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-rw-r--r--net/mac80211/mlme.c131
1 files changed, 104 insertions, 27 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 8a73de6a5f5b..2de88704278b 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -5,6 +5,7 @@
* Copyright 2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2013-2014 Intel Mobile Communications GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -172,7 +173,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
if (!(ht_cap->cap_info &
cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
- ret = IEEE80211_STA_DISABLE_40MHZ | IEEE80211_STA_DISABLE_VHT;
+ ret = IEEE80211_STA_DISABLE_40MHZ;
goto out;
}
@@ -672,6 +673,9 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
(local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
+ if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
+ capab |= WLAN_CAPABILITY_RADIO_MEASURE;
+
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
memset(mgmt, 0, 24);
memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
@@ -737,16 +741,17 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
}
}
- if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
- /* 1. power capabilities */
+ if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
+ capab & WLAN_CAPABILITY_RADIO_MEASURE) {
pos = skb_put(skb, 4);
*pos++ = WLAN_EID_PWR_CAPABILITY;
*pos++ = 2;
*pos++ = 0; /* min tx power */
/* max tx power */
*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
+ }
- /* 2. supported channels */
+ if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
/* TODO: get this in reg domain format */
pos = skb_put(skb, 2 * sband->n_channels + 2);
*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
@@ -1166,19 +1171,21 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
TU_TO_EXP_TIME(csa_ie.count * cbss->beacon_interval));
}
-static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_channel *channel,
- const u8 *country_ie, u8 country_ie_len,
- const u8 *pwr_constr_elem)
+static bool
+ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_channel *channel,
+ const u8 *country_ie, u8 country_ie_len,
+ const u8 *pwr_constr_elem,
+ int *chan_pwr, int *pwr_reduction)
{
struct ieee80211_country_ie_triplet *triplet;
int chan = ieee80211_frequency_to_channel(channel->center_freq);
- int i, chan_pwr, chan_increment, new_ap_level;
+ int i, chan_increment;
bool have_chan_pwr = false;
/* Invalid IE */
if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
- return 0;
+ return false;
triplet = (void *)(country_ie + 3);
country_ie_len -= 3;
@@ -1206,7 +1213,7 @@ static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
for (i = 0; i < triplet->chans.num_channels; i++) {
if (first_channel + i * chan_increment == chan) {
have_chan_pwr = true;
- chan_pwr = triplet->chans.max_power;
+ *chan_pwr = triplet->chans.max_power;
break;
}
}
@@ -1218,18 +1225,76 @@ static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
country_ie_len -= 3;
}
- if (!have_chan_pwr)
+ if (have_chan_pwr)
+ *pwr_reduction = *pwr_constr_elem;
+ return have_chan_pwr;
+}
+
+static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_channel *channel,
+ const u8 *cisco_dtpc_ie,
+ int *pwr_level)
+{
+ /* From practical testing, the first data byte of the DTPC element
+ * seems to contain the requested dBm level, and the CLI on Cisco
+ * APs clearly state the range is -127 to 127 dBm, which indicates
+ * a signed byte, although it seemingly never actually goes negative.
+ * The other byte seems to always be zero.
+ */
+ *pwr_level = (__s8)cisco_dtpc_ie[4];
+}
+
+static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_channel *channel,
+ struct ieee80211_mgmt *mgmt,
+ const u8 *country_ie, u8 country_ie_len,
+ const u8 *pwr_constr_ie,
+ const u8 *cisco_dtpc_ie)
+{
+ bool has_80211h_pwr = false, has_cisco_pwr = false;
+ int chan_pwr = 0, pwr_reduction_80211h = 0;
+ int pwr_level_cisco, pwr_level_80211h;
+ int new_ap_level;
+
+ if (country_ie && pwr_constr_ie &&
+ mgmt->u.probe_resp.capab_info &
+ cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT)) {
+ has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
+ sdata, channel, country_ie, country_ie_len,
+ pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
+ pwr_level_80211h =
+ max_t(int, 0, chan_pwr - pwr_reduction_80211h);
+ }
+
+ if (cisco_dtpc_ie) {
+ ieee80211_find_cisco_dtpc(
+ sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
+ has_cisco_pwr = true;
+ }
+
+ if (!has_80211h_pwr && !has_cisco_pwr)
return 0;
- new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
+ /* If we have both 802.11h and Cisco DTPC, apply both limits
+ * by picking the smallest of the two power levels advertised.
+ */
+ if (has_80211h_pwr &&
+ (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
+ sdata_info(sdata,
+ "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
+ pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
+ sdata->u.mgd.bssid);
+ new_ap_level = pwr_level_80211h;
+ } else { /* has_cisco_pwr is always true here. */
+ sdata_info(sdata,
+ "Limiting TX power to %d dBm as advertised by %pM\n",
+ pwr_level_cisco, sdata->u.mgd.bssid);
+ new_ap_level = pwr_level_cisco;
+ }
if (sdata->ap_power_level == new_ap_level)
return 0;
- sdata_info(sdata,
- "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
- new_ap_level, chan_pwr, *pwr_constr_elem,
- sdata->u.mgd.bssid);
sdata->ap_power_level = new_ap_level;
if (__ieee80211_recalc_txpower(sdata))
return BSS_CHANGED_TXPOWER;
@@ -2752,6 +2817,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
u16 capab_info, status_code, aid;
struct ieee802_11_elems elems;
+ int ac, uapsd_queues = -1;
u8 *pos;
bool reassoc;
struct cfg80211_bss *bss;
@@ -2821,9 +2887,15 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
* is set can cause the interface to go idle
*/
ieee80211_destroy_assoc_data(sdata, true);
+
+ /* get uapsd queues configuration */
+ uapsd_queues = 0;
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+ if (sdata->tx_conf[ac].uapsd)
+ uapsd_queues |= BIT(ac);
}
- cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len);
+ cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
}
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
@@ -2893,7 +2965,9 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
/*
* This is the canonical list of information elements we care about,
* the filter code also gives us all changes to the Microsoft OUI
- * (00:50:F2) vendor IE which is used for WMM which we need to track.
+ * (00:50:F2) vendor IE which is used for WMM which we need to track,
+ * as well as the DTPC IE (part of the Cisco OUI) used for signaling
+ * changes to requested client power.
*
* We implement beacon filtering in software since that means we can
* avoid processing the frame here and in cfg80211, and userspace
@@ -3199,13 +3273,11 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
rx_status->band, true);
mutex_unlock(&local->sta_mtx);
- if (elems.country_elem && elems.pwr_constr_elem &&
- mgmt->u.probe_resp.capab_info &
- cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
- changed |= ieee80211_handle_pwr_constr(sdata, chan,
- elems.country_elem,
- elems.country_elem_len,
- elems.pwr_constr_elem);
+ changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
+ elems.country_elem,
+ elems.country_elem_len,
+ elems.pwr_constr_elem,
+ elems.cisco_dtpc_elem);
ieee80211_bss_info_change_notify(sdata, changed);
}
@@ -3733,7 +3805,7 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
ifmgd->p2p_noa_index = -1;
- if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
+ if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
else
ifmgd->req_smps = IEEE80211_SMPS_OFF;
@@ -4408,6 +4480,11 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
}
+ if (req->flags & ASSOC_REQ_USE_RRM)
+ ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
+ else
+ ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
+
if (req->crypto.control_port)
ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
else
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.