Please explain what this code does

[Hawlong]

Hello all ,
All i know , This is a Buffer for thiscall Function

struct sAABuffer_Helper
	{
		DWORD SecondDword;
		BYTE Filler[0x200];
	};
 
	struct sAABuffer
	{ 
		DWORD FirstDword;
		BYTE Filler[0x400];	// NOT ACTUALLY A FILLER, ITS THE SERIALIZED MSG BUFFER.
		sAABuffer_Helper* pBuffer;
 
		sAABuffer(DWORD First, DWORD Second)
		{
			FirstDword = First;
			pBuffer = new sAABuffer_Helper{};
			memset(Filler, 0, 0x400);
			
			pBuffer->SecondDword = Second;
			memset(pBuffer->Filler, 0, 0x200);
		}
 
		~sAABuffer()
		{
			delete pBuffer;
		}
 
	};



LPVOID m_lpAAPacketFirstDword = 0xF6FEE0;
LPVOID m_lpAAPacketSecondDword = 0xF6FEF8;
sAABuffer* m_AABuffer ;
m_AABuffer = new sAABuffer((DWORD)m_lpAAPacketFirstDword, (DWORD)m_lpAAPacketSecondDword);

function and some explanation ,

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55 push ebp

8BEC mov ebp,esp 53 push ebx 8B5D 0C mov ebx,dword ptr ss:[ebp+C] 56 push esi 57 push edi 8BF1 mov esi,ecx -------------> ecx = m_lpAAPacketFirstDword 85DB test ebx,ebx 0F84 BA000000 je co_game.98E82E 8B7D 10 mov edi,dword ptr ss:[ebp+10] 85FF test edi,edi 0F84 AF000000 je co_game.98E82E E8 9870F4FF call <JMP.&timeGetTime> 8B8E 04040000 mov ecx,dword ptr ds:[esi+404] 8349 20 01 or dword ptr ds:[ecx+20],1 8941 28 mov dword ptr ds:[ecx+28],eax 8B86 04040000 mov eax,dword ptr ds:[esi+404] 8348 20 08 or dword ptr ds:[eax+20],8 0FB74D 14 movzx ecx,word ptr ss:[ebp+14] 8958 34 mov dword ptr ds:[eax+34],ebx 8B86 04040000 mov eax,dword ptr ds:[esi+404] 8348 20 10 or dword ptr ds:[eax+20],10 8978 38 mov dword ptr ds:[eax+38],edi 8B86 04040000 mov eax,dword ptr ds:[esi+404] 8348 20 40 or dword ptr ds:[eax+20],40 8948 40 mov dword ptr ds:[eax+40],ecx 8B86 04040000 mov eax,dword ptr ds:[esi+404] 8148 20 80000000 or dword ptr ds:[eax+20],80 0FB74D 18 movzx ecx,word ptr ss:[ebp+18] 8948 44 mov dword ptr ds:[eax+44],ecx 8B86 04040000 mov eax,dword ptr ds:[esi+404] 8148 20 00100000 or dword ptr ds:[eax+20],1000 0FB74D 08 movzx ecx,word ptr ss:[ebp+8] 8948 58 mov dword ptr ds:[eax+58],ecx 8B86 04040000 mov eax,dword ptr ds:[esi+404] 8B4D 1C mov ecx,dword ptr ss:[ebp+1C] 8148 20 00400000 or dword ptr ds:[eax+20],4000 8948 60 mov dword ptr ds:[eax+60],ecx 8B8E 04040000 mov ecx,dword ptr ds:[esi+404] -------------> ecx = m_lpAAPacketSecondDword 68 FC030000 push 3FC 8D46 08 lea eax,dword ptr ds:[esi+8] 50 push eax E8 05E13B00 call <co_game.sub_D4C910> <----------- thiscall function 84C0 test al,al 74 1F je co_game.98E82E 8B8E 04040000 mov ecx,dword ptr ds:[esi+404] B8 57080000 mov eax,857 66:8946 06 mov word ptr ds:[esi+6],ax 8B01 mov eax,dword ptr ds:[ecx] FF50 20 call dword ptr ds:[eax+20] 83C0 04 add eax,4 66:8946 04 mov word ptr ds:[esi+4],ax B0 01 mov al,1 EB 02 jmp co_game.98E830 32C0 xor al,al 5F pop edi 5E pop esi 5B pop ebx 5D pop ebp C2 1800 ret 18

ida pro

char __thiscall sub_98E761(
        int this,
        unsigned __int16 a2,
        int a3,
        int a4,
        unsigned __int16 a5,
        unsigned __int16 a6,
        int a7)
{
  DWORD v8; // eax
  int v9; // ecx
  int v10; // eax
  int v11; // eax
  int v12; // eax
  int v13; // eax
  int v14; // eax
  int v15; // eax
  int v16; // ecx
 
  if ( !a3 )
    return 0;
  if ( !a4 )
    return 0;
  v8 = sub_8D581C();
  v9 = *(_DWORD *)(this + 1028);
  *(_DWORD *)(v9 + 32) |= 1u;
  *(_DWORD *)(v9 + 40) = v8;
  v10 = *(_DWORD *)(this + 1028);
  *(_DWORD *)(v10 + 32) |= 8u;
  *(_DWORD *)(v10 + 52) = a3;
  v11 = *(_DWORD *)(this + 1028);
  *(_DWORD *)(v11 + 32) |= 0x10u;
  *(_DWORD *)(v11 + 56) = a4;
  v12 = *(_DWORD *)(this + 1028);
  *(_DWORD *)(v12 + 32) |= 0x40u;
  *(_DWORD *)(v12 + 64) = a5;
  v13 = *(_DWORD *)(this + 1028);
  *(_DWORD *)(v13 + 32) |= 0x80u;
  *(_DWORD *)(v13 + 68) = a6;
  v14 = *(_DWORD *)(this + 1028);
  *(_DWORD *)(v14 + 32) |= 0x1000u;
  *(_DWORD *)(v14 + 88) = a2;
  v15 = *(_DWORD *)(this + 1028);
  *(_DWORD *)(v15 + 32) |= 0x4000u;
  *(_DWORD *)(v15 + 96) = a7;
  if ( !(unsigned __int8)sub_D4C910(this + 8, 1020) )
    return 0;
  v16 = *(_DWORD *)(this + 1028);
  *(_WORD *)(this + 6) = 2135;
  *(_WORD *)(this + 4) = (*(int (__thiscall **)(int))(*(_DWORD *)v16 + 32))(v16) + 4;
  return 1;
}