Date: Wed, 17 Sep 2003 12:43:08 -0700 From: Sam Leffler <sam@errno.com> To: "Kenneth D. Merry" <ken@kdm.org>, current@FreeBSD.org Subject: Re: ath(4) driver problems with WEP... Message-ID: <421524069.1063802588@melange.errno.com> In-Reply-To: <20030917031202.GA35362@panzer.kdm.org> References: <20030917031202.GA35362@panzer.kdm.org>
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> I've got a Netgear WAG511 (Atheros 5212-based card) and a Netgear FWAG114 > wireless router. > > I've been trying to get the card and the router talking under FreeBSD. > (Both 802.11a and 802.11g work fine under Windows on the same machine.) > > I'm using -current from September 15th. > > Anyway, whenever I try to get the card talking to the router, which is > running WEP (128 bit keys) on both the a and b/g sides, I get: > > ath0: authentication failed (reason 13) for [ base station MAC address ] > ath0: authentication failed (reason 13) for [ base station MAC address ] > ath0: authentication failed (reason 13) for [ base station MAC address ] > ath0: authentication failed (reason 13) for [ base station MAC address ] > ath0: authentication failed (reason 13) for [ base station MAC address ] > > Here's what the ifconfig looks like: > > ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > ether [ card mac address ] > media: IEEE 802.11 Wireless Ethernet autoselect mode 11a > (OFDM/6Mbps) status: no carrier > ssid [my ssid] 1:[my ssid] > channel -1 authmode OPEN powersavemode OFF powersavesleep 100 > wepmode MIXED weptxkey 1 > wepkey 1:128-bit wepkey 2:128-bit wepkey 3:128-bit wepkey > 4:128-bit > > I've verified and re-verified, via cut-and-paste from the router setup > screen, that the WEP key is correct. > Good news+bad news. I just committed a fix to ifconfig to correctly handle 128-bit WEP keys. I'm not sure how you thought you were setting your key up but ifconfig was barfing on anything more than 104 bits. FWIW ifconfig wrongly indicated keys >5 bytes (40 bits) were 128-bit keys; I also fixed that so ifconfig now indicates keys are 40-, 104-, or 128-bit according to their length. Beware also that wicontrol displays WEP keys longer than 104 bits zero-padded; I believe this is because of limitations in the RID API for fetching keys. Someone else may want to investigate that issue. The bad news is that with 128-bit keys installed I'm getting decryption errors at the AP. Actually, I'm seeing errors for any length key so it's likely a botch in the WEP frame construction in the driver. I've run out of time to look at this right now and will have to investigate later. > Anyway, I can't get the ath(4) driver to talk to the router when it is > running WEP. I have been able to get it to talk 802.11g to the router > without WEP enabled, though. > > I tried setting the authmode to shared via ifconfig, but from looking at > ieee80211_ioctl.c: > ># if 0 > case IEEE80211_IOC_AUTHMODE: > sc->wi_authmode = ireq->i_val; > break; ># endif > > i.e. I get EINVAL back. > > Is WEP supposed to work in -current? > authmode is not relevant. WEP worked at one time; I seem to have broken it. As I said above I will have to look at it later. > In a separate issue, the ath(4) driver can't see the 802.11a side of the > wireless router at all when it is running in 108Mbps "turbo" mode. If I > drop it down to 54Mbps, it sees it. (Works fine in Windows.) > > Is the ath(4) driver supposed to support the 108Mbps turbo mode? I was able to associate with an Atheros AP with turbo mode enabled but didn't get any higher throughput. I'm investigating this. FWIW I enabled turbo mode with: ifconfig ath0 mediaopt turbo I verified turbo mode was in use by disabling it on either station or AP side and with things mismatched the station/AP couldn't see each other. With turbo mode enabled on each side I was able to associate and communicate as normal; but netperf throughput was identical to the non-turbo setup. I'm asking Atheros folks for clarification on this--I may need to do some additional setup work to enable turbo operation. This is actually the first time I've tried turbo mode... Sam
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