Q4-Deauth after auth request
===========================================

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        Topics in this section,

                * :ref:`Learnings in this section <wifi_ldd_wi-fi_dev_ap_ques4_step_1>`

                * :ref:`Version Info <wifi_ldd_wi-fi_dev_ap_ques4_step_2>`

                * :ref:`Problem Statement <wifi_ldd_wi-fi_dev_ap_ques4_step_3>`

                * :ref:`Approach and code flow <wifi_ldd_wi-fi_dev_ap_ques4_step_4>`

                * :ref:`Actual change and Patch <wifi_ldd_wi-fi_dev_ap_ques4_step_5>`

                * :ref:`Wireshark capture <wifi_ldd_wi-fi_dev_ap_ques4_step_6>`


.. _wifi_ldd_wi-fi_dev_ap_ques4_step_1:
  
.. tab-set::

   .. tab-item:: Learnings in this section

        * In this section, you are going to learn


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                * How to send de-authentication packet on reception of authentication request packet from STA


.. _wifi_ldd_wi-fi_dev_ap_ques4_step_2:

.. tab-set::
 
    .. tab-item:: Version Info

        =============================== =======================================
        #                               Version
        =============================== =======================================
        Ubuntu                          Ubuntu 22.04 64 bit
        Linux Kernel                    6.9.2
	Hostapd                         hostapd 2.10
        =============================== =======================================


.. _wifi_ldd_wi-fi_dev_ap_ques4_step_3:
  
.. tab-set::

   .. tab-item:: Problem Statement

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                * Send de-authentication packet on reception of authentication request packet from STA

		* Add a configuration parameter called "deauth_on_auth_request_rx" in hostapd conf file

		* If "deauth_on_auth_request_rx=0", then this feature is disabled

		* If "deauth_on_auth_request_rx=1", then this feature is enabled


.. _wifi_ldd_wi-fi_dev_ap_ques4_step_4:
  
.. tab-set::

   .. tab-item:: Approach and code flow

	* Call flow for send de-authentication packet on reception of authentication request packet from STA

	.. literalinclude:: send_deauth_after_auth_req_callflow.txt


.. _wifi_ldd_wi-fi_dev_ap_ques4_step_5:
  
.. tab-set::

   .. tab-item:: Actual change and Patch

	* Download the below patch file

	:download:`send_deauth_after_auth_req.patch <send_deauth_after_auth_req.patch>`

	.. dropdown:: See the full content of patch file

            .. literalinclude:: send_deauth_after_auth_req.patch

	.. code-block:: shell

                test:~$ pwd
                /home/test

        * Make sure internet is available in laptop to download hostapd package

        .. code-block:: shell

                test:~$ sudo wget http://w1.fi/releases/hostapd-2.10.tar.gz

        * Create a directory

        .. code-block:: shell

                test:~$ mkdir hostapd

        * Change directory to hostapd

        .. code-block:: shell

                test:~$ cd hostapd

        * Note : Your present working directory should be hostapd

        .. code-block:: shell
        
                test:~$ pwd
                /home/test/hostapd/

        * Extract hostapd

        .. code-block:: shell

                test:~$ sudo tar -xvf ~/hostapd-2.10.tar.gz
		patching file hostapd-2.10/hostapd/config_file.c
		patching file hostapd-2.10/src/ap/ap_config.h
		patching file hostapd-2.10/src/ap/ieee802_11.c
	
	* Run the below command to apply patch 

	.. code-block:: shell

		test:~$ patch -p1 < send_deauth_after_auth_req.patch

	* Change directory to hostapd

	.. code-block:: shell

                test:~$ cd hostapd-2.10/hostapd/

	* Check the current working directory using pwd command

	* Make sure your current working directory is hostapd

	.. code-block:: shell

                test:~$ pwd
		/home/test/hostapd/hostapd-2.10/hostapd/

	* Copy the contents of defconfig file to .config file

	.. code-block:: shell

                test:~$ sudo cp defconfig .config

	* Compile hostapd

	.. code-block:: shell

                test:~$ sudo make

	* Create run_hostapd.conf

	.. code-block:: shell

                test:~$ sudo vim ./run_hostapd.conf

		ctrl_interface=/run/hostapd
		interface=wlan0
		driver=nl80211
		ssid=test_open
		hw_mode=g
		channel=6
		macaddr_acl=0
		auth_algs=1
		ignore_broadcast_ssid=0
		deauth_on_auth_request_rx=1	
	
	* Run hostapd

	.. code-block:: shell

                test:~$ sudo ./hostapd ./run_hostapd.conf


.. _wifi_ldd_wi-fi_dev_ap_ques4_step_6:
  
.. tab-set::

   .. tab-item:: Wireshark capture

	* Download file to check wireshark output

	:download:`deauth_after_auth_req.pcapng <deauth_after_auth_req.pcapng>`

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                * Check for de-authentication packet

		* Check packet No.119 and 120

		* Observe 119 is authentication request packet and 120 is deauthentication packet


	.. image:: deauth_after_auth_req.png
                :alt: Diagram
                :width: 800
                :height: 400