You may receive an error saying that the tvuplayer. There are a number of steps you can take to resolve this issue, and we’ll go over them now.
We’ve covered countless different aspects of WPA Supplicant in this blog, but we’ve overlooked one step – knowing what information to log about an issue and how to read it.
Let’s discuss some very useful information based on what I’ve found while working with it.
WPA request fire logs can be helpful when troubleshooting a client Wi-Fi connection. Unfortunately, it is easy to get bogged down or bogged down in the amount of understanding presented to you. Let’s start with how to start logging.
One way to configure WPA Supplicant is in the /etc/network/interfaces file like this:
wlan0 carAllow wlan0 hotplugiface wlan0 inet dhcp wpa-ssid netbeez-enterprise-wireless pre-up wpa_supplicant -B -Dwext,nl80211 -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf -f /var/log/wpa_supplicant.log -t -d post-down - I personally stop wpa_cli wlan0
As you can see, before the Linux host tries to get an IP address, it actually runs the wpa_supplicant pre-installation command. Detailed information about options can be found in this post. Then we’ll do it our way. to the last options:
three -n /var/log/wpa_supplicant.log: Specifies the file where wpa_supplicant will log all messages
-t: since you knew that each message in the log prints the time it occurred
-d: controls specific log verbosity (if missed entries are minimal, -d/-dd/-ddd increases overall log verbosity)
If the “-d” option is still omitted and you are accessing the primary wireless interface, you will see the following logs in /var/log/wpa_supplicant.log:
1555435443.013798: wpa_supplicant initialized successfully1555435444.393362: wlan0: Attempted to access 38:3b:c8:3e:d4:31s (SSID='netbeez' freq=2462 MHz).1555435444.539731: wlan0: connected at 38:3b:c8:3e:d4:311555435444.Wlan0:556641:CTRL-EVENT-REGDOM-CHANGE init=COUNTRY_IE type=COUNTRY alpha2=US1555435445.554016: wlan0: WPA: Key completed billing since 38:3b:c8:3e:d4:31 [PTK=CCMP GTK=TKIP]1555435445.554092: wlan0: CTRL-EVENT-CONNECTED - connection reached from 38:3b:c8:3e:d4:31 [id=0 id_str=]
Each line starts with the full epoch timestamp of the message, and the person will see the following important events:
By offering epoch timestamps, we can easily calculate and compute the time needed for every detail of the process. It took about 146 ms to study the association. To
Please note that the terminology displayed in the entries does not always correspond to the specific commonly used Wi-Fi terminology. For example, when a client wants to join a Wi-Fi network, the home goes through the authentication and connection steps. However, wpa_supplicant refers to this “association process” as the maximum.
Increasing the level of detail by one level with the “-d” option results in something like the following output:
1554225851.374782: wpa_supplicant v2.41554225851.375317: randomly selected: trying to read from /dev/random entropy1554225851.375399: wpa_supplicant initialized successfully1554225851.375438: driver initialization "wlan0" incontinence "/etc/wpa_supplicant/wpa_supplicant.conf" "nl80211, wext" ctrl_interface bridge "n/a" "n/a"1554225851.375471: configuration file '/etc/wpa_supplicant/wpa_supplicant.conf' -> '/etc/wpa_supplicant/wpa_supplicant.conf'1554225851.375500: Reading configuration file '/etc/wpa_supplicant/wpa_supplicant.conf'1554225851.375597: ctrl_interface='DIR=/var/run/wpa_supplicant'1554225851.375635: update_config=11554225851.444974: priority group 01554225851.444995: id=0 ssid='netbeez'1554225851.445931: rfkill: initial only: idx=0 type=1 op=0 soft=0 hard=01554225851.446353: nl80211: Cipher 00-0f-ac:1 supported1554225851.446371:nl80211: supported cipher 00-0f-ac:51554225851.446385: nl80211: supported cipher 00-0f-ac:2….1554225851.494927: wpa_driver_nl80211_set_key: ifindex=3 (wlan0) alg=0 addr=(nil) key_idx=0 seq_len=0 set_tx=0 key_len=01554225851.495031: wpa_driver_nl80211_set_key: ifindex=3 Alg=0 (wlan0) addr=(nil) key_idx=1 set_tx=0 seq_len=0 key_len=01554225851.wpa_driver_nl80211_set_key: 495088: ifindex=3 (wlan0) alg=0 addr=(nil) key_idx=2 set_tx=0 seq_len=0 key_len=01554225851.495144: wpa_driver_nl80211_set_key: ifindex=3 (wlan0) alg=0 addr=(nil) key_idx=3 set_tx=0 key_len=0…seq_len=0..1554225851.543376: wlan0: DISABLED status: -> DISABLED1554225851.543388: nl80211: set work state wlan0 0->0 (REST)1554225851.543402: netlink: operating state: ifindex=3 linkmode=-1 (no change from operating state=5), (IF_OPER_DORMANT)1554225851.543442: Demonize..1554225851.544360: random: received 20/20 bytes in /dev/random1554225851.544609: RTM_NEWLINK: ifi_index=3 ifi_index=3 ifname=wlan0 operstate=2 linkmode=0 ifi_family=0 ifi_flags=0x11003 ([UP][LOWER_UP])1554225851.544710: RTM_NEWLINK: ifi_index=3 ifi_index=3 ifname=wlan0 operstate=6 ifi_family=0 linkmode=0 ifi_flags=0x11043 ([UP][RUNNING][LOWER_UP])1554225851.RTM_NEWLINK: 544751: ifi_index=3 ifname=wlan0 operstate=5 linkmode=0 ifi_family=0 ifi_flags=0x11003 ([UP][LOWER_UP])1554225851.544789: RTM_NEWLINK: ifname=wlan0 ifi_index=3 operstate=5 linkmode=1 ifi_family=0 ifi_flags=0x11003 ([UP][LOWER_UP])1554225851.595586: wlan0: status: SCAN DISABLED… ->.1554244747.081250: wlan0:CTRL-EVENT-DISCONNECTED bssid=38:3b:c8:3e:d4:3a, reason=3 local_generated=1
And so on… To represent the comparison plan, we need “-d”, we had less than 10 signal lines, and if we use the “-d” option, it becomes more than 500.
As you can see, after the timestamp, these logs contain many different keywords, such as nl80211, wpa_driver_nl80211_set_key, netlin, RTM_NEWLINK, etc. So this logging level can be used more for debugging and maintaining performance by becoming a target for many different functions, most commonly associated with the wpa_supplicant process. Some of the related features include: drivers, internal debugging, not to mention non-message information, so you can definitely work with the WiFi protocol for romance.
In other cases, there are thoughts (for example, in the last main line) that sayWe are told that a breakup event occurred and the cause was simply “Reason = 3” with almost no other explanation. If you don’t look at the source code, you have absolutely no idea what this means. A link to established causes can be found here. Notes
mine would be to focus on messages starting with the keyword “wlan0”, which should be the name of the wireless user interface on the Linux host.
One of my most interesting log entries starts with “wlan0: with State:”. If you follow these specific entries, you will see the sequence match in the file: