ANTI PACKET FLOOD c++ Saldırılar karşı koruma

Scarlet · 27 Mar 2022

Hemen yapınız.....

Arkadaşlar Bazı adamlar yurdışından serveriniz packet saldırısı yani
buffer exploit yapıyorlar. bu yüzden makine ram fazla kulanıyor ve oyun game.core verir.

@Luigina @cBaraN @hikmetaypek @TURKLOKASYON Teşekkür ederiz... ( Yardımcı oldular ).

@Luigina Ayrıyeten teşekkür ederim...

Ekli dosyayı görüntüle 74718

Core bu

Çözüm

c++:

//input.cpp açılır ve aratılır
int CInputHandshake::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)

//input.cpp fonksiyon değiştiriir.

int CInputHandshake::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)
{
    if (bHeader == HEADER_CG_ENTERGAME)
        return 0;

    if (bHeader == HEADER_CG_MARK_LOGIN)
    {
        if (!guild_mark_server)
        {
            // ²÷¾î¹ö·Á! - ¸¶Å© ¼¹ö°¡ ¾Æ´Ñµ¥ ¸¶Å©¸¦ ¿äÃ»ÇÏ·Á°í?
            sys_err("Guild Mark login requested but i'm not a mark server!");
            d->SetPhase(PHASE_CLOSE);
            return 0;
        }

        // ¹«Á¶°Ç ÀÎÁõ --;
        sys_log(0, "MARK_SERVER: Login");
        d->SetPhase(PHASE_LOGIN);
        return 0;
    }
    else if (bHeader == HEADER_CG_STATE_CHECKER)
    {
        if (d->isChannelStatusRequested()) {
            return 0;
        }
        d->SetChannelStatusRequested(true);
        db_clientdesc->DBPacket(HEADER_GD_REQUEST_CHANNELSTATUS, d->GetHandle(), NULL, 0);
    }
    else if (bHeader == HEADER_CG_PONG)
        Pong(d);
    else if (bHeader == HEADER_CG_HANDSHAKE)
        Handshake(d, c_pData);
[HASH=2]#ifdef[/HASH] _IMPROVED_PACKET_ENCRYPTION_
    else if (bHeader == HEADER_CG_KEY_AGREEMENT)
    {
        // Send out the key agreement completion packet first
        // to help client to enter encryption mode
        d->SendKeyAgreementCompleted();
        // Flush socket output before going encrypted
        d->ProcessOutput();

        TPacketKeyAgreement* p = (TPacketKeyAgreement*)c_pData;
        if (!d->IsCipherPrepared())
        {
            sys_err ("Cipher isn't prepared. %s maybe a Hacker.", inet_ntoa(d->GetAddr().sin_addr));
            d->DelayedDisconnect(5);
            return 0;
        }
        if (d->FinishHandshake(p->wAgreedLength, p->data, p->wDataLength)) {
            // Handshaking succeeded
            if (g_bAuthServer) {
                d->SetPhase(PHASE_AUTH);
            }
            else {
                d->SetPhase(PHASE_LOGIN);
            }
        }
        else {
            sys_log(0, "[CInputHandshake] Key agreement failed: al=%u dl=%u",
                p->wAgreedLength, p->wDataLength);
            d->SetPhase(PHASE_CLOSE);
        }
    }
[HASH=3]#endif[/HASH] // _IMPROVED_PACKET_ENCRYPTION_
    else
    {
        sys_err("Handshake phase does not handle packet %d (fd %d)", bHeader, d->GetSocket());
        d->SetPhase(PHASE_CLOSE); // maybe disconnect player from server.
        return -1;
    }

    return 0;
}

c++:

// input_login.cpp açılır ve aratılır...
            sys_err("login phase does not handle this packet! header %d", bHeader);
            //d->SetPhase(PHASE_CLOSE);
            return 0;

// fonksiyon değiştirilir.
            sys_err("login phase does not handle this packet! header %d", bHeader);
            //d->SetPhase(PHASE_CLOSE);
            return -1;

c++:

// input_main.cpp açılır ve aratılır...

int CInputMain::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)

// fonksiyon kontrol ederek ekleyiniz.

int CInputMain::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)
{
    LPCHARACTER ch;
    if (!(ch = d->GetCharacter()))
    {
        sys_err("no character on desc");
        d->SetPhase(PHASE_CLOSE);
        return -1;//FloodFix
    }

    //ExploitFix//
    if (ch && ch->GetDesc()->GetPhase() != PHASE_GAME && ch->GetDesc()->GetPhase() != PHASE_DEAD)
    {
        sys_err("no character in game");
        sys_log(0, "no character in game pid : %u phase : %u header : %u ip address : %s", ch->GetPlayerID(), ch->GetDesc()->GetPhase(), bHeader, ch->GetDesc()->GetHostName());
        d->SetPhase(PHASE_CLOSE);
        return -1;//FloodFix
    }
    //ExploitFix//

    int iExtraLen = 0;

// input_main.cpp açılır ve aratılır...

int CInputDead::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)

// fonksiyon kontrol ederek ekleyiniz.

int CInputDead::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)
{
    LPCHARACTER ch;
    if (!(ch = d->GetCharacter()))
    {
        sys_err("no character on desc");
        return -1;//FloodFix
    }

    if (ch && ch->IsPC())
    {
        if (get_global_time() < ch->analyze_protect)
        {
            ch->analyze_protect_count = (ch->analyze_protect_count + 1);

            if (ch->analyze_protect_count >= 300)
            {
                sys_err("%s bu olu serefsiz packet flood yapiyor. Packet[%u]", ch->GetName(), bHeader);
                ch->analyze_protect_count = 0;
                d->SetPhase(PHASE_CLOSE);
                return -1;//Fix
            }
        }
        else
            ch->analyze_protect_count = 0;

        ch->analyze_protect = (get_global_time() + 1);
    }

    int iExtraLen = 0;

c++:

//input_main.cpp açılır ve aratılır.

int CInputDead::Analyze(LPDESC d, BYTE bHeader, const char * c_pData)

// Fonskiyon içinde bu bulunur

        default:
            return (0);

// Değiştirilir..
        default:
            return -1;//FloodFix

c++:

//char.h açılır aratılır.

int                GetSyncHackCount() { return m_iSyncHackCount; }

// altına eklenir.

    //FloodFix
    public:
        int analyze_protect;
        int analyze_protect_count;
        int analyze_protect_other_count;
    //FloodFix

c++:

//desc.h açılır ve aratılır

        bool            IsPhase(int phase) const    { return m_iPhase == phase ? true : false; }

// Altına eklenir.

        int                GetPhase() const    { return m_iPhase; }