提交 9deba04d 编写于 作者: A Arik Nemtsov 提交者: Johannes Berg

mac80211: clarify TDLS Tx handling

Rename the flags used in the Tx path and add an explanation for the
reasons to drop, send directly or through the AP.
Signed-off-by: NArik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
上级 a46992b4
......@@ -1811,7 +1811,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
int nh_pos, h_pos;
struct sta_info *sta = NULL;
bool wme_sta = false, authorized = false, tdls_auth = false;
bool tdls_direct = false;
bool tdls_peer = false, tdls_setup_frame = false;
bool multicast;
u32 info_flags = 0;
u16 info_id = 0;
......@@ -1953,34 +1953,35 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
#endif
case NL80211_IFTYPE_STATION:
if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
bool tdls_peer = false;
sta = sta_info_get(sdata, skb->data);
if (sta) {
authorized = test_sta_flag(sta,
WLAN_STA_AUTHORIZED);
wme_sta = test_sta_flag(sta, WLAN_STA_WME);
tdls_peer = test_sta_flag(sta,
WLAN_STA_TDLS_PEER);
WLAN_STA_TDLS_PEER);
tdls_auth = test_sta_flag(sta,
WLAN_STA_TDLS_PEER_AUTH);
}
/*
* If the TDLS link is enabled, send everything
* directly. Otherwise, allow TDLS setup frames
* to be transmitted indirectly.
*/
tdls_direct = tdls_peer && (tdls_auth ||
!(ethertype == ETH_P_TDLS && skb->len > 14 &&
skb->data[14] == WLAN_TDLS_SNAP_RFTYPE));
if (tdls_peer)
tdls_setup_frame =
ethertype == ETH_P_TDLS &&
skb->len > 14 &&
skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
}
if (tdls_direct) {
/* link during setup - throw out frames to peer */
if (!tdls_auth)
goto fail_rcu;
/*
* TDLS link during setup - throw out frames to peer. We allow
* TDLS-setup frames to unauthorized peers for the special case
* of a link teardown after a TDLS sta is removed due to being
* unreachable.
*/
if (tdls_peer && !tdls_auth && !tdls_setup_frame)
goto fail_rcu;
/* send direct packets to authorized TDLS peers */
if (tdls_peer && tdls_auth) {
/* DA SA BSSID */
memcpy(hdr.addr1, skb->data, ETH_ALEN);
memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
......
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