1 files changed, 333 insertions, 118 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index fdf432f14554..66ce96a69f31 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -20,27 +20,21 @@
 #include <linux/if_arp.h>
 #include <linux/wireless.h>
 #include <linux/bitmap.h>
+#include <linux/crc32.h>
 #include <net/net_namespace.h>
 #include <net/cfg80211.h>
 #include <net/rtnetlink.h>
 
 #include "ieee80211_i.h"
+#include "driver-ops.h"
 #include "rate.h"
 #include "mesh.h"
 #include "wme.h"
+#include "led.h"
 
 /* privid for wiphys to determine whether they belong to us or not */
 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
 
-/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
-/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
-const unsigned char rfc1042_header[] __aligned(2) =
-	{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
-
-/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
-const unsigned char bridge_tunnel_header[] __aligned(2) =
-	{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
-
 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
 {
 	struct ieee80211_local *local;
@@ -100,70 +94,6 @@ u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
 	return NULL;
 }
 
-unsigned int ieee80211_hdrlen(__le16 fc)
-{
-	unsigned int hdrlen = 24;
-
-	if (ieee80211_is_data(fc)) {
-		if (ieee80211_has_a4(fc))
-			hdrlen = 30;
-		if (ieee80211_is_data_qos(fc))
-			hdrlen += IEEE80211_QOS_CTL_LEN;
-		goto out;
-	}
-
-	if (ieee80211_is_ctl(fc)) {
-		/*
-		 * ACK and CTS are 10 bytes, all others 16. To see how
-		 * to get this condition consider
-		 *   subtype mask:   0b0000000011110000 (0x00F0)
-		 *   ACK subtype:    0b0000000011010000 (0x00D0)
-		 *   CTS subtype:    0b0000000011000000 (0x00C0)
-		 *   bits that matter:         ^^^      (0x00E0)
-		 *   value of those: 0b0000000011000000 (0x00C0)
-		 */
-		if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
-			hdrlen = 10;
-		else
-			hdrlen = 16;
-	}
-out:
-	return hdrlen;
-}
-EXPORT_SYMBOL(ieee80211_hdrlen);
-
-unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
-{
-	const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data;
-	unsigned int hdrlen;
-
-	if (unlikely(skb->len < 10))
-		return 0;
-	hdrlen = ieee80211_hdrlen(hdr->frame_control);
-	if (unlikely(hdrlen > skb->len))
-		return 0;
-	return hdrlen;
-}
-EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
-
-int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
-{
-	int ae = meshhdr->flags & IEEE80211S_FLAGS_AE;
-	/* 7.1.3.5a.2 */
-	switch (ae) {
-	case 0:
-		return 6;
-	case 1:
-		return 12;
-	case 2:
-		return 18;
-	case 3:
-		return 24;
-	default:
-		return 6;
-	}
-}
-
 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 {
 	struct sk_buff *skb = tx->skb;
@@ -411,6 +341,52 @@ void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 }
 EXPORT_SYMBOL(ieee80211_stop_queue);
 
+void ieee80211_add_pending_skb(struct ieee80211_local *local,
+			       struct sk_buff *skb)
+{
+	struct ieee80211_hw *hw = &local->hw;
+	unsigned long flags;
+	int queue = skb_get_queue_mapping(skb);
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+	__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_PENDING);
+	skb_queue_tail(&local->pending[queue], skb);
+	__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+}
+
+int ieee80211_add_pending_skbs(struct ieee80211_local *local,
+			       struct sk_buff_head *skbs)
+{
+	struct ieee80211_hw *hw = &local->hw;
+	struct sk_buff *skb;
+	unsigned long flags;
+	int queue, ret = 0, i;
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	for (i = 0; i < hw->queues; i++)
+		__ieee80211_stop_queue(hw, i,
+			IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+
+	while ((skb = skb_dequeue(skbs))) {
+		ret++;
+		queue = skb_get_queue_mapping(skb);
+		skb_queue_tail(&local->pending[queue], skb);
+	}
+
+	for (i = 0; i < hw->queues; i++) {
+		if (ret)
+			__ieee80211_stop_queue(hw, i,
+				IEEE80211_QUEUE_STOP_REASON_PENDING);
+		__ieee80211_wake_queue(hw, i,
+			IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
+	}
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+	return ret;
+}
+
 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 				    enum queue_stop_reason reason)
 {
@@ -536,8 +512,16 @@ EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 void ieee802_11_parse_elems(u8 *start, size_t len,
 			    struct ieee802_11_elems *elems)
 {
+	ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
+}
+
+u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
+			       struct ieee802_11_elems *elems,
+			       u64 filter, u32 crc)
+{
 	size_t left = len;
 	u8 *pos = start;
+	bool calc_crc = filter != 0;
 
 	memset(elems, 0, sizeof(*elems));
 	elems->ie_start = start;
@@ -551,7 +535,10 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
 		left -= 2;
 
 		if (elen > left)
-			return;
+			break;
+
+		if (calc_crc && id < 64 && (filter & BIT(id)))
+			crc = crc32_be(crc, pos - 2, elen + 2);
 
 		switch (id) {
 		case WLAN_EID_SSID:
@@ -575,8 +562,10 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
 			elems->cf_params_len = elen;
 			break;
 		case WLAN_EID_TIM:
-			elems->tim = pos;
-			elems->tim_len = elen;
+			if (elen >= sizeof(struct ieee80211_tim_ie)) {
+				elems->tim = (void *)pos;
+				elems->tim_len = elen;
+			}
 			break;
 		case WLAN_EID_IBSS_PARAMS:
 			elems->ibss_params = pos;
@@ -586,15 +575,20 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
 			elems->challenge = pos;
 			elems->challenge_len = elen;
 			break;
-		case WLAN_EID_WPA:
+		case WLAN_EID_VENDOR_SPECIFIC:
 			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 			    pos[2] == 0xf2) {
 				/* Microsoft OUI (00:50:F2) */
+
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+
 				if (pos[3] == 1) {
 					/* OUI Type 1 - WPA IE */
 					elems->wpa = pos;
 					elems->wpa_len = elen;
 				} else if (elen >= 5 && pos[3] == 2) {
+					/* OUI Type 2 - WMM IE */
 					if (pos[4] == 0) {
 						elems->wmm_info = pos;
 						elems->wmm_info_len = elen;
@@ -679,32 +673,70 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
 		left -= elen;
 		pos += elen;
 	}
+
+	return crc;
 }
 
 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_tx_queue_params qparam;
-	int i;
+	int queue;
+	bool use_11b;
+	int aCWmin, aCWmax;
 
 	if (!local->ops->conf_tx)
 		return;
 
 	memset(&qparam, 0, sizeof(qparam));
 
-	qparam.aifs = 2;
+	use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
+		 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
 
-	if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
-	    !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
-		qparam.cw_min = 31;
-	else
-		qparam.cw_min = 15;
-
-	qparam.cw_max = 1023;
-	qparam.txop = 0;
+	for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
+		/* Set defaults according to 802.11-2007 Table 7-37 */
+		aCWmax = 1023;
+		if (use_11b)
+			aCWmin = 31;
+		else
+			aCWmin = 15;
+
+		switch (queue) {
+		case 3: /* AC_BK */
+			qparam.cw_max = aCWmax;
+			qparam.cw_min = aCWmin;
+			qparam.txop = 0;
+			qparam.aifs = 7;
+			break;
+		default: /* never happens but let's not leave undefined */
+		case 2: /* AC_BE */
+			qparam.cw_max = aCWmax;
+			qparam.cw_min = aCWmin;
+			qparam.txop = 0;
+			qparam.aifs = 3;
+			break;
+		case 1: /* AC_VI */
+			qparam.cw_max = aCWmin;
+			qparam.cw_min = (aCWmin + 1) / 2 - 1;
+			if (use_11b)
+				qparam.txop = 6016/32;
+			else
+				qparam.txop = 3008/32;
+			qparam.aifs = 2;
+			break;
+		case 0: /* AC_VO */
+			qparam.cw_max = (aCWmin + 1) / 2 - 1;
+			qparam.cw_min = (aCWmin + 1) / 4 - 1;
+			if (use_11b)
+				qparam.txop = 3264/32;
+			else
+				qparam.txop = 1504/32;
+			qparam.aifs = 2;
+			break;
+		}
 
-	for (i = 0; i < local_to_hw(local)->queues; i++)
-		local->ops->conf_tx(local_to_hw(local), i, &qparam);
+		drv_conf_tx(local, queue, &qparam);
+	}
 }
 
 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
@@ -831,16 +863,73 @@ void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
 	ieee80211_tx_skb(sdata, skb, encrypt);
 }
 
+int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
+			     const u8 *ie, size_t ie_len)
+{
+	struct ieee80211_supported_band *sband;
+	u8 *pos, *supp_rates_len, *esupp_rates_len = NULL;
+	int i;
+
+	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+
+	pos = buffer;
+
+	*pos++ = WLAN_EID_SUPP_RATES;
+	supp_rates_len = pos;
+	*pos++ = 0;
+
+	for (i = 0; i < sband->n_bitrates; i++) {
+		struct ieee80211_rate *rate = &sband->bitrates[i];
+
+		if (esupp_rates_len) {
+			*esupp_rates_len += 1;
+		} else if (*supp_rates_len == 8) {
+			*pos++ = WLAN_EID_EXT_SUPP_RATES;
+			esupp_rates_len = pos;
+			*pos++ = 1;
+		} else
+			*supp_rates_len += 1;
+
+		*pos++ = rate->bitrate / 5;
+	}
+
+	if (sband->ht_cap.ht_supported) {
+		__le16 tmp = cpu_to_le16(sband->ht_cap.cap);
+
+		*pos++ = WLAN_EID_HT_CAPABILITY;
+		*pos++ = sizeof(struct ieee80211_ht_cap);
+		memset(pos, 0, sizeof(struct ieee80211_ht_cap));
+		memcpy(pos, &tmp, sizeof(u16));
+		pos += sizeof(u16);
+		/* TODO: needs a define here for << 2 */
+		*pos++ = sband->ht_cap.ampdu_factor |
+			 (sband->ht_cap.ampdu_density << 2);
+		memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
+		pos += sizeof(sband->ht_cap.mcs);
+		pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
+	}
+
+	/*
+	 * If adding more here, adjust code in main.c
+	 * that calculates local->scan_ies_len.
+	 */
+
+	if (ie) {
+		memcpy(pos, ie, ie_len);
+		pos += ie_len;
+	}
+
+	return pos - buffer;
+}
+
 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
-			      u8 *ssid, size_t ssid_len,
-			      u8 *ie, size_t ie_len)
+			      const u8 *ssid, size_t ssid_len,
+			      const u8 *ie, size_t ie_len)
 {
 	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_supported_band *sband;
 	struct sk_buff *skb;
 	struct ieee80211_mgmt *mgmt;
-	u8 *pos, *supp_rates, *esupp_rates = NULL;
-	int i;
+	u8 *pos;
 
 	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
 			    ie_len);
@@ -867,31 +956,9 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 	*pos++ = WLAN_EID_SSID;
 	*pos++ = ssid_len;
 	memcpy(pos, ssid, ssid_len);
+	pos += ssid_len;
 
-	supp_rates = skb_put(skb, 2);
-	supp_rates[0] = WLAN_EID_SUPP_RATES;
-	supp_rates[1] = 0;
-	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-
-	for (i = 0; i < sband->n_bitrates; i++) {
-		struct ieee80211_rate *rate = &sband->bitrates[i];
-		if (esupp_rates) {
-			pos = skb_put(skb, 1);
-			esupp_rates[1]++;
-		} else if (supp_rates[1] == 8) {
-			esupp_rates = skb_put(skb, 3);
-			esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
-			esupp_rates[1] = 1;
-			pos = &esupp_rates[2];
-		} else {
-			pos = skb_put(skb, 1);
-			supp_rates[1]++;
-		}
-		*pos = rate->bitrate / 5;
-	}
-
-	if (ie)
-		memcpy(skb_put(skb, ie_len), ie, ie_len);
+	skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len));
 
 	ieee80211_tx_skb(sdata, skb, 0);
 }
@@ -931,3 +998,151 @@ u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 	}
 	return supp_rates;
 }
+
+int ieee80211_reconfig(struct ieee80211_local *local)
+{
+	struct ieee80211_hw *hw = &local->hw;
+	struct ieee80211_sub_if_data *sdata;
+	struct ieee80211_if_init_conf conf;
+	struct sta_info *sta;
+	unsigned long flags;
+	int res;
+	bool from_suspend = local->suspended;
+
+	/*
+	 * We're going to start the hardware, at that point
+	 * we are no longer suspended and can RX frames.
+	 */
+	local->suspended = false;
+
+	/* restart hardware */
+	if (local->open_count) {
+		res = drv_start(local);
+
+		ieee80211_led_radio(local, true);
+	}
+
+	/* add interfaces */
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
+		    netif_running(sdata->dev)) {
+			conf.vif = &sdata->vif;
+			conf.type = sdata->vif.type;
+			conf.mac_addr = sdata->dev->dev_addr;
+			res = drv_add_interface(local, &conf);
+		}
+	}
+
+	/* add STAs back */
+	if (local->ops->sta_notify) {
+		spin_lock_irqsave(&local->sta_lock, flags);
+		list_for_each_entry(sta, &local->sta_list, list) {
+			sdata = sta->sdata;
+			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+				sdata = container_of(sdata->bss,
+					     struct ieee80211_sub_if_data,
+					     u.ap);
+
+			drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD,
+				       &sta->sta);
+		}
+		spin_unlock_irqrestore(&local->sta_lock, flags);
+	}
+
+	/* Clear Suspend state so that ADDBA requests can be processed */
+
+	rcu_read_lock();
+
+	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
+		list_for_each_entry_rcu(sta, &local->sta_list, list) {
+			clear_sta_flags(sta, WLAN_STA_SUSPEND);
+		}
+	}
+
+	rcu_read_unlock();
+
+	/* setup RTS threshold */
+	drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
+
+	/* reconfigure hardware */
+	ieee80211_hw_config(local, ~0);
+
+	netif_addr_lock_bh(local->mdev);
+	ieee80211_configure_filter(local);
+	netif_addr_unlock_bh(local->mdev);
+
+	/* Finally also reconfigure all the BSS information */
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		u32 changed = ~0;
+		if (!netif_running(sdata->dev))
+			continue;
+		switch (sdata->vif.type) {
+		case NL80211_IFTYPE_STATION:
+			/* disable beacon change bits */
+			changed &= ~(BSS_CHANGED_BEACON |
+				     BSS_CHANGED_BEACON_ENABLED);
+			/* fall through */
+		case NL80211_IFTYPE_ADHOC:
+		case NL80211_IFTYPE_AP:
+		case NL80211_IFTYPE_MESH_POINT:
+			ieee80211_bss_info_change_notify(sdata, changed);
+			break;
+		case NL80211_IFTYPE_WDS:
+			break;
+		case NL80211_IFTYPE_AP_VLAN:
+		case NL80211_IFTYPE_MONITOR:
+			/* ignore virtual */
+			break;
+		case NL80211_IFTYPE_UNSPECIFIED:
+		case __NL80211_IFTYPE_AFTER_LAST:
+			WARN_ON(1);
+			break;
+		}
+	}
+
+	/* add back keys */
+	list_for_each_entry(sdata, &local->interfaces, list)
+		if (netif_running(sdata->dev))
+			ieee80211_enable_keys(sdata);
+
+	ieee80211_wake_queues_by_reason(hw,
+			IEEE80211_QUEUE_STOP_REASON_SUSPEND);
+
+	/*
+	 * If this is for hw restart things are still running.
+	 * We may want to change that later, however.
+	 */
+	if (!from_suspend)
+		return 0;
+
+#ifdef CONFIG_PM
+	local->suspended = false;
+
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		switch(sdata->vif.type) {
+		case NL80211_IFTYPE_STATION:
+			ieee80211_sta_restart(sdata);
+			break;
+		case NL80211_IFTYPE_ADHOC:
+			ieee80211_ibss_restart(sdata);
+			break;
+		case NL80211_IFTYPE_MESH_POINT:
+			ieee80211_mesh_restart(sdata);
+			break;
+		default:
+			break;
+		}
+	}
+
+	add_timer(&local->sta_cleanup);
+
+	spin_lock_irqsave(&local->sta_lock, flags);
+	list_for_each_entry(sta, &local->sta_list, list)
+		mesh_plink_restart(sta);
+	spin_unlock_irqrestore(&local->sta_lock, flags);
+#else
+	WARN_ON(1);
+#endif
+	return 0;
+}