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authorJohannes Berg <johannes@sipsolutions.net>2007-12-19 02:03:31 +0100
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:59:50 -0800
commit62da92fb75c346b503bca765fd1337e08771c9fe (patch)
tree86246464a61297e4df2e593c31b2e2dda325cf5c /net/mac80211/cfg.c
parente8cbb4cbeb7642d179b01c35adf036ddb65f3dd0 (diff)
downloadlinux-62da92fb75c346b503bca765fd1337e08771c9fe.tar.bz2
mac80211: support getting key sequence counters via cfg80211
This implements cfg80211's get_key() to allow retrieving the sequence counter for a TKIP or CCMP key from userspace. It also cleans up and documents the associated low-level driver interface. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mac80211/cfg.c')
-rw-r--r--net/mac80211/cfg.c85
1 files changed, 84 insertions, 1 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index d49f7b58b05c..4c1ce353c662 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1,7 +1,7 @@
/*
* mac80211 configuration hooks for cfg80211
*
- * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
*
* This file is GPLv2 as found in COPYING.
*/
@@ -175,6 +175,88 @@ static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
return 0;
}
+static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
+ u8 key_idx, u8 *mac_addr, void *cookie,
+ void (*callback)(void *cookie,
+ struct key_params *params))
+{
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ struct sta_info *sta = NULL;
+ u8 seq[6] = {0};
+ struct key_params params;
+ struct ieee80211_key *key;
+ u32 iv32;
+ u16 iv16;
+ int err = -ENOENT;
+
+ if (mac_addr) {
+ sta = sta_info_get(sdata->local, mac_addr);
+ if (!sta)
+ goto out;
+
+ key = sta->key;
+ } else
+ key = sdata->keys[key_idx];
+
+ if (!key)
+ goto out;
+
+ memset(&params, 0, sizeof(params));
+
+ switch (key->conf.alg) {
+ case ALG_TKIP:
+ params.cipher = WLAN_CIPHER_SUITE_TKIP;
+
+ iv32 = key->u.tkip.iv32;
+ iv16 = key->u.tkip.iv16;
+
+ if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE &&
+ sdata->local->ops->get_tkip_seq)
+ sdata->local->ops->get_tkip_seq(
+ local_to_hw(sdata->local),
+ key->conf.hw_key_idx,
+ &iv32, &iv16);
+
+ seq[0] = iv16 & 0xff;
+ seq[1] = (iv16 >> 8) & 0xff;
+ seq[2] = iv32 & 0xff;
+ seq[3] = (iv32 >> 8) & 0xff;
+ seq[4] = (iv32 >> 16) & 0xff;
+ seq[5] = (iv32 >> 24) & 0xff;
+ params.seq = seq;
+ params.seq_len = 6;
+ break;
+ case ALG_CCMP:
+ params.cipher = WLAN_CIPHER_SUITE_CCMP;
+ seq[0] = key->u.ccmp.tx_pn[5];
+ seq[1] = key->u.ccmp.tx_pn[4];
+ seq[2] = key->u.ccmp.tx_pn[3];
+ seq[3] = key->u.ccmp.tx_pn[2];
+ seq[4] = key->u.ccmp.tx_pn[1];
+ seq[5] = key->u.ccmp.tx_pn[0];
+ params.seq = seq;
+ params.seq_len = 6;
+ break;
+ case ALG_WEP:
+ if (key->conf.keylen == 5)
+ params.cipher = WLAN_CIPHER_SUITE_WEP40;
+ else
+ params.cipher = WLAN_CIPHER_SUITE_WEP104;
+ break;
+ }
+
+ params.key = key->conf.key;
+ params.key_len = key->conf.keylen;
+
+ callback(cookie, &params);
+ err = 0;
+
+ out:
+ if (sta)
+ sta_info_put(sta);
+ return err;
+}
+
static int ieee80211_config_default_key(struct wiphy *wiphy,
struct net_device *dev,
u8 key_idx)
@@ -193,5 +275,6 @@ struct cfg80211_ops mac80211_config_ops = {
.change_virtual_intf = ieee80211_change_iface,
.add_key = ieee80211_add_key,
.del_key = ieee80211_del_key,
+ .get_key = ieee80211_get_key,
.set_default_key = ieee80211_config_default_key,
};