diff options
author | Saravana <saravanad@posedge.com> | 2012-12-04 14:17:42 (GMT) |
---|---|---|
committer | Johannes Berg <johannes.berg@intel.com> | 2012-12-05 08:44:41 (GMT) |
commit | b98ea05861d76f458029096e8b2939fcb58e9530 (patch) | |
tree | a12b1993b0495a2c5f980f14ea94553ccae2b24e /net/mac80211/debugfs_key.c | |
parent | a6662dbae0b3a7a91317ec88b5aa0cf8d716f183 (diff) | |
download | linux-b98ea05861d76f458029096e8b2939fcb58e9530.tar.xz |
mac80211: add debug file for mic failure
The mic failure count provides the number of mic failures that
have happened on a given key (without a countermeasure being
started, since that would remove the key).
Signed-off-by: Saravana <saravanad@posedge.com>
[fix NULL pointer issues]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/debugfs_key.c')
-rw-r--r-- | net/mac80211/debugfs_key.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c index 2d42354..c3a3082 100644 --- a/net/mac80211/debugfs_key.c +++ b/net/mac80211/debugfs_key.c @@ -199,6 +199,22 @@ static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, } KEY_OPS(icverrors); +static ssize_t key_mic_failures_read(struct file *file, char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct ieee80211_key *key = file->private_data; + char buf[20]; + int len; + + if (key->conf.cipher != WLAN_CIPHER_SUITE_TKIP) + return -EINVAL; + + len = scnprintf(buf, sizeof(buf), "%u\n", key->u.tkip.mic_failures); + + return simple_read_from_buffer(userbuf, count, ppos, buf, len); +} +KEY_OPS(mic_failures); + static ssize_t key_key_read(struct file *file, char __user *userbuf, size_t count, loff_t *ppos) { @@ -260,6 +276,7 @@ void ieee80211_debugfs_key_add(struct ieee80211_key *key) DEBUGFS_ADD(rx_spec); DEBUGFS_ADD(replays); DEBUGFS_ADD(icverrors); + DEBUGFS_ADD(mic_failures); DEBUGFS_ADD(key); DEBUGFS_ADD(ifindex); }; |