AntyCheat System v2.4 FIX (SAMP)

#define FILTERSCRIPT

#include <a_samp>
#include <pawn.RakNet>

// -
#define VERS "2.4"

#define C_GREEN 0x20DD6AFF
#define C_ERROR 0xA01616FF

#define MOBILE_CLIENT "ED40ED0E8089CC44C08EE9580F4C8C44EE8EE990"

// -
native SendClientCheck(playerid, type, arg, offsetMem, size);
native gpci(playerid, serial[], maxlen);

// -
enum PR_JoinData
{
    PR_iVersion,
    PR_byteMod,
    PR_byteNicknameLen,
    PR_NickName[24],
    PR_uiClientChallengeResponse,
    PR_byteAuthKeyLen,
    PR_auth_key[50],
    PR_iClientVerLen,
    PR_ClientVersion[30]
};

enum AC_PlayerData {
    bool:mobilePlayer,
    bool:pSuspicious,
    bool:pResponded,
    pCheat,
    pCheckSum
};

new AC_Player[MAX_PLAYERS][AC_PlayerData];

// ------------
new rMemAddr[10];
new opcodes[10] = {
    0x06865E,
    0xA88774,
    0xDB6746,
    0xFDB957,
    0x52D558,
    0xE4FC58,
    0x1BA246,
    0xB0C56F,
    0xF9855E,
    0xF51D54
};
new expectedValues[10] = {192, 72, 192, 68, 196, 64, 8, 200, 200, 128};

// -- Callbacks --
public OnFilterScriptInit()
{
    print("--------------------------------------------------");
    print("\t");
    print("\t");
    print("  AntyCheat "VERS" by Pevenaider loaded           ");
    print("\t");
    print("\t");
    print("--------------------------------------------------");
    return 1;
}

public OnPlayerConnect(playerid)
{
    new version[24], pAuth[43];

    // --
    AC_Player[playerid][pCheat] = -1;
    AC_Player[playerid][mobilePlayer] = false;
    AC_Player[playerid][pSuspicious] = false;
    AC_Player[playerid][pResponded] = false;

    // -- Client version | GPCI --
    GetPlayerVersion(playerid, version, sizeof(version));
    gpci(playerid, pAuth, sizeof(pAuth));

    if ( !strcmp ( MOBILE_CLIENT, pAuth, true ) )
    {
        if ( AC_Player[playerid][pCheckSum] == 0xBEEF )
        {
            AC_Player[playerid][mobilePlayer] = true;
            AC_Player[playerid][pResponded] = true;
        } else {
            SendClientMessage(playerid, C_ERROR, "[ERROR] There was a problem with the mobile version authentication, Your IP is temporarily blocked!");
            SetTimerEx("kickPlayer", 1500, false, "ii", playerid, 1);
        }
    }

    if ( strcmp ( version, "0.3.7" ) == 0 && AC_Player[playerid][mobilePlayer] == false )
    {
        SendClientMessage(playerid, C_ERROR, "[ERROR] The server requires a client version newer than 0.3.7 R1!");
        SetTimerEx("kickPlayer", 1500, false, "ii", playerid, 0);
    }

    // --
    SendClientCheck(playerid, 0x47, 0, 0, 0x4);
    SendClientCheck(playerid, 0x48, 0, 0, 0x4);
    // --

    for (new i = 0; i < 10; i++) rMemAddr[i] = rrAddress(opcodes[i]), SendClientCheck(playerid, 0x5, rMemAddr[i], 0x0, 0x4);

    // -- Check RPC --
    CallLocalFunction("OnClientCheckResponse", "iiii", playerid, 0x47, 0xCECECE, 256);
    CallLocalFunction("OnClientCheckResponse", "iiii", playerid, 0x48, 0xDEDEDE, 256);
    // -

    AC_Player[playerid][pCheckSum] = -1;
    SetTimerEx("autoSobCheck", 2900, false, "i", playerid);
    return 1;
}

forward OnClientCheckResponse(playerid, actionid, memaddr, retndata);
public OnClientCheckResponse(playerid, actionid, memaddr, retndata)
{
    switch(actionid)
    {
        case 0x5:
        {
            if ( AC_Player[playerid][mobilePlayer] == false ) { AC_Player[playerid][pResponded] = true; }

            for (new i = 0; i < 10; i++)
            {
                if ( memaddr == rMemAddr[i] )
                {
                    if ( retndata != expectedValues[i] ) AC_Player[playerid][pCheat] = i + 1;
                    break;
                }
            }
        }

        case 0x47:
        {
            if ( AC_Player[playerid][mobilePlayer] == false && memaddr == 0x0 && retndata != 256 )
            {
                AC_Player[playerid][pSuspicious] = false;
            }

            if ( AC_Player[playerid][mobilePlayer] == false && memaddr == 0xCECECE && retndata == 256 )
            {
                AC_Player[playerid][pSuspicious] = true;
                // -
                SendClientCheck(playerid, 0x47, 0, 0, 0x4);
            }
        }

        case 0x48:
        {
            if ( AC_Player[playerid][mobilePlayer] == false && memaddr != 0xDEDEDE && retndata == 0 )
            {
                AC_Player[playerid][pSuspicious] = false;
            }

            if ( AC_Player[playerid][mobilePlayer] == false && memaddr == 0xDEDEDE && retndata == 256 )
            {
                AC_Player[playerid][pSuspicious] = true;
                // -
                SendClientCheck(playerid, 0x48, 0, 0, 0x4);
            }
        }
    }
    return 1;
}

forward autoSobCheck(playerid);
public autoSobCheck(playerid)
{
    if ( AC_Player[playerid][mobilePlayer] == true )
    {
        SendClientMessage(playerid, C_GREEN, "You’re currently playing the mobile version of SA-MP.");
    }

    // --
    if ( AC_Player[playerid][pSuspicious] == true )
    {
        SendClientMessage(playerid, C_ERROR, "[ERROR] System has detected that you are probably using some mods. If you think this is a mistake, please contact the Admin.");
        SetTimerEx("kickPlayer", 1500, false, "ii", playerid, 0);
    }
    if ( AC_Player[playerid][pResponded] == false )
    {
        SendClientMessage(playerid, C_ERROR, "[ERROR] System has detected that you are probably using some mods. If you think this is a mistake, please contact the Admin.");
        SetTimerEx("kickPlayer", 1500, false, "ii", playerid, 0);
    }
    // --

    switch ( AC_Player[playerid][pCheat] )
    {
        case 1:cheatDetected(playerid, "S0beit");
        case 2..4:cheatDetected(playerid, "CLEO");
        case 5..6:cheatDetected(playerid, "CLEO / MoonLoader");
        case 7:cheatDetected(playerid, "CLEO");
        case 8:cheatDetected(playerid, "SilentPatch");
        case 9:cheatDetected(playerid, "SampFuncs");
        case 10:cheatDetected(playerid, "S0beit");
    }
    return 1;
}

forward OnIncomingRPC(playerid, rpcid, BitStream:bs);
public OnIncomingRPC(playerid, rpcid, BitStream:bs)
{
    switch ( rpcid )
    {
        case 25:
        {
            new data[PR_JoinData];

            BS_ReadValue( bs, PR_INT32, data[PR_iVersion], PR_UINT8, data[PR_byteMod], PR_UINT8, data[PR_byteNicknameLen], PR_STRING, data[PR_NickName], data[PR_byteNicknameLen],
                PR_UINT32, data[PR_uiClientChallengeResponse],
                PR_UINT8, data[PR_byteAuthKeyLen],
                PR_STRING, data[PR_auth_key], data[PR_byteAuthKeyLen],
                PR_UINT8, data[PR_iClientVerLen]
            );

            BS_ReadValue( bs, PR_STRING, data[PR_ClientVersion], (data[PR_iClientVerLen] >= 30 ? 30:data[PR_iClientVerLen]) );
            // -
            BS_ReadUint16(bs, AC_Player[playerid][pCheckSum]);
        }
    }
    return 1;
}

forward kickPlayer(playerid, action);
public kickPlayer(playerid, action)
{
    switch ( action )
    {
        case 0:Kick(playerid);
        case 1:
        {
            new pIP[16+1];

            GetPlayerIp(playerid, pIP, sizeof(pIP));
            BlockIpAddress(pIP, 60 * 3000);
        }
    }
}

// --
static cheatDetected(playerid, const cName[])
{
    new string[128];

    for(new i = 0; i < 7; i++) SendClientMessage(playerid, -1, " ");
    SendClientMessage(playerid, C_GREEN, "--------------------------------------------");

    format(string, 128, "[ERROR] System has detected that you are using %s. Remove it and return to the server!", cName);
    SendClientMessage(playerid, C_ERROR, string);

    SetTimerEx("kickPlayer", 1500, false, "ii", playerid, 0);
    return 1;
}

static rrAddress(input)
{
    new result;

    #emit LOAD.S.pri input
    #emit CONST.alt 0xFF
    #emit AND
    #emit CONST.alt 16
    #emit SHL
    #emit STOR.S.pri result

    #emit LOAD.S.pri input
    #emit CONST.alt 0xFF00
    #emit AND
    #emit LOAD.S.alt result
    #emit ADD
    #emit STOR.S.pri result

    #emit LOAD.S.pri input
    #emit CONST.alt 0xFF0000
    #emit AND
    #emit CONST.alt 16
    #emit SHR
    #emit LOAD.S.alt result
    #emit ADD
    #emit STOR.S.pri result

    return result;
}