diff options
| author | Abhijeet Kolekar <abhijeet.kolekar@intel.com> | 2008-04-16 14:02:04 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-04-23 21:25:34 -0400 |
| commit | a46f025d053e47b9ce602f53f6d30e94d304a51c (patch) | |
| tree | 21b453785f61c8dd3113721d651aafa7ce01b0f0 /net | |
| parent | d7d313000ba2fc94a5383511a17ff38a39bab928 (diff) | |
| download | lwn-a46f025d053e47b9ce602f53f6d30e94d304a51c.tar.gz lwn-a46f025d053e47b9ce602f53f6d30e94d304a51c.zip | |
mac80211: Fix n-band association problem
There are two structures named wmm_info and wmm_param, they are used while
parsing the beacon frame. (Check the function ieee802_11_parse_elems).
Certain APs like D-link does not set the fifth bit in WMM IE.
While sending the association request to n-only ap it checks for wmm_ie.
If it is set then only ieee80211_ht_cap is sent during association request.
So n-only association fails.
And this patch fixes this problem by copying the wmm_info to wmm_ie,
which enables the "wmm" flag in iee80211_send_assoc.
Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Acked-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/mlme.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 6b75cb6c6300..c0a5345c8a61 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2709,7 +2709,26 @@ static void ieee80211_rx_bss_info(struct net_device *dev, bss->wmm_ie_len = elems.wmm_param_len + 2; } else bss->wmm_ie_len = 0; - } else if (!elems.wmm_param && bss->wmm_ie) { + } else if (elems.wmm_info && + (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len || + memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) { + /* As for certain AP's Fifth bit is not set in WMM IE in + * beacon frames.So while parsing the beacon frame the + * wmm_info structure is used instead of wmm_param. + * wmm_info structure was never used to set bss->wmm_ie. + * This code fixes this problem by copying the WME + * information from wmm_info to bss->wmm_ie and enabling + * n-band association. + */ + kfree(bss->wmm_ie); + bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC); + if (bss->wmm_ie) { + memcpy(bss->wmm_ie, elems.wmm_info - 2, + elems.wmm_info_len + 2); + bss->wmm_ie_len = elems.wmm_info_len + 2; + } else + bss->wmm_ie_len = 0; + } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) { kfree(bss->wmm_ie); bss->wmm_ie = NULL; bss->wmm_ie_len = 0; |