mirror of https://gitee.com/openkylin/linux.git
887 lines
24 KiB
C
887 lines
24 KiB
C
/*
|
|
* mac80211 TDLS handling code
|
|
*
|
|
* 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"
|
|
|
|
/* give usermode some time for retries in setting up the TDLS session */
|
|
#define TDLS_PEER_SETUP_TIMEOUT (15 * HZ)
|
|
|
|
void ieee80211_tdls_peer_del_work(struct work_struct *wk)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct ieee80211_local *local;
|
|
|
|
sdata = container_of(wk, struct ieee80211_sub_if_data,
|
|
u.mgd.tdls_peer_del_work.work);
|
|
local = sdata->local;
|
|
|
|
mutex_lock(&local->mtx);
|
|
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);
|
|
}
|
|
|
|
static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb)
|
|
{
|
|
u8 *pos = (void *)skb_put(skb, 7);
|
|
|
|
*pos++ = WLAN_EID_EXT_CAPABILITY;
|
|
*pos++ = 5; /* len */
|
|
*pos++ = 0x0;
|
|
*pos++ = 0x0;
|
|
*pos++ = 0x0;
|
|
*pos++ = 0x0;
|
|
*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
|
|
}
|
|
|
|
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;
|
|
|
|
if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
|
|
capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
|
|
if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
|
|
capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
|
|
|
|
return capab;
|
|
}
|
|
|
|
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, sdata->u.mgd.bssid, ETH_ALEN);
|
|
memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
|
|
memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
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:
|
|
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;
|
|
}
|
|
|
|
}
|
|
|
|
static int
|
|
ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_tdls_data *tf;
|
|
|
|
tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
|
|
|
|
memcpy(tf->da, peer, ETH_ALEN);
|
|
memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
|
|
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;
|
|
tf->action_code = WLAN_TDLS_SETUP_REQUEST;
|
|
|
|
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,
|
|
status_code));
|
|
break;
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
|
|
|
|
skb_put(skb, sizeof(tf->u.setup_resp));
|
|
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,
|
|
status_code));
|
|
break;
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
|
|
|
|
skb_put(skb, sizeof(tf->u.setup_cfm));
|
|
tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
|
|
tf->u.setup_cfm.dialog_token = dialog_token;
|
|
break;
|
|
case WLAN_TDLS_TEARDOWN:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_TEARDOWN;
|
|
|
|
skb_put(skb, sizeof(tf->u.teardown));
|
|
tf->u.teardown.reason_code = cpu_to_le16(status_code);
|
|
break;
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
|
|
|
|
skb_put(skb, sizeof(tf->u.discover_req));
|
|
tf->u.discover_req.dialog_token = dialog_token;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_mgmt *mgmt;
|
|
|
|
mgmt = (void *)skb_put(skb, 24);
|
|
memset(mgmt, 0, 24);
|
|
memcpy(mgmt->da, peer, ETH_ALEN);
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
|
|
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_ACTION);
|
|
|
|
switch (action_code) {
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
|
|
mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
|
|
mgmt->u.action.u.tdls_discover_resp.action_code =
|
|
WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
|
|
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,
|
|
status_code));
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ieee80211_tdls_prep_mgmt_packet(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 sk_buff *skb = NULL;
|
|
bool send_direct;
|
|
struct sta_info *sta;
|
|
int ret;
|
|
|
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
|
|
max(sizeof(struct ieee80211_mgmt),
|
|
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)
|
|
return -ENOMEM;
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
case WLAN_TDLS_TEARDOWN:
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer,
|
|
action_code, dialog_token,
|
|
status_code, skb);
|
|
send_direct = false;
|
|
break;
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code,
|
|
dialog_token, status_code,
|
|
skb);
|
|
send_direct = true;
|
|
break;
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, peer);
|
|
|
|
/* infer the initiator if we can, to support old userspace */
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
if (sta)
|
|
set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
|
|
/* fall-through */
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
initiator = true;
|
|
break;
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
/*
|
|
* In some testing scenarios, we send a request and response.
|
|
* Make the last packet sent take effect for the initiator
|
|
* value.
|
|
*/
|
|
if (sta)
|
|
clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
|
|
/* fall-through */
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
initiator = false;
|
|
break;
|
|
case WLAN_TDLS_TEARDOWN:
|
|
/* any value is ok */
|
|
break;
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
|
|
initiator = true;
|
|
|
|
rcu_read_unlock();
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
|
|
* we should default to AC_VI.
|
|
*/
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
skb_set_queue_mapping(skb, IEEE80211_AC_BK);
|
|
skb->priority = 2;
|
|
break;
|
|
default:
|
|
skb_set_queue_mapping(skb, IEEE80211_AC_VI);
|
|
skb->priority = 5;
|
|
break;
|
|
}
|
|
|
|
/* disable bottom halves when entering the Tx path */
|
|
local_bh_disable();
|
|
ret = ieee80211_subif_start_xmit(skb, dev);
|
|
local_bh_enable();
|
|
|
|
return ret;
|
|
|
|
fail:
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
ieee80211_tdls_mgmt_setup(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;
|
|
int ret;
|
|
|
|
mutex_lock(&local->mtx);
|
|
|
|
/* we don't support concurrent TDLS peer setups */
|
|
if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
|
|
!ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
|
|
ret = -EBUSY;
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* make sure we have a STA representing the peer so we drop or buffer
|
|
* non-TDLS-setup frames to the peer. We can't send other packets
|
|
* during setup through the AP path.
|
|
* Allow error packets to be sent - sometimes we don't even add a STA
|
|
* before failing the setup.
|
|
*/
|
|
if (status_code == 0) {
|
|
rcu_read_lock();
|
|
if (!sta_info_get(sdata, peer)) {
|
|
rcu_read_unlock();
|
|
ret = -ENOLINK;
|
|
goto exit;
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
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)
|
|
goto exit;
|
|
|
|
memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);
|
|
ieee80211_queue_delayed_work(&sdata->local->hw,
|
|
&sdata->u.mgd.tdls_peer_del_work,
|
|
TDLS_PEER_SETUP_TIMEOUT);
|
|
|
|
exit:
|
|
mutex_unlock(&local->mtx);
|
|
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,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
int ret;
|
|
|
|
if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
|
|
return -ENOTSUPP;
|
|
|
|
/* make sure we are in managed mode, and associated */
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION ||
|
|
!sdata->u.mgd.associated)
|
|
return -EINVAL;
|
|
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code,
|
|
dialog_token, status_code,
|
|
peer_capability, initiator,
|
|
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_DISCOVERY_REQUEST:
|
|
/*
|
|
* Protect the discovery so we can hear the TDLS discovery
|
|
* response frame. It is transmitted directly and not buffered
|
|
* by the AP.
|
|
*/
|
|
drv_mgd_protect_tdls_discover(sdata->local, sdata);
|
|
/* fall-through */
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
/* no special handling */
|
|
ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
|
|
action_code,
|
|
dialog_token,
|
|
status_code,
|
|
peer_capability,
|
|
initiator, extra_ies,
|
|
extra_ies_len);
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n",
|
|
action_code, peer, ret);
|
|
return ret;
|
|
}
|
|
|
|
int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, enum nl80211_tdls_operation oper)
|
|
{
|
|
struct sta_info *sta;
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
int ret;
|
|
|
|
if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
|
|
return -ENOTSUPP;
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
return -EINVAL;
|
|
|
|
switch (oper) {
|
|
case NL80211_TDLS_ENABLE_LINK:
|
|
case NL80211_TDLS_DISABLE_LINK:
|
|
break;
|
|
case NL80211_TDLS_TEARDOWN:
|
|
case NL80211_TDLS_SETUP:
|
|
case NL80211_TDLS_DISCOVERY_REQ:
|
|
/* We don't support in-driver setup/teardown/discovery */
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
mutex_lock(&local->mtx);
|
|
tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer);
|
|
|
|
switch (oper) {
|
|
case NL80211_TDLS_ENABLE_LINK:
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, peer);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
ret = -ENOLINK;
|
|
break;
|
|
}
|
|
|
|
set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
|
|
rcu_read_unlock();
|
|
|
|
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);
|
|
|
|
ret = sta_info_destroy_addr(sdata, peer);
|
|
break;
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
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);
|
|
return ret;
|
|
}
|
|
|
|
void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer,
|
|
enum nl80211_tdls_operation oper,
|
|
u16 reason_code, gfp_t gfp)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) {
|
|
sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n",
|
|
oper);
|
|
return;
|
|
}
|
|
|
|
cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_tdls_oper_request);
|