Re: [PATCH] ieee80211 subsystem
From: Jean Tourrilhes <hidden>
Date: 2005-02-08 21:45:39
Stephen Hemminger wrote :
9. Isn't SNAP generic and not part of just wireless, LLC and other places like ATM have the similar stuff, maybe one set of routines and definitions?
SNAP is totally generic and IMHO should not be tied to the wireless stuff. I thought that SNAP was defined in 802.2, but RFC 1042 seems to be the place (which is older than 802.11 or ATM). First, if you use true IEEE 802.3 (as oppposed to the usual Ethernet II), the IP frames will use SNAP encapsulation (because the 802.3 frames don't have a type field). I don't think there is many networks using 802.3 (mostly admin config error), which is why Linux doesn't seem to support it. More importantly, there is a class of wireless drivers that would only need SNAP but not the rest of the 802.11 framework, because they use 802.3 frames natively. A good example is the Orinoco driver, you will find that the driver has SNAP encapsulation and decapsulation. I can't comment on the ATM stuff... I think IEEE has not changed their policy with respect to 802.2, so IMHO we can expect more standard from them requiring SNAP in the future. Have fun... Jean