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Commit cef0acd4 authored by David Spinadel's avatar David Spinadel Committed by Johannes Berg
Browse files

mac80211: Add RX flag to indicate ICV stripped 



Add a flag that indicates that the WEP ICV was stripped from an
RX packet, allowing the device to not transfer that if it's
already checked.

Signed-off-by: default avatarDavid Spinadel <david.spinadel@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 93be2b74

include/net/mac80211.h

+4 −1
Original line number Original line Diff line number Diff line
@@ -1017,7 +1017,7 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 
 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.

 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.

 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,

 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,

 *	verification has been done by the hardware.

 *	verification has been done by the hardware.

 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.

 * @RX_FLAG_IV_STRIPPED: The IV and ICV are stripped from this frame.

 *	If this flag is set, the stack cannot do any replay detection

 *	If this flag is set, the stack cannot do any replay detection

 *	hence the driver or hardware will have to do that.

 *	hence the driver or hardware will have to do that.

 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this

 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this
@@ -1088,6 +1088,8 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 
 * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before.

 * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before.

 *	This is used for AMSDU subframes which can have the same PN as

 *	This is used for AMSDU subframes which can have the same PN as

 *	the first subframe.

 *	the first subframe.

 * @RX_FLAG_ICV_STRIPPED: The ICV is stripped from this frame. CRC checking must

 *	be done in the hardware.

 */

 */

enum mac80211_rx_flags {

enum mac80211_rx_flags {

	RX_FLAG_MMIC_ERROR		= BIT(0),

	RX_FLAG_MMIC_ERROR		= BIT(0),
@@ -1123,6 +1125,7 @@ enum mac80211_rx_flags { 
	RX_FLAG_RADIOTAP_VENDOR_DATA	= BIT(31),

	RX_FLAG_RADIOTAP_VENDOR_DATA	= BIT(31),

	RX_FLAG_MIC_STRIPPED		= BIT_ULL(32),

	RX_FLAG_MIC_STRIPPED		= BIT_ULL(32),

	RX_FLAG_ALLOW_SAME_PN		= BIT_ULL(33),

	RX_FLAG_ALLOW_SAME_PN		= BIT_ULL(33),

	RX_FLAG_ICV_STRIPPED		= BIT_ULL(34),

};

};





#define RX_FLAG_STBC_SHIFT		26

#define RX_FLAG_STBC_SHIFT		26

net/mac80211/wep.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -293,7 +293,8 @@ ieee80211_crypto_wep_decrypt(struct ieee80211_rx_data *rx) 
			return RX_DROP_UNUSABLE;

			return RX_DROP_UNUSABLE;

		ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);

		ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key);

		/* remove ICV */

		/* remove ICV */

		if (pskb_trim(rx->skb, rx->skb->len - IEEE80211_WEP_ICV_LEN))

		if (!(status->flag & RX_FLAG_ICV_STRIPPED) &&

		    pskb_trim(rx->skb, rx->skb->len - IEEE80211_WEP_ICV_LEN))

			return RX_DROP_UNUSABLE;

			return RX_DROP_UNUSABLE;

	}

	}

net/mac80211/wpa.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -294,6 +294,7 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx) 
		return RX_DROP_UNUSABLE;

		return RX_DROP_UNUSABLE;





	/* Trim ICV */

	/* Trim ICV */

	if (!(status->flag & RX_FLAG_ICV_STRIPPED))

		skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);

		skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);





	/* Remove IV */

	/* Remove IV */