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authorJohannes Berg <johannes@sipsolutions.net>2008-09-09 08:42:50 -0400
committerJohn W. Linville <linville@tuxdriver.com>2008-09-11 15:53:39 -0400
commitde1ede7ac3bd300f9aa565d0f93f6cf9ba74bb1a (patch)
tree82e48b4140e9444104639a97aa55be03c5020466
parent5825fe100d654fff89aa67a1e202af1f8a7f0ad0 (diff)
mac80211: make BA session handling independent of STA mode
The aggregation handling isn't dependent on anything related to our STA-mode implementation, and doesn't need to depend on it for frame processing. This patch moves the relevant code to ht.c and adds a hook in rx.c. For now, the relevant action frames are only processed in STA/IBSS modes, but that's now something we can easily change. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat
-rw-r--r--net/mac80211/ht.c303
-rw-r--r--net/mac80211/ieee80211_i.h39
-rw-r--r--net/mac80211/mlme.c340
-rw-r--r--net/mac80211/rx.c60
4 files changed, 380 insertions, 362 deletions
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index c72b3fe3ccdb..7e93e1079ade 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -66,9 +66,10 @@ int ieee80211_ht_addt_info_ie_to_ht_bss_info(
66 return 0; 66 return 0;
67} 67}
68 68
69void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da, 69static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
70 u16 tid, u8 dialog_token, u16 start_seq_num, 70 const u8 *da, u16 tid,
71 u16 agg_size, u16 timeout) 71 u8 dialog_token, u16 start_seq_num,
72 u16 agg_size, u16 timeout)
72{ 73{
73 struct ieee80211_local *local = sdata->local; 74 struct ieee80211_local *local = sdata->local;
74 struct ieee80211_if_sta *ifsta = &sdata->u.sta; 75 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
@@ -115,8 +116,55 @@ void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8
115 ieee80211_sta_tx(sdata, skb, 0); 116 ieee80211_sta_tx(sdata, skb, 0);
116} 117}
117 118
118void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid, 119static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
119 u16 initiator, u16 reason_code) 120 u8 dialog_token, u16 status, u16 policy,
121 u16 buf_size, u16 timeout)
122{
123 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
124 struct ieee80211_local *local = sdata->local;
125 struct sk_buff *skb;
126 struct ieee80211_mgmt *mgmt;
127 u16 capab;
128
129 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
130
131 if (!skb) {
132 printk(KERN_DEBUG "%s: failed to allocate buffer "
133 "for addba resp frame\n", sdata->dev->name);
134 return;
135 }
136
137 skb_reserve(skb, local->hw.extra_tx_headroom);
138 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
139 memset(mgmt, 0, 24);
140 memcpy(mgmt->da, da, ETH_ALEN);
141 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
142 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
143 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
144 else
145 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
146 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
147 IEEE80211_STYPE_ACTION);
148
149 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
150 mgmt->u.action.category = WLAN_CATEGORY_BACK;
151 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
152 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
153
154 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
155 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
156 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
157
158 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
159 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
160 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
161
162 ieee80211_sta_tx(sdata, skb, 0);
163}
164
165static void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
166 const u8 *da, u16 tid,
167 u16 initiator, u16 reason_code)
120{ 168{
121 struct ieee80211_local *local = sdata->local; 169 struct ieee80211_local *local = sdata->local;
122 struct ieee80211_if_sta *ifsta = &sdata->u.sta; 170 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
@@ -263,7 +311,7 @@ void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *r
263 * add Block Ack response will arrive from the recipient. 311 * add Block Ack response will arrive from the recipient.
264 * If this timer expires sta_addba_resp_timer_expired will be executed. 312 * If this timer expires sta_addba_resp_timer_expired will be executed.
265 */ 313 */
266void sta_addba_resp_timer_expired(unsigned long data) 314static void sta_addba_resp_timer_expired(unsigned long data)
267{ 315{
268 /* not an elegant detour, but there is no choice as the timer passes 316 /* not an elegant detour, but there is no choice as the timer passes
269 * only one argument, and both sta_info and TID are needed, so init 317 * only one argument, and both sta_info and TID are needed, so init
@@ -699,3 +747,246 @@ void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
699 tasklet_schedule(&local->tasklet); 747 tasklet_schedule(&local->tasklet);
700} 748}
701EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); 749EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
750
751/*
752 * After accepting the AddBA Request we activated a timer,
753 * resetting it after each frame that arrives from the originator.
754 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
755 */
756static void sta_rx_agg_session_timer_expired(unsigned long data)
757{
758 /* not an elegant detour, but there is no choice as the timer passes
759 * only one argument, and various sta_info are needed here, so init
760 * flow in sta_info_create gives the TID as data, while the timer_to_id
761 * array gives the sta through container_of */
762 u8 *ptid = (u8 *)data;
763 u8 *timer_to_id = ptid - *ptid;
764 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
765 timer_to_tid[0]);
766
767#ifdef CONFIG_MAC80211_HT_DEBUG
768 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
769#endif
770 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
771 (u16)*ptid, WLAN_BACK_TIMER,
772 WLAN_REASON_QSTA_TIMEOUT);
773}
774
775void ieee80211_process_addba_request(struct ieee80211_local *local,
776 struct sta_info *sta,
777 struct ieee80211_mgmt *mgmt,
778 size_t len)
779{
780 struct ieee80211_hw *hw = &local->hw;
781 struct ieee80211_conf *conf = &hw->conf;
782 struct tid_ampdu_rx *tid_agg_rx;
783 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
784 u8 dialog_token;
785 int ret = -EOPNOTSUPP;
786 DECLARE_MAC_BUF(mac);
787
788 /* extract session parameters from addba request frame */
789 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
790 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
791 start_seq_num =
792 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
793
794 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
795 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
796 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
797 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
798
799 status = WLAN_STATUS_REQUEST_DECLINED;
800
801 /* sanity check for incoming parameters:
802 * check if configuration can support the BA policy
803 * and if buffer size does not exceeds max value */
804 if (((ba_policy != 1)
805 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
806 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
807 status = WLAN_STATUS_INVALID_QOS_PARAM;
808#ifdef CONFIG_MAC80211_HT_DEBUG
809 if (net_ratelimit())
810 printk(KERN_DEBUG "AddBA Req with bad params from "
811 "%s on tid %u. policy %d, buffer size %d\n",
812 print_mac(mac, mgmt->sa), tid, ba_policy,
813 buf_size);
814#endif /* CONFIG_MAC80211_HT_DEBUG */
815 goto end_no_lock;
816 }
817 /* determine default buffer size */
818 if (buf_size == 0) {
819 struct ieee80211_supported_band *sband;
820
821 sband = local->hw.wiphy->bands[conf->channel->band];
822 buf_size = IEEE80211_MIN_AMPDU_BUF;
823 buf_size = buf_size << sband->ht_info.ampdu_factor;
824 }
825
826
827 /* examine state machine */
828 spin_lock_bh(&sta->lock);
829
830 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
831#ifdef CONFIG_MAC80211_HT_DEBUG
832 if (net_ratelimit())
833 printk(KERN_DEBUG "unexpected AddBA Req from "
834 "%s on tid %u\n",
835 print_mac(mac, mgmt->sa), tid);
836#endif /* CONFIG_MAC80211_HT_DEBUG */
837 goto end;
838 }
839
840 /* prepare A-MPDU MLME for Rx aggregation */
841 sta->ampdu_mlme.tid_rx[tid] =
842 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
843 if (!sta->ampdu_mlme.tid_rx[tid]) {
844#ifdef CONFIG_MAC80211_HT_DEBUG
845 if (net_ratelimit())
846 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
847 tid);
848#endif
849 goto end;
850 }
851 /* rx timer */
852 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
853 sta_rx_agg_session_timer_expired;
854 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
855 (unsigned long)&sta->timer_to_tid[tid];
856 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
857
858 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
859
860 /* prepare reordering buffer */
861 tid_agg_rx->reorder_buf =
862 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
863 if (!tid_agg_rx->reorder_buf) {
864#ifdef CONFIG_MAC80211_HT_DEBUG
865 if (net_ratelimit())
866 printk(KERN_ERR "can not allocate reordering buffer "
867 "to tid %d\n", tid);
868#endif
869 kfree(sta->ampdu_mlme.tid_rx[tid]);
870 goto end;
871 }
872 memset(tid_agg_rx->reorder_buf, 0,
873 buf_size * sizeof(struct sk_buff *));
874
875 if (local->ops->ampdu_action)
876 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
877 sta->addr, tid, &start_seq_num);
878#ifdef CONFIG_MAC80211_HT_DEBUG
879 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
880#endif /* CONFIG_MAC80211_HT_DEBUG */
881
882 if (ret) {
883 kfree(tid_agg_rx->reorder_buf);
884 kfree(tid_agg_rx);
885 sta->ampdu_mlme.tid_rx[tid] = NULL;
886 goto end;
887 }
888
889 /* change state and send addba resp */
890 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
891 tid_agg_rx->dialog_token = dialog_token;
892 tid_agg_rx->ssn = start_seq_num;
893 tid_agg_rx->head_seq_num = start_seq_num;
894 tid_agg_rx->buf_size = buf_size;
895 tid_agg_rx->timeout = timeout;
896 tid_agg_rx->stored_mpdu_num = 0;
897 status = WLAN_STATUS_SUCCESS;
898end:
899 spin_unlock_bh(&sta->lock);
900
901end_no_lock:
902 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
903 dialog_token, status, 1, buf_size, timeout);
904}
905
906void ieee80211_process_addba_resp(struct ieee80211_local *local,
907 struct sta_info *sta,
908 struct ieee80211_mgmt *mgmt,
909 size_t len)
910{
911 struct ieee80211_hw *hw = &local->hw;
912 u16 capab;
913 u16 tid;
914 u8 *state;
915
916 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
917 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
918
919 state = &sta->ampdu_mlme.tid_state_tx[tid];
920
921 spin_lock_bh(&sta->lock);
922
923 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
924 spin_unlock_bh(&sta->lock);
925 return;
926 }
927
928 if (mgmt->u.action.u.addba_resp.dialog_token !=
929 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
930 spin_unlock_bh(&sta->lock);
931#ifdef CONFIG_MAC80211_HT_DEBUG
932 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
933#endif /* CONFIG_MAC80211_HT_DEBUG */
934 return;
935 }
936
937 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
938#ifdef CONFIG_MAC80211_HT_DEBUG
939 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
940#endif /* CONFIG_MAC80211_HT_DEBUG */
941 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
942 == WLAN_STATUS_SUCCESS) {
943 *state |= HT_ADDBA_RECEIVED_MSK;
944 sta->ampdu_mlme.addba_req_num[tid] = 0;
945
946 if (*state == HT_AGG_STATE_OPERATIONAL)
947 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
948
949 spin_unlock_bh(&sta->lock);
950 } else {
951 sta->ampdu_mlme.addba_req_num[tid]++;
952 /* this will allow the state check in stop_BA_session */
953 *state = HT_AGG_STATE_OPERATIONAL;
954 spin_unlock_bh(&sta->lock);
955 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
956 WLAN_BACK_INITIATOR);
957 }
958}
959
960void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
961 struct sta_info *sta,
962 struct ieee80211_mgmt *mgmt, size_t len)
963{
964 struct ieee80211_local *local = sdata->local;
965 u16 tid, params;
966 u16 initiator;
967 DECLARE_MAC_BUF(mac);
968
969 params = le16_to_cpu(mgmt->u.action.u.delba.params);
970 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
971 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
972
973#ifdef CONFIG_MAC80211_HT_DEBUG
974 if (net_ratelimit())
975 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
976 print_mac(mac, mgmt->sa),
977 initiator ? "initiator" : "recipient", tid,
978 mgmt->u.action.u.delba.reason_code);
979#endif /* CONFIG_MAC80211_HT_DEBUG */
980
981 if (initiator == WLAN_BACK_INITIATOR)
982 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
983 WLAN_BACK_INITIATOR, 0);
984 else { /* WLAN_BACK_RECIPIENT */
985 spin_lock_bh(&sta->lock);
986 sta->ampdu_mlme.tid_state_tx[tid] =
987 HT_AGG_STATE_OPERATIONAL;
988 spin_unlock_bh(&sta->lock);
989 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
990 WLAN_BACK_RECIPIENT);
991 }
992}
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index b10e70715db0..60ec7ad27643 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -909,22 +909,6 @@ int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
909void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 909void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
910 u32 changed); 910 u32 changed);
911u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata); 911u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
912int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
913 struct ieee80211_ht_info *ht_info);
914int ieee80211_ht_addt_info_ie_to_ht_bss_info(
915 struct ieee80211_ht_addt_info *ht_add_info_ie,
916 struct ieee80211_ht_bss_info *bss_info);
917void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
918 u16 tid, u8 dialog_token, u16 start_seq_num,
919 u16 agg_size, u16 timeout);
920void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
921 u16 initiator, u16 reason_code);
922void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
923
924void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
925 u16 tid, u16 initiator, u16 reason);
926void sta_addba_resp_timer_expired(unsigned long data);
927void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
928u64 ieee80211_sta_get_rates(struct ieee80211_local *local, 912u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
929 struct ieee802_11_elems *elems, 913 struct ieee802_11_elems *elems,
930 enum ieee80211_band band); 914 enum ieee80211_band band);
@@ -977,6 +961,29 @@ int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
977int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev); 961int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
978int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev); 962int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
979 963
964/* HT */
965int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
966 struct ieee80211_ht_info *ht_info);
967int ieee80211_ht_addt_info_ie_to_ht_bss_info(
968 struct ieee80211_ht_addt_info *ht_add_info_ie,
969 struct ieee80211_ht_bss_info *bss_info);
970void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
971
972void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
973 u16 tid, u16 initiator, u16 reason);
974void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
975void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
976 struct sta_info *sta,
977 struct ieee80211_mgmt *mgmt, size_t len);
978void ieee80211_process_addba_resp(struct ieee80211_local *local,
979 struct sta_info *sta,
980 struct ieee80211_mgmt *mgmt,
981 size_t len);
982void ieee80211_process_addba_request(struct ieee80211_local *local,
983 struct sta_info *sta,
984 struct ieee80211_mgmt *mgmt,
985 size_t len);
986
980/* utility functions/constants */ 987/* utility functions/constants */
981extern void *mac80211_wiphy_privid; /* for wiphy privid */ 988extern void *mac80211_wiphy_privid; /* for wiphy privid */
982extern const unsigned char rfc1042_header[6]; 989extern const unsigned char rfc1042_header[6];
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index c22dcd605e48..25f90f7ccf3e 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -445,52 +445,6 @@ static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
445 ieee80211_sta_tx(sdata, skb, 0); 445 ieee80211_sta_tx(sdata, skb, 0);
446} 446}
447 447
448static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
449 u8 dialog_token, u16 status, u16 policy,
450 u16 buf_size, u16 timeout)
451{
452 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
453 struct ieee80211_local *local = sdata->local;
454 struct sk_buff *skb;
455 struct ieee80211_mgmt *mgmt;
456 u16 capab;
457
458 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
459
460 if (!skb) {
461 printk(KERN_DEBUG "%s: failed to allocate buffer "
462 "for addba resp frame\n", sdata->dev->name);
463 return;
464 }
465
466 skb_reserve(skb, local->hw.extra_tx_headroom);
467 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
468 memset(mgmt, 0, 24);
469 memcpy(mgmt->da, da, ETH_ALEN);
470 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
471 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
472 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
473 else
474 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
475 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
476 IEEE80211_STYPE_ACTION);
477
478 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
479 mgmt->u.action.category = WLAN_CATEGORY_BACK;
480 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
481 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
482
483 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
484 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
485 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
486
487 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
488 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
489 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
490
491 ieee80211_sta_tx(sdata, skb, 0);
492}
493
494static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, 448static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
495 struct ieee80211_msrment_ie *request_ie, 449 struct ieee80211_msrment_ie *request_ie,
496 const u8 *da, const u8 *bssid, 450 const u8 *da, const u8 *bssid,
@@ -1057,278 +1011,6 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1057 elems.challenge_len + 2, 1); 1011 elems.challenge_len + 2, 1);
1058} 1012}
1059 1013
1060/*
1061 * After accepting the AddBA Request we activated a timer,
1062 * resetting it after each frame that arrives from the originator.
1063 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1064 */
1065static void sta_rx_agg_session_timer_expired(unsigned long data)
1066{
1067 /* not an elegant detour, but there is no choice as the timer passes
1068 * only one argument, and various sta_info are needed here, so init
1069 * flow in sta_info_create gives the TID as data, while the timer_to_id
1070 * array gives the sta through container_of */
1071 u8 *ptid = (u8 *)data;
1072 u8 *timer_to_id = ptid - *ptid;
1073 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1074 timer_to_tid[0]);
1075
1076#ifdef CONFIG_MAC80211_HT_DEBUG
1077 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1078#endif
1079 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1080 (u16)*ptid, WLAN_BACK_TIMER,
1081 WLAN_REASON_QSTA_TIMEOUT);
1082}
1083
1084static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
1085 struct ieee80211_mgmt *mgmt,
1086 size_t len)
1087{
1088 struct ieee80211_hw *hw = &local->hw;
1089 struct ieee80211_conf *conf = &hw->conf;
1090 struct sta_info *sta;
1091 struct tid_ampdu_rx *tid_agg_rx;
1092 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1093 u8 dialog_token;
1094 int ret = -EOPNOTSUPP;
1095 DECLARE_MAC_BUF(mac);
1096
1097 rcu_read_lock();
1098
1099 sta = sta_info_get(local, mgmt->sa);
1100 if (!sta) {
1101 rcu_read_unlock();
1102 return;
1103 }
1104
1105 /* extract session parameters from addba request frame */
1106 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1107 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1108 start_seq_num =
1109 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1110
1111 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1112 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1113 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1114 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1115
1116 status = WLAN_STATUS_REQUEST_DECLINED;
1117
1118 /* sanity check for incoming parameters:
1119 * check if configuration can support the BA policy
1120 * and if buffer size does not exceeds max value */
1121 if (((ba_policy != 1)
1122 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1123 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1124 status = WLAN_STATUS_INVALID_QOS_PARAM;
1125#ifdef CONFIG_MAC80211_HT_DEBUG
1126 if (net_ratelimit())
1127 printk(KERN_DEBUG "AddBA Req with bad params from "
1128 "%s on tid %u. policy %d, buffer size %d\n",
1129 print_mac(mac, mgmt->sa), tid, ba_policy,
1130 buf_size);
1131#endif /* CONFIG_MAC80211_HT_DEBUG */
1132 goto end_no_lock;
1133 }
1134 /* determine default buffer size */
1135 if (buf_size == 0) {
1136 struct ieee80211_supported_band *sband;
1137
1138 sband = local->hw.wiphy->bands[conf->channel->band];
1139 buf_size = IEEE80211_MIN_AMPDU_BUF;
1140 buf_size = buf_size << sband->ht_info.ampdu_factor;
1141 }
1142
1143
1144 /* examine state machine */
1145 spin_lock_bh(&sta->lock);
1146
1147 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1148#ifdef CONFIG_MAC80211_HT_DEBUG
1149 if (net_ratelimit())
1150 printk(KERN_DEBUG "unexpected AddBA Req from "
1151 "%s on tid %u\n",
1152 print_mac(mac, mgmt->sa), tid);
1153#endif /* CONFIG_MAC80211_HT_DEBUG */
1154 goto end;
1155 }
1156
1157 /* prepare A-MPDU MLME for Rx aggregation */
1158 sta->ampdu_mlme.tid_rx[tid] =
1159 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1160 if (!sta->ampdu_mlme.tid_rx[tid]) {
1161#ifdef CONFIG_MAC80211_HT_DEBUG
1162 if (net_ratelimit())
1163 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1164 tid);
1165#endif
1166 goto end;
1167 }
1168 /* rx timer */
1169 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1170 sta_rx_agg_session_timer_expired;
1171 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1172 (unsigned long)&sta->timer_to_tid[tid];
1173 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1174
1175 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1176
1177 /* prepare reordering buffer */
1178 tid_agg_rx->reorder_buf =
1179 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1180 if (!tid_agg_rx->reorder_buf) {
1181#ifdef CONFIG_MAC80211_HT_DEBUG
1182 if (net_ratelimit())
1183 printk(KERN_ERR "can not allocate reordering buffer "
1184 "to tid %d\n", tid);
1185#endif
1186 kfree(sta->ampdu_mlme.tid_rx[tid]);
1187 goto end;
1188 }
1189 memset(tid_agg_rx->reorder_buf, 0,
1190 buf_size * sizeof(struct sk_buff *));
1191
1192 if (local->ops->ampdu_action)
1193 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1194 sta->addr, tid, &start_seq_num);
1195#ifdef CONFIG_MAC80211_HT_DEBUG
1196 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1197#endif /* CONFIG_MAC80211_HT_DEBUG */
1198
1199 if (ret) {
1200 kfree(tid_agg_rx->reorder_buf);
1201 kfree(tid_agg_rx);
1202 sta->ampdu_mlme.tid_rx[tid] = NULL;
1203 goto end;
1204 }
1205
1206 /* change state and send addba resp */
1207 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1208 tid_agg_rx->dialog_token = dialog_token;
1209 tid_agg_rx->ssn = start_seq_num;
1210 tid_agg_rx->head_seq_num = start_seq_num;
1211 tid_agg_rx->buf_size = buf_size;
1212 tid_agg_rx->timeout = timeout;
1213 tid_agg_rx->stored_mpdu_num = 0;
1214 status = WLAN_STATUS_SUCCESS;
1215end:
1216 spin_unlock_bh(&sta->lock);
1217
1218end_no_lock:
1219 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
1220 dialog_token, status, 1, buf_size, timeout);
1221 rcu_read_unlock();
1222}
1223
1224static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
1225 struct ieee80211_mgmt *mgmt,
1226 size_t len)
1227{
1228 struct ieee80211_hw *hw = &local->hw;
1229 struct sta_info *sta;
1230 u16 capab;
1231 u16 tid;
1232 u8 *state;
1233
1234 rcu_read_lock();
1235
1236 sta = sta_info_get(local, mgmt->sa);
1237 if (!sta) {
1238 rcu_read_unlock();
1239 return;
1240 }
1241
1242 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1243 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1244
1245 state = &sta->ampdu_mlme.tid_state_tx[tid];
1246
1247 spin_lock_bh(&sta->lock);
1248
1249 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1250 spin_unlock_bh(&sta->lock);
1251 goto addba_resp_exit;
1252 }
1253
1254 if (mgmt->u.action.u.addba_resp.dialog_token !=
1255 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1256 spin_unlock_bh(&sta->lock);
1257#ifdef CONFIG_MAC80211_HT_DEBUG
1258 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1259#endif /* CONFIG_MAC80211_HT_DEBUG */
1260 goto addba_resp_exit;
1261 }
1262
1263 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1264#ifdef CONFIG_MAC80211_HT_DEBUG
1265 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1266#endif /* CONFIG_MAC80211_HT_DEBUG */
1267 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1268 == WLAN_STATUS_SUCCESS) {
1269 *state |= HT_ADDBA_RECEIVED_MSK;
1270 sta->ampdu_mlme.addba_req_num[tid] = 0;
1271
1272 if (*state == HT_AGG_STATE_OPERATIONAL)
1273 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1274
1275 spin_unlock_bh(&sta->lock);
1276 } else {
1277 sta->ampdu_mlme.addba_req_num[tid]++;
1278 /* this will allow the state check in stop_BA_session */
1279 *state = HT_AGG_STATE_OPERATIONAL;
1280 spin_unlock_bh(&sta->lock);
1281 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1282 WLAN_BACK_INITIATOR);
1283 }
1284
1285addba_resp_exit:
1286 rcu_read_unlock();
1287}
1288
1289static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
1290 struct ieee80211_mgmt *mgmt, size_t len)
1291{
1292 struct ieee80211_local *local = sdata->local;
1293 struct sta_info *sta;
1294 u16 tid, params;
1295 u16 initiator;
1296 DECLARE_MAC_BUF(mac);
1297
1298 rcu_read_lock();
1299
1300 sta = sta_info_get(local, mgmt->sa);
1301 if (!sta) {
1302 rcu_read_unlock();
1303 return;
1304 }
1305
1306 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1307 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1308 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1309
1310#ifdef CONFIG_MAC80211_HT_DEBUG
1311 if (net_ratelimit())
1312 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1313 print_mac(mac, mgmt->sa),
1314 initiator ? "initiator" : "recipient", tid,
1315 mgmt->u.action.u.delba.reason_code);
1316#endif /* CONFIG_MAC80211_HT_DEBUG */
1317
1318 if (initiator == WLAN_BACK_INITIATOR)
1319 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
1320 WLAN_BACK_INITIATOR, 0);
1321 else { /* WLAN_BACK_RECIPIENT */
1322 spin_lock_bh(&sta->lock);
1323 sta->ampdu_mlme.tid_state_tx[tid] =
1324 HT_AGG_STATE_OPERATIONAL;
1325 spin_unlock_bh(&sta->lock);
1326 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1327 WLAN_BACK_RECIPIENT);
1328 }
1329 rcu_read_unlock();
1330}
1331
1332static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata, 1014static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1333 struct ieee80211_mgmt *mgmt, 1015 struct ieee80211_mgmt *mgmt,
1334 size_t len) 1016 size_t len)
@@ -2207,28 +1889,6 @@ static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
2207 break; 1889 break;
2208 } 1890 }
2209 break; 1891 break;
2210 case WLAN_CATEGORY_BACK:
2211 switch (mgmt->u.action.u.addba_req.action_code) {
2212 case WLAN_ACTION_ADDBA_REQ:
2213 if (len < (IEEE80211_MIN_ACTION_SIZE +
2214 sizeof(mgmt->u.action.u.addba_req)))
2215 break;
2216 ieee80211_sta_process_addba_request(local, mgmt, len);
2217 break;
2218 case WLAN_ACTION_ADDBA_RESP:
2219 if (len < (IEEE80211_MIN_ACTION_SIZE +
2220 sizeof(mgmt->u.action.u.addba_resp)))
2221 break;
2222 ieee80211_sta_process_addba_resp(local, mgmt, len);
2223 break;
2224 case WLAN_ACTION_DELBA:
2225 if (len < (IEEE80211_MIN_ACTION_SIZE +
2226 sizeof(mgmt->u.action.u.delba)))
2227 break;
2228 ieee80211_sta_process_delba(sdata, mgmt, len);
2229 break;
2230 }
2231 break;
2232 case PLINK_CATEGORY: 1892 case PLINK_CATEGORY:
2233 if (ieee80211_vif_is_mesh(&sdata->vif)) 1893 if (ieee80211_vif_is_mesh(&sdata->vif))
2234 mesh_rx_plink_frame(sdata, mgmt, len, rx_status); 1894 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 7e09b30dd393..71cce0bcc5be 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1511,6 +1511,65 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx)
1511} 1511}
1512 1512
1513static ieee80211_rx_result debug_noinline 1513static ieee80211_rx_result debug_noinline
1514ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
1515{
1516 struct ieee80211_local *local = rx->local;
1517 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
1518 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
1519 int len = rx->skb->len;
1520
1521 if (!ieee80211_is_action(mgmt->frame_control))
1522 return RX_CONTINUE;
1523
1524 if (!rx->sta)
1525 return RX_DROP_MONITOR;
1526
1527 if (!(rx->flags & IEEE80211_RX_RA_MATCH))
1528 return RX_DROP_MONITOR;
1529
1530 /* all categories we currently handle have action_code */
1531 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
1532 return RX_DROP_MONITOR;
1533
1534 /*
1535 * FIXME: revisit this, I'm sure we should handle most
1536 * of these frames in other modes as well!
1537 */
1538 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
1539 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
1540 return RX_DROP_MONITOR;
1541
1542 switch (mgmt->u.action.category) {
1543 case WLAN_CATEGORY_BACK:
1544 switch (mgmt->u.action.u.addba_req.action_code) {
1545 case WLAN_ACTION_ADDBA_REQ:
1546 if (len < (IEEE80211_MIN_ACTION_SIZE +
1547 sizeof(mgmt->u.action.u.addba_req)))
1548 return RX_DROP_MONITOR;
1549 ieee80211_process_addba_request(local, rx->sta, mgmt, len);
1550 break;
1551 case WLAN_ACTION_ADDBA_RESP:
1552 if (len < (IEEE80211_MIN_ACTION_SIZE +
1553 sizeof(mgmt->u.action.u.addba_resp)))
1554 return RX_DROP_MONITOR;
1555 ieee80211_process_addba_resp(local, rx->sta, mgmt, len);
1556 break;
1557 case WLAN_ACTION_DELBA:
1558 if (len < (IEEE80211_MIN_ACTION_SIZE +
1559 sizeof(mgmt->u.action.u.delba)))
1560 return RX_DROP_MONITOR;
1561 ieee80211_process_delba(sdata, rx->sta, mgmt, len);
1562 break;
1563 }
1564 rx->sta->rx_packets++;
1565 dev_kfree_skb(rx->skb);
1566 return RX_QUEUED;
1567 }
1568
1569 return RX_CONTINUE;
1570}
1571
1572static ieee80211_rx_result debug_noinline
1514ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) 1573ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
1515{ 1574{
1516 struct ieee80211_sub_if_data *sdata; 1575 struct ieee80211_sub_if_data *sdata;
@@ -1689,6 +1748,7 @@ static void ieee80211_invoke_rx_handlers(struct ieee80211_sub_if_data *sdata,
1689 CALL_RXH(ieee80211_rx_h_mesh_fwding); 1748 CALL_RXH(ieee80211_rx_h_mesh_fwding);
1690 CALL_RXH(ieee80211_rx_h_data) 1749 CALL_RXH(ieee80211_rx_h_data)
1691 CALL_RXH(ieee80211_rx_h_ctrl) 1750 CALL_RXH(ieee80211_rx_h_ctrl)
1751 CALL_RXH(ieee80211_rx_h_action)
1692 CALL_RXH(ieee80211_rx_h_mgmt) 1752 CALL_RXH(ieee80211_rx_h_mgmt)
1693 1753
1694#undef CALL_RXH 1754#undef CALL_RXH
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 02:42:22 -0500