Beacon capturing stops after being in monitor mode for 60 seconds

[ghost]

Hi All,

For some reason, my WiFi sniffer(Tenda U12 AC1300) stops capturing beacons after 60 seconds. In order to enable beacons capturing for next 60 seconds I have to rerun the command: sudo ifconfig wlan0 down && sudo iwconfig wlan0 mode monitor && sudo ifconfig wlan0 up

Found a note here: https://www.kismetwireless.net/docs/readme/datasources_wifi/ "The rtl8812 and rtl8814 drivers (available at https://github.com/aircrack-ng/rtl8812au.git) support monitor mode, however they do not properly implement the mac80211 control layer; while they support creating VIFs for monitor mode, they do not actually provide packets."

My setup: uname: 4.15.0-55-generic #60-Ubuntu x86_64 GNU/Linux dkms output: rtl8812au, 5.6.4.1, 4.15.0-55-generic, x86_64: installed Wi-Fi adapter: Tenda U12 AC1300 iwconfig: wlan0 IEEE 802.11b ESSID:"" Nickname:"WIFI@REALTEK" Mode:Monitor Frequency:5.5 GHz Access Point: Not-Associated
Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 ifconfig: wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 unspec 50-2B-73-C0-09-99-30-3A-00-00-00-00-00-00-00-00 txqueuelen 1000 (UNSPEC) RX packets 1887348 bytes 0 (0.0 B) RX errors 0 dropped 1069878 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 iw dev: phy#0 Interface wlan0 ifindex 3 wdev 0x1 addr 50:2b:73:c0:09:99 type monitor txpower 12.00 dBm

tshark output: 17373 59.005796842 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17390 59.108212131 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17407 59.210597559 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17430 59.313010622 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17446 59.415413675 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17478 59.517805037 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17503 59.620207741 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17516 59.722089904 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17542 59.824998077 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17552 59.873609033 Probe Response, SN=3334, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 17553 59.873610566 Acknowledgement, Flags=........C 802.11 100 6 802.11a 17573 59.927331602 ff:ff:ff:ff:ff:ff Beacon frame, SN=0, FN=0, Flags=........C, BI=100, SSID=vk1234 802.11 100 6 802.11a 18210 64.943925293 Acknowledgement, Flags=........C 802.11 100 6 802.11a 18564 66.475847250 Acknowledgement, Flags=........C 802.11 100 6 802.11a 18565 66.475848042 Acknowledgement, Flags=........C 802.11 100 6 802.11a 18684 67.403587962 Acknowledgement, Flags=........C 802.11 100 6 802.11a 19137 69.913690958 Acknowledgement, Flags=........C 802.11 100 6 802.11a 19607 72.424756644 Acknowledgement, Flags=........C 802.11 100 6 802.11a 19620 72.474747045 Acknowledgement, Flags=........C 802.11 100 6 802.11a

[NoahAndrews]

I can reproduce this issue, though I got 533 seconds of successful sniffing.

[victor-ab]

Same issue here!

[kimocoder]

@ViacheslavKlepach @NoahAndrews @v-borges

Move over to v5.6.4.2, Realtek did some work to it, so hopefully it'll be better. Frame injection and better IOCTL handling is also packed.

Hopefully the issue will be resolved, if not.. feel free to re-open the issue :+1: thanks

[vladinko0]

Issue still persists.

[cedricbambooza]

pls consider closing the issue, when it's solved by now :)