akshar SNIFFER wrote:
I tried to capture raw 802.11b packets using libpcap library ,but i
did not get it( i got 802.3 packets).I used Intersil prism chip set 11g
card.Is there any private ioctl's ,using which i can take the raw 802.11b
packets directly from WLAN card.
On Linux, I think at least some of the 802.11 drivers won't supply
packets with 802.11 headers unless the interface is in monitor mode.
The way you put an interface into monitor mode depends, at least to some
degree, on the interface. This FAQ entry:
http://www.ethereal.com/faq#q5.38
discusses how that's done at the command line; the commands in question
put the interface into monitor mode using ioctls, or files in "/proc",
or whatever.
Note, though, that if you're not in monitor mode, I think most Linux
drivers might supply only data frames, not management frames (much less
control frames), in which case there's not much information lost by not
getting raw 802.11 headers.
