diff options
Diffstat (limited to 'net/mac80211/agg-rx.c')
| -rw-r--r-- | net/mac80211/agg-rx.c | 94 |
1 files changed, 58 insertions, 36 deletions
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index fe7eab4b681b..f3fbe5a4395e 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -170,28 +170,63 @@ static void sta_rx_agg_reorder_timer_expired(struct timer_list *t) rcu_read_unlock(); } -static void ieee80211_add_addbaext(struct ieee80211_sub_if_data *sdata, - struct sk_buff *skb, - const struct ieee80211_addba_ext_ie *req, - u16 buf_size) +void ieee80211_add_addbaext(struct sk_buff *skb, + const u8 req_addba_ext_data, + u16 buf_size) { - struct ieee80211_addba_ext_ie *resp; + struct ieee80211_addba_ext_ie *addba_ext; u8 *pos; pos = skb_put_zero(skb, 2 + sizeof(struct ieee80211_addba_ext_ie)); *pos++ = WLAN_EID_ADDBA_EXT; *pos++ = sizeof(struct ieee80211_addba_ext_ie); - resp = (struct ieee80211_addba_ext_ie *)pos; - resp->data = req->data & IEEE80211_ADDBA_EXT_NO_FRAG; + addba_ext = (struct ieee80211_addba_ext_ie *)pos; - resp->data |= u8_encode_bits(buf_size >> IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT, - IEEE80211_ADDBA_EXT_BUF_SIZE_MASK); + addba_ext->data = IEEE80211_ADDBA_EXT_NO_FRAG; + if (req_addba_ext_data) + addba_ext->data &= req_addba_ext_data; + + addba_ext->data |= + u8_encode_bits(buf_size >> IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT, + IEEE80211_ADDBA_EXT_BUF_SIZE_MASK); +} + +u8 ieee80211_retrieve_addba_ext_data(struct sta_info *sta, + const void *elem_data, ssize_t elem_len, + u16 *buf_size) +{ + struct ieee802_11_elems *elems; + u8 buf_size_1k, data = 0; + + if (!sta->sta.deflink.he_cap.has_he) + return 0; + + if (elem_len <= 0) + return 0; + + elems = ieee802_11_parse_elems(elem_data, elem_len, true, NULL); + + if (elems && !elems->parse_error && elems->addba_ext_ie) { + data = elems->addba_ext_ie->data; + + if (!sta->sta.deflink.eht_cap.has_eht || !buf_size) + goto free; + + buf_size_1k = u8_get_bits(elems->addba_ext_ie->data, + IEEE80211_ADDBA_EXT_BUF_SIZE_MASK); + *buf_size |= (u16)buf_size_1k << + IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT; + } +free: + kfree(elems); + + return data; } static void ieee80211_send_addba_resp(struct sta_info *sta, u8 *da, u16 tid, u8 dialog_token, u16 status, u16 policy, u16 buf_size, u16 timeout, - const struct ieee80211_addba_ext_ie *addbaext) + const u8 req_addba_ext_data) { struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; @@ -223,8 +258,8 @@ static void ieee80211_send_addba_resp(struct sta_info *sta, u8 *da, u16 tid, mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout); mgmt->u.action.u.addba_resp.status = cpu_to_le16(status); - if (sta->sta.deflink.he_cap.has_he && addbaext) - ieee80211_add_addbaext(sdata, skb, addbaext, buf_size); + if (sta->sta.deflink.he_cap.has_he) + ieee80211_add_addbaext(skb, req_addba_ext_data, buf_size); ieee80211_tx_skb(sdata, skb); } @@ -233,7 +268,7 @@ void __ieee80211_start_rx_ba_session(struct sta_info *sta, u8 dialog_token, u16 timeout, u16 start_seq_num, u16 ba_policy, u16 tid, u16 buf_size, bool tx, bool auto_seq, - const struct ieee80211_addba_ext_ie *addbaext) + const u8 addba_ext_data) { struct ieee80211_local *local = sta->sdata->local; struct tid_ampdu_rx *tid_agg_rx; @@ -419,7 +454,7 @@ end: if (tx) ieee80211_send_addba_resp(sta, sta->sta.addr, tid, dialog_token, status, 1, buf_size, - timeout, addbaext); + timeout, addba_ext_data); } void ieee80211_process_addba_request(struct ieee80211_local *local, @@ -428,9 +463,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, size_t len) { u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num; - struct ieee802_11_elems *elems = NULL; - u8 dialog_token; - int ies_len; + u8 dialog_token, addba_ext_data; /* extract session parameters from addba request frame */ dialog_token = mgmt->u.action.u.addba_req.dialog_token; @@ -443,28 +476,17 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; - ies_len = len - offsetof(struct ieee80211_mgmt, - u.action.u.addba_req.variable); - if (ies_len) { - elems = ieee802_11_parse_elems(mgmt->u.action.u.addba_req.variable, - ies_len, true, NULL); - if (!elems || elems->parse_error) - goto free; - } - - if (sta->sta.deflink.eht_cap.has_eht && elems && elems->addba_ext_ie) { - u8 buf_size_1k = u8_get_bits(elems->addba_ext_ie->data, - IEEE80211_ADDBA_EXT_BUF_SIZE_MASK); - - buf_size |= buf_size_1k << IEEE80211_ADDBA_EXT_BUF_SIZE_SHIFT; - } + addba_ext_data = + ieee80211_retrieve_addba_ext_data(sta, + mgmt->u.action.u.addba_req.variable, + len - + offsetof(typeof(*mgmt), + u.action.u.addba_req.variable), + &buf_size); __ieee80211_start_rx_ba_session(sta, dialog_token, timeout, start_seq_num, ba_policy, tid, - buf_size, true, false, - elems ? elems->addba_ext_ie : NULL); -free: - kfree(elems); + buf_size, true, false, addba_ext_data); } void ieee80211_manage_rx_ba_offl(struct ieee80211_vif *vif, |