// 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.
*
* Some pieces of code might be stolen from ipw2100 driver
* copyright of who own it's copyright ;-)
*
* PS wx handler mostly stolen from hostap, copyright who
* own it's copyright ;-)
*/
#include <linux/etherdevice.h>
#include "rtllib.h"
int rtllib_wx_set_freq(struct rtllib_device *ieee, struct iw_request_info *a,
union iwreq_data *wrqu, char *b)
{
int ret;
struct iw_freq *fwrq = &wrqu->freq;
mutex_lock(&ieee->wx_mutex);
if (ieee->iw_mode == IW_MODE_INFRA) {
ret = 0;
goto out;
}
/* if setting by freq convert to channel */
if (fwrq->e == 1) {
if ((fwrq->m >= (int)2.412e8 &&
fwrq->m <= (int)2.487e8)) {
fwrq->m = ieee80211_freq_khz_to_channel(fwrq->m / 100);
fwrq->e = 0;
}
}
if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1) {
ret = -EOPNOTSUPP;
goto out;
} else { /* Set the channel */
if (ieee->active_channel_map[fwrq->m] != 1) {
ret = -EINVAL;
goto out;
}
ieee->current_network.channel = fwrq->m;
ieee->set_chan(ieee->dev, ieee->current_network.channel);
}
ret = 0;
out:
mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(rtllib_wx_set_freq);
int rtllib_wx_get_freq(struct rtllib_device *ieee,
struct iw_request_info *a,
union iwreq_data *wrqu, char *b)
{
struct iw_freq *fwrq = &wrqu->freq;
if (ieee->current_network.channel == 0)
return -1;
fwrq->m = ieee80211_channel_to_freq_khz(ieee->current_network.channel,
NL80211_BAND_2GHZ) * 100;
fwrq->e = 1;
return 0;
}
EXPORT_SYMBOL(rtllib_wx_get_freq);
int rtllib_wx_get_wap(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
unsigned long flags;
wrqu->ap_addr.sa_family = ARPHRD_ETHER;
if (ieee->iw_mode == IW_MODE_MONITOR)
return -1;
/* We want avoid to give to the user inconsistent infos*/
spin_lock_irqsave(&ieee->lock, flags);
if (ieee->link_state != MAC80211_LINKED &&
ieee->link_state != MAC80211_LINKED_SCANNING &&
ieee->wap_set == 0)
eth_zero_addr(wrqu->ap_addr.sa_data);
else
memcpy(wrqu->ap_addr.sa_data,
ieee->current_network.bssid, ETH_ALEN);
spin_unlock_irqrestore(&ieee->lock, flags);
return 0;
}
EXPORT_SYMBOL(rtllib_wx_get_wap);
int rtllib_wx_set_wap(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *awrq,
char *extra)
{
int ret = 0;
unsigned long flags;
short ifup = ieee->proto_started;
struct sockaddr *temp = (struct sockaddr *)awrq;
rtllib_stop_scan_syncro(ieee);
mutex_lock(&ieee->wx_mutex);
/* use ifconfig hw ether */
if (temp->sa_family != ARPHRD_ETHER) {
ret = -EINVAL;
goto out;
}
if (is_zero_ether_addr(temp->sa_data)) {
spin_lock_irqsave(&ieee->lock, flags);
ether_addr_copy(ieee->current_network.bssid, temp->sa_data);
ieee->wap_set = 0;
spin_unlock_irqrestore(&ieee->lock, flags);
ret = -1;
goto out;
}
if (ifup)
rtllib_stop_protocol(ieee);
/* just to avoid to give inconsistent infos in the
* get wx method. not really needed otherwise
*/
spin_lock_irqsave(&ieee->lock, flags);
ieee->cannot_notify = false;
ether_addr_copy(ieee->current_network.bssid, temp->sa_data);
ieee->wap_set = !is_zero_ether_addr(temp->sa_data);
spin_unlock_irqrestore(&ieee->lock, flags);
if (ifup)
rtllib_start_protocol(ieee);
out:
mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(rtllib_wx_set_wap);
int rtllib_wx_get_essid(struct rtllib_device *ieee, struct iw_request_info *a,
union iwreq_data *wrqu, char *b)
{
int len, ret = 0;
unsigned long flags;
if (ieee->iw_mode == IW_MODE_MONITOR)
return -1;
/* We want avoid to give to the user inconsistent infos*/
spin_lock_irqsave(&ieee->lock, flags);
if (ieee->current_network.ssid[0] == '\0' ||
ieee->current_network.ssid_len == 0) {
ret = -1;
goto out;
}
if (ieee->link_state != MAC80211_LINKED &&
ieee->link_state != MAC80211_LINKED_SCANNING &&
ieee->ssid_set == 0) {
ret = -1;
goto out;
}
len = ieee->current_network.ssid_len;
wrqu->essid.length = len;
strncpy(b, ieee->current_network.ssid, len);
wrqu->essid.flags = 1;
out:
spin_unlock_irqrestore(&ieee->lock, flags);
return ret;
}
EXPORT_SYMBOL(rtllib_wx_get_essid);
int rtllib_wx_set_rate(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
u32 target_rate = wrqu->bitrate.value;
ieee->rate = target_rate / 100000;
return 0;
}
EXPORT_SYMBOL(rtllib_wx_set_rate);
int rtllib_wx_get_rate(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
u32 tmp_rate;
tmp_rate = tx_count_to_data_rate(ieee,
ieee->softmac_stats.CurrentShowTxate);
wrqu->bitrate.value = tmp_rate * 500000;
return 0;
}
EXPORT_SYMBOL(rtllib_wx_get_rate);
int rtllib_wx_set_rts(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
if (wrqu->rts.disabled || !wrqu->rts.fixed) {
ieee->rts = DEFAULT_RTS_THRESHOLD;
} else {
if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
wrqu->rts.value > MAX_RTS_THRESHOLD)
return -EINVAL;
ieee->rts = wrqu->rts.value;
}
return 0;
}
EXPORT_SYMBOL(rtllib_wx_set_rts);
int rtllib_wx_get_rts(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
wrqu->rts.value = ieee->rts;
wrqu->rts.fixed = 0; /* no auto select */
wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
return 0;
}
EXPORT_SYMBOL(rtllib_wx_get_rts);
int rtllib_wx_set_mode(struct rtllib_device *ieee, struct iw_request_info *a,
union iwreq_data *wrqu, char *b)
{
int set_mode_status = 0;
rtllib_stop_scan_syncro(ieee);
mutex_lock(&ieee->wx_mutex);
switch (wrqu->mode) {
case IW_MODE_MONITOR:
case IW_MODE_INFRA:
break;
case IW_MODE_AUTO:
wrqu->mode = IW_MODE_INFRA;
break;
default:
set_mode_status = -EINVAL;
goto out;
}
if (wrqu->mode == ieee->iw_mode)
goto out;
if (wrqu->mode == IW_MODE_MONITOR) {
ieee->dev->type = ARPHRD_IEEE80211;
rtllib_enable_net_monitor_mode(ieee->dev, false);
} else {
ieee->dev->type = ARPHRD_ETHER;
if (ieee->iw_mode == IW_MODE_MONITOR)
rtllib_disable_net_monitor_mode(ieee->dev, false);
}
if (!ieee->proto_started) {
ieee->iw_mode = wrqu->mode;
} else {
rtllib_stop_protocol(ieee);
ieee->iw_mode = wrqu->mode;
rtllib_start_protocol(ieee);
}
out:
mutex_unlock(&ieee->wx_mutex);
return set_mode_status;
}
EXPORT_SYMBOL(rtllib_wx_set_mode);
void rtllib_wx_sync_scan_wq(void *data)
{
struct rtllib_device *ieee = container_of(data, struct rtllib_device, wx_sync_scan_wq);
short chan;
enum ht_extchnl_offset chan_offset = 0;
enum ht_channel_width bandwidth = 0;
int b40M = 0;
mutex_lock(&ieee->wx_mutex);
if (!(ieee->softmac_features & IEEE_SOFTMAC_SCAN)) {
rtllib_start_scan_syncro(ieee);
goto out;
}
chan = ieee->current_network.channel;
ieee->leisure_ps_leave(ieee->dev);
/* notify AP to be in PS mode */
rtllib_sta_ps_send_null_frame(ieee, 1);
rtllib_sta_ps_send_null_frame(ieee, 1);
rtllib_stop_all_queues(ieee);
ieee->link_state = MAC80211_LINKED_SCANNING;
ieee->link_change(ieee->dev);
/* wait for ps packet to be kicked out successfully */
msleep(50);
ieee->scan_operation_backup_handler(ieee->dev, SCAN_OPT_BACKUP);
if (ieee->ht_info->current_ht_support && ieee->ht_info->enable_ht &&
ieee->ht_info->cur_bw_40mhz) {
b40M = 1;
chan_offset = ieee->ht_info->cur_sta_ext_chnl_offset;
bandwidth = (enum ht_channel_width)ieee->ht_info->cur_bw_40mhz;
ieee->set_bw_mode_handler(ieee->dev, HT_CHANNEL_WIDTH_20,
HT_EXTCHNL_OFFSET_NO_EXT);
}
rtllib_start_scan_syncro(ieee);
if (b40M) {
if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
ieee->set_chan(ieee->dev, chan + 2);
else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
ieee->set_chan(ieee->dev, chan - 2);
else
ieee->set_chan(ieee->dev, chan);
ieee->set_bw_mode_handler(ieee->dev, bandwidth, chan_offset);
} else {
ieee->set_chan(ieee->dev, chan);
}
ieee->scan_operation_backup_handler(ieee->dev, SCAN_OPT_RESTORE);
ieee->link_state = MAC80211_LINKED;
ieee->link_change(ieee->dev);
/* Notify AP that I wake up again */
rtllib_sta_ps_send_null_frame(ieee, 0);
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;
}
rtllib_wake_all_queues(ieee);
out:
mutex_unlock(&ieee->wx_mutex);
}
int rtllib_wx_set_scan(struct rtllib_device *ieee, struct iw_request_info *a,
union iwreq_data *wrqu, char *b)
{
int ret = 0;
if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)) {
ret = -1;
goto out;
}
if (ieee->link_state == MAC80211_LINKED) {
schedule_work(&ieee->wx_sync_scan_wq);
/* intentionally forget to up sem */
return 0;
}
out:
return ret;
}
EXPORT_SYMBOL(rtllib_wx_set_scan);
int rtllib_wx_set_essid(struct rtllib_device *ieee,
struct iw_request_info *a,
union iwreq_data *wrqu, char *extra)
{
int ret = 0, len;
short proto_started;
unsigned long flags;
rtllib_stop_scan_syncro(ieee);
mutex_lock(&ieee->wx_mutex);
proto_started = ieee->proto_started;
len = min_t(__u16, wrqu->essid.length, IW_ESSID_MAX_SIZE);
if (ieee->iw_mode == IW_MODE_MONITOR) {
ret = -1;
goto out;
}
if (proto_started)
rtllib_stop_protocol(ieee);
/* this is just to be sure that the GET wx callback
* has consistent infos. not needed otherwise
*/
spin_lock_irqsave(&ieee->lock, flags);
if (wrqu->essid.flags && wrqu->essid.length) {
strncpy(ieee->current_network.ssid, extra, len);
ieee->current_network.ssid_len = len;
ieee->cannot_notify = false;
ieee->ssid_set = 1;
} else {
ieee->ssid_set = 0;
ieee->current_network.ssid[0] = '\0';
ieee->current_network.ssid_len = 0;
}
spin_unlock_irqrestore(&ieee->lock, flags);
if (proto_started)
rtllib_start_protocol(ieee);
out:
mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(rtllib_wx_set_essid);
int rtllib_wx_get_mode(struct rtllib_device *ieee, struct iw_request_info *a,
union iwreq_data *wrqu, char *b)
{
wrqu->mode = ieee->iw_mode;
return 0;
}
EXPORT_SYMBOL(rtllib_wx_get_mode);
int rtllib_wx_get_name(struct rtllib_device *ieee, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
const char *n = ieee->mode & (WIRELESS_MODE_N_24G) ? "n" : "";
scnprintf(wrqu->name, sizeof(wrqu->name), "802.11bg%s", n);
return 0;
}
EXPORT_SYMBOL(rtllib_wx_get_name);
/* this is mostly stolen from hostap */
int rtllib_wx_set_power(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
int ret = 0;
if ((!ieee->sta_wake_up) ||
(!ieee->enter_sleep_state) ||
(!ieee->ps_is_queue_empty)) {
netdev_warn(ieee->dev,
"%s(): PS mode is tried to be use but driver missed a callback\n",
__func__);
return -1;
}
mutex_lock(&ieee->wx_mutex);
if (wrqu->power.disabled) {
ieee->ps = RTLLIB_PS_DISABLED;
goto exit;
}
if (wrqu->power.flags & IW_POWER_TIMEOUT)
ieee->ps_timeout = wrqu->power.value / 1000;
if (wrqu->power.flags & IW_POWER_PERIOD)
ieee->ps_period = wrqu->power.value / 1000;
switch (wrqu->power.flags & IW_POWER_MODE) {
case IW_POWER_UNICAST_R:
ieee->ps = RTLLIB_PS_UNICAST;
break;
case IW_POWER_MULTICAST_R:
ieee->ps = RTLLIB_PS_MBCAST;
break;
case IW_POWER_ALL_R:
ieee->ps = RTLLIB_PS_UNICAST | RTLLIB_PS_MBCAST;
break;
case IW_POWER_ON:
break;
default:
ret = -EINVAL;
goto exit;
}
exit:
mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(rtllib_wx_set_power);
/* this is stolen from hostap */
int rtllib_wx_get_power(struct rtllib_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
mutex_lock(&ieee->wx_mutex);
if (ieee->ps == RTLLIB_PS_DISABLED) {
wrqu->power.disabled = 1;
goto exit;
}
wrqu->power.disabled = 0;
if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
wrqu->power.flags = IW_POWER_TIMEOUT;
wrqu->power.value = ieee->ps_timeout * 1000;
} else {
wrqu->power.flags = IW_POWER_PERIOD;
wrqu->power.value = ieee->ps_period * 1000;
}
if ((ieee->ps & (RTLLIB_PS_MBCAST | RTLLIB_PS_UNICAST)) ==
(RTLLIB_PS_MBCAST | RTLLIB_PS_UNICAST))
wrqu->power.flags |= IW_POWER_ALL_R;
else if (ieee->ps & RTLLIB_PS_MBCAST)
wrqu->power.flags |= IW_POWER_MULTICAST_R;
else
wrqu->power.flags |= IW_POWER_UNICAST_R;
exit:
mutex_unlock(&ieee->wx_mutex);
return 0;
}
EXPORT_SYMBOL(rtllib_wx_get_power);
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