diff options
| -rw-r--r-- | net/mac80211/mesh_plink.c | 41 |
1 files changed, 35 insertions, 6 deletions
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index 3323413acb77..e12be2e4e8df 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -422,20 +422,54 @@ out: spin_unlock_bh(&sta->mesh->plink_lock); } +static int mesh_allocate_aid(struct ieee80211_sub_if_data *sdata) +{ + struct sta_info *sta; + unsigned long *aid_map; + int aid; + + aid_map = kcalloc(BITS_TO_LONGS(IEEE80211_MAX_AID + 1), + sizeof(*aid_map), GFP_KERNEL); + if (!aid_map) + return -ENOMEM; + + /* reserve aid 0 for mcast indication */ + __set_bit(0, aid_map); + + rcu_read_lock(); + list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) + __set_bit(sta->sta.aid, aid_map); + rcu_read_unlock(); + + aid = find_first_zero_bit(aid_map, IEEE80211_MAX_AID + 1); + kfree(aid_map); + + if (aid > IEEE80211_MAX_AID) + return -ENOBUFS; + + return aid; +} + static struct sta_info * __mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr) { struct sta_info *sta; + int aid; if (sdata->local->num_sta >= MESH_MAX_PLINKS) return NULL; + aid = mesh_allocate_aid(sdata); + if (aid < 0) + return NULL; + sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL); if (!sta) return NULL; sta->mesh->plink_state = NL80211_PLINK_LISTEN; sta->sta.wme = true; + sta->sta.aid = aid; sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); @@ -659,8 +693,6 @@ static u16 mesh_get_new_llid(struct ieee80211_sub_if_data *sdata) do { get_random_bytes(&llid, sizeof(llid)); - /* for mesh PS we still only have the AID range for TIM bits */ - llid = (llid % IEEE80211_MAX_AID) + 1; } while (llid_in_use(sdata, llid)); return llid; @@ -1069,7 +1101,6 @@ mesh_process_plink_frame(struct ieee80211_sub_if_data *sdata, goto unlock_rcu; } sta->mesh->plid = plid; - sta->sta.aid = plid; } else if (!sta && event == OPN_RJCT) { mesh_plink_frame_tx(sdata, NULL, WLAN_SP_MESH_PEERING_CLOSE, mgmt->sa, 0, plid, @@ -1082,10 +1113,8 @@ mesh_process_plink_frame(struct ieee80211_sub_if_data *sdata, if (event == CNF_ACPT) { /* 802.11-2012 13.3.7.2 - update plid on CNF if not set */ - if (!sta->mesh->plid) { + if (!sta->mesh->plid) sta->mesh->plid = plid; - sta->sta.aid = sta->mesh->plid; - } sta->mesh->aid = get_unaligned_le16(PLINK_CNF_AID(mgmt)); } |