Dan Williams wrote:
On Wed, 2006-06-07 at 17:57 +0200, Johannes Berg wrote:
On Wed, 2006-06-07 at 17:51 +0200, Johannes Berg wrote:
Well, it should be shown in the 802.11i spec too.
I suppose that it is the association request, and needs to contain the
RSN described in 7.3.2.25 as per 7.2.3.4 in 802.11i. This is, afaik, the
'generic IE' that is added with the wext. Now, it looks like the RSN
isn't included but the WPA2 info or something? Also, the genIE in your
log doesn't look correct to me, starting with ffffff?? Jouni, do you
have any idea what might be going on?
I believe that wpa_supplicant tells the driver what genie to use through
the SIOCSIWGENIE wext call. The IEs match between what the driver
appears to be reporting, and what wpa_supplicant says from the logs.
wpa_supplicant is almost certainly writing the correct IE to the driver
through wext, so I think the debug output from softmac must be
formatting the string incorrectly when printing it out to the logs.
Looking at it further:
struct ieee80211softmac_wpa {
char *IE;
int IElen;
int IEbuflen;
};
from ieee80211softmac_wx.c: ieee80211softmac_wx_set_genie()
memcpy(mac->wpa.IE, extra, wrqu->data.length);
dprintk(KERN_INFO PFX "generic IE set to ");
for (i=0;i<wrqu->data.length;i++)
dprintk("%.2x", mac->wpa.IE[i]);
dprintk("\n");
the dprintk code isn't doing the right thing here, given an array of
bytes. You probably want:
dprintk("%.2hhx", mac->wpa.IE[i]);
(ie, add the "hh" before the x to tell the print that it's a char)
That doesn't work - the result is
%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx%hx
I changed the line to cast the output byte as a u8 as follows:
dprintk("%.2x", (u8)mac->wpa.IE[i]);
This produces the line
generic IE set to dd160050f20101000050f20201000050f20201000050f202
This is the WPA IE supplied by wpa_supplicant and it matches the one used in the ndiswrapper case.
One mystery solved, but why doesn't it work?
Johannes - should I submit the patch to fix this printout, or would you like to
do it?
Larry
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