dhclient fails to obtain the IP address from some WiFi networks

[Yuri]

On 3/23/19 3:07 AM, Eugene Grosbein wrote:
> There was several important changes to dhclient not so long ago.
> Please describe the case in detail, including exact branch and revision of your FreeBSD system
> and relevant messages of "dmesg -a" output. And output of tcpdump too, if possible.
>

System revision: 12.0-STABLE #1 r344209


The only dmesg messages during one unsuccessful session were:

Mar 22 09:53:41 sw wpa_supplicant[3397]: Successfully initialized 
wpa_supplicant
Mar 22 09:53:42 sw kernel: run0: firmware RT3071 ver. 0.33 loaded
Mar 22 09:53:51 sw wpa_supplicant[3398]: wlan0: Trying to associate with 
68:bc:1c:c8:26:4e (SSID='xx' freq=5805 MHz)
Mar 22 09:53:51 sw wpa_supplicant[3398]: Failed to add supported 
operating classes IE
Mar 22 09:53:52 sw wpa_supplicant[3398]: wlan0: Associated with 
68:bc:1c:c8:26:4e
Mar 22 09:53:52 sw kernel: wlan0: link state changed to UP
Mar 22 09:53:52 sw wpa_supplicant[3398]: wlan0: CTRL-EVENT-CONNECTED - 
Connection to 68:bc:1c:c8:26:4e completed [id=1 id_str=]
Mar 22 09:55:15 sw dhclient[3435]: New IP Address (wlan0): 10.99.52.90
Mar 22 09:55:15 sw dhclient[3436]: New Subnet Mask (wlan0): 255.255.255.0
Mar 22 09:55:15 sw dhclient[3437]: New Broadcast Address (wlan0): 
10.99.52.255
Mar 22 09:55:15 sw dhclient[3438]: New Routers (wlan0): 10.99.52.1
Mar 22 09:55:16 sw dhclient[3440]: New Routers (wlan0): 10.99.52.1
Mar 22 09:55:42 sw wpa_supplicant[3398]: wlan0: CTRL-EVENT-DISCONNECTED 
bssid=68:bc:1c:c8:26:4e reason=3 locally_generated=1
Mar 22 09:55:42 sw kernel: wlan0: link state changed to DOWN

tcpdump isn't possible at this time.
But everything that dhclient was sending is in kdump files.


Yuri