From 6c02fab72429b4950f5d6edd003310d9245e18e4 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 25 Sep 2023 17:25:10 +0200 Subject: [PATCH] wifi: mac80211: split ieee80211_drop_unencrypted_mgmt() return value This has many different reasons, split the return value into the individual reasons for better traceability. Also, since symbolic tracing doesn't work for these, add a few comments for the numbering. Signed-off-by: Johannes Berg --- net/mac80211/drop.h | 9 +++++++++ net/mac80211/rx.c | 21 +++++++++------------ 2 files changed, 18 insertions(+), 12 deletions(-) diff --git a/net/mac80211/drop.h b/net/mac80211/drop.h index 725a07a5b614..3acc21ae9c69 100644 --- a/net/mac80211/drop.h +++ b/net/mac80211/drop.h @@ -18,6 +18,7 @@ typedef unsigned int __bitwise ieee80211_rx_result; /* this line for the trailing \ - add before this */ #define MAC80211_DROP_REASONS_UNUSABLE(R) \ + /* 0x00 == ___RX_DROP_UNUSABLE */ \ R(RX_DROP_U_MIC_FAIL) \ R(RX_DROP_U_REPLAY) \ R(RX_DROP_U_BAD_MMIE) \ @@ -33,8 +34,15 @@ typedef unsigned int __bitwise ieee80211_rx_result; R(RX_DROP_U_BAD_AMSDU) \ R(RX_DROP_U_BAD_AMSDU_CIPHER) \ R(RX_DROP_U_INVALID_8023) \ + /* 0x10 */ \ R(RX_DROP_U_RUNT_ACTION) \ R(RX_DROP_U_UNPROT_ACTION) \ + R(RX_DROP_U_UNPROT_DUAL) \ + R(RX_DROP_U_UNPROT_UCAST_MGMT) \ + R(RX_DROP_U_UNPROT_MCAST_MGMT) \ + R(RX_DROP_U_UNPROT_BEACON) \ + R(RX_DROP_U_UNPROT_UNICAST_PUB_ACTION) \ + R(RX_DROP_U_UNPROT_ROBUST_ACTION) \ R(RX_DROP_U_ACTION_UNKNOWN_SRC) \ R(RX_DROP_U_REJECTED_ACTION_RESPONSE) \ R(RX_DROP_U_EXPECT_DEFRAG_PROT) \ @@ -43,6 +51,7 @@ typedef unsigned int __bitwise ieee80211_rx_result; R(RX_DROP_U_NO_ICV) \ R(RX_DROP_U_AP_RX_GROUPCAST) \ R(RX_DROP_U_SHORT_MMIC) \ + /* 0x20 */ \ R(RX_DROP_U_MMIC_FAIL) \ R(RX_DROP_U_SHORT_TKIP) \ R(RX_DROP_U_TKIP_FAIL) \ diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 1851b86fc5fd..ff98681c70e3 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2416,12 +2416,12 @@ static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) * decrypted them already. */ if (status->flag & RX_FLAG_DECRYPTED) - return 0; + return RX_CONTINUE; /* drop unicast protected dual (that wasn't protected) */ if (ieee80211_is_action(fc) && mgmt->u.action.category == WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) - return -EACCES; + return RX_DROP_U_UNPROT_DUAL; if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { if (unlikely(!ieee80211_has_protected(fc) && @@ -2433,13 +2433,13 @@ static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) * during 4-way-HS (key is installed after HS). */ if (!rx->key) - return 0; + return RX_CONTINUE; cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, rx->skb->data, rx->skb->len); } - return -EACCES; + return RX_DROP_U_UNPROT_UCAST_MGMT; } /* BIP does not use Protected field, so need to check MMIE */ if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && @@ -2449,14 +2449,14 @@ static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, rx->skb->data, rx->skb->len); - return -EACCES; + return RX_DROP_U_UNPROT_MCAST_MGMT; } if (unlikely(ieee80211_is_beacon(fc) && rx->key && ieee80211_get_mmie_keyidx(rx->skb) < 0)) { cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, rx->skb->data, rx->skb->len); - return -EACCES; + return RX_DROP_U_UNPROT_BEACON; } /* * When using MFP, Action frames are not allowed prior to @@ -2464,13 +2464,13 @@ static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) */ if (unlikely(ieee80211_is_action(fc) && !rx->key && ieee80211_is_robust_mgmt_frame(rx->skb))) - return -EACCES; + return RX_DROP_U_UNPROT_ACTION; /* drop unicast public action frames when using MPF */ if (is_unicast_ether_addr(mgmt->da) && ieee80211_is_public_action((void *)rx->skb->data, rx->skb->len)) - return -EACCES; + return RX_DROP_U_UNPROT_UNICAST_PUB_ACTION; } return 0; @@ -3400,10 +3400,7 @@ ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) rx->flags |= IEEE80211_RX_BEACON_REPORTED; } - if (ieee80211_drop_unencrypted_mgmt(rx)) - return RX_DROP_U_UNPROT_ACTION; - - return RX_CONTINUE; + return ieee80211_drop_unencrypted_mgmt(rx); } static bool