From: Roberto Riggio <roberto.riggio@create-net.org>
To: "Gábor Stefanik" <netrolller.3d@gmail.com>
Cc: linux-wireless@vger.kernel.org
Subject: Re: Packet injection with ath9k
Date: Fri, 07 May 2010 21:09:56 +0200 [thread overview]
Message-ID: <4BE46584.5060304@create-net.org> (raw)
In-Reply-To: <j2v69e28c911005070935wb720d757labf3a0484aedefb8@mail.gmail.com>
Hi,
well, that is what i wanted to understand. These are the struct
that I'm using to compose the rediotap header:
struct ieee80211_radiotap_header {
u_int8_t it_version;
u_int8_t it_pad;
u_int16_t it_len;
u_int32_t it_present;
} __attribute__((__packed__));
struct click_radiotap_header {
struct ieee80211_radiotap_header wt_ihdr;
u_int8_t wt_rate;
u_int8_t wt_txpower;
u_int8_t wt_rts_retries;
u_int8_t wt_data_retries;
};
The flags are set in order to take into account the fields that I
specify. But i do not know at which point the frame are
dropped.
R.
On 05/07/2010 06:35 PM, Gábor Stefanik wrote:
> Hi!
> Are you sure it is not your injector that is having alignment issues?
> AFAIK the radiotap parser explicitly uses endianness-aware function
> everywhere.
>
> On Fri, May 7, 2010 at 6:13 PM, Roberto Riggio
> <roberto.riggio@create-net.org> wrote:
>
>> Hi,
>>
>> I'm writing an application to inject traffic over a wireless interface. This
>> app
>> is working fine on an x86 machine. However if i compile the same app for
>> an arm platform, no frame are sent over the wireless interface (ath9k).
>>
>> I'm guessing that this is because of some alignment issues but i cannot
>> track
>> the piece of code that is actually parsing the frame. I've found the
>> __ieee80211_parse_tx_radiotap in net/mac80211/tx.c function, but it is
>> not called when i try to inject some traffic, so the frame are dropped
>> before that.
>>
>> Any hints?
>>
>> Thanks
>> R.
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
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>>
>>
>
>
>
next prev parent reply other threads:[~2010-05-07 19:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-07 16:13 Packet injection with ath9k Roberto Riggio
2010-05-07 16:35 ` Gábor Stefanik
2010-05-07 19:09 ` Roberto Riggio [this message]
2010-05-09 20:24 ` Gábor Stefanik
2010-05-12 16:42 ` Roberto Riggio
2010-05-12 16:46 ` Johannes Berg
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