Source engine interfaces using the libraries linked list instead of bruteforcing

wewe.cpp

// modified from original shit Altimor posted
class Dynamic_interface
{
  struct Interface_linked_list {
    void* (*func)();
    const char* name;
    Interface_linked_list* next;
  };

  Interface_linked_list* interface_list;

 public:
  Dynamic_interface(const std::string& module)
  {
    void* create_interface =
        dlsym(dlopen(module.c_str(), RTLD_NOW), "CreateInterface");

    uintptr_t jmp_instr = (uintptr_t)(create_interface) + 4;
    // READING IT AS A INTPTR_T INSTEAD OF SIZE_T IS A MUST!
    // RELATIVE JUMPS CAN BE NEGATIVE TOO!
    uintptr_t jmp_target = jmp_instr + *(intptr_t*)(jmp_instr + 1) + 5;
    interface_list = **(Interface_linked_list***)(jmp_target + 11);
    printf("%s interface ptr: 0x%X\n", module.c_str(),
           (uintptr_t)interface_list);
  }

  template <typename T = void>
  T* get(const std::string& intf_name)
  {
    for (auto* list_ptr = interface_list; list_ptr; list_ptr = list_ptr->next) {
      if (std::string(list_ptr->name).substr(0, intf_name.length()) ==
          intf_name) {
        try {
          int version = std::stoi(list_ptr->name + intf_name.length());
          auto* result = list_ptr->func();
          printf("%s v%.3d: 0x%X\n", intf_name.c_str(), version,
                 (uintptr_t)result);
          return (T*)result;
        } catch (std::invalid_argument& e) {
          // no conversion could be made
        }
      }
    }

    printf("ERROR! Couldn't find %s\n", intf_name.c_str());
  }

  template <typename T = void>
  T* get_raw(const std::string& intf_name)
  {
    for (auto* list_ptr = interface_list; list_ptr; list_ptr = list_ptr->next) {
      if (intf_name == list_ptr->name) {
        auto* result = list_ptr->func();
        printf("%s v%.3d: 0x%X\n",
               intf_name.substr(0, intf_name.length() - 3).c_str(),
               std::stoi(intf_name.substr(intf_name.length() - 3)),
               (uintptr_t)result);
        return (T*)result;
      }
    }

    printf("ERROR! Couldn't find %s\n", intf_name.c_str());
  }

  std::string dump_all()
  {
    std::stringstream ss;
    for (auto* list_ptr = interface_list; list_ptr; list_ptr = list_ptr->next) {
      ss << list_ptr->name << std::endl;
    }

    return std::move(ss.str());
  }

    return std::move(ss.str());
  }
};