MatchServer: Calling ZGetObjectA

Hey guys, I'm coding at matchserver, and I was trying to call MMatchServer::GetObjectA in order to get the User's UGradeID that's stored at GetOBjectA + 0x44. Everything I got so far was alot of crashes, so I'm here to ask you guys a little help, take a look at my code:

Code:

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public: class MMatchObject * __thiscall MMatchServer::GetObjectA(struct MUID const &)

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Code:

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int GetGrade(MUID id)
{
        DWORD result;
        __asm
        {
                mov eax, MMATCHSERVER_GETINSTANCE // Class instance
                call eax
                mov ecx, eax

                push id

                mov eax, ZGetObjectA // Calling the function
                call eax
                mov result,eax
        }
        result = result + 0x44; // That's the pointer to User's UGradeID (I guess atleast xP)
        return (int)result;
}

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Thanks.

I've tried doing this before too.

I guess it's wrong, but it was worth a try.

Code:

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int GetUGradeID(MUID ObjectUID)
{
        int UGradeID = 0;

        __asm
        {
                mov eax, MMATCHSERVER_GETINSTANCE
                call eax
                mov ecx, eax

                push ObjectUID
                add eax, 50
                mov eax, MMATCHSERVER_GETOBJECTA
                call eax
                mov eax, UGradeID
        }

        return UGradeID;
}

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Code:

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PUSH 0; lowid
PUSH highid; unsigned long

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MUID should be passed as reference.

GetGrade(struct MUID &uidPlayer)

Then push uidPlayer.

Thanks for the help.

Thanks Wiz, it doesn't crash anymore at least, the return seems a little bugged though ([12/29/09 15:04:30] Grade: 108148500), but that's fine, I'll find a way to solve it. Thanks again.

@Linear, your code doesn't work, but thanks anyway =D

Getting weird values.

Yeah, me too.

Try this.

Code:

---

int GetUGradeID(const MUID& ObjectUID)
{
    int UGradeID = 0;

    __asm
    {
        mov eax, MMATCHSERVER_GETINSTANCE
        call eax
        mov ecx, eax

        push ObjectUID
        mov eax, MMATCHSERVER_GETOBJECTA
        call eax
        mov UGradeID, dword ptr ds:[eax+0x44]
    }

    return UGradeID;
}

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Quote:

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Originally Posted by Lambda

Try this.

Code:

---

int GetUGradeID(const MUID& ObjectUID)
{
    int UGradeID = 0;

    __asm
    {
        mov eax, MMATCHSERVER_GETINSTANCE
        call eax
        mov ecx, eax

        push ObjectUID
        mov eax, MMATCHSERVER_GETOBJECTA
        call eax
        mov UGradeID, dword ptr ds:[eax+0x44]
    }

    return UGradeID;
}

---

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Thanks, but that's giving me the following error:

Code:

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error C2415: improper operand type

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at

Code:

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mov UGradeID, dword ptr ds:[eax+0x44]

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EDIT: BTW, i've tried that:

Code:

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                mov eax, MMATCHSERVER_GETINSTANCE // Class instance
                call eax
                mov ecx, eax

                push uidObject
                mov eax, ZGetObjectA // Calling the function
                call eax
                mov eax, dword ptr ds:[eax+0x44]
                mov UGradeID, eax

---

It returns the UGradeID well, but crashes after the command is completed.

Any tips?

Quote:

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Originally Posted by cerealnp

Thanks, but that's giving me the following error:

Code:

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error C2415: improper operand type

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at

Code:

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mov UGradeID, dword ptr ds:[eax+0x44]

---

EDIT: BTW, i've tried that:

Code:

---

                mov eax, MMATCHSERVER_GETINSTANCE // Class instance
                call eax
                mov ecx, eax

        push uidObject
        mov eax, ZGetObjectA // Calling the function
        call eax
        mov eax, dword ptr ds:[eax+0x44]
        mov UGradeID, eax

---

It returns the UGradeID well, but crashes after the command is completed.

Any tips?

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Save your registers. (PUSHAD, POPAD)

Thanks a lot!