/*
* CFG802.11 operation handler to delete a network key.
*/
static int
mwifiex_cfg80211_del_key(struct wiphy *wiphy, struct net_device *netdev,
u8 key_index, bool pairwise, const u8 *mac_addr)
{
struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
if (mwifiex_set_encode(priv, NULL, 0, key_index, 1)) {
wiphy_err(wiphy, "deleting the crypto keys\n");
return -EFAULT;
}
wiphy_dbg(wiphy, "info: crypto keys deleted\n");
return 0;
}
/*
* CFG802.11 operation handler to add a network key.
*/
static int
mwifiex_cfg80211_add_key(struct wiphy *wiphy, struct net_device *netdev,
u8 key_index, bool pairwise, const u8 *mac_addr,
struct key_params *params)
{
struct mwifiex_private *priv = mwifiex_cfg80211_get_priv(wiphy);
if (mwifiex_set_encode(priv, params->key, params->key_len,
key_index, 0)) {
wiphy_err(wiphy, "crypto keys added\n");
return -EFAULT;
}
return 0;
}
/*
* CFG802.11 operation handler to add a network key.
*/
static int
mwifiex_cfg80211_add_key(struct wiphy *wiphy, struct net_device *netdev,
u8 key_index, bool pairwise, const u8 *mac_addr,
struct key_params *params)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);
const u8 bc_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
const u8 *peer_mac = pairwise ? mac_addr : bc_mac;
if (mwifiex_set_encode(priv, params->key, params->key_len,
key_index, peer_mac, 0)) {
wiphy_err(wiphy, "crypto keys added\n");
return -EFAULT;
}
return 0;
}
/*
* CFG802.11 operation handler to set the default network key.
*/
static int
mwifiex_cfg80211_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
u8 key_index, bool unicast,
bool multicast)
{
struct mwifiex_private *priv = mwifiex_netdev_get_priv(netdev);
/* Return if WEP key not configured */
if (!priv->sec_info.wep_enabled)
return 0;
if (mwifiex_set_encode(priv, NULL, 0, key_index, NULL, 0)) {
wiphy_err(wiphy, "set default Tx key index\n");
return -EFAULT;
}
return 0;
}
/*
* This function connects with a BSS.
*
* This function handles both Infra and Ad-Hoc modes. It also performs
* validity checking on the provided parameters, disconnects from the
* current BSS (if any), sets up the association/scan parameters,
* including security settings, and performs specific SSID scan before
* trying to connect.
*
* For Infra mode, the function returns failure if the specified SSID
* is not found in scan table. However, for Ad-Hoc mode, it can create
* the IBSS if it does not exist. On successful completion in either case,
* the function notifies the CFG802.11 subsystem of the new BSS connection.
*/
static int
mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid,
u8 *bssid, int mode, struct ieee80211_channel *channel,
struct cfg80211_connect_params *sme, bool privacy)
{
struct cfg80211_ssid req_ssid;
int ret, auth_type = 0;
struct cfg80211_bss *bss = NULL;
u8 is_scanning_required = 0;
memset(&req_ssid, 0, sizeof(struct cfg80211_ssid));
req_ssid.ssid_len = ssid_len;
if (ssid_len > IEEE80211_MAX_SSID_LEN) {
dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
return -EINVAL;
}
memcpy(req_ssid.ssid, ssid, ssid_len);
if (!req_ssid.ssid_len || req_ssid.ssid[0] < 0x20) {
dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
return -EINVAL;
}
/* disconnect before try to associate */
mwifiex_deauthenticate(priv, NULL);
if (channel)
ret = mwifiex_set_rf_channel(priv, channel,
priv->adapter->channel_type);
/* As this is new association, clear locally stored
* keys and security related flags */
priv->sec_info.wpa_enabled = false;
priv->sec_info.wpa2_enabled = false;
priv->wep_key_curr_index = 0;
priv->sec_info.encryption_mode = 0;
priv->sec_info.is_authtype_auto = 0;
ret = mwifiex_set_encode(priv, NULL, 0, 0, NULL, 1);
if (mode == NL80211_IFTYPE_ADHOC) {
/* "privacy" is set only for ad-hoc mode */
if (privacy) {
/*
* Keep WLAN_CIPHER_SUITE_WEP104 for now so that
* the firmware can find a matching network from the
* scan. The cfg80211 does not give us the encryption
* mode at this stage so just setting it to WEP here.
*/
priv->sec_info.encryption_mode =
WLAN_CIPHER_SUITE_WEP104;
priv->sec_info.authentication_mode =
NL80211_AUTHTYPE_OPEN_SYSTEM;
}
goto done;
}
/* Now handle infra mode. "sme" is valid for infra mode only */
if (sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
priv->sec_info.is_authtype_auto = 1;
} else {
auth_type = sme->auth_type;
}
if (sme->crypto.n_ciphers_pairwise) {
priv->sec_info.encryption_mode =
sme->crypto.ciphers_pairwise[0];
priv->sec_info.authentication_mode = auth_type;
}
if (sme->crypto.cipher_group) {
priv->sec_info.encryption_mode = sme->crypto.cipher_group;
priv->sec_info.authentication_mode = auth_type;
}
if (sme->ie)
ret = mwifiex_set_gen_ie(priv, sme->ie, sme->ie_len);
if (sme->key) {
if (mwifiex_is_alg_wep(priv->sec_info.encryption_mode)) {
dev_dbg(priv->adapter->dev,
"info: setting wep encryption"
" with key len %d\n", sme->key_len);
priv->wep_key_curr_index = sme->key_idx;
ret = mwifiex_set_encode(priv, sme->key, sme->key_len,
sme->key_idx, NULL, 0);
}
}
done:
/*
* Scan entries are valid for some time (15 sec). So we can save one
* active scan time if we just try cfg80211_get_bss first. If it fails
* then request scan and cfg80211_get_bss() again for final output.
*/
while (1) {
if (is_scanning_required) {
/* Do specific SSID scanning */
if (mwifiex_request_scan(priv, &req_ssid)) {
dev_err(priv->adapter->dev, "scan error\n");
return -EFAULT;
}
}
/* Find the BSS we want using available scan results */
if (mode == NL80211_IFTYPE_ADHOC)
bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
bssid, ssid, ssid_len,
WLAN_CAPABILITY_IBSS,
WLAN_CAPABILITY_IBSS);
else
bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
bssid, ssid, ssid_len,
WLAN_CAPABILITY_ESS,
WLAN_CAPABILITY_ESS);
if (!bss) {
if (is_scanning_required) {
dev_warn(priv->adapter->dev,
"assoc: requested bss not found in scan results\n");
break;
}
is_scanning_required = 1;
} else {
dev_dbg(priv->adapter->dev,
"info: trying to associate to '%s' bssid %pM\n",
(char *) req_ssid.ssid, bss->bssid);
memcpy(&priv->cfg_bssid, bss->bssid, ETH_ALEN);
break;
}
}
if (mwifiex_bss_start(priv, bss, &req_ssid))
return -EFAULT;
if (mode == NL80211_IFTYPE_ADHOC) {
/* Inform the BSS information to kernel, otherwise
* kernel will give a panic after successful assoc */
if (mwifiex_cfg80211_inform_ibss_bss(priv))
return -EFAULT;
}
return ret;
}
/*
* This function connects with a BSS.
*
* This function handles both Infra and Ad-Hoc modes. It also performs
* validity checking on the provided parameters, disconnects from the
* current BSS (if any), sets up the association/scan parameters,
* including security settings, and performs specific SSID scan before
* trying to connect.
*
* For Infra mode, the function returns failure if the specified SSID
* is not found in scan table. However, for Ad-Hoc mode, it can create
* the IBSS if it does not exist. On successful completion in either case,
* the function notifies the CFG802.11 subsystem of the new BSS connection,
* otherwise the kernel will panic.
*/
static int
mwifiex_cfg80211_assoc(struct mwifiex_private *priv, size_t ssid_len, u8 *ssid,
u8 *bssid, int mode, struct ieee80211_channel *channel,
struct cfg80211_connect_params *sme, bool privacy)
{
struct mwifiex_802_11_ssid req_ssid;
struct mwifiex_ssid_bssid ssid_bssid;
int ret, auth_type = 0;
memset(&req_ssid, 0, sizeof(struct mwifiex_802_11_ssid));
memset(&ssid_bssid, 0, sizeof(struct mwifiex_ssid_bssid));
req_ssid.ssid_len = ssid_len;
if (ssid_len > IEEE80211_MAX_SSID_LEN) {
dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
return -EINVAL;
}
memcpy(req_ssid.ssid, ssid, ssid_len);
if (!req_ssid.ssid_len || req_ssid.ssid[0] < 0x20) {
dev_err(priv->adapter->dev, "invalid SSID - aborting\n");
return -EINVAL;
}
/* disconnect before try to associate */
mwifiex_deauthenticate(priv, NULL);
if (channel)
ret = mwifiex_set_rf_channel(priv, channel,
mwifiex_channels_to_cfg80211_channel_type
(priv->adapter->chan_offset));
ret = mwifiex_set_encode(priv, NULL, 0, 0, 1); /* Disable keys */
if (mode == NL80211_IFTYPE_ADHOC) {
/* "privacy" is set only for ad-hoc mode */
if (privacy) {
/*
* Keep WLAN_CIPHER_SUITE_WEP104 for now so that
* the firmware can find a matching network from the
* scan. The cfg80211 does not give us the encryption
* mode at this stage so just setting it to WEP here.
*/
priv->sec_info.encryption_mode =
WLAN_CIPHER_SUITE_WEP104;
priv->sec_info.authentication_mode =
NL80211_AUTHTYPE_OPEN_SYSTEM;
}
goto done;
}
/* Now handle infra mode. "sme" is valid for infra mode only */
if (sme->auth_type == NL80211_AUTHTYPE_AUTOMATIC
|| sme->auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM)
auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
else if (sme->auth_type == NL80211_AUTHTYPE_SHARED_KEY)
auth_type = NL80211_AUTHTYPE_SHARED_KEY;
if (sme->crypto.n_ciphers_pairwise) {
priv->sec_info.encryption_mode =
sme->crypto.ciphers_pairwise[0];
priv->sec_info.authentication_mode = auth_type;
}
if (sme->crypto.cipher_group) {
priv->sec_info.encryption_mode = sme->crypto.cipher_group;
priv->sec_info.authentication_mode = auth_type;
}
if (sme->ie)
ret = mwifiex_set_gen_ie(priv, sme->ie, sme->ie_len);
if (sme->key) {
if (mwifiex_is_alg_wep(priv->sec_info.encryption_mode)) {
dev_dbg(priv->adapter->dev,
"info: setting wep encryption"
" with key len %d\n", sme->key_len);
ret = mwifiex_set_encode(priv, sme->key, sme->key_len,
sme->key_idx, 0);
}
}
done:
/* Do specific SSID scanning */
if (mwifiex_request_scan(priv, &req_ssid)) {
dev_err(priv->adapter->dev, "scan error\n");
return -EFAULT;
}
memcpy(&ssid_bssid.ssid, &req_ssid, sizeof(struct mwifiex_802_11_ssid));
if (mode != NL80211_IFTYPE_ADHOC) {
if (mwifiex_find_best_bss(priv, &ssid_bssid))
return -EFAULT;
/* Inform the BSS information to kernel, otherwise
* kernel will give a panic after successful assoc */
if (mwifiex_inform_bss_from_scan_result(priv, &req_ssid))
return -EFAULT;
}
dev_dbg(priv->adapter->dev, "info: trying to associate to %s and bssid %pM\n",
(char *) req_ssid.ssid, ssid_bssid.bssid);
memcpy(&priv->cfg_bssid, ssid_bssid.bssid, 6);
/* Connect to BSS by ESSID */
memset(&ssid_bssid.bssid, 0, ETH_ALEN);
if (!netif_queue_stopped(priv->netdev))
netif_stop_queue(priv->netdev);
if (mwifiex_bss_start(priv, &ssid_bssid))
return -EFAULT;
if (mode == NL80211_IFTYPE_ADHOC) {
/* Inform the BSS information to kernel, otherwise
* kernel will give a panic after successful assoc */
if (mwifiex_cfg80211_inform_ibss_bss(priv))
return -EFAULT;
}
return ret;
}