[PATCH] wpa_supplicant: Add support for PS3 Linux wireless driver
mokuno at sm.sony.co.jp
Wed Feb 27 03:20:38 EST 2008
On Mon, 25 Feb 2008 14:00:40 -0500
Dan Williams <dcbw at redhat.com> wrote:
> On Mon, 2008-02-25 at 21:31 +0900, Masakazu Mokuno wrote:
> > Hi,
> > This adds support for PS3 wireless to wpa_supplicant.
> Hmm; could this please be an extension of the WEXT driver? Otherwise
> NetworkManager won't work automatically with the PS3 and wpa_supplicant,
> because NM only supports the WEXT driver of wpa_supplicant (for quite
> good reasons IMHO).
> We had discussed the possibility of extending WEXT to let userspace apps
> know that the driver handles the 4-Way handshake in firmware, which
> should allow wpa_supplicant to figure this out and do the right thing in
> driver_wext.c. We can certainly try to get such a flag added to WEXT in
> the kernel.
Yes we have some discussion...
Rough changes I can guess for that are somthing like the followings:
- Define a new capability bit to tell that the driver does 4way
handshake in the firmware, like:
#define IW_ENC_CAPA_WPA 0x00000001
#define IW_ENC_CAPA_WPA2 0x00000002
#define IW_ENC_CAPA_CIPHER_TKIP 0x00000004
#define IW_ENC_CAPA_CIPHER_CCMP 0x00000008
+ #define IW_ENC_CAPA_4WAY_HANDSHAKE 0x00000010
- Define new key types for PMK(PSK in WPA-personal) and/or WPA
passphrase for iw_encode_ext like:
/* struct iw_encode_ext ->ext_flags */
#define IW_ENCODE_EXT_TX_SEQ_VALID 0x00000001
#define IW_ENCODE_EXT_RX_SEQ_VALID 0x00000002
#define IW_ENCODE_EXT_GROUP_KEY 0x00000004
#define IW_ENCODE_EXT_SET_TX_KEY 0x00000008
+ #define IW_ENCODE_EXT_PMK 0x00000010
+ #define IW_ENCODE_EXT_WPA_PASSPHRASE 0x00000020
Userspace supplicants would do the followings:
o Check the enc_capa bits returned by SIOCGIWRANGE to see whether the
driver wants to do the 4way handshake in firmware.
o Call IW_AUT_KEY_MGMT of SIOCSIWAUTH with IW_AUTH_KEY_MGMT_PSK
enabled to tell the driver that the supplicant would pass PMK as PSK
o Set the PSK (or passphrase) to the driver with SIOCSIWENCODEEXT,
IW_ENCODE_EXT_PMK or IW_ENCODE_WPA_PASSPHRASE enabled
o Set other wireless parameters and trigger the association by
bringing up the interface or setting ssid.
The above is what I can guess now. I think there are
mistakes/misunderstanding in the above.
Jouni, how do you think?
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