mac80211: fix current vs. operating channel in preq/beacon

When sending probe requests, e.g. during software scanning,
these will go out on the *current* channel, so their IEs
need to be built from the current channel. At other times,
e.g. for beacons or probe request templates, the IEs will
be used on the *operating* channel and using the current
channel instead might result in errors.

Add the appropriate parameters to respect the difference.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 1b8d191..5583f5b 100644 (file)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2655,6 +2655,7 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
                               u16 status_code, struct sk_buff *skb)
 {
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+       struct ieee80211_local *local = sdata->local;
        struct ieee80211_tdls_data *tf;
 
        tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
@@ -2674,8 +2675,10 @@ 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, skb, false);
-               ieee80211_add_ext_srates_ie(sdata, skb, false);
+               ieee80211_add_srates_ie(sdata, skb, false,
+                                       local->oper_channel->band);
+               ieee80211_add_ext_srates_ie(sdata, skb, false,
+                                           local->oper_channel->band);
                ieee80211_tdls_add_ext_capab(skb);
                break;
        case WLAN_TDLS_SETUP_RESPONSE:
@@ -2688,8 +2691,10 @@ 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, skb, false);
-               ieee80211_add_ext_srates_ie(sdata, skb, false);
+               ieee80211_add_srates_ie(sdata, skb, false,
+                                       local->oper_channel->band);
+               ieee80211_add_ext_srates_ie(sdata, skb, false,
+                                           local->oper_channel->band);
                ieee80211_tdls_add_ext_capab(skb);
                break;
        case WLAN_TDLS_SETUP_CONFIRM:
@@ -2727,6 +2732,7 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
                           u16 status_code, struct sk_buff *skb)
 {
        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+       struct ieee80211_local *local = sdata->local;
        struct ieee80211_mgmt *mgmt;
 
        mgmt = (void *)skb_put(skb, 24);
@@ -2749,8 +2755,10 @@ 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, skb, false);
-               ieee80211_add_ext_srates_ie(sdata, skb, false);
+               ieee80211_add_srates_ie(sdata, skb, false,
+                                       local->oper_channel->band);
+               ieee80211_add_ext_srates_ie(sdata, skb, false,
+                                           local->oper_channel->band);
                ieee80211_tdls_add_ext_capab(skb);
                break;
        default:

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 8e65ad9..0aaad02 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1459,6 +1459,7 @@ int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
                             u8 channel);
 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
                                          u8 *dst, u32 ratemask,
+                                         struct ieee80211_channel *chan,
                                          const u8 *ssid, size_t ssid_len,
                                          const u8 *ie, size_t ie_len,
                                          bool directed);
@@ -1489,9 +1490,11 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
                               u32 cap);
 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
-                           struct sk_buff *skb, bool need_basic);
+                           struct sk_buff *skb, bool need_basic,
+                           enum ieee80211_band band);
 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
-                               struct sk_buff *skb, bool need_basic);
+                               struct sk_buff *skb, bool need_basic,
+                               enum ieee80211_band band);
 
 /* channel management */
 enum ieee80211_chan_mode {

diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index fa642c7..985b37f 100644 (file)
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -258,8 +258,10 @@ 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, skb, true) ||
-                   ieee80211_add_ext_srates_ie(sdata, skb, true) ||
+               if (ieee80211_add_srates_ie(sdata, skb, true,
+                                           local->oper_channel->band) ||
+                   ieee80211_add_ext_srates_ie(sdata, skb, true,
+                                               local->oper_channel->band) ||
                    mesh_add_rsn_ie(skb, sdata) ||
                    mesh_add_meshid_ie(skb, sdata) ||
                    mesh_add_meshconf_ie(skb, sdata))

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 2657a56..c416a08 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1683,7 +1683,9 @@ struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
                ssid_len = ssid[1];
 
        skb = ieee80211_build_probe_req(sdata, cbss->bssid,
-                                       (u32) -1, ssid + 2, ssid_len,
+                                       (u32) -1,
+                                       sdata->local->oper_channel,
+                                       ssid + 2, ssid_len,
                                        NULL, 0, true);
 
        return skb;

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 7558ba5..b559c6b 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2303,7 +2303,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
        struct ieee80211_if_ap *ap = NULL;
        struct beacon_data *beacon;
        struct ieee80211_supported_band *sband;
-       enum ieee80211_band band = local->hw.conf.channel->band;
+       enum ieee80211_band band = local->oper_channel->band;
        struct ieee80211_tx_rate_control txrc;
 
        sband = local->hw.wiphy->bands[band];
@@ -2429,9 +2429,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
                *pos++ = WLAN_EID_SSID;
                *pos++ = 0x0;
 
-               if (ieee80211_add_srates_ie(sdata, skb, true) ||
+               if (ieee80211_add_srates_ie(sdata, skb, true, band) ||
                    mesh_add_ds_params_ie(skb, sdata) ||
-                   ieee80211_add_ext_srates_ie(sdata, skb, true) ||
+                   ieee80211_add_ext_srates_ie(sdata, skb, true, band) ||
                    mesh_add_rsn_ie(skb, sdata) ||
                    mesh_add_ht_cap_ie(skb, sdata) ||
                    mesh_add_ht_oper_ie(skb, sdata) ||

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 39005ec..99e4258 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1100,6 +1100,7 @@ int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
 
 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
                                          u8 *dst, u32 ratemask,
+                                         struct ieee80211_channel *chan,
                                          const u8 *ssid, size_t ssid_len,
                                          const u8 *ie, size_t ie_len,
                                          bool directed)
@@ -1109,7 +1110,7 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
        struct ieee80211_mgmt *mgmt;
        size_t buf_len;
        u8 *buf;
-       u8 chan;
+       u8 chan_no;
 
        /* FIXME: come up with a proper value */
        buf = kmalloc(200 + ie_len, GFP_KERNEL);
@@ -1122,14 +1123,12 @@ struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
         * badly-behaved APs don't respond when this parameter is included.
         */
        if (directed)
-               chan = 0;
+               chan_no = 0;
        else
-               chan = ieee80211_frequency_to_channel(
-                       local->hw.conf.channel->center_freq);
+               chan_no = ieee80211_frequency_to_channel(chan->center_freq);
 
-       buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
-                                          local->hw.conf.channel->band,
-                                          ratemask, chan);
+       buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, chan->band,
+                                          ratemask, chan_no);
 
        skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
                                     ssid, ssid_len,
@@ -1158,7 +1157,9 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 {
        struct sk_buff *skb;
 
-       skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len,
+       skb = ieee80211_build_probe_req(sdata, dst, ratemask,
+                                       sdata->local->hw.conf.channel,
+                                       ssid, ssid_len,
                                        ie, ie_len, directed);
        if (skb) {
                if (no_cck)
@@ -1810,7 +1811,8 @@ ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
 }
 
 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
-                           struct sk_buff *skb, bool need_basic)
+                           struct sk_buff *skb, bool need_basic,
+                           enum ieee80211_band band)
 {
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_supported_band *sband;
@@ -1818,7 +1820,7 @@ int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
        u8 i, rates, *pos;
        u32 basic_rates = sdata->vif.bss_conf.basic_rates;
 
-       sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+       sband = local->hw.wiphy->bands[band];
        rates = sband->n_bitrates;
        if (rates > 8)
                rates = 8;
@@ -1841,7 +1843,8 @@ int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
 }
 
 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
-                               struct sk_buff *skb, bool need_basic)
+                               struct sk_buff *skb, bool need_basic,
+                               enum ieee80211_band band)
 {
        struct ieee80211_local *local = sdata->local;
        struct ieee80211_supported_band *sband;
@@ -1849,7 +1852,7 @@ int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
        u8 i, exrates, *pos;
        u32 basic_rates = sdata->vif.bss_conf.basic_rates;
 
-       sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+       sband = local->hw.wiphy->bands[band];
        exrates = sband->n_bitrates;
        if (exrates > 8)
                exrates -= 8;