*
* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2014, Intel Corporation
+ * Copyright 2014 Intel Mobile Communications GmbH
*
* This file is GPLv2 as found in COPYING.
*/
#include <linux/ieee80211.h>
+#include <linux/log2.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
struct ieee80211_local *local;
sdata = container_of(wk, struct ieee80211_sub_if_data,
- tdls_peer_del_work.work);
+ u.mgd.tdls_peer_del_work.work);
local = sdata->local;
mutex_lock(&local->mtx);
- if (!is_zero_ether_addr(sdata->tdls_peer)) {
- tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->tdls_peer);
- sta_info_destroy_addr(sdata, sdata->tdls_peer);
- eth_zero_addr(sdata->tdls_peer);
+ if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) {
+ tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer);
+ sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer);
+ eth_zero_addr(sdata->u.mgd.tdls_peer);
}
mutex_unlock(&local->mtx);
}
*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
}
-static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata)
+static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata,
+ u16 status_code)
{
struct ieee80211_local *local = sdata->local;
u16 capab;
+ /* The capability will be 0 when sending a failure code */
+ if (status_code != 0)
+ return 0;
+
capab = 0;
if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ)
return capab;
return capab;
}
-static void ieee80211_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr,
- const u8 *peer, const u8 *bssid)
+static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb, const u8 *peer,
+ bool initiator)
{
struct ieee80211_tdls_lnkie *lnkid;
+ const u8 *init_addr, *rsp_addr;
+
+ if (initiator) {
+ init_addr = sdata->vif.addr;
+ rsp_addr = peer;
+ } else {
+ init_addr = peer;
+ rsp_addr = sdata->vif.addr;
+ }
lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
lnkid->ie_type = WLAN_EID_LINK_ID;
lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
- memcpy(lnkid->bssid, bssid, ETH_ALEN);
- memcpy(lnkid->init_sta, src_addr, ETH_ALEN);
- memcpy(lnkid->resp_sta, peer, ETH_ALEN);
+ memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+ memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
+ memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
}
-static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
+/* translate numbering in the WMM parameter IE to the mac80211 notation */
+static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac)
+{
+ switch (ac) {
+ default:
+ WARN_ON_ONCE(1);
+ case 0:
+ return IEEE80211_AC_BE;
+ case 1:
+ return IEEE80211_AC_BK;
+ case 2:
+ return IEEE80211_AC_VI;
+ case 3:
+ return IEEE80211_AC_VO;
+ }
+}
+
+static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci)
+{
+ u8 ret;
+
+ ret = aifsn & 0x0f;
+ if (acm)
+ ret |= 0x10;
+ ret |= (aci << 5) & 0x60;
+ return ret;
+}
+
+static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max)
+{
+ return ((ilog2(cw_min + 1) << 0x0) & 0x0f) |
+ ((ilog2(cw_max + 1) << 0x4) & 0xf0);
+}
+
+static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb)
+{
+ struct ieee80211_wmm_param_ie *wmm;
+ struct ieee80211_tx_queue_params *txq;
+ int i;
+
+ wmm = (void *)skb_put(skb, sizeof(*wmm));
+ memset(wmm, 0, sizeof(*wmm));
+
+ wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
+ wmm->len = sizeof(*wmm) - 2;
+
+ wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
+ wmm->oui[1] = 0x50;
+ wmm->oui[2] = 0xf2;
+ wmm->oui_type = 2; /* WME */
+ wmm->oui_subtype = 1; /* WME param */
+ wmm->version = 1; /* WME ver */
+ wmm->qos_info = 0; /* U-APSD not in use */
+
+ /*
+ * Use the EDCA parameters defined for the BSS, or default if the AP
+ * doesn't support it, as mandated by 802.11-2012 section 10.22.4
+ */
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)];
+ wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs,
+ txq->acm, i);
+ wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max);
+ wmm->ac[i].txop_limit = cpu_to_le16(txq->txop);
+ }
+}
+
+static void
+ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, const u8 *peer,
u8 action_code, bool initiator,
const u8 *extra_ies, size_t extra_ies_len)
{
- const u8 *init_addr, *rsp_addr;
enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_sta_ht_cap ht_cap;
+ struct sta_info *sta = NULL;
+ size_t offset = 0, noffset;
+ u8 *pos;
+ rcu_read_lock();
+
+ /* we should have the peer STA if we're already responding */
+ if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
+ sta = sta_info_get(sdata, peer);
+ if (WARN_ON_ONCE(!sta)) {
+ rcu_read_unlock();
+ return;
+ }
+ }
+
+ ieee80211_add_srates_ie(sdata, skb, false, band);
+ ieee80211_add_ext_srates_ie(sdata, skb, false, band);
+
+ /* add any custom IEs that go before Extended Capabilities */
+ if (extra_ies_len) {
+ static const u8 before_ext_cap[] = {
+ WLAN_EID_SUPP_RATES,
+ WLAN_EID_COUNTRY,
+ WLAN_EID_EXT_SUPP_RATES,
+ WLAN_EID_SUPPORTED_CHANNELS,
+ WLAN_EID_RSN,
+ };
+ noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
+ before_ext_cap,
+ ARRAY_SIZE(before_ext_cap),
+ offset);
+ pos = skb_put(skb, noffset - offset);
+ memcpy(pos, extra_ies + offset, noffset - offset);
+ offset = noffset;
+ }
+
+ ieee80211_tdls_add_ext_capab(skb);
+
+ /* add the QoS element if we support it */
+ if (local->hw.queues >= IEEE80211_NUM_ACS &&
+ action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
+ ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */
+
+ /* add any custom IEs that go before HT capabilities */
+ if (extra_ies_len) {
+ static const u8 before_ht_cap[] = {
+ WLAN_EID_SUPP_RATES,
+ WLAN_EID_COUNTRY,
+ WLAN_EID_EXT_SUPP_RATES,
+ WLAN_EID_SUPPORTED_CHANNELS,
+ WLAN_EID_RSN,
+ WLAN_EID_EXT_CAPABILITY,
+ WLAN_EID_QOS_CAPA,
+ WLAN_EID_FAST_BSS_TRANSITION,
+ WLAN_EID_TIMEOUT_INTERVAL,
+ WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+ };
+ noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
+ before_ht_cap,
+ ARRAY_SIZE(before_ht_cap),
+ offset);
+ pos = skb_put(skb, noffset - offset);
+ memcpy(pos, extra_ies + offset, noffset - offset);
+ offset = noffset;
+ }
+
+ /*
+ * with TDLS we can switch channels, and HT-caps are not necessarily
+ * the same on all bands. The specification limits the setup to a
+ * single HT-cap, so use the current band for now.
+ */
+ sband = local->hw.wiphy->bands[band];
+ memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
+ if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
+ action_code == WLAN_TDLS_SETUP_RESPONSE) &&
+ ht_cap.ht_supported && (!sta || sta->sta.ht_cap.ht_supported)) {
+ if (action_code == WLAN_TDLS_SETUP_REQUEST) {
+ ieee80211_apply_htcap_overrides(sdata, &ht_cap);
+
+ /* disable SMPS in TDLS initiator */
+ ht_cap.cap |= (WLAN_HT_CAP_SM_PS_DISABLED
+ << IEEE80211_HT_CAP_SM_PS_SHIFT);
+ } else {
+ /* disable SMPS in TDLS responder */
+ sta->sta.ht_cap.cap |=
+ (WLAN_HT_CAP_SM_PS_DISABLED
+ << IEEE80211_HT_CAP_SM_PS_SHIFT);
+
+ /* the peer caps are already intersected with our own */
+ memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap));
+ }
+
+ pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
+ ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
+ }
+
+ rcu_read_unlock();
+
+ /* add any remaining IEs */
+ if (extra_ies_len) {
+ noffset = extra_ies_len;
+ pos = skb_put(skb, noffset - offset);
+ memcpy(pos, extra_ies + offset, noffset - offset);
+ }
+
+ ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+}
+
+static void
+ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb, const u8 *peer,
+ bool initiator, const u8 *extra_ies,
+ size_t extra_ies_len)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+ size_t offset = 0, noffset;
+ struct sta_info *sta, *ap_sta;
+ u8 *pos;
+
+ rcu_read_lock();
+
+ sta = sta_info_get(sdata, peer);
+ ap_sta = sta_info_get(sdata, ifmgd->bssid);
+ if (WARN_ON_ONCE(!sta || !ap_sta)) {
+ rcu_read_unlock();
+ return;
+ }
+
+ /* add any custom IEs that go before the QoS IE */
+ if (extra_ies_len) {
+ static const u8 before_qos[] = {
+ WLAN_EID_RSN,
+ };
+ noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
+ before_qos,
+ ARRAY_SIZE(before_qos),
+ offset);
+ pos = skb_put(skb, noffset - offset);
+ memcpy(pos, extra_ies + offset, noffset - offset);
+ offset = noffset;
+ }
+
+ /* add the QoS param IE if both the peer and we support it */
+ if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
+ ieee80211_tdls_add_wmm_param_ie(sdata, skb);
+
+ /* add any custom IEs that go before HT operation */
+ if (extra_ies_len) {
+ static const u8 before_ht_op[] = {
+ WLAN_EID_RSN,
+ WLAN_EID_QOS_CAPA,
+ WLAN_EID_FAST_BSS_TRANSITION,
+ WLAN_EID_TIMEOUT_INTERVAL,
+ };
+ noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
+ before_ht_op,
+ ARRAY_SIZE(before_ht_op),
+ offset);
+ pos = skb_put(skb, noffset - offset);
+ memcpy(pos, extra_ies + offset, noffset - offset);
+ offset = noffset;
+ }
+
+ /* if HT support is only added in TDLS, we need an HT-operation IE */
+ if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) {
+ struct ieee80211_chanctx_conf *chanctx_conf =
+ rcu_dereference(sdata->vif.chanctx_conf);
+ if (!WARN_ON(!chanctx_conf)) {
+ pos = skb_put(skb, 2 +
+ sizeof(struct ieee80211_ht_operation));
+ /* send an empty HT operation IE */
+ ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap,
+ &chanctx_conf->def, 0);
+ }
+ }
+
+ rcu_read_unlock();
+
+ /* add any remaining IEs */
+ if (extra_ies_len) {
+ noffset = extra_ies_len;
+ pos = skb_put(skb, noffset - offset);
+ memcpy(pos, extra_ies + offset, noffset - offset);
+ }
+
+ ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+}
+
+static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb, const u8 *peer,
+ u8 action_code, u16 status_code,
+ bool initiator, const u8 *extra_ies,
+ size_t extra_ies_len)
+{
switch (action_code) {
case WLAN_TDLS_SETUP_REQUEST:
case WLAN_TDLS_SETUP_RESPONSE:
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
- ieee80211_add_srates_ie(sdata, skb, false, band);
- ieee80211_add_ext_srates_ie(sdata, skb, false, band);
- ieee80211_tdls_add_ext_capab(skb);
+ if (status_code == 0)
+ ieee80211_tdls_add_setup_start_ies(sdata, skb, peer,
+ action_code,
+ initiator,
+ extra_ies,
+ extra_ies_len);
break;
case WLAN_TDLS_SETUP_CONFIRM:
+ if (status_code == 0)
+ ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer,
+ initiator, extra_ies,
+ extra_ies_len);
+ break;
case WLAN_TDLS_TEARDOWN:
case WLAN_TDLS_DISCOVERY_REQUEST:
+ if (extra_ies_len)
+ memcpy(skb_put(skb, extra_ies_len), extra_ies,
+ extra_ies_len);
+ if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
+ ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
break;
}
- if (initiator) {
- init_addr = sdata->vif.addr;
- rsp_addr = peer;
- } else {
- init_addr = peer;
- rsp_addr = sdata->vif.addr;
- }
-
- if (extra_ies_len)
- memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
-
- ieee80211_tdls_add_link_ie(skb, init_addr, rsp_addr,
- sdata->u.mgd.bssid);
}
static int
tf->ether_type = cpu_to_be16(ETH_P_TDLS);
tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
+ /* network header is after the ethernet header */
+ skb_set_network_header(skb, ETH_HLEN);
+
switch (action_code) {
case WLAN_TDLS_SETUP_REQUEST:
tf->category = WLAN_CATEGORY_TDLS;
skb_put(skb, sizeof(tf->u.setup_req));
tf->u.setup_req.dialog_token = dialog_token;
tf->u.setup_req.capability =
- cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
+ cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
+ status_code));
break;
case WLAN_TDLS_SETUP_RESPONSE:
tf->category = WLAN_CATEGORY_TDLS;
tf->u.setup_resp.status_code = cpu_to_le16(status_code);
tf->u.setup_resp.dialog_token = dialog_token;
tf->u.setup_resp.capability =
- cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
+ cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
+ status_code));
break;
case WLAN_TDLS_SETUP_CONFIRM:
tf->category = WLAN_CATEGORY_TDLS;
mgmt->u.action.u.tdls_discover_resp.dialog_token =
dialog_token;
mgmt->u.action.u.tdls_discover_resp.capability =
- cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
+ cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
+ status_code));
break;
default:
return -EINVAL;
sizeof(struct ieee80211_tdls_data)) +
50 + /* supported rates */
7 + /* ext capab */
+ 26 + /* max(WMM-info, WMM-param) */
+ 2 + max(sizeof(struct ieee80211_ht_cap),
+ sizeof(struct ieee80211_ht_operation)) +
extra_ies_len +
sizeof(struct ieee80211_tdls_lnkie));
if (!skb)
if (ret < 0)
goto fail;
- ieee80211_tdls_add_ies(sdata, skb, peer, action_code, initiator,
- extra_ies, extra_ies_len);
+ ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code,
+ initiator, extra_ies, extra_ies_len);
if (send_direct) {
ieee80211_tx_skb(sdata, skb);
return 0;
mutex_lock(&local->mtx);
/* we don't support concurrent TDLS peer setups */
- if (!is_zero_ether_addr(sdata->tdls_peer) &&
- !ether_addr_equal(sdata->tdls_peer, peer)) {
+ if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
+ !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
ret = -EBUSY;
goto exit;
}
if (ret < 0)
goto exit;
- memcpy(sdata->tdls_peer, peer, ETH_ALEN);
+ memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);
ieee80211_queue_delayed_work(&sdata->local->hw,
- &sdata->tdls_peer_del_work,
+ &sdata->u.mgd.tdls_peer_del_work,
TDLS_PEER_SETUP_TIMEOUT);
exit:
set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
rcu_read_unlock();
- WARN_ON_ONCE(is_zero_ether_addr(sdata->tdls_peer) ||
- !ether_addr_equal(sdata->tdls_peer, peer));
+ WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) ||
+ !ether_addr_equal(sdata->u.mgd.tdls_peer, peer));
ret = 0;
break;
case NL80211_TDLS_DISABLE_LINK:
+ /*
+ * The teardown message in ieee80211_tdls_mgmt_teardown() was
+ * created while the queues were stopped, so it might still be
+ * pending. Before flushing the queues we need to be sure the
+ * message is handled by the tasklet handling pending messages,
+ * otherwise we might start destroying the station before
+ * sending the teardown packet.
+ * Note that this only forces the tasklet to flush pendings -
+ * not to stop the tasklet from rescheduling itself.
+ */
+ tasklet_kill(&local->tx_pending_tasklet);
/* flush a potentially queued teardown packet */
ieee80211_flush_queues(local, sdata);
break;
}
- if (ret == 0 && ether_addr_equal(sdata->tdls_peer, peer)) {
- cancel_delayed_work(&sdata->tdls_peer_del_work);
- eth_zero_addr(sdata->tdls_peer);
+ if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
+ cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work);
+ eth_zero_addr(sdata->u.mgd.tdls_peer);
}
mutex_unlock(&local->mtx);