Hi, as the title says, is it possible to modify the game.exe and add more GM commands or commands for players to use just like /wings on and /wings off.

yeah. pass the chat text to a function and create an argument vector. then, use the size() method to get the argument count. figure out how to check authorization client-side and server-side. i would check both and dc them if the server-side check fails.

 

i'm sure this could be better, but it's a simple enough example to get anyone started. the game.exe version is 0x16021200. if it's just an on/off command you can evaluate the whole string if you want.

 

#include <sstream>
#include <string>
#include <vector>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#include <include/main.h>
#include <include/util.h>
using namespace shaiya;

int command_handler(char* text)
{
   std::istringstream iss(text);
   std::vector<std::string> argv;

   for (std::string str; std::getline(iss, str, ' '); )
       argv.push_back(str);

   if (argv.empty())
       return 0;

   auto argc = argv.size();

   if (iss.str() == "/example on")
   {
       // do something
       return 0;
   }

   if (iss.str() == "/example off")
   {
       // do something
       return 0;
   }

   if (argv[0] == "/example")
   {
       if (argc != 2)
       {
           // wrong number of arguments
           return 0;
       }

       auto arg1 = argv[1];

       // do something
       return 0;
   }

   return 1;
}

unsigned u0x4867A6 = 0x4867A6;
unsigned u0x487532 = 0x487532;
void __declspec(naked) naked_0x4867A1()
{
   __asm
   {
       pushad

       push edi // text
       call command_handler
       add esp,0x4
       test eax,eax

       popad

       je _0x487532

       // original
       push 0x13D4
       jmp u0x4867A6

       _0x487532:
       jmp u0x487532
   }
}

void hook::chat()
{
   // command handler
   util::detour((void*)0x4867A1, naked_0x4867A1, 5);
}

does this send a packet to the server as well? I am actually planning to add "/call" similar to EG but in EP4.5 to EP6 clients.

does this send a packet to the server as well? I am actually planning to add "/call" similar to EG but in EP4.5 to EP6 clients.

no. there's a typedef of the packet send function in my repo.