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prepare for multiplayer stuff

This commit is contained in:
ChrisMiuchiz 2018-11-05 21:56:22 -05:00 committed by GitHub
parent fdb8955a43
commit 941278ee99
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 58 additions and 0 deletions
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58
CallbackManager/main.cpp
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@ -276,6 +276,57 @@ _declspec(naked) void DLL_EXPORT ASMAbilitiesCheck(){
asm("jmp [_ASMAbilitiesCheck_JMP_Back]");
}
//Packets
MakeCallback(PacketCallback, int, RegisterPacketCallback, packet_callbacks);
int __stdcall no_shenanigans HandlePacket(unsigned int packet_ID, unsigned int socket_ptr){
int handled = 0;
for (PacketCallback func : packet_callbacks){
unsigned int handled_2 = func(packet_ID, socket_ptr);
if (handled_2 != 0){
handled = handled_2;
}
}
return handled;
}
DWORD HandlePacket_ptr = (DWORD)&HandlePacket;
unsigned int ASMHandlePacket_Invalid_Packet_JMP;
unsigned int ASMHandlePacket_Valid_Packet_JMP;
unsigned int ASMHandlePacket_Already_Handled_JMP;
_declspec(naked) void __declspec(dllexport) ASMHandlePacket(){
asm("pushad");
asm("push [ebp-0x11D8]"); //socket
asm("push [ebp-0x1220]"); //Packet ID
asm("call [_HandlePacket_ptr]");
asm("cmp eax, 0");
asm("je 0f"); //The packet was not handled
asm("popad"); //The packet WAS handled
asm("mov cl, 1");
asm("mov [ebp-0x11D1], cl");
asm("jmp [_ASMHandlePacket_Already_Handled_JMP]");
asm("0:"); //The packet was not handled
asm("popad");
asm("mov eax, [ebp-0x1220]");//original code
asm("cmp eax, 0xF");
asm("ja 1f");
asm("jmp [_ASMHandlePacket_Valid_Packet_JMP]");
asm("1:");
asm("jmp [_ASMHandlePacket_Invalid_Packet_JMP]");
}
void WriteJMP(BYTE* location, BYTE* newFunction){
DWORD dwOldProtection;
VirtualProtect(location, 5, PAGE_EXECUTE_READWRITE, &dwOldProtection);
@ -284,6 +335,7 @@ void WriteJMP(BYTE* location, BYTE* newFunction){
VirtualProtect(location, 5, dwOldProtection, &dwOldProtection);
}
extern "C" DLL_EXPORT BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
base = (UINT_PTR)GetModuleHandle(NULL);
@ -314,6 +366,12 @@ extern "C" DLL_EXPORT BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
ASMAbilitiesCheck_JMP_Back = base + 0x9B63A;
WriteJMP((BYTE*)(base + 0x9B635), (BYTE*)&ASMAbilitiesCheck);
//Handle packet
ASMHandlePacket_Already_Handled_JMP = base + 0x6D0E3;
ASMHandlePacket_Invalid_Packet_JMP = base + 0x6D0DD;
ASMHandlePacket_Valid_Packet_JMP = base + 0x6B8B0;
WriteJMP((BYTE*)(base + 0x6B8A7), (BYTE*)&ASMHandlePacket);
break;
}
return true;