From 6b77863b719a4e32909c218c0d5a83a14f4d98c5 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 23 Jul 2012 14:53:27 +0200 Subject: 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 diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 1b8d191..5583f5b 100644 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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; -- cgit v0.10.2