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cfg80211: add cipher capabilities

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This adds the necessary code and fields to let drivers specify
their cipher capabilities and exports them to userspace. Also
update mac80211 to export the ciphers it has.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-04-02 20:14:06 +02:00 committed by John W. Linville
parent 6bad876662
commit 25e47c18ac
4 changed files with 36 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/nl80211.h
View File

@ -453,6 +453,9 @@ enum nl80211_commands {
* attributes consists of a nested attribute containing
* NL80211_FREQUENCY_ATTR_*
*
* @NL80211_ATTR_CIPHER_SUITES: a set of u32 values indicating the supported
* cipher suites
*
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@ -540,6 +543,7 @@ enum nl80211_attrs {
NL80211_ATTR_KEY_TYPE,
NL80211_ATTR_MAX_SCAN_IE_LEN,
NL80211_ATTR_CIPHER_SUITES,
NL80211_ATTR_FREQ_BEFORE,
NL80211_ATTR_FREQ_AFTER,

5
include/net/wireless.h
View File

@ -205,6 +205,8 @@ struct ieee80211_supported_band {
* on the reg_notifier() if it chooses to ignore future
* regulatory domain changes caused by other drivers.
* @signal_type: signal type reported in &struct cfg80211_bss.
* @cipher_suites: supported cipher suites
* @n_cipher_suites: number of supported cipher suites
*/
struct wiphy {
/* assign these fields before you register the wiphy */
@ -224,6 +226,9 @@ struct wiphy {
u8 max_scan_ssids;
u16 max_scan_ie_len;
int n_cipher_suites;
const u32 *cipher_suites;
/* If multiple wiphys are registered and you're handed e.g.
* a regular netdev with assigned ieee80211_ptr, you won't
* know whether it points to a wiphy your driver has registered

14
net/mac80211/main.c
View File

@ -823,6 +823,15 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
struct ieee80211_master_priv *mpriv;
int channels, i, j, max_bitrates;
bool supp_ht;
static const u32 cipher_suites[] = {
WLAN_CIPHER_SUITE_WEP40,
WLAN_CIPHER_SUITE_WEP104,
WLAN_CIPHER_SUITE_TKIP,
WLAN_CIPHER_SUITE_CCMP,
/* keep last -- depends on hw flags! */
WLAN_CIPHER_SUITE_AES_CMAC
};
/*
* generic code guarantees at least one band,
@ -894,6 +903,11 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
if (local->hw.wiphy->max_scan_ie_len)
local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
local->hw.wiphy->cipher_suites = cipher_suites;
local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
local->hw.wiphy->n_cipher_suites--;
result = wiphy_register(local->hw.wiphy);
if (result < 0)
goto fail_wiphy_register;

14
net/wireless/nl80211.c
View File

@ -208,6 +208,10 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
dev->wiphy.max_scan_ie_len);
NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
sizeof(u32) * dev->wiphy.n_cipher_suites,
dev->wiphy.cipher_suites);
nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
if (!nl_modes)
goto nla_put_failure;
@ -979,7 +983,7 @@ static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_registered_device *drv;
int err;
int err, i;
struct net_device *dev;
struct key_params params;
u8 key_idx = 0;
@ -1048,6 +1052,14 @@ static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
if (err)
goto unlock_rtnl;
for (i = 0; i < drv->wiphy.n_cipher_suites; i++)
if (params.cipher == drv->wiphy.cipher_suites[i])
break;
if (i == drv->wiphy.n_cipher_suites) {
err = -EINVAL;
goto out;
}
if (!drv->ops->add_key) {
err = -EOPNOTSUPP;
goto out;