From: Emmanuel Grumbach <egrumbach@gmail.com>
To: darklight wu <darklightwu@gmail.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: Failed to capture data packets using Monitor mode with Intel 7260 card. (Under Ubuntu 14.04)
Date: Tue, 19 May 2015 20:41:37 +0300 [thread overview]
Message-ID: <CANUX_P0rRqbks5LDiUjekTEjXV5nQoc1iSr4PhWd0cek7AnWQQ@mail.gmail.com> (raw)
In-Reply-To: <CALWn1pt-neiJhrQcEES4cktcfyL0+c2B=GUAh8+Xo0L06VmsfA@mail.gmail.com>
On Tue, May 19, 2015 at 7:44 PM, darklight wu <darklightwu@gmail.com> wrote:
> On Mon, May 18, 2015 at 3:26 PM, Emmanuel Grumbach <egrumbach@gmail.com> wrote:
>> On Mon, May 18, 2015 at 10:01 AM, darklight wu <darklightwu@gmail.com> wrote:
>>> Hi, All:
>>>
>>> I configured the Wifi Monitor mode with Intel 7260 card under
>>> Ubuntu14.04 and then used Wireshark to capture packets from air. But I
>>> could only get management/control packets but no data packets. I tried
>>> different channels and also with HT20 or HT40+/-.
>>>
>>> The commands I used were:
>>>
>>> iw dev wlan0 interface add mon0 type monitor
>>> iw dev wlan0 del //I googled and was told I needed to delete the
>>> wlan0 first. Or else I got device busy (-16) error
>>> ifconfig mon0 up
>>> iw dev mon0 set channel 1
>>>
>>> I also tried to use other ways like "airmon-ng start wlan0". All the
>>> observations were same, no data packets. It's weird! Anyone has a
>>> clue?
>>>
>>
>> This is weird. But I recommend to add power_scheme=1 as a module
>> parameter to iwlmvm. Since iwlmvm is loaded automatically, you'll need
>> to add that to /etc/modprobe.d/iwlwifi.conf.
>> 14.04 ships 3.13 and I remember we had issues with monitor mode at
>> that time. You may want to try a newer kernel.
>
> I tried again today with "power_scheme=1" and also booted with Ubuntu
> 15.04. Both still failed to work in monitor mode. And with Ubuntu
> 15.04, I event could not configure the nic to work on monitor mode.
> The same commands at least can set the monitor mode under 14.04.
> Meanwhile, I just want to clarify, the nic could capture data packets
> to/from itself but could not capture others that were not belongs to
> it. My co-worker tried on another machine with Ubuntu 14.04, he was
> also failed.
>
> Any tricks here?
You must not have any interface besides the monitor interface. I bet
you still have the wpa_supplicant running and this is why you only
have a virtual monitor interface that catches the packet from your
managed interface only.
next prev parent reply other threads:[~2015-05-19 17:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-18 7:01 Failed to capture data packets using Monitor mode with Intel 7260 card. (Under Ubuntu 14.04) darklight wu
2015-05-18 7:26 ` Emmanuel Grumbach
2015-05-19 16:44 ` darklight wu
2015-05-19 17:41 ` Emmanuel Grumbach [this message]
2015-05-20 3:43 ` Matt Chen
2015-05-20 4:00 ` darklight wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CANUX_P0rRqbks5LDiUjekTEjXV5nQoc1iSr4PhWd0cek7AnWQQ@mail.gmail.com \
--to=egrumbach@gmail.com \
--cc=darklightwu@gmail.com \
--cc=linux-wireless@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).