Commit e4c26add authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

mac80211: split RX_DROP



Some instances of RX_DROP mean that the frame was useless,
others mean that the frame should be visible in userspace
on "cooked" monitor interfaces. This patch splits up RX_DROP
and changes each instance appropriately.
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 9ae54c84
......@@ -114,9 +114,10 @@ typedef unsigned __bitwise__ ieee80211_tx_result;
#define TX_QUEUED ((__force ieee80211_tx_result) 2u)
typedef unsigned __bitwise__ ieee80211_rx_result;
#define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
#define RX_DROP ((__force ieee80211_rx_result) 1u)
#define RX_QUEUED ((__force ieee80211_rx_result) 2u)
#define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
#define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u)
#define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u)
#define RX_QUEUED ((__force ieee80211_rx_result) 3u)
/* flags used in struct ieee80211_txrx_data.flags */
......
......@@ -2567,7 +2567,7 @@ ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
u16 fc;
if (skb->len < 2)
return RX_DROP;
return RX_DROP_UNUSABLE;
mgmt = (struct ieee80211_mgmt *) skb->data;
fc = le16_to_cpu(mgmt->frame_control);
......@@ -2576,7 +2576,7 @@ ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
return RX_CONTINUE;
if (skb->len < 24)
return RX_DROP;
return RX_DROP_MONITOR;
if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
......
......@@ -380,7 +380,7 @@ ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx)
if (unlikely(rx->flags & IEEE80211_TXRXD_RXIN_SCAN)) {
/* scanning finished during invoking of handlers */
I802_DEBUG_INC(local->rx_handlers_drop_passive_scan);
return RX_DROP;
return RX_DROP_UNUSABLE;
}
return RX_CONTINUE;
......@@ -401,14 +401,14 @@ ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
rx->local->dot11FrameDuplicateCount++;
rx->sta->num_duplicates++;
}
return RX_DROP;
return RX_DROP_MONITOR;
} else
rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl;
}
if (unlikely(rx->skb->len < 16)) {
I802_DEBUG_INC(rx->local->rx_handlers_drop_short);
return RX_DROP;
return RX_DROP_MONITOR;
}
/* Drop disallowed frame classes based on STA auth/assoc state;
......@@ -430,10 +430,10 @@ ieee80211_rx_h_check(struct ieee80211_txrx_data *rx)
|| !(rx->flags & IEEE80211_TXRXD_RXRA_MATCH)) {
/* Drop IBSS frames and frames for other hosts
* silently. */
return RX_DROP;
return RX_DROP_MONITOR;
}
return RX_DROP;
return RX_DROP_MONITOR;
}
return RX_CONTINUE;
......@@ -446,7 +446,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_txrx_data *rx)
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data;
int keyidx;
int hdrlen;
ieee80211_rx_result result = RX_DROP;
ieee80211_rx_result result = RX_DROP_UNUSABLE;
struct ieee80211_key *stakey = NULL;
/*
......@@ -507,7 +507,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_txrx_data *rx)
hdrlen = ieee80211_get_hdrlen(rx->fc);
if (rx->skb->len < 8 + hdrlen)
return RX_DROP; /* TODO: count this? */
return RX_DROP_UNUSABLE; /* TODO: count this? */
/*
* no need to call ieee80211_wep_get_keyidx,
......@@ -536,7 +536,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_txrx_data *rx)
printk(KERN_DEBUG "%s: RX protected frame,"
" but have no key\n", rx->dev->name);
#endif /* CONFIG_MAC80211_DEBUG */
return RX_DROP;
return RX_DROP_MONITOR;
}
/* Check for weak IVs if possible */
......@@ -821,7 +821,7 @@ ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
rx->u.rx.queue, hdr);
if (!entry) {
I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
return RX_DROP;
return RX_DROP_MONITOR;
}
/* Verify that MPDUs within one MSDU have sequential PN values.
......@@ -830,7 +830,7 @@ ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
int i;
u8 pn[CCMP_PN_LEN], *rpn;
if (!rx->key || rx->key->conf.alg != ALG_CCMP)
return RX_DROP;
return RX_DROP_UNUSABLE;
memcpy(pn, entry->last_pn, CCMP_PN_LEN);
for (i = CCMP_PN_LEN - 1; i >= 0; i--) {
pn[i]++;
......@@ -848,7 +848,7 @@ ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
rpn[0], rpn[1], rpn[2], rpn[3], rpn[4],
rpn[5], pn[0], pn[1], pn[2], pn[3],
pn[4], pn[5]);
return RX_DROP;
return RX_DROP_UNUSABLE;
}
memcpy(entry->last_pn, pn, CCMP_PN_LEN);
}
......@@ -869,7 +869,7 @@ ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
GFP_ATOMIC))) {
I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag);
__skb_queue_purge(&entry->skb_list);
return RX_DROP;
return RX_DROP_UNUSABLE;
}
}
while ((skb = __skb_dequeue(&entry->skb_list))) {
......@@ -906,7 +906,7 @@ ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx)
if ((sdata->vif.type != IEEE80211_IF_TYPE_AP) &&
(sdata->vif.type != IEEE80211_IF_TYPE_VLAN))
return RX_DROP;
return RX_DROP_UNUSABLE;
skb = skb_dequeue(&rx->sta->tx_filtered);
if (!skb) {
......@@ -1257,14 +1257,14 @@ ieee80211_rx_h_amsdu(struct ieee80211_txrx_data *rx)
return RX_CONTINUE;
if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
return RX_DROP;
return RX_DROP_MONITOR;
if (!(rx->flags & IEEE80211_TXRXD_RX_AMSDU))
return RX_CONTINUE;
err = ieee80211_data_to_8023(rx);
if (unlikely(err))
return RX_DROP;
return RX_DROP_UNUSABLE;
skb->dev = dev;
......@@ -1274,7 +1274,7 @@ ieee80211_rx_h_amsdu(struct ieee80211_txrx_data *rx)
/* skip the wrapping header */
eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr));
if (!eth)
return RX_DROP;
return RX_DROP_UNUSABLE;
while (skb != frame) {
u8 padding;
......@@ -1289,7 +1289,7 @@ ieee80211_rx_h_amsdu(struct ieee80211_txrx_data *rx)
/* the last MSDU has no padding */
if (subframe_len > remaining) {
printk(KERN_DEBUG "%s: wrong buffer size", dev->name);
return RX_DROP;
return RX_DROP_UNUSABLE;
}
skb_pull(skb, sizeof(struct ethhdr));
......@@ -1301,7 +1301,7 @@ ieee80211_rx_h_amsdu(struct ieee80211_txrx_data *rx)
subframe_len);
if (frame == NULL)
return RX_DROP;
return RX_DROP_UNUSABLE;
skb_reserve(frame, local->hw.extra_tx_headroom +
sizeof(struct ethhdr));
......@@ -1314,7 +1314,7 @@ ieee80211_rx_h_amsdu(struct ieee80211_txrx_data *rx)
printk(KERN_DEBUG "%s: wrong buffer size ",
dev->name);
dev_kfree_skb(frame);
return RX_DROP;
return RX_DROP_UNUSABLE;
}
}
......@@ -1344,7 +1344,7 @@ ieee80211_rx_h_amsdu(struct ieee80211_txrx_data *rx)
if (!ieee80211_frame_allowed(rx)) {
if (skb == frame) /* last frame */
return RX_DROP;
return RX_DROP_UNUSABLE;
dev_kfree_skb(frame);
continue;
}
......@@ -1367,14 +1367,14 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
return RX_CONTINUE;
if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
return RX_DROP;
return RX_DROP_MONITOR;
err = ieee80211_data_to_8023(rx);
if (unlikely(err))
return RX_DROP;
return RX_DROP_UNUSABLE;
if (!ieee80211_frame_allowed(rx))
return RX_DROP;
return RX_DROP_MONITOR;
rx->skb->dev = dev;
......@@ -1423,7 +1423,7 @@ ieee80211_rx_h_ctrl(struct ieee80211_txrx_data *rx)
ieee80211_sta_manage_reorder_buf(hw, tid_agg_rx, NULL,
start_seq_num, 1);
rcu_read_unlock();
return RX_DROP;
return RX_DROP_UNUSABLE;
}
return RX_CONTINUE;
......@@ -1435,7 +1435,7 @@ ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx)
struct ieee80211_sub_if_data *sdata;
if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
return RX_DROP;
return RX_DROP_MONITOR;
sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev);
if ((sdata->vif.type == IEEE80211_IF_TYPE_STA ||
......@@ -1443,7 +1443,7 @@ ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx)
!(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status);
else
return RX_DROP;
return RX_DROP_MONITOR;
return RX_QUEUED;
}
......@@ -1455,7 +1455,7 @@ static inline ieee80211_rx_result __ieee80211_invoke_rx_handlers(
struct sta_info *sta)
{
ieee80211_rx_handler *handler;
ieee80211_rx_result res = RX_DROP;
ieee80211_rx_result res = RX_DROP_MONITOR;
for (handler = handlers; *handler != NULL; handler++) {
res = (*handler)(rx);
......@@ -1463,7 +1463,8 @@ static inline ieee80211_rx_result __ieee80211_invoke_rx_handlers(
switch (res) {
case RX_CONTINUE:
continue;
case RX_DROP:
case RX_DROP_UNUSABLE:
case RX_DROP_MONITOR:
I802_DEBUG_INC(local->rx_handlers_drop);
if (sta)
sta->rx_dropped++;
......@@ -1475,7 +1476,7 @@ static inline ieee80211_rx_result __ieee80211_invoke_rx_handlers(
break;
}
if (res == RX_DROP)
if (res == RX_DROP_UNUSABLE || res == RX_DROP_MONITOR)
dev_kfree_skb(rx->skb);
return res;
}
......
......@@ -320,7 +320,7 @@ ieee80211_crypto_wep_decrypt(struct ieee80211_txrx_data *rx)
printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
"failed\n", rx->dev->name);
#endif /* CONFIG_MAC80211_DEBUG */
return RX_DROP;
return RX_DROP_UNUSABLE;
}
} else if (!(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED)) {
ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
......
......@@ -148,7 +148,7 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_txrx_data *rx)
if (ieee80211_get_hdr_info(skb, &sa, &da, &qos_tid, &data, &data_len)
|| data_len < MICHAEL_MIC_LEN)
return RX_DROP;
return RX_DROP_UNUSABLE;
data_len -= MICHAEL_MIC_LEN;
......@@ -162,14 +162,14 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_txrx_data *rx)
michael_mic(key, da, sa, qos_tid & 0x0f, data, data_len, mic);
if (memcmp(mic, data + data_len, MICHAEL_MIC_LEN) != 0 || wpa_test) {
if (!(rx->flags & IEEE80211_TXRXD_RXRA_MATCH))
return RX_DROP;
return RX_DROP_UNUSABLE;
printk(KERN_DEBUG "%s: invalid Michael MIC in data frame from "
"%s\n", rx->dev->name, print_mac(mac, sa));
mac80211_ev_michael_mic_failure(rx->dev, rx->key->conf.keyidx,
(void *) skb->data);
return RX_DROP;
return RX_DROP_UNUSABLE;
}
/* remove Michael MIC from payload */
......@@ -293,7 +293,7 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_txrx_data *rx)
return RX_CONTINUE;
if (!rx->sta || skb->len - hdrlen < 12)
return RX_DROP;
return RX_DROP_UNUSABLE;
if (rx->u.rx.status->flag & RX_FLAG_DECRYPTED) {
if (rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED) {
......@@ -322,7 +322,7 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_txrx_data *rx)
"frame from %s (res=%d)\n", rx->dev->name,
print_mac(mac, rx->sta->addr), res);
#endif /* CONFIG_MAC80211_DEBUG */
return RX_DROP;
return RX_DROP_UNUSABLE;
}
/* Trim ICV */
......@@ -545,7 +545,7 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_txrx_data *rx)
data_len = skb->len - hdrlen - CCMP_HDR_LEN - CCMP_MIC_LEN;
if (!rx->sta || data_len < 0)
return RX_DROP;
return RX_DROP_UNUSABLE;
if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) &&
(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED))
......@@ -565,7 +565,7 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_txrx_data *rx)
ppn[0], ppn[1], ppn[2], ppn[3], ppn[4], ppn[5]);
#endif /* CONFIG_MAC80211_DEBUG */
key->u.ccmp.replays++;
return RX_DROP;
return RX_DROP_UNUSABLE;
}
if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED)) {
......@@ -589,7 +589,7 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_txrx_data *rx)
"for RX frame from %s\n", rx->dev->name,
print_mac(mac, rx->sta->addr));
#endif /* CONFIG_MAC80211_DEBUG */
return RX_DROP;
return RX_DROP_UNUSABLE;
}
}
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment