diff options
author | Johannes Berg <johannes.berg@intel.com> | 2010-07-29 16:08:55 +0200 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2010-07-29 12:55:00 -0400 |
commit | e5b900d228b76d445a4240d9aeb3cd8f79205a91 (patch) | |
tree | dffa32e827e2d6e5388430ae5ec732f0ca023b11 /net/mac80211 | |
parent | d28232b461b8d54b09e59325dbac8b0913ce2049 (diff) | |
download | kernel_samsung_smdk4412-e5b900d228b76d445a4240d9aeb3cd8f79205a91.zip kernel_samsung_smdk4412-e5b900d228b76d445a4240d9aeb3cd8f79205a91.tar.gz kernel_samsung_smdk4412-e5b900d228b76d445a4240d9aeb3cd8f79205a91.tar.bz2 |
mac80211: allow drivers to request DTIM period
Some features require knowing the DTIM period
before associating. This implements the ability
to wait for a beacon in mac80211 before assoc
to provide this value. It is optional since
most likely not all drivers will need this.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r-- | net/mac80211/ieee80211_i.h | 1 | ||||
-rw-r--r-- | net/mac80211/mlme.c | 32 | ||||
-rw-r--r-- | net/mac80211/scan.c | 4 | ||||
-rw-r--r-- | net/mac80211/work.c | 43 |
4 files changed, 77 insertions, 3 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index ef47006..65e0ed6 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -238,6 +238,7 @@ enum ieee80211_work_type { IEEE80211_WORK_ABORT, IEEE80211_WORK_DIRECT_PROBE, IEEE80211_WORK_AUTH, + IEEE80211_WORK_ASSOC_BEACON_WAIT, IEEE80211_WORK_ASSOC, IEEE80211_WORK_REMAIN_ON_CHANNEL, }; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index cf8d721..b6c163a 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -870,6 +870,11 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, ieee80211_led_assoc(local, 1); + if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) + bss_conf->dtim_period = bss->dtim_period; + else + bss_conf->dtim_period = 0; + bss_conf->assoc = 1; /* * For now just always ask the driver to update the basic rateset @@ -1751,7 +1756,8 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, if (wk->sdata != sdata) continue; - if (wk->type != IEEE80211_WORK_ASSOC) + if (wk->type != IEEE80211_WORK_ASSOC && + wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT) continue; if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN)) @@ -2086,6 +2092,8 @@ static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, struct sk_buff *skb) { struct ieee80211_mgmt *mgmt; + struct ieee80211_rx_status *rx_status; + struct ieee802_11_elems elems; u16 status; if (!skb) { @@ -2093,6 +2101,19 @@ static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk, return WORK_DONE_DESTROY; } + if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) { + mutex_lock(&wk->sdata->u.mgd.mtx); + rx_status = (void *) skb->cb; + ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems); + ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status, + &elems, true); + mutex_unlock(&wk->sdata->u.mgd.mtx); + + wk->type = IEEE80211_WORK_ASSOC; + /* not really done yet */ + return WORK_DONE_REQUEUE; + } + mgmt = (void *)skb->data; status = le16_to_cpu(mgmt->u.assoc_resp.status_code); @@ -2206,10 +2227,14 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, if (req->prev_bssid) memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN); - wk->type = IEEE80211_WORK_ASSOC; wk->chan = req->bss->channel; wk->sdata = sdata; wk->done = ieee80211_assoc_done; + if (!bss->dtim_period && + sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) + wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT; + else + wk->type = IEEE80211_WORK_ASSOC; if (req->use_mfp) { ifmgd->mfp = IEEE80211_MFP_REQUIRED; @@ -2257,7 +2282,8 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, if (wk->type != IEEE80211_WORK_DIRECT_PROBE && wk->type != IEEE80211_WORK_AUTH && - wk->type != IEEE80211_WORK_ASSOC) + wk->type != IEEE80211_WORK_ASSOC && + wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT) continue; if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN)) diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 41635b2..41f20fb 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -114,6 +114,10 @@ ieee80211_bss_info_update(struct ieee80211_local *local, bss->dtim_period = tim_ie->dtim_period; } + /* If the beacon had no TIM IE, or it was invalid, use 1 */ + if (beacon && !bss->dtim_period) + bss->dtim_period = 1; + /* replace old supported rates if we get new values */ srlen = 0; if (elems->supp_rates) { diff --git a/net/mac80211/work.c b/net/mac80211/work.c index c22a71c..81d4ad6 100644 --- a/net/mac80211/work.c +++ b/net/mac80211/work.c @@ -560,6 +560,22 @@ ieee80211_remain_on_channel_timeout(struct ieee80211_work *wk) return WORK_ACT_TIMEOUT; } +static enum work_action __must_check +ieee80211_assoc_beacon_wait(struct ieee80211_work *wk) +{ + if (wk->started) + return WORK_ACT_TIMEOUT; + + /* + * Wait up to one beacon interval ... + * should this be more if we miss one? + */ + printk(KERN_DEBUG "%s: waiting for beacon from %pM\n", + wk->sdata->name, wk->filter_ta); + wk->timeout = TU_TO_EXP_TIME(wk->assoc.bss->beacon_interval); + return WORK_ACT_NONE; +} + static void ieee80211_auth_challenge(struct ieee80211_work *wk, struct ieee80211_mgmt *mgmt, size_t len) @@ -709,6 +725,25 @@ ieee80211_rx_mgmt_probe_resp(struct ieee80211_work *wk, return WORK_ACT_DONE; } +static enum work_action __must_check +ieee80211_rx_mgmt_beacon(struct ieee80211_work *wk, + struct ieee80211_mgmt *mgmt, size_t len) +{ + struct ieee80211_sub_if_data *sdata = wk->sdata; + struct ieee80211_local *local = sdata->local; + + ASSERT_WORK_MTX(local); + + if (wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT) + return WORK_ACT_MISMATCH; + + if (len < 24 + 12) + return WORK_ACT_NONE; + + printk(KERN_DEBUG "%s: beacon received\n", sdata->name); + return WORK_ACT_DONE; +} + static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local, struct sk_buff *skb) { @@ -731,6 +766,7 @@ static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local, case IEEE80211_WORK_DIRECT_PROBE: case IEEE80211_WORK_AUTH: case IEEE80211_WORK_ASSOC: + case IEEE80211_WORK_ASSOC_BEACON_WAIT: bssid = wk->filter_ta; break; default: @@ -745,6 +781,9 @@ static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local, continue; switch (fc & IEEE80211_FCTL_STYPE) { + case IEEE80211_STYPE_BEACON: + rma = ieee80211_rx_mgmt_beacon(wk, mgmt, skb->len); + break; case IEEE80211_STYPE_PROBE_RESP: rma = ieee80211_rx_mgmt_probe_resp(wk, mgmt, skb->len, rx_status); @@ -916,6 +955,9 @@ static void ieee80211_work_work(struct work_struct *work) case IEEE80211_WORK_REMAIN_ON_CHANNEL: rma = ieee80211_remain_on_channel_timeout(wk); break; + case IEEE80211_WORK_ASSOC_BEACON_WAIT: + rma = ieee80211_assoc_beacon_wait(wk); + break; } wk->started = started; @@ -1065,6 +1107,7 @@ ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata, case IEEE80211_STYPE_PROBE_RESP: case IEEE80211_STYPE_ASSOC_RESP: case IEEE80211_STYPE_REASSOC_RESP: + case IEEE80211_STYPE_BEACON: skb_queue_tail(&local->work_skb_queue, skb); ieee80211_queue_work(&local->hw, &local->work_work); return RX_QUEUED; |