Differential D26539 Diff 77461 sys/net80211/ieee80211_superg.c

Changeset View

Standalone View

sys/net80211/ieee80211_superg.c

Show First 20 Lines • Show All 267 Lines • ▼ Show 20 Lines
* Decap the encapsulated frame pair and dispatch the first		* Decap the encapsulated frame pair and dispatch the first
* for delivery. The second frame is returned for delivery		* for delivery. The second frame is returned for delivery
* via the normal path.		* via the normal path.
*/		*/
struct mbuf *		struct mbuf *
ieee80211_ff_decap(struct ieee80211_node ni, struct mbuf m)		ieee80211_ff_decap(struct ieee80211_node ni, struct mbuf m)
{		{
#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))		#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
#define MS(x,f) (((x) & f) >> f##_S)
struct ieee80211vap *vap = ni->ni_vap;		struct ieee80211vap *vap = ni->ni_vap;
struct llc *llc;		struct llc *llc;
uint32_t ath;		uint32_t ath;
struct mbuf *n;		struct mbuf *n;
int framelen;		int framelen;

/* NB: we assume caller does this check for us */		/* NB: we assume caller does this check for us */
KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),		KASSERT(IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF),
Show All 12 Lines	if (m->m_len < FF_LLC_SIZE &&
return NULL;		return NULL;
}		}
llc = (struct llc )(mtod(m, uint8_t ) +		llc = (struct llc )(mtod(m, uint8_t ) +
sizeof(struct ether_header));		sizeof(struct ether_header));
if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))		if (llc->llc_snap.ether_type != htons(ATH_FF_ETH_TYPE))
return m;		return m;
m_adj(m, FF_LLC_SIZE);		m_adj(m, FF_LLC_SIZE);
m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);		m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {		if (_IEEE80211_MASKSHIFT(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
ni->ni_macaddr, "fast-frame",		ni->ni_macaddr, "fast-frame",
"unsupport tunnel protocol, header 0x%x", ath);		"unsupport tunnel protocol, header 0x%x", ath);
vap->iv_stats.is_ff_badhdr++;		vap->iv_stats.is_ff_badhdr++;
m_freem(m);		m_freem(m);
return NULL;		return NULL;
}		}
/* NB: skip header and alignment padding */		/* NB: skip header and alignment padding */
Show All 32 Lines	#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
n = ieee80211_decap1(n, &framelen);		n = ieee80211_decap1(n, &framelen);
if (n == NULL) {		if (n == NULL) {
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
ni->ni_macaddr, "fast-frame", "%s", "second decap failed");		ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
vap->iv_stats.is_ff_tooshort++;		vap->iv_stats.is_ff_tooshort++;
}		}
/* XXX verify framelen against mbuf contents */		/* XXX verify framelen against mbuf contents */
return n; /* 2nd delivered by caller */		return n; /* 2nd delivered by caller */
#undef MS
#undef FF_LLC_SIZE		#undef FF_LLC_SIZE
}		}

/*		/*
* Fast frame encapsulation. There must be two packets		* Fast frame encapsulation. There must be two packets
* chained with m_nextpkt. We do header adjustment for		* chained with m_nextpkt. We do header adjustment for
* each, add the tunnel encapsulation, and then concatenate		* each, add the tunnel encapsulation, and then concatenate
* the mbuf chains to form a single frame for transmission.		* the mbuf chains to form a single frame for transmission.
▲ Show 20 Lines • Show All 705 Lines • Show Last 20 Lines