diff options
| -rw-r--r-- | include/net/mac80211.h | 5 | ||||
| -rw-r--r-- | net/mac80211/sta_info.c | 70 |
2 files changed, 62 insertions, 13 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 25b18877747f..f4ab2fb4d50c 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -2119,6 +2119,11 @@ void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) * and also take care of the EOSP and MORE_DATA bits in the frame. * The driver may also use ieee80211_sta_eosp() in this case. + * + * Note that if the driver ever buffers frames other than QoS-data + * frames, it must take care to never send a non-QoS-data frame as + * the last frame in a service period, adding a QoS-nulldata frame + * after a non-QoS-data frame if needed. */ /** diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 93e2157a5b7b..decd30c1e290 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -1153,7 +1153,8 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, struct sta_info *sta, int tid, - enum ieee80211_frame_release_type reason) + enum ieee80211_frame_release_type reason, + bool call_driver) { struct ieee80211_local *local = sdata->local; struct ieee80211_qos_hdr *nullfunc; @@ -1211,7 +1212,9 @@ static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata, IEEE80211_TX_STATUS_EOSP | IEEE80211_TX_CTL_REQ_TX_STATUS; - drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false); + if (call_driver) + drv_allow_buffered_frames(local, sta, BIT(tid), 1, + reason, false); skb->dev = sdata->dev; @@ -1334,12 +1337,13 @@ ieee80211_sta_ps_deliver_response(struct sta_info *sta, /* This will evaluate to 1, 3, 5 or 7. */ tid = 7 - ((ffs(~ignored_acs) - 1) << 1); - ieee80211_send_null_response(sdata, sta, tid, reason); + ieee80211_send_null_response(sdata, sta, tid, reason, true); } else if (!driver_release_tids) { struct sk_buff_head pending; struct sk_buff *skb; int num = 0; u16 tids = 0; + bool need_null = false; skb_queue_head_init(&pending); @@ -1373,22 +1377,57 @@ ieee80211_sta_ps_deliver_response(struct sta_info *sta, ieee80211_is_qos_nullfunc(hdr->frame_control)) qoshdr = ieee80211_get_qos_ctl(hdr); - /* end service period after last frame */ - if (skb_queue_empty(&frames)) { - if (reason == IEEE80211_FRAME_RELEASE_UAPSD && - qoshdr) - *qoshdr |= IEEE80211_QOS_CTL_EOSP; + tids |= BIT(skb->priority); + __skb_queue_tail(&pending, skb); + + /* end service period after last frame or add one */ + if (!skb_queue_empty(&frames)) + continue; + + if (reason != IEEE80211_FRAME_RELEASE_UAPSD) { + /* for PS-Poll, there's only one frame */ info->flags |= IEEE80211_TX_STATUS_EOSP | IEEE80211_TX_CTL_REQ_TX_STATUS; + break; } - if (qoshdr) - tids |= BIT(*qoshdr & IEEE80211_QOS_CTL_TID_MASK); - else - tids |= BIT(0); + /* For uAPSD, things are a bit more complicated. If the + * last frame has a QoS header (i.e. is a QoS-data or + * QoS-nulldata frame) then just set the EOSP bit there + * and be done. + * If the frame doesn't have a QoS header (which means + * it should be a bufferable MMPDU) then we can't set + * the EOSP bit in the QoS header; add a QoS-nulldata + * frame to the list to send it after the MMPDU. + * + * Note that this code is only in the mac80211-release + * code path, we assume that the driver will not buffer + * anything but QoS-data frames, or if it does, will + * create the QoS-nulldata frame by itself if needed. + * + * Cf. 802.11-2012 10.2.1.10 (c). + */ + if (qoshdr) { + *qoshdr |= IEEE80211_QOS_CTL_EOSP; - __skb_queue_tail(&pending, skb); + info->flags |= IEEE80211_TX_STATUS_EOSP | + IEEE80211_TX_CTL_REQ_TX_STATUS; + } else { + /* The standard isn't completely clear on this + * as it says the more-data bit should be set + * if there are more BUs. The QoS-Null frame + * we're about to send isn't buffered yet, we + * only create it below, but let's pretend it + * was buffered just in case some clients only + * expect more-data=0 when eosp=1. + */ + hdr->frame_control |= + cpu_to_le16(IEEE80211_FCTL_MOREDATA); + need_null = true; + num++; + } + break; } drv_allow_buffered_frames(local, sta, tids, num, @@ -1396,6 +1435,11 @@ ieee80211_sta_ps_deliver_response(struct sta_info *sta, ieee80211_add_pending_skbs(local, &pending); + if (need_null) + ieee80211_send_null_response( + sdata, sta, find_highest_prio_tid(tids), + reason, false); + sta_info_recalc_tim(sta); } else { /* |