Byte 1 is version byte 2 is pad and byte 3-4 is length of radiotap in bytes right ?
does this info sit in offset 0 of the data i get when i am sniffing ? cause the first bytes i get has value 84 and from what i understand it should have been 0. and length i get is 40,000 and changing ... anyidea ? On Wed, May 13, 2009 at 6:00 PM, David Young <[email protected]> wrote: > On Wed, May 13, 2009 at 05:49:32PM -0400, Eddie Harari wrote: > > Hello , > > > > I am sniffing packets and my nic is on monitor mode, > > the DLT type i get from pcap is 127 which is RADIOTAP header... > > > > from what i understood byte 3 on the header contains the length of the > > radiotap information preceding the 802.11 frame, > > and 2 bytes prior to byte 3 should be set to 0 , ( version, and pad ). > > The length field is 16 bits wide (two bytes) and little-endian. > > Dave > > -- > David Young OJC Technologies > [email protected] Urbana, IL * (217) 278-3933 > - > This is the tcpdump-workers list. > Visit https://cod.sandelman.ca/ to unsubscribe. > - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
