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mac80211: add debug file for mic failure

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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>
This commit is contained in:
Saravana
2012-12-04 19:47:42 +05:30
committed by Johannes Berg
parent a6662dbae0
commit b98ea05861
3 changed files with 24 additions and 1 deletions
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17
net/mac80211/debugfs_key.c
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@@ -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);
};