From fe40cb6274988852aa5a84440d8f81c00cea4028 Mon Sep 17 00:00:00 2001 From: Ashok Nagarajan Date: Mon, 2 Apr 2012 21:21:22 -0700 Subject: [PATCH] mac80211: Check basic rates when peering 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 Signed-off-by: Thomas Pedersen Signed-off-by: John W. Linville --- 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 7b22822..133c1185 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -66,11 +66,13 @@ 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; @@ -94,6 +96,9 @@ 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_operation && (local->_oper_channel_type != @@ -656,12 +661,12 @@ 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->sa, supp_rates, sdata, &elems); - } if (ifmsh->sync_ops) ifmsh->sync_ops->rx_bcn_presp(sdata, diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index fa7d970..4ad7389 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -223,7 +223,7 @@ 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 91e2043..9c836e7 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -564,7 +564,7 @@ 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: -- 2.7.4