[[PATCH v2 1/4] mac80211: Use mandatory rates as basic rates when starting mesh

[[PATCH v2 1/4] mac80211: Use mandatory rates as basic rates when starting mesh

[Ashok Nagarajan]

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
---
 net/mac80211/mesh.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 1f82c61..56ec79d 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -579,8 +579,12 @@ void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
 	ieee80211_mesh_root_setup(ifmsh);
 	ieee80211_queue_work(&local->hw, &sdata->work);
 	sdata->vif.bss_conf.beacon_int = MESH_DEFAULT_BEACON_INTERVAL;
+	sdata->vif.bss_conf.basic_rates =
+		ieee80211_mandatory_rates(sdata->local,
+					  sdata->local->hw.conf.channel->band);
 	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON |
 						BSS_CHANGED_BEACON_ENABLED |
+						BSS_CHANGED_BASIC_RATES |
 						BSS_CHANGED_BEACON_INT);
 }
 
-- 
1.7.5.4

[[PATCH v2 2/4] mac80211: Indicate basic rates when adding rate IEs

[Ashok Nagarajan]

Basic rates are added with supported rates IE and extended supported
rates IE.

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
---
v2:
	indicate basic_rates conditionally (Johannes)
 include/net/mac80211.h    |    5 +++--
 net/mac80211/cfg.c        |   12 ++++++------
 net/mac80211/mesh_plink.c |    4 ++--
 net/mac80211/tx.c         |    4 ++--
 net/mac80211/util.c       |   18 ++++++++++++++----
 5 files changed, 27 insertions(+), 16 deletions(-)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9a012be..60f4cf4 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3704,8 +3704,9 @@ void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
 
 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif);
 
-int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb);
+int ieee80211_add_srates_ie(struct ieee80211_vif *vif,
+			    struct sk_buff *skb, bool need_basic);
 
 int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif,
-				struct sk_buff *skb);
+				struct sk_buff *skb, bool need_basic);
 #endif /* MAC80211_H */
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 75a5bcd..37f6b35 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2354,8 +2354,8 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 		tf->u.setup_req.capability =
 			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
 
-		ieee80211_add_srates_ie(&sdata->vif, skb);
-		ieee80211_add_ext_srates_ie(&sdata->vif, skb);
+		ieee80211_add_srates_ie(&sdata->vif, skb, false);
+		ieee80211_add_ext_srates_ie(&sdata->vif, skb, false);
 		ieee80211_tdls_add_ext_capab(skb);
 		break;
 	case WLAN_TDLS_SETUP_RESPONSE:
@@ -2368,8 +2368,8 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 		tf->u.setup_resp.capability =
 			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
 
-		ieee80211_add_srates_ie(&sdata->vif, skb);
-		ieee80211_add_ext_srates_ie(&sdata->vif, skb);
+		ieee80211_add_srates_ie(&sdata->vif, skb, false);
+		ieee80211_add_ext_srates_ie(&sdata->vif, skb, false);
 		ieee80211_tdls_add_ext_capab(skb);
 		break;
 	case WLAN_TDLS_SETUP_CONFIRM:
@@ -2429,8 +2429,8 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
 		mgmt->u.action.u.tdls_discover_resp.capability =
 			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata));
 
-		ieee80211_add_srates_ie(&sdata->vif, skb);
-		ieee80211_add_ext_srates_ie(&sdata->vif, skb);
+		ieee80211_add_srates_ie(&sdata->vif, skb, false);
+		ieee80211_add_ext_srates_ie(&sdata->vif, skb, false);
 		ieee80211_tdls_add_ext_capab(skb);
 		break;
 	default:
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 8ba5f5e..e1a5fc4 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -212,8 +212,8 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 			pos = skb_put(skb, 2);
 			memcpy(pos + 2, &plid, 2);
 		}
-		if (ieee80211_add_srates_ie(&sdata->vif, skb) ||
-		    ieee80211_add_ext_srates_ie(&sdata->vif, skb) ||
+		if (ieee80211_add_srates_ie(&sdata->vif, skb, true) ||
+		    ieee80211_add_ext_srates_ie(&sdata->vif, skb, true) ||
 		    mesh_add_rsn_ie(skb, sdata) ||
 		    mesh_add_meshid_ie(skb, sdata) ||
 		    mesh_add_meshconf_ie(skb, sdata))
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 782a601..196cc58 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2414,9 +2414,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
 		*pos++ = WLAN_EID_SSID;
 		*pos++ = 0x0;
 
-		if (ieee80211_add_srates_ie(&sdata->vif, skb) ||
+		if (ieee80211_add_srates_ie(&sdata->vif, skb, true) ||
 		    mesh_add_ds_params_ie(skb, sdata) ||
-		    ieee80211_add_ext_srates_ie(&sdata->vif, skb) ||
+		    ieee80211_add_ext_srates_ie(&sdata->vif, skb, true) ||
 		    mesh_add_rsn_ie(skb, sdata) ||
 		    mesh_add_ht_cap_ie(skb, sdata) ||
 		    mesh_add_ht_info_ie(skb, sdata) ||
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 32f7a3b..ca5aa32 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1678,13 +1678,15 @@ ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info)
 	return channel_type;
 }
 
-int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
+int ieee80211_add_srates_ie(struct ieee80211_vif *vif,
+			    struct sk_buff *skb, bool need_basic)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_supported_band *sband;
 	int rate;
 	u8 i, rates, *pos;
+	u32 basic_rates = vif->bss_conf.basic_rates;
 
 	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 	rates = sband->n_bitrates;
@@ -1698,20 +1700,25 @@ int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
 	*pos++ = WLAN_EID_SUPP_RATES;
 	*pos++ = rates;
 	for (i = 0; i < rates; i++) {
+		u8 basic = 0;
+		if (need_basic && basic_rates & BIT(i))
+			basic = 0x80;
 		rate = sband->bitrates[i].bitrate;
-		*pos++ = (u8) (rate / 5);
+		*pos++ = basic | (u8) (rate / 5);
 	}
 
 	return 0;
 }
 
-int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
+int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif,
+				struct sk_buff *skb, bool need_basic)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_supported_band *sband;
 	int rate;
 	u8 i, exrates, *pos;
+	u32 basic_rates = vif->bss_conf.basic_rates;
 
 	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
 	exrates = sband->n_bitrates;
@@ -1728,8 +1735,11 @@ int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
 		*pos++ = WLAN_EID_EXT_SUPP_RATES;
 		*pos++ = exrates;
 		for (i = 8; i < sband->n_bitrates; i++) {
+			u8 basic = 0;
+			if (need_basic && basic_rates & BIT(i))
+				basic = 0x80;
 			rate = sband->bitrates[i].bitrate;
-			*pos++ = (u8) (rate / 5);
+			*pos++ = basic | (u8) (rate / 5);
 		}
 	}
 	return 0;
-- 
1.7.5.4

[[PATCH v2 3/4] mac80211: Modify sta_get_rates to give basic rates

[Ashok Nagarajan]

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
---
 net/mac80211/ibss.c        |    4 ++--
 net/mac80211/ieee80211_i.h |    2 +-
 net/mac80211/mesh.c        |    5 +++--
 net/mac80211/mesh_plink.c  |    7 ++++---
 net/mac80211/util.c        |   16 +++++++++++++---
 5 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 33fd8d9..17bfb3a 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -410,7 +410,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 
 		if (elems->supp_rates) {
 			supp_rates = ieee80211_sta_get_rates(local, elems,
-							     band);
+							     band, NULL);
 			if (sta) {
 				u32 prev_rates;
 
@@ -560,7 +560,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 		       sdata->name, mgmt->bssid);
 #endif
 		ieee80211_sta_join_ibss(sdata, bss);
-		supp_rates = ieee80211_sta_get_rates(local, elems, band);
+		supp_rates = ieee80211_sta_get_rates(local, elems, band, NULL);
 		ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa,
 				       supp_rates, true);
 		rcu_read_unlock();
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index d9798a3..1cf5c03 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1460,7 +1460,7 @@ void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
 				  const u8 *supp_rates);
 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 			    struct ieee802_11_elems *elems,
-			    enum ieee80211_band band);
+			    enum ieee80211_band band, u32 *basic_rates);
 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
 			     enum ieee80211_smps_mode smps_mode);
 void ieee80211_recalc_smps(struct ieee80211_local *local);
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 56ec79d..964d8a9 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -622,7 +622,7 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_local *local = sdata->local;
 	struct ieee802_11_elems elems;
 	struct ieee80211_channel *channel;
-	u32 supp_rates = 0;
+	u32 supp_rates = 0, basic_rates = 0;
 	size_t baselen;
 	int freq;
 	enum ieee80211_band band = rx_status->band;
@@ -655,7 +655,8 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
 
 	if (elems.mesh_id && elems.mesh_config &&
 	    mesh_matches_local(&elems, sdata)) {
-		supp_rates = ieee80211_sta_get_rates(local, &elems, band);
+		supp_rates = ieee80211_sta_get_rates(local, &elems,
+						     band, &basic_rates);
 		mesh_neighbour_update(mgmt, supp_rates, sdata, &elems,
 					rx_status);
 	}
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index e1a5fc4..133f267 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -474,6 +474,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 	bool deactivated, matches_local = true;
 	u8 ie_len;
 	u8 *baseaddr;
+	u32 rates, basic_rates = 0;
 	__le16 plid, llid, reason;
 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
 	static const char *mplstates[] = {
@@ -568,6 +569,9 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 
 	/* Now we will figure out the appropriate event... */
 	event = PLINK_UNDEFINED;
+	rates = ieee80211_sta_get_rates(local, &elems,
+					rx_status->band, &basic_rates);
+
 	if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
 	    (!mesh_matches_local(&elems, sdata))) {
 		matches_local = false;
@@ -592,7 +596,6 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 		return;
 	} else if (!sta) {
 		/* ftype == WLAN_SP_MESH_PEERING_OPEN */
-		u32 rates;
 
 		rcu_read_unlock();
 
@@ -600,8 +603,6 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			mpl_dbg("Mesh plink error: no more free plinks\n");
 			return;
 		}
-
-		rates = ieee80211_sta_get_rates(local, &elems, rx_status->band);
 		sta = mesh_plink_alloc(sdata, mgmt->sa, rates, &elems);
 		if (!sta) {
 			mpl_dbg("Mesh plink error: plink table full\n");
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ca5aa32..8ae0363 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1106,7 +1106,7 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 
 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 			    struct ieee802_11_elems *elems,
-			    enum ieee80211_band band)
+			    enum ieee80211_band band, u32 *basic_rates)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_rate *bitrates;
@@ -1127,15 +1127,25 @@ u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 		     elems->ext_supp_rates_len; i++) {
 		u8 rate = 0;
 		int own_rate;
+		bool is_basic;
 		if (i < elems->supp_rates_len)
 			rate = elems->supp_rates[i];
 		else if (elems->ext_supp_rates)
 			rate = elems->ext_supp_rates
 				[i - elems->supp_rates_len];
 		own_rate = 5 * (rate & 0x7f);
-		for (j = 0; j < num_rates; j++)
-			if (bitrates[j].bitrate == own_rate)
+		is_basic = !!(rate & 0x80);
+
+		if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
+			continue;
+
+		for (j = 0; j < num_rates; j++) {
+			if (bitrates[j].bitrate == own_rate) {
 				supp_rates |= BIT(j);
+				if (basic_rates && is_basic)
+					*basic_rates |= BIT(j);
+			}
+		}
 	}
 	return supp_rates;
 }
-- 
1.7.5.4

[[PATCH v2 4/4] mac80211: Check basic rates when peering

[Ashok Nagarajan]

Section 13.2.3 of IEEE 80211s standard requires BSSBasicRateSet of mesh nodes
to be identical to establish peer link.

Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
---
 net/mac80211/mesh.c       |   15 ++++++++++-----
 net/mac80211/mesh.h       |    2 +-
 net/mac80211/mesh_plink.c |    2 +-
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 964d8a9..a67b24e 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -69,11 +69,13 @@ static void ieee80211_mesh_housekeeping_timer(unsigned long data)
  *
  * @ie: information elements of a management frame from the mesh peer
  * @sdata: local mesh subif
+ * @basic_rates: BSSBasicRateSet of the peer candidate
  *
  * This function checks if the mesh configuration of a mesh point matches the
  * local mesh configuration, i.e. if both nodes belong to the same mesh network.
  */
-bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata)
+bool mesh_matches_local(struct ieee802_11_elems *ie,
+			struct ieee80211_sub_if_data *sdata, u32 basic_rates)
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct ieee80211_local *local = sdata->local;
@@ -97,6 +99,9 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_dat
 	     (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
 		goto mismatch;
 
+	if (sdata->vif.bss_conf.basic_rates != basic_rates)
+		goto mismatch;
+
 	/* disallow peering with mismatched channel types for now */
 	/*if (ie->ht_info_elem &&
 	    (local->_oper_channel_type !=
@@ -653,13 +658,13 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
 	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
 		return;
 
+	supp_rates = ieee80211_sta_get_rates(local, &elems,
+					     band, &basic_rates);
+
 	if (elems.mesh_id && elems.mesh_config &&
-	    mesh_matches_local(&elems, sdata)) {
-		supp_rates = ieee80211_sta_get_rates(local, &elems,
-						     band, &basic_rates);
+	    mesh_matches_local(&elems, sdata, basic_rates))
 		mesh_neighbour_update(mgmt, supp_rates, sdata, &elems,
 					rx_status);
-	}
 }
 
 static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 7d5d34b..0e40c8a 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -204,7 +204,7 @@ int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
 int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr,
 		struct ieee80211_sub_if_data *sdata);
 bool mesh_matches_local(struct ieee802_11_elems *ie,
-		struct ieee80211_sub_if_data *sdata);
+			struct ieee80211_sub_if_data *sdata, u32 basic_rates);
 void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
 void mesh_mgmt_ies_add(struct sk_buff *skb,
 		struct ieee80211_sub_if_data *sdata);
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 133f267..d742355 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -573,7 +573,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 					rx_status->band, &basic_rates);
 
 	if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
-	    (!mesh_matches_local(&elems, sdata))) {
+	    (!mesh_matches_local(&elems, sdata, basic_rates))) {
 		matches_local = false;
 		switch (ftype) {
 		case WLAN_SP_MESH_PEERING_OPEN:
-- 
1.7.5.4

Re: [[PATCH v2 3/4] mac80211: Modify sta_get_rates to give basic rates

[Johannes Berg]

On Sat, 2012-03-31 at 13:32 -0700, Ashok Nagarajan wrote:

> @@ -1127,15 +1127,25 @@ u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
>  		     elems->ext_supp_rates_len; i++) {
>  		u8 rate = 0;
>  		int own_rate;
> +		bool is_basic;
>  		if (i < elems->supp_rates_len)
>  			rate = elems->supp_rates[i];
>  		else if (elems->ext_supp_rates)
>  			rate = elems->ext_supp_rates
>  				[i - elems->supp_rates_len];
>  		own_rate = 5 * (rate & 0x7f);
> -		for (j = 0; j < num_rates; j++)
> -			if (bitrates[j].bitrate == own_rate)
> +		is_basic = !!(rate & 0x80);
> +
> +		if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
> +			continue;
> +
> +		for (j = 0; j < num_rates; j++) {
> +			if (bitrates[j].bitrate == own_rate) {
>  				supp_rates |= BIT(j);
> +				if (basic_rates && is_basic)
> +					*basic_rates |= BIT(j);
> +			}
> +		}

Seems it'd be worth skipping the entire logic if basic_rates is NULL?

johannes

Re: [[PATCH v2 3/4] mac80211: Modify sta_get_rates to give basic rates

[Johannes Berg]

On Mon, 2012-04-02 at 12:37 +0200, Johannes Berg wrote:
> On Sat, 2012-03-31 at 13:32 -0700, Ashok Nagarajan wrote:
> 
> > @@ -1127,15 +1127,25 @@ u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
> >  		     elems->ext_supp_rates_len; i++) {
> >  		u8 rate = 0;
> >  		int own_rate;
> > +		bool is_basic;
> >  		if (i < elems->supp_rates_len)
> >  			rate = elems->supp_rates[i];
> >  		else if (elems->ext_supp_rates)
> >  			rate = elems->ext_supp_rates
> >  				[i - elems->supp_rates_len];
> >  		own_rate = 5 * (rate & 0x7f);
> > -		for (j = 0; j < num_rates; j++)
> > -			if (bitrates[j].bitrate == own_rate)
> > +		is_basic = !!(rate & 0x80);
> > +
> > +		if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
> > +			continue;
> > +
> > +		for (j = 0; j < num_rates; j++) {
> > +			if (bitrates[j].bitrate == own_rate) {
> >  				supp_rates |= BIT(j);
> > +				if (basic_rates && is_basic)
> > +					*basic_rates |= BIT(j);
> > +			}
> > +		}
> 
> Seems it'd be worth skipping the entire logic if basic_rates is NULL?

Oh, never mind, got confused.

johannes

Re: [[PATCH v2 4/4] mac80211: Check basic rates when peering

[Ashok Nagarajan]

Hello John,

Please do not apply this patch set as they might rise conflicts.
Version 3 is coming.

Thanks,
Ashok

On Sat, Mar 31, 2012 at 1:32 PM, Ashok Nagarajan <ashok@cozybit.com> wrote:
> Section 13.2.3 of IEEE 80211s standard requires BSSBasicRateSet of mesh nodes
> to be identical to establish peer link.
>
> Signed-off-by: Ashok Nagarajan <ashok@cozybit.com>
> Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
> ---
>  net/mac80211/mesh.c       |   15 ++++++++++-----
>  net/mac80211/mesh.h       |    2 +-
>  net/mac80211/mesh_plink.c |    2 +-
>  3 files changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
> index 964d8a9..a67b24e 100644
> --- a/net/mac80211/mesh.c
> +++ b/net/mac80211/mesh.c
> @@ -69,11 +69,13 @@ static void ieee80211_mesh_housekeeping_timer(unsigned long data)
>  *
>  * @ie: information elements of a management frame from the mesh peer
>  * @sdata: local mesh subif
> + * @basic_rates: BSSBasicRateSet of the peer candidate
>  *
>  * This function checks if the mesh configuration of a mesh point matches the
>  * local mesh configuration, i.e. if both nodes belong to the same mesh network.
>  */
> -bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_data *sdata)
> +bool mesh_matches_local(struct ieee802_11_elems *ie,
> +                       struct ieee80211_sub_if_data *sdata, u32 basic_rates)
>  {
>        struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
>        struct ieee80211_local *local = sdata->local;
> @@ -97,6 +99,9 @@ bool mesh_matches_local(struct ieee802_11_elems *ie, struct ieee80211_sub_if_dat
>             (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
>                goto mismatch;
>
> +       if (sdata->vif.bss_conf.basic_rates != basic_rates)
> +               goto mismatch;
> +
>        /* disallow peering with mismatched channel types for now */
>        /*if (ie->ht_info_elem &&
>            (local->_oper_channel_type !=
> @@ -653,13 +658,13 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
>        if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
>                return;
>
> +       supp_rates = ieee80211_sta_get_rates(local, &elems,
> +                                            band, &basic_rates);
> +
>        if (elems.mesh_id && elems.mesh_config &&
> -           mesh_matches_local(&elems, sdata)) {
> -               supp_rates = ieee80211_sta_get_rates(local, &elems,
> -                                                    band, &basic_rates);
> +           mesh_matches_local(&elems, sdata, basic_rates))
>                mesh_neighbour_update(mgmt, supp_rates, sdata, &elems,
>                                        rx_status);
> -       }
>  }
>
>  static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
> diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
> index 7d5d34b..0e40c8a 100644
> --- a/net/mac80211/mesh.h
> +++ b/net/mac80211/mesh.h
> @@ -204,7 +204,7 @@ int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
>  int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr,
>                struct ieee80211_sub_if_data *sdata);
>  bool mesh_matches_local(struct ieee802_11_elems *ie,
> -               struct ieee80211_sub_if_data *sdata);
> +                       struct ieee80211_sub_if_data *sdata, u32 basic_rates);
>  void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
>  void mesh_mgmt_ies_add(struct sk_buff *skb,
>                struct ieee80211_sub_if_data *sdata);
> diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
> index 133f267..d742355 100644
> --- a/net/mac80211/mesh_plink.c
> +++ b/net/mac80211/mesh_plink.c
> @@ -573,7 +573,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
>                                        rx_status->band, &basic_rates);
>
>        if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
> -           (!mesh_matches_local(&elems, sdata))) {
> +           (!mesh_matches_local(&elems, sdata, basic_rates))) {
>                matches_local = false;
>                switch (ftype) {
>                case WLAN_SP_MESH_PEERING_OPEN:
> --
> 1.7.5.4
>