Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=62da92fb75c346b503bca765fd1337e08771c9fe
Commit: 62da92fb75c346b503bca765fd1337e08771c9fe
Parent: e8cbb4cbeb7642d179b01c35adf036ddb65f3dd0
Author: Johannes Berg <[EMAIL PROTECTED]>
AuthorDate: Wed Dec 19 02:03:31 2007 +0100
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 14:59:50 2008 -0800
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 <[EMAIL PROTECTED]>
Signed-off-by: John W. Linville <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
include/net/mac80211.h | 14 +++-----
net/mac80211/cfg.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 89 insertions(+), 10 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 5b9e7a2..a762a75 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -647,9 +647,6 @@ struct ieee80211_key_conf {
u8 key[0];
};
-#define IEEE80211_SEQ_COUNTER_RX 0
-#define IEEE80211_SEQ_COUNTER_TX 1
-
/**
* enum set_key_cmd - key command
*
@@ -996,9 +993,9 @@ enum ieee80211_erp_change_flags {
*
* @get_stats: return low-level statistics
*
- * @get_sequence_counter: For devices that have internal sequence counters this
- * callback allows mac80211 to access the current value of a counter.
- * This callback seems not well-defined, tell us if you need it.
+ * @get_tkip_seq: If your device implements TKIP encryption in hardware this
+ * callback should be provided to read the TKIP transmit IVs (both IV32
+ * and IV16) for the given key from hardware.
*
* @set_rts_threshold: Configuration of RTS threshold (if device needs it)
*
@@ -1073,9 +1070,8 @@ struct ieee80211_ops {
int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);
int (*get_stats)(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats);
- int (*get_sequence_counter)(struct ieee80211_hw *hw,
- u8* addr, u8 keyidx, u8 txrx,
- u32* iv32, u16* iv16);
+ void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx,
+ u32 *iv32, u16 *iv16);
int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
int (*set_retry_limit)(struct ieee80211_hw *hw,
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index d49f7b5..4c1ce35 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1,7 +1,7 @@
/*
* mac80211 configuration hooks for cfg80211
*
- * Copyright 2006 Johannes Berg <[EMAIL PROTECTED]>
+ * Copyright 2006, 2007 Johannes Berg <[EMAIL PROTECTED]>
*
* 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(¶ms, 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, ¶ms);
+ 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,
};
-
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