diff options
| -rw-r--r-- | include/linux/ieee80211.h | 4 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 4 | ||||
| -rw-r--r-- | net/mac80211/mlme.c | 71 | ||||
| -rw-r--r-- | net/mac80211/rx.c | 4 |
4 files changed, 44 insertions, 39 deletions
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index e46fea8b972e..8f80b3a93501 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -840,9 +840,7 @@ struct ieee80211_mgmt { } __packed wme_action; struct{ u8 action_code; - u8 element_id; - u8 length; - struct ieee80211_channel_sw_ie sw_elem; + u8 variable[0]; } __packed chan_switch; struct{ u8 action_code; diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 8d5dcbf17bbc..373460f9c069 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1252,10 +1252,6 @@ void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata); int ieee80211_max_network_latency(struct notifier_block *nb, unsigned long data, void *dummy); int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata); -void -ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, - const struct ieee80211_channel_sw_ie *sw_elem, - struct ieee80211_bss *bss, u64 timestamp); void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata); void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 2a2c45354498..ade3cd6c337d 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1020,33 +1020,37 @@ static void ieee80211_chswitch_timer(unsigned long data) ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work); } -void +static void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, - const struct ieee80211_channel_sw_ie *sw_elem, - struct ieee80211_bss *bss, u64 timestamp) + u64 timestamp, struct ieee802_11_elems *elems) { - struct cfg80211_bss *cbss = - container_of((void *)bss, struct cfg80211_bss, priv); - struct ieee80211_channel *new_ch; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; - int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num, - cbss->channel->band); + struct cfg80211_bss *cbss = ifmgd->associated; + struct ieee80211_bss *bss; + struct ieee80211_channel *new_ch; + int new_freq; struct ieee80211_chanctx *chanctx; ASSERT_MGD_MTX(ifmgd); - if (!ifmgd->associated) + if (!cbss) return; if (sdata->local->scanning) return; - /* Disregard subsequent beacons if we are already running a timer - processing a CSA */ - + /* disregard subsequent announcements if we are already processing */ if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) return; + if (!elems->ch_switch_ie) + return; + + bss = (void *)cbss->priv; + + new_freq = ieee80211_channel_to_frequency( + elems->ch_switch_ie->new_ch_num, + cbss->channel->band); new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) { sdata_info(sdata, @@ -1086,7 +1090,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, sdata->local->csa_channel = new_ch; - if (sw_elem->mode) + if (elems->ch_switch_ie->mode) ieee80211_stop_queues_by_reason(&sdata->local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); @@ -1095,9 +1099,9 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, /* use driver's channel switch callback */ struct ieee80211_channel_switch ch_switch = { .timestamp = timestamp, - .block_tx = sw_elem->mode, + .block_tx = elems->ch_switch_ie->mode, .channel = new_ch, - .count = sw_elem->count, + .count = elems->ch_switch_ie->count, }; drv_channel_switch(sdata->local, &ch_switch); @@ -1105,11 +1109,11 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, } /* channel switch handled in software */ - if (sw_elem->count <= 1) + if (elems->ch_switch_ie->count <= 1) ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work); else mod_timer(&ifmgd->chswitch_timer, - TU_TO_EXP_TIME(sw_elem->count * + TU_TO_EXP_TIME(elems->ch_switch_ie->count * cbss->beacon_interval)); } @@ -2655,7 +2659,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, if (bss) ieee80211_rx_bss_put(local, bss); - if (!sdata->u.mgd.associated) + if (!sdata->u.mgd.associated || + !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) return; if (need_ps) { @@ -2664,10 +2669,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, mutex_unlock(&local->iflist_mtx); } - if (elems->ch_switch_ie && - memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0) - ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie, - bss, rx_status->mactime); + ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, elems); } @@ -3061,14 +3063,27 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss); break; case IEEE80211_STYPE_ACTION: - switch (mgmt->u.action.category) { - case WLAN_CATEGORY_SPECTRUM_MGMT: + if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { + struct ieee802_11_elems elems; + int ies_len = skb->len - + offsetof(struct ieee80211_mgmt, + u.action.u.chan_switch.variable); + + if (ies_len < 0) + break; + + ieee802_11_parse_elems( + mgmt->u.action.u.chan_switch.variable, + ies_len, &elems); + + if (elems.parse_error) + break; + ieee80211_sta_process_chanswitch(sdata, - &mgmt->u.action.u.chan_switch.sw_elem, - (void *)ifmgd->associated->priv, - rx_status->mactime); - break; + rx_status->mactime, + &elems); } + break; } mutex_unlock(&ifmgd->mtx); diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 5168f89c754d..e9825f15c14c 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2507,10 +2507,6 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx) ieee80211_process_measurement_req(sdata, mgmt, len); goto handled; case WLAN_ACTION_SPCT_CHL_SWITCH: - if (len < (IEEE80211_MIN_ACTION_SIZE + - sizeof(mgmt->u.action.u.chan_switch))) - break; - if (sdata->vif.type != NL80211_IFTYPE_STATION) break; |