// SPDX-License-Identifier: GPL-2.0
/* IEEE 802.11 SoftMAC layer
* Copyright (c) 2005 Andrea Merello <[email protected]>
*
* Mostly extracted from the rtl8180-sa2400 driver for the
* in-kernel generic ieee802.11 stack.
*
* Few lines might be stolen from other part of the rtllib
* stack. Copyright who own it's copyright
*
* WPA code stolen from the ipw2200 driver.
* Copyright who own it's copyright.
*/
#include "rtllib.h"
#include <linux/random.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <linux/etherdevice.h>
#include <linux/ieee80211.h>
static void rtllib_sta_wakeup(struct rtllib_device *ieee, short nl);
static short rtllib_is_54g(struct rtllib_network *net)
{
return (net->rates_ex_len > 0) || (net->rates_len > 4);
}
/* returns the total length needed for placing the RATE MFIE
* tag and the EXTENDED RATE MFIE tag if needed.
* It encludes two bytes per tag for the tag itself and its len
*/
static unsigned int rtllib_MFIE_rate_len(struct rtllib_device *ieee)
{
unsigned int rate_len = 0;
rate_len = RTLLIB_CCK_RATE_LEN + 2;
rate_len += RTLLIB_OFDM_RATE_LEN + 2;
return rate_len;
}
/* place the MFIE rate, tag to the memory (double) pointed.
* Then it updates the pointer so that
* it points after the new MFIE tag added.
*/
static void rtllib_mfie_brate(struct rtllib_device *ieee, u8 **tag_p)
{
u8 *tag = *tag_p;
*tag++ = MFIE_TYPE_RATES;
*tag++ = 4;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_1MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_2MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_5MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_CCK_RATE_11MB;
/* We may add an option for custom rates that specific HW
* might support
*/
*tag_p = tag;
}
static void rtllib_mfie_grate(struct rtllib_device *ieee, u8 **tag_p)
{
u8 *tag = *tag_p;
*tag++ = MFIE_TYPE_RATES_EX;
*tag++ = 8;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_6MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_9MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_12MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_18MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_24MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_36MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_48MB;
*tag++ = RTLLIB_BASIC_RATE_MASK | RTLLIB_OFDM_RATE_54MB;
/* We may add an option for custom rates that specific HW might
* support
*/
*tag_p = tag;
}
static void rtllib_wmm_info(struct rtllib_device *ieee, u8 **tag_p)
{
u8 *tag = *tag_p;
*tag++ = MFIE_TYPE_GENERIC;
*tag++ = 7;
*tag++ = 0x00;
*tag++ = 0x50;
*tag++ = 0xf2;
*tag++ = 0x02;
*tag++ = 0x00;
*tag++ = 0x01;
*tag++ = MAX_SP_Len;
*tag_p = tag;
}
static void rtllib_turbo_info(struct rtllib_device *ieee, u8 **tag_p)
{
u8 *tag = *tag_p;
*tag++ = MFIE_TYPE_GENERIC;
*tag++ = 7;
*tag++ = 0x00;
*tag++ = 0xe0;
*tag++ = 0x4c;
*tag++ = 0x01;
*tag++ = 0x02;
*tag++ = 0x11;
*tag++ = 0x00;
*tag_p = tag;
netdev_alert(ieee->dev, "This is enable turbo mode IE process\n");
}
static void enqueue_mgmt(struct rtllib_device *ieee, struct sk_buff *skb)
{
int nh;
nh = (ieee->mgmt_queue_head + 1) % MGMT_QUEUE_NUM;
/* if the queue is full but we have newer frames then
* just overwrites the oldest.
*
* if (nh == ieee->mgmt_queue_tail)
* return -1;
*/
ieee->mgmt_queue_head = nh;
ieee->mgmt_queue_ring[nh] = skb;
}
static void init_mgmt_queue(struct rtllib_device *ieee)
{
ieee->mgmt_queue_tail = 0;
ieee->mgmt_queue_head = 0;
}
u8 mgnt_query_tx_rate_exclude_cck_rates(struct rtllib_device *ieee)
{
u16 i;
u8 query_rate = 0;
u8 basic_rate;
for (i = 0; i < ieee->current_network.rates_len; i++) {
basic_rate = ieee->current_network.rates[i] & 0x7F;
if (!rtllib_is_cck_rate(basic_rate)) {
if (query_rate == 0) {
query_rate = basic_rate;
} else {
if (basic_rate < query_rate)
query_rate = basic_rate;
}
}
}
if (query_rate == 0) {
query_rate = 12;
netdev_info(ieee->dev, "No basic_rate found!!\n");
}
return query_rate;
}
static u8 mgnt_query_mgnt_frame_tx_rate(struct rtllib_device *ieee)
{
struct rt_hi_throughput *ht_info = ieee->ht_info;
u8 rate;
if (ht_info->iot_action & HT_IOT_ACT_MGNT_USE_CCK_6M)
rate = 0x0c;
else
rate = ieee->basic_rate & 0x7f;
if (rate == 0)
rate = 0x02;
return rate;
}
inline void softmac_mgmt_xmit(struct sk_buff *skb, struct rtllib_device *ieee)
{
unsigned long flags;
short single = ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE;
struct ieee80211_hdr_3addr *header =
(struct ieee80211_hdr_3addr *)skb->data;
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + 8);
spin_lock_irqsave(&ieee->lock, flags);
/* called with 2nd param 0, no mgmt lock required */
rtllib_sta_wakeup(ieee, 0);
if (ieee80211_is_beacon(header->frame_control))
tcb_desc->queue_index = BEACON_QUEUE;
else
tcb_desc->queue_index = MGNT_QUEUE;
if (ieee->disable_mgnt_queue)
tcb_desc->queue_index = HIGH_QUEUE;
tcb_desc->data_rate = mgnt_query_mgnt_frame_tx_rate(ieee);
tcb_desc->ratr_index = 7;
tcb_desc->tx_dis_rate_fallback = 1;
tcb_desc->tx_use_drv_assinged_rate = 1;
if (single) {
if (ieee->queue_stop) {
enqueue_mgmt(ieee, skb);
} else {
header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4);
if (ieee->seq_ctrl[0] == 0xFFF)
ieee->seq_ctrl[0] = 0;
else
ieee->seq_ctrl[0]++;
/* avoid watchdog triggers */
ieee->softmac_data_hard_start_xmit(skb, ieee->dev,
ieee->basic_rate);
}
spin_unlock_irqrestore(&ieee->lock, flags);
} else {
spin_unlock_irqrestore(&ieee->lock, flags);
spin_lock_irqsave(&ieee->mgmt_tx_lock, flags);
header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4);
if (ieee->seq_ctrl[0] == 0xFFF)
ieee->seq_ctrl[0] = 0;
else
ieee->seq_ctrl[0]++;
/* check whether the managed packet queued greater than 5 */
if (!ieee->check_nic_enough_desc(ieee->dev,
tcb_desc->queue_index) ||
skb_queue_len(&ieee->skb_waitq[tcb_desc->queue_index]) ||
ieee->queue_stop) {
/* insert the skb packet to the management queue
*
* as for the completion function, it does not need
* to check it any more.
*/
netdev_info(ieee->dev,
"%s():insert to waitqueue, queue_index:%d!\n",
__func__, tcb_desc->queue_index);
skb_queue_tail(&ieee->skb_waitq[tcb_desc->queue_index],
skb);
} else {
ieee->softmac_hard_start_xmit(skb, ieee->dev);
}
spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags);
}
}
static inline void
softmac_ps_mgmt_xmit(struct sk_buff *skb,
struct rtllib_device *ieee)
{
short single = ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE;
struct ieee80211_hdr_3addr *header =
(struct ieee80211_hdr_3addr *)skb->data;
u16 fc, type, stype;
struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + 8);
fc = le16_to_cpu(header->frame_control);
type = WLAN_FC_GET_TYPE(fc);
stype = WLAN_FC_GET_STYPE(fc);
if (stype != IEEE80211_STYPE_PSPOLL)
tcb_desc->queue_index = MGNT_QUEUE;
else
tcb_desc->queue_index = HIGH_QUEUE;
if (ieee->disable_mgnt_queue)
tcb_desc->queue_index = HIGH_QUEUE;
tcb_desc->data_rate = mgnt_query_mgnt_frame_tx_rate(ieee);
tcb_desc->ratr_index = 7;
tcb_desc->tx_dis_rate_fallback = 1;
tcb_desc->tx_use_drv_assinged_rate = 1;
if (single) {
if (type != RTLLIB_FTYPE_CTL) {
header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4);
if (ieee->seq_ctrl[0] == 0xFFF)
ieee->seq_ctrl[0] = 0;
else
ieee->seq_ctrl[0]++;
}
/* avoid watchdog triggers */
ieee->softmac_data_hard_start_xmit(skb, ieee->dev,
ieee->basic_rate);
} else {
if (type != RTLLIB_FTYPE_CTL) {
header->seq_ctrl = cpu_to_le16(ieee->seq_ctrl[0] << 4);
if (ieee->seq_ctrl[0] == 0xFFF)
ieee->seq_ctrl[0] = 0;
else
ieee->seq_ctrl[0]++;
}
ieee->softmac_hard_start_xmit(skb, ieee->dev);
}
}
static inline struct sk_buff *rtllib_probe_req(struct rtllib_device *ieee)
{
unsigned int len, rate_len;
u8 *tag;
struct sk_buff *skb;
struct rtllib_probe_request *req;
len = ieee->current_network.ssid_len;
rate_len = rtllib_MFIE_rate_len(ieee);
skb = dev_alloc_skb(sizeof(struct rtllib_probe_request) +
2 + len + rate_len + ieee->tx_headroom);
if (!skb)
return NULL;
skb_reserve(skb, ieee->tx_headroom);
req = skb_put(skb, sizeof(struct rtllib_probe_request));
req->header.frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
req->header.duration_id = 0;
eth_broadcast_addr(req->header.addr1);
ether_addr_copy(req->header.addr2, ieee->dev->dev_addr);
eth_broadcast_addr(req->header.addr3);
tag = skb_put(skb, len + 2 + rate_len);
*tag++ = MFIE_TYPE_SSID;
*tag++ = len;
memcpy(tag, ieee->current_network.ssid, len);
tag += len;
rtllib_mfie_brate(ieee, &tag);
rtllib_mfie_grate(ieee, &tag);
return skb;
}
/* Enables network monitor mode, all rx packets will be received. */
void rtllib_enable_net_monitor_mode(struct net_device *dev,
bool init_state)
{
struct rtllib_device *ieee = netdev_priv_rsl(dev);
netdev_info(dev, "========>Enter Monitor Mode\n");
ieee->allow_all_dest_addr_handler(dev, true, !init_state);
}
/* Disables network monitor mode. Only packets destinated to
* us will be received.
*/
void rtllib_disable_net_monitor_mode(struct net_device *dev, bool init_state)
{
struct rtllib_device *ieee = netdev_priv_rsl(dev);
netdev_info(dev, "========>Exit Monitor Mode\n");
ieee->allow_all_dest_addr_handler(dev, false, !init_state);
}
static void rtllib_send_probe(struct rtllib_device *ieee)
{
struct sk_buff *skb;
skb = rtllib_probe_req(ieee);
if (skb) {
softmac_mgmt_xmit(skb, ieee);
ieee->softmac_stats.tx_probe_rq++;
}
}
static void rtllib_send_probe_requests(struct rtllib_device *ieee)
{
if (ieee->softmac_features & IEEE_SOFTMAC_PROBERQ) {
rtllib_send_probe(ieee);
rtllib_send_probe(ieee);
}
}
/* this performs syncro scan blocking the caller until all channels
* in the allowed channel map has been checked.
*/
static void rtllib_softmac_scan_syncro(struct rtllib_device *ieee)
{
union iwreq_data wrqu;
short ch = 0;
ieee->be_scan_inprogress = true;
mutex_lock(&ieee->scan_mutex);
while (1) {
do {
ch++;
if (ch > MAX_CHANNEL_NUMBER)
goto out; /* scan completed */
} while (!ieee->active_channel_map[ch]);
/* this function can be called in two situations
* 1- We have switched to ad-hoc mode and we are
* performing a complete syncro scan before conclude
* there are no interesting cell and to create a
* new one. In this case the link state is
* MAC80211_NOLINK until we found an interesting cell.
* If so the ieee8021_new_net, called by the RX path
* will set the state to MAC80211_LINKED, so we stop
* scanning
* 2- We are linked and the root uses run iwlist scan.
* So we switch to MAC80211_LINKED_SCANNING to remember
* that we are still logically linked (not interested in
* new network events, despite for updating the net list,
* but we are temporarily 'unlinked' as the driver shall
* not filter RX frames and the channel is changing.
* So the only situation in which are interested is to check
* if the state become LINKED because of the #1 situation
*/
if (ieee->link_state == MAC80211_LINKED)
goto out;
if (ieee->sync_scan_hurryup) {
netdev_info(ieee->dev,
"============>sync_scan_hurryup out\n");
goto out;
}
ieee->set_chan(ieee->dev, ch);
if (ieee->active_channel_map[ch] == 1)
rtllib_send_probe_requests(ieee);
/* this prevent excessive time wait when we
* need to wait for a syncro scan to end..
*/
msleep_interruptible_rsl(RTLLIB_SOFTMAC_SCAN_TIME);
}
out:
ieee->actscanning = false;
ieee->sync_scan_hurryup = 0;
mutex_unlock(&ieee->scan_mutex);
ieee->be_scan_inprogress = false;
memset(&wrqu, 0, sizeof(wrqu));
wireless_send_event(ieee->dev, SIOCGIWSCAN, &wrqu, NULL);
}
static void rtllib_softmac_scan_wq(void *data)
{
struct rtllib_device *ieee = container_of_dwork_rsl(data,
struct rtllib_device, softmac_scan_wq);
u8 last_channel = ieee->current_network.channel;
if (!ieee->ieee_up)
return;
if (rtllib_act_scanning(ieee, true))
return;
mutex_lock(&ieee->scan_mutex);
if (ieee->rf_power_state == rf_off) {
netdev_info(ieee->dev,
"======>%s():rf state is rf_off, return\n",
__func__);
goto out1;
}
do {
ieee->current_network.channel =
(ieee->current_network.channel + 1) %
MAX_CHANNEL_NUMBER;
if (ieee->scan_watch_dog++ > MAX_CHANNEL_NUMBER) {
if (!ieee->active_channel_map[ieee->current_network.channel])
ieee->current_network.channel = 6;
goto out; /* no good chans */
}
} while (!ieee->active_channel_map[ieee->current_network.channel]);
if (ieee->scanning_continue == 0)
goto out;
ieee->set_chan(ieee->dev, ieee->current_network.channel);
if (ieee->active_channel_map[ieee->current_network.channel] == 1)
rtllib_send_probe_requests(ieee);
schedule_delayed_work(&ieee->softmac_scan_wq,
msecs_to_jiffies(RTLLIB_SOFTMAC_SCAN_TIME));
mutex_unlock(&ieee->scan_mutex);
return;
out:
ieee->current_network.channel = last_channel;
out1:
ieee->actscanning = false;
ieee->scan_watch_dog = 0;
ieee->scanning_continue = 0;
mutex_unlock(&ieee->scan_mutex);
}
static void rtllib_softmac_stop_scan(struct rtllib_device *ieee)
{
mutex_lock(&ieee->scan_mutex);
ieee->scan_watch_dog = 0;
if (ieee->scanning_continue == 1) {
ieee->scanning_continue = 0;
ieee->actscanning = false;
mutex_unlock(&ieee->scan_mutex);
cancel_delayed_work_sync(&ieee->softmac_scan_wq);
} else {
mutex_unlock(&ieee->scan_mutex);
}
}
void rtllib_stop_scan(struct rtllib_device *ieee)
{
if (ieee->softmac_features & IEEE_SOFTMAC_SCAN)
rtllib_softmac_stop_scan(ieee);
}
EXPORT_SYMBOL(rtllib_stop_scan);
void rtllib_stop_scan_syncro(struct rtllib_device *ieee)
{
if (ieee->softmac_features & IEEE_SOFTMAC_SCAN)
ieee->sync_scan_hurryup = 1;
}
EXPORT_SYMBOL(rtllib_stop_scan_syncro);
bool rtllib_act_scanning(struct rtllib_device *ieee, bool sync_scan)
{
if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) {
if (sync_scan)
return ieee->be_scan_inprogress;
else
return ieee->actscanning || ieee->be_scan_inprogress;
} else {
return test_bit(STATUS_SCANNING, &ieee->status);
}
}
EXPORT_SYMBOL(rtllib_act_scanning);
/* called with ieee->lock held */
static void rtllib_start_scan(struct rtllib_device *ieee)
{
ieee->rtllib_ips_leave_wq(ieee->dev);
if (ieee->softmac_features & IEEE_SOFTMAC_SCAN) {
if (ieee->scanning_continue == 0) {
ieee->actscanning = true;
ieee->scanning_continue = 1;
schedule_delayed_work(&ieee->softmac_scan_wq, 0);
}
}
}
/* called with wx_mutex held */
void rtllib_start_scan_syncro(struct rtllib_device *ieee)
{
ieee->sync_scan_hurryup = 0;
if (ieee->softmac_features & IEEE_SOFTMAC_SCAN)
rtllib_softmac_scan_syncro(ieee);
}
EXPORT_SYMBOL(rtllib_start_scan_syncro);
static inline struct sk_buff *
rtllib_authentication_req(struct rtllib_network *beacon,
struct rtllib_device *ieee,
int challengelen, u8 *daddr)
{
struct sk_buff *skb;
struct rtllib_authentication *auth;
int len;
len = sizeof(struct rtllib_authentication) + challengelen +
ieee->tx_headroom + 4;
skb = dev_alloc_skb(len);
if (!skb)
return NULL;
skb_reserve(skb, ieee->tx_headroom);
auth = skb_put(skb, sizeof(struct rtllib_authentication));
auth->header.frame_control = cpu_to_le16(IEEE80211_STYPE_AUTH);
if (challengelen)
auth->header.frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
auth->header.duration_id = cpu_to_le16(0x013a);
ether_addr_copy(auth->header.addr1, beacon->bssid);
ether_addr_copy(auth->header.addr2, ieee->dev->dev_addr);
ether_addr_copy(auth->header.addr3, beacon->bssid);
if (ieee->auth_mode == 0)
auth->algorithm = WLAN_AUTH_OPEN;
else if (ieee->auth_mode == 1)
auth->algorithm = cpu_to_le16(WLAN_AUTH_SHARED_KEY);
else if (ieee->auth_mode == 2)
auth->algorithm = WLAN_AUTH_OPEN;
auth->transaction = cpu_to_le16(ieee->associate_seq);
ieee->associate_seq++;
auth->status = cpu_to_le16(WLAN_STATUS_SUCCESS);
return skb;
}
static struct sk_buff *rtllib_null_func(struct rtllib_device *ieee, short pwr)
{
struct sk_buff *skb;
struct ieee80211_hdr_3addr *hdr;
skb = dev_alloc_skb(sizeof(struct ieee80211_hdr_3addr) + ieee->tx_headroom);
if (!skb)
return NULL;
skb_reserve(skb, ieee->tx_headroom);
hdr = skb_put(skb, sizeof(struct ieee80211_hdr_3addr));
ether_addr_copy(hdr->addr1, ieee->current_network.bssid);
ether_addr_copy(hdr->addr2, ieee->dev->dev_addr);
ether_addr_copy(hdr->addr3, ieee->current_network.bssid);
hdr->frame_control = cpu_to_le16(RTLLIB_FTYPE_DATA |
IEEE80211_STYPE_NULLFUNC | IEEE80211_FCTL_TODS |
(pwr ? IEEE80211_FCTL_PM : 0));
return skb;
}
static struct sk_buff *rtllib_pspoll_func(struct rtllib_device *ieee)
{
struct sk_buff *skb;
struct ieee80211_pspoll *hdr;
skb = dev_alloc_skb(sizeof(struct ieee80211_pspoll) + ieee->tx_headroom);
if (!skb)
return NULL;
skb_reserve(skb, ieee->tx_headroom);
hdr = skb_put(skb, sizeof(struct ieee80211_pspoll));
ether_addr_copy(hdr->bssid, ieee->current_network.bssid);
ether_addr_copy(hdr->ta, ieee->dev->dev_addr);
hdr->aid = cpu_to_le16(ieee->assoc_id | 0xc000);
hdr->frame_control = cpu_to_le16(RTLLIB_FTYPE_CTL | IEEE80211_STYPE_PSPOLL |
IEEE80211_FCTL_PM);
return skb;
}
static inline int sec_is_in_pmkid_list(struct rtllib_device *ieee, u8 *bssid)
{
int i = 0;
do {
if ((ieee->pmkid_list[i].used) &&
(memcmp(ieee->pmkid_list[i].bssid, bssid, ETH_ALEN) == 0))
break;
i++;
} while (i < NUM_PMKID_CACHE);
if (i == NUM_PMKID_CACHE)
i = -1;
return i;
}
static inline struct sk_buff *
rtllib_association_req(struct rtllib_network *beacon,
struct rtllib_device *ieee)
{
struct sk_buff *skb;
struct rtllib_assoc_request_frame *hdr;
u8 *tag, *ies;
int i;
u8 *ht_cap_buf = NULL;
u8 ht_cap_len = 0;
u8 *realtek_ie_buf = NULL;
u8 realtek_ie_len = 0;
int wpa_ie_len = ieee->wpa_ie_len;
int wps_ie_len = ieee->wps_ie_len;
unsigned int ckip_ie_len = 0;
unsigned int ccxrm_ie_len = 0;
unsigned int cxvernum_ie_len = 0;
struct lib80211_crypt_data *crypt;
int encrypt;
int pmk_cache_idx;
unsigned int rate_len = (beacon->rates_len ?
(beacon->rates_len + 2) : 0) +
(beacon->rates_ex_len ? (beacon->rates_ex_len) +
2 : 0);
unsigned int wmm_info_len = beacon->qos_data.supported ? 9 : 0;
unsigned int turbo_info_len = beacon->turbo_enable ? 9 : 0;
int len = 0;
crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
if (crypt)
encrypt = crypt && crypt->ops &&
((strcmp(crypt->ops->name, "R-WEP") == 0 ||
wpa_ie_len));
else
encrypt = 0;
if ((ieee->rtllib_ap_sec_type &&
(ieee->rtllib_ap_sec_type(ieee) & SEC_ALG_TKIP)) ||
ieee->forced_bg_mode) {
ieee->ht_info->enable_ht = 0;
ieee->mode = WIRELESS_MODE_G;
}
if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) {
ht_cap_buf = (u8 *)&ieee->ht_info->self_ht_cap;
ht_cap_len = sizeof(ieee->ht_info->self_ht_cap);
ht_construct_capability_element(ieee, ht_cap_buf, &ht_cap_len,
encrypt, true);
if (ieee->ht_info->current_rt2rt_aggregation) {
realtek_ie_buf = ieee->ht_info->sz_rt2rt_agg_buf;
realtek_ie_len =
sizeof(ieee->ht_info->sz_rt2rt_agg_buf);
ht_construct_rt2rt_agg_element(ieee, realtek_ie_buf,
&realtek_ie_len);
}
}
if (beacon->ckip_supported)
ckip_ie_len = 30 + 2;
if (beacon->ccx_rm_enable)
ccxrm_ie_len = 6 + 2;
if (beacon->bss_ccx_ver_number >= 2)
cxvernum_ie_len = 5 + 2;
pmk_cache_idx = sec_is_in_pmkid_list(ieee, ieee->current_network.bssid);
if (pmk_cache_idx >= 0) {
wpa_ie_len += 18;
netdev_info(ieee->dev, "[PMK cache]: WPA2 IE length: %x\n",
wpa_ie_len);
}
len = sizeof(struct rtllib_assoc_request_frame) + 2
+ beacon->ssid_len
+ rate_len
+ wpa_ie_len
+ wps_ie_len
+ wmm_info_len
+ turbo_info_len
+ ht_cap_len
+ realtek_ie_len
+ ckip_ie_len
+ ccxrm_ie_len
+ cxvernum_ie_len
+ ieee->tx_headroom;
skb = dev_alloc_skb(len);
if (!skb)
return NULL;
skb_reserve(skb, ieee->tx_headroom);
hdr = skb_put(skb, sizeof(struct rtllib_assoc_request_frame) + 2);
hdr->header.frame_control = cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ);
hdr->header.duration_id = cpu_to_le16(37);
ether_addr_copy(hdr->header.addr1, beacon->bssid);
ether_addr_copy(hdr->header.addr2, ieee->dev->dev_addr);
ether_addr_copy(hdr->header.addr3, beacon->bssid);
ether_addr_copy(ieee->ap_mac_addr, beacon->bssid);
hdr->capability = cpu_to_le16(WLAN_CAPABILITY_ESS);
if (beacon->capability & WLAN_CAPABILITY_PRIVACY)
hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);
if (beacon->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
if (beacon->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
hdr->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME);
hdr->listen_interval = cpu_to_le16(beacon->listen_interval);
hdr->info_element[0].id = MFIE_TYPE_SSID;
hdr->info_element[0].len = beacon->ssid_len;
skb_put_data(skb, beacon->ssid, beacon->ssid_len);
tag = skb_put(skb, rate_len);
if (beacon->rates_len) {
*tag++ = MFIE_TYPE_RATES;
*tag++ = beacon->rates_len;
for (i = 0; i < beacon->rates_len; i++)
*tag++ = beacon->rates[i];
}
if (beacon->rates_ex_len) {
*tag++ = MFIE_TYPE_RATES_EX;
*tag++ = beacon->rates_ex_len;
for (i = 0; i < beacon->rates_ex_len; i++)
*tag++ = beacon->rates_ex[i];
}
if (beacon->ckip_supported) {
static const u8 aironet_ie_oui[] = {0x00, 0x01, 0x66};
u8 ccx_aironet_buf[30];
struct octet_string os_ccx_aironet_ie;
memset(ccx_aironet_buf, 0, 30);
os_ccx_aironet_ie.octet = ccx_aironet_buf;
os_ccx_aironet_ie.Length = sizeof(ccx_aironet_buf);
memcpy(os_ccx_aironet_ie.octet, aironet_ie_oui,
sizeof(aironet_ie_oui));
os_ccx_aironet_ie.octet[IE_CISCO_FLAG_POSITION] |=
(SUPPORT_CKIP_PK | SUPPORT_CKIP_MIC);
tag = skb_put(skb, ckip_ie_len);
*tag++ = MFIE_TYPE_AIRONET;
*tag++ = os_ccx_aironet_ie.Length;
memcpy(tag, os_ccx_aironet_ie.octet, os_ccx_aironet_ie.Length);
tag += os_ccx_aironet_ie.Length;
}
if (beacon->ccx_rm_enable) {
static const u8 ccx_rm_cap_buf[] = {0x00, 0x40, 0x96, 0x01, 0x01,
0x00};
struct octet_string os_ccx_rm_cap;
os_ccx_rm_cap.octet = (u8 *)ccx_rm_cap_buf;
os_ccx_rm_cap.Length = sizeof(ccx_rm_cap_buf);
tag = skb_put(skb, ccxrm_ie_len);
*tag++ = MFIE_TYPE_GENERIC;
*tag++ = os_ccx_rm_cap.Length;
memcpy(tag, os_ccx_rm_cap.octet, os_ccx_rm_cap.Length);
tag += os_ccx_rm_cap.Length;
}
if (beacon->bss_ccx_ver_number >= 2) {
u8 ccx_ver_num_buf[] = {0x00, 0x40, 0x96, 0x03, 0x00};
struct octet_string os_ccx_ver_num;
ccx_ver_num_buf[4] = beacon->bss_ccx_ver_number;
os_ccx_ver_num.octet = ccx_ver_num_buf;
os_ccx_ver_num.Length = sizeof(ccx_ver_num_buf);
tag = skb_put(skb, cxvernum_ie_len);
*tag++ = MFIE_TYPE_GENERIC;
*tag++ = os_ccx_ver_num.Length;
memcpy(tag, os_ccx_ver_num.octet, os_ccx_ver_num.Length);
tag += os_ccx_ver_num.Length;
}
if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) {
if (ieee->ht_info->peer_ht_spec_ver != HT_SPEC_VER_EWC) {
tag = skb_put(skb, ht_cap_len);
*tag++ = MFIE_TYPE_HT_CAP;
*tag++ = ht_cap_len - 2;
memcpy(tag, ht_cap_buf, ht_cap_len - 2);
tag += ht_cap_len - 2;
}
}
if (wpa_ie_len) {
skb_put_data(skb, ieee->wpa_ie, ieee->wpa_ie_len);
if (pmk_cache_idx >= 0) {
tag = skb_put(skb, 18);
*tag = 1;
*(tag + 1) = 0;
memcpy((tag + 2), &ieee->pmkid_list[pmk_cache_idx].PMKID,
16);
}
}
if (wmm_info_len) {
tag = skb_put(skb, wmm_info_len);
rtllib_wmm_info(ieee, &tag);
}
if (wps_ie_len && ieee->wps_ie)
skb_put_data(skb, ieee->wps_ie, wps_ie_len);
if (turbo_info_len) {
tag = skb_put(skb, turbo_info_len);
rtllib_turbo_info(ieee, &tag);
}
if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) {
if (ieee->ht_info->peer_ht_spec_ver == HT_SPEC_VER_EWC) {
tag = skb_put(skb, ht_cap_len);
*tag++ = MFIE_TYPE_GENERIC;
*tag++ = ht_cap_len - 2;
memcpy(tag, ht_cap_buf, ht_cap_len - 2);
tag += ht_cap_len - 2;
}
if (ieee->ht_info->current_rt2rt_aggregation) {
tag = skb_put(skb, realtek_ie_len);
*tag++ = MFIE_TYPE_GENERIC;
*tag++ = realtek_ie_len - 2;
memcpy(tag, realtek_ie_buf, realtek_ie_len - 2);
}
}
kfree(ieee->assocreq_ies);
ieee->assocreq_ies = NULL;
ies = &hdr->info_element[0].id;
ieee->assocreq_ies_len = (skb->data + skb->len) - ies;
ieee->assocreq_ies = kmemdup(ies, ieee->assocreq_ies_len, GFP_ATOMIC);
if (!ieee->assocreq_ies)
ieee->assocreq_ies_len = 0;
return skb;
}
static void rtllib_associate_abort(struct rtllib_device *ieee)
{
unsigned long flags;
spin_lock_irqsave(&ieee->lock, flags);
ieee->associate_seq++;
/* don't scan, and avoid to have the RX path possibly
* try again to associate. Even do not react to AUTH or
* ASSOC response. Just wait for the retry wq to be scheduled.
* Here we will check if there are good nets to associate
* with, so we retry or just get back to NO_LINK and scanning
*/
if (ieee->link_state == RTLLIB_ASSOCIATING_AUTHENTICATING) {
netdev_dbg(ieee->dev, "Authentication failed\n");
ieee->softmac_stats.no_auth_rs++;
} else {
netdev_dbg(ieee->dev, "Association failed\n");
ieee->softmac_stats.no_ass_rs++;
}
ieee->link_state = RTLLIB_ASSOCIATING_RETRY;
schedule_delayed_work(&ieee->associate_retry_wq,
RTLLIB_SOFTMAC_ASSOC_RETRY_TIME);
spin_unlock_irqrestore(&ieee->lock, flags);
}
static void rtllib_associate_abort_cb(struct timer_list *t)
{
struct rtllib_device *dev = from_timer(dev, t, associate_timer);
rtllib_associate_abort(dev);
}
static void rtllib_associate_step1(struct rtllib_device *ieee, u8 *daddr)
{
struct rtllib_network *beacon = &ieee->current_network;
struct sk_buff *skb;
netdev_dbg(ieee->dev, "Stopping scan\n");
ieee->softmac_stats.tx_auth_rq++;
skb = rtllib_authentication_req(beacon, ieee, 0, daddr);
if (!skb) {
rtllib_associate_abort(ieee);
} else {
ieee->link_state = RTLLIB_ASSOCIATING_AUTHENTICATING;
netdev_dbg(ieee->dev, "Sending authentication request\n");
softmac_mgmt_xmit(skb, ieee);
if (!timer_pending(&ieee->associate_timer)) {
ieee->associate_timer.expires = jiffies + (HZ / 2);
add_timer(&ieee->associate_timer);
}
}
}
static void rtllib_auth_challenge(struct rtllib_device *ieee, u8 *challenge,
int chlen)
{
u8 *c;
struct sk_buff *skb;
struct rtllib_network *beacon = &ieee->current_network;
ieee->associate_seq++;
ieee->softmac_stats.tx_auth_rq++;
skb = rtllib_authentication_req(beacon, ieee, chlen + 2, beacon->bssid);
if (!skb) {
rtllib_associate_abort(ieee);
} else {
c = skb_put(skb, chlen + 2);
*(c++) = MFIE_TYPE_CHALLENGE;
*(c++) = chlen;
memcpy(c, challenge, chlen);
netdev_dbg(ieee->dev,
"Sending authentication challenge response\n");
rtllib_encrypt_fragment(ieee, skb,
sizeof(struct ieee80211_hdr_3addr));
softmac_mgmt_xmit(skb, ieee);
mod_timer(&ieee->associate_timer, jiffies + (HZ / 2));
}
kfree(challenge);
}
static void rtllib_associate_step2(struct rtllib_device *ieee)
{
struct sk_buff *skb;
struct rtllib_network *beacon = &ieee->current_network;
del_timer_sync(&ieee->associate_timer);
netdev_dbg(ieee->dev, "Sending association request\n");
ieee->softmac_stats.tx_ass_rq++;
skb = rtllib_association_req(beacon, ieee);
if (!skb) {
rtllib_associate_abort(ieee);
} else {
softmac_mgmt_xmit(skb, ieee);
mod_timer(&ieee->associate_timer, jiffies + (HZ / 2));
}
}
static void rtllib_associate_complete_wq(void *data)
{
struct rtllib_device *ieee = (struct rtllib_device *)
container_of(data,
struct rtllib_device,
associate_complete_wq);
struct rt_pwr_save_ctrl *psc = &ieee->pwr_save_ctrl;
netdev_info(ieee->dev, "Associated successfully with %pM\n",
ieee->current_network.bssid);
netdev_info(ieee->dev, "normal associate\n");
notify_wx_assoc_event(ieee);
netif_carrier_on(ieee->dev);
ieee->is_roaming = false;
if (rtllib_is_54g(&ieee->current_network)) {
ieee->rate = 108;
netdev_info(ieee->dev, "Using G rates:%d\n", ieee->rate);
} else {
ieee->rate = 22;
ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_B);
netdev_info(ieee->dev, "Using B rates:%d\n", ieee->rate);
}
if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht) {
netdev_info(ieee->dev, "Successfully associated, ht enabled\n");
ht_on_assoc_rsp(ieee);
} else {
netdev_info(ieee->dev,
"Successfully associated, ht not enabled(%d, %d)\n",
ieee->ht_info->current_ht_support,
ieee->ht_info->enable_ht);
memset(ieee->dot11ht_oper_rate_set, 0, 16);
}
ieee->link_detect_info.slot_num = 2 * (1 +
ieee->current_network.beacon_interval /
500);
if (ieee->link_detect_info.num_recv_bcn_in_period == 0 ||
ieee->link_detect_info.num_recv_data_in_period == 0) {
ieee->link_detect_info.num_recv_bcn_in_period = 1;
ieee->link_detect_info.num_recv_data_in_period = 1;
}
psc->lps_idle_count = 0;
ieee->link_change(ieee->dev);
}
static void rtllib_sta_send_associnfo(struct rtllib_device *ieee)
{
}
static void rtllib_associate_complete(struct rtllib_device *ieee)
{
del_timer_sync(&ieee->associate_timer);
ieee->link_state = MAC80211_LINKED;
rtllib_sta_send_associnfo(ieee);
schedule_work(&ieee->associate_complete_wq);
}
static void rtllib_associate_procedure_wq(void *data)
{
struct rtllib_device *ieee = container_of_dwork_rsl(data,
struct rtllib_device,
associate_procedure_wq);
rtllib_stop_scan_syncro(ieee);
ieee->rtllib_ips_leave(ieee->dev);
mutex_lock(&ieee->wx_mutex);
rtllib_stop_scan(ieee);
ht_set_connect_bw_mode(ieee, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
if (ieee->rf_power_state == rf_off) {
ieee->rtllib_ips_leave_wq(ieee->dev);
mutex_unlock(&ieee->wx_mutex);
return;
}
ieee->associate_seq = 1;
rtllib_associate_step1(ieee, ieee->current_network.bssid);
mutex_unlock(&ieee->wx_mutex);
}
inline void rtllib_softmac_new_net(struct rtllib_device *ieee,
struct rtllib_network *net)
{
u8 tmp_ssid[IW_ESSID_MAX_SIZE + 1];
int tmp_ssid_len = 0;
short apset, ssidset, ssidbroad, apmatch, ssidmatch;
/* we are interested in new only if we are not associated
* and we are not associating / authenticating
*/
if (ieee->link_state != MAC80211_NOLINK)
return;
if ((ieee->iw_mode == IW_MODE_INFRA) && !(net->capability &
WLAN_CAPABILITY_ESS))
return;
if (ieee->iw_mode == IW_MODE_INFRA) {
/* if the user specified the AP MAC, we need also the essid
* This could be obtained by beacons or, if the network does not
* broadcast it, it can be put manually.
*/
apset = ieee->wap_set;
ssidset = ieee->ssid_set;
ssidbroad = !(net->ssid_len == 0 || net->ssid[0] == '\0');
apmatch = (memcmp(ieee->current_network.bssid, net->bssid,
ETH_ALEN) == 0);
if (!ssidbroad) {
ssidmatch = (ieee->current_network.ssid_len ==
net->hidden_ssid_len) &&
(!strncmp(ieee->current_network.ssid,
net->hidden_ssid, net->hidden_ssid_len));
if (net->hidden_ssid_len > 0) {
strncpy(net->ssid, net->hidden_ssid,
net->hidden_ssid_len);
net->ssid_len = net->hidden_ssid_len;
ssidbroad = 1;
}
} else {
ssidmatch =
(ieee->current_network.ssid_len == net->ssid_len) &&
(!strncmp(ieee->current_network.ssid, net->ssid,
net->ssid_len));
}
/* if the user set the AP check if match.
* if the network does not broadcast essid we check the
* user supplied ANY essid
* if the network does broadcast and the user does not set
* essid it is OK
* if the network does broadcast and the user did set essid
* check if essid match
* if the ap is not set, check that the user set the bssid
* and the network does broadcast and that those two bssid match
*/
if ((apset && apmatch &&
((ssidset && ssidbroad && ssidmatch) ||
(ssidbroad && !ssidset) || (!ssidbroad && ssidset))) ||
(!apset && ssidset && ssidbroad && ssidmatch) ||
(ieee->is_roaming && ssidset && ssidbroad && ssidmatch)) {
/* Save the essid so that if it is hidden, it is
* replaced with the essid provided by the user.
*/
if (!ssidbroad) {
memcpy(tmp_ssid, ieee->current_network.ssid,
ieee->current_network.ssid_len);
tmp_ssid_len = ieee->current_network.ssid_len;
}
memcpy(&ieee->current_network, net,
sizeof(ieee->current_network));
if (!ssidbroad) {
memcpy(ieee->current_network.ssid, tmp_ssid,
tmp_ssid_len);
ieee->current_network.ssid_len = tmp_ssid_len;
}
netdev_info(ieee->dev,
"Linking with %s,channel:%d, qos:%d, myHT:%d, networkHT:%d, mode:%x cur_net.flags:0x%x\n",
ieee->current_network.ssid,
ieee->current_network.channel,
ieee->current_network.qos_data.supported,
ieee->ht_info->enable_ht,
ieee->current_network.bssht.bd_support_ht,
ieee->current_network.mode,
ieee->current_network.flags);
if ((rtllib_act_scanning(ieee, false)) &&
!(ieee->softmac_features & IEEE_SOFTMAC_SCAN))
rtllib_stop_scan_syncro(ieee);
ht_reset_iot_setting(ieee->ht_info);
ieee->wmm_acm = 0;
if (ieee->iw_mode == IW_MODE_INFRA) {
/* Join the network for the first time */
ieee->asoc_retry_count = 0;
if ((ieee->current_network.qos_data.supported == 1) &&
ieee->current_network.bssht.bd_support_ht)
ht_reset_self_and_save_peer_setting(ieee,
&ieee->current_network);
else
ieee->ht_info->current_ht_support = false;
ieee->link_state = RTLLIB_ASSOCIATING;
schedule_delayed_work(&ieee->associate_procedure_wq, 0);
} else {
if (rtllib_is_54g(&ieee->current_network)) {
ieee->rate = 108;
ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_G);
netdev_info(ieee->dev,
"Using G rates\n");
} else {
ieee->rate = 22;
ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_B);
netdev_info(ieee->dev,
"Using B rates\n");
}
memset(ieee->dot11ht_oper_rate_set, 0, 16);
ieee->link_state = MAC80211_LINKED;
}
}
}
}
static void rtllib_softmac_check_all_nets(struct rtllib_device *ieee)
{
unsigned long flags;
struct rtllib_network *target;
spin_lock_irqsave(&ieee->lock, flags);
list_for_each_entry(target, &ieee->network_list, list) {
/* if the state become different that NOLINK means
* we had found what we are searching for
*/
if (ieee->link_state != MAC80211_NOLINK)
break;
if (ieee->scan_age == 0 || time_after(target->last_scanned +
ieee->scan_age, jiffies))
rtllib_softmac_new_net(ieee, target);
}
spin_unlock_irqrestore(&ieee->lock, flags);
}
static inline int auth_parse(struct net_device *dev, struct sk_buff *skb,
u8 **challenge, int *chlen)
{
struct rtllib_authentication *a;
u8 *t;
if (skb->len < (sizeof(struct rtllib_authentication) -
sizeof(struct rtllib_info_element))) {
netdev_dbg(dev, "invalid len in auth resp: %d\n", skb->len);
return -EINVAL;
}
*challenge = NULL;
a = (struct rtllib_authentication *)skb->data;
if (skb->len > (sizeof(struct rtllib_authentication) + 3)) {
t = skb->data + sizeof(struct rtllib_authentication);
if (*(t++) == MFIE_TYPE_CHALLENGE) {
*chlen = *(t++);
*challenge = kmemdup(t, *chlen, GFP_ATOMIC);
if (!*challenge)
return -ENOMEM;
}
}
if (a->status) {
netdev_dbg(dev, "auth_parse() failed\n");
return -EINVAL;
}
return 0;
}
static inline u16 assoc_parse(struct rtllib_device *ieee, struct sk_buff *skb,
int *aid)
{
struct rtllib_assoc_response_frame *response_head;
u16 status_code;
if (skb->len < sizeof(struct rtllib_assoc_response_frame)) {
netdev_dbg(ieee->dev, "Invalid len in auth resp: %d\n",
skb->len);
return 0xcafe;
}
response_head = (struct rtllib_assoc_response_frame *)skb->data;
*aid = le16_to_cpu(response_head->aid) & 0x3fff;
status_code = le16_to_cpu(response_head->status);
if ((status_code == WLAN_STATUS_ASSOC_DENIED_RATES ||
status_code == WLAN_STATUS_CAPS_UNSUPPORTED) &&
((ieee->mode == WIRELESS_MODE_G) &&
(ieee->current_network.mode == WIRELESS_MODE_N_24G) &&
(ieee->asoc_retry_count++ < (RT_ASOC_RETRY_LIMIT - 1)))) {
ieee->ht_info->iot_action |= HT_IOT_ACT_PURE_N_MODE;
} else {
ieee->asoc_retry_count = 0;
}
return le16_to_cpu(response_head->status);
}
void rtllib_sta_ps_send_null_frame(struct rtllib_device *ieee, short pwr)
{
struct sk_buff *buf = rtllib_null_func(ieee, pwr);
if (buf)
softmac_ps_mgmt_xmit(buf, ieee);
}
EXPORT_SYMBOL(rtllib_sta_ps_send_null_frame);
void rtllib_sta_ps_send_pspoll_frame(struct rtllib_device *ieee)
{
struct sk_buff *buf = rtllib_pspoll_func(ieee);
if (buf)
softmac_ps_mgmt_xmit(buf, ieee);
}
static short rtllib_sta_ps_sleep(struct rtllib_device *ieee, u64 *time)
{
int timeout;
u8 dtim;
struct rt_pwr_save_ctrl *psc = &ieee->pwr_save_ctrl;
if (ieee->lps_delay_cnt) {
ieee->lps_delay_cnt--;
return 0;
}
dtim = ieee->current_network.dtim_data;
if (!(dtim & RTLLIB_DTIM_VALID))
return 0;
timeout = ieee->current_network.beacon_interval;
ieee->current_network.dtim_data = RTLLIB_DTIM_INVALID;
/* there's no need to notify AP that I find you buffered
* with broadcast packet
*/
if (dtim & (RTLLIB_DTIM_UCAST & ieee->ps))
return 2;
if (!time_after(jiffies,
dev_trans_start(ieee->dev) + msecs_to_jiffies(timeout)))
return 0;
if (!time_after(jiffies,
ieee->last_rx_ps_time + msecs_to_jiffies(timeout)))
return 0;
if ((ieee->softmac_features & IEEE_SOFTMAC_SINGLE_QUEUE) &&
(ieee->mgmt_queue_tail != ieee->mgmt_queue_head))
return 0;
if (time) {
if (ieee->awake_pkt_sent) {
psc->lps_awake_intvl = 1;
} else {
u8 max_period = 5;
if (psc->lps_awake_intvl == 0)
psc->lps_awake_intvl = 1;
psc->lps_awake_intvl = (psc->lps_awake_intvl >=
max_period) ? max_period :
(psc->lps_awake_intvl + 1);
}
{
u8 lps_awake_intvl_tmp = 0;
u8 period = ieee->current_network.dtim_period;
u8 count = ieee->current_network.tim.tim_count;
if (count == 0) {
if (psc->lps_awake_intvl > period)
lps_awake_intvl_tmp = period +
(psc->lps_awake_intvl -
period) -
((psc->lps_awake_intvl - period) %
period);
else
lps_awake_intvl_tmp = psc->lps_awake_intvl;
} else {
if (psc->lps_awake_intvl >
ieee->current_network.tim.tim_count)
lps_awake_intvl_tmp = count +
(psc->lps_awake_intvl - count) -
((psc->lps_awake_intvl - count) % period);
else
lps_awake_intvl_tmp = psc->lps_awake_intvl;
}
*time = ieee->current_network.last_dtim_sta_time
+ msecs_to_jiffies(ieee->current_network.beacon_interval *
lps_awake_intvl_tmp);
}
}
return 1;
}
static inline void rtllib_sta_ps(struct work_struct *work)
{
struct rtllib_device *ieee;
u64 time;
short sleep;
unsigned long flags, flags2;
ieee = container_of(work, struct rtllib_device, ps_task);
spin_lock_irqsave(&ieee->lock, flags);
if ((ieee->ps == RTLLIB_PS_DISABLED ||
ieee->iw_mode != IW_MODE_INFRA ||
ieee->link_state != MAC80211_LINKED)) {
spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);
rtllib_sta_wakeup(ieee, 1);
spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);
}
sleep = rtllib_sta_ps_sleep(ieee, &time);
/* 2 wake, 1 sleep, 0 do nothing */
if (sleep == 0)
goto out;
if (sleep == 1) {
if (ieee->sta_sleep == LPS_IS_SLEEP) {
ieee->enter_sleep_state(ieee->dev, time);
} else if (ieee->sta_sleep == LPS_IS_WAKE) {
spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);
if (ieee->ps_is_queue_empty(ieee->dev)) {
ieee->sta_sleep = LPS_WAIT_NULL_DATA_SEND;
ieee->ack_tx_to_ieee = 1;
rtllib_sta_ps_send_null_frame(ieee, 1);
ieee->ps_time = time;
}
spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);
}
ieee->awake_pkt_sent = false;
} else if (sleep == 2) {
spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);
rtllib_sta_wakeup(ieee, 1);
spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);
}
out:
spin_unlock_irqrestore(&ieee->lock, flags);
}
static void rtllib_sta_wakeup(struct rtllib_device *ieee, short nl)
{
if (ieee->sta_sleep == LPS_IS_WAKE) {
if (nl) {
if (ieee->ht_info->iot_action &
HT_IOT_ACT_NULL_DATA_POWER_SAVING) {
ieee->ack_tx_to_ieee = 1;
rtllib_sta_ps_send_null_frame(ieee, 0);
} else {
ieee->ack_tx_to_ieee = 1;
rtllib_sta_ps_send_pspoll_frame(ieee);
}
}
return;
}
if (ieee->sta_sleep == LPS_IS_SLEEP)
ieee->sta_wake_up(ieee->dev);
if (nl) {
if (ieee->ht_info->iot_action &
HT_IOT_ACT_NULL_DATA_POWER_SAVING) {
ieee->ack_tx_to_ieee = 1;
rtllib_sta_ps_send_null_frame(ieee, 0);
} else {
ieee->ack_tx_to_ieee = 1;
ieee->polling = true;
rtllib_sta_ps_send_pspoll_frame(ieee);
}
} else {
ieee->sta_sleep = LPS_IS_WAKE;
ieee->polling = false;
}
}
void rtllib_ps_tx_ack(struct rtllib_device *ieee, short success)
{
unsigned long flags, flags2;
spin_lock_irqsave(&ieee->lock, flags);
if (ieee->sta_sleep == LPS_WAIT_NULL_DATA_SEND) {
/* Null frame with PS bit set */
if (success) {
ieee->sta_sleep = LPS_IS_SLEEP;
ieee->enter_sleep_state(ieee->dev, ieee->ps_time);
}
/* if the card report not success we can't be sure the AP
* has not RXed so we can't assume the AP believe us awake
*/
} else {/* 21112005 - tx again null without PS bit if lost */
if ((ieee->sta_sleep == LPS_IS_WAKE) && !success) {
spin_lock_irqsave(&ieee->mgmt_tx_lock, flags2);
if (ieee->ht_info->iot_action &
HT_IOT_ACT_NULL_DATA_POWER_SAVING)
rtllib_sta_ps_send_null_frame(ieee, 0);
else
rtllib_sta_ps_send_pspoll_frame(ieee);
spin_unlock_irqrestore(&ieee->mgmt_tx_lock, flags2);
}
}
spin_unlock_irqrestore(&ieee->lock, flags);
}
EXPORT_SYMBOL(rtllib_ps_tx_ack);
static void rtllib_process_action(struct rtllib_device *ieee,
struct sk_buff *skb)
{
u8 *act = skb->data + RTLLIB_3ADDR_LEN;
u8 category = 0;
category = *act;
act++;
switch (category) {
case ACT_CAT_BA:
switch (*act) {
case ACT_ADDBAREQ:
rtllib_rx_add_ba_req(ieee, skb);
break;
case ACT_ADDBARSP:
rtllib_rx_add_ba_rsp(ieee, skb);
break;
case ACT_DELBA:
rtllib_rx_DELBA(ieee, skb);
break;
}
break;
default:
break;
}
}
static inline int
rtllib_rx_assoc_resp(struct rtllib_device *ieee, struct sk_buff *skb,
struct rtllib_rx_stats *rx_stats)
{
u16 errcode;
int aid;
u8 *ies;
struct rtllib_assoc_response_frame *assoc_resp;
struct ieee80211_hdr_3addr *header = (struct ieee80211_hdr_3addr *)skb->data;
u16 frame_ctl = le16_to_cpu(header->frame_control);
netdev_dbg(ieee->dev, "received [RE]ASSOCIATION RESPONSE (%d)\n",
WLAN_FC_GET_STYPE(frame_ctl));
if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) &&
ieee->link_state == RTLLIB_ASSOCIATING_AUTHENTICATED &&
(ieee->iw_mode == IW_MODE_INFRA)) {
errcode = assoc_parse(ieee, skb, &aid);
if (!errcode) {
struct rtllib_network *network =
kzalloc(sizeof(struct rtllib_network),
GFP_ATOMIC);
if (!network)
return 1;
ieee->link_state = MAC80211_LINKED;
ieee->assoc_id = aid;
ieee->softmac_stats.rx_ass_ok++;
/* station support qos */
/* Let the register setting default with Legacy station */
assoc_resp = (struct rtllib_assoc_response_frame *)skb->data;
if (ieee->current_network.qos_data.supported == 1) {
if (rtllib_parse_info_param(ieee, assoc_resp->info_element,
rx_stats->len - sizeof(*assoc_resp),
network, rx_stats)) {
kfree(network);
return 1;
}
memcpy(ieee->ht_info->peer_ht_cap_buf,
network->bssht.bd_ht_cap_buf,
network->bssht.bd_ht_cap_len);
memcpy(ieee->ht_info->peer_ht_info_buf,
network->bssht.bd_ht_info_buf,
network->bssht.bd_ht_info_len);
ieee->handle_assoc_response(ieee->dev,
(struct rtllib_assoc_response_frame *)header, network);
}
kfree(network);
kfree(ieee->assocresp_ies);
ieee->assocresp_ies = NULL;
ies = &assoc_resp->info_element[0].id;
ieee->assocresp_ies_len = (skb->data + skb->len) - ies;
ieee->assocresp_ies = kmemdup(ies,
ieee->assocresp_ies_len,
GFP_ATOMIC);
if (!ieee->assocresp_ies)
ieee->assocresp_ies_len = 0;
rtllib_associate_complete(ieee);
} else {
/* aid could not been allocated */
ieee->softmac_stats.rx_ass_err++;
netdev_info(ieee->dev,
"Association response status code 0x%x\n",
errcode);
if (ieee->asoc_retry_count < RT_ASOC_RETRY_LIMIT)
schedule_delayed_work(&ieee->associate_procedure_wq, 0);
else
rtllib_associate_abort(ieee);
}
}
return 0;
}
static void rtllib_rx_auth_resp(struct rtllib_device *ieee, struct sk_buff *skb)
{
int errcode;
u8 *challenge;
int chlen = 0;
bool support_nmode = true, half_support_nmode = false;
errcode = auth_parse(ieee->dev, skb, &challenge, &chlen);
if (errcode) {
ieee->softmac_stats.rx_auth_rs_err++;
netdev_info(ieee->dev,
"Authentication response status code %d", errcode);
rtllib_associate_abort(ieee);
return;
}
if (ieee->open_wep || !challenge) {
ieee->link_state = RTLLIB_ASSOCIATING_AUTHENTICATED;
ieee->softmac_stats.rx_auth_rs_ok++;
if (!(ieee->ht_info->iot_action & HT_IOT_ACT_PURE_N_MODE)) {
if (!ieee->get_nmode_support_by_sec_cfg(ieee->dev)) {
if (is_ht_half_nmode_aps(ieee)) {
support_nmode = true;
half_support_nmode = true;
} else {
support_nmode = false;
half_support_nmode = false;
}
}
}
/* Dummy wirless mode setting to avoid encryption issue */
if (support_nmode) {
ieee->set_wireless_mode(ieee->dev,
ieee->current_network.mode);
} else {
/*TODO*/
ieee->set_wireless_mode(ieee->dev, WIRELESS_MODE_G);
}
if ((ieee->current_network.mode == WIRELESS_MODE_N_24G) &&
half_support_nmode) {
netdev_info(ieee->dev, "======>enter half N mode\n");
ieee->half_wireless_n24g_mode = true;
} else {
ieee->half_wireless_n24g_mode = false;
}
rtllib_associate_step2(ieee);
} else {
rtllib_auth_challenge(ieee, challenge, chlen);
}
}
static inline int
rtllib_rx_auth(struct rtllib_device *ieee, struct sk_buff *skb,
struct rtllib_rx_stats *rx_stats)
{
if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) {
if (ieee->link_state == RTLLIB_ASSOCIATING_AUTHENTICATING &&
(ieee->iw_mode == IW_MODE_INFRA)) {
netdev_dbg(ieee->dev,
"Received authentication response");
rtllib_rx_auth_resp(ieee, skb);
}
}
return 0;
}
static inline int
rtllib_rx_deauth(struct rtllib_device *ieee, struct sk_buff *skb)
{
struct ieee80211_hdr_3addr *header = (struct ieee80211_hdr_3addr *)skb->data;
u16 frame_ctl;
if (memcmp(header->addr3, ieee->current_network.bssid, ETH_ALEN) != 0)
return 0;
/* FIXME for now repeat all the association procedure
* both for disassociation and deauthentication
*/
if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) &&
ieee->link_state == MAC80211_LINKED &&
(ieee->iw_mode == IW_MODE_INFRA)) {
frame_ctl = le16_to_cpu(header->frame_control);
netdev_info(ieee->dev,
"==========>received disassoc/deauth(%x) frame, reason code:%x\n",
WLAN_FC_GET_STYPE(frame_ctl),
((struct rtllib_disassoc *)skb->data)->reason);
ieee->link_state = RTLLIB_ASSOCIATING;
ieee->softmac_stats.reassoc++;
ieee->is_roaming = true;
ieee->link_detect_info.busy_traffic = false;
rtllib_disassociate(ieee);
remove_peer_ts(ieee, header->addr2);
if (!(ieee->rtllib_ap_sec_type(ieee) & (SEC_ALG_CCMP | SEC_ALG_TKIP)))
schedule_delayed_work(&ieee->associate_procedure_wq, 5);
}
return 0;
}
inline int rtllib_rx_frame_softmac(struct rtllib_device *ieee,
struct sk_buff *skb,
struct rtllib_rx_stats *rx_stats, u16 type,
u16 stype)
{
struct ieee80211_hdr_3addr *header = (struct ieee80211_hdr_3addr *)skb->data;
u16 frame_ctl;
if (!ieee->proto_started)
return 0;
frame_ctl = le16_to_cpu(header->frame_control);
switch (WLAN_FC_GET_STYPE(frame_ctl)) {
case IEEE80211_STYPE_ASSOC_RESP:
case IEEE80211_STYPE_REASSOC_RESP:
if (rtllib_rx_assoc_resp(ieee, skb, rx_stats) == 1)
return 1;
break;
case IEEE80211_STYPE_ASSOC_REQ:
case IEEE80211_STYPE_REASSOC_REQ:
break;
case IEEE80211_STYPE_AUTH:
rtllib_rx_auth(ieee, skb, rx_stats);
break;
case IEEE80211_STYPE_DISASSOC:
case IEEE80211_STYPE_DEAUTH:
rtllib_rx_deauth(ieee, skb);
break;
case IEEE80211_STYPE_ACTION:
rtllib_process_action(ieee, skb);
break;
default:
return -1;
}
return 0;
}
/* following are for a simpler TX queue management.
* Instead of using netif_[stop/wake]_queue the driver
* will use these two functions (plus a reset one), that
* will internally use the kernel netif_* and takes
* care of the ieee802.11 fragmentation.
* So the driver receives a fragment per time and might
* call the stop function when it wants to not
* have enough room to TX an entire packet.
* This might be useful if each fragment needs it's own
* descriptor, thus just keep a total free memory > than
* the max fragmentation threshold is not enough.. If the
* ieee802.11 stack passed a TXB struct then you need
* to keep N free descriptors where
* N = MAX_PACKET_SIZE / MIN_FRAG_TRESHOLD
* In this way you need just one and the 802.11 stack
* will take care of buffering fragments and pass them to
* the driver later, when it wakes the queue.
*/
void rtllib_softmac_xmit(struct rtllib_txb *txb, struct rtllib_device *ieee)
{
unsigned int queue_index = txb->queue_index;
unsigned long flags;
int i;
struct cb_desc *tcb_desc = NULL;
unsigned long queue_len = 0;
spin_lock_irqsave(&ieee->lock, flags);
/* called with 2nd param 0, no tx mgmt lock required */
rtllib_sta_wakeup(ieee, 0);
/* update the tx status */
tcb_desc = (struct cb_desc *)(txb->fragments[0]->cb +
MAX_DEV_ADDR_SIZE);
if (tcb_desc->multicast)
ieee->stats.multicast++;
/* if xmit available, just xmit it immediately, else just insert it to
* the wait queue
*/
for (i = 0; i < txb->nr_frags; i++) {
queue_len = skb_queue_len(&ieee->skb_waitq[queue_index]);
if ((queue_len != 0) ||
(!ieee->check_nic_enough_desc(ieee->dev, queue_index)) ||
(ieee->queue_stop)) {
/* insert the skb packet to the wait queue
* as for the completion function, it does not need
* to check it any more.
*/
if (queue_len < 200)
skb_queue_tail(&ieee->skb_waitq[queue_index],
txb->fragments[i]);
else
kfree_skb(txb->fragments[i]);
} else {
ieee->softmac_data_hard_start_xmit(txb->fragments[i],
ieee->dev, ieee->rate);
}
}
rtllib_txb_free(txb);
spin_unlock_irqrestore(&ieee->lock, flags);
}
void rtllib_reset_queue(struct rtllib_device *ieee)
{
unsigned long flags;
spin_lock_irqsave(&ieee->lock, flags);
init_mgmt_queue(ieee);
if (ieee->tx_pending.txb) {
rtllib_txb_free(ieee->tx_pending.txb);
ieee->tx_pending.txb = NULL;
}
ieee->queue_stop = 0;
spin_unlock_irqrestore(&ieee->lock, flags);
}
EXPORT_SYMBOL(rtllib_reset_queue);
void rtllib_stop_all_queues(struct rtllib_device *ieee)
{
unsigned int i;
for (i = 0; i < ieee->dev->num_tx_queues; i++)
txq_trans_cond_update(netdev_get_tx_queue(ieee->dev, i));
netif_tx_stop_all_queues(ieee->dev);
}
void rtllib_wake_all_queues(struct rtllib_device *ieee)
{
netif_tx_wake_all_queues(ieee->dev);
}
/* this is called only in user context, with wx_mutex held */
static void rtllib_start_bss(struct rtllib_device *ieee)
{
unsigned long flags;
/* check if we have already found the net we
* are interested in (if any).
* if not (we are disassociated and we are not
* in associating / authenticating phase) start the background scanning.
*/
rtllib_softmac_check_all_nets(ieee);
/* ensure no-one start an associating process (thus setting
* the ieee->link_state to rtllib_ASSOCIATING) while we
* have just checked it and we are going to enable scan.
* The rtllib_new_net function is always called with
* lock held (from both rtllib_softmac_check_all_nets and
* the rx path), so we cannot be in the middle of such function
*/
spin_lock_irqsave(&ieee->lock, flags);
if (ieee->link_state == MAC80211_NOLINK)
rtllib_start_scan(ieee);
spin_unlock_irqrestore(&ieee->lock, flags);
}
static void rtllib_link_change_wq(void *data)
{
struct rtllib_device *ieee = container_of_dwork_rsl(data,
struct rtllib_device, link_change_wq);
ieee->link_change(ieee->dev);
}
/* called only in userspace context */
void rtllib_disassociate(struct rtllib_device *ieee)
{
netif_carrier_off(ieee->dev);
if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)
rtllib_reset_queue(ieee);
ieee->link_state = MAC80211_NOLINK;
ieee->is_set_key = false;
ieee->wap_set = 0;
schedule_delayed_work(&ieee->link_change_wq, 0);
notify_wx_assoc_event(ieee);
}
static void rtllib_associate_retry_wq(void *data)
{
struct rtllib_device *ieee = container_of_dwork_rsl(data,
struct rtllib_device, associate_retry_wq);
unsigned long flags;
mutex_lock(&ieee->wx_mutex);
if (!ieee->proto_started)
goto exit;
if (ieee->link_state != RTLLIB_ASSOCIATING_RETRY)
goto exit;
/* until we do not set the state to MAC80211_NOLINK
* there are no possibility to have someone else trying
* to start an association procedure (we get here with
* ieee->link_state = RTLLIB_ASSOCIATING).
* When we set the state to MAC80211_NOLINK it is possible
* that the RX path run an attempt to associate, but
* both rtllib_softmac_check_all_nets and the
* RX path works with ieee->lock held so there are no
* problems. If we are still disassociated then start a scan.
* the lock here is necessary to ensure no one try to start
* an association procedure when we have just checked the
* state and we are going to start the scan.
*/
ieee->beinretry = true;
ieee->link_state = MAC80211_NOLINK;
rtllib_softmac_check_all_nets(ieee);
spin_lock_irqsave(&ieee->lock, flags);
if (ieee->link_state == MAC80211_NOLINK)
rtllib_start_scan(ieee);
spin_unlock_irqrestore(&ieee->lock, flags);
ieee->beinretry = false;
exit:
mutex_unlock(&ieee->wx_mutex);
}
void rtllib_softmac_stop_protocol(struct rtllib_device *ieee)
{
rtllib_stop_scan_syncro(ieee);
mutex_lock(&ieee->wx_mutex);
rtllib_stop_protocol(ieee);
mutex_unlock(&ieee->wx_mutex);
}
EXPORT_SYMBOL(rtllib_softmac_stop_protocol);
void rtllib_stop_protocol(struct rtllib_device *ieee)
{
if (!ieee->proto_started)
return;
ieee->proto_started = 0;
ieee->proto_stoppping = 1;
ieee->rtllib_ips_leave(ieee->dev);
del_timer_sync(&ieee->associate_timer);
mutex_unlock(&ieee->wx_mutex);
cancel_delayed_work_sync(&ieee->associate_retry_wq);
mutex_lock(&ieee->wx_mutex);
cancel_delayed_work_sync(&ieee->link_change_wq);
rtllib_stop_scan(ieee);
if (ieee->link_state <= RTLLIB_ASSOCIATING_AUTHENTICATED)
ieee->link_state = MAC80211_NOLINK;
if (ieee->link_state == MAC80211_LINKED) {
if (ieee->iw_mode == IW_MODE_INFRA)
send_disassociation(ieee, 1, WLAN_REASON_DEAUTH_LEAVING);
rtllib_disassociate(ieee);
}
remove_all_ts(ieee);
ieee->proto_stoppping = 0;
kfree(ieee->assocreq_ies);
ieee->assocreq_ies = NULL;
ieee->assocreq_ies_len = 0;
kfree(ieee->assocresp_ies);
ieee->assocresp_ies = NULL;
ieee->assocresp_ies_len = 0;
}
void rtllib_softmac_start_protocol(struct rtllib_device *ieee)
{
mutex_lock(&ieee->wx_mutex);
rtllib_start_protocol(ieee);
mutex_unlock(&ieee->wx_mutex);
}
EXPORT_SYMBOL(rtllib_softmac_start_protocol);
void rtllib_start_protocol(struct rtllib_device *ieee)
{
short ch = 0;
int i = 0;
if (ieee->proto_started)
return;
ieee->proto_started = 1;
if (ieee->current_network.channel == 0) {
do {
ch++;
if (ch > MAX_CHANNEL_NUMBER)
return; /* no channel found */
} while (!ieee->active_channel_map[ch]);
ieee->current_network.channel = ch;
}
if (ieee->current_network.beacon_interval == 0)
ieee->current_network.beacon_interval = 100;
for (i = 0; i < 17; i++) {
ieee->last_rxseq_num[i] = -1;
ieee->last_rxfrag_num[i] = -1;
ieee->last_packet_time[i] = 0;
}
ieee->wmm_acm = 0;
/* if the user set the MAC of the ad-hoc cell and then
* switch to managed mode, shall we make sure that association
* attempts does not fail just because the user provide the essid
* and the nic is still checking for the AP MAC ??
*/
switch (ieee->iw_mode) {
case IW_MODE_INFRA:
rtllib_start_bss(ieee);
break;
}
}
int rtllib_softmac_init(struct rtllib_device *ieee)
{
int i;
memset(&ieee->current_network, 0, sizeof(struct rtllib_network));
ieee->link_state = MAC80211_NOLINK;
for (i = 0; i < 5; i++)
ieee->seq_ctrl[i] = 0;
ieee->link_detect_info.slot_index = 0;
ieee->link_detect_info.slot_num = 2;
ieee->link_detect_info.num_recv_bcn_in_period = 0;
ieee->link_detect_info.num_recv_data_in_period = 0;
ieee->link_detect_info.num_tx_ok_in_period = 0;
ieee->link_detect_info.num_rx_ok_in_period = 0;
ieee->link_detect_info.num_rx_unicast_ok_in_period = 0;
ieee->is_aggregate_frame = false;
ieee->assoc_id = 0;
ieee->queue_stop = 0;
ieee->scanning_continue = 0;
ieee->softmac_features = 0;
ieee->wap_set = 0;
ieee->ssid_set = 0;
ieee->proto_started = 0;
ieee->proto_stoppping = 0;
ieee->basic_rate = RTLLIB_DEFAULT_BASIC_RATE;
ieee->rate = 22;
ieee->ps = RTLLIB_PS_DISABLED;
ieee->sta_sleep = LPS_IS_WAKE;
ieee->reg_dot11ht_oper_rate_set[0] = 0xff;
ieee->reg_dot11ht_oper_rate_set[1] = 0xff;
ieee->reg_dot11ht_oper_rate_set[4] = 0x01;
ieee->reg_dot11tx_ht_oper_rate_set[0] = 0xff;
ieee->reg_dot11tx_ht_oper_rate_set[1] = 0xff;
ieee->reg_dot11tx_ht_oper_rate_set[4] = 0x01;
ieee->first_ie_in_scan = false;
ieee->actscanning = false;
ieee->beinretry = false;
ieee->is_set_key = false;
init_mgmt_queue(ieee);
ieee->tx_pending.txb = NULL;
timer_setup(&ieee->associate_timer, rtllib_associate_abort_cb, 0);
INIT_DELAYED_WORK(&ieee->link_change_wq, (void *)rtllib_link_change_wq);
INIT_WORK(&ieee->associate_complete_wq, (void *)rtllib_associate_complete_wq);
INIT_DELAYED_WORK(&ieee->associate_procedure_wq, (void *)rtllib_associate_procedure_wq);
INIT_DELAYED_WORK(&ieee->softmac_scan_wq, (void *)rtllib_softmac_scan_wq);
INIT_DELAYED_WORK(&ieee->associate_retry_wq, (void *)rtllib_associate_retry_wq);
INIT_WORK(&ieee->wx_sync_scan_wq, (void *)rtllib_wx_sync_scan_wq);
mutex_init(&ieee->wx_mutex);
mutex_init(&ieee->scan_mutex);
mutex_init(&ieee->ips_mutex);
spin_lock_init(&ieee->mgmt_tx_lock);
spin_lock_init(&ieee->beacon_lock);
INIT_WORK(&ieee->ps_task, rtllib_sta_ps);
return 0;
}
void rtllib_softmac_free(struct rtllib_device *ieee)
{
del_timer_sync(&ieee->associate_timer);
cancel_delayed_work_sync(&ieee->associate_retry_wq);
cancel_delayed_work_sync(&ieee->associate_procedure_wq);
cancel_delayed_work_sync(&ieee->softmac_scan_wq);
cancel_delayed_work_sync(&ieee->hw_wakeup_wq);
cancel_delayed_work_sync(&ieee->hw_sleep_wq);
cancel_delayed_work_sync(&ieee->link_change_wq);
cancel_work_sync(&ieee->associate_complete_wq);
cancel_work_sync(&ieee->ips_leave_wq);
cancel_work_sync(&ieee->wx_sync_scan_wq);
cancel_work_sync(&ieee->ps_task);
}
static inline struct sk_buff *
rtllib_disauth_skb(struct rtllib_network *beacon,
struct rtllib_device *ieee, u16 rsn)
{
struct sk_buff *skb;
struct rtllib_disauth *disauth;
int len = sizeof(struct rtllib_disauth) + ieee->tx_headroom;
skb = dev_alloc_skb(len);
if (!skb)
return NULL;
skb_reserve(skb, ieee->tx_headroom);
disauth = skb_put(skb, sizeof(struct rtllib_disauth));
disauth->header.frame_control = cpu_to_le16(IEEE80211_STYPE_DEAUTH);
disauth->header.duration_id = 0;
ether_addr_copy(disauth->header.addr1, beacon->bssid);
ether_addr_copy(disauth->header.addr2, ieee->dev->dev_addr);
ether_addr_copy(disauth->header.addr3, beacon->bssid);
disauth->reason = cpu_to_le16(rsn);
return skb;
}
static inline struct sk_buff *
rtllib_disassociate_skb(struct rtllib_network *beacon,
struct rtllib_device *ieee, u16 rsn)
{
struct sk_buff *skb;
struct rtllib_disassoc *disass;
int len = sizeof(struct rtllib_disassoc) + ieee->tx_headroom;
skb = dev_alloc_skb(len);
if (!skb)
return NULL;
skb_reserve(skb, ieee->tx_headroom);
disass = skb_put(skb, sizeof(struct rtllib_disassoc));
disass->header.frame_control = cpu_to_le16(IEEE80211_STYPE_DISASSOC);
disass->header.duration_id = 0;
ether_addr_copy(disass->header.addr1, beacon->bssid);
ether_addr_copy(disass->header.addr2, ieee->dev->dev_addr);
ether_addr_copy(disass->header.addr3, beacon->bssid);
disass->reason = cpu_to_le16(rsn);
return skb;
}
void send_disassociation(struct rtllib_device *ieee, bool deauth, u16 rsn)
{
struct rtllib_network *beacon = &ieee->current_network;
struct sk_buff *skb;
if (deauth)
skb = rtllib_disauth_skb(beacon, ieee, rsn);
else
skb = rtllib_disassociate_skb(beacon, ieee, rsn);
if (skb)
softmac_mgmt_xmit(skb, ieee);
}
u8 rtllib_ap_sec_type(struct rtllib_device *ieee)
{
static u8 ccmp_ie[4] = {0x00, 0x50, 0xf2, 0x04};
static u8 ccmp_rsn_ie[4] = {0x00, 0x0f, 0xac, 0x04};
int wpa_ie_len = ieee->wpa_ie_len;
struct lib80211_crypt_data *crypt;
int encrypt;
crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx];
encrypt = (ieee->current_network.capability & WLAN_CAPABILITY_PRIVACY)
|| (crypt && crypt->ops && (strcmp(crypt->ops->name, "R-WEP") == 0));
/* simply judge */
if (encrypt && (wpa_ie_len == 0)) {
return SEC_ALG_WEP;
} else if ((wpa_ie_len != 0)) {
if (((ieee->wpa_ie[0] == 0xdd) &&
(!memcmp(&ieee->wpa_ie[14], ccmp_ie, 4))) ||
((ieee->wpa_ie[0] == 0x30) &&
(!memcmp(&ieee->wpa_ie[10], ccmp_rsn_ie, 4))))
return SEC_ALG_CCMP;
else
return SEC_ALG_TKIP;
} else {
return SEC_ALG_NONE;
}
}
static void rtllib_mlme_disassociate_request(struct rtllib_device *rtllib,
u8 *addr, u8 rsn)
{
u8 i;
u8 op_mode;
remove_peer_ts(rtllib, addr);
if (memcmp(rtllib->current_network.bssid, addr, 6) == 0) {
rtllib->link_state = MAC80211_NOLINK;
for (i = 0; i < 6; i++)
rtllib->current_network.bssid[i] = 0x22;
op_mode = RT_OP_MODE_NO_LINK;
rtllib->op_mode = RT_OP_MODE_NO_LINK;
rtllib->set_hw_reg_handler(rtllib->dev, HW_VAR_MEDIA_STATUS,
(u8 *)(&op_mode));
rtllib_disassociate(rtllib);
rtllib->set_hw_reg_handler(rtllib->dev, HW_VAR_BSSID,
rtllib->current_network.bssid);
}
}
static void rtllib_mgnt_disconnect_ap(struct rtllib_device *rtllib, u8 rsn)
{
bool filter_out_nonassociated_bssid = false;
filter_out_nonassociated_bssid = false;
rtllib->set_hw_reg_handler(rtllib->dev, HW_VAR_CECHK_BSSID,
(u8 *)(&filter_out_nonassociated_bssid));
rtllib_mlme_disassociate_request(rtllib, rtllib->current_network.bssid,
rsn);
rtllib->link_state = MAC80211_NOLINK;
}
bool rtllib_mgnt_disconnect(struct rtllib_device *rtllib, u8 rsn)
{
if (rtllib->ps != RTLLIB_PS_DISABLED)
rtllib->sta_wake_up(rtllib->dev);
if (rtllib->link_state == MAC80211_LINKED) {
if (rtllib->iw_mode == IW_MODE_INFRA)
rtllib_mgnt_disconnect_ap(rtllib, rsn);
}
return true;
}
EXPORT_SYMBOL(rtllib_mgnt_disconnect);
void notify_wx_assoc_event(struct rtllib_device *ieee)
{
union iwreq_data wrqu;
if (ieee->cannot_notify)
return;
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
if (ieee->link_state == MAC80211_LINKED) {
memcpy(wrqu.ap_addr.sa_data, ieee->current_network.bssid,
ETH_ALEN);
} else {
netdev_info(ieee->dev, "%s(): Tell user space disconnected\n",
__func__);
eth_zero_addr(wrqu.ap_addr.sa_data);
}
wireless_send_event(ieee->dev, SIOCGIWAP, &wrqu, NULL);
}
EXPORT_SYMBOL(notify_wx_assoc_event);
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