From 4271d4bde0a23edc53097339fc185d0c09c75819 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Sun, 29 Nov 2020 17:30:45 +0200 Subject: mac80211: support MIC error/replay detected counters driver update Support the driver incrementing MIC error and replay detected counters when having detected a bad frame, if it drops it directly instead of relying on mac80211 to do the checks. These are then exposed to userspace, though currently only in some cases and in debugfs. Signed-off-by: Johannes Berg Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20201129172929.fb59be9c6de8.Ife2260887366f585afadd78c983ebea93d2bb54b@changeid Signed-off-by: Johannes Berg --- net/mac80211/key.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'net/mac80211/key.c') diff --git a/net/mac80211/key.c b/net/mac80211/key.c index 8c5f829ff6d7..a4817aa4b171 100644 --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -1300,3 +1300,52 @@ ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, return &key->conf; } EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_add); + +void ieee80211_key_mic_failure(struct ieee80211_key_conf *keyconf) +{ + struct ieee80211_key *key; + + key = container_of(keyconf, struct ieee80211_key, conf); + + switch (key->conf.cipher) { + case WLAN_CIPHER_SUITE_AES_CMAC: + case WLAN_CIPHER_SUITE_BIP_CMAC_256: + key->u.aes_cmac.icverrors++; + break; + case WLAN_CIPHER_SUITE_BIP_GMAC_128: + case WLAN_CIPHER_SUITE_BIP_GMAC_256: + key->u.aes_gmac.icverrors++; + break; + default: + /* ignore the others for now, we don't keep counters now */ + break; + } +} +EXPORT_SYMBOL_GPL(ieee80211_key_mic_failure); + +void ieee80211_key_replay(struct ieee80211_key_conf *keyconf) +{ + struct ieee80211_key *key; + + key = container_of(keyconf, struct ieee80211_key, conf); + + switch (key->conf.cipher) { + case WLAN_CIPHER_SUITE_CCMP: + case WLAN_CIPHER_SUITE_CCMP_256: + key->u.ccmp.replays++; + break; + case WLAN_CIPHER_SUITE_AES_CMAC: + case WLAN_CIPHER_SUITE_BIP_CMAC_256: + key->u.aes_cmac.replays++; + break; + case WLAN_CIPHER_SUITE_BIP_GMAC_128: + case WLAN_CIPHER_SUITE_BIP_GMAC_256: + key->u.aes_gmac.replays++; + break; + case WLAN_CIPHER_SUITE_GCMP: + case WLAN_CIPHER_SUITE_GCMP_256: + key->u.gcmp.replays++; + break; + } +} +EXPORT_SYMBOL_GPL(ieee80211_key_replay); -- cgit v1.2.3