Q3-Send-deauth
Topics in this section,
In this section, you are going to learn
How to send de-authentication packet once every 30 seconds
# |
Version |
|---|---|
Ubuntu |
Ubuntu 22.04 64 bit |
Linux Kernel |
6.9.2 |
Supplicant |
wpa_supplicant 2.10 |
Send De-Authentication packet once every 30 seconds
Add a configuration parameter called “periodic_deauth=30” in supplicant conf file
If “periodic_deauth=0”, then this feature is disabled
If “periodic_deauth=5”, then deauth is sent at every 5th second
Call flow for send de-authentication packet once every 30 seconds
nl80211_global_init ()
wpa_driver_nl80211_init_nl_global ()
send_scan_event ()
process_global_event ()
do_process_drv_event ()
mlme_event ()
send_scan_event ()
mlme_event_auth ()
mlme_event_assoc ()
wpa_supplicant_event ()
wpa_supplicant_event_assoc ()
wpa_supplicant_set_state ()
sta_send_deauth ()
Download the below patch file
send_deauth_pkt_every_30sec.patch
See the full content of patch file
diff -crB original/wpa_supplicant-2.10/src/utils/os.h changed/wpa_supplicant-2.10/src/utils/os.h
*** original/wpa_supplicant-2.10/src/utils/os.h 2022-01-17 02:21:29.000000000 +0530
--- changed/wpa_supplicant-2.10/src/utils/os.h 2024-07-25 16:27:00.553596397 +0530
***************
*** 42,47 ****
--- 42,48 ----
*/
int os_get_reltime(struct os_reltime *t);
+ void sta_get_curtime();
/* Helpers for handling struct os_time */
diff -crB original/wpa_supplicant-2.10/src/utils/os_unix.c changed/wpa_supplicant-2.10/src/utils/os_unix.c
*** original/wpa_supplicant-2.10/src/utils/os_unix.c 2022-01-17 02:21:29.000000000 +0530
--- changed/wpa_supplicant-2.10/src/utils/os_unix.c 2024-07-25 16:26:54.853596485 +0530
***************
*** 72,77 ****
--- 72,88 ----
return res;
}
+ void sta_get_curtime()
+ {
+ struct timeval tv;
+ struct timezone tz;
+ struct tm *today;
+
+ gettimeofday(&tv, &tz);
+
+ today = localtime(&tv.tv_sec);
+
+ }
int os_get_reltime(struct os_reltime *t)
{
diff -crB original/wpa_supplicant-2.10/wpa_supplicant/config_file.c changed/wpa_supplicant-2.10/wpa_supplicant/config_file.c
*** original/wpa_supplicant-2.10/wpa_supplicant/config_file.c 2022-01-17 02:21:29.000000000 +0530
--- changed/wpa_supplicant-2.10/wpa_supplicant/config_file.c 2024-07-25 16:32:05.149591670 +0530
***************
*** 329,335 ****
}
while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
! if (os_strcmp(pos, "network={") == 0) {
ssid = wpa_config_read_network(f, &line, id++);
if (ssid == NULL) {
wpa_printf(MSG_ERROR, "Line %d: failed to "
--- 329,338 ----
}
while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
! if (os_strncmp(pos, "periodic_deauth=",16) == 0) {
! config->periodic_deauth = atoi(pos+16);;
!
! } else if (os_strcmp(pos, "network={") == 0) {
ssid = wpa_config_read_network(f, &line, id++);
if (ssid == NULL) {
wpa_printf(MSG_ERROR, "Line %d: failed to "
diff -crB original/wpa_supplicant-2.10/wpa_supplicant/config.h changed/wpa_supplicant-2.10/wpa_supplicant/config.h
*** original/wpa_supplicant-2.10/wpa_supplicant/config.h 2022-01-17 02:21:29.000000000 +0530
--- changed/wpa_supplicant-2.10/wpa_supplicant/config.h 2024-07-25 16:27:21.757596068 +0530
***************
*** 1699,1704 ****
--- 1699,1705 ----
#endif /* CONFIG_TESTING_OPTIONS */
#endif /* CONFIG_PASN*/
+ int periodic_deauth;
};
diff -crB original/wpa_supplicant-2.10/wpa_supplicant/wpa_supplicant.c changed/wpa_supplicant-2.10/wpa_supplicant/wpa_supplicant.c
*** original/wpa_supplicant-2.10/wpa_supplicant/wpa_supplicant.c 2022-01-17 02:21:29.000000000 +0530
--- changed/wpa_supplicant-2.10/wpa_supplicant/wpa_supplicant.c 2024-07-25 16:33:46.837590092 +0530
***************
*** 905,910 ****
--- 905,922 ----
}
}
+ #define SME_WIFI_TIMEOUT 30
+ static int onetime_deauth_entry;
+
+ static void sta_send_deauth(void *eloop_ctx, void *timeout_ctx)
+ {
+ struct wpa_supplicant *wpa_s = eloop_ctx;
+
+ sta_get_curtime();
+ eloop_register_timeout(wpa_s->conf->periodic_deauth, 0, sta_send_deauth, wpa_s, NULL);
+ wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
+
+ }
/**
* wpa_supplicant_set_state - Set current connection state
***************
*** 926,932 ****
wpa_supplicant_state_txt(wpa_s->wpa_state),
wpa_supplicant_state_txt(state));
! if (state == WPA_COMPLETED &&
os_reltime_initialized(&wpa_s->roam_start)) {
os_reltime_age(&wpa_s->roam_start, &wpa_s->roam_time);
wpa_s->roam_start.sec = 0;
--- 938,947 ----
wpa_supplicant_state_txt(wpa_s->wpa_state),
wpa_supplicant_state_txt(state));
! if (state == WPA_COMPLETED && !(onetime_deauth_entry)) {
! onetime_deauth_entry = 1;
! eloop_register_timeout(SME_WIFI_TIMEOUT, 0, sta_send_deauth, wpa_s, NULL);
! } else if (state == WPA_COMPLETED &&
os_reltime_initialized(&wpa_s->roam_start)) {
os_reltime_age(&wpa_s->roam_start, &wpa_s->roam_time);
wpa_s->roam_start.sec = 0;
test:~$ pwd
/home/test
Make sure internet is available in laptop to download supplicant package
test:~$ sudo wget https://w1.fi/releases/wpa_supplicant-2.10.tar.gz
Create a directory
test:~$ mkdir supplicant
Change directory to supplicant
test:~$ cd supplicant
Note : Your present working directory should be supplicant
test:~$ pwd
/home/test/supplicant/
Extract wpa_supplicant
test:~$ sudo tar -xvf ~/wpa_supplicant-2.10.tar.gz
Run the below command to apply patch
test:~$ patch -p1 < send_deauth_pkt_every_30sec.patch
patching file wpa_supplicant-2.10/src/utils/os.h
patching file wpa_supplicant-2.10/src/utils/os_unix.c
patching file wpa_supplicant-2.10/wpa_supplicant/config_file.c
patching file wpa_supplicant-2.10/wpa_supplicant/config.h
patching file wpa_supplicant-2.10/wpa_supplicant/wpa_supplicant.c
Change directory to wpa_supplicant
test:~$ cd wpa_supplicant-2.10/wpa_supplicant/
Check the current working directory using pwd command
Make sure your current working directory is wpa_supplicant
test:~$ pwd
/home/test/supplicant/wpa_supplicant-2.10/wpa_supplicant
Copy the contents of defconfig file to .config file
test:~$ sudo cp defconfig .config
Compile wpa_supplicant
test:~$ sudo make
Create run_supplicant.conf
test:~$ sudo vim ./run_supplicant.conf
ctrl_interface=/run/wpa_supplicant
update_config=1
periodic_deauth=30
network={
ssid="test_open"
key_mgmt=NONE
}
Run wpa_supplicant
test:~$ sudo ./wpa_supplicant -Dnl80211 -i wlan1 -c ./run_supplicant.conf
Download file to check wireshark output
send_deauth_pkt_every_30sec.pcapng
Check for de-authentication packet
Apply display filter
wlan.addr == 02:00:00:00:01:00 && wlan.fc.type_subtype == 12
Observe the de-authentication packets with 30 sec time interval
