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linux/drivers/net/wireless/mwifiex/tdls.c

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/* Marvell Wireless LAN device driver: TDLS handling
*
* Copyright (C) 2014, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available on the worldwide web at
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include "main.h"
#include "wmm.h"
#include "11n.h"
#include "11n_rxreorder.h"
#include "11ac.h"
#define TDLS_REQ_FIX_LEN 6
#define TDLS_RESP_FIX_LEN 8
#define TDLS_CONFIRM_FIX_LEN 6
#define MWIFIEX_TDLS_WMM_INFO_SIZE 7
static void mwifiex_restore_tdls_packets(struct mwifiex_private *priv,
const u8 *mac, u8 status)
{
struct mwifiex_ra_list_tbl *ra_list;
struct list_head *tid_list;
struct sk_buff *skb, *tmp;
struct mwifiex_txinfo *tx_info;
unsigned long flags;
u32 tid;
u8 tid_down;
mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) {
if (!ether_addr_equal(mac, skb->data))
continue;
__skb_unlink(skb, &priv->tdls_txq);
tx_info = MWIFIEX_SKB_TXCB(skb);
tid = skb->priority;
tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
if (status == TDLS_SETUP_COMPLETE) {
ra_list = mwifiex_wmm_get_queue_raptr(priv, tid, mac);
ra_list->tdls_link = true;
tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
} else {
tid_list = &priv->wmm.tid_tbl_ptr[tid_down].ra_list;
if (!list_empty(tid_list))
ra_list = list_first_entry(tid_list,
struct mwifiex_ra_list_tbl, list);
else
ra_list = NULL;
tx_info->flags &= ~MWIFIEX_BUF_FLAG_TDLS_PKT;
}
if (!ra_list) {
mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
continue;
}
skb_queue_tail(&ra_list->skb_head, skb);
ra_list->ba_pkt_count++;
ra_list->total_pkt_count++;
if (atomic_read(&priv->wmm.highest_queued_prio) <
tos_to_tid_inv[tid_down])
atomic_set(&priv->wmm.highest_queued_prio,
tos_to_tid_inv[tid_down]);
atomic_inc(&priv->wmm.tx_pkts_queued);
}
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
return;
}
static void mwifiex_hold_tdls_packets(struct mwifiex_private *priv,
const u8 *mac)
{
struct mwifiex_ra_list_tbl *ra_list;
struct list_head *ra_list_head;
struct sk_buff *skb, *tmp;
unsigned long flags;
int i;
mwifiex_dbg(priv->adapter, DATA, "%s: %pM\n", __func__, mac);
spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
for (i = 0; i < MAX_NUM_TID; i++) {
if (!list_empty(&priv->wmm.tid_tbl_ptr[i].ra_list)) {
ra_list_head = &priv->wmm.tid_tbl_ptr[i].ra_list;
list_for_each_entry(ra_list, ra_list_head, list) {
skb_queue_walk_safe(&ra_list->skb_head, skb,
tmp) {
if (!ether_addr_equal(mac, skb->data))
continue;
__skb_unlink(skb, &ra_list->skb_head);
atomic_dec(&priv->wmm.tx_pkts_queued);
ra_list->total_pkt_count--;
skb_queue_tail(&priv->tdls_txq, skb);
}
}
}
}
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
return;
}
/* This function appends rate TLV to scan config command. */
static int
mwifiex_tdls_append_rates_ie(struct mwifiex_private *priv,
struct sk_buff *skb)
{
u8 rates[MWIFIEX_SUPPORTED_RATES], *pos;
u16 rates_size, supp_rates_size, ext_rates_size;
memset(rates, 0, sizeof(rates));
rates_size = mwifiex_get_supported_rates(priv, rates);
supp_rates_size = min_t(u16, rates_size, MWIFIEX_TDLS_SUPPORTED_RATES);
if (skb_tailroom(skb) < rates_size + 4) {
mwifiex_dbg(priv->adapter, ERROR,
"Insuffient space while adding rates\n");
return -ENOMEM;
}
pos = skb_put(skb, supp_rates_size + 2);
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = supp_rates_size;
memcpy(pos, rates, supp_rates_size);
if (rates_size > MWIFIEX_TDLS_SUPPORTED_RATES) {
ext_rates_size = rates_size - MWIFIEX_TDLS_SUPPORTED_RATES;
pos = skb_put(skb, ext_rates_size + 2);
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = ext_rates_size;
memcpy(pos, rates + MWIFIEX_TDLS_SUPPORTED_RATES,
ext_rates_size);
}
return 0;
}
static void mwifiex_tdls_add_aid(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct ieee_types_assoc_rsp *assoc_rsp;
u8 *pos;
assoc_rsp = (struct ieee_types_assoc_rsp *)&priv->assoc_rsp_buf;
pos = (void *)skb_put(skb, 4);
*pos++ = WLAN_EID_AID;
*pos++ = 2;
*pos++ = le16_to_cpu(assoc_rsp->a_id);
return;
}
static int mwifiex_tdls_add_vht_capab(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct ieee80211_vht_cap vht_cap;
u8 *pos;
pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
*pos++ = WLAN_EID_VHT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_vht_cap);
memset(&vht_cap, 0, sizeof(struct ieee80211_vht_cap));
mwifiex_fill_vht_cap_tlv(priv, &vht_cap, priv->curr_bss_params.band);
memcpy(pos, &vht_cap, sizeof(vht_cap));
return 0;
}
static int
mwifiex_tdls_add_ht_oper(struct mwifiex_private *priv, const u8 *mac,
u8 vht_enabled, struct sk_buff *skb)
{
struct ieee80211_ht_operation *ht_oper;
struct mwifiex_sta_node *sta_ptr;
struct mwifiex_bssdescriptor *bss_desc =
&priv->curr_bss_params.bss_descriptor;
u8 *pos;
sta_ptr = mwifiex_get_sta_entry(priv, mac);
if (unlikely(!sta_ptr)) {
mwifiex_dbg(priv->adapter, ERROR,
"TDLS peer station not found in list\n");
return -1;
}
pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_operation) + 2);
*pos++ = WLAN_EID_HT_OPERATION;
*pos++ = sizeof(struct ieee80211_ht_operation);
ht_oper = (void *)pos;
ht_oper->primary_chan = bss_desc->channel;
/* follow AP's channel bandwidth */
if (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&
bss_desc->bcn_ht_cap &&
ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))
ht_oper->ht_param = bss_desc->bcn_ht_oper->ht_param;
if (vht_enabled) {
ht_oper->ht_param =
mwifiex_get_sec_chan_offset(bss_desc->channel);
ht_oper->ht_param |= BIT(2);
}
memcpy(&sta_ptr->tdls_cap.ht_oper, ht_oper,
sizeof(struct ieee80211_ht_operation));
return 0;
}
static int mwifiex_tdls_add_vht_oper(struct mwifiex_private *priv,
const u8 *mac, struct sk_buff *skb)
{
struct mwifiex_bssdescriptor *bss_desc;
struct ieee80211_vht_operation *vht_oper;
struct ieee80211_vht_cap *vht_cap, *ap_vht_cap = NULL;
struct mwifiex_sta_node *sta_ptr;
struct mwifiex_adapter *adapter = priv->adapter;
u8 supp_chwd_set, peer_supp_chwd_set;
u8 *pos, ap_supp_chwd_set, chan_bw;
u16 mcs_map_user, mcs_map_resp, mcs_map_result;
u16 mcs_user, mcs_resp, nss;
u32 usr_vht_cap_info;
bss_desc = &priv->curr_bss_params.bss_descriptor;
sta_ptr = mwifiex_get_sta_entry(priv, mac);
if (unlikely(!sta_ptr)) {
mwifiex_dbg(adapter, ERROR,
"TDLS peer station not found in list\n");
return -1;
}
if (!mwifiex_is_bss_in_11ac_mode(priv)) {
if (sta_ptr->tdls_cap.extcap.ext_capab[7] &
WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
mwifiex_dbg(adapter, WARN,
"TDLS peer doesn't support wider bandwidth\n");
return 0;
}
} else {
ap_vht_cap = bss_desc->bcn_vht_cap;
}
pos = (void *)skb_put(skb, sizeof(struct ieee80211_vht_operation) + 2);
*pos++ = WLAN_EID_VHT_OPERATION;
*pos++ = sizeof(struct ieee80211_vht_operation);
vht_oper = (struct ieee80211_vht_operation *)pos;
if (bss_desc->bss_band & BAND_A)
usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_a;
else
usr_vht_cap_info = adapter->usr_dot_11ac_dev_cap_bg;
/* find the minmum bandwith between AP/TDLS peers */
vht_cap = &sta_ptr->tdls_cap.vhtcap;
supp_chwd_set = GET_VHTCAP_CHWDSET(usr_vht_cap_info);
peer_supp_chwd_set =
GET_VHTCAP_CHWDSET(le32_to_cpu(vht_cap->vht_cap_info));
supp_chwd_set = min_t(u8, supp_chwd_set, peer_supp_chwd_set);
/* We need check AP's bandwidth when TDLS_WIDER_BANDWIDTH is off */
if (ap_vht_cap && sta_ptr->tdls_cap.extcap.ext_capab[7] &
WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED) {
ap_supp_chwd_set =
GET_VHTCAP_CHWDSET(le32_to_cpu(ap_vht_cap->vht_cap_info));
supp_chwd_set = min_t(u8, supp_chwd_set, ap_supp_chwd_set);
}
switch (supp_chwd_set) {
case IEEE80211_VHT_CHANWIDTH_80MHZ:
vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
break;
case IEEE80211_VHT_CHANWIDTH_160MHZ:
vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
break;
case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
break;
default:
vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
break;
}
mcs_map_user = GET_DEVRXMCSMAP(adapter->usr_dot_11ac_mcs_support);
mcs_map_resp = le16_to_cpu(vht_cap->supp_mcs.rx_mcs_map);
mcs_map_result = 0;
for (nss = 1; nss <= 8; nss++) {
mcs_user = GET_VHTNSSMCS(mcs_map_user, nss);
mcs_resp = GET_VHTNSSMCS(mcs_map_resp, nss);
if ((mcs_user == IEEE80211_VHT_MCS_NOT_SUPPORTED) ||
(mcs_resp == IEEE80211_VHT_MCS_NOT_SUPPORTED))
SET_VHTNSSMCS(mcs_map_result, nss,
IEEE80211_VHT_MCS_NOT_SUPPORTED);
else
SET_VHTNSSMCS(mcs_map_result, nss,
min_t(u16, mcs_user, mcs_resp));
}
vht_oper->basic_mcs_set = cpu_to_le16(mcs_map_result);
switch (vht_oper->chan_width) {
case IEEE80211_VHT_CHANWIDTH_80MHZ:
chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
break;
case IEEE80211_VHT_CHANWIDTH_160MHZ:
chan_bw = IEEE80211_VHT_CHANWIDTH_160MHZ;
break;
case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
chan_bw = IEEE80211_VHT_CHANWIDTH_80MHZ;
break;
default:
chan_bw = IEEE80211_VHT_CHANWIDTH_USE_HT;
break;
}
vht_oper->center_freq_seg1_idx =
mwifiex_get_center_freq_index(priv, BAND_AAC,
bss_desc->channel,
chan_bw);
return 0;
}
static void mwifiex_tdls_add_ext_capab(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct ieee_types_extcap *extcap;
extcap = (void *)skb_put(skb, sizeof(struct ieee_types_extcap));
extcap->ieee_hdr.element_id = WLAN_EID_EXT_CAPABILITY;
extcap->ieee_hdr.len = 8;
memset(extcap->ext_capab, 0, 8);
extcap->ext_capab[4] |= WLAN_EXT_CAPA5_TDLS_ENABLED;
if (priv->adapter->is_hw_11ac_capable)
extcap->ext_capab[7] |= WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED;
}
static void mwifiex_tdls_add_qos_capab(struct sk_buff *skb)
{
u8 *pos = (void *)skb_put(skb, 3);
*pos++ = WLAN_EID_QOS_CAPA;
*pos++ = 1;
*pos++ = MWIFIEX_TDLS_DEF_QOS_CAPAB;
}
static void
mwifiex_tdls_add_wmm_param_ie(struct mwifiex_private *priv, struct sk_buff *skb)
{
struct ieee80211_wmm_param_ie *wmm;
u8 ac_vi[] = {0x42, 0x43, 0x5e, 0x00};
u8 ac_vo[] = {0x62, 0x32, 0x2f, 0x00};
u8 ac_be[] = {0x03, 0xa4, 0x00, 0x00};
u8 ac_bk[] = {0x27, 0xa4, 0x00, 0x00};
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 default WMM AC parameters for TDLS link*/
memcpy(&wmm->ac[0], ac_be, sizeof(ac_be));
memcpy(&wmm->ac[1], ac_bk, sizeof(ac_bk));
memcpy(&wmm->ac[2], ac_vi, sizeof(ac_vi));
memcpy(&wmm->ac[3], ac_vo, sizeof(ac_vo));
}
static void
mwifiex_add_wmm_info_ie(struct mwifiex_private *priv, struct sk_buff *skb,
u8 qosinfo)
{
u8 *buf;
buf = (void *)skb_put(skb, MWIFIEX_TDLS_WMM_INFO_SIZE +
sizeof(struct ieee_types_header));
*buf++ = WLAN_EID_VENDOR_SPECIFIC;
*buf++ = 7; /* len */
*buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
*buf++ = 0x50;
*buf++ = 0xf2;
*buf++ = 2; /* WME */
*buf++ = 0; /* WME info */
*buf++ = 1; /* WME ver */
*buf++ = qosinfo; /* U-APSD no in use */
}
static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
const u8 *peer, u8 action_code,
u8 dialog_token,
u16 status_code, struct sk_buff *skb)
{
struct ieee80211_tdls_data *tf;
int ret;
u16 capab;
struct ieee80211_ht_cap *ht_cap;
u8 radio, *pos;
capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
memcpy(tf->da, peer, ETH_ALEN);
memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
tf->ether_type = cpu_to_be16(ETH_P_TDLS);
tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
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(capab);
ret = mwifiex_tdls_append_rates_ie(priv, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
ht_cap = (void *)pos;
radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
if (priv->adapter->is_hw_11ac_capable) {
ret = mwifiex_tdls_add_vht_capab(priv, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
mwifiex_tdls_add_aid(priv, skb);
}
mwifiex_tdls_add_ext_capab(priv, skb);
mwifiex_tdls_add_qos_capab(skb);
mwifiex_add_wmm_info_ie(priv, skb, 0);
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(capab);
ret = mwifiex_tdls_append_rates_ie(priv, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
ht_cap = (void *)pos;
radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
if (priv->adapter->is_hw_11ac_capable) {
ret = mwifiex_tdls_add_vht_capab(priv, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
mwifiex_tdls_add_aid(priv, skb);
}
mwifiex_tdls_add_ext_capab(priv, skb);
mwifiex_tdls_add_qos_capab(skb);
mwifiex_add_wmm_info_ie(priv, skb, 0);
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;
mwifiex_tdls_add_wmm_param_ie(priv, skb);
if (priv->adapter->is_hw_11ac_capable) {
ret = mwifiex_tdls_add_vht_oper(priv, peer, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
ret = mwifiex_tdls_add_ht_oper(priv, peer, 1, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
} else {
ret = mwifiex_tdls_add_ht_oper(priv, peer, 0, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
}
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:
mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
return -EINVAL;
}
return 0;
}
static void
mwifiex_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr,
const u8 *peer, const u8 *bssid)
{
struct ieee80211_tdls_lnkie *lnkid;
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) -
sizeof(struct ieee_types_header);
memcpy(lnkid->bssid, bssid, ETH_ALEN);
memcpy(lnkid->init_sta, src_addr, ETH_ALEN);
memcpy(lnkid->resp_sta, peer, ETH_ALEN);
}
int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
u8 action_code, u8 dialog_token,
u16 status_code, const u8 *extra_ies,
size_t extra_ies_len)
{
struct sk_buff *skb;
struct mwifiex_txinfo *tx_info;
int ret;
u16 skb_len;
skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
max(sizeof(struct ieee80211_mgmt),
sizeof(struct ieee80211_tdls_data)) +
MWIFIEX_MGMT_FRAME_HEADER_SIZE +
MWIFIEX_SUPPORTED_RATES +
3 + /* Qos Info */
sizeof(struct ieee_types_extcap) +
sizeof(struct ieee80211_ht_cap) +
sizeof(struct ieee_types_bss_co_2040) +
sizeof(struct ieee80211_ht_operation) +
sizeof(struct ieee80211_tdls_lnkie) +
sizeof(struct ieee80211_wmm_param_ie) +
extra_ies_len;
if (priv->adapter->is_hw_11ac_capable)
skb_len += sizeof(struct ieee_types_vht_cap) +
sizeof(struct ieee_types_vht_oper) +
sizeof(struct ieee_types_aid);
skb = dev_alloc_skb(skb_len);
if (!skb) {
mwifiex_dbg(priv->adapter, ERROR,
"allocate skb failed for management frame\n");
return -ENOMEM;
}
skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
switch (action_code) {
case WLAN_TDLS_SETUP_REQUEST:
case WLAN_TDLS_SETUP_CONFIRM:
case WLAN_TDLS_TEARDOWN:
case WLAN_TDLS_DISCOVERY_REQUEST:
ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
dialog_token, status_code,
skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
if (extra_ies_len)
memcpy(skb_put(skb, extra_ies_len), extra_ies,
extra_ies_len);
mwifiex_tdls_add_link_ie(skb, priv->curr_addr, peer,
priv->cfg_bssid);
break;
case WLAN_TDLS_SETUP_RESPONSE:
ret = mwifiex_prep_tdls_encap_data(priv, peer, action_code,
dialog_token, status_code,
skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
if (extra_ies_len)
memcpy(skb_put(skb, extra_ies_len), extra_ies,
extra_ies_len);
mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
priv->cfg_bssid);
break;
}
switch (action_code) {
case WLAN_TDLS_SETUP_REQUEST:
case WLAN_TDLS_SETUP_RESPONSE:
skb->priority = MWIFIEX_PRIO_BK;
break;
default:
skb->priority = MWIFIEX_PRIO_VI;
break;
}
tx_info = MWIFIEX_SKB_TXCB(skb);
memset(tx_info, 0, sizeof(*tx_info));
tx_info->bss_num = priv->bss_num;
tx_info->bss_type = priv->bss_type;
__net_timestamp(skb);
mwifiex_queue_tx_pkt(priv, skb);
return 0;
}
static int
mwifiex_construct_tdls_action_frame(struct mwifiex_private *priv,
const u8 *peer,
u8 action_code, u8 dialog_token,
u16 status_code, struct sk_buff *skb)
{
struct ieee80211_mgmt *mgmt;
u8 bc_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
int ret;
u16 capab;
struct ieee80211_ht_cap *ht_cap;
u8 radio, *pos;
capab = priv->curr_bss_params.bss_descriptor.cap_info_bitmap;
mgmt = (void *)skb_put(skb, offsetof(struct ieee80211_mgmt, u));
memset(mgmt, 0, 24);
memcpy(mgmt->da, peer, ETH_ALEN);
memcpy(mgmt->sa, priv->curr_addr, ETH_ALEN);
memcpy(mgmt->bssid, priv->cfg_bssid, ETH_ALEN);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
/* add address 4 */
pos = skb_put(skb, ETH_ALEN);
switch (action_code) {
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
skb_put(skb, sizeof(mgmt->u.action.u.tdls_discover_resp) + 1);
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(capab);
/* move back for addr4 */
memmove(pos + ETH_ALEN, &mgmt->u.action.category,
sizeof(mgmt->u.action.u.tdls_discover_resp));
/* init address 4 */
memcpy(pos, bc_addr, ETH_ALEN);
ret = mwifiex_tdls_append_rates_ie(priv, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
pos = (void *)skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
ht_cap = (void *)pos;
radio = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
ret = mwifiex_fill_cap_info(priv, radio, ht_cap);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
if (priv->adapter->is_hw_11ac_capable) {
ret = mwifiex_tdls_add_vht_capab(priv, skb);
if (ret) {
dev_kfree_skb_any(skb);
return ret;
}
mwifiex_tdls_add_aid(priv, skb);
}
mwifiex_tdls_add_ext_capab(priv, skb);
mwifiex_tdls_add_qos_capab(skb);
break;
default:
mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS action frame type\n");
return -EINVAL;
}
return 0;
}
int mwifiex_send_tdls_action_frame(struct mwifiex_private *priv, const u8 *peer,
u8 action_code, u8 dialog_token,
u16 status_code, const u8 *extra_ies,
size_t extra_ies_len)
{
struct sk_buff *skb;
struct mwifiex_txinfo *tx_info;
u8 *pos;
u32 pkt_type, tx_control;
u16 pkt_len, skb_len;
skb_len = MWIFIEX_MIN_DATA_HEADER_LEN +
max(sizeof(struct ieee80211_mgmt),
sizeof(struct ieee80211_tdls_data)) +
MWIFIEX_MGMT_FRAME_HEADER_SIZE +
MWIFIEX_SUPPORTED_RATES +
sizeof(struct ieee_types_extcap) +
sizeof(struct ieee80211_ht_cap) +
sizeof(struct ieee_types_bss_co_2040) +
sizeof(struct ieee80211_ht_operation) +
sizeof(struct ieee80211_tdls_lnkie) +
extra_ies_len +
3 + /* Qos Info */
ETH_ALEN; /* Address4 */
if (priv->adapter->is_hw_11ac_capable)
skb_len += sizeof(struct ieee_types_vht_cap) +
sizeof(struct ieee_types_vht_oper) +
sizeof(struct ieee_types_aid);
skb = dev_alloc_skb(skb_len);
if (!skb) {
mwifiex_dbg(priv->adapter, ERROR,
"allocate skb failed for management frame\n");
return -ENOMEM;
}
skb_reserve(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
pkt_type = PKT_TYPE_MGMT;
tx_control = 0;
pos = skb_put(skb, MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
memset(pos, 0, MWIFIEX_MGMT_FRAME_HEADER_SIZE + sizeof(pkt_len));
memcpy(pos, &pkt_type, sizeof(pkt_type));
memcpy(pos + sizeof(pkt_type), &tx_control, sizeof(tx_control));
if (mwifiex_construct_tdls_action_frame(priv, peer, action_code,
dialog_token, status_code,
skb)) {
dev_kfree_skb_any(skb);
return -EINVAL;
}
if (extra_ies_len)
memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
/* the TDLS link IE is always added last we are the responder */
mwifiex_tdls_add_link_ie(skb, peer, priv->curr_addr,
priv->cfg_bssid);
skb->priority = MWIFIEX_PRIO_VI;
tx_info = MWIFIEX_SKB_TXCB(skb);
memset(tx_info, 0, sizeof(*tx_info));
tx_info->bss_num = priv->bss_num;
tx_info->bss_type = priv->bss_type;
tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
pkt_len = skb->len - MWIFIEX_MGMT_FRAME_HEADER_SIZE - sizeof(pkt_len);
memcpy(skb->data + MWIFIEX_MGMT_FRAME_HEADER_SIZE, &pkt_len,
sizeof(pkt_len));
__net_timestamp(skb);
mwifiex_queue_tx_pkt(priv, skb);
return 0;
}
/* This function process tdls action frame from peer.
* Peer capabilities are stored into station node structure.
*/
void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
u8 *buf, int len)
{
struct mwifiex_sta_node *sta_ptr;
u8 *peer, *pos, *end;
u8 i, action, basic;
__le16 cap = 0;
int ie_len = 0;
if (len < (sizeof(struct ethhdr) + 3))
return;
if (*(buf + sizeof(struct ethhdr)) != WLAN_TDLS_SNAP_RFTYPE)
return;
if (*(buf + sizeof(struct ethhdr) + 1) != WLAN_CATEGORY_TDLS)
return;
peer = buf + ETH_ALEN;
action = *(buf + sizeof(struct ethhdr) + 2);
mwifiex_dbg(priv->adapter, DATA,
"rx:tdls action: peer=%pM, action=%d\n", peer, action);
switch (action) {
case WLAN_TDLS_SETUP_REQUEST:
if (len < (sizeof(struct ethhdr) + TDLS_REQ_FIX_LEN))
return;
pos = buf + sizeof(struct ethhdr) + 4;
/* payload 1+ category 1 + action 1 + dialog 1 */
cap = cpu_to_le16(*(u16 *)pos);
ie_len = len - sizeof(struct ethhdr) - TDLS_REQ_FIX_LEN;
pos += 2;
break;
case WLAN_TDLS_SETUP_RESPONSE:
if (len < (sizeof(struct ethhdr) + TDLS_RESP_FIX_LEN))
return;
/* payload 1+ category 1 + action 1 + dialog 1 + status code 2*/
pos = buf + sizeof(struct ethhdr) + 6;
cap = cpu_to_le16(*(u16 *)pos);
ie_len = len - sizeof(struct ethhdr) - TDLS_RESP_FIX_LEN;
pos += 2;
break;
case WLAN_TDLS_SETUP_CONFIRM:
if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
return;
pos = buf + sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN;
ie_len = len - sizeof(struct ethhdr) - TDLS_CONFIRM_FIX_LEN;
break;
default:
mwifiex_dbg(priv->adapter, ERROR, "Unknown TDLS frame type.\n");
return;
}
sta_ptr = mwifiex_add_sta_entry(priv, peer);
if (!sta_ptr)
return;
sta_ptr->tdls_cap.capab = cap;
for (end = pos + ie_len; pos + 1 < end; pos += 2 + pos[1]) {
if (pos + 2 + pos[1] > end)
break;
switch (*pos) {
case WLAN_EID_SUPP_RATES:
sta_ptr->tdls_cap.rates_len = pos[1];
for (i = 0; i < pos[1]; i++)
sta_ptr->tdls_cap.rates[i] = pos[i + 2];
break;
case WLAN_EID_EXT_SUPP_RATES:
basic = sta_ptr->tdls_cap.rates_len;
for (i = 0; i < pos[1]; i++)
sta_ptr->tdls_cap.rates[basic + i] = pos[i + 2];
sta_ptr->tdls_cap.rates_len += pos[1];
break;
case WLAN_EID_HT_CAPABILITY:
memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos,
sizeof(struct ieee80211_ht_cap));
sta_ptr->is_11n_enabled = 1;
break;
case WLAN_EID_HT_OPERATION:
memcpy(&sta_ptr->tdls_cap.ht_oper, pos,
sizeof(struct ieee80211_ht_operation));
break;
case WLAN_EID_BSS_COEX_2040:
sta_ptr->tdls_cap.coex_2040 = pos[2];
break;
case WLAN_EID_EXT_CAPABILITY:
memcpy((u8 *)&sta_ptr->tdls_cap.extcap, pos,
sizeof(struct ieee_types_header) +
min_t(u8, pos[1], 8));
break;
case WLAN_EID_RSN:
memcpy((u8 *)&sta_ptr->tdls_cap.rsn_ie, pos,
sizeof(struct ieee_types_header) +
min_t(u8, pos[1], IEEE_MAX_IE_SIZE -
sizeof(struct ieee_types_header)));
break;
case WLAN_EID_QOS_CAPA:
sta_ptr->tdls_cap.qos_info = pos[2];
break;
case WLAN_EID_VHT_OPERATION:
if (priv->adapter->is_hw_11ac_capable)
memcpy(&sta_ptr->tdls_cap.vhtoper, pos,
sizeof(struct ieee80211_vht_operation));
break;
case WLAN_EID_VHT_CAPABILITY:
if (priv->adapter->is_hw_11ac_capable) {
memcpy((u8 *)&sta_ptr->tdls_cap.vhtcap, pos,
sizeof(struct ieee80211_vht_cap));
sta_ptr->is_11ac_enabled = 1;
}
break;
case WLAN_EID_AID:
if (priv->adapter->is_hw_11ac_capable)
sta_ptr->tdls_cap.aid =
le16_to_cpu(*(__le16 *)(pos + 2));
default:
break;
}
}
return;
}
static int
mwifiex_tdls_process_config_link(struct mwifiex_private *priv, const u8 *peer)
{
struct mwifiex_sta_node *sta_ptr;
struct mwifiex_ds_tdls_oper tdls_oper;
memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
sta_ptr = mwifiex_get_sta_entry(priv, peer);
if (!sta_ptr || sta_ptr->tdls_status == TDLS_SETUP_FAILURE) {
mwifiex_dbg(priv->adapter, ERROR,
"link absent for peer %pM; cannot config\n", peer);
return -EINVAL;
}
memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
tdls_oper.tdls_action = MWIFIEX_TDLS_CONFIG_LINK;
return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
}
static int
mwifiex_tdls_process_create_link(struct mwifiex_private *priv, const u8 *peer)
{
struct mwifiex_sta_node *sta_ptr;
struct mwifiex_ds_tdls_oper tdls_oper;
memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
sta_ptr = mwifiex_get_sta_entry(priv, peer);
if (sta_ptr && sta_ptr->tdls_status == TDLS_SETUP_INPROGRESS) {
mwifiex_dbg(priv->adapter, WARN,
"Setup already in progress for peer %pM\n", peer);
return 0;
}
sta_ptr = mwifiex_add_sta_entry(priv, peer);
if (!sta_ptr)
return -ENOMEM;
sta_ptr->tdls_status = TDLS_SETUP_INPROGRESS;
mwifiex_hold_tdls_packets(priv, peer);
memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
tdls_oper.tdls_action = MWIFIEX_TDLS_CREATE_LINK;
return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
}
static int
mwifiex_tdls_process_disable_link(struct mwifiex_private *priv, const u8 *peer)
{
struct mwifiex_sta_node *sta_ptr;
struct mwifiex_ds_tdls_oper tdls_oper;
unsigned long flags;
memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
sta_ptr = mwifiex_get_sta_entry(priv, peer);
if (sta_ptr) {
if (sta_ptr->is_11n_enabled) {
mwifiex_11n_cleanup_reorder_tbl(priv);
spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
flags);
mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
flags);
}
mwifiex_del_sta_entry(priv, peer);
}
mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
mwifiex_auto_tdls_update_peer_status(priv, peer, TDLS_NOT_SETUP);
memcpy(&tdls_oper.peer_mac, peer, ETH_ALEN);
tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
return mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
HostCmd_ACT_GEN_SET, 0, &tdls_oper, true);
}
static int
mwifiex_tdls_process_enable_link(struct mwifiex_private *priv, const u8 *peer)
{
struct mwifiex_sta_node *sta_ptr;
struct ieee80211_mcs_info mcs;
unsigned long flags;
int i;
sta_ptr = mwifiex_get_sta_entry(priv, peer);
if (sta_ptr && (sta_ptr->tdls_status != TDLS_SETUP_FAILURE)) {
mwifiex_dbg(priv->adapter, MSG,
"tdls: enable link %pM success\n", peer);
sta_ptr->tdls_status = TDLS_SETUP_COMPLETE;
mcs = sta_ptr->tdls_cap.ht_capb.mcs;
if (mcs.rx_mask[0] != 0xff)
sta_ptr->is_11n_enabled = true;
if (sta_ptr->is_11n_enabled) {
if (le16_to_cpu(sta_ptr->tdls_cap.ht_capb.cap_info) &
IEEE80211_HT_CAP_MAX_AMSDU)
sta_ptr->max_amsdu =
MWIFIEX_TX_DATA_BUF_SIZE_8K;
else
sta_ptr->max_amsdu =
MWIFIEX_TX_DATA_BUF_SIZE_4K;
for (i = 0; i < MAX_NUM_TID; i++)
sta_ptr->ampdu_sta[i] =
priv->aggr_prio_tbl[i].ampdu_user;
} else {
for (i = 0; i < MAX_NUM_TID; i++)
sta_ptr->ampdu_sta[i] = BA_STREAM_NOT_ALLOWED;
}
memset(sta_ptr->rx_seq, 0xff, sizeof(sta_ptr->rx_seq));
mwifiex_restore_tdls_packets(priv, peer, TDLS_SETUP_COMPLETE);
mwifiex_auto_tdls_update_peer_status(priv, peer,
TDLS_SETUP_COMPLETE);
} else {
mwifiex_dbg(priv->adapter, ERROR,
"tdls: enable link %pM failed\n", peer);
if (sta_ptr) {
mwifiex_11n_cleanup_reorder_tbl(priv);
spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
flags);
mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
flags);
mwifiex_del_sta_entry(priv, peer);
}
mwifiex_restore_tdls_packets(priv, peer, TDLS_LINK_TEARDOWN);
mwifiex_auto_tdls_update_peer_status(priv, peer,
TDLS_NOT_SETUP);
return -1;
}
return 0;
}
int mwifiex_tdls_oper(struct mwifiex_private *priv, const u8 *peer, u8 action)
{
switch (action) {
case MWIFIEX_TDLS_ENABLE_LINK:
return mwifiex_tdls_process_enable_link(priv, peer);
case MWIFIEX_TDLS_DISABLE_LINK:
return mwifiex_tdls_process_disable_link(priv, peer);
case MWIFIEX_TDLS_CREATE_LINK:
return mwifiex_tdls_process_create_link(priv, peer);
case MWIFIEX_TDLS_CONFIG_LINK:
return mwifiex_tdls_process_config_link(priv, peer);
}
return 0;
}
int mwifiex_get_tdls_link_status(struct mwifiex_private *priv, const u8 *mac)
{
struct mwifiex_sta_node *sta_ptr;
sta_ptr = mwifiex_get_sta_entry(priv, mac);
if (sta_ptr)
return sta_ptr->tdls_status;
return TDLS_NOT_SETUP;
}
int mwifiex_get_tdls_list(struct mwifiex_private *priv,
struct tdls_peer_info *buf)
{
struct mwifiex_sta_node *sta_ptr;
struct tdls_peer_info *peer = buf;
int count = 0;
unsigned long flags;
if (!ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
return 0;
/* make sure we are in station mode and connected */
if (!(priv->bss_type == MWIFIEX_BSS_TYPE_STA && priv->media_connected))
return 0;
spin_lock_irqsave(&priv->sta_list_spinlock, flags);
list_for_each_entry(sta_ptr, &priv->sta_list, list) {
if (sta_ptr->tdls_status == TDLS_SETUP_COMPLETE) {
ether_addr_copy(peer->peer_addr, sta_ptr->mac_addr);
peer++;
count++;
if (count >= MWIFIEX_MAX_TDLS_PEER_SUPPORTED)
break;
}
}
spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
return count;
}
void mwifiex_disable_all_tdls_links(struct mwifiex_private *priv)
{
struct mwifiex_sta_node *sta_ptr;
struct mwifiex_ds_tdls_oper tdls_oper;
unsigned long flags;
if (list_empty(&priv->sta_list))
return;
list_for_each_entry(sta_ptr, &priv->sta_list, list) {
memset(&tdls_oper, 0, sizeof(struct mwifiex_ds_tdls_oper));
if (sta_ptr->is_11n_enabled) {
mwifiex_11n_cleanup_reorder_tbl(priv);
spin_lock_irqsave(&priv->wmm.ra_list_spinlock,
flags);
mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
flags);
}
mwifiex_restore_tdls_packets(priv, sta_ptr->mac_addr,
TDLS_LINK_TEARDOWN);
memcpy(&tdls_oper.peer_mac, sta_ptr->mac_addr, ETH_ALEN);
tdls_oper.tdls_action = MWIFIEX_TDLS_DISABLE_LINK;
if (mwifiex_send_cmd(priv, HostCmd_CMD_TDLS_OPER,
HostCmd_ACT_GEN_SET, 0, &tdls_oper, false))
mwifiex_dbg(priv->adapter, ERROR,
"Disable link failed for TDLS peer %pM",
sta_ptr->mac_addr);
}
mwifiex_del_all_sta_list(priv);
}
int mwifiex_tdls_check_tx(struct mwifiex_private *priv, struct sk_buff *skb)
{
struct mwifiex_auto_tdls_peer *peer;
unsigned long flags;
u8 mac[ETH_ALEN];
ether_addr_copy(mac, skb->data);
spin_lock_irqsave(&priv->auto_tdls_lock, flags);
list_for_each_entry(peer, &priv->auto_tdls_list, list) {
if (!memcmp(mac, peer->mac_addr, ETH_ALEN)) {
if (peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
peer->tdls_status == TDLS_NOT_SETUP &&
(peer->failure_count <
MWIFIEX_TDLS_MAX_FAIL_COUNT)) {
peer->tdls_status = TDLS_SETUP_INPROGRESS;
mwifiex_dbg(priv->adapter, INFO,
"setup TDLS link, peer=%pM rssi=%d\n",
peer->mac_addr, peer->rssi);
cfg80211_tdls_oper_request(priv->netdev,
peer->mac_addr,
NL80211_TDLS_SETUP,
0, GFP_ATOMIC);
peer->do_setup = false;
priv->check_tdls_tx = false;
} else if (peer->failure_count <
MWIFIEX_TDLS_MAX_FAIL_COUNT &&
peer->do_discover) {
mwifiex_send_tdls_data_frame(priv,
peer->mac_addr,
WLAN_TDLS_DISCOVERY_REQUEST,
1, 0, NULL, 0);
peer->do_discover = false;
}
}
}
spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
return 0;
}
void mwifiex_flush_auto_tdls_list(struct mwifiex_private *priv)
{
struct mwifiex_auto_tdls_peer *peer, *tmp_node;
unsigned long flags;
spin_lock_irqsave(&priv->auto_tdls_lock, flags);
list_for_each_entry_safe(peer, tmp_node, &priv->auto_tdls_list, list) {
list_del(&peer->list);
kfree(peer);
}
INIT_LIST_HEAD(&priv->auto_tdls_list);
spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
priv->check_tdls_tx = false;
}
void mwifiex_add_auto_tdls_peer(struct mwifiex_private *priv, const u8 *mac)
{
struct mwifiex_auto_tdls_peer *tdls_peer;
unsigned long flags;
if (!priv->adapter->auto_tdls)
return;
spin_lock_irqsave(&priv->auto_tdls_lock, flags);
list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
if (!memcmp(tdls_peer->mac_addr, mac, ETH_ALEN)) {
tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
tdls_peer->rssi_jiffies = jiffies;
spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
return;
}
}
/* create new TDLS peer */
tdls_peer = kzalloc(sizeof(*tdls_peer), GFP_ATOMIC);
if (tdls_peer) {
ether_addr_copy(tdls_peer->mac_addr, mac);
tdls_peer->tdls_status = TDLS_SETUP_INPROGRESS;
tdls_peer->rssi_jiffies = jiffies;
INIT_LIST_HEAD(&tdls_peer->list);
list_add_tail(&tdls_peer->list, &priv->auto_tdls_list);
mwifiex_dbg(priv->adapter, INFO,
"Add auto TDLS peer= %pM to list\n", mac);
}
spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
}
void mwifiex_auto_tdls_update_peer_status(struct mwifiex_private *priv,
const u8 *mac, u8 link_status)
{
struct mwifiex_auto_tdls_peer *peer;
unsigned long flags;
if (!priv->adapter->auto_tdls)
return;
spin_lock_irqsave(&priv->auto_tdls_lock, flags);
list_for_each_entry(peer, &priv->auto_tdls_list, list) {
if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
if ((link_status == TDLS_NOT_SETUP) &&
(peer->tdls_status == TDLS_SETUP_INPROGRESS))
peer->failure_count++;
else if (link_status == TDLS_SETUP_COMPLETE)
peer->failure_count = 0;
peer->tdls_status = link_status;
break;
}
}
spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
}
void mwifiex_auto_tdls_update_peer_signal(struct mwifiex_private *priv,
u8 *mac, s8 snr, s8 nflr)
{
struct mwifiex_auto_tdls_peer *peer;
unsigned long flags;
if (!priv->adapter->auto_tdls)
return;
spin_lock_irqsave(&priv->auto_tdls_lock, flags);
list_for_each_entry(peer, &priv->auto_tdls_list, list) {
if (!memcmp(peer->mac_addr, mac, ETH_ALEN)) {
peer->rssi = nflr - snr;
peer->rssi_jiffies = jiffies;
break;
}
}
spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
}
void mwifiex_check_auto_tdls(unsigned long context)
{
struct mwifiex_private *priv = (struct mwifiex_private *)context;
struct mwifiex_auto_tdls_peer *tdls_peer;
unsigned long flags;
u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;
if (WARN_ON_ONCE(!priv || !priv->adapter)) {
pr_err("mwifiex: %s: adapter or private structure is NULL\n",
__func__);
return;
}
if (unlikely(!priv->adapter->auto_tdls))
return;
if (!priv->auto_tdls_timer_active) {
mwifiex_dbg(priv->adapter, INFO,
"auto TDLS timer inactive; return");
return;
}
priv->check_tdls_tx = false;
if (list_empty(&priv->auto_tdls_list)) {
mod_timer(&priv->auto_tdls_timer,
jiffies +
msecs_to_jiffies(MWIFIEX_TIMER_10S));
return;
}
spin_lock_irqsave(&priv->auto_tdls_lock, flags);
list_for_each_entry(tdls_peer, &priv->auto_tdls_list, list) {
if ((jiffies - tdls_peer->rssi_jiffies) >
(MWIFIEX_AUTO_TDLS_IDLE_TIME * HZ)) {
tdls_peer->rssi = 0;
tdls_peer->do_discover = true;
priv->check_tdls_tx = true;
}
if (((tdls_peer->rssi >= MWIFIEX_TDLS_RSSI_LOW) ||
!tdls_peer->rssi) &&
tdls_peer->tdls_status == TDLS_SETUP_COMPLETE) {
tdls_peer->tdls_status = TDLS_LINK_TEARDOWN;
mwifiex_dbg(priv->adapter, MSG,
"teardown TDLS link,peer=%pM rssi=%d\n",
tdls_peer->mac_addr, -tdls_peer->rssi);
tdls_peer->do_discover = true;
priv->check_tdls_tx = true;
cfg80211_tdls_oper_request(priv->netdev,
tdls_peer->mac_addr,
NL80211_TDLS_TEARDOWN,
reason, GFP_ATOMIC);
} else if (tdls_peer->rssi &&
tdls_peer->rssi <= MWIFIEX_TDLS_RSSI_HIGH &&
tdls_peer->tdls_status == TDLS_NOT_SETUP &&
tdls_peer->failure_count <
MWIFIEX_TDLS_MAX_FAIL_COUNT) {
priv->check_tdls_tx = true;
tdls_peer->do_setup = true;
mwifiex_dbg(priv->adapter, INFO,
"check TDLS with peer=%pM\t"
"rssi=%d\n", tdls_peer->mac_addr,
tdls_peer->rssi);
}
}
spin_unlock_irqrestore(&priv->auto_tdls_lock, flags);
mod_timer(&priv->auto_tdls_timer,
jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
}
void mwifiex_setup_auto_tdls_timer(struct mwifiex_private *priv)
{
setup_timer(&priv->auto_tdls_timer, mwifiex_check_auto_tdls,
(unsigned long)priv);
priv->auto_tdls_timer_active = true;
mod_timer(&priv->auto_tdls_timer,
jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
}
void mwifiex_clean_auto_tdls(struct mwifiex_private *priv)
{
if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
priv->adapter->auto_tdls &&
priv->bss_type == MWIFIEX_BSS_TYPE_STA) {
priv->auto_tdls_timer_active = false;
del_timer(&priv->auto_tdls_timer);
mwifiex_flush_auto_tdls_list(priv);
}
}
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