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![Chun-Yeow Yeoh](/assets/img/avatar_default.png)
The csa counter has moved from sdata to beacon/presp but
it is not updated accordingly for mesh and ibss. Fix this.
Fixes: af296bdb8d
("mac80211: move csa counters from sdata to beacon/presp")
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1864 lines
50 KiB
C
1864 lines
50 KiB
C
/*
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* IBSS mode implementation
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* Copyright 2003-2008, Jouni Malinen <j@w1.fi>
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* Copyright 2004, Instant802 Networks, Inc.
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* Copyright 2005, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007, Michael Wu <flamingice@sourmilk.net>
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* Copyright 2009, Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2013-2014 Intel Mobile Communications GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/if_arp.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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#define IEEE80211_SCAN_INTERVAL (2 * HZ)
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#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
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#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
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#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
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#define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ)
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#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
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static struct beacon_data *
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ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata,
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const int beacon_int, const u32 basic_rates,
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const u16 capability, u64 tsf,
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struct cfg80211_chan_def *chandef,
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bool *have_higher_than_11mbit,
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struct cfg80211_csa_settings *csa_settings)
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{
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struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
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struct ieee80211_local *local = sdata->local;
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int rates_n = 0, i, ri;
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struct ieee80211_mgmt *mgmt;
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u8 *pos;
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struct ieee80211_supported_band *sband;
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u32 rate_flags, rates = 0, rates_added = 0;
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struct beacon_data *presp;
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int frame_len;
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int shift;
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/* Build IBSS probe response */
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frame_len = sizeof(struct ieee80211_hdr_3addr) +
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12 /* struct ieee80211_mgmt.u.beacon */ +
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2 + IEEE80211_MAX_SSID_LEN /* max SSID */ +
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2 + 8 /* max Supported Rates */ +
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3 /* max DS params */ +
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4 /* IBSS params */ +
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5 /* Channel Switch Announcement */ +
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2 + (IEEE80211_MAX_SUPP_RATES - 8) +
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2 + sizeof(struct ieee80211_ht_cap) +
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2 + sizeof(struct ieee80211_ht_operation) +
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ifibss->ie_len;
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presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL);
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if (!presp)
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return NULL;
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presp->head = (void *)(presp + 1);
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mgmt = (void *) presp->head;
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mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
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IEEE80211_STYPE_PROBE_RESP);
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eth_broadcast_addr(mgmt->da);
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memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
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memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
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mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int);
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mgmt->u.beacon.timestamp = cpu_to_le64(tsf);
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mgmt->u.beacon.capab_info = cpu_to_le16(capability);
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pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable);
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*pos++ = WLAN_EID_SSID;
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*pos++ = ifibss->ssid_len;
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memcpy(pos, ifibss->ssid, ifibss->ssid_len);
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pos += ifibss->ssid_len;
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sband = local->hw.wiphy->bands[chandef->chan->band];
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rate_flags = ieee80211_chandef_rate_flags(chandef);
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shift = ieee80211_chandef_get_shift(chandef);
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rates_n = 0;
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if (have_higher_than_11mbit)
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*have_higher_than_11mbit = false;
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for (i = 0; i < sband->n_bitrates; i++) {
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if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
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continue;
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if (sband->bitrates[i].bitrate > 110 &&
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have_higher_than_11mbit)
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*have_higher_than_11mbit = true;
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rates |= BIT(i);
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rates_n++;
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}
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*pos++ = WLAN_EID_SUPP_RATES;
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*pos++ = min_t(int, 8, rates_n);
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for (ri = 0; ri < sband->n_bitrates; ri++) {
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int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate,
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5 * (1 << shift));
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u8 basic = 0;
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if (!(rates & BIT(ri)))
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continue;
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if (basic_rates & BIT(ri))
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basic = 0x80;
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*pos++ = basic | (u8) rate;
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if (++rates_added == 8) {
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ri++; /* continue at next rate for EXT_SUPP_RATES */
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break;
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}
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}
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if (sband->band == IEEE80211_BAND_2GHZ) {
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*pos++ = WLAN_EID_DS_PARAMS;
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*pos++ = 1;
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*pos++ = ieee80211_frequency_to_channel(
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chandef->chan->center_freq);
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}
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*pos++ = WLAN_EID_IBSS_PARAMS;
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*pos++ = 2;
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/* FIX: set ATIM window based on scan results */
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*pos++ = 0;
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*pos++ = 0;
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if (csa_settings) {
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*pos++ = WLAN_EID_CHANNEL_SWITCH;
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*pos++ = 3;
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*pos++ = csa_settings->block_tx ? 1 : 0;
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*pos++ = ieee80211_frequency_to_channel(
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csa_settings->chandef.chan->center_freq);
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presp->csa_counter_offsets[0] = (pos - presp->head);
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*pos++ = csa_settings->count;
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presp->csa_current_counter = csa_settings->count;
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}
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/* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */
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if (rates_n > 8) {
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*pos++ = WLAN_EID_EXT_SUPP_RATES;
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*pos++ = rates_n - 8;
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for (; ri < sband->n_bitrates; ri++) {
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int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate,
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5 * (1 << shift));
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u8 basic = 0;
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if (!(rates & BIT(ri)))
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continue;
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if (basic_rates & BIT(ri))
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basic = 0x80;
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*pos++ = basic | (u8) rate;
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}
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}
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if (ifibss->ie_len) {
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memcpy(pos, ifibss->ie, ifibss->ie_len);
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pos += ifibss->ie_len;
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}
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/* add HT capability and information IEs */
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if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
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chandef->width != NL80211_CHAN_WIDTH_5 &&
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chandef->width != NL80211_CHAN_WIDTH_10 &&
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sband->ht_cap.ht_supported) {
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struct ieee80211_sta_ht_cap ht_cap;
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memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
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ieee80211_apply_htcap_overrides(sdata, &ht_cap);
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pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
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/*
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* Note: According to 802.11n-2009 9.13.3.1, HT Protection
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* field and RIFS Mode are reserved in IBSS mode, therefore
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* keep them at 0
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*/
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pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap,
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chandef, 0);
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/* add VHT capability and information IEs */
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if (chandef->width != NL80211_CHAN_WIDTH_20 &&
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chandef->width != NL80211_CHAN_WIDTH_40 &&
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sband->vht_cap.vht_supported) {
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pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
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sband->vht_cap.cap);
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pos = ieee80211_ie_build_vht_oper(pos, &sband->vht_cap,
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chandef);
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}
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}
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if (local->hw.queues >= IEEE80211_NUM_ACS)
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pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */
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presp->head_len = pos - presp->head;
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if (WARN_ON(presp->head_len > frame_len))
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goto error;
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return presp;
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error:
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kfree(presp);
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return NULL;
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}
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static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
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const u8 *bssid, const int beacon_int,
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struct cfg80211_chan_def *req_chandef,
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const u32 basic_rates,
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const u16 capability, u64 tsf,
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bool creator)
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{
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struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_mgmt *mgmt;
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struct cfg80211_bss *bss;
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u32 bss_change;
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struct cfg80211_chan_def chandef;
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struct ieee80211_channel *chan;
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struct beacon_data *presp;
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enum nl80211_bss_scan_width scan_width;
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bool have_higher_than_11mbit;
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bool radar_required;
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int err;
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sdata_assert_lock(sdata);
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/* Reset own TSF to allow time synchronization work. */
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drv_reset_tsf(local, sdata);
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if (!ether_addr_equal(ifibss->bssid, bssid))
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sta_info_flush(sdata);
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/* if merging, indicate to driver that we leave the old IBSS */
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if (sdata->vif.bss_conf.ibss_joined) {
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sdata->vif.bss_conf.ibss_joined = false;
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sdata->vif.bss_conf.ibss_creator = false;
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sdata->vif.bss_conf.enable_beacon = false;
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netif_carrier_off(sdata->dev);
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ieee80211_bss_info_change_notify(sdata,
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BSS_CHANGED_IBSS |
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BSS_CHANGED_BEACON_ENABLED);
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drv_leave_ibss(local, sdata);
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}
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presp = rcu_dereference_protected(ifibss->presp,
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lockdep_is_held(&sdata->wdev.mtx));
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RCU_INIT_POINTER(ifibss->presp, NULL);
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if (presp)
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kfree_rcu(presp, rcu_head);
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/* make a copy of the chandef, it could be modified below. */
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chandef = *req_chandef;
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chan = chandef.chan;
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if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef,
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NL80211_IFTYPE_ADHOC)) {
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if (chandef.width == NL80211_CHAN_WIDTH_5 ||
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chandef.width == NL80211_CHAN_WIDTH_10 ||
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chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
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chandef.width == NL80211_CHAN_WIDTH_20) {
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sdata_info(sdata,
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"Failed to join IBSS, beacons forbidden\n");
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return;
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}
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chandef.width = NL80211_CHAN_WIDTH_20;
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chandef.center_freq1 = chan->center_freq;
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/* check again for downgraded chandef */
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if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef,
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NL80211_IFTYPE_ADHOC)) {
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sdata_info(sdata,
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"Failed to join IBSS, beacons forbidden\n");
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return;
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}
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}
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err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
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&chandef, NL80211_IFTYPE_ADHOC);
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if (err < 0) {
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sdata_info(sdata,
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"Failed to join IBSS, invalid chandef\n");
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return;
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}
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if (err > 0 && !ifibss->userspace_handles_dfs) {
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sdata_info(sdata,
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"Failed to join IBSS, DFS channel without control program\n");
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return;
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}
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radar_required = err;
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mutex_lock(&local->mtx);
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if (ieee80211_vif_use_channel(sdata, &chandef,
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ifibss->fixed_channel ?
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IEEE80211_CHANCTX_SHARED :
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IEEE80211_CHANCTX_EXCLUSIVE)) {
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sdata_info(sdata, "Failed to join IBSS, no channel context\n");
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mutex_unlock(&local->mtx);
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return;
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}
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sdata->radar_required = radar_required;
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mutex_unlock(&local->mtx);
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memcpy(ifibss->bssid, bssid, ETH_ALEN);
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presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates,
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capability, tsf, &chandef,
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&have_higher_than_11mbit, NULL);
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if (!presp)
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return;
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rcu_assign_pointer(ifibss->presp, presp);
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mgmt = (void *)presp->head;
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sdata->vif.bss_conf.enable_beacon = true;
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sdata->vif.bss_conf.beacon_int = beacon_int;
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sdata->vif.bss_conf.basic_rates = basic_rates;
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sdata->vif.bss_conf.ssid_len = ifibss->ssid_len;
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memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len);
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bss_change = BSS_CHANGED_BEACON_INT;
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bss_change |= ieee80211_reset_erp_info(sdata);
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bss_change |= BSS_CHANGED_BSSID;
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bss_change |= BSS_CHANGED_BEACON;
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bss_change |= BSS_CHANGED_BEACON_ENABLED;
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bss_change |= BSS_CHANGED_BASIC_RATES;
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bss_change |= BSS_CHANGED_HT;
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bss_change |= BSS_CHANGED_IBSS;
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bss_change |= BSS_CHANGED_SSID;
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/*
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* In 5 GHz/802.11a, we can always use short slot time.
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* (IEEE 802.11-2012 18.3.8.7)
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*
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* In 2.4GHz, we must always use long slots in IBSS for compatibility
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* reasons.
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* (IEEE 802.11-2012 19.4.5)
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*
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* HT follows these specifications (IEEE 802.11-2012 20.3.18)
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*/
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sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ;
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bss_change |= BSS_CHANGED_ERP_SLOT;
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/* cf. IEEE 802.11 9.2.12 */
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if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit)
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sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
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else
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sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
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ieee80211_set_wmm_default(sdata, true);
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sdata->vif.bss_conf.ibss_joined = true;
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sdata->vif.bss_conf.ibss_creator = creator;
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err = drv_join_ibss(local, sdata);
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if (err) {
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sdata->vif.bss_conf.ibss_joined = false;
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sdata->vif.bss_conf.ibss_creator = false;
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sdata->vif.bss_conf.enable_beacon = false;
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sdata->vif.bss_conf.ssid_len = 0;
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RCU_INIT_POINTER(ifibss->presp, NULL);
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kfree_rcu(presp, rcu_head);
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mutex_lock(&local->mtx);
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ieee80211_vif_release_channel(sdata);
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mutex_unlock(&local->mtx);
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sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n",
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err);
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return;
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}
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ieee80211_bss_info_change_notify(sdata, bss_change);
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ifibss->state = IEEE80211_IBSS_MLME_JOINED;
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mod_timer(&ifibss->timer,
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round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
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scan_width = cfg80211_chandef_to_scan_width(&chandef);
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bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan,
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scan_width, mgmt,
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presp->head_len, 0, GFP_KERNEL);
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cfg80211_put_bss(local->hw.wiphy, bss);
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netif_carrier_on(sdata->dev);
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cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL);
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}
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|
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static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_bss *bss)
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{
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struct cfg80211_bss *cbss =
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container_of((void *)bss, struct cfg80211_bss, priv);
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struct ieee80211_supported_band *sband;
|
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struct cfg80211_chan_def chandef;
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u32 basic_rates;
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int i, j;
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u16 beacon_int = cbss->beacon_interval;
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const struct cfg80211_bss_ies *ies;
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enum nl80211_channel_type chan_type;
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u64 tsf;
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u32 rate_flags;
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int shift;
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|
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sdata_assert_lock(sdata);
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if (beacon_int < 10)
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beacon_int = 10;
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|
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switch (sdata->u.ibss.chandef.width) {
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case NL80211_CHAN_WIDTH_20_NOHT:
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case NL80211_CHAN_WIDTH_20:
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case NL80211_CHAN_WIDTH_40:
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chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef);
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cfg80211_chandef_create(&chandef, cbss->channel, chan_type);
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break;
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case NL80211_CHAN_WIDTH_5:
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case NL80211_CHAN_WIDTH_10:
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cfg80211_chandef_create(&chandef, cbss->channel,
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NL80211_CHAN_WIDTH_20_NOHT);
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chandef.width = sdata->u.ibss.chandef.width;
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break;
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case NL80211_CHAN_WIDTH_80:
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case NL80211_CHAN_WIDTH_160:
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chandef = sdata->u.ibss.chandef;
|
|
chandef.chan = cbss->channel;
|
|
break;
|
|
default:
|
|
/* fall back to 20 MHz for unsupported modes */
|
|
cfg80211_chandef_create(&chandef, cbss->channel,
|
|
NL80211_CHAN_WIDTH_20_NOHT);
|
|
break;
|
|
}
|
|
|
|
sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
|
|
rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef);
|
|
shift = ieee80211_vif_get_shift(&sdata->vif);
|
|
|
|
basic_rates = 0;
|
|
|
|
for (i = 0; i < bss->supp_rates_len; i++) {
|
|
int rate = bss->supp_rates[i] & 0x7f;
|
|
bool is_basic = !!(bss->supp_rates[i] & 0x80);
|
|
|
|
for (j = 0; j < sband->n_bitrates; j++) {
|
|
int brate;
|
|
if ((rate_flags & sband->bitrates[j].flags)
|
|
!= rate_flags)
|
|
continue;
|
|
|
|
brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
|
|
5 * (1 << shift));
|
|
if (brate == rate) {
|
|
if (is_basic)
|
|
basic_rates |= BIT(j);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
rcu_read_lock();
|
|
ies = rcu_dereference(cbss->ies);
|
|
tsf = ies->tsf;
|
|
rcu_read_unlock();
|
|
|
|
__ieee80211_sta_join_ibss(sdata, cbss->bssid,
|
|
beacon_int,
|
|
&chandef,
|
|
basic_rates,
|
|
cbss->capability,
|
|
tsf, false);
|
|
}
|
|
|
|
int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_csa_settings *csa_settings)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct beacon_data *presp, *old_presp;
|
|
struct cfg80211_bss *cbss;
|
|
const struct cfg80211_bss_ies *ies;
|
|
u16 capability = 0;
|
|
u64 tsf;
|
|
int ret = 0;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
if (ifibss->privacy)
|
|
capability = WLAN_CAPABILITY_PRIVACY;
|
|
|
|
cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan,
|
|
ifibss->bssid, ifibss->ssid,
|
|
ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS,
|
|
IEEE80211_PRIVACY(ifibss->privacy));
|
|
|
|
if (WARN_ON(!cbss)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
ies = rcu_dereference(cbss->ies);
|
|
tsf = ies->tsf;
|
|
rcu_read_unlock();
|
|
cfg80211_put_bss(sdata->local->hw.wiphy, cbss);
|
|
|
|
old_presp = rcu_dereference_protected(ifibss->presp,
|
|
lockdep_is_held(&sdata->wdev.mtx));
|
|
|
|
presp = ieee80211_ibss_build_presp(sdata,
|
|
sdata->vif.bss_conf.beacon_int,
|
|
sdata->vif.bss_conf.basic_rates,
|
|
capability, tsf, &ifibss->chandef,
|
|
NULL, csa_settings);
|
|
if (!presp) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
rcu_assign_pointer(ifibss->presp, presp);
|
|
if (old_presp)
|
|
kfree_rcu(old_presp, rcu_head);
|
|
|
|
return BSS_CHANGED_BEACON;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct cfg80211_bss *cbss;
|
|
int err, changed = 0;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
/* update cfg80211 bss information with the new channel */
|
|
if (!is_zero_ether_addr(ifibss->bssid)) {
|
|
cbss = cfg80211_get_bss(sdata->local->hw.wiphy,
|
|
ifibss->chandef.chan,
|
|
ifibss->bssid, ifibss->ssid,
|
|
ifibss->ssid_len,
|
|
IEEE80211_BSS_TYPE_IBSS,
|
|
IEEE80211_PRIVACY(ifibss->privacy));
|
|
/* XXX: should not really modify cfg80211 data */
|
|
if (cbss) {
|
|
cbss->channel = sdata->csa_chandef.chan;
|
|
cfg80211_put_bss(sdata->local->hw.wiphy, cbss);
|
|
}
|
|
}
|
|
|
|
ifibss->chandef = sdata->csa_chandef;
|
|
|
|
/* generate the beacon */
|
|
err = ieee80211_ibss_csa_beacon(sdata, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
changed |= err;
|
|
|
|
return changed;
|
|
}
|
|
|
|
void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
|
|
cancel_work_sync(&ifibss->csa_connection_drop_work);
|
|
}
|
|
|
|
static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta)
|
|
__acquires(RCU)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
u8 addr[ETH_ALEN];
|
|
|
|
memcpy(addr, sta->sta.addr, ETH_ALEN);
|
|
|
|
ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr);
|
|
|
|
sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
|
|
sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
|
|
/* authorize the station only if the network is not RSN protected. If
|
|
* not wait for the userspace to authorize it */
|
|
if (!sta->sdata->u.ibss.control_port)
|
|
sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
|
|
|
|
rate_control_rate_init(sta);
|
|
|
|
/* If it fails, maybe we raced another insertion? */
|
|
if (sta_info_insert_rcu(sta))
|
|
return sta_info_get(sdata, addr);
|
|
return sta;
|
|
}
|
|
|
|
static struct sta_info *
|
|
ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid,
|
|
const u8 *addr, u32 supp_rates)
|
|
__acquires(RCU)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_supported_band *sband;
|
|
enum nl80211_bss_scan_width scan_width;
|
|
int band;
|
|
|
|
/*
|
|
* XXX: Consider removing the least recently used entry and
|
|
* allow new one to be added.
|
|
*/
|
|
if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
|
|
net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
|
|
sdata->name, addr);
|
|
rcu_read_lock();
|
|
return NULL;
|
|
}
|
|
|
|
if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) {
|
|
rcu_read_lock();
|
|
return NULL;
|
|
}
|
|
|
|
if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) {
|
|
rcu_read_lock();
|
|
return NULL;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (WARN_ON_ONCE(!chanctx_conf))
|
|
return NULL;
|
|
band = chanctx_conf->def.chan->band;
|
|
scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def);
|
|
rcu_read_unlock();
|
|
|
|
sta = sta_info_alloc(sdata, addr, GFP_KERNEL);
|
|
if (!sta) {
|
|
rcu_read_lock();
|
|
return NULL;
|
|
}
|
|
|
|
sta->last_rx = jiffies;
|
|
|
|
/* make sure mandatory rates are always added */
|
|
sband = local->hw.wiphy->bands[band];
|
|
sta->sta.supp_rates[band] = supp_rates |
|
|
ieee80211_mandatory_rates(sband, scan_width);
|
|
|
|
return ieee80211_ibss_finish_sta(sta);
|
|
}
|
|
|
|
static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
int active = 0;
|
|
struct sta_info *sta;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(sta, &local->sta_list, list) {
|
|
if (sta->sdata == sdata &&
|
|
time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
|
|
jiffies)) {
|
|
active++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
return active;
|
|
}
|
|
|
|
static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct cfg80211_bss *cbss;
|
|
struct beacon_data *presp;
|
|
struct sta_info *sta;
|
|
|
|
if (!is_zero_ether_addr(ifibss->bssid)) {
|
|
cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan,
|
|
ifibss->bssid, ifibss->ssid,
|
|
ifibss->ssid_len,
|
|
IEEE80211_BSS_TYPE_IBSS,
|
|
IEEE80211_PRIVACY(ifibss->privacy));
|
|
|
|
if (cbss) {
|
|
cfg80211_unlink_bss(local->hw.wiphy, cbss);
|
|
cfg80211_put_bss(sdata->local->hw.wiphy, cbss);
|
|
}
|
|
}
|
|
|
|
ifibss->state = IEEE80211_IBSS_MLME_SEARCH;
|
|
|
|
sta_info_flush(sdata);
|
|
|
|
spin_lock_bh(&ifibss->incomplete_lock);
|
|
while (!list_empty(&ifibss->incomplete_stations)) {
|
|
sta = list_first_entry(&ifibss->incomplete_stations,
|
|
struct sta_info, list);
|
|
list_del(&sta->list);
|
|
spin_unlock_bh(&ifibss->incomplete_lock);
|
|
|
|
sta_info_free(local, sta);
|
|
spin_lock_bh(&ifibss->incomplete_lock);
|
|
}
|
|
spin_unlock_bh(&ifibss->incomplete_lock);
|
|
|
|
netif_carrier_off(sdata->dev);
|
|
|
|
sdata->vif.bss_conf.ibss_joined = false;
|
|
sdata->vif.bss_conf.ibss_creator = false;
|
|
sdata->vif.bss_conf.enable_beacon = false;
|
|
sdata->vif.bss_conf.ssid_len = 0;
|
|
|
|
/* remove beacon */
|
|
presp = rcu_dereference_protected(ifibss->presp,
|
|
lockdep_is_held(&sdata->wdev.mtx));
|
|
RCU_INIT_POINTER(sdata->u.ibss.presp, NULL);
|
|
if (presp)
|
|
kfree_rcu(presp, rcu_head);
|
|
|
|
clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
|
|
BSS_CHANGED_IBSS);
|
|
drv_leave_ibss(local, sdata);
|
|
mutex_lock(&local->mtx);
|
|
ieee80211_vif_release_channel(sdata);
|
|
mutex_unlock(&local->mtx);
|
|
}
|
|
|
|
static void ieee80211_csa_connection_drop_work(struct work_struct *work)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
container_of(work, struct ieee80211_sub_if_data,
|
|
u.ibss.csa_connection_drop_work);
|
|
|
|
sdata_lock(sdata);
|
|
|
|
ieee80211_ibss_disconnect(sdata);
|
|
synchronize_rcu();
|
|
skb_queue_purge(&sdata->skb_queue);
|
|
|
|
/* trigger a scan to find another IBSS network to join */
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
|
|
sdata_unlock(sdata);
|
|
}
|
|
|
|
static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
int err;
|
|
|
|
/* if the current channel is a DFS channel, mark the channel as
|
|
* unavailable.
|
|
*/
|
|
err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
|
|
&ifibss->chandef,
|
|
NL80211_IFTYPE_ADHOC);
|
|
if (err > 0)
|
|
cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef,
|
|
GFP_ATOMIC);
|
|
}
|
|
|
|
static bool
|
|
ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee802_11_elems *elems,
|
|
bool beacon)
|
|
{
|
|
struct cfg80211_csa_settings params;
|
|
struct ieee80211_csa_ie csa_ie;
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
enum nl80211_channel_type ch_type;
|
|
int err;
|
|
u32 sta_flags;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
sta_flags = IEEE80211_STA_DISABLE_VHT;
|
|
switch (ifibss->chandef.width) {
|
|
case NL80211_CHAN_WIDTH_5:
|
|
case NL80211_CHAN_WIDTH_10:
|
|
case NL80211_CHAN_WIDTH_20_NOHT:
|
|
sta_flags |= IEEE80211_STA_DISABLE_HT;
|
|
/* fall through */
|
|
case NL80211_CHAN_WIDTH_20:
|
|
sta_flags |= IEEE80211_STA_DISABLE_40MHZ;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
memset(&csa_ie, 0, sizeof(csa_ie));
|
|
err = ieee80211_parse_ch_switch_ie(sdata, elems,
|
|
ifibss->chandef.chan->band,
|
|
sta_flags, ifibss->bssid, &csa_ie);
|
|
/* can't switch to destination channel, fail */
|
|
if (err < 0)
|
|
goto disconnect;
|
|
|
|
/* did not contain a CSA */
|
|
if (err)
|
|
return false;
|
|
|
|
/* channel switch is not supported, disconnect */
|
|
if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
|
|
goto disconnect;
|
|
|
|
params.count = csa_ie.count;
|
|
params.chandef = csa_ie.chandef;
|
|
|
|
switch (ifibss->chandef.width) {
|
|
case NL80211_CHAN_WIDTH_20_NOHT:
|
|
case NL80211_CHAN_WIDTH_20:
|
|
case NL80211_CHAN_WIDTH_40:
|
|
/* keep our current HT mode (HT20/HT40+/HT40-), even if
|
|
* another mode has been announced. The mode is not adopted
|
|
* within the beacon while doing CSA and we should therefore
|
|
* keep the mode which we announce.
|
|
*/
|
|
ch_type = cfg80211_get_chandef_type(&ifibss->chandef);
|
|
cfg80211_chandef_create(¶ms.chandef, params.chandef.chan,
|
|
ch_type);
|
|
break;
|
|
case NL80211_CHAN_WIDTH_5:
|
|
case NL80211_CHAN_WIDTH_10:
|
|
if (params.chandef.width != ifibss->chandef.width) {
|
|
sdata_info(sdata,
|
|
"IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
|
|
ifibss->bssid,
|
|
params.chandef.chan->center_freq,
|
|
params.chandef.width,
|
|
params.chandef.center_freq1,
|
|
params.chandef.center_freq2);
|
|
goto disconnect;
|
|
}
|
|
break;
|
|
default:
|
|
/* should not happen, sta_flags should prevent VHT modes. */
|
|
WARN_ON(1);
|
|
goto disconnect;
|
|
}
|
|
|
|
if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef,
|
|
NL80211_IFTYPE_ADHOC)) {
|
|
sdata_info(sdata,
|
|
"IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
|
|
ifibss->bssid,
|
|
params.chandef.chan->center_freq,
|
|
params.chandef.width,
|
|
params.chandef.center_freq1,
|
|
params.chandef.center_freq2);
|
|
goto disconnect;
|
|
}
|
|
|
|
err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy,
|
|
¶ms.chandef,
|
|
NL80211_IFTYPE_ADHOC);
|
|
if (err < 0)
|
|
goto disconnect;
|
|
if (err > 0 && !ifibss->userspace_handles_dfs) {
|
|
/* IBSS-DFS only allowed with a control program */
|
|
goto disconnect;
|
|
}
|
|
|
|
params.radar_required = err;
|
|
|
|
if (cfg80211_chandef_identical(¶ms.chandef,
|
|
&sdata->vif.bss_conf.chandef)) {
|
|
ibss_dbg(sdata,
|
|
"received csa with an identical chandef, ignoring\n");
|
|
return true;
|
|
}
|
|
|
|
/* all checks done, now perform the channel switch. */
|
|
ibss_dbg(sdata,
|
|
"received channel switch announcement to go to channel %d MHz\n",
|
|
params.chandef.chan->center_freq);
|
|
|
|
params.block_tx = !!csa_ie.mode;
|
|
|
|
if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev,
|
|
¶ms))
|
|
goto disconnect;
|
|
|
|
ieee80211_ibss_csa_mark_radar(sdata);
|
|
|
|
return true;
|
|
disconnect:
|
|
ibss_dbg(sdata, "Can't handle channel switch, disconnect\n");
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&ifibss->csa_connection_drop_work);
|
|
|
|
ieee80211_ibss_csa_mark_radar(sdata);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
struct ieee80211_rx_status *rx_status,
|
|
struct ieee802_11_elems *elems)
|
|
{
|
|
int required_len;
|
|
|
|
if (len < IEEE80211_MIN_ACTION_SIZE + 1)
|
|
return;
|
|
|
|
/* CSA is the only action we handle for now */
|
|
if (mgmt->u.action.u.measurement.action_code !=
|
|
WLAN_ACTION_SPCT_CHL_SWITCH)
|
|
return;
|
|
|
|
required_len = IEEE80211_MIN_ACTION_SIZE +
|
|
sizeof(mgmt->u.action.u.chan_switch);
|
|
if (len < required_len)
|
|
return;
|
|
|
|
if (!sdata->vif.csa_active)
|
|
ieee80211_ibss_process_chanswitch(sdata, elems, false);
|
|
}
|
|
|
|
static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len)
|
|
{
|
|
u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code);
|
|
|
|
if (len < IEEE80211_DEAUTH_FRAME_LEN)
|
|
return;
|
|
|
|
ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n",
|
|
mgmt->sa, mgmt->da, mgmt->bssid, reason);
|
|
sta_info_destroy_addr(sdata, mgmt->sa);
|
|
}
|
|
|
|
static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt,
|
|
size_t len)
|
|
{
|
|
u16 auth_alg, auth_transaction;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
if (len < 24 + 6)
|
|
return;
|
|
|
|
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
|
|
auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
|
|
|
|
ibss_dbg(sdata,
|
|
"RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n",
|
|
mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction);
|
|
|
|
if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
|
|
return;
|
|
|
|
/*
|
|
* IEEE 802.11 standard does not require authentication in IBSS
|
|
* networks and most implementations do not seem to use it.
|
|
* However, try to reply to authentication attempts if someone
|
|
* has actually implemented this.
|
|
*/
|
|
ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0,
|
|
mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0);
|
|
}
|
|
|
|
static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
struct ieee80211_rx_status *rx_status,
|
|
struct ieee802_11_elems *elems,
|
|
struct ieee80211_channel *channel)
|
|
{
|
|
struct sta_info *sta;
|
|
enum ieee80211_band band = rx_status->band;
|
|
enum nl80211_bss_scan_width scan_width;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
|
|
bool rates_updated = false;
|
|
u32 supp_rates = 0;
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
|
|
return;
|
|
|
|
if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid))
|
|
return;
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, mgmt->sa);
|
|
|
|
if (elems->supp_rates) {
|
|
supp_rates = ieee80211_sta_get_rates(sdata, elems,
|
|
band, NULL);
|
|
if (sta) {
|
|
u32 prev_rates;
|
|
|
|
prev_rates = sta->sta.supp_rates[band];
|
|
/* make sure mandatory rates are always added */
|
|
scan_width = NL80211_BSS_CHAN_WIDTH_20;
|
|
if (rx_status->flag & RX_FLAG_5MHZ)
|
|
scan_width = NL80211_BSS_CHAN_WIDTH_5;
|
|
if (rx_status->flag & RX_FLAG_10MHZ)
|
|
scan_width = NL80211_BSS_CHAN_WIDTH_10;
|
|
|
|
sta->sta.supp_rates[band] = supp_rates |
|
|
ieee80211_mandatory_rates(sband, scan_width);
|
|
if (sta->sta.supp_rates[band] != prev_rates) {
|
|
ibss_dbg(sdata,
|
|
"updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n",
|
|
sta->sta.addr, prev_rates,
|
|
sta->sta.supp_rates[band]);
|
|
rates_updated = true;
|
|
}
|
|
} else {
|
|
rcu_read_unlock();
|
|
sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid,
|
|
mgmt->sa, supp_rates);
|
|
}
|
|
}
|
|
|
|
if (sta && !sta->sta.wme &&
|
|
elems->wmm_info && local->hw.queues >= IEEE80211_NUM_ACS) {
|
|
sta->sta.wme = true;
|
|
ieee80211_check_fast_xmit(sta);
|
|
}
|
|
|
|
if (sta && elems->ht_operation && elems->ht_cap_elem &&
|
|
sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
|
|
sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 &&
|
|
sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) {
|
|
/* we both use HT */
|
|
struct ieee80211_ht_cap htcap_ie;
|
|
struct cfg80211_chan_def chandef;
|
|
enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth;
|
|
|
|
ieee80211_ht_oper_to_chandef(channel,
|
|
elems->ht_operation,
|
|
&chandef);
|
|
|
|
memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie));
|
|
rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
|
|
&htcap_ie,
|
|
sta);
|
|
|
|
if (elems->vht_operation && elems->vht_cap_elem &&
|
|
sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 &&
|
|
sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) {
|
|
/* we both use VHT */
|
|
struct ieee80211_vht_cap cap_ie;
|
|
struct ieee80211_sta_vht_cap cap = sta->sta.vht_cap;
|
|
|
|
ieee80211_vht_oper_to_chandef(channel,
|
|
elems->vht_operation,
|
|
&chandef);
|
|
memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie));
|
|
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
|
|
&cap_ie, sta);
|
|
if (memcmp(&cap, &sta->sta.vht_cap, sizeof(cap)))
|
|
rates_updated |= true;
|
|
}
|
|
|
|
if (bw != sta->sta.bandwidth)
|
|
rates_updated |= true;
|
|
|
|
if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef,
|
|
&chandef))
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
if (sta && rates_updated) {
|
|
u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED;
|
|
u8 rx_nss = sta->sta.rx_nss;
|
|
|
|
/* Force rx_nss recalculation */
|
|
sta->sta.rx_nss = 0;
|
|
rate_control_rate_init(sta);
|
|
if (sta->sta.rx_nss != rx_nss)
|
|
changed |= IEEE80211_RC_NSS_CHANGED;
|
|
|
|
drv_sta_rc_update(local, sdata, &sta->sta, changed);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
struct ieee80211_rx_status *rx_status,
|
|
struct ieee802_11_elems *elems)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct cfg80211_bss *cbss;
|
|
struct ieee80211_bss *bss;
|
|
struct ieee80211_channel *channel;
|
|
u64 beacon_timestamp, rx_timestamp;
|
|
u32 supp_rates = 0;
|
|
enum ieee80211_band band = rx_status->band;
|
|
|
|
channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
|
|
if (!channel)
|
|
return;
|
|
|
|
ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel);
|
|
|
|
bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
|
|
channel);
|
|
if (!bss)
|
|
return;
|
|
|
|
cbss = container_of((void *)bss, struct cfg80211_bss, priv);
|
|
|
|
/* same for beacon and probe response */
|
|
beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
|
|
|
|
/* check if we need to merge IBSS */
|
|
|
|
/* not an IBSS */
|
|
if (!(cbss->capability & WLAN_CAPABILITY_IBSS))
|
|
goto put_bss;
|
|
|
|
/* different channel */
|
|
if (sdata->u.ibss.fixed_channel &&
|
|
sdata->u.ibss.chandef.chan != cbss->channel)
|
|
goto put_bss;
|
|
|
|
/* different SSID */
|
|
if (elems->ssid_len != sdata->u.ibss.ssid_len ||
|
|
memcmp(elems->ssid, sdata->u.ibss.ssid,
|
|
sdata->u.ibss.ssid_len))
|
|
goto put_bss;
|
|
|
|
/* process channel switch */
|
|
if (sdata->vif.csa_active ||
|
|
ieee80211_ibss_process_chanswitch(sdata, elems, true))
|
|
goto put_bss;
|
|
|
|
/* same BSSID */
|
|
if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid))
|
|
goto put_bss;
|
|
|
|
/* we use a fixed BSSID */
|
|
if (sdata->u.ibss.fixed_bssid)
|
|
goto put_bss;
|
|
|
|
if (ieee80211_have_rx_timestamp(rx_status)) {
|
|
/* time when timestamp field was received */
|
|
rx_timestamp =
|
|
ieee80211_calculate_rx_timestamp(local, rx_status,
|
|
len + FCS_LEN, 24);
|
|
} else {
|
|
/*
|
|
* second best option: get current TSF
|
|
* (will return -1 if not supported)
|
|
*/
|
|
rx_timestamp = drv_get_tsf(local, sdata);
|
|
}
|
|
|
|
ibss_dbg(sdata,
|
|
"RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
|
|
mgmt->sa, mgmt->bssid,
|
|
(unsigned long long)rx_timestamp,
|
|
(unsigned long long)beacon_timestamp,
|
|
(unsigned long long)(rx_timestamp - beacon_timestamp),
|
|
jiffies);
|
|
|
|
if (beacon_timestamp > rx_timestamp) {
|
|
ibss_dbg(sdata,
|
|
"beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n",
|
|
mgmt->bssid);
|
|
ieee80211_sta_join_ibss(sdata, bss);
|
|
supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL);
|
|
ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa,
|
|
supp_rates);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
put_bss:
|
|
ieee80211_rx_bss_put(local, bss);
|
|
}
|
|
|
|
void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *bssid, const u8 *addr,
|
|
u32 supp_rates)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
struct ieee80211_supported_band *sband;
|
|
enum nl80211_bss_scan_width scan_width;
|
|
int band;
|
|
|
|
/*
|
|
* XXX: Consider removing the least recently used entry and
|
|
* allow new one to be added.
|
|
*/
|
|
if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
|
|
net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n",
|
|
sdata->name, addr);
|
|
return;
|
|
}
|
|
|
|
if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH)
|
|
return;
|
|
|
|
if (!ether_addr_equal(bssid, sdata->u.ibss.bssid))
|
|
return;
|
|
|
|
rcu_read_lock();
|
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (WARN_ON_ONCE(!chanctx_conf)) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
band = chanctx_conf->def.chan->band;
|
|
scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def);
|
|
rcu_read_unlock();
|
|
|
|
sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
|
|
if (!sta)
|
|
return;
|
|
|
|
sta->last_rx = jiffies;
|
|
|
|
/* make sure mandatory rates are always added */
|
|
sband = local->hw.wiphy->bands[band];
|
|
sta->sta.supp_rates[band] = supp_rates |
|
|
ieee80211_mandatory_rates(sband, scan_width);
|
|
|
|
spin_lock(&ifibss->incomplete_lock);
|
|
list_add(&sta->list, &ifibss->incomplete_stations);
|
|
spin_unlock(&ifibss->incomplete_lock);
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
|
|
static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta, *tmp;
|
|
unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT;
|
|
unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT;
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
|
|
list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
|
|
if (sdata != sta->sdata)
|
|
continue;
|
|
|
|
if (time_after(jiffies, sta->last_rx + exp_time) ||
|
|
(time_after(jiffies, sta->last_rx + exp_rsn_time) &&
|
|
sta->sta_state != IEEE80211_STA_AUTHORIZED)) {
|
|
sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n",
|
|
sta->sta_state != IEEE80211_STA_AUTHORIZED ?
|
|
"not authorized " : "", sta->sta.addr);
|
|
|
|
WARN_ON(__sta_info_destroy(sta));
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&local->sta_mtx);
|
|
}
|
|
|
|
/*
|
|
* This function is called with state == IEEE80211_IBSS_MLME_JOINED
|
|
*/
|
|
|
|
static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
enum nl80211_bss_scan_width scan_width;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
mod_timer(&ifibss->timer,
|
|
round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL));
|
|
|
|
ieee80211_ibss_sta_expire(sdata);
|
|
|
|
if (time_before(jiffies, ifibss->last_scan_completed +
|
|
IEEE80211_IBSS_MERGE_INTERVAL))
|
|
return;
|
|
|
|
if (ieee80211_sta_active_ibss(sdata))
|
|
return;
|
|
|
|
if (ifibss->fixed_channel)
|
|
return;
|
|
|
|
sdata_info(sdata,
|
|
"No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n");
|
|
|
|
scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef);
|
|
ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len,
|
|
NULL, 0, scan_width);
|
|
}
|
|
|
|
static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
u8 bssid[ETH_ALEN];
|
|
u16 capability;
|
|
int i;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
if (ifibss->fixed_bssid) {
|
|
memcpy(bssid, ifibss->bssid, ETH_ALEN);
|
|
} else {
|
|
/* Generate random, not broadcast, locally administered BSSID. Mix in
|
|
* own MAC address to make sure that devices that do not have proper
|
|
* random number generator get different BSSID. */
|
|
get_random_bytes(bssid, ETH_ALEN);
|
|
for (i = 0; i < ETH_ALEN; i++)
|
|
bssid[i] ^= sdata->vif.addr[i];
|
|
bssid[0] &= ~0x01;
|
|
bssid[0] |= 0x02;
|
|
}
|
|
|
|
sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid);
|
|
|
|
capability = WLAN_CAPABILITY_IBSS;
|
|
|
|
if (ifibss->privacy)
|
|
capability |= WLAN_CAPABILITY_PRIVACY;
|
|
|
|
__ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
|
|
&ifibss->chandef, ifibss->basic_rates,
|
|
capability, 0, true);
|
|
}
|
|
|
|
static unsigned ibss_setup_channels(struct wiphy *wiphy,
|
|
struct ieee80211_channel **channels,
|
|
unsigned int channels_max,
|
|
u32 center_freq, u32 width)
|
|
{
|
|
struct ieee80211_channel *chan = NULL;
|
|
unsigned int n_chan = 0;
|
|
u32 start_freq, end_freq, freq;
|
|
|
|
if (width <= 20) {
|
|
start_freq = center_freq;
|
|
end_freq = center_freq;
|
|
} else {
|
|
start_freq = center_freq - width / 2 + 10;
|
|
end_freq = center_freq + width / 2 - 10;
|
|
}
|
|
|
|
for (freq = start_freq; freq <= end_freq; freq += 20) {
|
|
chan = ieee80211_get_channel(wiphy, freq);
|
|
if (!chan)
|
|
continue;
|
|
if (n_chan >= channels_max)
|
|
return n_chan;
|
|
|
|
channels[n_chan] = chan;
|
|
n_chan++;
|
|
}
|
|
|
|
return n_chan;
|
|
}
|
|
|
|
static unsigned int
|
|
ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy,
|
|
const struct cfg80211_chan_def *chandef,
|
|
struct ieee80211_channel **channels,
|
|
unsigned int channels_max)
|
|
{
|
|
unsigned int n_chan = 0;
|
|
u32 width, cf1, cf2 = 0;
|
|
|
|
switch (chandef->width) {
|
|
case NL80211_CHAN_WIDTH_40:
|
|
width = 40;
|
|
break;
|
|
case NL80211_CHAN_WIDTH_80P80:
|
|
cf2 = chandef->center_freq2;
|
|
/* fall through */
|
|
case NL80211_CHAN_WIDTH_80:
|
|
width = 80;
|
|
break;
|
|
case NL80211_CHAN_WIDTH_160:
|
|
width = 160;
|
|
break;
|
|
default:
|
|
width = 20;
|
|
break;
|
|
}
|
|
|
|
cf1 = chandef->center_freq1;
|
|
|
|
n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width);
|
|
|
|
if (cf2)
|
|
n_chan += ibss_setup_channels(wiphy, &channels[n_chan],
|
|
channels_max - n_chan, cf2,
|
|
width);
|
|
|
|
return n_chan;
|
|
}
|
|
|
|
/*
|
|
* This function is called with state == IEEE80211_IBSS_MLME_SEARCH
|
|
*/
|
|
|
|
static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct cfg80211_bss *cbss;
|
|
struct ieee80211_channel *chan = NULL;
|
|
const u8 *bssid = NULL;
|
|
enum nl80211_bss_scan_width scan_width;
|
|
int active_ibss;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
active_ibss = ieee80211_sta_active_ibss(sdata);
|
|
ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss);
|
|
|
|
if (active_ibss)
|
|
return;
|
|
|
|
if (ifibss->fixed_bssid)
|
|
bssid = ifibss->bssid;
|
|
if (ifibss->fixed_channel)
|
|
chan = ifibss->chandef.chan;
|
|
if (!is_zero_ether_addr(ifibss->bssid))
|
|
bssid = ifibss->bssid;
|
|
cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid,
|
|
ifibss->ssid, ifibss->ssid_len,
|
|
IEEE80211_BSS_TYPE_IBSS,
|
|
IEEE80211_PRIVACY(ifibss->privacy));
|
|
|
|
if (cbss) {
|
|
struct ieee80211_bss *bss;
|
|
|
|
bss = (void *)cbss->priv;
|
|
ibss_dbg(sdata,
|
|
"sta_find_ibss: selected %pM current %pM\n",
|
|
cbss->bssid, ifibss->bssid);
|
|
sdata_info(sdata,
|
|
"Selected IBSS BSSID %pM based on configured SSID\n",
|
|
cbss->bssid);
|
|
|
|
ieee80211_sta_join_ibss(sdata, bss);
|
|
ieee80211_rx_bss_put(local, bss);
|
|
return;
|
|
}
|
|
|
|
/* if a fixed bssid and a fixed freq have been provided create the IBSS
|
|
* directly and do not waste time scanning
|
|
*/
|
|
if (ifibss->fixed_bssid && ifibss->fixed_channel) {
|
|
sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n",
|
|
bssid);
|
|
ieee80211_sta_create_ibss(sdata);
|
|
return;
|
|
}
|
|
|
|
|
|
ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n");
|
|
|
|
/* Selected IBSS not found in current scan results - try to scan */
|
|
if (time_after(jiffies, ifibss->last_scan_completed +
|
|
IEEE80211_SCAN_INTERVAL)) {
|
|
struct ieee80211_channel *channels[8];
|
|
unsigned int num;
|
|
|
|
sdata_info(sdata, "Trigger new scan to find an IBSS to join\n");
|
|
|
|
num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy,
|
|
&ifibss->chandef,
|
|
channels,
|
|
ARRAY_SIZE(channels));
|
|
scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef);
|
|
ieee80211_request_ibss_scan(sdata, ifibss->ssid,
|
|
ifibss->ssid_len, channels, num,
|
|
scan_width);
|
|
} else {
|
|
int interval = IEEE80211_SCAN_INTERVAL;
|
|
|
|
if (time_after(jiffies, ifibss->ibss_join_req +
|
|
IEEE80211_IBSS_JOIN_TIMEOUT))
|
|
ieee80211_sta_create_ibss(sdata);
|
|
|
|
mod_timer(&ifibss->timer,
|
|
round_jiffies(jiffies + interval));
|
|
}
|
|
}
|
|
|
|
static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *req)
|
|
{
|
|
struct ieee80211_mgmt *mgmt = (void *)req->data;
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct ieee80211_local *local = sdata->local;
|
|
int tx_last_beacon, len = req->len;
|
|
struct sk_buff *skb;
|
|
struct beacon_data *presp;
|
|
u8 *pos, *end;
|
|
|
|
sdata_assert_lock(sdata);
|
|
|
|
presp = rcu_dereference_protected(ifibss->presp,
|
|
lockdep_is_held(&sdata->wdev.mtx));
|
|
|
|
if (ifibss->state != IEEE80211_IBSS_MLME_JOINED ||
|
|
len < 24 + 2 || !presp)
|
|
return;
|
|
|
|
tx_last_beacon = drv_tx_last_beacon(local);
|
|
|
|
ibss_dbg(sdata,
|
|
"RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n",
|
|
mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon);
|
|
|
|
if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da))
|
|
return;
|
|
|
|
if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) &&
|
|
!is_broadcast_ether_addr(mgmt->bssid))
|
|
return;
|
|
|
|
end = ((u8 *) mgmt) + len;
|
|
pos = mgmt->u.probe_req.variable;
|
|
if (pos[0] != WLAN_EID_SSID ||
|
|
pos + 2 + pos[1] > end) {
|
|
ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n",
|
|
mgmt->sa);
|
|
return;
|
|
}
|
|
if (pos[1] != 0 &&
|
|
(pos[1] != ifibss->ssid_len ||
|
|
memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) {
|
|
/* Ignore ProbeReq for foreign SSID */
|
|
return;
|
|
}
|
|
|
|
/* Reply with ProbeResp */
|
|
skb = dev_alloc_skb(local->tx_headroom + presp->head_len);
|
|
if (!skb)
|
|
return;
|
|
|
|
skb_reserve(skb, local->tx_headroom);
|
|
memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len);
|
|
|
|
memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN);
|
|
ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa);
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
|
|
|
|
/* avoid excessive retries for probe request to wildcard SSIDs */
|
|
if (pos[1] == 0)
|
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK;
|
|
|
|
ieee80211_tx_skb(sdata, skb);
|
|
}
|
|
|
|
static
|
|
void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata,
|
|
struct ieee80211_mgmt *mgmt, size_t len,
|
|
struct ieee80211_rx_status *rx_status)
|
|
{
|
|
size_t baselen;
|
|
struct ieee802_11_elems elems;
|
|
|
|
BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) !=
|
|
offsetof(typeof(mgmt->u.beacon), variable));
|
|
|
|
/*
|
|
* either beacon or probe_resp but the variable field is at the
|
|
* same offset
|
|
*/
|
|
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
|
|
if (baselen > len)
|
|
return;
|
|
|
|
ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
|
|
false, &elems);
|
|
|
|
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
|
|
}
|
|
|
|
void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_rx_status *rx_status;
|
|
struct ieee80211_mgmt *mgmt;
|
|
u16 fc;
|
|
struct ieee802_11_elems elems;
|
|
int ies_len;
|
|
|
|
rx_status = IEEE80211_SKB_RXCB(skb);
|
|
mgmt = (struct ieee80211_mgmt *) skb->data;
|
|
fc = le16_to_cpu(mgmt->frame_control);
|
|
|
|
sdata_lock(sdata);
|
|
|
|
if (!sdata->u.ibss.ssid_len)
|
|
goto mgmt_out; /* not ready to merge yet */
|
|
|
|
switch (fc & IEEE80211_FCTL_STYPE) {
|
|
case IEEE80211_STYPE_PROBE_REQ:
|
|
ieee80211_rx_mgmt_probe_req(sdata, skb);
|
|
break;
|
|
case IEEE80211_STYPE_PROBE_RESP:
|
|
case IEEE80211_STYPE_BEACON:
|
|
ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len,
|
|
rx_status);
|
|
break;
|
|
case IEEE80211_STYPE_AUTH:
|
|
ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_DEAUTH:
|
|
ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len);
|
|
break;
|
|
case IEEE80211_STYPE_ACTION:
|
|
switch (mgmt->u.action.category) {
|
|
case WLAN_CATEGORY_SPECTRUM_MGMT:
|
|
ies_len = skb->len -
|
|
offsetof(struct ieee80211_mgmt,
|
|
u.action.u.chan_switch.variable);
|
|
|
|
if (ies_len < 0)
|
|
break;
|
|
|
|
ieee802_11_parse_elems(
|
|
mgmt->u.action.u.chan_switch.variable,
|
|
ies_len, true, &elems);
|
|
|
|
if (elems.parse_error)
|
|
break;
|
|
|
|
ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len,
|
|
rx_status, &elems);
|
|
break;
|
|
}
|
|
}
|
|
|
|
mgmt_out:
|
|
sdata_unlock(sdata);
|
|
}
|
|
|
|
void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
struct sta_info *sta;
|
|
|
|
sdata_lock(sdata);
|
|
|
|
/*
|
|
* Work could be scheduled after scan or similar
|
|
* when we aren't even joined (or trying) with a
|
|
* network.
|
|
*/
|
|
if (!ifibss->ssid_len)
|
|
goto out;
|
|
|
|
spin_lock_bh(&ifibss->incomplete_lock);
|
|
while (!list_empty(&ifibss->incomplete_stations)) {
|
|
sta = list_first_entry(&ifibss->incomplete_stations,
|
|
struct sta_info, list);
|
|
list_del(&sta->list);
|
|
spin_unlock_bh(&ifibss->incomplete_lock);
|
|
|
|
ieee80211_ibss_finish_sta(sta);
|
|
rcu_read_unlock();
|
|
spin_lock_bh(&ifibss->incomplete_lock);
|
|
}
|
|
spin_unlock_bh(&ifibss->incomplete_lock);
|
|
|
|
switch (ifibss->state) {
|
|
case IEEE80211_IBSS_MLME_SEARCH:
|
|
ieee80211_sta_find_ibss(sdata);
|
|
break;
|
|
case IEEE80211_IBSS_MLME_JOINED:
|
|
ieee80211_sta_merge_ibss(sdata);
|
|
break;
|
|
default:
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
|
|
out:
|
|
sdata_unlock(sdata);
|
|
}
|
|
|
|
static void ieee80211_ibss_timer(unsigned long data)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata =
|
|
(struct ieee80211_sub_if_data *) data;
|
|
|
|
ieee80211_queue_work(&sdata->local->hw, &sdata->work);
|
|
}
|
|
|
|
void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
|
|
setup_timer(&ifibss->timer, ieee80211_ibss_timer,
|
|
(unsigned long) sdata);
|
|
INIT_LIST_HEAD(&ifibss->incomplete_stations);
|
|
spin_lock_init(&ifibss->incomplete_lock);
|
|
INIT_WORK(&ifibss->csa_connection_drop_work,
|
|
ieee80211_csa_connection_drop_work);
|
|
}
|
|
|
|
/* scan finished notification */
|
|
void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
mutex_lock(&local->iflist_mtx);
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
|
|
continue;
|
|
sdata->u.ibss.last_scan_completed = jiffies;
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
}
|
|
mutex_unlock(&local->iflist_mtx);
|
|
}
|
|
|
|
int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
|
|
struct cfg80211_ibss_params *params)
|
|
{
|
|
u32 changed = 0;
|
|
u32 rate_flags;
|
|
struct ieee80211_supported_band *sband;
|
|
enum ieee80211_chanctx_mode chanmode;
|
|
struct ieee80211_local *local = sdata->local;
|
|
int radar_detect_width = 0;
|
|
int i;
|
|
int ret;
|
|
|
|
ret = cfg80211_chandef_dfs_required(local->hw.wiphy,
|
|
¶ms->chandef,
|
|
sdata->wdev.iftype);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret > 0) {
|
|
if (!params->userspace_handles_dfs)
|
|
return -EINVAL;
|
|
radar_detect_width = BIT(params->chandef.width);
|
|
}
|
|
|
|
chanmode = (params->channel_fixed && !ret) ?
|
|
IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE;
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode,
|
|
radar_detect_width);
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (params->bssid) {
|
|
memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN);
|
|
sdata->u.ibss.fixed_bssid = true;
|
|
} else
|
|
sdata->u.ibss.fixed_bssid = false;
|
|
|
|
sdata->u.ibss.privacy = params->privacy;
|
|
sdata->u.ibss.control_port = params->control_port;
|
|
sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs;
|
|
sdata->u.ibss.basic_rates = params->basic_rates;
|
|
sdata->u.ibss.last_scan_completed = jiffies;
|
|
|
|
/* fix basic_rates if channel does not support these rates */
|
|
rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef);
|
|
sband = local->hw.wiphy->bands[params->chandef.chan->band];
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
|
|
sdata->u.ibss.basic_rates &= ~BIT(i);
|
|
}
|
|
memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate,
|
|
sizeof(params->mcast_rate));
|
|
|
|
sdata->vif.bss_conf.beacon_int = params->beacon_interval;
|
|
|
|
sdata->u.ibss.chandef = params->chandef;
|
|
sdata->u.ibss.fixed_channel = params->channel_fixed;
|
|
|
|
if (params->ie) {
|
|
sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len,
|
|
GFP_KERNEL);
|
|
if (sdata->u.ibss.ie)
|
|
sdata->u.ibss.ie_len = params->ie_len;
|
|
}
|
|
|
|
sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
|
|
sdata->u.ibss.ibss_join_req = jiffies;
|
|
|
|
memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len);
|
|
sdata->u.ibss.ssid_len = params->ssid_len;
|
|
|
|
memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa,
|
|
sizeof(sdata->u.ibss.ht_capa));
|
|
memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask,
|
|
sizeof(sdata->u.ibss.ht_capa_mask));
|
|
|
|
/*
|
|
* 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is
|
|
* reserved, but an HT STA shall protect HT transmissions as though
|
|
* the HT Protection field were set to non-HT mixed mode.
|
|
*
|
|
* In an IBSS, the RIFS Mode field of the HT Operation element is
|
|
* also reserved, but an HT STA shall operate as though this field
|
|
* were set to 1.
|
|
*/
|
|
|
|
sdata->vif.bss_conf.ht_operation_mode |=
|
|
IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED
|
|
| IEEE80211_HT_PARAM_RIFS_MODE;
|
|
|
|
changed |= BSS_CHANGED_HT;
|
|
ieee80211_bss_info_change_notify(sdata, changed);
|
|
|
|
sdata->smps_mode = IEEE80211_SMPS_OFF;
|
|
sdata->needed_rx_chains = local->rx_chains;
|
|
|
|
ieee80211_queue_work(&local->hw, &sdata->work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
|
|
{
|
|
struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
|
|
|
|
ieee80211_ibss_disconnect(sdata);
|
|
ifibss->ssid_len = 0;
|
|
eth_zero_addr(ifibss->bssid);
|
|
|
|
/* remove beacon */
|
|
kfree(sdata->u.ibss.ie);
|
|
|
|
/* on the next join, re-program HT parameters */
|
|
memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa));
|
|
memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask));
|
|
|
|
synchronize_rcu();
|
|
|
|
skb_queue_purge(&sdata->skb_queue);
|
|
|
|
del_timer_sync(&sdata->u.ibss.timer);
|
|
|
|
return 0;
|
|
}
|