Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 2 | /* |
| 3 | * IBSS mode implementation |
| 4 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
| 5 | * Copyright 2004, Instant802 Networks, Inc. |
| 6 | * Copyright 2005, Devicescape Software, Inc. |
| 7 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 8 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
| 9 | * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> |
Johannes Berg | d98ad83 | 2014-09-03 15:24:57 +0300 | [diff] [blame] | 10 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
Sara Sharon | d321cd0 | 2016-01-25 15:46:35 +0200 | [diff] [blame] | 11 | * Copyright(c) 2016 Intel Deutschland GmbH |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 12 | * Copyright(c) 2018-2021 Intel Corporation |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 13 | */ |
| 14 | |
| 15 | #include <linux/delay.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 16 | #include <linux/slab.h> |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 17 | #include <linux/if_ether.h> |
| 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/if_arp.h> |
| 20 | #include <linux/etherdevice.h> |
| 21 | #include <linux/rtnetlink.h> |
| 22 | #include <net/mac80211.h> |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 23 | |
| 24 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 25 | #include "driver-ops.h" |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 26 | #include "rate.h" |
| 27 | |
| 28 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 29 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
| 30 | |
| 31 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) |
| 32 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 33 | #define IEEE80211_IBSS_RSN_INACTIVITY_LIMIT (10 * HZ) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 34 | |
| 35 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 |
| 36 | |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 37 | static struct beacon_data * |
| 38 | ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, |
| 39 | const int beacon_int, const u32 basic_rates, |
| 40 | const u16 capability, u64 tsf, |
| 41 | struct cfg80211_chan_def *chandef, |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 42 | bool *have_higher_than_11mbit, |
| 43 | struct cfg80211_csa_settings *csa_settings) |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 44 | { |
| 45 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 46 | struct ieee80211_local *local = sdata->local; |
| 47 | int rates_n = 0, i, ri; |
| 48 | struct ieee80211_mgmt *mgmt; |
| 49 | u8 *pos; |
| 50 | struct ieee80211_supported_band *sband; |
| 51 | u32 rate_flags, rates = 0, rates_added = 0; |
| 52 | struct beacon_data *presp; |
| 53 | int frame_len; |
| 54 | int shift; |
| 55 | |
| 56 | /* Build IBSS probe response */ |
| 57 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
| 58 | 12 /* struct ieee80211_mgmt.u.beacon */ + |
| 59 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + |
| 60 | 2 + 8 /* max Supported Rates */ + |
| 61 | 3 /* max DS params */ + |
| 62 | 4 /* IBSS params */ + |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 63 | 5 /* Channel Switch Announcement */ + |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 64 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
| 65 | 2 + sizeof(struct ieee80211_ht_cap) + |
| 66 | 2 + sizeof(struct ieee80211_ht_operation) + |
Johannes Berg | f1f3e9e | 2017-04-27 13:19:04 +0200 | [diff] [blame] | 67 | 2 + sizeof(struct ieee80211_vht_cap) + |
| 68 | 2 + sizeof(struct ieee80211_vht_operation) + |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 69 | ifibss->ie_len; |
| 70 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); |
| 71 | if (!presp) |
| 72 | return NULL; |
| 73 | |
| 74 | presp->head = (void *)(presp + 1); |
| 75 | |
| 76 | mgmt = (void *) presp->head; |
| 77 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 78 | IEEE80211_STYPE_PROBE_RESP); |
| 79 | eth_broadcast_addr(mgmt->da); |
| 80 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 81 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
| 82 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
| 83 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
| 84 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
| 85 | |
| 86 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
| 87 | |
| 88 | *pos++ = WLAN_EID_SSID; |
| 89 | *pos++ = ifibss->ssid_len; |
| 90 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); |
| 91 | pos += ifibss->ssid_len; |
| 92 | |
| 93 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
| 94 | rate_flags = ieee80211_chandef_rate_flags(chandef); |
| 95 | shift = ieee80211_chandef_get_shift(chandef); |
| 96 | rates_n = 0; |
| 97 | if (have_higher_than_11mbit) |
| 98 | *have_higher_than_11mbit = false; |
| 99 | |
| 100 | for (i = 0; i < sband->n_bitrates; i++) { |
| 101 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 102 | continue; |
| 103 | if (sband->bitrates[i].bitrate > 110 && |
| 104 | have_higher_than_11mbit) |
| 105 | *have_higher_than_11mbit = true; |
| 106 | |
| 107 | rates |= BIT(i); |
| 108 | rates_n++; |
| 109 | } |
| 110 | |
| 111 | *pos++ = WLAN_EID_SUPP_RATES; |
| 112 | *pos++ = min_t(int, 8, rates_n); |
| 113 | for (ri = 0; ri < sband->n_bitrates; ri++) { |
| 114 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 115 | 5 * (1 << shift)); |
| 116 | u8 basic = 0; |
| 117 | if (!(rates & BIT(ri))) |
| 118 | continue; |
| 119 | |
| 120 | if (basic_rates & BIT(ri)) |
| 121 | basic = 0x80; |
| 122 | *pos++ = basic | (u8) rate; |
| 123 | if (++rates_added == 8) { |
| 124 | ri++; /* continue at next rate for EXT_SUPP_RATES */ |
| 125 | break; |
| 126 | } |
| 127 | } |
| 128 | |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 129 | if (sband->band == NL80211_BAND_2GHZ) { |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 130 | *pos++ = WLAN_EID_DS_PARAMS; |
| 131 | *pos++ = 1; |
| 132 | *pos++ = ieee80211_frequency_to_channel( |
| 133 | chandef->chan->center_freq); |
| 134 | } |
| 135 | |
| 136 | *pos++ = WLAN_EID_IBSS_PARAMS; |
| 137 | *pos++ = 2; |
| 138 | /* FIX: set ATIM window based on scan results */ |
| 139 | *pos++ = 0; |
| 140 | *pos++ = 0; |
| 141 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 142 | if (csa_settings) { |
| 143 | *pos++ = WLAN_EID_CHANNEL_SWITCH; |
| 144 | *pos++ = 3; |
| 145 | *pos++ = csa_settings->block_tx ? 1 : 0; |
| 146 | *pos++ = ieee80211_frequency_to_channel( |
| 147 | csa_settings->chandef.chan->center_freq); |
John Crispin | 8552a43 | 2020-08-11 10:01:04 +0200 | [diff] [blame] | 148 | presp->cntdwn_counter_offsets[0] = (pos - presp->head); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 149 | *pos++ = csa_settings->count; |
John Crispin | 8552a43 | 2020-08-11 10:01:04 +0200 | [diff] [blame] | 150 | presp->cntdwn_current_counter = csa_settings->count; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 151 | } |
| 152 | |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 153 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
| 154 | if (rates_n > 8) { |
| 155 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 156 | *pos++ = rates_n - 8; |
| 157 | for (; ri < sband->n_bitrates; ri++) { |
| 158 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 159 | 5 * (1 << shift)); |
| 160 | u8 basic = 0; |
| 161 | if (!(rates & BIT(ri))) |
| 162 | continue; |
| 163 | |
| 164 | if (basic_rates & BIT(ri)) |
| 165 | basic = 0x80; |
| 166 | *pos++ = basic | (u8) rate; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | if (ifibss->ie_len) { |
| 171 | memcpy(pos, ifibss->ie, ifibss->ie_len); |
| 172 | pos += ifibss->ie_len; |
| 173 | } |
| 174 | |
| 175 | /* add HT capability and information IEs */ |
| 176 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
| 177 | chandef->width != NL80211_CHAN_WIDTH_5 && |
| 178 | chandef->width != NL80211_CHAN_WIDTH_10 && |
| 179 | sband->ht_cap.ht_supported) { |
| 180 | struct ieee80211_sta_ht_cap ht_cap; |
| 181 | |
| 182 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
| 183 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
| 184 | |
| 185 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); |
| 186 | /* |
| 187 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection |
| 188 | * field and RIFS Mode are reserved in IBSS mode, therefore |
| 189 | * keep them at 0 |
| 190 | */ |
| 191 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
Arik Nemtsov | 57f255f | 2015-10-25 10:59:34 +0200 | [diff] [blame] | 192 | chandef, 0, false); |
Janusz.Dziedzic@tieto.com | abcff6e | 2015-03-20 06:37:01 +0100 | [diff] [blame] | 193 | |
| 194 | /* add VHT capability and information IEs */ |
| 195 | if (chandef->width != NL80211_CHAN_WIDTH_20 && |
| 196 | chandef->width != NL80211_CHAN_WIDTH_40 && |
| 197 | sband->vht_cap.vht_supported) { |
| 198 | pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, |
| 199 | sband->vht_cap.cap); |
| 200 | pos = ieee80211_ie_build_vht_oper(pos, &sband->vht_cap, |
| 201 | chandef); |
| 202 | } |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 203 | } |
| 204 | |
Arik Nemtsov | 40b861a | 2014-07-17 17:14:23 +0300 | [diff] [blame] | 205 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
| 206 | pos = ieee80211_add_wmm_info_ie(pos, 0); /* U-APSD not in use */ |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 207 | |
| 208 | presp->head_len = pos - presp->head; |
| 209 | if (WARN_ON(presp->head_len > frame_len)) |
| 210 | goto error; |
| 211 | |
| 212 | return presp; |
| 213 | error: |
| 214 | kfree(presp); |
| 215 | return NULL; |
| 216 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 217 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 218 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 219 | const u8 *bssid, const int beacon_int, |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 220 | struct cfg80211_chan_def *req_chandef, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 221 | const u32 basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 222 | const u16 capability, u64 tsf, |
| 223 | bool creator) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 224 | { |
| 225 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 226 | struct ieee80211_local *local = sdata->local; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 227 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | f446d10 | 2009-10-28 15:12:32 +0100 | [diff] [blame] | 228 | struct cfg80211_bss *bss; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 229 | u32 bss_change; |
Johannes Berg | 683b6d3 | 2012-11-08 21:25:48 +0100 | [diff] [blame] | 230 | struct cfg80211_chan_def chandef; |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 231 | struct ieee80211_channel *chan; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 232 | struct beacon_data *presp; |
Johannes Berg | 61f6bba | 2015-10-13 11:36:21 +0200 | [diff] [blame] | 233 | struct cfg80211_inform_bss bss_meta = {}; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 234 | bool have_higher_than_11mbit; |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 235 | bool radar_required; |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 236 | int err; |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 237 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 238 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 239 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 240 | /* Reset own TSF to allow time synchronization work. */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 241 | drv_reset_tsf(local, sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 242 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 243 | if (!ether_addr_equal(ifibss->bssid, bssid)) |
Johannes Berg | b998e8b | 2012-12-13 23:07:46 +0100 | [diff] [blame] | 244 | sta_info_flush(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 245 | |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 246 | /* if merging, indicate to driver that we leave the old IBSS */ |
| 247 | if (sdata->vif.bss_conf.ibss_joined) { |
| 248 | sdata->vif.bss_conf.ibss_joined = false; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 249 | sdata->vif.bss_conf.ibss_creator = false; |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 250 | sdata->vif.bss_conf.enable_beacon = false; |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 251 | netif_carrier_off(sdata->dev); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 252 | ieee80211_bss_info_change_notify(sdata, |
| 253 | BSS_CHANGED_IBSS | |
| 254 | BSS_CHANGED_BEACON_ENABLED); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 255 | drv_leave_ibss(local, sdata); |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 256 | } |
| 257 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 258 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 259 | lockdep_is_held(&sdata->wdev.mtx)); |
Monam Agarwal | 0c2bef46 | 2014-03-24 00:51:43 +0530 | [diff] [blame] | 260 | RCU_INIT_POINTER(ifibss->presp, NULL); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 261 | if (presp) |
| 262 | kfree_rcu(presp, rcu_head); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 263 | |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 264 | /* make a copy of the chandef, it could be modified below. */ |
| 265 | chandef = *req_chandef; |
| 266 | chan = chandef.chan; |
Ilan Peer | 174e0cd | 2014-02-23 09:13:01 +0200 | [diff] [blame] | 267 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
| 268 | NL80211_IFTYPE_ADHOC)) { |
Simon Wunderlich | 4b42aab | 2013-07-08 16:55:57 +0200 | [diff] [blame] | 269 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
| 270 | chandef.width == NL80211_CHAN_WIDTH_10 || |
| 271 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
| 272 | chandef.width == NL80211_CHAN_WIDTH_20) { |
| 273 | sdata_info(sdata, |
| 274 | "Failed to join IBSS, beacons forbidden\n"); |
| 275 | return; |
| 276 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 277 | chandef.width = NL80211_CHAN_WIDTH_20; |
| 278 | chandef.center_freq1 = chan->center_freq; |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 279 | /* check again for downgraded chandef */ |
Ilan Peer | 174e0cd | 2014-02-23 09:13:01 +0200 | [diff] [blame] | 280 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
| 281 | NL80211_IFTYPE_ADHOC)) { |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 282 | sdata_info(sdata, |
| 283 | "Failed to join IBSS, beacons forbidden\n"); |
| 284 | return; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 289 | &chandef, NL80211_IFTYPE_ADHOC); |
Luciano Coelho | 6658ab8 | 2014-02-20 16:36:23 +0200 | [diff] [blame] | 290 | if (err < 0) { |
| 291 | sdata_info(sdata, |
| 292 | "Failed to join IBSS, invalid chandef\n"); |
| 293 | return; |
| 294 | } |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 295 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
| 296 | sdata_info(sdata, |
| 297 | "Failed to join IBSS, DFS channel without control program\n"); |
| 298 | return; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 299 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 300 | |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 301 | radar_required = err; |
| 302 | |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 303 | mutex_lock(&local->mtx); |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 304 | if (ieee80211_vif_use_channel(sdata, &chandef, |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 305 | ifibss->fixed_channel ? |
| 306 | IEEE80211_CHANCTX_SHARED : |
| 307 | IEEE80211_CHANCTX_EXCLUSIVE)) { |
| 308 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 309 | mutex_unlock(&local->mtx); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 310 | return; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 311 | } |
Michal Kazior | cc901de | 2014-01-29 07:56:20 +0100 | [diff] [blame] | 312 | sdata->radar_required = radar_required; |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 313 | mutex_unlock(&local->mtx); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 314 | |
| 315 | memcpy(ifibss->bssid, bssid, ETH_ALEN); |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 316 | |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 317 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
| 318 | capability, tsf, &chandef, |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 319 | &have_higher_than_11mbit, NULL); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 320 | if (!presp) |
| 321 | return; |
| 322 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 323 | rcu_assign_pointer(ifibss->presp, presp); |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 324 | mgmt = (void *)presp->head; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 325 | |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 326 | sdata->vif.bss_conf.enable_beacon = true; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 327 | sdata->vif.bss_conf.beacon_int = beacon_int; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 328 | sdata->vif.bss_conf.basic_rates = basic_rates; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 329 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
| 330 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 331 | bss_change = BSS_CHANGED_BEACON_INT; |
| 332 | bss_change |= ieee80211_reset_erp_info(sdata); |
| 333 | bss_change |= BSS_CHANGED_BSSID; |
| 334 | bss_change |= BSS_CHANGED_BEACON; |
| 335 | bss_change |= BSS_CHANGED_BEACON_ENABLED; |
Teemu Paasikivi | 392cfdb | 2010-06-14 12:55:32 +0300 | [diff] [blame] | 336 | bss_change |= BSS_CHANGED_BASIC_RATES; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 337 | bss_change |= BSS_CHANGED_HT; |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 338 | bss_change |= BSS_CHANGED_IBSS; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 339 | bss_change |= BSS_CHANGED_SSID; |
Simon Wunderlich | 2f91a967 | 2012-12-03 22:21:30 +0100 | [diff] [blame] | 340 | |
| 341 | /* |
| 342 | * In 5 GHz/802.11a, we can always use short slot time. |
| 343 | * (IEEE 802.11-2012 18.3.8.7) |
| 344 | * |
| 345 | * In 2.4GHz, we must always use long slots in IBSS for compatibility |
| 346 | * reasons. |
| 347 | * (IEEE 802.11-2012 19.4.5) |
| 348 | * |
| 349 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) |
| 350 | */ |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 351 | sdata->vif.bss_conf.use_short_slot = chan->band == NL80211_BAND_5GHZ; |
Simon Wunderlich | 2f91a967 | 2012-12-03 22:21:30 +0100 | [diff] [blame] | 352 | bss_change |= BSS_CHANGED_ERP_SLOT; |
| 353 | |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 354 | /* cf. IEEE 802.11 9.2.12 */ |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 355 | if (chan->band == NL80211_BAND_2GHZ && have_higher_than_11mbit) |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 356 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| 357 | else |
| 358 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| 359 | |
Johannes Berg | cec6628 | 2015-10-22 17:46:04 +0200 | [diff] [blame] | 360 | ieee80211_set_wmm_default(sdata, true, false); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 361 | |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 362 | sdata->vif.bss_conf.ibss_joined = true; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 363 | sdata->vif.bss_conf.ibss_creator = creator; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 364 | |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 365 | err = drv_join_ibss(local, sdata); |
| 366 | if (err) { |
| 367 | sdata->vif.bss_conf.ibss_joined = false; |
| 368 | sdata->vif.bss_conf.ibss_creator = false; |
| 369 | sdata->vif.bss_conf.enable_beacon = false; |
| 370 | sdata->vif.bss_conf.ssid_len = 0; |
| 371 | RCU_INIT_POINTER(ifibss->presp, NULL); |
| 372 | kfree_rcu(presp, rcu_head); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 373 | mutex_lock(&local->mtx); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 374 | ieee80211_vif_release_channel(sdata); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 375 | mutex_unlock(&local->mtx); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 376 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
| 377 | err); |
| 378 | return; |
| 379 | } |
| 380 | |
| 381 | ieee80211_bss_info_change_notify(sdata, bss_change); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 382 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 383 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 384 | mod_timer(&ifibss->timer, |
| 385 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 386 | |
Johannes Berg | 61f6bba | 2015-10-13 11:36:21 +0200 | [diff] [blame] | 387 | bss_meta.chan = chan; |
| 388 | bss_meta.scan_width = cfg80211_chandef_to_scan_width(&chandef); |
| 389 | bss = cfg80211_inform_bss_frame_data(local->hw.wiphy, &bss_meta, mgmt, |
| 390 | presp->head_len, GFP_KERNEL); |
| 391 | |
Johannes Berg | 5b112d3 | 2013-02-01 01:49:58 +0100 | [diff] [blame] | 392 | cfg80211_put_bss(local->hw.wiphy, bss); |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 393 | netif_carrier_on(sdata->dev); |
Antonio Quartulli | fe94f3a | 2014-01-29 17:53:43 +0100 | [diff] [blame] | 394 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 395 | } |
| 396 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 397 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 398 | struct ieee80211_bss *bss) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 399 | { |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 400 | struct cfg80211_bss *cbss = |
| 401 | container_of((void *)bss, struct cfg80211_bss, priv); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 402 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 403 | struct cfg80211_chan_def chandef; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 404 | u32 basic_rates; |
| 405 | int i, j; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 406 | u16 beacon_int = cbss->beacon_interval; |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 407 | const struct cfg80211_bss_ies *ies; |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 408 | enum nl80211_channel_type chan_type; |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 409 | u64 tsf; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 410 | u32 rate_flags; |
| 411 | int shift; |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 412 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 413 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 414 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 415 | if (beacon_int < 10) |
| 416 | beacon_int = 10; |
| 417 | |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 418 | switch (sdata->u.ibss.chandef.width) { |
| 419 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 420 | case NL80211_CHAN_WIDTH_20: |
| 421 | case NL80211_CHAN_WIDTH_40: |
| 422 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); |
| 423 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); |
| 424 | break; |
| 425 | case NL80211_CHAN_WIDTH_5: |
| 426 | case NL80211_CHAN_WIDTH_10: |
| 427 | cfg80211_chandef_create(&chandef, cbss->channel, |
Matthias Kaehlcke | a4ac6f2 | 2017-04-17 13:59:53 -0700 | [diff] [blame] | 428 | NL80211_CHAN_NO_HT); |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 429 | chandef.width = sdata->u.ibss.chandef.width; |
| 430 | break; |
Janusz.Dziedzic@tieto.com | abcff6e | 2015-03-20 06:37:01 +0100 | [diff] [blame] | 431 | case NL80211_CHAN_WIDTH_80: |
Jouni Malinen | c39b336 | 2015-11-26 20:49:38 +0200 | [diff] [blame] | 432 | case NL80211_CHAN_WIDTH_80P80: |
Janusz.Dziedzic@tieto.com | abcff6e | 2015-03-20 06:37:01 +0100 | [diff] [blame] | 433 | case NL80211_CHAN_WIDTH_160: |
| 434 | chandef = sdata->u.ibss.chandef; |
| 435 | chandef.chan = cbss->channel; |
| 436 | break; |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 437 | default: |
| 438 | /* fall back to 20 MHz for unsupported modes */ |
| 439 | cfg80211_chandef_create(&chandef, cbss->channel, |
Matthias Kaehlcke | a4ac6f2 | 2017-04-17 13:59:53 -0700 | [diff] [blame] | 440 | NL80211_CHAN_NO_HT); |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 441 | break; |
| 442 | } |
| 443 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 444 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 445 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
| 446 | shift = ieee80211_vif_get_shift(&sdata->vif); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 447 | |
| 448 | basic_rates = 0; |
| 449 | |
| 450 | for (i = 0; i < bss->supp_rates_len; i++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 451 | int rate = bss->supp_rates[i] & 0x7f; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 452 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
| 453 | |
| 454 | for (j = 0; j < sband->n_bitrates; j++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 455 | int brate; |
| 456 | if ((rate_flags & sband->bitrates[j].flags) |
| 457 | != rate_flags) |
| 458 | continue; |
| 459 | |
| 460 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, |
| 461 | 5 * (1 << shift)); |
| 462 | if (brate == rate) { |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 463 | if (is_basic) |
| 464 | basic_rates |= BIT(j); |
| 465 | break; |
| 466 | } |
| 467 | } |
| 468 | } |
| 469 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 470 | rcu_read_lock(); |
| 471 | ies = rcu_dereference(cbss->ies); |
| 472 | tsf = ies->tsf; |
| 473 | rcu_read_unlock(); |
| 474 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 475 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 476 | beacon_int, |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 477 | &chandef, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 478 | basic_rates, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 479 | cbss->capability, |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 480 | tsf, false); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 481 | } |
| 482 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 483 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
| 484 | struct cfg80211_csa_settings *csa_settings) |
| 485 | { |
| 486 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 487 | struct beacon_data *presp, *old_presp; |
| 488 | struct cfg80211_bss *cbss; |
| 489 | const struct cfg80211_bss_ies *ies; |
Koen Vandeputte | f181d6a | 2017-02-08 15:32:05 +0100 | [diff] [blame] | 490 | u16 capability = WLAN_CAPABILITY_IBSS; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 491 | u64 tsf; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 492 | |
| 493 | sdata_assert_lock(sdata); |
| 494 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 495 | if (ifibss->privacy) |
Koen Vandeputte | f181d6a | 2017-02-08 15:32:05 +0100 | [diff] [blame] | 496 | capability |= WLAN_CAPABILITY_PRIVACY; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 497 | |
| 498 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, |
| 499 | ifibss->bssid, ifibss->ssid, |
Dedy Lansky | 6eb1813 | 2015-02-08 15:52:03 +0200 | [diff] [blame] | 500 | ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS, |
| 501 | IEEE80211_PRIVACY(ifibss->privacy)); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 502 | |
dingsenjie | 0323689 | 2021-08-05 14:43:49 +0800 | [diff] [blame] | 503 | if (WARN_ON(!cbss)) |
| 504 | return -EINVAL; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 505 | |
| 506 | rcu_read_lock(); |
| 507 | ies = rcu_dereference(cbss->ies); |
| 508 | tsf = ies->tsf; |
| 509 | rcu_read_unlock(); |
| 510 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
| 511 | |
| 512 | old_presp = rcu_dereference_protected(ifibss->presp, |
| 513 | lockdep_is_held(&sdata->wdev.mtx)); |
| 514 | |
| 515 | presp = ieee80211_ibss_build_presp(sdata, |
| 516 | sdata->vif.bss_conf.beacon_int, |
| 517 | sdata->vif.bss_conf.basic_rates, |
| 518 | capability, tsf, &ifibss->chandef, |
| 519 | NULL, csa_settings); |
dingsenjie | 0323689 | 2021-08-05 14:43:49 +0800 | [diff] [blame] | 520 | if (!presp) |
| 521 | return -ENOMEM; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 522 | |
| 523 | rcu_assign_pointer(ifibss->presp, presp); |
| 524 | if (old_presp) |
| 525 | kfree_rcu(old_presp, rcu_head); |
| 526 | |
Luciano Coelho | dddd586 | 2013-12-13 21:13:51 +0200 | [diff] [blame] | 527 | return BSS_CHANGED_BEACON; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata) |
| 531 | { |
| 532 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 533 | struct cfg80211_bss *cbss; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 534 | |
Simon Wunderlich | bafdc61 | 2013-12-05 19:54:43 +0100 | [diff] [blame] | 535 | sdata_assert_lock(sdata); |
| 536 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 537 | /* update cfg80211 bss information with the new channel */ |
| 538 | if (!is_zero_ether_addr(ifibss->bssid)) { |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 539 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
| 540 | ifibss->chandef.chan, |
| 541 | ifibss->bssid, ifibss->ssid, |
Dedy Lansky | 6eb1813 | 2015-02-08 15:52:03 +0200 | [diff] [blame] | 542 | ifibss->ssid_len, |
| 543 | IEEE80211_BSS_TYPE_IBSS, |
| 544 | IEEE80211_PRIVACY(ifibss->privacy)); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 545 | /* XXX: should not really modify cfg80211 data */ |
| 546 | if (cbss) { |
Luciano Coelho | 33787fc | 2013-11-11 20:34:54 +0200 | [diff] [blame] | 547 | cbss->channel = sdata->csa_chandef.chan; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 548 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
| 549 | } |
| 550 | } |
| 551 | |
Luciano Coelho | 33787fc | 2013-11-11 20:34:54 +0200 | [diff] [blame] | 552 | ifibss->chandef = sdata->csa_chandef; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 553 | |
| 554 | /* generate the beacon */ |
Koen Vandeputte | 020fa0f | 2019-09-11 16:14:31 +0200 | [diff] [blame] | 555 | return ieee80211_ibss_csa_beacon(sdata, NULL); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) |
| 559 | { |
| 560 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 561 | |
| 562 | cancel_work_sync(&ifibss->csa_connection_drop_work); |
| 563 | } |
| 564 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 565 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 566 | __acquires(RCU) |
| 567 | { |
| 568 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 569 | u8 addr[ETH_ALEN]; |
| 570 | |
| 571 | memcpy(addr, sta->sta.addr, ETH_ALEN); |
| 572 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 573 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 574 | |
Johannes Berg | 83d5cc0 | 2012-01-12 09:31:10 +0100 | [diff] [blame] | 575 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
| 576 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 577 | /* authorize the station only if the network is not RSN protected. If |
| 578 | * not wait for the userspace to authorize it */ |
| 579 | if (!sta->sdata->u.ibss.control_port) |
| 580 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 581 | |
| 582 | rate_control_rate_init(sta); |
| 583 | |
| 584 | /* If it fails, maybe we raced another insertion? */ |
| 585 | if (sta_info_insert_rcu(sta)) |
| 586 | return sta_info_get(sdata, addr); |
| 587 | return sta; |
| 588 | } |
| 589 | |
| 590 | static struct sta_info * |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 591 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
| 592 | const u8 *addr, u32 supp_rates) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 593 | __acquires(RCU) |
| 594 | { |
| 595 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 596 | struct ieee80211_local *local = sdata->local; |
| 597 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 598 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6cd | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 599 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 600 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 601 | int band; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 602 | |
| 603 | /* |
| 604 | * XXX: Consider removing the least recently used entry and |
| 605 | * allow new one to be added. |
| 606 | */ |
| 607 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 608 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 609 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 610 | rcu_read_lock(); |
| 611 | return NULL; |
| 612 | } |
| 613 | |
| 614 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { |
| 615 | rcu_read_lock(); |
| 616 | return NULL; |
| 617 | } |
| 618 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 619 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 620 | rcu_read_lock(); |
| 621 | return NULL; |
| 622 | } |
| 623 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 624 | rcu_read_lock(); |
| 625 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 626 | if (WARN_ON_ONCE(!chanctx_conf)) |
| 627 | return NULL; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 628 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 629 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 630 | rcu_read_unlock(); |
| 631 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 632 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
| 633 | if (!sta) { |
| 634 | rcu_read_lock(); |
| 635 | return NULL; |
| 636 | } |
| 637 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 638 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6cd | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 639 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 640 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 641 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 642 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 643 | return ieee80211_ibss_finish_sta(sta); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 644 | } |
| 645 | |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 646 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
| 647 | { |
| 648 | struct ieee80211_local *local = sdata->local; |
| 649 | int active = 0; |
| 650 | struct sta_info *sta; |
| 651 | |
| 652 | sdata_assert_lock(sdata); |
| 653 | |
| 654 | rcu_read_lock(); |
| 655 | |
| 656 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
Johannes Berg | b8da6b6 | 2016-03-31 20:02:07 +0300 | [diff] [blame] | 657 | unsigned long last_active = ieee80211_sta_last_active(sta); |
| 658 | |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 659 | if (sta->sdata == sdata && |
Johannes Berg | b8da6b6 | 2016-03-31 20:02:07 +0300 | [diff] [blame] | 660 | time_is_after_jiffies(last_active + |
| 661 | IEEE80211_IBSS_MERGE_INTERVAL)) { |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 662 | active++; |
| 663 | break; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | rcu_read_unlock(); |
| 668 | |
| 669 | return active; |
| 670 | } |
| 671 | |
| 672 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) |
| 673 | { |
| 674 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 675 | struct ieee80211_local *local = sdata->local; |
| 676 | struct cfg80211_bss *cbss; |
| 677 | struct beacon_data *presp; |
| 678 | struct sta_info *sta; |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 679 | |
Sujith Manoharan | d4c80d9 | 2014-01-30 14:17:28 +0530 | [diff] [blame] | 680 | if (!is_zero_ether_addr(ifibss->bssid)) { |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 681 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
| 682 | ifibss->bssid, ifibss->ssid, |
Dedy Lansky | 6eb1813 | 2015-02-08 15:52:03 +0200 | [diff] [blame] | 683 | ifibss->ssid_len, |
| 684 | IEEE80211_BSS_TYPE_IBSS, |
| 685 | IEEE80211_PRIVACY(ifibss->privacy)); |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 686 | |
| 687 | if (cbss) { |
| 688 | cfg80211_unlink_bss(local->hw.wiphy, cbss); |
| 689 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; |
| 694 | |
| 695 | sta_info_flush(sdata); |
| 696 | |
| 697 | spin_lock_bh(&ifibss->incomplete_lock); |
| 698 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 699 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 700 | struct sta_info, list); |
| 701 | list_del(&sta->list); |
| 702 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 703 | |
| 704 | sta_info_free(local, sta); |
| 705 | spin_lock_bh(&ifibss->incomplete_lock); |
| 706 | } |
| 707 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 708 | |
| 709 | netif_carrier_off(sdata->dev); |
| 710 | |
| 711 | sdata->vif.bss_conf.ibss_joined = false; |
| 712 | sdata->vif.bss_conf.ibss_creator = false; |
| 713 | sdata->vif.bss_conf.enable_beacon = false; |
| 714 | sdata->vif.bss_conf.ssid_len = 0; |
| 715 | |
| 716 | /* remove beacon */ |
| 717 | presp = rcu_dereference_protected(ifibss->presp, |
| 718 | lockdep_is_held(&sdata->wdev.mtx)); |
| 719 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
| 720 | if (presp) |
| 721 | kfree_rcu(presp, rcu_head); |
| 722 | |
| 723 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); |
| 724 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | |
| 725 | BSS_CHANGED_IBSS); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 726 | drv_leave_ibss(local, sdata); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 727 | mutex_lock(&local->mtx); |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 728 | ieee80211_vif_release_channel(sdata); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 729 | mutex_unlock(&local->mtx); |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 730 | } |
| 731 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 732 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
| 733 | { |
| 734 | struct ieee80211_sub_if_data *sdata = |
| 735 | container_of(work, struct ieee80211_sub_if_data, |
| 736 | u.ibss.csa_connection_drop_work); |
| 737 | |
Luciano Coelho | 6f07d21 | 2013-12-11 20:39:46 +0200 | [diff] [blame] | 738 | sdata_lock(sdata); |
| 739 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 740 | ieee80211_ibss_disconnect(sdata); |
| 741 | synchronize_rcu(); |
| 742 | skb_queue_purge(&sdata->skb_queue); |
| 743 | |
| 744 | /* trigger a scan to find another IBSS network to join */ |
| 745 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Luciano Coelho | 6f07d21 | 2013-12-11 20:39:46 +0200 | [diff] [blame] | 746 | |
| 747 | sdata_unlock(sdata); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 748 | } |
| 749 | |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 750 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
| 751 | { |
| 752 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 753 | int err; |
| 754 | |
| 755 | /* if the current channel is a DFS channel, mark the channel as |
| 756 | * unavailable. |
| 757 | */ |
| 758 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 759 | &ifibss->chandef, |
| 760 | NL80211_IFTYPE_ADHOC); |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 761 | if (err > 0) |
| 762 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, |
| 763 | GFP_ATOMIC); |
| 764 | } |
| 765 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 766 | static bool |
| 767 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
| 768 | struct ieee802_11_elems *elems, |
| 769 | bool beacon) |
| 770 | { |
| 771 | struct cfg80211_csa_settings params; |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 772 | struct ieee80211_csa_ie csa_ie; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 773 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 774 | enum nl80211_channel_type ch_type; |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 775 | int err; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 776 | u32 sta_flags; |
Johannes Berg | 2a333a0 | 2020-05-28 21:34:35 +0200 | [diff] [blame] | 777 | u32 vht_cap_info = 0; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 778 | |
Michal Kazior | dbd7285 | 2014-01-29 07:56:21 +0100 | [diff] [blame] | 779 | sdata_assert_lock(sdata); |
| 780 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 781 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
| 782 | switch (ifibss->chandef.width) { |
| 783 | case NL80211_CHAN_WIDTH_5: |
| 784 | case NL80211_CHAN_WIDTH_10: |
| 785 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 786 | sta_flags |= IEEE80211_STA_DISABLE_HT; |
Gustavo A. R. Silva | fc0561d | 2020-07-07 15:45:48 -0500 | [diff] [blame] | 787 | fallthrough; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 788 | case NL80211_CHAN_WIDTH_20: |
| 789 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; |
| 790 | break; |
| 791 | default: |
| 792 | break; |
| 793 | } |
| 794 | |
Johannes Berg | 2a333a0 | 2020-05-28 21:34:35 +0200 | [diff] [blame] | 795 | if (elems->vht_cap_elem) |
| 796 | vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); |
| 797 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 798 | memset(¶ms, 0, sizeof(params)); |
Luciano Coelho | 84469a4 | 2014-10-28 13:33:04 +0200 | [diff] [blame] | 799 | err = ieee80211_parse_ch_switch_ie(sdata, elems, |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 800 | ifibss->chandef.chan->band, |
Johannes Berg | 2a333a0 | 2020-05-28 21:34:35 +0200 | [diff] [blame] | 801 | vht_cap_info, |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 802 | sta_flags, ifibss->bssid, &csa_ie); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 803 | /* can't switch to destination channel, fail */ |
| 804 | if (err < 0) |
| 805 | goto disconnect; |
| 806 | |
| 807 | /* did not contain a CSA */ |
| 808 | if (err) |
| 809 | return false; |
| 810 | |
Simon Wunderlich | 0834ae3 | 2013-11-26 16:45:18 +0100 | [diff] [blame] | 811 | /* channel switch is not supported, disconnect */ |
| 812 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) |
| 813 | goto disconnect; |
| 814 | |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 815 | params.count = csa_ie.count; |
| 816 | params.chandef = csa_ie.chandef; |
| 817 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 818 | switch (ifibss->chandef.width) { |
| 819 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 820 | case NL80211_CHAN_WIDTH_20: |
| 821 | case NL80211_CHAN_WIDTH_40: |
| 822 | /* keep our current HT mode (HT20/HT40+/HT40-), even if |
| 823 | * another mode has been announced. The mode is not adopted |
| 824 | * within the beacon while doing CSA and we should therefore |
| 825 | * keep the mode which we announce. |
| 826 | */ |
| 827 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); |
| 828 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, |
| 829 | ch_type); |
| 830 | break; |
| 831 | case NL80211_CHAN_WIDTH_5: |
| 832 | case NL80211_CHAN_WIDTH_10: |
| 833 | if (params.chandef.width != ifibss->chandef.width) { |
| 834 | sdata_info(sdata, |
| 835 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", |
| 836 | ifibss->bssid, |
| 837 | params.chandef.chan->center_freq, |
| 838 | params.chandef.width, |
| 839 | params.chandef.center_freq1, |
| 840 | params.chandef.center_freq2); |
| 841 | goto disconnect; |
| 842 | } |
| 843 | break; |
| 844 | default: |
| 845 | /* should not happen, sta_flags should prevent VHT modes. */ |
| 846 | WARN_ON(1); |
| 847 | goto disconnect; |
| 848 | } |
| 849 | |
Ilan Peer | 174e0cd | 2014-02-23 09:13:01 +0200 | [diff] [blame] | 850 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
| 851 | NL80211_IFTYPE_ADHOC)) { |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 852 | sdata_info(sdata, |
| 853 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", |
| 854 | ifibss->bssid, |
| 855 | params.chandef.chan->center_freq, |
| 856 | params.chandef.width, |
| 857 | params.chandef.center_freq1, |
| 858 | params.chandef.center_freq2); |
| 859 | goto disconnect; |
| 860 | } |
| 861 | |
| 862 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 863 | ¶ms.chandef, |
| 864 | NL80211_IFTYPE_ADHOC); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 865 | if (err < 0) |
| 866 | goto disconnect; |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 867 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 868 | /* IBSS-DFS only allowed with a control program */ |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 869 | goto disconnect; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 870 | } |
| 871 | |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 872 | params.radar_required = err; |
| 873 | |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 874 | if (cfg80211_chandef_identical(¶ms.chandef, |
| 875 | &sdata->vif.bss_conf.chandef)) { |
| 876 | ibss_dbg(sdata, |
| 877 | "received csa with an identical chandef, ignoring\n"); |
| 878 | return true; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 879 | } |
| 880 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 881 | /* all checks done, now perform the channel switch. */ |
| 882 | ibss_dbg(sdata, |
| 883 | "received channel switch announcement to go to channel %d MHz\n", |
| 884 | params.chandef.chan->center_freq); |
| 885 | |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 886 | params.block_tx = !!csa_ie.mode; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 887 | |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 888 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
| 889 | ¶ms)) |
| 890 | goto disconnect; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 891 | |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 892 | ieee80211_ibss_csa_mark_radar(sdata); |
| 893 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 894 | return true; |
| 895 | disconnect: |
| 896 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); |
| 897 | ieee80211_queue_work(&sdata->local->hw, |
| 898 | &ifibss->csa_connection_drop_work); |
| 899 | |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 900 | ieee80211_ibss_csa_mark_radar(sdata); |
| 901 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 902 | return true; |
| 903 | } |
| 904 | |
| 905 | static void |
| 906 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, |
| 907 | struct ieee80211_mgmt *mgmt, size_t len, |
| 908 | struct ieee80211_rx_status *rx_status, |
| 909 | struct ieee802_11_elems *elems) |
| 910 | { |
| 911 | int required_len; |
| 912 | |
| 913 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 914 | return; |
| 915 | |
| 916 | /* CSA is the only action we handle for now */ |
| 917 | if (mgmt->u.action.u.measurement.action_code != |
| 918 | WLAN_ACTION_SPCT_CHL_SWITCH) |
| 919 | return; |
| 920 | |
| 921 | required_len = IEEE80211_MIN_ACTION_SIZE + |
| 922 | sizeof(mgmt->u.action.u.chan_switch); |
| 923 | if (len < required_len) |
| 924 | return; |
| 925 | |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 926 | if (!sdata->vif.csa_active) |
| 927 | ieee80211_ibss_process_chanswitch(sdata, elems, false); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 928 | } |
| 929 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 930 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
| 931 | struct ieee80211_mgmt *mgmt, |
| 932 | size_t len) |
| 933 | { |
| 934 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); |
| 935 | |
| 936 | if (len < IEEE80211_DEAUTH_FRAME_LEN) |
| 937 | return; |
| 938 | |
Emmanuel Grumbach | c6e57b3 | 2018-08-31 11:31:13 +0300 | [diff] [blame] | 939 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
| 940 | ibss_dbg(sdata, "\tBSSID=%pM (reason: %d)\n", mgmt->bssid, reason); |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 941 | sta_info_destroy_addr(sdata, mgmt->sa); |
| 942 | } |
| 943 | |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 944 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
| 945 | struct ieee80211_mgmt *mgmt, |
| 946 | size_t len) |
| 947 | { |
| 948 | u16 auth_alg, auth_transaction; |
| 949 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 950 | sdata_assert_lock(sdata); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 951 | |
| 952 | if (len < 24 + 6) |
| 953 | return; |
| 954 | |
| 955 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
| 956 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
| 957 | |
Emmanuel Grumbach | c6e57b3 | 2018-08-31 11:31:13 +0300 | [diff] [blame] | 958 | ibss_dbg(sdata, "RX Auth SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
| 959 | ibss_dbg(sdata, "\tBSSID=%pM (auth_transaction=%d)\n", |
| 960 | mgmt->bssid, auth_transaction); |
Antonio Quartulli | 7bed205 | 2012-11-25 23:24:27 +0100 | [diff] [blame] | 961 | |
| 962 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
| 963 | return; |
| 964 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 965 | /* |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 966 | * IEEE 802.11 standard does not require authentication in IBSS |
| 967 | * networks and most implementations do not seem to use it. |
| 968 | * However, try to reply to authentication attempts if someone |
| 969 | * has actually implemented this. |
| 970 | */ |
Jouni Malinen | 700e8ea | 2012-09-30 19:29:37 +0300 | [diff] [blame] | 971 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
Johannes Berg | 1672c0e3 | 2013-01-29 15:02:27 +0100 | [diff] [blame] | 972 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 973 | } |
| 974 | |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 975 | static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata, |
| 976 | struct ieee80211_mgmt *mgmt, size_t len, |
| 977 | struct ieee80211_rx_status *rx_status, |
| 978 | struct ieee802_11_elems *elems, |
| 979 | struct ieee80211_channel *channel) |
| 980 | { |
| 981 | struct sta_info *sta; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 982 | enum nl80211_band band = rx_status->band; |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 983 | enum nl80211_bss_scan_width scan_width; |
| 984 | struct ieee80211_local *local = sdata->local; |
Mohammed Shafi Shajakhan | 21a8e9d | 2017-04-27 12:45:38 +0530 | [diff] [blame] | 985 | struct ieee80211_supported_band *sband; |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 986 | bool rates_updated = false; |
| 987 | u32 supp_rates = 0; |
| 988 | |
| 989 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 990 | return; |
| 991 | |
| 992 | if (!ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) |
| 993 | return; |
| 994 | |
Mohammed Shafi Shajakhan | 21a8e9d | 2017-04-27 12:45:38 +0530 | [diff] [blame] | 995 | sband = local->hw.wiphy->bands[band]; |
| 996 | if (WARN_ON(!sband)) |
| 997 | return; |
| 998 | |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 999 | rcu_read_lock(); |
| 1000 | sta = sta_info_get(sdata, mgmt->sa); |
| 1001 | |
| 1002 | if (elems->supp_rates) { |
| 1003 | supp_rates = ieee80211_sta_get_rates(sdata, elems, |
| 1004 | band, NULL); |
| 1005 | if (sta) { |
| 1006 | u32 prev_rates; |
| 1007 | |
| 1008 | prev_rates = sta->sta.supp_rates[band]; |
| 1009 | /* make sure mandatory rates are always added */ |
| 1010 | scan_width = NL80211_BSS_CHAN_WIDTH_20; |
Johannes Berg | da6a435 | 2017-04-26 12:14:59 +0200 | [diff] [blame] | 1011 | if (rx_status->bw == RATE_INFO_BW_5) |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1012 | scan_width = NL80211_BSS_CHAN_WIDTH_5; |
Johannes Berg | da6a435 | 2017-04-26 12:14:59 +0200 | [diff] [blame] | 1013 | else if (rx_status->bw == RATE_INFO_BW_10) |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1014 | scan_width = NL80211_BSS_CHAN_WIDTH_10; |
| 1015 | |
| 1016 | sta->sta.supp_rates[band] = supp_rates | |
| 1017 | ieee80211_mandatory_rates(sband, scan_width); |
| 1018 | if (sta->sta.supp_rates[band] != prev_rates) { |
| 1019 | ibss_dbg(sdata, |
| 1020 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", |
| 1021 | sta->sta.addr, prev_rates, |
| 1022 | sta->sta.supp_rates[band]); |
| 1023 | rates_updated = true; |
| 1024 | } |
| 1025 | } else { |
| 1026 | rcu_read_unlock(); |
| 1027 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, |
| 1028 | mgmt->sa, supp_rates); |
| 1029 | } |
| 1030 | } |
| 1031 | |
Johannes Berg | 96a4688e | 2015-05-11 14:01:36 +0200 | [diff] [blame] | 1032 | if (sta && !sta->sta.wme && |
Thomas Pedersen | 1d00ce8 | 2020-09-21 19:28:15 -0700 | [diff] [blame] | 1033 | (elems->wmm_info || elems->s1g_capab) && |
| 1034 | local->hw.queues >= IEEE80211_NUM_ACS) { |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1035 | sta->sta.wme = true; |
Johannes Berg | 96a4688e | 2015-05-11 14:01:36 +0200 | [diff] [blame] | 1036 | ieee80211_check_fast_xmit(sta); |
| 1037 | } |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1038 | |
| 1039 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
| 1040 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && |
| 1041 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && |
| 1042 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { |
| 1043 | /* we both use HT */ |
| 1044 | struct ieee80211_ht_cap htcap_ie; |
| 1045 | struct cfg80211_chan_def chandef; |
Janusz.Dziedzic@tieto.com | abcff6e | 2015-03-20 06:37:01 +0100 | [diff] [blame] | 1046 | enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth; |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1047 | |
Johannes Berg | 8ac3c704 | 2015-12-18 15:08:34 +0100 | [diff] [blame] | 1048 | cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); |
| 1049 | ieee80211_chandef_ht_oper(elems->ht_operation, &chandef); |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1050 | |
| 1051 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1052 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
| 1053 | &htcap_ie, |
| 1054 | sta); |
Janusz.Dziedzic@tieto.com | abcff6e | 2015-03-20 06:37:01 +0100 | [diff] [blame] | 1055 | |
| 1056 | if (elems->vht_operation && elems->vht_cap_elem && |
| 1057 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20 && |
| 1058 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_40) { |
| 1059 | /* we both use VHT */ |
| 1060 | struct ieee80211_vht_cap cap_ie; |
| 1061 | struct ieee80211_sta_vht_cap cap = sta->sta.vht_cap; |
Johannes Berg | 2a333a0 | 2020-05-28 21:34:35 +0200 | [diff] [blame] | 1062 | u32 vht_cap_info = |
| 1063 | le32_to_cpu(elems->vht_cap_elem->vht_cap_info); |
Janusz.Dziedzic@tieto.com | abcff6e | 2015-03-20 06:37:01 +0100 | [diff] [blame] | 1064 | |
Johannes Berg | 2a333a0 | 2020-05-28 21:34:35 +0200 | [diff] [blame] | 1065 | ieee80211_chandef_vht_oper(&local->hw, vht_cap_info, |
Johannes Berg | 7eb26df | 2018-08-31 11:31:18 +0300 | [diff] [blame] | 1066 | elems->vht_operation, |
| 1067 | elems->ht_operation, |
Johannes Berg | 8ac3c704 | 2015-12-18 15:08:34 +0100 | [diff] [blame] | 1068 | &chandef); |
Janusz.Dziedzic@tieto.com | abcff6e | 2015-03-20 06:37:01 +0100 | [diff] [blame] | 1069 | memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie)); |
| 1070 | ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, |
| 1071 | &cap_ie, sta); |
| 1072 | if (memcmp(&cap, &sta->sta.vht_cap, sizeof(cap))) |
| 1073 | rates_updated |= true; |
| 1074 | } |
| 1075 | |
| 1076 | if (bw != sta->sta.bandwidth) |
| 1077 | rates_updated |= true; |
| 1078 | |
| 1079 | if (!cfg80211_chandef_compatible(&sdata->u.ibss.chandef, |
| 1080 | &chandef)) |
| 1081 | WARN_ON_ONCE(1); |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1082 | } |
| 1083 | |
| 1084 | if (sta && rates_updated) { |
| 1085 | u32 changed = IEEE80211_RC_SUPP_RATES_CHANGED; |
| 1086 | u8 rx_nss = sta->sta.rx_nss; |
| 1087 | |
| 1088 | /* Force rx_nss recalculation */ |
| 1089 | sta->sta.rx_nss = 0; |
| 1090 | rate_control_rate_init(sta); |
| 1091 | if (sta->sta.rx_nss != rx_nss) |
| 1092 | changed |= IEEE80211_RC_NSS_CHANGED; |
| 1093 | |
| 1094 | drv_sta_rc_update(local, sdata, &sta->sta, changed); |
| 1095 | } |
| 1096 | |
| 1097 | rcu_read_unlock(); |
| 1098 | } |
| 1099 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1100 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1101 | struct ieee80211_mgmt *mgmt, size_t len, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1102 | struct ieee80211_rx_status *rx_status, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1103 | struct ieee802_11_elems *elems) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1104 | { |
| 1105 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1106 | struct cfg80211_bss *cbss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1107 | struct ieee80211_bss *bss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1108 | struct ieee80211_channel *channel; |
| 1109 | u64 beacon_timestamp, rx_timestamp; |
| 1110 | u32 supp_rates = 0; |
Johannes Berg | 57fbcce | 2016-04-12 15:56:15 +0200 | [diff] [blame] | 1111 | enum nl80211_band band = rx_status->band; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1112 | |
Emmanuel Grumbach | 3afc216 | 2014-03-04 16:50:13 +0200 | [diff] [blame] | 1113 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); |
| 1114 | if (!channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1115 | return; |
| 1116 | |
Janusz.Dziedzic@tieto.com | 8a4988d | 2015-03-09 07:58:15 +0100 | [diff] [blame] | 1117 | ieee80211_update_sta_info(sdata, mgmt, len, rx_status, elems, channel); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1118 | |
Sara Sharon | 4abb52a | 2019-01-16 12:14:41 +0200 | [diff] [blame] | 1119 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1120 | if (!bss) |
| 1121 | return; |
| 1122 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1123 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
| 1124 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 1125 | /* same for beacon and probe response */ |
| 1126 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1127 | |
| 1128 | /* check if we need to merge IBSS */ |
| 1129 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1130 | /* not an IBSS */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1131 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1132 | goto put_bss; |
| 1133 | |
| 1134 | /* different channel */ |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1135 | if (sdata->u.ibss.fixed_channel && |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1136 | sdata->u.ibss.chandef.chan != cbss->channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1137 | goto put_bss; |
| 1138 | |
| 1139 | /* different SSID */ |
| 1140 | if (elems->ssid_len != sdata->u.ibss.ssid_len || |
| 1141 | memcmp(elems->ssid, sdata->u.ibss.ssid, |
| 1142 | sdata->u.ibss.ssid_len)) |
| 1143 | goto put_bss; |
| 1144 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1145 | /* process channel switch */ |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 1146 | if (sdata->vif.csa_active || |
| 1147 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1148 | goto put_bss; |
| 1149 | |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 1150 | /* same BSSID */ |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1151 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 1152 | goto put_bss; |
| 1153 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1154 | /* we use a fixed BSSID */ |
| 1155 | if (sdata->u.ibss.fixed_bssid) |
| 1156 | goto put_bss; |
| 1157 | |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 1158 | if (ieee80211_have_rx_timestamp(rx_status)) { |
| 1159 | /* time when timestamp field was received */ |
| 1160 | rx_timestamp = |
| 1161 | ieee80211_calculate_rx_timestamp(local, rx_status, |
| 1162 | len + FCS_LEN, 24); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1163 | } else { |
| 1164 | /* |
| 1165 | * second best option: get current TSF |
| 1166 | * (will return -1 if not supported) |
| 1167 | */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 1168 | rx_timestamp = drv_get_tsf(local, sdata); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1169 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1170 | |
Emmanuel Grumbach | c6e57b3 | 2018-08-31 11:31:13 +0300 | [diff] [blame] | 1171 | ibss_dbg(sdata, "RX beacon SA=%pM BSSID=%pM TSF=0x%llx\n", |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1172 | mgmt->sa, mgmt->bssid, |
Emmanuel Grumbach | c6e57b3 | 2018-08-31 11:31:13 +0300 | [diff] [blame] | 1173 | (unsigned long long)rx_timestamp); |
| 1174 | ibss_dbg(sdata, "\tBCN=0x%llx diff=%lld @%lu\n", |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1175 | (unsigned long long)beacon_timestamp, |
| 1176 | (unsigned long long)(rx_timestamp - beacon_timestamp), |
| 1177 | jiffies); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1178 | |
| 1179 | if (beacon_timestamp > rx_timestamp) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1180 | ibss_dbg(sdata, |
| 1181 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", |
| 1182 | mgmt->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1183 | ieee80211_sta_join_ibss(sdata, bss); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1184 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1185 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 1186 | supp_rates); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1187 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1188 | } |
| 1189 | |
| 1190 | put_bss: |
| 1191 | ieee80211_rx_bss_put(local, bss); |
| 1192 | } |
| 1193 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1194 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
| 1195 | const u8 *bssid, const u8 *addr, |
| 1196 | u32 supp_rates) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1197 | { |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 1198 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1199 | struct ieee80211_local *local = sdata->local; |
| 1200 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1201 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6cd | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 1202 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1203 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1204 | int band; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1205 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1206 | /* |
| 1207 | * XXX: Consider removing the least recently used entry and |
| 1208 | * allow new one to be added. |
| 1209 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1210 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1211 | net_info_ratelimited("%s: No room for a new IBSS STA entry %pM\n", |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1212 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1213 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1214 | } |
| 1215 | |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 1216 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1217 | return; |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 1218 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1219 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1220 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1221 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1222 | rcu_read_lock(); |
| 1223 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 1224 | if (WARN_ON_ONCE(!chanctx_conf)) { |
| 1225 | rcu_read_unlock(); |
| 1226 | return; |
| 1227 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1228 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1229 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1230 | rcu_read_unlock(); |
| 1231 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1232 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1233 | if (!sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1234 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1235 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1236 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6cd | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 1237 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1238 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1239 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1240 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1241 | spin_lock(&ifibss->incomplete_lock); |
| 1242 | list_add(&sta->list, &ifibss->incomplete_stations); |
| 1243 | spin_unlock(&ifibss->incomplete_lock); |
| 1244 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1245 | } |
| 1246 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1247 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
| 1248 | { |
Johannes Berg | 4b08d1b | 2019-08-30 14:24:51 +0300 | [diff] [blame] | 1249 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1250 | struct ieee80211_local *local = sdata->local; |
| 1251 | struct sta_info *sta, *tmp; |
| 1252 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; |
Johannes Berg | e5a9f8d | 2015-10-16 17:54:47 +0200 | [diff] [blame] | 1253 | unsigned long exp_rsn = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1254 | |
| 1255 | mutex_lock(&local->sta_mtx); |
| 1256 | |
| 1257 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
Johannes Berg | b8da6b6 | 2016-03-31 20:02:07 +0300 | [diff] [blame] | 1258 | unsigned long last_active = ieee80211_sta_last_active(sta); |
| 1259 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1260 | if (sdata != sta->sdata) |
| 1261 | continue; |
| 1262 | |
Johannes Berg | b8da6b6 | 2016-03-31 20:02:07 +0300 | [diff] [blame] | 1263 | if (time_is_before_jiffies(last_active + exp_time) || |
| 1264 | (time_is_before_jiffies(last_active + exp_rsn) && |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1265 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
Johannes Berg | 4b08d1b | 2019-08-30 14:24:51 +0300 | [diff] [blame] | 1266 | u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; |
| 1267 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1268 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", |
| 1269 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? |
| 1270 | "not authorized " : "", sta->sta.addr); |
| 1271 | |
Johannes Berg | 4b08d1b | 2019-08-30 14:24:51 +0300 | [diff] [blame] | 1272 | ieee80211_send_deauth_disassoc(sdata, sta->sta.addr, |
| 1273 | ifibss->bssid, |
| 1274 | IEEE80211_STYPE_DEAUTH, |
| 1275 | WLAN_REASON_DEAUTH_LEAVING, |
| 1276 | true, frame_buf); |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1277 | WARN_ON(__sta_info_destroy(sta)); |
| 1278 | } |
| 1279 | } |
| 1280 | |
| 1281 | mutex_unlock(&local->sta_mtx); |
| 1282 | } |
| 1283 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1284 | /* |
| 1285 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED |
| 1286 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1287 | |
| 1288 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) |
| 1289 | { |
| 1290 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1291 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1292 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1293 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1294 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1295 | mod_timer(&ifibss->timer, |
| 1296 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1297 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1298 | ieee80211_ibss_sta_expire(sdata); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1299 | |
Sujith | 450aae3 | 2009-11-02 12:33:23 +0530 | [diff] [blame] | 1300 | if (time_before(jiffies, ifibss->last_scan_completed + |
| 1301 | IEEE80211_IBSS_MERGE_INTERVAL)) |
| 1302 | return; |
| 1303 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1304 | if (ieee80211_sta_active_ibss(sdata)) |
| 1305 | return; |
| 1306 | |
John W. Linville | c037b83 | 2012-01-30 15:28:11 -0500 | [diff] [blame] | 1307 | if (ifibss->fixed_channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1308 | return; |
| 1309 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1310 | sdata_info(sdata, |
| 1311 | "No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)\n"); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1312 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1313 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1314 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1315 | NULL, 0, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1316 | } |
| 1317 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1318 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1319 | { |
| 1320 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1321 | u8 bssid[ETH_ALEN]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1322 | u16 capability; |
| 1323 | int i; |
| 1324 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1325 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1326 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1327 | if (ifibss->fixed_bssid) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1328 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
| 1329 | } else { |
| 1330 | /* Generate random, not broadcast, locally administered BSSID. Mix in |
| 1331 | * own MAC address to make sure that devices that do not have proper |
| 1332 | * random number generator get different BSSID. */ |
| 1333 | get_random_bytes(bssid, ETH_ALEN); |
| 1334 | for (i = 0; i < ETH_ALEN; i++) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1335 | bssid[i] ^= sdata->vif.addr[i]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1336 | bssid[0] &= ~0x01; |
| 1337 | bssid[0] |= 0x02; |
| 1338 | } |
| 1339 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1340 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1341 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1342 | capability = WLAN_CAPABILITY_IBSS; |
| 1343 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1344 | if (ifibss->privacy) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1345 | capability |= WLAN_CAPABILITY_PRIVACY; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1346 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1347 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 1348 | &ifibss->chandef, ifibss->basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 1349 | capability, 0, true); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1350 | } |
| 1351 | |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1352 | static unsigned ibss_setup_channels(struct wiphy *wiphy, |
| 1353 | struct ieee80211_channel **channels, |
| 1354 | unsigned int channels_max, |
| 1355 | u32 center_freq, u32 width) |
| 1356 | { |
| 1357 | struct ieee80211_channel *chan = NULL; |
| 1358 | unsigned int n_chan = 0; |
| 1359 | u32 start_freq, end_freq, freq; |
| 1360 | |
| 1361 | if (width <= 20) { |
| 1362 | start_freq = center_freq; |
| 1363 | end_freq = center_freq; |
| 1364 | } else { |
| 1365 | start_freq = center_freq - width / 2 + 10; |
| 1366 | end_freq = center_freq + width / 2 - 10; |
| 1367 | } |
| 1368 | |
| 1369 | for (freq = start_freq; freq <= end_freq; freq += 20) { |
| 1370 | chan = ieee80211_get_channel(wiphy, freq); |
| 1371 | if (!chan) |
| 1372 | continue; |
| 1373 | if (n_chan >= channels_max) |
| 1374 | return n_chan; |
| 1375 | |
| 1376 | channels[n_chan] = chan; |
| 1377 | n_chan++; |
| 1378 | } |
| 1379 | |
| 1380 | return n_chan; |
| 1381 | } |
| 1382 | |
| 1383 | static unsigned int |
| 1384 | ieee80211_ibss_setup_scan_channels(struct wiphy *wiphy, |
| 1385 | const struct cfg80211_chan_def *chandef, |
| 1386 | struct ieee80211_channel **channels, |
| 1387 | unsigned int channels_max) |
| 1388 | { |
| 1389 | unsigned int n_chan = 0; |
| 1390 | u32 width, cf1, cf2 = 0; |
| 1391 | |
| 1392 | switch (chandef->width) { |
| 1393 | case NL80211_CHAN_WIDTH_40: |
| 1394 | width = 40; |
| 1395 | break; |
| 1396 | case NL80211_CHAN_WIDTH_80P80: |
| 1397 | cf2 = chandef->center_freq2; |
Gustavo A. R. Silva | fc0561d | 2020-07-07 15:45:48 -0500 | [diff] [blame] | 1398 | fallthrough; |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1399 | case NL80211_CHAN_WIDTH_80: |
| 1400 | width = 80; |
| 1401 | break; |
| 1402 | case NL80211_CHAN_WIDTH_160: |
| 1403 | width = 160; |
| 1404 | break; |
| 1405 | default: |
| 1406 | width = 20; |
| 1407 | break; |
| 1408 | } |
| 1409 | |
| 1410 | cf1 = chandef->center_freq1; |
| 1411 | |
| 1412 | n_chan = ibss_setup_channels(wiphy, channels, channels_max, cf1, width); |
| 1413 | |
| 1414 | if (cf2) |
| 1415 | n_chan += ibss_setup_channels(wiphy, &channels[n_chan], |
| 1416 | channels_max - n_chan, cf2, |
| 1417 | width); |
| 1418 | |
| 1419 | return n_chan; |
| 1420 | } |
| 1421 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1422 | /* |
| 1423 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH |
| 1424 | */ |
| 1425 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1426 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1427 | { |
| 1428 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1429 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1430 | struct cfg80211_bss *cbss; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1431 | struct ieee80211_channel *chan = NULL; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1432 | const u8 *bssid = NULL; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1433 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1434 | int active_ibss; |
| 1435 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1436 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1437 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1438 | active_ibss = ieee80211_sta_active_ibss(sdata); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1439 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1440 | |
| 1441 | if (active_ibss) |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1442 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1443 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1444 | if (ifibss->fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1445 | bssid = ifibss->bssid; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1446 | if (ifibss->fixed_channel) |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1447 | chan = ifibss->chandef.chan; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1448 | if (!is_zero_ether_addr(ifibss->bssid)) |
| 1449 | bssid = ifibss->bssid; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1450 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
| 1451 | ifibss->ssid, ifibss->ssid_len, |
Dedy Lansky | 6eb1813 | 2015-02-08 15:52:03 +0200 | [diff] [blame] | 1452 | IEEE80211_BSS_TYPE_IBSS, |
| 1453 | IEEE80211_PRIVACY(ifibss->privacy)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1454 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1455 | if (cbss) { |
| 1456 | struct ieee80211_bss *bss; |
| 1457 | |
| 1458 | bss = (void *)cbss->priv; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1459 | ibss_dbg(sdata, |
| 1460 | "sta_find_ibss: selected %pM current %pM\n", |
| 1461 | cbss->bssid, ifibss->bssid); |
| 1462 | sdata_info(sdata, |
| 1463 | "Selected IBSS BSSID %pM based on configured SSID\n", |
| 1464 | cbss->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1465 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1466 | ieee80211_sta_join_ibss(sdata, bss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1467 | ieee80211_rx_bss_put(local, bss); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1468 | return; |
Reinette Chatre | d419b9f | 2009-10-19 14:55:37 -0700 | [diff] [blame] | 1469 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1470 | |
Antonio Quartulli | d8eb741 | 2013-08-09 18:58:32 +0200 | [diff] [blame] | 1471 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
| 1472 | * directly and do not waste time scanning |
| 1473 | */ |
| 1474 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { |
| 1475 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", |
| 1476 | bssid); |
| 1477 | ieee80211_sta_create_ibss(sdata); |
| 1478 | return; |
| 1479 | } |
| 1480 | |
| 1481 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1482 | ibss_dbg(sdata, "sta_find_ibss: did not try to join ibss\n"); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1483 | |
| 1484 | /* Selected IBSS not found in current scan results - try to scan */ |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1485 | if (time_after(jiffies, ifibss->last_scan_completed + |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1486 | IEEE80211_SCAN_INTERVAL)) { |
Janusz.Dziedzic@tieto.com | 76bed0f | 2015-03-20 06:37:00 +0100 | [diff] [blame] | 1487 | struct ieee80211_channel *channels[8]; |
| 1488 | unsigned int num; |
| 1489 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1490 | sdata_info(sdata, "Trigger new scan to find an IBSS to join\n"); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1491 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1492 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Sara Sharon | d321cd0 | 2016-01-25 15:46:35 +0200 | [diff] [blame] | 1493 | |
| 1494 | if (ifibss->fixed_channel) { |
| 1495 | num = ieee80211_ibss_setup_scan_channels(local->hw.wiphy, |
| 1496 | &ifibss->chandef, |
| 1497 | channels, |
| 1498 | ARRAY_SIZE(channels)); |
| 1499 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
| 1500 | ifibss->ssid_len, channels, |
| 1501 | num, scan_width); |
| 1502 | } else { |
| 1503 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
| 1504 | ifibss->ssid_len, NULL, |
| 1505 | 0, scan_width); |
| 1506 | } |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1507 | } else { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1508 | int interval = IEEE80211_SCAN_INTERVAL; |
| 1509 | |
| 1510 | if (time_after(jiffies, ifibss->ibss_join_req + |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1511 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
| 1512 | ieee80211_sta_create_ibss(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1513 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1514 | mod_timer(&ifibss->timer, |
| 1515 | round_jiffies(jiffies + interval)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1516 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | c269a203 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1520 | struct sk_buff *req) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1521 | { |
Johannes Berg | c269a203 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1522 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1523 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1524 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | c269a203 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1525 | int tx_last_beacon, len = req->len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1526 | struct sk_buff *skb; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1527 | struct beacon_data *presp; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1528 | u8 *pos, *end; |
| 1529 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1530 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1531 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1532 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1533 | lockdep_is_held(&sdata->wdev.mtx)); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1534 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1535 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1536 | len < 24 + 2 || !presp) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1537 | return; |
| 1538 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1539 | tx_last_beacon = drv_tx_last_beacon(local); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1540 | |
Emmanuel Grumbach | c6e57b3 | 2018-08-31 11:31:13 +0300 | [diff] [blame] | 1541 | ibss_dbg(sdata, "RX ProbeReq SA=%pM DA=%pM\n", mgmt->sa, mgmt->da); |
| 1542 | ibss_dbg(sdata, "\tBSSID=%pM (tx_last_beacon=%d)\n", |
| 1543 | mgmt->bssid, tx_last_beacon); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1544 | |
Felix Fietkau | 1ed7648 | 2011-03-24 19:46:18 +0100 | [diff] [blame] | 1545 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1546 | return; |
| 1547 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1548 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
Felix Fietkau | 888d04d | 2012-03-01 15:22:09 +0100 | [diff] [blame] | 1549 | !is_broadcast_ether_addr(mgmt->bssid)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1550 | return; |
| 1551 | |
| 1552 | end = ((u8 *) mgmt) + len; |
| 1553 | pos = mgmt->u.probe_req.variable; |
| 1554 | if (pos[0] != WLAN_EID_SSID || |
| 1555 | pos + 2 + pos[1] > end) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1556 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
| 1557 | mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1558 | return; |
| 1559 | } |
| 1560 | if (pos[1] != 0 && |
| 1561 | (pos[1] != ifibss->ssid_len || |
Benoit Papillault | 0da780c | 2010-02-05 01:21:03 +0100 | [diff] [blame] | 1562 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1563 | /* Ignore ProbeReq for foreign SSID */ |
| 1564 | return; |
| 1565 | } |
| 1566 | |
| 1567 | /* Reply with ProbeResp */ |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1568 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1569 | if (!skb) |
| 1570 | return; |
| 1571 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1572 | skb_reserve(skb, local->tx_headroom); |
Johannes Berg | 59ae1d1 | 2017-06-16 14:29:20 +0200 | [diff] [blame] | 1573 | skb_put_data(skb, presp->head, presp->head_len); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1574 | |
| 1575 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); |
| 1576 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 1577 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
Simon Wunderlich | 691eb61 | 2014-01-24 23:48:29 +0100 | [diff] [blame] | 1578 | |
| 1579 | /* avoid excessive retries for probe request to wildcard SSIDs */ |
| 1580 | if (pos[1] == 0) |
| 1581 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; |
| 1582 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 1583 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1584 | } |
| 1585 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1586 | static |
| 1587 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, |
| 1588 | struct ieee80211_mgmt *mgmt, size_t len, |
| 1589 | struct ieee80211_rx_status *rx_status) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1590 | { |
| 1591 | size_t baselen; |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 1592 | struct ieee802_11_elems *elems; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1593 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1594 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
| 1595 | offsetof(typeof(mgmt->u.beacon), variable)); |
| 1596 | |
| 1597 | /* |
| 1598 | * either beacon or probe_resp but the variable field is at the |
| 1599 | * same offset |
| 1600 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1601 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 1602 | if (baselen > len) |
| 1603 | return; |
| 1604 | |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 1605 | elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, |
| 1606 | len - baselen, false, |
| 1607 | mgmt->bssid, NULL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1608 | |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 1609 | if (elems) { |
| 1610 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, elems); |
| 1611 | kfree(elems); |
| 1612 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1613 | } |
| 1614 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1615 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 1616 | struct sk_buff *skb) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1617 | { |
| 1618 | struct ieee80211_rx_status *rx_status; |
| 1619 | struct ieee80211_mgmt *mgmt; |
| 1620 | u16 fc; |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 1621 | struct ieee802_11_elems *elems; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1622 | int ies_len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1623 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 1624 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1625 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 1626 | fc = le16_to_cpu(mgmt->frame_control); |
| 1627 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1628 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1629 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1630 | if (!sdata->u.ibss.ssid_len) |
| 1631 | goto mgmt_out; /* not ready to merge yet */ |
| 1632 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1633 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 1634 | case IEEE80211_STYPE_PROBE_REQ: |
Johannes Berg | c269a203 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1635 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1636 | break; |
| 1637 | case IEEE80211_STYPE_PROBE_RESP: |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1638 | case IEEE80211_STYPE_BEACON: |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1639 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
| 1640 | rx_status); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1641 | break; |
| 1642 | case IEEE80211_STYPE_AUTH: |
| 1643 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); |
| 1644 | break; |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 1645 | case IEEE80211_STYPE_DEAUTH: |
| 1646 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); |
| 1647 | break; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1648 | case IEEE80211_STYPE_ACTION: |
| 1649 | switch (mgmt->u.action.category) { |
| 1650 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
| 1651 | ies_len = skb->len - |
| 1652 | offsetof(struct ieee80211_mgmt, |
| 1653 | u.action.u.chan_switch.variable); |
| 1654 | |
| 1655 | if (ies_len < 0) |
| 1656 | break; |
| 1657 | |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 1658 | elems = ieee802_11_parse_elems( |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1659 | mgmt->u.action.u.chan_switch.variable, |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 1660 | ies_len, true, mgmt->bssid, NULL); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1661 | |
Johannes Berg | 8223ac1 | 2021-10-01 21:11:08 +0200 | [diff] [blame] | 1662 | if (elems && !elems->parse_error) |
| 1663 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, |
| 1664 | skb->len, |
| 1665 | rx_status, |
| 1666 | elems); |
Johannes Berg | 5d24828 | 2021-09-20 15:40:10 +0200 | [diff] [blame] | 1667 | kfree(elems); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1668 | break; |
| 1669 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1670 | } |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1671 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1672 | mgmt_out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1673 | sdata_unlock(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1674 | } |
| 1675 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1676 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1677 | { |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1678 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1679 | struct sta_info *sta; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1680 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1681 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1682 | |
| 1683 | /* |
| 1684 | * Work could be scheduled after scan or similar |
| 1685 | * when we aren't even joined (or trying) with a |
| 1686 | * network. |
| 1687 | */ |
| 1688 | if (!ifibss->ssid_len) |
| 1689 | goto out; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1690 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1691 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1692 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 1693 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 1694 | struct sta_info, list); |
| 1695 | list_del(&sta->list); |
| 1696 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1697 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 1698 | ieee80211_ibss_finish_sta(sta); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1699 | rcu_read_unlock(); |
| 1700 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1701 | } |
| 1702 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1703 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1704 | switch (ifibss->state) { |
| 1705 | case IEEE80211_IBSS_MLME_SEARCH: |
| 1706 | ieee80211_sta_find_ibss(sdata); |
| 1707 | break; |
| 1708 | case IEEE80211_IBSS_MLME_JOINED: |
| 1709 | ieee80211_sta_merge_ibss(sdata); |
| 1710 | break; |
| 1711 | default: |
| 1712 | WARN_ON(1); |
| 1713 | break; |
| 1714 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1715 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1716 | out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1717 | sdata_unlock(sdata); |
Johannes Berg | 3a4d4aa | 2010-05-26 16:41:40 +0200 | [diff] [blame] | 1718 | } |
| 1719 | |
Kees Cook | 34f11cd3 | 2017-10-16 16:35:49 -0700 | [diff] [blame] | 1720 | static void ieee80211_ibss_timer(struct timer_list *t) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1721 | { |
| 1722 | struct ieee80211_sub_if_data *sdata = |
Kees Cook | 34f11cd3 | 2017-10-16 16:35:49 -0700 | [diff] [blame] | 1723 | from_timer(sdata, t, u.ibss.timer); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1724 | |
Stanislaw Gruszka | a618294 | 2013-02-28 10:55:28 +0100 | [diff] [blame] | 1725 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1726 | } |
| 1727 | |
| 1728 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
| 1729 | { |
| 1730 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1731 | |
Kees Cook | 34f11cd3 | 2017-10-16 16:35:49 -0700 | [diff] [blame] | 1732 | timer_setup(&ifibss->timer, ieee80211_ibss_timer, 0); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1733 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
| 1734 | spin_lock_init(&ifibss->incomplete_lock); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1735 | INIT_WORK(&ifibss->csa_connection_drop_work, |
| 1736 | ieee80211_csa_connection_drop_work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1737 | } |
| 1738 | |
| 1739 | /* scan finished notification */ |
| 1740 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) |
| 1741 | { |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1742 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1743 | |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1744 | mutex_lock(&local->iflist_mtx); |
| 1745 | list_for_each_entry(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b66 | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 1746 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1747 | continue; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1748 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 1749 | continue; |
| 1750 | sdata->u.ibss.last_scan_completed = jiffies; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1751 | } |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1752 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1753 | } |
| 1754 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1755 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
| 1756 | struct cfg80211_ibss_params *params) |
| 1757 | { |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1758 | u32 changed = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1759 | u32 rate_flags; |
| 1760 | struct ieee80211_supported_band *sband; |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1761 | enum ieee80211_chanctx_mode chanmode; |
| 1762 | struct ieee80211_local *local = sdata->local; |
| 1763 | int radar_detect_width = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1764 | int i; |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1765 | int ret; |
| 1766 | |
Thomas Pedersen | b6011960 | 2020-04-01 18:18:04 -0700 | [diff] [blame] | 1767 | if (params->chandef.chan->freq_offset) { |
| 1768 | /* this may work, but is untested */ |
| 1769 | return -EOPNOTSUPP; |
| 1770 | } |
| 1771 | |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1772 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, |
| 1773 | ¶ms->chandef, |
| 1774 | sdata->wdev.iftype); |
| 1775 | if (ret < 0) |
| 1776 | return ret; |
| 1777 | |
| 1778 | if (ret > 0) { |
| 1779 | if (!params->userspace_handles_dfs) |
| 1780 | return -EINVAL; |
| 1781 | radar_detect_width = BIT(params->chandef.width); |
| 1782 | } |
| 1783 | |
| 1784 | chanmode = (params->channel_fixed && !ret) ? |
| 1785 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; |
| 1786 | |
| 1787 | mutex_lock(&local->chanctx_mtx); |
| 1788 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, |
| 1789 | radar_detect_width); |
| 1790 | mutex_unlock(&local->chanctx_mtx); |
| 1791 | if (ret < 0) |
| 1792 | return ret; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1793 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1794 | if (params->bssid) { |
| 1795 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); |
| 1796 | sdata->u.ibss.fixed_bssid = true; |
| 1797 | } else |
| 1798 | sdata->u.ibss.fixed_bssid = false; |
| 1799 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1800 | sdata->u.ibss.privacy = params->privacy; |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 1801 | sdata->u.ibss.control_port = params->control_port; |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 1802 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 1803 | sdata->u.ibss.basic_rates = params->basic_rates; |
Krzysztof HaĆasa | c7d37a6 | 2014-05-26 14:14:46 +0200 | [diff] [blame] | 1804 | sdata->u.ibss.last_scan_completed = jiffies; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1805 | |
| 1806 | /* fix basic_rates if channel does not support these rates */ |
| 1807 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1808 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1809 | for (i = 0; i < sband->n_bitrates; i++) { |
| 1810 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 1811 | sdata->u.ibss.basic_rates &= ~BIT(i); |
| 1812 | } |
Felix Fietkau | dd5b4cc | 2010-11-22 20:58:24 +0100 | [diff] [blame] | 1813 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
| 1814 | sizeof(params->mcast_rate)); |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1815 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1816 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
| 1817 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1818 | sdata->u.ibss.chandef = params->chandef; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1819 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
| 1820 | |
| 1821 | if (params->ie) { |
| 1822 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, |
| 1823 | GFP_KERNEL); |
| 1824 | if (sdata->u.ibss.ie) |
| 1825 | sdata->u.ibss.ie_len = params->ie_len; |
| 1826 | } |
| 1827 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1828 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
| 1829 | sdata->u.ibss.ibss_join_req = jiffies; |
| 1830 | |
Antonio Quartulli | badecb0 | 2012-10-26 18:54:25 +0200 | [diff] [blame] | 1831 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1832 | sdata->u.ibss.ssid_len = params->ssid_len; |
| 1833 | |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1834 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
| 1835 | sizeof(sdata->u.ibss.ht_capa)); |
| 1836 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, |
| 1837 | sizeof(sdata->u.ibss.ht_capa_mask)); |
| 1838 | |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1839 | /* |
| 1840 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is |
| 1841 | * reserved, but an HT STA shall protect HT transmissions as though |
| 1842 | * the HT Protection field were set to non-HT mixed mode. |
| 1843 | * |
| 1844 | * In an IBSS, the RIFS Mode field of the HT Operation element is |
| 1845 | * also reserved, but an HT STA shall operate as though this field |
| 1846 | * were set to 1. |
| 1847 | */ |
| 1848 | |
| 1849 | sdata->vif.bss_conf.ht_operation_mode |= |
| 1850 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
| 1851 | | IEEE80211_HT_PARAM_RIFS_MODE; |
| 1852 | |
Pradeep Kumar Chitrapu | dcbe73c | 2018-03-22 12:18:03 -0700 | [diff] [blame] | 1853 | changed |= BSS_CHANGED_HT | BSS_CHANGED_MCAST_RATE; |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1854 | ieee80211_bss_info_change_notify(sdata, changed); |
| 1855 | |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 1856 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1857 | sdata->needed_rx_chains = local->rx_chains; |
Denis Kenzior | 018f6fb | 2018-03-26 12:52:51 -0500 | [diff] [blame] | 1858 | sdata->control_port_over_nl80211 = params->control_port_over_nl80211; |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 1859 | |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1860 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1861 | |
| 1862 | return 0; |
| 1863 | } |
| 1864 | |
| 1865 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) |
| 1866 | { |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1867 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1868 | |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 1869 | ieee80211_ibss_disconnect(sdata); |
Simon Wunderlich | b78a493 | 2012-11-13 18:43:03 +0100 | [diff] [blame] | 1870 | ifibss->ssid_len = 0; |
Joe Perches | c84a67a | 2015-03-02 19:54:57 -0800 | [diff] [blame] | 1871 | eth_zero_addr(ifibss->bssid); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1872 | |
| 1873 | /* remove beacon */ |
| 1874 | kfree(sdata->u.ibss.ie); |
Markus Theil | 3bd801b | 2021-02-13 14:36:53 +0100 | [diff] [blame] | 1875 | sdata->u.ibss.ie = NULL; |
| 1876 | sdata->u.ibss.ie_len = 0; |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1877 | |
| 1878 | /* on the next join, re-program HT parameters */ |
| 1879 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); |
| 1880 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); |
| 1881 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1882 | synchronize_rcu(); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1883 | |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 1884 | skb_queue_purge(&sdata->skb_queue); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1885 | |
Johannes Berg | bc05d19 | 2010-07-21 10:52:40 +0200 | [diff] [blame] | 1886 | del_timer_sync(&sdata->u.ibss.timer); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1887 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1888 | return 0; |
| 1889 | } |