Differential D9357 Diff 24545 head/sys/net80211/ieee80211_input.h

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head/sys/net80211/ieee80211_input.h

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	* The routine only eliminates packets whose sequence/fragment			* The routine only eliminates packets whose sequence/fragment
	* match or are less than the last seen sequence/fragment number			* match or are less than the last seen sequence/fragment number
	* AND are retransmits It doesn't try to eliminate out of order packets.			* AND are retransmits It doesn't try to eliminate out of order packets.
	*			*
	* Since all frames after sequence number 4095 will be less than 4095			* Since all frames after sequence number 4095 will be less than 4095
	* (as the seqnum wraps), handle that special case so packets aren't			* (as the seqnum wraps), handle that special case so packets aren't
	* incorrectly dropped - ie, if the next packet is sequence number 0			* incorrectly dropped - ie, if the next packet is sequence number 0
	* but a retransmit since the initial packet didn't make it.			* but a retransmit since the initial packet didn't make it.
				*
				* XXX TODO: handle sequence number space wrapping with dropped frames;
				* especially in high interference conditions under high traffic load
				* The RX AMPDU reorder code also needs it.
				*
				* XXX TODO: update for 802.11-2012 9.3.2.10 Duplicate Detection and Recovery.
	*/			*/
	static __inline int			static __inline int
	ieee80211_check_rxseq(struct ieee80211_node ni, struct ieee80211_frame wh,			ieee80211_check_rxseq(struct ieee80211_node ni, struct ieee80211_frame wh,
	uint8_t *bssid)			uint8_t *bssid)
	{			{
	#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)			#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)
	#define SEQ_EQ(a,b) ((int)((a)-(b)) == 0)			#define SEQ_EQ(a,b) ((int)((a)-(b)) == 0)
	#define SEQNO(a) ((a) >> IEEE80211_SEQ_SEQ_SHIFT)			#define SEQNO(a) ((a) >> IEEE80211_SEQ_SEQ_SHIFT)
	#define FRAGNO(a) ((a) & IEEE80211_SEQ_FRAG_MASK)			#define FRAGNO(a) ((a) & IEEE80211_SEQ_FRAG_MASK)
	struct ieee80211vap *vap = ni->ni_vap;			struct ieee80211vap *vap = ni->ni_vap;
	uint16_t rxseq;			uint16_t rxseq;
	uint8_t type, subtype;			uint8_t type, subtype;
	uint8_t tid;			uint8_t tid;
	struct ieee80211_rx_ampdu *rap;			struct ieee80211_rx_ampdu *rap;

	rxseq = le16toh((uint16_t )wh->i_seq);			rxseq = le16toh((uint16_t )wh->i_seq);
	type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;			type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
	subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;			subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;

	/*			/*
	* Types with no sequence number (or QoS (+)Null frames)			* Types with no sequence number (or QoS (+)Null frames)
	* are always treated valid.			* are always treated valid.
	*/			*/
	if (! IEEE80211_HAS_SEQ(type, subtype))			if (! IEEE80211_HAS_SEQ(type, subtype))
				return 1;

				/*
				* Always allow multicast frames for now - QoS (any TID)
				* or not.
				*/
				if (IEEE80211_IS_MULTICAST(wh->i_addr1))
	return 1;			return 1;

	tid = ieee80211_gettid(wh);			tid = ieee80211_gettid(wh);

	/*			/*
	* Only do the HT AMPDU check for WME stations; non-WME HT stations			* Only do the HT AMPDU check for WME stations; non-WME HT stations
	* shouldn't exist outside of debugging. We should at least			* shouldn't exist outside of debugging. We should at least
	* handle that.			* handle that.
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