tcpdump mailing list archives
Re: 802.11 + radio headers question...
From: Eddie Harari <eddie.harari () gmail com>
Date: Wed, 15 Apr 2009 05:41:57 -0400
does it begin with IP headers or something preceds the IP headers ?For data frames, the frame body begins with an IEEE 802.2 header, possibly followed by a SNAP header, followed by the payload for the protocol being carried over 802.11, such as IP.
I did mean the Body part of the header, and i understand 802.2 precedes it, how ever there is something i am missing here... My data link type is 802.11_RADIO, when i sniff the packet and manipulate the data i got on it i see that the IP header is 22 bytes away from the DST_MAC. my question is: The IP header is 8 bytes into the body part of the 802.11 frame. 802.2 has 3 byte and snap is 5 byte long. the DST MAC is 4 byte into the 802.11 header (after FC and DURATION-ID ). the 802.11 header should be 24byte or 30byte ( 3 or 4 addresses ). so the gap between the 802.11 header and the ip header should have been 29 / 35 byte. in my case it is 26 byte offset. anyone ? - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- 802.11 + radio headers question... Eddie Harari (Apr 12)
- Re: 802.11 + radio headers question... Guy Harris (Apr 13)
- Re: 802.11 + radio headers question... Eddie Harari (Apr 14)
- Re: 802.11 + radio headers question... Mike Kershaw (Apr 14)
- Re: 802.11 + radio headers question... Eddie Harari (Apr 14)
- Re: 802.11 + radio headers question... David Young (Apr 14)
- Re: 802.11 + radio headers question... Guy Harris (Apr 14)
- Re: 802.11 + radio headers question... Mike Kershaw (Apr 14)
- Re: 802.11 + radio headers question... Eddie Harari (Apr 14)
- Re: 802.11 + radio headers question... Guy Harris (Apr 14)
- Re: 802.11 + radio headers question... Guy Harris (Apr 13)
- Re: 802.11 + radio headers question... Guy Harris (Apr 15)
- Re: 802.11 + radio headers question... Eddie Harari (Apr 15)
- Re: 802.11 + radio headers question... Guy Harris (Apr 15)
- Re: 802.11 + radio headers question... Eddie Harari (Apr 16)