FloodControl.inc

/*
    SA-MP FloodControl Include
    Copyright © 2012 RyDeR`, JernejL
*/

#if !defined MAX_JOIN_LOGS
    #define MAX_JOIN_LOGS (30)
#endif

#if !defined MAX_THRESHOLD
    #define MAX_THRESHOLD (8000) // The amount of time in which all joins are valid and counted
#endif

enum e_JoinLog {
    e_iIP,
    e_iTimeStamp
};

static stock
    g_eaJoinLog[MAX_JOIN_LOGS][e_JoinLog]
;

public OnPlayerConnect(playerid) {
    static
        s_iJoinSeq,
        s_szIP[16]
    ;
    GetPlayerIp(playerid, s_szIP, sizeof(s_szIP));

    g_eaJoinLog[s_iJoinSeq][e_iIP] = s_szIP[0] = IpToInt(s_szIP);
    g_eaJoinLog[s_iJoinSeq][e_iTimeStamp] = GetTickCount();

    s_iJoinSeq = ++s_iJoinSeq % MAX_JOIN_LOGS;

    s_szIP[1] = s_szIP[2] = 0;

    for(new i = 0; i < (MAX_JOIN_LOGS - 1); ++i) {
        if(g_eaJoinLog[i][e_iIP] != s_szIP[0]) {
            continue;
        }
        s_szIP[3] = GetTickCount();

        if(floatround(floatabs(s_szIP[3] - g_eaJoinLog[i][e_iTimeStamp])) < MAX_THRESHOLD) {
            if(floatround(floatabs(s_szIP[3] - g_eaJoinLog[i + 1][e_iTimeStamp])) < MAX_THRESHOLD) {
                s_szIP[2] += floatround(floatabs(g_eaJoinLog[i][e_iTimeStamp] - g_eaJoinLog[i + 1][e_iTimeStamp]));
                s_szIP[1] += 1;
            }
        }
    }
    // Eventually initialize and call if exists
    static
        bool: s_bInit,

        s_iHasOPFC = -1,
        s_iHasOPC = -1
    ;
    if(!s_bInit) {
        s_iHasOPFC = funcidx("OnPlayerFloodControl");
        s_iHasOPC = funcidx("FC_OnPlayerConnect");

        s_bInit = !s_bInit;
    }
    if(s_bInit) {
        if(s_iHasOPFC != -1) {
            CallRemoteFunction("OnPlayerFloodControl", "iii", playerid, s_szIP[1], s_szIP[2]);
        }
        if(s_iHasOPC != -1) {
            return CallLocalFunction("FC_OnPlayerConnect", "i", playerid);
        }
    }
    return 1;
}

#if defined _ALS_OnPlayerConnect
    #undef OnPlayerConnect
#else
    #define _ALS_OnPlayerConnect
#endif

#define OnPlayerConnect FC_OnPlayerConnect

static stock IpToInt(const s_szIP[]) {
    new
        aiBytes[1],
        iPos = 0
    ;
    aiBytes{0} = strval(s_szIP[iPos]);
    while(iPos < 15 && s_szIP[iPos++] != '.') {}
    aiBytes{1} = strval(s_szIP[iPos]);
    while(iPos < 15 && s_szIP[iPos++] != '.') {}
    aiBytes{2} = strval(s_szIP[iPos]);
    while(iPos < 15 && s_szIP[iPos++] != '.') {}
    aiBytes{3} = strval(s_szIP[iPos]);

    return aiBytes[0];
}

forward OnPlayerConnect(playerid);
forward OnPlayerFloodControl(playerid, iCount, iTimeSpan);