enabled/disabled

code - ID of the anti-cheat

Return 1 (true) if enabled or 0 (false) if disabled

IsAntiCheatEnabledForPlayer(playerid, code)

Use to check whether one of the anti-cheats is enabled/disabled for a particular player

playerid - ID of the player to be checked whether the anti-cheat enabled/disabled for him

code - ID of the anti-cheat

Return 1 (true) if enabled or 0 (false) if disabled

Added in v1.8.8:

AntiCheatGetHealth(playerid, &Float:health)

Use to get the amount of a player's health

playerid - The ID of the player

&Float:health - Variable for storage health, passed by reference

AntiCheatGetArmour(playerid, &Float:armour)

Use to get the amount of a player's armour

playerid - The ID of the player

&Float:armour - Variable for storage armour, passed by reference

AntiCheatGetVehicleHealth(vehicleid, &Float:health)

Use to get the amount of a vehicle health

vehicleid - The ID of the vehicle

&Float:health - Variable for storage health, passed by reference

AntiCheatGetWeaponData(playerid, slot, &weapons, &ammo)

Use to get weapons and ammo in a certain slot of a player

playerid - The ID of the player

slot - The slot in which need get the weapons and ammo

&weapons - Variable for storage weapon ID, passed by reference

&ammo - Variable for storage amount of ammo, passed by reference

AntiCheatGetSpawnWeapon(playerid, &weapon1, &weapon1_ammo, &weapon2, &weapon2_ammo, &weapon3, &weapon3_ammo)

Use to get spawn weapons and ammo of a player

playerid - The ID of the player

&weapon1 - Variable for storage the weapon 1, passed by reference

&weapon1_ammo - The variable for storage the amount of ammo for the weapon 1, passed by reference

&weapon2 - Variable for storage the weapon 2, passed by reference

&weapon2_ammo - The variable for storage the amount of ammo for the weapon 2, passed by reference

&weapon3 - Variable for storage the weapon 3, passed by reference

&weapon3_ammo - The variable for storage the amount of ammo for the weapon 3, passed by reference

AntiCheatGetPos(playerid, &Float:x, &Float:y, &Float:z)

Use to get a player's position

playerid - The ID of the player

&Float:x - The variable for storage the x coordinate, passed by reference

&Float:y - The variable for storage the y coordinate, passed by reference

&Float:z - The variable for storage the z coordinate, passed by reference

AntiCheatGetVehicleVelocity(vehicleid, &Float:x, &Float:y, &Float:z)

Use to get a vehicle speed

vehicleid - The ID of the vehicle

&Float:x - The variable for storage the x speed, passed by reference

&Float:y - The variable for storage the y speed, passed by reference

&Float:z - The variable for storage the z speed, passed by reference

AntiCheatGetSpeed(playerid)

Use to get a player's speed

playerid - The ID of the player

Returns a player's speed or 0 if the player is not connected

AntiCheatGetAnimationIndex(playerid)

Use to get the index (ID) of a player's current animation

playerid - The ID of the player

Returns the ID of the animation or 0 if the player is not connected

AntiCheatGetDialog(playerid)

Use to get the ID of the opened dialog of a player

playerid - The ID of the player

Returns the ID of the dialog or -1 if the player is not connected

AntiCheatGetMoney(playerid)

Use to get the amount of a player's money

playerid - The ID of the player

Returns the amount of money or 0 if the player is not connected

AntiCheatGetEnterVehicle(playerid)

Use to get the ID of the vehicle which a player try to enter

playerid - The ID of the player

Returns the ID of the vehicle or 0 if the player is not connected

AntiCheatGetVehicleID(playerid)

Use to get the ID of the vehicle in which a player is in

playerid - The ID of the player

Returns the ID of the vehicle or 0 if the player is not connected

AntiCheatGetWeapon(playerid)

Use to get a player's current weapon ID

playerid - The ID of the player

Returns the ID of weapon or -1 if the player is not connected

AntiCheatGetVehicleSeat(playerid)

Use to get the seat in the vehicle on which the player is in

playerid - The ID of the player

Returns a number of the seat or -1 if the player is not connected

AntiCheatGetSpecialAction(playerid)

Use to get the ID of the special action of a player

playerid - The ID of the player

Returns the ID of the special action or 0 if the player is not connected

AntiCheatGetLastSpecialAction(playerid)

Use to get the ID of the previous special action of a player

playerid - The ID of the player

Returns the ID of the previous special action or 0 if the player is not connected

AntiCheatGetLastShotWeapon(playerid)

Use to get the ID of the last weapon from which a player shot

playerid - The ID of the player

Returns the ID of the last weapon or -1 if the player is not connected

AntiCheatGetLastPickup(playerid)

Use to get the ID of the last pickup which a player picked

playerid - The ID of the player

Returns the ID of the last picked up pickup or -1 if the player is not connected

AntiCheatGetLastUpdateTime(playerid)

Use to get a player's last update timestamp

playerid - The ID of the player

Returns a timestamp of the last update or 0 if the player is not connected

AntiCheatGetLastReloadTime(playerid)

Use to get a player's last (weapon) reload timestamp

playerid - The ID of the player

Returns a timestamp of the last reload or 0 if the player is not connected

AntiCheatGetLastEnteredVehTime(playerid)

Use to get a player's last entering vehicle attempt timestamp

playerid - The ID of the player

Returns a timestamp of the last entering attempt or 0 if the player is not connected

AntiCheatGetLastShotTime(playerid)

Use to get a player's last shot timestamp

playerid - The ID of the player

Returns a timestamp of the last shot or 0 if the player is not connected

AntiCheatGetLastSpawnTime(playerid)

Use to get a player's last spawn timestamp

playerid - The ID of the player

Returns a timestamp of the last spawn or 0 if the player is not connected

AntiCheatIntEnterExitsIsEnabled(playerid)

Use to check whether enter/exit markers in interiors are enabled/disabled for a player

playerid - The ID of the player

Returns 1 (true) if enabled or 0 (false) if disabled

AntiCheatStuntBonusIsEnabled(playerid)

Use to check whether stunt bonus is enabled/disabled for a player

playerid - The ID of the player

Returns 1 (true) if enabled or 0 (false) if disabled

AntiCheatIsInModShop(playerid)

Use to check whether a player is in ModShop or not

playerid - The ID of the player

Returns 1 (true) if it is or 0 (false) if it is not

AntiCheatIsFrozen(playerid)

Use to check whether a player is frozen or not

playerid - The ID of the player

Returns 1 (true) if frozen or 0 (false) if not frozen

AntiCheatIsDead(playerid)

Use to check whether a player is dead or not

playerid - The ID of the player

Returns 1 (true) if dead or 0 (false) if not dead

AntiCheatIsConnected(playerid)

Use to check whether a player is on a server or not

playerid - The ID of the player

Returns 1 (true) if it is or 0 (false) if it is not

Added in v1.9.37:

public OnCheatWarning(playerid, ip_address[], type, code, code2, count)

Called when triggered any warnings of one of the anti-cheats

playerid - ID of the suspected cheater

ip_address[] - IP-address of the suspected cheater

type - Type of cheating (when 0 it returns the ID, when 1 - IP)

code - Code (ID) of the anti-cheat

code2 - Sub-code (ID) of the anti-cheat check

count - Count of warnings triggered on suspected cheater

public OnFloodWarning(playerid, publicid, count)

Called when triggered any anti-flood warnings on one of the protected publics

playerid - ID of the suspected flooder

publicid - ID of the public that was called too quickly

count - Count of warnings triggered on suspected flooder

public OnNOPWarning(playerid, nopid, count)

Called when triggered any NOP warnings on one of the protected functions

playerid - ID of the suspected cheater

nopid - ID of the NOP check

count - Count of warnings triggered on suspected cheater

AntiCheatKickWithDesync(playerid, code)

Use to kick with desync a particular player by the anticheat

playerid - ID of the player who will be kicked with desync for the delay time

code - ID of the anti-cheat (with some codes the player's vehicle will be resynced after his disconnection)

AntiCheatIsKickedWithDecync(playerid)

Use to check whether a player is kicked or not

playerid - The ID of the player

Returns 1 for kick onfoot, 2 for kick in a vehicle (driver), 3 if player is already disconnected or 0 if he isn't kicked

Added in v1.9.40:

AntiCheatGetSpawnPos(playerid, &Float:x, &Float:y, &Float:z)

Use to get a player's spawn position

playerid - The ID of the player

&Float:x - The variable for storage the x coordinate, passed by reference

&Float:y - The variable for storage the y coordinate, passed by reference

&Float:z - The variable for storage the z coordinate, passed by reference

Multilingual:

The script can be configured at any of the available languages. To do it, just download the desired localization, save it in a directory with the main include (nex_ac.inc) and recompile your script.

It is also recommended to check on use any other anti-cheats in order to avoid conflicts with them.

Installation:

Download version of the anticheat which compatible with the version of your server
Download the language file (.lang) in your preferred language
Copy both files to a folder "/pawno/include" which is located in the folder with the server
In gamemode and all filterscripts after #include "a_samp" write the following: #include "nex-ac"
Warning! If you use Streamer Plugin by Incognito, Timerfix plugin by Dan, foreach, sscanf, Pawn.RakNet or y_hooks, include it before nex-ac!
Also keep in mind that filterscript must have "#define FILTERSCRIPT" before including anticheat
Compile the modified scripts

Do you get an error when you compiling this anticheat with YSI? Check out some tips

Thanks:

Magic_York, Roberto_York, TheHero, Nike_33, Vitalik_Gonsor, Mix_Rargard, Unisheld, f0Re3t - testing
ZiGGi, Urukhay, Yashas, theYiin, RaefaldhiAmartya, PatchwerkQWER, kvann, rt-2 - advices on the code
Carper - German translation
Jstylezzz - Dutch translation
J4Rr3x, Sasino97 - Italian translation
Alex Westbrook, JustBored - Spanish translation
lashona, ArthourP, DAKYSKYE - Georgian translation
wampiros6 - Polish translation
DeitY, Dragony92 - Serbian translation
NicK_ - PT/BR translation
KyleSmith - Improved English translation
M4D - Persian (Farsi) Translation
Valera_Kovshikov - Ukrainian translation
RaefaldhiAmartya - Indonesian translation
vannesenn - Croatian translation
j3rry, vic1997 - French translation
zaibaslr2 - Lithuanian translation
UnforgiveNNN - Romanian translation
Pedro. - Hungarian translation
Ben_Lovejoy - Finnish translation
Rengar - Latvian translation
bgedition - Bulgarian translation
Jensenn - Turkish translation
Sanady - Slovak translation
Grig - Armenian translation
SooBad - Czech translation
OldPawn - Estonian translation
Negativ_Tm - Turkmen translation
Trung.Tin - Vietnamese translation
willbedie - Albanian translation
aktah - Thai translation

This script also contains materials of third-party projects with open source.

P.s. I develop this anticheat about a year and spent on it a lot of effort and time. I hope very much that it will be useful to you.

Enjoy!