libnl, bug question, and lib query

libnl, bug question, and lib query

[Carl Fürstenberg]

I'll start this up with three different question, hope that's not a
problem instead of sending three different mails.

First I wonder if I should, in a production environment using the
nl80211, stick to use libnl 1.* or should I use use the git 2.0?

Second I have noticed a problem regarding reg set/get which I can't
pin down where it goes wrong (reboot resolves the issue). Following is
how I can reproduce it. Notice all the nonsense input I used. I don't
know what exactly triggers it, but the "set DU seems to be a good
candidate"
wlan:/home/test# iw reg set US
wlan:/home/test# iw reg get
country US:
	(2402 - 2472 @ 40), (3, 27)
	(5170 - 5250 @ 40), (3, 17)
	(5250 - 5330 @ 40), (3, 20), DFS
	(5490 - 5600 @ 40), (3, 20), DFS
	(5650 - 5710 @ 40), (3, 20), DFS
	(5735 - 5835 @ 40), (3, 30)
wlan:/home/test# iw reg set CH
wlan:/home/test# iw reg get
country CH:
	(2402 - 2482 @ 40), (N/A, 20)
	(5170 - 5250 @ 40), (N/A, 20)
	(5250 - 5330 @ 40), (N/A, 20), DFS
	(5490 - 5710 @ 40), (N/A, 27), DFS
wlan:/home/test#  iw reg set DU
wlan:/home/test# iw reg get
country CH:
	(2402 - 2482 @ 40), (N/A, 20)
	(5170 - 5250 @ 40), (N/A, 20)
	(5250 - 5330 @ 40), (N/A, 20), DFS
	(5490 - 5710 @ 40), (N/A, 27), DFS
wlan:/home/test# iw reg set WO
wlan:/home/test# iw reg get
country CH:
	(2402 - 2482 @ 40), (N/A, 20)
	(5170 - 5250 @ 40), (N/A, 20)
	(5250 - 5330 @ 40), (N/A, 20), DFS
	(5490 - 5710 @ 40), (N/A, 27), DFS
wlan:/home/test# iw reg set W
not a valid ISO/IEC 3166-1 alpha2
Special non-alpha2 usable entries:
	00	World Regulatory domain
wlan:/home/test# iw reg set 00
wlan:/home/test# iw reg set W
not a valid ISO/IEC 3166-1 alpha2
Special non-alpha2 usable entries:
	00	World Regulatory domain
wlan:/home/test# iw reg get
country CH:
	(2402 - 2482 @ 40), (N/A, 20)
	(5170 - 5250 @ 40), (N/A, 20)
	(5250 - 5330 @ 40), (N/A, 20), DFS
	(5490 - 5710 @ 40), (N/A, 27), DFS
wlan:/home/test# iw reg set 00
wlan:/home/test# iw --debug reg set 00
-- Debug: Received Message:
--------------------------   BEGIN NETLINK MESSAGE ---------------------------
  [HEADER] 16 octets
    .nlmsg_len = 36
    .nlmsg_type = 2 <ERROR>
    .nlmsg_flags = 0 <>
    .nlmsg_seq = 1262372471
    .nlmsg_pid = 11999
  [ERRORMSG] 20 octets
    .error = 0 "Success"
  [ORIGINAL MESSAGE] 16 octets
    .nlmsg_len = 16
    .nlmsg_type = 17 <0x11>
    .nlmsg_flags = 5 <REQUEST,ACK>
    .nlmsg_seq = 1262372471
    .nlmsg_pid = 11999
---------------------------  END NETLINK MESSAGE   ---------------------------



Lastly I wonder if there is any plans to extract all relevant parts of
iw to some sort of libiw? Would be helpful for us :)
-- 
/Carl Fürstenberg <azatoth@gmail.com>

Re: libnl, bug question, and lib query

[Kalle Valo]

Carl Fürstenberg <azatoth@gmail.com> writes:

> I'll start this up with three different question, hope that's not a
> problem instead of sending three different mails.
>
> First I wonder if I should, in a production environment using the
> nl80211, stick to use libnl 1.* or should I use use the git 2.0?

I have heard that libnl 2.0 does not have stable API currently. So
it's better to avoid it.

-- 
Kalle Valo