This patch reworks the various hardware crypto related
flags to make them more local, i.e. put them with each
key or each packet instead of into the hw struct.
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/adm8211.c | 2
drivers/net/wireless/b43/main.c | 4 -
drivers/net/wireless/b43/xmit.c | 28 -------------
drivers/net/wireless/iwl-base.c | 5 +-
drivers/net/wireless/p54common.c | 3 -
drivers/net/wireless/rtl8187_dev.c | 3 -
drivers/net/wireless/zd1211rw-mac80211/zd_mac.c | 1
include/net/mac80211.h | 49 +++++++-----------------
net/mac80211/rx.c | 24 ++++-------
net/mac80211/tx.c | 5 --
net/mac80211/wpa.c | 43 ++++++---------------
11 files changed, 49 insertions(+), 118 deletions(-)
--- wireless-dev.orig/include/net/mac80211.h 2007-08-24 14:05:53.549417211 +0200
+++ wireless-dev/include/net/mac80211.h 2007-08-24 14:06:08.249417211 +0200
@@ -243,6 +243,8 @@ struct ieee80211_rx_status {
#define RX_FLAG_MMIC_ERROR (1<<0)
#define RX_FLAG_DECRYPTED (1<<1)
#define RX_FLAG_RADIOTAP (1<<2)
+#define RX_FLAG_MMIC_STRIPPED (1<<3)
+#define RX_FLAG_IV_STRIPPED (1<<4)
int flag;
};
@@ -405,6 +407,16 @@ typedef enum {
* that situation it should reject that key.
*/
#define IEEE80211_KEY_FLAG_WMM_STA (1<<0)
+/*
+ * This flag should be set by the driver if it requires
+ * IV generation in software for this key.
+ */
+#define IEEE80211_KEY_FLAG_GENERATE_IV (1<<1)
+/*
+ * This flag should be set by the driver if it requires
+ * MMIC generation in software for this key.
+ */
+#define IEEE80211_KEY_FLAG_GENERATE_MMIC (1<<2)
struct ieee80211_key_conf {
/*
@@ -474,17 +486,7 @@ struct ieee80211_hw {
*/
#define IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE (1<<1)
- /*
- * Some devices handle decryption internally and do not
- * indicate whether the frame was encrypted (unencrypted frames
- * will be dropped by the hardware, unless specifically allowed
- * through.)
- * It is permissible to not handle all encrypted frames and fall
- * back to software encryption; however, if this flag is set
- * unencrypted frames must be dropped unless the driver is told
- * otherwise via the set_ieee8021x() callback.
- */
-#define IEEE80211_HW_DEVICE_HIDES_WEP (1<<2)
+/* hole at 2 */
/* Whether RX frames passed to ieee80211_rx() include FCS in the end */
#define IEEE80211_HW_RX_INCLUDES_FCS (1<<3)
@@ -497,32 +499,13 @@ struct ieee80211_hw {
* can fetch them with ieee80211_get_buffered_bc(). */
#define IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING (1<<4)
- /*
- * This flag is only relevant if hardware encryption is used.
- * If set, it has two meanings:
- * 1) the IV and ICV are present in received frames that have
- * been decrypted (unless IEEE80211_HW_DEVICE_HIDES_WEP is
- * also set)
- * 2) on transmission, the IV should be generated in software.
- *
- * Please let us know if you *don't* use this flag, the stack would
- * really like to be able to get the IV to keep key statistics
- * accurate.
- */
-#define IEEE80211_HW_WEP_INCLUDE_IV (1<<5)
+/* hole at 5 */
/* hole at 6 */
/* hole at 7 */
- /*
- * Some devices handle Michael MIC internally and do not include MIC in
- * the received packets passed up. This flag must be set for such
- * devices. The 'encryption' frame control bit is expected to be still
- * set in the IEEE 802.11 header with this option unlike with the
- * IEEE80211_HW_DEVICE_HIDES_WEP flag.
- */
-#define IEEE80211_HW_DEVICE_STRIPS_MIC (1<<8)
+/* hole at 8 */
/* Device is capable of performing full monitor mode even during
* normal operation. */
@@ -536,8 +519,6 @@ struct ieee80211_hw {
* specified in the device's EEPROM */
#define IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED (1<<11)
- /* calculate Michael MIC for an MSDU when doing hwcrypto */
-#define IEEE80211_HW_TKIP_INCLUDE_MMIC (1<<12)
/* Do TKIP phase1 key mixing in stack to support cards only do
* phase2 key mixing when doing hwcrypto */
#define IEEE80211_HW_TKIP_REQ_PHASE1_KEY (1<<13)
--- wireless-dev.orig/net/mac80211/wpa.c 2007-08-24 14:05:53.569417211 +0200
+++ wireless-dev/net/mac80211/wpa.c 2007-08-24 14:06:08.259417211 +0200
@@ -103,7 +103,7 @@ ieee80211_tx_h_michael_mic_add(struct ie
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
!(tx->flags & IEEE80211_TXRXD_FRAGMENTED) &&
- !(tx->local->hw.flags & IEEE80211_HW_TKIP_INCLUDE_MMIC) &&
+ !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) &&
!wpa_test) {
/* hwaccel - with no need for preallocated room for Michael MIC
*/
@@ -170,7 +170,7 @@ ieee80211_rx_h_michael_mic_verify(struct
/*
* No way to verify the MIC if the hardware stripped it
*/
- if (rx->local->hw.flags & IEEE80211_HW_DEVICE_STRIPS_MIC)
+ if (rx->u.rx.status->flag & RX_FLAG_MMIC_STRIPPED)
return TXRX_CONTINUE;
if (!rx->key || rx->key->conf.alg != ALG_TKIP ||
@@ -183,19 +183,6 @@ ieee80211_rx_h_michael_mic_verify(struct
}
#endif /* CONFIG_HOSTAPD_WPA_TESTING */
- if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) &&
- (rx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
- if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
- if (skb->len < MICHAEL_MIC_LEN)
- return TXRX_DROP;
- }
- /* Need to verify Michael MIC sometimes in software even when
- * hwaccel is used. Atheros ar5212: fragmented frames and QoS
- * frames. */
- if (!(rx->flags & IEEE80211_TXRXD_FRAGMENTED) && !wpa_test)
- goto remove_mic;
- }
-
if (ieee80211_get_hdr_info(skb, &sa, &da, &qos_tid, &data, &data_len)
|| data_len < MICHAEL_MIC_LEN)
return TXRX_DROP;
@@ -249,7 +236,6 @@ ieee80211_rx_h_michael_mic_verify(struct
return TXRX_DROP;
}
- remove_mic:
/* remove Michael MIC from payload */
skb_trim(skb, skb->len - MICHAEL_MIC_LEN);
@@ -401,7 +387,7 @@ ieee80211_tx_h_tkip_encrypt(struct ieee8
#endif /* CONFIG_HOSTAPD_WPA_TESTING */
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
+ !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) &&
!wpa_test) {
/* hwaccel - with no need for preallocated room for IV/ICV */
tx->u.tx.control->key_idx = tx->key->conf.hw_key_idx;
@@ -478,11 +464,13 @@ ieee80211_rx_h_tkip_decrypt(struct ieee8
}
#endif /* CONFIG_HOSTAPD_WPA_TESTING */
- if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) &&
- (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
- if (!(rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV)) {
- /* Hardware takes care of all processing, including
- * replay protection, so no need to continue here. */
+ if (rx->u.rx.status->flag & RX_FLAG_DECRYPTED) {
+ if (rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED) {
+ /*
+ * Hardware took care of all processing, including
+ * replay protection, and stripped the ICV/IV so
+ * we cannot do any checks here.
+ */
return TXRX_CONTINUE;
}
@@ -721,7 +709,7 @@ ieee80211_tx_h_ccmp_encrypt(struct ieee8
ieee80211_tx_set_iswep(tx);
if ((tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV)) {
+ !(tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) {
/* hwaccel - with no need for preallocated room for CCMP "
* header or MIC fields */
tx->u.tx.control->key_idx = tx->key->conf.hw_key_idx;
@@ -772,8 +760,7 @@ ieee80211_rx_h_ccmp_decrypt(struct ieee8
return TXRX_DROP;
if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) &&
- (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) &&
- !(rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV))
+ (rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED))
return TXRX_CONTINUE;
(void) ccmp_hdr2pn(pn, skb->data + hdrlen);
@@ -792,10 +779,8 @@ ieee80211_rx_h_ccmp_decrypt(struct ieee8
return TXRX_DROP;
}
- if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) &&
- (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
- /* hwaccel has already decrypted frame and verified MIC */
- } else {
+ if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED)) {
+ /* hardware didn't decrypt/verify MIC */
u8 *scratch, *b_0, *aad;
scratch = key->u.ccmp.rx_crypto_buf;
--- wireless-dev.orig/net/mac80211/rx.c 2007-08-24 14:06:02.669417211 +0200
+++ wireless-dev/net/mac80211/rx.c 2007-08-24 14:06:08.259417211 +0200
@@ -370,7 +370,8 @@ ieee80211_rx_h_load_key(struct ieee80211
* we somehow allow the driver to tell us which key
* the hardware used if this flag is set?
*/
- if (!(rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV))
+ if ((rx->u.rx.status->flag & RX_FLAG_DECRYPTED) &&
+ (rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED))
return TXRX_CONTINUE;
hdrlen = ieee80211_get_hdrlen(rx->fc);
@@ -547,8 +548,8 @@ ieee80211_rx_h_wep_weak_iv_detection(str
return TXRX_CONTINUE;
/* Check for weak IVs, if hwaccel did not remove IV from the frame */
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) ||
- !(rx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
+ if (!(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED) ||
+ !(rx->u.rx.status->flag & RX_FLAG_DECRYPTED))
if (ieee80211_wep_is_weak_iv(rx->skb, rx->key))
rx->sta->wep_weak_iv_count++;
@@ -572,15 +573,14 @@ ieee80211_rx_h_wep_decrypt(struct ieee80
return TXRX_DROP;
}
- if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
- !(rx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
+ if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED)) {
if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
if (net_ratelimit())
printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
"failed\n", rx->dev->name);
return TXRX_DROP;
}
- } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
+ } else if (!(rx->u.rx.status->flag & RX_FLAG_IV_STRIPPED)) {
ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);
/* remove ICV */
skb_trim(rx->skb, rx->skb->len - 4);
@@ -911,13 +911,10 @@ static ieee80211_txrx_result
ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
{
/*
- * Pass through unencrypted frames if the hardware might have
- * decrypted them already without telling us, but that can only
- * be true if we either didn't find a key or the found key is
- * uploaded to the hardware.
+ * Pass through unencrypted frames if the hardware has
+ * decrypted them already.
*/
- if ((rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) &&
- (!rx->key || (rx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)))
+ if (rx->u.rx.status->flag & RX_FLAG_DECRYPTED)
return TXRX_CONTINUE;
/* Drop unencrypted frames if key is set. */
@@ -1362,8 +1359,7 @@ static void ieee80211_rx_michael_mic_rep
goto ignore;
}
- if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) &&
- rx->sdata->type == IEEE80211_IF_TYPE_AP && keyidx) {
+ if (rx->sdata->type == IEEE80211_IF_TYPE_AP && keyidx) {
/* AP with Pairwise keys support should never receive Michael
* MIC errors for non-zero keyidx because these are reserved
* for group keys and only the AP is sending real multicast
--- wireless-dev.orig/net/mac80211/tx.c 2007-08-24 14:05:53.669417211 +0200
+++ wireless-dev/net/mac80211/tx.c 2007-08-24 14:06:08.269417211 +0200
@@ -541,9 +541,8 @@ static int wep_encrypt_skb(struct ieee80
return -1;
} else {
tx->u.tx.control->key_idx = tx->key->conf.hw_key_idx;
- if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
- if (ieee80211_wep_add_iv(tx->local, skb, tx->key) ==
- NULL)
+ if (tx->key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV) {
+ if (!ieee80211_wep_add_iv(tx->local, skb, tx->key))
return -1;
}
}
--- wireless-dev.orig/drivers/net/wireless/iwl-base.c 2007-08-24 14:05:53.689417211 +0200
+++ wireless-dev/drivers/net/wireless/iwl-base.c 2007-08-24 14:06:08.279417211 +0200
@@ -7906,6 +7906,8 @@ static int iwl_mac_set_key(struct ieee80
* conf->sw_decrypt = 0;
*/
IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
+
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
}
IWL_DEBUG_MAC80211("leave\n");
@@ -9134,8 +9136,7 @@ static int iwl_pci_probe(struct pci_dev
hw->max_signal = 100; /* link quality indication (%) */
/* Tell mac80211 our Tx characteristics */
- hw->flags = IEEE80211_HW_WEP_INCLUDE_IV |
- IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
+ hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
hw->queues = 4;
#if IWL == 4965
--- wireless-dev.orig/drivers/net/wireless/rtl8187_dev.c 2007-08-24 14:05:53.729417211 +0200
+++ wireless-dev/drivers/net/wireless/rtl8187_dev.c 2007-08-24 14:06:08.289417211 +0200
@@ -605,8 +605,7 @@ static int __devinit rtl8187_probe(struc
priv->modes[1].channels = priv->channels;
priv->mode = IEEE80211_IF_TYPE_MGMT;
dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
- IEEE80211_HW_RX_INCLUDES_FCS |
- IEEE80211_HW_WEP_INCLUDE_IV;
+ IEEE80211_HW_RX_INCLUDES_FCS;
dev->extra_tx_headroom = sizeof(struct rtl8187_tx_hdr);
dev->queues = 1;
dev->max_rssi = 65;
--- wireless-dev.orig/drivers/net/wireless/adm8211.c 2007-08-24 14:05:53.749417211 +0200
+++ wireless-dev/drivers/net/wireless/adm8211.c 2007-08-24 14:06:08.289417211 +0200
@@ -1953,7 +1953,7 @@ static int __devinit adm8211_probe(struc
SET_IEEE80211_PERM_ADDR(dev, perm_addr);
dev->extra_tx_headroom = sizeof(struct adm8211_tx_hdr);
- dev->flags = IEEE80211_HW_WEP_INCLUDE_IV;
+ dev->flags = 0;
// however, IEEE80211_HW_RX_INCLUDES_FCS in promisc mode
dev->channel_change_time = 1000;
--- wireless-dev.orig/drivers/net/wireless/b43/main.c 2007-08-24 14:05:53.799417211 +0200
+++ wireless-dev/drivers/net/wireless/b43/main.c 2007-08-24 14:06:08.299417211 +0200
@@ -2967,6 +2967,7 @@ static int b43_dev_set_key(struct ieee80
b43_hf_write(dev,
b43_hf_read(dev) & ~B43_HF_USEDEFKEYS);
}
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
break;
case DISABLE_KEY: {
static const u8 zero[B43_SEC_KEYSIZE] = { 0 };
@@ -3913,8 +3914,7 @@ static int b43_wireless_init(struct ssb_
/* fill hw info */
hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
- IEEE80211_HW_MONITOR_DURING_OPER |
- IEEE80211_HW_DEVICE_HIDES_WEP | IEEE80211_HW_WEP_INCLUDE_IV;
+ IEEE80211_HW_MONITOR_DURING_OPER;
hw->max_signal = 100;
hw->max_rssi = -110;
hw->max_noise = -110;
--- wireless-dev.orig/drivers/net/wireless/b43/xmit.c 2007-08-24 14:05:53.839417211 +0200
+++ wireless-dev/drivers/net/wireless/b43/xmit.c 2007-08-24 14:06:08.299417211 +0200
@@ -486,8 +486,6 @@ void b43_rx(struct b43_wldev *dev, struc
if ((macstat & B43_RX_MAC_DEC) && !(macstat & B43_RX_MAC_DECERR)) {
unsigned int keyidx;
int wlhdr_len;
- int iv_len;
- int icv_len;
keyidx = ((macstat & B43_RX_MAC_KEYIDX)
>> B43_RX_MAC_KEYIDX_SHIFT);
@@ -498,38 +496,12 @@ void b43_rx(struct b43_wldev *dev, struc
B43_WARN_ON(keyidx >= dev->max_nr_keys);
if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
- /* Remove PROTECTED flag to mark it as decrypted. */
- B43_WARN_ON(!(fctl & IEEE80211_FCTL_PROTECTED));
- fctl &= ~IEEE80211_FCTL_PROTECTED;
- wlhdr->frame_control = cpu_to_le16(fctl);
-
wlhdr_len = ieee80211_get_hdrlen(fctl);
if (unlikely(skb->len < (wlhdr_len + 3))) {
b43dbg(dev->wl,
"RX: Packet size underrun (3)\n");
goto drop;
}
- if (skb->data[wlhdr_len + 3] & (1 << 5)) {
- /* The Ext-IV Bit is set in the "KeyID"
- * octet of the IV.
- */
- iv_len = 8;
- icv_len = 8;
- } else {
- iv_len = 4;
- icv_len = 4;
- }
- if (unlikely(skb->len < (wlhdr_len + iv_len + icv_len))) {
- b43dbg(dev->wl,
- "RX: Packet size underrun (4)\n");
- goto drop;
- }
- /* Remove the IV */
- memmove(skb->data + iv_len, skb->data, wlhdr_len);
- skb_pull(skb, iv_len);
- /* Remove the ICV */
- skb_trim(skb, skb->len - icv_len);
-
status.flag |= RX_FLAG_DECRYPTED;
}
}
--- wireless-dev.orig/drivers/net/wireless/p54common.c 2007-08-24 14:05:53.859417211 +0200
+++ wireless-dev/drivers/net/wireless/p54common.c 2007-08-24 14:06:08.309417211 +0200
@@ -892,8 +892,7 @@ struct ieee80211_hw *p54_init_common(siz
priv->modes[0].num_channels = ARRAY_SIZE(p54_channels);
priv->modes[0].channels = priv->channels;
dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
- IEEE80211_HW_RX_INCLUDES_FCS |
- IEEE80211_HW_WEP_INCLUDE_IV;
+ IEEE80211_HW_RX_INCLUDES_FCS;
dev->channel_change_time = 1000; /* TODO: find actual value */
dev->max_rssi = 100;
--- wireless-dev.orig/drivers/net/wireless/zd1211rw-mac80211/zd_mac.c 2007-08-24 14:05:53.919417211 +0200
+++ wireless-dev/drivers/net/wireless/zd1211rw-mac80211/zd_mac.c 2007-08-24 14:06:08.309417211 +0200
@@ -879,7 +879,6 @@ struct ieee80211_hw *zd_mac_alloc_hw(str
mac->modes[1].channels = mac->channels;
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
- IEEE80211_HW_WEP_INCLUDE_IV |
IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED;
hw->max_rssi = 100;
hw->max_signal = 100;
--
-
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