Re: [Madwifi-devel] unable to attach cipher AES-CCM (solved)

[Nicholas J K. <ni...@kr...>]

Did some digging... and then added some more verbose debug messages to
net80211/ieee80211_crypto_ccmp.c. From this I discovered wlan_ccmp was
not able to load AES crypto support; I simply didn't have it compiled in
my kernel - blah!

Since I should have noticed the problem and had this solved long ago,
might be a good idea to keep debug info similar to the following in
net80211/ieee80211_crypto_ccmp.c (aka I did not realize wlan_ccmp would
need to load AES crypto support outside of the madwifi modules):

--- ieee80211_crypto_ccmp.c     2006-04-28 11:26:29.000000000 -0700
+++ ieee80211_crypto_ccmp.c-nick        2006-04-28 11:26:19.000000000 -0700
@@ -107,6 +110,9 @@
        ctx->cc_ic = vap->iv_ic;
        ctx->cc_tfm = crypto_alloc_tfm("aes", 0);
        if (ctx->cc_tfm == NULL) {
+               IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO,
+                       "%s: unable to load AES crypto support\n",
+                       __func__);
                FREE(ctx, M_DEVBUF);
                _MOD_DEC_USE(THIS_MODULE);
                return NULL;

Thanks,
    - nick

Nicholas J Kreucher wrote:
> Hello!
>
> Posted this odd behavior to the madwifi-users list but did not get a response... thought I'd try here.
>
> I am having a problem with WPA2 and CCMP, while WPA with TKIP works fine. Seems the wlan_ccmp module loads ok, but is not being used properly.
>
> wpa_supplicant reports:
>   WPA: Installing PTK to the driver.
>   wpa_driver_madwifi_set_key: alg=CCMP key_idx=0 set_tx=1 seq_len=6 key_len=16
>   ioctl[IEEE80211_IOCTL_SETKEY]: No such device or address
>   WPA: Failed to set PTK to the driver.
>
> Setting 80211debug +crypto +wpa revels:
>   ath0: ieee80211_crypto_newkey: unable to attach cipher AES-CCM
>
>
> Loaded modules: (note wlan_ccmp usage count is 0)
>   ath_pci                97764  0
>   ath_rate_sample        13248  1 ath_pci
>   ath_hal               189584  3 ath_pci,ath_rate_sample
>   wlan_wep                7232  0
>   wlan_scan_sta          15168  1
>   wlan_tkip              13056  1
>   wlan_ccmp               8768  0
>   wlan                  202396  7
>   ath_pci,ath_rate_sample,wlan_wep,wlan_scan_sta,wlan_tkip,wlan_ccmp
>
>
> Module Information:
>   wlan: 0.8.4.2 (svn 1502)
>   ath_hal: 0.9.16.16 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
>   ath_rate_sample: 1.2 (svn 1502)
>   ath_pci: 0.9.4.5 (svn 1502)
>   ACPI: PCI Interrupt 0000:01:07.0[A] -> Link [LNK4] -> GSI 11 (level,
>   low) -> IRQ 11
>   wifi0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
>   wifi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
>   wifi0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps
>   24Mbps 36Mbps 48Mbps 54Mbps
>   wifi0: turboA rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
>   wifi0: turboG rates: 6Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
>   wifi0: H/W encryption support: WEP AES AES_CCM TKIP
>   wifi0: mac 5.9 phy 4.3 radio 3.6
>   wifi0: Use hw queue 1 for WME_AC_BE traffic
>   wifi0: Use hw queue 0 for WME_AC_BK traffic
>   wifi0: Use hw queue 2 for WME_AC_VI traffic
>   wifi0: Use hw queue 3 for WME_AC_VO traffic
>   wifi0: Use hw queue 8 for CAB traffic
>   wifi0: Use hw queue 9 for beacons
>   wifi0: Atheros 5212: mem=0xea000000, irq=11
>
> Machine Information:
>   Gentoo Linux, 2.6.15-gentoo-r1, wpa-supplicant-0.4.8, Linksys WMP55AG PCI Adapter
>
> Any suggestions or hints on how to further debug would be great. Thanks!
>
> Nicholas J Kreucher
>
>