/**
 * @file detach.cpp
 * @author Sina Karvandi (sina@hyperdbg.org)
 * @brief .detach command
 * @details
 * @version 0.1
 * @date 2020-08-28
 *
 * @copyright This project is released under the GNU Public License v3.
 *
 */
#include "pch.h"

//
// Global Variables
//
extern BOOLEAN                  g_IsVmmModuleLoaded;
extern ACTIVE_DEBUGGING_PROCESS g_ActiveProcessDebuggingState;

/**
 * @brief help of the .detach command
 *
 * @return VOID
 */
VOID
CommandDetachHelp()
{
    ShowMessages(".detach : detaches from debugging a user-mode process.\n\n");

    ShowMessages("syntax : \t.detach \n");
}

/**
 * @brief perform detach from process
 *
 * @return VOID
 */
VOID
DetachFromProcess()
{
    DEBUGGER_ATTACH_DETACH_USER_MODE_PROCESS DetachRequest = {0};

    //
    // Check if debugger is loaded or not
    //
    AssertShowMessageReturnStmt(g_IsVmmModuleLoaded, g_DeviceHandle, ASSERT_MESSAGE_VMM_NOT_LOADED, ASSERT_MESSAGE_DRIVER_NOT_LOADED, AssertReturn);

    //
    // Check if we attached to a process or not
    //
    if (!g_ActiveProcessDebuggingState.IsActive)
    {
        ShowMessages("you're not attached to any thread\n");
        return;
    }

    //
    // Perform the detaching of the target process
    //
    UdDetachProcess(g_ActiveProcessDebuggingState.ProcessId, g_ActiveProcessDebuggingState.ProcessDebuggingToken);
}

/**
 * @brief .detach command handler
 *
 * @param CommandTokens
 * @param Command
 *
 * @return VOID
 */
VOID
CommandDetach(vector<CommandToken> CommandTokens, string Command)
{
    if (CommandTokens.size() >= 2)
    {
        ShowMessages("incorrect use of the '%s'\n\n",
                     GetCaseSensitiveStringFromCommandToken(CommandTokens.at(0)).c_str());
        CommandDetachHelp();
        return;
    }

    //
    // Perform detach from the process
    //
    DetachFromProcess();
}