diff options
Diffstat (limited to 'net/mac80211/tdls.c')
| -rw-r--r-- | net/mac80211/tdls.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c index 92d203a3be07..0ba7e4c029c8 100644 --- a/net/mac80211/tdls.c +++ b/net/mac80211/tdls.c @@ -331,6 +331,8 @@ ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, goto exit; } + ieee80211_flush_queues(local, sdata); + ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, dialog_token, status_code, peer_capability, initiator, @@ -348,6 +350,52 @@ exit: return ret; } +static int +ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, + const u8 *peer, u8 action_code, u8 dialog_token, + u16 status_code, u32 peer_capability, + bool initiator, const u8 *extra_ies, + size_t extra_ies_len) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = sdata->local; + struct sta_info *sta; + int ret; + + /* + * No packets can be transmitted to the peer via the AP during setup - + * the STA is set as a TDLS peer, but is not authorized. + * During teardown, we prevent direct transmissions by stopping the + * queues and flushing all direct packets. + */ + ieee80211_stop_vif_queues(local, sdata, + IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); + ieee80211_flush_queues(local, sdata); + + ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, + dialog_token, status_code, + peer_capability, initiator, + extra_ies, extra_ies_len); + if (ret < 0) + sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", + ret); + + /* + * Remove the STA AUTH flag to force further traffic through the AP. If + * the STA was unreachable, it was already removed. + */ + rcu_read_lock(); + sta = sta_info_get(sdata, peer); + if (sta) + clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); + rcu_read_unlock(); + + ieee80211_wake_vif_queues(local, sdata, + IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); + + return 0; +} + int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, u8 action_code, u8 dialog_token, u16 status_code, u32 peer_capability, @@ -374,6 +422,12 @@ int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, extra_ies, extra_ies_len); break; case WLAN_TDLS_TEARDOWN: + ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, + action_code, dialog_token, + status_code, + peer_capability, initiator, + extra_ies, extra_ies_len); + break; case WLAN_TDLS_SETUP_CONFIRM: case WLAN_TDLS_DISCOVERY_REQUEST: case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: @@ -442,6 +496,9 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, ret = 0; break; case NL80211_TDLS_DISABLE_LINK: + /* flush a potentially queued teardown packet */ + ieee80211_flush_queues(local, sdata); + ret = sta_info_destroy_addr(sdata, peer); break; default: |