https://github.com/torvalds/linux
Tip revision: 1c7fc5cbc33980acd13d668f1c8f0313d6ae9fd8 authored by Linus Torvalds on 13 January 2019, 22:41:12 UTC
Linux 5.0-rc2
Linux 5.0-rc2
Tip revision: 1c7fc5c
cfg80211.c
// SPDX-License-Identifier: GPL-2.0
/* cfg80211 Interface for prism2_usb module */
#include "hfa384x.h"
#include "prism2mgmt.h"
/* Prism2 channel/frequency/bitrate declarations */
static const struct ieee80211_channel prism2_channels[] = {
{ .center_freq = 2412 },
{ .center_freq = 2417 },
{ .center_freq = 2422 },
{ .center_freq = 2427 },
{ .center_freq = 2432 },
{ .center_freq = 2437 },
{ .center_freq = 2442 },
{ .center_freq = 2447 },
{ .center_freq = 2452 },
{ .center_freq = 2457 },
{ .center_freq = 2462 },
{ .center_freq = 2467 },
{ .center_freq = 2472 },
{ .center_freq = 2484 },
};
static const struct ieee80211_rate prism2_rates[] = {
{ .bitrate = 10 },
{ .bitrate = 20 },
{ .bitrate = 55 },
{ .bitrate = 110 }
};
#define PRISM2_NUM_CIPHER_SUITES 2
static const u32 prism2_cipher_suites[PRISM2_NUM_CIPHER_SUITES] = {
WLAN_CIPHER_SUITE_WEP40,
WLAN_CIPHER_SUITE_WEP104
};
/* prism2 device private data */
struct prism2_wiphy_private {
struct wlandevice *wlandev;
struct ieee80211_supported_band band;
struct ieee80211_channel channels[ARRAY_SIZE(prism2_channels)];
struct ieee80211_rate rates[ARRAY_SIZE(prism2_rates)];
struct cfg80211_scan_request *scan_request;
};
static const void * const prism2_wiphy_privid = &prism2_wiphy_privid;
/* Helper Functions */
static int prism2_result2err(int prism2_result)
{
int err = 0;
switch (prism2_result) {
case P80211ENUM_resultcode_invalid_parameters:
err = -EINVAL;
break;
case P80211ENUM_resultcode_implementation_failure:
err = -EIO;
break;
case P80211ENUM_resultcode_not_supported:
err = -EOPNOTSUPP;
break;
default:
err = 0;
break;
}
return err;
}
static int prism2_domibset_uint32(struct wlandevice *wlandev, u32 did, u32 data)
{
struct p80211msg_dot11req_mibset msg;
struct p80211item_uint32 *mibitem =
(struct p80211item_uint32 *)&msg.mibattribute.data;
msg.msgcode = DIDMSG_DOT11REQ_MIBSET;
mibitem->did = did;
mibitem->data = data;
return p80211req_dorequest(wlandev, (u8 *)&msg);
}
static int prism2_domibset_pstr32(struct wlandevice *wlandev,
u32 did, u8 len, const u8 *data)
{
struct p80211msg_dot11req_mibset msg;
struct p80211item_pstr32 *mibitem =
(struct p80211item_pstr32 *)&msg.mibattribute.data;
msg.msgcode = DIDMSG_DOT11REQ_MIBSET;
mibitem->did = did;
mibitem->data.len = len;
memcpy(mibitem->data.data, data, len);
return p80211req_dorequest(wlandev, (u8 *)&msg);
}
/* The interface functions, called by the cfg80211 layer */
static int prism2_change_virtual_intf(struct wiphy *wiphy,
struct net_device *dev,
enum nl80211_iftype type,
struct vif_params *params)
{
struct wlandevice *wlandev = dev->ml_priv;
u32 data;
int result;
int err = 0;
switch (type) {
case NL80211_IFTYPE_ADHOC:
if (wlandev->macmode == WLAN_MACMODE_IBSS_STA)
goto exit;
wlandev->macmode = WLAN_MACMODE_IBSS_STA;
data = 0;
break;
case NL80211_IFTYPE_STATION:
if (wlandev->macmode == WLAN_MACMODE_ESS_STA)
goto exit;
wlandev->macmode = WLAN_MACMODE_ESS_STA;
data = 1;
break;
default:
netdev_warn(dev, "Operation mode: %d not support\n", type);
return -EOPNOTSUPP;
}
/* Set Operation mode to the PORT TYPE RID */
result = prism2_domibset_uint32(wlandev,
DIDMIB_P2_STATIC_CNFPORTTYPE,
data);
if (result)
err = -EFAULT;
dev->ieee80211_ptr->iftype = type;
exit:
return err;
}
static int prism2_add_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_index, bool pairwise, const u8 *mac_addr,
struct key_params *params)
{
struct wlandevice *wlandev = dev->ml_priv;
u32 did;
if (key_index >= NUM_WEPKEYS)
return -EINVAL;
if (params->cipher != WLAN_CIPHER_SUITE_WEP40 &&
params->cipher != WLAN_CIPHER_SUITE_WEP104) {
pr_debug("Unsupported cipher suite\n");
return -EFAULT;
}
if (prism2_domibset_uint32(wlandev,
DIDMIB_DOT11SMT_PRIVACYTABLE_WEPDEFAULTKEYID,
key_index))
return -EFAULT;
/* send key to driver */
did = didmib_dot11smt_wepdefaultkeystable_key(key_index + 1);
if (prism2_domibset_pstr32(wlandev, did, params->key_len, params->key))
return -EFAULT;
return 0;
}
static int prism2_get_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_index, bool pairwise,
const u8 *mac_addr, void *cookie,
void (*callback)(void *cookie, struct key_params*))
{
struct wlandevice *wlandev = dev->ml_priv;
struct key_params params;
int len;
if (key_index >= NUM_WEPKEYS)
return -EINVAL;
len = wlandev->wep_keylens[key_index];
memset(¶ms, 0, sizeof(params));
if (len == 13)
params.cipher = WLAN_CIPHER_SUITE_WEP104;
else if (len == 5)
params.cipher = WLAN_CIPHER_SUITE_WEP104;
else
return -ENOENT;
params.key_len = len;
params.key = wlandev->wep_keys[key_index];
params.seq_len = 0;
callback(cookie, ¶ms);
return 0;
}
static int prism2_del_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_index, bool pairwise, const u8 *mac_addr)
{
struct wlandevice *wlandev = dev->ml_priv;
u32 did;
int err = 0;
int result = 0;
/* There is no direct way in the hardware (AFAIK) of removing
* a key, so we will cheat by setting the key to a bogus value
*/
if (key_index >= NUM_WEPKEYS)
return -EINVAL;
/* send key to driver */
did = didmib_dot11smt_wepdefaultkeystable_key(key_index + 1);
result = prism2_domibset_pstr32(wlandev, did, 13, "0000000000000");
if (result)
err = -EFAULT;
return err;
}
static int prism2_set_default_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_index, bool unicast, bool multicast)
{
struct wlandevice *wlandev = dev->ml_priv;
int err = 0;
int result = 0;
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11SMT_PRIVACYTABLE_WEPDEFAULTKEYID,
key_index);
if (result)
err = -EFAULT;
return err;
}
static int prism2_get_station(struct wiphy *wiphy, struct net_device *dev,
const u8 *mac, struct station_info *sinfo)
{
struct wlandevice *wlandev = dev->ml_priv;
struct p80211msg_lnxreq_commsquality quality;
int result;
memset(sinfo, 0, sizeof(*sinfo));
if (!wlandev || (wlandev->msdstate != WLAN_MSD_RUNNING))
return -EOPNOTSUPP;
/* build request message */
quality.msgcode = DIDMSG_LNXREQ_COMMSQUALITY;
quality.dbm.data = P80211ENUM_truth_true;
quality.dbm.status = P80211ENUM_msgitem_status_data_ok;
/* send message to nsd */
if (!wlandev->mlmerequest)
return -EOPNOTSUPP;
result = wlandev->mlmerequest(wlandev, (struct p80211msg *)&quality);
if (result == 0) {
sinfo->txrate.legacy = quality.txrate.data;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
sinfo->signal = quality.level.data;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
}
return result;
}
static int prism2_scan(struct wiphy *wiphy,
struct cfg80211_scan_request *request)
{
struct net_device *dev;
struct prism2_wiphy_private *priv = wiphy_priv(wiphy);
struct wlandevice *wlandev;
struct p80211msg_dot11req_scan msg1;
struct p80211msg_dot11req_scan_results msg2;
struct cfg80211_bss *bss;
struct cfg80211_scan_info info = {};
int result;
int err = 0;
int numbss = 0;
int i = 0;
u8 ie_buf[46];
int ie_len;
if (!request)
return -EINVAL;
dev = request->wdev->netdev;
wlandev = dev->ml_priv;
if (priv->scan_request && priv->scan_request != request)
return -EBUSY;
if (wlandev->macmode == WLAN_MACMODE_ESS_AP) {
netdev_err(dev, "Can't scan in AP mode\n");
return -EOPNOTSUPP;
}
priv->scan_request = request;
memset(&msg1, 0x00, sizeof(msg1));
msg1.msgcode = DIDMSG_DOT11REQ_SCAN;
msg1.bsstype.data = P80211ENUM_bsstype_any;
memset(&msg1.bssid.data.data, 0xFF, sizeof(msg1.bssid.data.data));
msg1.bssid.data.len = 6;
if (request->n_ssids > 0) {
msg1.scantype.data = P80211ENUM_scantype_active;
msg1.ssid.data.len = request->ssids->ssid_len;
memcpy(msg1.ssid.data.data,
request->ssids->ssid, request->ssids->ssid_len);
} else {
msg1.scantype.data = 0;
}
msg1.probedelay.data = 0;
for (i = 0;
(i < request->n_channels) && i < ARRAY_SIZE(prism2_channels);
i++)
msg1.channellist.data.data[i] =
ieee80211_frequency_to_channel(
request->channels[i]->center_freq);
msg1.channellist.data.len = request->n_channels;
msg1.maxchanneltime.data = 250;
msg1.minchanneltime.data = 200;
result = p80211req_dorequest(wlandev, (u8 *)&msg1);
if (result) {
err = prism2_result2err(msg1.resultcode.data);
goto exit;
}
/* Now retrieve scan results */
numbss = msg1.numbss.data;
for (i = 0; i < numbss; i++) {
int freq;
memset(&msg2, 0, sizeof(msg2));
msg2.msgcode = DIDMSG_DOT11REQ_SCAN_RESULTS;
msg2.bssindex.data = i;
result = p80211req_dorequest(wlandev, (u8 *)&msg2);
if ((result != 0) ||
(msg2.resultcode.data != P80211ENUM_resultcode_success)) {
break;
}
ie_buf[0] = WLAN_EID_SSID;
ie_buf[1] = msg2.ssid.data.len;
ie_len = ie_buf[1] + 2;
memcpy(&ie_buf[2], &msg2.ssid.data.data, msg2.ssid.data.len);
freq = ieee80211_channel_to_frequency(msg2.dschannel.data,
NL80211_BAND_2GHZ);
bss = cfg80211_inform_bss(wiphy,
ieee80211_get_channel(wiphy, freq),
CFG80211_BSS_FTYPE_UNKNOWN,
(const u8 *)&msg2.bssid.data.data,
msg2.timestamp.data, msg2.capinfo.data,
msg2.beaconperiod.data,
ie_buf,
ie_len,
(msg2.signal.data - 65536) * 100, /* Conversion to signed type */
GFP_KERNEL
);
if (!bss) {
err = -ENOMEM;
goto exit;
}
cfg80211_put_bss(wiphy, bss);
}
if (result)
err = prism2_result2err(msg2.resultcode.data);
exit:
info.aborted = !!(err);
cfg80211_scan_done(request, &info);
priv->scan_request = NULL;
return err;
}
static int prism2_set_wiphy_params(struct wiphy *wiphy, u32 changed)
{
struct prism2_wiphy_private *priv = wiphy_priv(wiphy);
struct wlandevice *wlandev = priv->wlandev;
u32 data;
int result;
int err = 0;
if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
if (wiphy->rts_threshold == -1)
data = 2347;
else
data = wiphy->rts_threshold;
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11MAC_OPERATIONTABLE_RTSTHRESHOLD,
data);
if (result) {
err = -EFAULT;
goto exit;
}
}
if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
if (wiphy->frag_threshold == -1)
data = 2346;
else
data = wiphy->frag_threshold;
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11MAC_OPERATIONTABLE_FRAGMENTATIONTHRESHOLD,
data);
if (result) {
err = -EFAULT;
goto exit;
}
}
exit:
return err;
}
static int prism2_connect(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_connect_params *sme)
{
struct wlandevice *wlandev = dev->ml_priv;
struct ieee80211_channel *channel = sme->channel;
struct p80211msg_lnxreq_autojoin msg_join;
u32 did;
int length = sme->ssid_len;
int chan = -1;
int is_wep = (sme->crypto.cipher_group == WLAN_CIPHER_SUITE_WEP40) ||
(sme->crypto.cipher_group == WLAN_CIPHER_SUITE_WEP104);
int result;
int err = 0;
/* Set the channel */
if (channel) {
chan = ieee80211_frequency_to_channel(channel->center_freq);
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11PHY_DSSSTABLE_CURRENTCHANNEL,
chan);
if (result)
goto exit;
}
/* Set the authorization */
if ((sme->auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM) ||
((sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC) && !is_wep))
msg_join.authtype.data = P80211ENUM_authalg_opensystem;
else if ((sme->auth_type == NL80211_AUTHTYPE_SHARED_KEY) ||
((sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC) && is_wep))
msg_join.authtype.data = P80211ENUM_authalg_sharedkey;
else
netdev_warn(dev,
"Unhandled authorisation type for connect (%d)\n",
sme->auth_type);
/* Set the encryption - we only support wep */
if (is_wep) {
if (sme->key) {
if (sme->key_idx >= NUM_WEPKEYS) {
err = -EINVAL;
goto exit;
}
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11SMT_PRIVACYTABLE_WEPDEFAULTKEYID,
sme->key_idx);
if (result)
goto exit;
/* send key to driver */
did = didmib_dot11smt_wepdefaultkeystable_key(
sme->key_idx + 1);
result = prism2_domibset_pstr32(wlandev,
did, sme->key_len,
(u8 *)sme->key);
if (result)
goto exit;
}
/* Assume we should set privacy invoked and exclude unencrypted
* We could possible use sme->privacy here, but the assumption
* seems reasonable anyways
*/
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11SMT_PRIVACYTABLE_PRIVACYINVOKED,
P80211ENUM_truth_true);
if (result)
goto exit;
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11SMT_PRIVACYTABLE_EXCLUDEUNENCRYPTED,
P80211ENUM_truth_true);
if (result)
goto exit;
} else {
/* Assume we should unset privacy invoked
* and exclude unencrypted
*/
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11SMT_PRIVACYTABLE_PRIVACYINVOKED,
P80211ENUM_truth_false);
if (result)
goto exit;
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11SMT_PRIVACYTABLE_EXCLUDEUNENCRYPTED,
P80211ENUM_truth_false);
if (result)
goto exit;
}
/* Now do the actual join. Note there is no way that I can
* see to request a specific bssid
*/
msg_join.msgcode = DIDMSG_LNXREQ_AUTOJOIN;
memcpy(msg_join.ssid.data.data, sme->ssid, length);
msg_join.ssid.data.len = length;
result = p80211req_dorequest(wlandev, (u8 *)&msg_join);
exit:
if (result)
err = -EFAULT;
return err;
}
static int prism2_disconnect(struct wiphy *wiphy, struct net_device *dev,
u16 reason_code)
{
struct wlandevice *wlandev = dev->ml_priv;
struct p80211msg_lnxreq_autojoin msg_join;
int result;
int err = 0;
/* Do a join, with a bogus ssid. Thats the only way I can think of */
msg_join.msgcode = DIDMSG_LNXREQ_AUTOJOIN;
memcpy(msg_join.ssid.data.data, "---", 3);
msg_join.ssid.data.len = 3;
result = p80211req_dorequest(wlandev, (u8 *)&msg_join);
if (result)
err = -EFAULT;
return err;
}
static int prism2_join_ibss(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_ibss_params *params)
{
return -EOPNOTSUPP;
}
static int prism2_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
{
return -EOPNOTSUPP;
}
static int prism2_set_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
enum nl80211_tx_power_setting type, int mbm)
{
struct prism2_wiphy_private *priv = wiphy_priv(wiphy);
struct wlandevice *wlandev = priv->wlandev;
u32 data;
int result;
int err = 0;
if (type == NL80211_TX_POWER_AUTOMATIC)
data = 30;
else
data = MBM_TO_DBM(mbm);
result = prism2_domibset_uint32(wlandev,
DIDMIB_DOT11PHY_TXPOWERTABLE_CURRENTTXPOWERLEVEL,
data);
if (result) {
err = -EFAULT;
goto exit;
}
exit:
return err;
}
static int prism2_get_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
int *dbm)
{
struct prism2_wiphy_private *priv = wiphy_priv(wiphy);
struct wlandevice *wlandev = priv->wlandev;
struct p80211msg_dot11req_mibget msg;
struct p80211item_uint32 *mibitem;
int result;
int err = 0;
mibitem = (struct p80211item_uint32 *)&msg.mibattribute.data;
msg.msgcode = DIDMSG_DOT11REQ_MIBGET;
mibitem->did = DIDMIB_DOT11PHY_TXPOWERTABLE_CURRENTTXPOWERLEVEL;
result = p80211req_dorequest(wlandev, (u8 *)&msg);
if (result) {
err = -EFAULT;
goto exit;
}
*dbm = mibitem->data;
exit:
return err;
}
/* Interface callback functions, passing data back up to the cfg80211 layer */
void prism2_connect_result(struct wlandevice *wlandev, u8 failed)
{
u16 status = failed ?
WLAN_STATUS_UNSPECIFIED_FAILURE : WLAN_STATUS_SUCCESS;
cfg80211_connect_result(wlandev->netdev, wlandev->bssid,
NULL, 0, NULL, 0, status, GFP_KERNEL);
}
void prism2_disconnected(struct wlandevice *wlandev)
{
cfg80211_disconnected(wlandev->netdev, 0, NULL,
0, false, GFP_KERNEL);
}
void prism2_roamed(struct wlandevice *wlandev)
{
struct cfg80211_roam_info roam_info = {
.bssid = wlandev->bssid,
};
cfg80211_roamed(wlandev->netdev, &roam_info, GFP_KERNEL);
}
/* Structures for declaring wiphy interface */
static const struct cfg80211_ops prism2_usb_cfg_ops = {
.change_virtual_intf = prism2_change_virtual_intf,
.add_key = prism2_add_key,
.get_key = prism2_get_key,
.del_key = prism2_del_key,
.set_default_key = prism2_set_default_key,
.get_station = prism2_get_station,
.scan = prism2_scan,
.set_wiphy_params = prism2_set_wiphy_params,
.connect = prism2_connect,
.disconnect = prism2_disconnect,
.join_ibss = prism2_join_ibss,
.leave_ibss = prism2_leave_ibss,
.set_tx_power = prism2_set_tx_power,
.get_tx_power = prism2_get_tx_power,
};
/* Functions to create/free wiphy interface */
static struct wiphy *wlan_create_wiphy(struct device *dev,
struct wlandevice *wlandev)
{
struct wiphy *wiphy;
struct prism2_wiphy_private *priv;
wiphy = wiphy_new(&prism2_usb_cfg_ops, sizeof(*priv));
if (!wiphy)
return NULL;
priv = wiphy_priv(wiphy);
priv->wlandev = wlandev;
memcpy(priv->channels, prism2_channels, sizeof(prism2_channels));
memcpy(priv->rates, prism2_rates, sizeof(prism2_rates));
priv->band.channels = priv->channels;
priv->band.n_channels = ARRAY_SIZE(prism2_channels);
priv->band.bitrates = priv->rates;
priv->band.n_bitrates = ARRAY_SIZE(prism2_rates);
priv->band.band = NL80211_BAND_2GHZ;
priv->band.ht_cap.ht_supported = false;
wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
set_wiphy_dev(wiphy, dev);
wiphy->privid = prism2_wiphy_privid;
wiphy->max_scan_ssids = 1;
wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
| BIT(NL80211_IFTYPE_ADHOC);
wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
wiphy->n_cipher_suites = PRISM2_NUM_CIPHER_SUITES;
wiphy->cipher_suites = prism2_cipher_suites;
if (wiphy_register(wiphy) < 0) {
wiphy_free(wiphy);
return NULL;
}
return wiphy;
}
static void wlan_free_wiphy(struct wiphy *wiphy)
{
wiphy_unregister(wiphy);
wiphy_free(wiphy);
}