X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fmac80211%2Fmesh_hwmp.c;h=d28acb6b1f8151e2a822ec5fc697231b5d76e698;hb=744595c847cefd6ac0eec8f66e9fba95687c3f4f;hp=7fa149e230e6fc3cfecad043ad82ae4c204611fa;hpb=f42a44494bcdf03fc851c03d438464d59c0ceaf5;p=safe%2Fjmp%2Flinux-2.6

diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 7fa149e..d28acb6 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 open80211s Ltd.
+ * Copyright (c) 2008, 2009 open80211s Ltd.
  * Author:     Luis Carlos Cobo <luisca@cozybit.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -9,6 +9,12 @@
 
 #include "mesh.h"
 
+#ifdef CONFIG_MAC80211_VERBOSE_MHWMP_DEBUG
+#define mhwmp_dbg(fmt, args...)   printk(KERN_DEBUG "Mesh HWMP: " fmt, ##args)
+#else
+#define mhwmp_dbg(fmt, args...)   do { (void)(0); } while (0)
+#endif
+
 #define TEST_FRAME_LEN	8192
 #define MAX_METRIC	0xffffffff
 #define ARITH_SHIFT	8
@@ -21,6 +27,12 @@
 #define MP_F_DO	0x1
 /* Reply and forward */
 #define MP_F_RF	0x2
+/* Unknown Sequence Number */
+#define MP_F_USN    0x01
+/* Reason code Present */
+#define MP_F_RCODE  0x02
+
+static void mesh_queue_preq(struct mesh_path *, u8);
 
 static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
 {
@@ -29,6 +41,13 @@ static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
 	return get_unaligned_le32(preq_elem + offset);
 }
 
+static inline u32 u16_field_get(u8 *preq_elem, int offset, bool ae)
+{
+	if (ae)
+		offset += 6;
+	return get_unaligned_le16(preq_elem + offset);
+}
+
 /* HWMP IE processing macros */
 #define AE_F			(1<<6)
 #define AE_F_SET(x)		(*x & AE_F)
@@ -37,54 +56,60 @@ static inline u32 u32_field_get(u8 *preq_elem, int offset, bool ae)
 #define PREQ_IE_TTL(x)		(*(x + 2))
 #define PREQ_IE_PREQ_ID(x)	u32_field_get(x, 3, 0)
 #define PREQ_IE_ORIG_ADDR(x)	(x + 7)
-#define PREQ_IE_ORIG_DSN(x)	u32_field_get(x, 13, 0);
+#define PREQ_IE_ORIG_SN(x)	u32_field_get(x, 13, 0);
 #define PREQ_IE_LIFETIME(x)	u32_field_get(x, 17, AE_F_SET(x));
 #define PREQ_IE_METRIC(x) 	u32_field_get(x, 21, AE_F_SET(x));
-#define PREQ_IE_DST_F(x)	(*(AE_F_SET(x) ? x + 32 : x + 26))
-#define PREQ_IE_DST_ADDR(x) 	(AE_F_SET(x) ? x + 33 : x + 27)
-#define PREQ_IE_DST_DSN(x) 	u32_field_get(x, 33, AE_F_SET(x));
+#define PREQ_IE_TARGET_F(x)	(*(AE_F_SET(x) ? x + 32 : x + 26))
+#define PREQ_IE_TARGET_ADDR(x) 	(AE_F_SET(x) ? x + 33 : x + 27)
+#define PREQ_IE_TARGET_SN(x) 	u32_field_get(x, 33, AE_F_SET(x));
 
 
 #define PREP_IE_FLAGS(x)	PREQ_IE_FLAGS(x)
 #define PREP_IE_HOPCOUNT(x)	PREQ_IE_HOPCOUNT(x)
 #define PREP_IE_TTL(x)		PREQ_IE_TTL(x)
 #define PREP_IE_ORIG_ADDR(x)	(x + 3)
-#define PREP_IE_ORIG_DSN(x)	u32_field_get(x, 9, 0);
+#define PREP_IE_ORIG_SN(x)	u32_field_get(x, 9, 0);
 #define PREP_IE_LIFETIME(x)	u32_field_get(x, 13, AE_F_SET(x));
 #define PREP_IE_METRIC(x)	u32_field_get(x, 17, AE_F_SET(x));
-#define PREP_IE_DST_ADDR(x)	(AE_F_SET(x) ? x + 27 : x + 21)
-#define PREP_IE_DST_DSN(x)	u32_field_get(x, 27, AE_F_SET(x));
+#define PREP_IE_TARGET_ADDR(x)	(AE_F_SET(x) ? x + 27 : x + 21)
+#define PREP_IE_TARGET_SN(x)	u32_field_get(x, 27, AE_F_SET(x));
 
-#define PERR_IE_DST_ADDR(x)	(x + 2)
-#define PERR_IE_DST_DSN(x)	u32_field_get(x, 8, 0);
+#define PERR_IE_TTL(x)		(*(x))
+#define PERR_IE_TARGET_FLAGS(x)	(*(x + 2))
+#define PERR_IE_TARGET_ADDR(x)	(x + 3)
+#define PERR_IE_TARGET_SN(x)	u32_field_get(x, 9, 0);
+#define PERR_IE_TARGET_RCODE(x)	u16_field_get(x, 13, 0);
 
-#define TU_TO_EXP_TIME(x) (jiffies + msecs_to_jiffies(x * 1024 / 1000))
 #define MSEC_TO_TU(x) (x*1000/1024)
-#define DSN_GT(x, y) ((long) (y) - (long) (x) < 0)
-#define DSN_LT(x, y) ((long) (x) - (long) (y) < 0)
+#define SN_GT(x, y) ((long) (y) - (long) (x) < 0)
+#define SN_LT(x, y) ((long) (x) - (long) (y) < 0)
 
 #define net_traversal_jiffies(s) \
-	msecs_to_jiffies(s->u.sta.mshcfg.dot11MeshHWMPnetDiameterTraversalTime)
+	msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime)
 #define default_lifetime(s) \
-	MSEC_TO_TU(s->u.sta.mshcfg.dot11MeshHWMPactivePathTimeout)
+	MSEC_TO_TU(s->u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout)
 #define min_preq_int_jiff(s) \
-	(msecs_to_jiffies(s->u.sta.mshcfg.dot11MeshHWMPpreqMinInterval))
-#define max_preq_retries(s) (s->u.sta.mshcfg.dot11MeshHWMPmaxPREQretries)
+	(msecs_to_jiffies(s->u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval))
+#define max_preq_retries(s) (s->u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries)
 #define disc_timeout_jiff(s) \
-	msecs_to_jiffies(sdata->u.sta.mshcfg.min_discovery_timeout)
+	msecs_to_jiffies(sdata->u.mesh.mshcfg.min_discovery_timeout)
 
 enum mpath_frame_type {
 	MPATH_PREQ = 0,
 	MPATH_PREP,
-	MPATH_PERR
+	MPATH_PERR,
+	MPATH_RANN
 };
 
+static const u8 broadcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+
 static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
-		u8 *orig_addr, __le32 orig_dsn, u8 dst_flags, u8 *dst,
-		__le32 dst_dsn, u8 *da, u8 hop_count, u8 ttl, __le32 lifetime,
-		__le32 metric, __le32 preq_id, struct net_device *dev)
+		u8 *orig_addr, __le32 orig_sn, u8 target_flags, u8 *target,
+		__le32 target_sn, const u8 *da, u8 hop_count, u8 ttl,
+		__le32 lifetime, __le32 metric, __le32 preq_id,
+		struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_local *local = sdata->local;
 	struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
 	struct ieee80211_mgmt *mgmt;
 	u8 *pos;
@@ -99,26 +124,35 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
 	mgmt = (struct ieee80211_mgmt *)
 		skb_put(skb, 25 + sizeof(mgmt->u.action.u.mesh_action));
 	memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.mesh_action));
-	mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
-					   IEEE80211_STYPE_ACTION);
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
 
 	memcpy(mgmt->da, da, ETH_ALEN);
-	memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
-	/* BSSID is left zeroed, wildcard value */
+	memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
+	/* BSSID == SA */
+	memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
 	mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
-	mgmt->u.action.u.mesh_action.action_code = action;
+	mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
 
 	switch (action) {
 	case MPATH_PREQ:
+		mhwmp_dbg("sending PREQ to %pM\n", target);
 		ie_len = 37;
 		pos = skb_put(skb, 2 + ie_len);
 		*pos++ = WLAN_EID_PREQ;
 		break;
 	case MPATH_PREP:
+		mhwmp_dbg("sending PREP to %pM\n", target);
 		ie_len = 31;
 		pos = skb_put(skb, 2 + ie_len);
 		*pos++ = WLAN_EID_PREP;
 		break;
+	case MPATH_RANN:
+		mhwmp_dbg("sending RANN from %pM\n", orig_addr);
+		ie_len = sizeof(struct ieee80211_rann_ie);
+		pos = skb_put(skb, 2 + ie_len);
+		*pos++ = WLAN_EID_RANN;
+		break;
 	default:
 		kfree_skb(skb);
 		return -ENOTSUPP;
@@ -134,36 +168,42 @@ static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
 	}
 	memcpy(pos, orig_addr, ETH_ALEN);
 	pos += ETH_ALEN;
-	memcpy(pos, &orig_dsn, 4);
-	pos += 4;
-	memcpy(pos, &lifetime, 4);
+	memcpy(pos, &orig_sn, 4);
 	pos += 4;
+	if (action != MPATH_RANN) {
+		memcpy(pos, &lifetime, 4);
+		pos += 4;
+	}
 	memcpy(pos, &metric, 4);
 	pos += 4;
 	if (action == MPATH_PREQ) {
 		/* destination count */
 		*pos++ = 1;
-		*pos++ = dst_flags;
+		*pos++ = target_flags;
+	}
+	if (action != MPATH_RANN) {
+		memcpy(pos, target, ETH_ALEN);
+		pos += ETH_ALEN;
+		memcpy(pos, &target_sn, 4);
 	}
-	memcpy(pos, dst, ETH_ALEN);
-	pos += ETH_ALEN;
-	memcpy(pos, &dst_dsn, 4);
 
-	ieee80211_sta_tx(dev, skb, 0);
+	ieee80211_tx_skb(sdata, skb);
 	return 0;
 }
 
 /**
  * mesh_send_path error - Sends a PERR mesh management frame
  *
- * @dst: broken destination
- * @dst_dsn: dsn of the broken destination
+ * @target: broken destination
+ * @target_sn: SN of the broken destination
+ * @target_rcode: reason code for this PERR
  * @ra: node this frame is addressed to
  */
-int mesh_path_error_tx(u8 *dst, __le32 dst_dsn, u8 *ra,
-		struct net_device *dev)
+int mesh_path_error_tx(u8 ttl, u8 *target, __le32 target_sn,
+		       __le16 target_rcode, const u8 *ra,
+		       struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_local *local = sdata->local;
 	struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
 	struct ieee80211_mgmt *mgmt;
 	u8 *pos;
@@ -178,30 +218,60 @@ int mesh_path_error_tx(u8 *dst, __le32 dst_dsn, u8 *ra,
 	mgmt = (struct ieee80211_mgmt *)
 		skb_put(skb, 25 + sizeof(mgmt->u.action.u.mesh_action));
 	memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.mesh_action));
-	mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
-					   IEEE80211_STYPE_ACTION);
+	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+					  IEEE80211_STYPE_ACTION);
 
 	memcpy(mgmt->da, ra, ETH_ALEN);
-	memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
 	/* BSSID is left zeroed, wildcard value */
 	mgmt->u.action.category = MESH_PATH_SEL_CATEGORY;
-	mgmt->u.action.u.mesh_action.action_code = MPATH_PERR;
-	ie_len = 12;
+	mgmt->u.action.u.mesh_action.action_code = MESH_PATH_SEL_ACTION;
+	ie_len = 15;
 	pos = skb_put(skb, 2 + ie_len);
 	*pos++ = WLAN_EID_PERR;
 	*pos++ = ie_len;
-	/* mode flags, reserved */
-	*pos++ = 0;
+	/* ttl */
+	*pos++ = MESH_TTL;
 	/* number of destinations */
 	*pos++ = 1;
-	memcpy(pos, dst, ETH_ALEN);
+	/*
+	 * flags bit, bit 1 is unset if we know the sequence number and
+	 * bit 2 is set if we have a reason code
+	 */
+	*pos = 0;
+	if (!target_sn)
+		*pos |= MP_F_USN;
+	if (target_rcode)
+		*pos |= MP_F_RCODE;
+	pos++;
+	memcpy(pos, target, ETH_ALEN);
 	pos += ETH_ALEN;
-	memcpy(pos, &dst_dsn, 4);
+	memcpy(pos, &target_sn, 4);
+	pos += 4;
+	memcpy(pos, &target_rcode, 2);
 
-	ieee80211_sta_tx(dev, skb, 0);
+	ieee80211_tx_skb(sdata, skb);
 	return 0;
 }
 
+void ieee80211s_update_metric(struct ieee80211_local *local,
+		struct sta_info *stainfo, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	int failed;
+
+	if (!ieee80211_is_data(hdr->frame_control))
+		return;
+
+	failed = !(txinfo->flags & IEEE80211_TX_STAT_ACK);
+
+	/* moving average, scaled to 100 */
+	stainfo->fail_avg = ((80 * stainfo->fail_avg + 5) / 100 + 20 * failed);
+	if (stainfo->fail_avg > 95)
+		mesh_plink_broken(stainfo);
+}
+
 static u32 airtime_link_metric_get(struct ieee80211_local *local,
 				   struct sta_info *sta)
 {
@@ -218,12 +288,16 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
 
 	if (sta->fail_avg >= 100)
 		return MAX_METRIC;
+
+	if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
+		return MAX_METRIC;
+
 	err = (sta->fail_avg << ARITH_SHIFT) / 100;
 
 	/* bitrate is in units of 100 Kbps, while we need rate in units of
 	 * 1Mbps. This will be corrected on tx_time computation.
 	 */
-	rate = sband->bitrates[sta->txrate_idx].bitrate;
+	rate = sband->bitrates[sta->last_tx_rate.idx].bitrate;
 	tx_time = (device_constant + 10 * test_frame_len / rate);
 	estimated_retx = ((1 << (2 * ARITH_SHIFT)) / (s_unit - err));
 	result = (tx_time * estimated_retx) >> (2 * ARITH_SHIFT) ;
@@ -233,12 +307,12 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
 /**
  * hwmp_route_info_get - Update routing info to originator and transmitter
  *
- * @dev: local mesh interface
+ * @sdata: local mesh subif
  * @mgmt: mesh management frame
  * @hwmp_ie: hwmp information element (PREP or PREQ)
  *
  * This function updates the path routing information to the originator and the
- * transmitter of a HWMP PREQ or PREP fram.
+ * transmitter of a HWMP PREQ or PREP frame.
  *
  * Returns: metric to frame originator or 0 if the frame should not be further
  * processed
@@ -246,20 +320,19 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
  * Notes: this function is the only place (besides user-provided info) where
  * path routing information is updated.
  */
-static u32 hwmp_route_info_get(struct net_device *dev,
+static u32 hwmp_route_info_get(struct ieee80211_sub_if_data *sdata,
 			    struct ieee80211_mgmt *mgmt,
-			    u8 *hwmp_ie)
+			    u8 *hwmp_ie, enum mpath_frame_type action)
 {
-	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct ieee80211_local *local = sdata->local;
 	struct mesh_path *mpath;
 	struct sta_info *sta;
 	bool fresh_info;
 	u8 *orig_addr, *ta;
-	u32 orig_dsn, orig_metric;
+	u32 orig_sn, orig_metric;
 	unsigned long orig_lifetime, exp_time;
 	u32 last_hop_metric, new_metric;
 	bool process = true;
-	u8 action = mgmt->u.action.u.mesh_action.action_code;
 
 	rcu_read_lock();
 	sta = sta_info_get(local, mgmt->sa);
@@ -275,7 +348,7 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 	switch (action) {
 	case MPATH_PREQ:
 		orig_addr = PREQ_IE_ORIG_ADDR(hwmp_ie);
-		orig_dsn = PREQ_IE_ORIG_DSN(hwmp_ie);
+		orig_sn = PREQ_IE_ORIG_SN(hwmp_ie);
 		orig_lifetime = PREQ_IE_LIFETIME(hwmp_ie);
 		orig_metric = PREQ_IE_METRIC(hwmp_ie);
 		break;
@@ -288,7 +361,7 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 		 * information from both PREQ and PREP frames.
 		 */
 		orig_addr = PREP_IE_ORIG_ADDR(hwmp_ie);
-		orig_dsn = PREP_IE_ORIG_DSN(hwmp_ie);
+		orig_sn = PREP_IE_ORIG_SN(hwmp_ie);
 		orig_lifetime = PREP_IE_LIFETIME(hwmp_ie);
 		orig_metric = PREP_IE_METRIC(hwmp_ie);
 		break;
@@ -301,22 +374,22 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 		new_metric = MAX_METRIC;
 	exp_time = TU_TO_EXP_TIME(orig_lifetime);
 
-	if (memcmp(orig_addr, dev->dev_addr, ETH_ALEN) == 0) {
+	if (memcmp(orig_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) {
 		/* This MP is the originator, we are not interested in this
 		 * frame, except for updating transmitter's path info.
 		 */
 		process = false;
 		fresh_info = false;
 	} else {
-		mpath = mesh_path_lookup(orig_addr, dev);
+		mpath = mesh_path_lookup(orig_addr, sdata);
 		if (mpath) {
 			spin_lock_bh(&mpath->state_lock);
 			if (mpath->flags & MESH_PATH_FIXED)
 				fresh_info = false;
 			else if ((mpath->flags & MESH_PATH_ACTIVE) &&
-			    (mpath->flags & MESH_PATH_DSN_VALID)) {
-				if (DSN_GT(mpath->dsn, orig_dsn) ||
-				    (mpath->dsn == orig_dsn &&
+			    (mpath->flags & MESH_PATH_SN_VALID)) {
+				if (SN_GT(mpath->sn, orig_sn) ||
+				    (mpath->sn == orig_sn &&
 				     action == MPATH_PREQ &&
 				     new_metric > mpath->metric)) {
 					process = false;
@@ -324,8 +397,8 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 				}
 			}
 		} else {
-			mesh_path_add(orig_addr, dev);
-			mpath = mesh_path_lookup(orig_addr, dev);
+			mesh_path_add(orig_addr, sdata);
+			mpath = mesh_path_lookup(orig_addr, sdata);
 			if (!mpath) {
 				rcu_read_unlock();
 				return 0;
@@ -335,9 +408,9 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 
 		if (fresh_info) {
 			mesh_path_assign_nexthop(mpath, sta);
-			mpath->flags |= MESH_PATH_DSN_VALID;
+			mpath->flags |= MESH_PATH_SN_VALID;
 			mpath->metric = new_metric;
-			mpath->dsn = orig_dsn;
+			mpath->sn = orig_sn;
 			mpath->exp_time = time_after(mpath->exp_time, exp_time)
 					  ?  mpath->exp_time : exp_time;
 			mesh_path_activate(mpath);
@@ -357,7 +430,7 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 	else {
 		fresh_info = true;
 
-		mpath = mesh_path_lookup(ta, dev);
+		mpath = mesh_path_lookup(ta, sdata);
 		if (mpath) {
 			spin_lock_bh(&mpath->state_lock);
 			if ((mpath->flags & MESH_PATH_FIXED) ||
@@ -365,8 +438,8 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 					(last_hop_metric > mpath->metric)))
 				fresh_info = false;
 		} else {
-			mesh_path_add(ta, dev);
-			mpath = mesh_path_lookup(ta, dev);
+			mesh_path_add(ta, sdata);
+			mpath = mesh_path_lookup(ta, sdata);
 			if (!mpath) {
 				rcu_read_unlock();
 				return 0;
@@ -376,7 +449,7 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 
 		if (fresh_info) {
 			mesh_path_assign_nexthop(mpath, sta);
-			mpath->flags &= ~MESH_PATH_DSN_VALID;
+			mpath->flags &= ~MESH_PATH_SN_VALID;
 			mpath->metric = last_hop_metric;
 			mpath->exp_time = time_after(mpath->exp_time, exp_time)
 					  ?  mpath->exp_time : exp_time;
@@ -392,50 +465,53 @@ static u32 hwmp_route_info_get(struct net_device *dev,
 	return process ? new_metric : 0;
 }
 
-static void hwmp_preq_frame_process(struct net_device *dev,
+static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata,
 				    struct ieee80211_mgmt *mgmt,
-				    u8 *preq_elem, u32 metric) {
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+				    u8 *preq_elem, u32 metric)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct mesh_path *mpath;
-	u8 *dst_addr, *orig_addr;
-	u8 dst_flags, ttl;
-	u32 orig_dsn, dst_dsn, lifetime;
+	u8 *target_addr, *orig_addr;
+	u8 target_flags, ttl;
+	u32 orig_sn, target_sn, lifetime;
 	bool reply = false;
 	bool forward = true;
 
-	/* Update destination DSN, if present */
-	dst_addr = PREQ_IE_DST_ADDR(preq_elem);
+	/* Update target SN, if present */
+	target_addr = PREQ_IE_TARGET_ADDR(preq_elem);
 	orig_addr = PREQ_IE_ORIG_ADDR(preq_elem);
-	dst_dsn = PREQ_IE_DST_DSN(preq_elem);
-	orig_dsn = PREQ_IE_ORIG_DSN(preq_elem);
-	dst_flags = PREQ_IE_DST_F(preq_elem);
+	target_sn = PREQ_IE_TARGET_SN(preq_elem);
+	orig_sn = PREQ_IE_ORIG_SN(preq_elem);
+	target_flags = PREQ_IE_TARGET_F(preq_elem);
+
+	mhwmp_dbg("received PREQ from %pM\n", orig_addr);
 
-	if (memcmp(dst_addr, dev->dev_addr, ETH_ALEN) == 0) {
+	if (memcmp(target_addr, sdata->dev->dev_addr, ETH_ALEN) == 0) {
+		mhwmp_dbg("PREQ is for us\n");
 		forward = false;
 		reply = true;
 		metric = 0;
-		if (time_after(jiffies, ifsta->last_dsn_update +
+		if (time_after(jiffies, ifmsh->last_sn_update +
 					net_traversal_jiffies(sdata)) ||
-		    time_before(jiffies, ifsta->last_dsn_update)) {
-			dst_dsn = ++ifsta->dsn;
-			ifsta->last_dsn_update = jiffies;
+		    time_before(jiffies, ifmsh->last_sn_update)) {
+			target_sn = ++ifmsh->sn;
+			ifmsh->last_sn_update = jiffies;
 		}
 	} else {
 		rcu_read_lock();
-		mpath = mesh_path_lookup(dst_addr, dev);
+		mpath = mesh_path_lookup(target_addr, sdata);
 		if (mpath) {
-			if ((!(mpath->flags & MESH_PATH_DSN_VALID)) ||
-					DSN_LT(mpath->dsn, dst_dsn)) {
-				mpath->dsn = dst_dsn;
-				mpath->flags &= MESH_PATH_DSN_VALID;
-			} else if ((!(dst_flags & MP_F_DO)) &&
+			if ((!(mpath->flags & MESH_PATH_SN_VALID)) ||
+					SN_LT(mpath->sn, target_sn)) {
+				mpath->sn = target_sn;
+				mpath->flags |= MESH_PATH_SN_VALID;
+			} else if ((!(target_flags & MP_F_DO)) &&
 					(mpath->flags & MESH_PATH_ACTIVE)) {
 				reply = true;
 				metric = mpath->metric;
-				dst_dsn = mpath->dsn;
-				if (dst_flags & MP_F_RF)
-					dst_flags |= MP_F_DO;
+				target_sn = mpath->sn;
+				if (target_flags & MP_F_RF)
+					target_flags |= MP_F_DO;
 				else
 					forward = false;
 			}
@@ -445,15 +521,16 @@ static void hwmp_preq_frame_process(struct net_device *dev,
 
 	if (reply) {
 		lifetime = PREQ_IE_LIFETIME(preq_elem);
-		ttl = ifsta->mshcfg.dot11MeshTTL;
-		if (ttl != 0)
-			mesh_path_sel_frame_tx(MPATH_PREP, 0, dst_addr,
-				cpu_to_le32(dst_dsn), 0, orig_addr,
-				cpu_to_le32(orig_dsn), mgmt->sa, 0, ttl,
+		ttl = ifmsh->mshcfg.dot11MeshTTL;
+		if (ttl != 0) {
+			mhwmp_dbg("replying to the PREQ\n");
+			mesh_path_sel_frame_tx(MPATH_PREP, 0, target_addr,
+				cpu_to_le32(target_sn), 0, orig_addr,
+				cpu_to_le32(orig_sn), mgmt->sa, 0, ttl,
 				cpu_to_le32(lifetime), cpu_to_le32(metric),
-				0, dev);
-		else
-			ifsta->mshstats.dropped_frames_ttl++;
+				0, sdata);
+		} else
+			ifmsh->mshstats.dropped_frames_ttl++;
 	}
 
 	if (forward) {
@@ -463,34 +540,37 @@ static void hwmp_preq_frame_process(struct net_device *dev,
 		ttl = PREQ_IE_TTL(preq_elem);
 		lifetime = PREQ_IE_LIFETIME(preq_elem);
 		if (ttl <= 1) {
-			ifsta->mshstats.dropped_frames_ttl++;
+			ifmsh->mshstats.dropped_frames_ttl++;
 			return;
 		}
+		mhwmp_dbg("forwarding the PREQ from %pM\n", orig_addr);
 		--ttl;
 		flags = PREQ_IE_FLAGS(preq_elem);
 		preq_id = PREQ_IE_PREQ_ID(preq_elem);
 		hopcount = PREQ_IE_HOPCOUNT(preq_elem) + 1;
 		mesh_path_sel_frame_tx(MPATH_PREQ, flags, orig_addr,
-				cpu_to_le32(orig_dsn), dst_flags, dst_addr,
-				cpu_to_le32(dst_dsn), dev->broadcast,
+				cpu_to_le32(orig_sn), target_flags, target_addr,
+				cpu_to_le32(target_sn), broadcast_addr,
 				hopcount, ttl, cpu_to_le32(lifetime),
 				cpu_to_le32(metric), cpu_to_le32(preq_id),
-				dev);
-		ifsta->mshstats.fwded_frames++;
+				sdata);
+		ifmsh->mshstats.fwded_mcast++;
+		ifmsh->mshstats.fwded_frames++;
 	}
 }
 
 
-static void hwmp_prep_frame_process(struct net_device *dev,
+static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
 				    struct ieee80211_mgmt *mgmt,
 				    u8 *prep_elem, u32 metric)
 {
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct mesh_path *mpath;
-	u8 *dst_addr, *orig_addr;
+	u8 *target_addr, *orig_addr;
 	u8 ttl, hopcount, flags;
 	u8 next_hop[ETH_ALEN];
-	u32 dst_dsn, orig_dsn, lifetime;
+	u32 target_sn, orig_sn, lifetime;
+
+	mhwmp_dbg("received PREP from %pM\n", PREP_IE_ORIG_ADDR(prep_elem));
 
 	/* Note that we divert from the draft nomenclature and denominate
 	 * destination to what the draft refers to as origininator. So in this
@@ -498,19 +578,19 @@ static void hwmp_prep_frame_process(struct net_device *dev,
 	 * which corresponds with the originator of the PREQ which this PREP
 	 * replies
 	 */
-	dst_addr = PREP_IE_DST_ADDR(prep_elem);
-	if (memcmp(dst_addr, dev->dev_addr, ETH_ALEN) == 0)
+	target_addr = PREP_IE_TARGET_ADDR(prep_elem);
+	if (memcmp(target_addr, sdata->dev->dev_addr, ETH_ALEN) == 0)
 		/* destination, no forwarding required */
 		return;
 
 	ttl = PREP_IE_TTL(prep_elem);
 	if (ttl <= 1) {
-		sdata->u.sta.mshstats.dropped_frames_ttl++;
+		sdata->u.mesh.mshstats.dropped_frames_ttl++;
 		return;
 	}
 
 	rcu_read_lock();
-	mpath = mesh_path_lookup(dst_addr, dev);
+	mpath = mesh_path_lookup(target_addr, sdata);
 	if (mpath)
 		spin_lock_bh(&mpath->state_lock);
 	else
@@ -519,63 +599,129 @@ static void hwmp_prep_frame_process(struct net_device *dev,
 		spin_unlock_bh(&mpath->state_lock);
 		goto fail;
 	}
-	memcpy(next_hop, mpath->next_hop->addr, ETH_ALEN);
+	memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 	spin_unlock_bh(&mpath->state_lock);
 	--ttl;
 	flags = PREP_IE_FLAGS(prep_elem);
 	lifetime = PREP_IE_LIFETIME(prep_elem);
 	hopcount = PREP_IE_HOPCOUNT(prep_elem) + 1;
 	orig_addr = PREP_IE_ORIG_ADDR(prep_elem);
-	dst_dsn = PREP_IE_DST_DSN(prep_elem);
-	orig_dsn = PREP_IE_ORIG_DSN(prep_elem);
+	target_sn = PREP_IE_TARGET_SN(prep_elem);
+	orig_sn = PREP_IE_ORIG_SN(prep_elem);
 
 	mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr,
-		cpu_to_le32(orig_dsn), 0, dst_addr,
-		cpu_to_le32(dst_dsn), mpath->next_hop->addr, hopcount, ttl,
-		cpu_to_le32(lifetime), cpu_to_le32(metric),
-		0, dev);
+		cpu_to_le32(orig_sn), 0, target_addr,
+		cpu_to_le32(target_sn), mpath->next_hop->sta.addr, hopcount,
+		ttl, cpu_to_le32(lifetime), cpu_to_le32(metric),
+		0, sdata);
 	rcu_read_unlock();
-	sdata->u.sta.mshstats.fwded_frames++;
+
+	sdata->u.mesh.mshstats.fwded_unicast++;
+	sdata->u.mesh.mshstats.fwded_frames++;
 	return;
 
 fail:
 	rcu_read_unlock();
-	sdata->u.sta.mshstats.dropped_frames_no_route++;
+	sdata->u.mesh.mshstats.dropped_frames_no_route++;
 	return;
 }
 
-static void hwmp_perr_frame_process(struct net_device *dev,
+static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
 			     struct ieee80211_mgmt *mgmt, u8 *perr_elem)
 {
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct mesh_path *mpath;
-	u8 *ta, *dst_addr;
-	u32 dst_dsn;
+	u8 ttl;
+	u8 *ta, *target_addr;
+	u8 target_flags;
+	u32 target_sn;
+	u16 target_rcode;
 
 	ta = mgmt->sa;
-	dst_addr = PERR_IE_DST_ADDR(perr_elem);
-	dst_dsn = PERR_IE_DST_DSN(perr_elem);
+	ttl = PERR_IE_TTL(perr_elem);
+	if (ttl <= 1) {
+		ifmsh->mshstats.dropped_frames_ttl++;
+		return;
+	}
+	ttl--;
+	target_flags = PERR_IE_TARGET_FLAGS(perr_elem);
+	target_addr = PERR_IE_TARGET_ADDR(perr_elem);
+	target_sn = PERR_IE_TARGET_SN(perr_elem);
+	target_rcode = PERR_IE_TARGET_RCODE(perr_elem);
+
 	rcu_read_lock();
-	mpath = mesh_path_lookup(dst_addr, dev);
+	mpath = mesh_path_lookup(target_addr, sdata);
 	if (mpath) {
 		spin_lock_bh(&mpath->state_lock);
 		if (mpath->flags & MESH_PATH_ACTIVE &&
-		    memcmp(ta, mpath->next_hop->addr, ETH_ALEN) == 0 &&
-		    (!(mpath->flags & MESH_PATH_DSN_VALID) ||
-		    DSN_GT(dst_dsn, mpath->dsn))) {
+		    memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 &&
+		    (!(mpath->flags & MESH_PATH_SN_VALID) ||
+		    SN_GT(target_sn, mpath->sn))) {
 			mpath->flags &= ~MESH_PATH_ACTIVE;
-			mpath->dsn = dst_dsn;
+			mpath->sn = target_sn;
 			spin_unlock_bh(&mpath->state_lock);
-			mesh_path_error_tx(dst_addr, cpu_to_le32(dst_dsn),
-					   dev->broadcast, dev);
+			mesh_path_error_tx(ttl, target_addr, cpu_to_le32(target_sn),
+					   cpu_to_le16(target_rcode),
+					   broadcast_addr, sdata);
 		} else
 			spin_unlock_bh(&mpath->state_lock);
 	}
 	rcu_read_unlock();
 }
 
+static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata,
+				struct ieee80211_mgmt *mgmt,
+				struct ieee80211_rann_ie *rann)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+	struct mesh_path *mpath;
+	u8 *ta;
+	u8 ttl, flags, hopcount;
+	u8 *orig_addr;
+	u32 orig_sn, metric;
 
+	ta = mgmt->sa;
+	ttl = rann->rann_ttl;
+	if (ttl <= 1) {
+		ifmsh->mshstats.dropped_frames_ttl++;
+		return;
+	}
+	ttl--;
+	flags = rann->rann_flags;
+	orig_addr = rann->rann_addr;
+	orig_sn = rann->rann_seq;
+	hopcount = rann->rann_hopcount;
+	hopcount++;
+	metric = rann->rann_metric;
+	mhwmp_dbg("received RANN from %pM\n", orig_addr);
 
-void mesh_rx_path_sel_frame(struct net_device *dev,
+	rcu_read_lock();
+	mpath = mesh_path_lookup(orig_addr, sdata);
+	if (!mpath) {
+		mesh_path_add(orig_addr, sdata);
+		mpath = mesh_path_lookup(orig_addr, sdata);
+		if (!mpath) {
+			rcu_read_unlock();
+			sdata->u.mesh.mshstats.dropped_frames_no_route++;
+			return;
+		}
+		mesh_queue_preq(mpath,
+				PREQ_Q_F_START | PREQ_Q_F_REFRESH);
+	}
+	if (mpath->sn < orig_sn) {
+		mesh_path_sel_frame_tx(MPATH_RANN, flags, orig_addr,
+				       cpu_to_le32(orig_sn),
+				       0, NULL, 0, broadcast_addr,
+				       hopcount, ttl, 0,
+				       cpu_to_le32(metric + mpath->metric),
+				       0, sdata);
+		mpath->sn = orig_sn;
+	}
+	rcu_read_unlock();
+}
+
+
+void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
 			    struct ieee80211_mgmt *mgmt,
 			    size_t len)
 {
@@ -583,38 +729,42 @@ void mesh_rx_path_sel_frame(struct net_device *dev,
 	size_t baselen;
 	u32 last_hop_metric;
 
+	/* need action_code */
+	if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+		return;
+
 	baselen = (u8 *) mgmt->u.action.u.mesh_action.variable - (u8 *) mgmt;
 	ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable,
 			len - baselen, &elems);
 
-	switch (mgmt->u.action.u.mesh_action.action_code) {
-	case MPATH_PREQ:
-		if (!elems.preq || elems.preq_len != 37)
+	if (elems.preq) {
+		if (elems.preq_len != 37)
 			/* Right now we support just 1 destination and no AE */
 			return;
-		last_hop_metric = hwmp_route_info_get(dev, mgmt, elems.preq);
-		if (!last_hop_metric)
-			return;
-		hwmp_preq_frame_process(dev, mgmt, elems.preq, last_hop_metric);
-		break;
-	case MPATH_PREP:
-		if (!elems.prep || elems.prep_len != 31)
+		last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.preq,
+						      MPATH_PREQ);
+		if (last_hop_metric)
+			hwmp_preq_frame_process(sdata, mgmt, elems.preq,
+						last_hop_metric);
+	}
+	if (elems.prep) {
+		if (elems.prep_len != 31)
 			/* Right now we support no AE */
 			return;
-		last_hop_metric = hwmp_route_info_get(dev, mgmt, elems.prep);
-		if (!last_hop_metric)
-			return;
-		hwmp_prep_frame_process(dev, mgmt, elems.prep, last_hop_metric);
-		break;
-	case MPATH_PERR:
-		if (!elems.perr || elems.perr_len != 12)
+		last_hop_metric = hwmp_route_info_get(sdata, mgmt, elems.prep,
+						      MPATH_PREP);
+		if (last_hop_metric)
+			hwmp_prep_frame_process(sdata, mgmt, elems.prep,
+						last_hop_metric);
+	}
+	if (elems.perr) {
+		if (elems.perr_len != 15)
 			/* Right now we support only one destination per PERR */
 			return;
-		hwmp_perr_frame_process(dev, mgmt, elems.perr);
-	default:
-		return;
+		hwmp_perr_frame_process(sdata, mgmt, elems.perr);
 	}
-
+	if (elems.rann)
+		hwmp_rann_frame_process(sdata, mgmt, elems.rann);
 }
 
 /**
@@ -628,78 +778,75 @@ void mesh_rx_path_sel_frame(struct net_device *dev,
  */
 static void mesh_queue_preq(struct mesh_path *mpath, u8 flags)
 {
-	struct ieee80211_sub_if_data *sdata =
-		IEEE80211_DEV_TO_SUB_IF(mpath->dev);
-	struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+	struct ieee80211_sub_if_data *sdata = mpath->sdata;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct mesh_preq_queue *preq_node;
 
-	preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_KERNEL);
+	preq_node = kmalloc(sizeof(struct mesh_preq_queue), GFP_ATOMIC);
 	if (!preq_node) {
-		printk(KERN_DEBUG "Mesh HWMP: could not allocate PREQ node\n");
+		mhwmp_dbg("could not allocate PREQ node\n");
 		return;
 	}
 
-	spin_lock(&ifsta->mesh_preq_queue_lock);
-	if (ifsta->preq_queue_len == MAX_PREQ_QUEUE_LEN) {
-		spin_unlock(&ifsta->mesh_preq_queue_lock);
+	spin_lock(&ifmsh->mesh_preq_queue_lock);
+	if (ifmsh->preq_queue_len == MAX_PREQ_QUEUE_LEN) {
+		spin_unlock(&ifmsh->mesh_preq_queue_lock);
 		kfree(preq_node);
 		if (printk_ratelimit())
-			printk(KERN_DEBUG "Mesh HWMP: PREQ node queue full\n");
+			mhwmp_dbg("PREQ node queue full\n");
 		return;
 	}
 
 	memcpy(preq_node->dst, mpath->dst, ETH_ALEN);
 	preq_node->flags = flags;
 
-	list_add_tail(&preq_node->list, &ifsta->preq_queue.list);
-	++ifsta->preq_queue_len;
-	spin_unlock(&ifsta->mesh_preq_queue_lock);
+	list_add_tail(&preq_node->list, &ifmsh->preq_queue.list);
+	++ifmsh->preq_queue_len;
+	spin_unlock(&ifmsh->mesh_preq_queue_lock);
 
-	if (time_after(jiffies, ifsta->last_preq + min_preq_int_jiff(sdata)))
-		queue_work(sdata->local->hw.workqueue, &ifsta->work);
+	if (time_after(jiffies, ifmsh->last_preq + min_preq_int_jiff(sdata)))
+		ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
 
-	else if (time_before(jiffies, ifsta->last_preq)) {
+	else if (time_before(jiffies, ifmsh->last_preq)) {
 		/* avoid long wait if did not send preqs for a long time
 		 * and jiffies wrapped around
 		 */
-		ifsta->last_preq = jiffies - min_preq_int_jiff(sdata) - 1;
-		queue_work(sdata->local->hw.workqueue, &ifsta->work);
+		ifmsh->last_preq = jiffies - min_preq_int_jiff(sdata) - 1;
+		ieee80211_queue_work(&sdata->local->hw, &ifmsh->work);
 	} else
-		mod_timer(&ifsta->mesh_path_timer, ifsta->last_preq +
+		mod_timer(&ifmsh->mesh_path_timer, ifmsh->last_preq +
 						min_preq_int_jiff(sdata));
 }
 
 /**
  * mesh_path_start_discovery - launch a path discovery from the PREQ queue
  *
- * @dev: local mesh interface
+ * @sdata: local mesh subif
  */
-void mesh_path_start_discovery(struct net_device *dev)
+void mesh_path_start_discovery(struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_sub_if_data *sdata =
-		IEEE80211_DEV_TO_SUB_IF(dev);
-	struct ieee80211_if_sta *ifsta = &sdata->u.sta;
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct mesh_preq_queue *preq_node;
 	struct mesh_path *mpath;
-	u8 ttl, dst_flags;
+	u8 ttl, target_flags;
 	u32 lifetime;
 
-	spin_lock(&ifsta->mesh_preq_queue_lock);
-	if (!ifsta->preq_queue_len ||
-		time_before(jiffies, ifsta->last_preq +
+	spin_lock_bh(&ifmsh->mesh_preq_queue_lock);
+	if (!ifmsh->preq_queue_len ||
+		time_before(jiffies, ifmsh->last_preq +
 				min_preq_int_jiff(sdata))) {
-		spin_unlock(&ifsta->mesh_preq_queue_lock);
+		spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
 		return;
 	}
 
-	preq_node = list_first_entry(&ifsta->preq_queue.list,
+	preq_node = list_first_entry(&ifmsh->preq_queue.list,
 			struct mesh_preq_queue, list);
 	list_del(&preq_node->list);
-	--ifsta->preq_queue_len;
-	spin_unlock(&ifsta->mesh_preq_queue_lock);
+	--ifmsh->preq_queue_len;
+	spin_unlock_bh(&ifmsh->mesh_preq_queue_lock);
 
 	rcu_read_lock();
-	mpath = mesh_path_lookup(preq_node->dst, dev);
+	mpath = mesh_path_lookup(preq_node->dst, sdata);
 	if (!mpath)
 		goto enddiscovery;
 
@@ -721,33 +868,33 @@ void mesh_path_start_discovery(struct net_device *dev)
 		goto enddiscovery;
 	}
 
-	ifsta->last_preq = jiffies;
+	ifmsh->last_preq = jiffies;
 
-	if (time_after(jiffies, ifsta->last_dsn_update +
+	if (time_after(jiffies, ifmsh->last_sn_update +
 				net_traversal_jiffies(sdata)) ||
-	    time_before(jiffies, ifsta->last_dsn_update)) {
-		++ifsta->dsn;
-		sdata->u.sta.last_dsn_update = jiffies;
+	    time_before(jiffies, ifmsh->last_sn_update)) {
+		++ifmsh->sn;
+		sdata->u.mesh.last_sn_update = jiffies;
 	}
 	lifetime = default_lifetime(sdata);
-	ttl = sdata->u.sta.mshcfg.dot11MeshTTL;
+	ttl = sdata->u.mesh.mshcfg.dot11MeshTTL;
 	if (ttl == 0) {
-		sdata->u.sta.mshstats.dropped_frames_ttl++;
+		sdata->u.mesh.mshstats.dropped_frames_ttl++;
 		spin_unlock_bh(&mpath->state_lock);
 		goto enddiscovery;
 	}
 
 	if (preq_node->flags & PREQ_Q_F_REFRESH)
-		dst_flags = MP_F_DO;
+		target_flags = MP_F_DO;
 	else
-		dst_flags = MP_F_RF;
+		target_flags = MP_F_RF;
 
 	spin_unlock_bh(&mpath->state_lock);
-	mesh_path_sel_frame_tx(MPATH_PREQ, 0, dev->dev_addr,
-			cpu_to_le32(ifsta->dsn), dst_flags, mpath->dst,
-			cpu_to_le32(mpath->dsn), dev->broadcast, 0,
+	mesh_path_sel_frame_tx(MPATH_PREQ, 0, sdata->dev->dev_addr,
+			cpu_to_le32(ifmsh->sn), target_flags, mpath->dst,
+			cpu_to_le32(mpath->sn), broadcast_addr, 0,
 			ttl, cpu_to_le32(lifetime), 0,
-			cpu_to_le32(ifsta->preq_id++), dev);
+			cpu_to_le32(ifmsh->preq_id++), sdata);
 	mod_timer(&mpath->timer, jiffies + mpath->discovery_timeout);
 
 enddiscovery:
@@ -756,65 +903,64 @@ enddiscovery:
 }
 
 /**
- * ieee80211s_lookup_nexthop - put the appropriate next hop on a mesh frame
+ * mesh_nexthop_lookup - put the appropriate next hop on a mesh frame
  *
- * @next_hop: output argument for next hop address
- * @skb: frame to be sent
- * @dev: network device the frame will be sent through
+ * @skb: 802.11 frame to be sent
+ * @sdata: network subif the frame will be sent through
  *
  * Returns: 0 if the next hop was found. Nonzero otherwise. If no next hop is
  * found, the function will start a path discovery and queue the frame so it is
  * sent when the path is resolved. This means the caller must not free the skb
  * in this case.
  */
-int mesh_nexthop_lookup(u8 *next_hop, struct sk_buff *skb,
-		struct net_device *dev)
+int mesh_nexthop_lookup(struct sk_buff *skb,
+			struct ieee80211_sub_if_data *sdata)
 {
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct sk_buff *skb_to_free = NULL;
 	struct mesh_path *mpath;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	u8 *target_addr = hdr->addr3;
 	int err = 0;
 
 	rcu_read_lock();
-	mpath = mesh_path_lookup(skb->data, dev);
+	mpath = mesh_path_lookup(target_addr, sdata);
 
 	if (!mpath) {
-		mesh_path_add(skb->data, dev);
-		mpath = mesh_path_lookup(skb->data, dev);
+		mesh_path_add(target_addr, sdata);
+		mpath = mesh_path_lookup(target_addr, sdata);
 		if (!mpath) {
-			dev_kfree_skb(skb);
-			sdata->u.sta.mshstats.dropped_frames_no_route++;
+			sdata->u.mesh.mshstats.dropped_frames_no_route++;
 			err = -ENOSPC;
 			goto endlookup;
 		}
 	}
 
 	if (mpath->flags & MESH_PATH_ACTIVE) {
-		if (time_after(jiffies, mpath->exp_time -
-			msecs_to_jiffies(sdata->u.sta.mshcfg.path_refresh_time))
-				&& skb->pkt_type != PACKET_OTHERHOST
-				&& !(mpath->flags & MESH_PATH_RESOLVING)
-				&& !(mpath->flags & MESH_PATH_FIXED)) {
+		if (time_after(jiffies,
+			       mpath->exp_time -
+			       msecs_to_jiffies(sdata->u.mesh.mshcfg.path_refresh_time)) &&
+		    !memcmp(sdata->dev->dev_addr, hdr->addr4, ETH_ALEN) &&
+		    !(mpath->flags & MESH_PATH_RESOLVING) &&
+		    !(mpath->flags & MESH_PATH_FIXED)) {
 			mesh_queue_preq(mpath,
 					PREQ_Q_F_START | PREQ_Q_F_REFRESH);
 		}
-		memcpy(next_hop, mpath->next_hop->addr,
-				ETH_ALEN);
+		memcpy(hdr->addr1, mpath->next_hop->sta.addr, ETH_ALEN);
 	} else {
+		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 		if (!(mpath->flags & MESH_PATH_RESOLVING)) {
 			/* Start discovery only if it is not running yet */
 			mesh_queue_preq(mpath, PREQ_Q_F_START);
 		}
 
 		if (skb_queue_len(&mpath->frame_queue) >=
-				MESH_FRAME_QUEUE_LEN) {
-			skb_to_free = mpath->frame_queue.next;
-			skb_unlink(skb_to_free, &mpath->frame_queue);
-		}
+				MESH_FRAME_QUEUE_LEN)
+			skb_to_free = skb_dequeue(&mpath->frame_queue);
 
+		info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
 		skb_queue_tail(&mpath->frame_queue, skb);
 		if (skb_to_free)
-			mesh_path_discard_frame(skb_to_free, dev);
+			mesh_path_discard_frame(skb_to_free, sdata);
 		err = -ENOENT;
 	}
 
@@ -833,8 +979,14 @@ void mesh_path_timer(unsigned long data)
 	mpath = rcu_dereference(mpath);
 	if (!mpath)
 		goto endmpathtimer;
+	sdata = mpath->sdata;
+
+	if (sdata->local->quiescing) {
+		rcu_read_unlock();
+		return;
+	}
+
 	spin_lock_bh(&mpath->state_lock);
-	sdata = IEEE80211_DEV_TO_SUB_IF(mpath->dev);
 	if (mpath->flags & MESH_PATH_RESOLVED ||
 			(!(mpath->flags & MESH_PATH_RESOLVING)))
 		mpath->flags &= ~(MESH_PATH_RESOLVING | MESH_PATH_RESOLVED);
@@ -852,3 +1004,14 @@ void mesh_path_timer(unsigned long data)
 endmpathtimer:
 	rcu_read_unlock();
 }
+
+void
+mesh_path_tx_root_frame(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
+
+	mesh_path_sel_frame_tx(MPATH_RANN, 0, sdata->dev->dev_addr,
+			       cpu_to_le32(++ifmsh->sn),
+			       0, NULL, 0, broadcast_addr,
+			       0, MESH_TTL, 0, 0, 0, sdata);
+}