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authorJohannes Berg <johannes@sipsolutions.net>2009-04-02 20:14:06 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-04-22 16:54:40 -0400
commit25e47c18ac4d8ad09c2ed4b99c1dbbcb7e3d2c51 (patch)
treee224f603ceb19d7c416cd37fc4479a042ccc6890
parent6bad8766620a3c8b64afa981502fdb543e3cfd6c (diff)
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cfg80211: add cipher capabilities
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>
-rw-r--r--include/linux/nl80211.h4
-rw-r--r--include/net/wireless.h5
-rw-r--r--net/mac80211/main.c14
-rw-r--r--net/wireless/nl80211.c14
4 files changed, 36 insertions, 1 deletions
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 05ba3539b77..c01423888db 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -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,
diff --git a/include/net/wireless.h b/include/net/wireless.h
index 2bcdeda46d8..44c2642d3c0 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -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
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 679b3a14f11..c1145be72da 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -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;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 85b5aa3c76f..d33cab0e0fb 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -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;