Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1 | /* |
| 2 | * IBSS mode implementation |
| 3 | * Copyright 2003-2008, Jouni Malinen <j@w1.fi> |
| 4 | * Copyright 2004, Instant802 Networks, Inc. |
| 5 | * Copyright 2005, Devicescape Software, Inc. |
| 6 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 7 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> |
| 8 | * Copyright 2009, Johannes Berg <johannes@sipsolutions.net> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 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) + |
| 67 | ifibss->ie_len; |
| 68 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); |
| 69 | if (!presp) |
| 70 | return NULL; |
| 71 | |
| 72 | presp->head = (void *)(presp + 1); |
| 73 | |
| 74 | mgmt = (void *) presp->head; |
| 75 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 76 | IEEE80211_STYPE_PROBE_RESP); |
| 77 | eth_broadcast_addr(mgmt->da); |
| 78 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 79 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
| 80 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
| 81 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
| 82 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
| 83 | |
| 84 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
| 85 | |
| 86 | *pos++ = WLAN_EID_SSID; |
| 87 | *pos++ = ifibss->ssid_len; |
| 88 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); |
| 89 | pos += ifibss->ssid_len; |
| 90 | |
| 91 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
| 92 | rate_flags = ieee80211_chandef_rate_flags(chandef); |
| 93 | shift = ieee80211_chandef_get_shift(chandef); |
| 94 | rates_n = 0; |
| 95 | if (have_higher_than_11mbit) |
| 96 | *have_higher_than_11mbit = false; |
| 97 | |
| 98 | for (i = 0; i < sband->n_bitrates; i++) { |
| 99 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 100 | continue; |
| 101 | if (sband->bitrates[i].bitrate > 110 && |
| 102 | have_higher_than_11mbit) |
| 103 | *have_higher_than_11mbit = true; |
| 104 | |
| 105 | rates |= BIT(i); |
| 106 | rates_n++; |
| 107 | } |
| 108 | |
| 109 | *pos++ = WLAN_EID_SUPP_RATES; |
| 110 | *pos++ = min_t(int, 8, rates_n); |
| 111 | for (ri = 0; ri < sband->n_bitrates; ri++) { |
| 112 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 113 | 5 * (1 << shift)); |
| 114 | u8 basic = 0; |
| 115 | if (!(rates & BIT(ri))) |
| 116 | continue; |
| 117 | |
| 118 | if (basic_rates & BIT(ri)) |
| 119 | basic = 0x80; |
| 120 | *pos++ = basic | (u8) rate; |
| 121 | if (++rates_added == 8) { |
| 122 | ri++; /* continue at next rate for EXT_SUPP_RATES */ |
| 123 | break; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | if (sband->band == IEEE80211_BAND_2GHZ) { |
| 128 | *pos++ = WLAN_EID_DS_PARAMS; |
| 129 | *pos++ = 1; |
| 130 | *pos++ = ieee80211_frequency_to_channel( |
| 131 | chandef->chan->center_freq); |
| 132 | } |
| 133 | |
| 134 | *pos++ = WLAN_EID_IBSS_PARAMS; |
| 135 | *pos++ = 2; |
| 136 | /* FIX: set ATIM window based on scan results */ |
| 137 | *pos++ = 0; |
| 138 | *pos++ = 0; |
| 139 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 140 | if (csa_settings) { |
| 141 | *pos++ = WLAN_EID_CHANNEL_SWITCH; |
| 142 | *pos++ = 3; |
| 143 | *pos++ = csa_settings->block_tx ? 1 : 0; |
| 144 | *pos++ = ieee80211_frequency_to_channel( |
| 145 | csa_settings->chandef.chan->center_freq); |
Michal Kazior | af296bd | 2014-06-05 14:21:36 +0200 | [diff] [blame] | 146 | presp->csa_counter_offsets[0] = (pos - presp->head); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 147 | *pos++ = csa_settings->count; |
| 148 | } |
| 149 | |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 150 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
| 151 | if (rates_n > 8) { |
| 152 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 153 | *pos++ = rates_n - 8; |
| 154 | for (; ri < sband->n_bitrates; ri++) { |
| 155 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 156 | 5 * (1 << shift)); |
| 157 | u8 basic = 0; |
| 158 | if (!(rates & BIT(ri))) |
| 159 | continue; |
| 160 | |
| 161 | if (basic_rates & BIT(ri)) |
| 162 | basic = 0x80; |
| 163 | *pos++ = basic | (u8) rate; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | if (ifibss->ie_len) { |
| 168 | memcpy(pos, ifibss->ie, ifibss->ie_len); |
| 169 | pos += ifibss->ie_len; |
| 170 | } |
| 171 | |
| 172 | /* add HT capability and information IEs */ |
| 173 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
| 174 | chandef->width != NL80211_CHAN_WIDTH_5 && |
| 175 | chandef->width != NL80211_CHAN_WIDTH_10 && |
| 176 | sband->ht_cap.ht_supported) { |
| 177 | struct ieee80211_sta_ht_cap ht_cap; |
| 178 | |
| 179 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
| 180 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
| 181 | |
| 182 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); |
| 183 | /* |
| 184 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection |
| 185 | * field and RIFS Mode are reserved in IBSS mode, therefore |
| 186 | * keep them at 0 |
| 187 | */ |
| 188 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
| 189 | chandef, 0); |
| 190 | } |
| 191 | |
Arik Nemtsov | 40b861a | 2014-07-17 17:14:23 +0300 | [diff] [blame] | 192 | if (local->hw.queues >= IEEE80211_NUM_ACS) |
| 193 | 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] | 194 | |
| 195 | presp->head_len = pos - presp->head; |
| 196 | if (WARN_ON(presp->head_len > frame_len)) |
| 197 | goto error; |
| 198 | |
| 199 | return presp; |
| 200 | error: |
| 201 | kfree(presp); |
| 202 | return NULL; |
| 203 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 204 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 205 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 206 | const u8 *bssid, const int beacon_int, |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 207 | struct cfg80211_chan_def *req_chandef, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 208 | const u32 basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 209 | const u16 capability, u64 tsf, |
| 210 | bool creator) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 211 | { |
| 212 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 213 | struct ieee80211_local *local = sdata->local; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 214 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | f446d10 | 2009-10-28 15:12:32 +0100 | [diff] [blame] | 215 | struct cfg80211_bss *bss; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 216 | u32 bss_change; |
Johannes Berg | 683b6d3 | 2012-11-08 21:25:48 +0100 | [diff] [blame] | 217 | struct cfg80211_chan_def chandef; |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 218 | struct ieee80211_channel *chan; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 219 | struct beacon_data *presp; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 220 | enum nl80211_bss_scan_width scan_width; |
| 221 | bool have_higher_than_11mbit; |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 222 | bool radar_required; |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 223 | int err; |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 224 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 225 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 226 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 227 | /* Reset own TSF to allow time synchronization work. */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 228 | drv_reset_tsf(local, sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 229 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 230 | if (!ether_addr_equal(ifibss->bssid, bssid)) |
Johannes Berg | b998e8b | 2012-12-13 23:07:46 +0100 | [diff] [blame] | 231 | sta_info_flush(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 232 | |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 233 | /* if merging, indicate to driver that we leave the old IBSS */ |
| 234 | if (sdata->vif.bss_conf.ibss_joined) { |
| 235 | sdata->vif.bss_conf.ibss_joined = false; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 236 | sdata->vif.bss_conf.ibss_creator = false; |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 237 | sdata->vif.bss_conf.enable_beacon = false; |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 238 | netif_carrier_off(sdata->dev); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 239 | ieee80211_bss_info_change_notify(sdata, |
| 240 | BSS_CHANGED_IBSS | |
| 241 | BSS_CHANGED_BEACON_ENABLED); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 242 | drv_leave_ibss(local, sdata); |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 243 | } |
| 244 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 245 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 246 | lockdep_is_held(&sdata->wdev.mtx)); |
Monam Agarwal | 0c2bef46 | 2014-03-24 00:51:43 +0530 | [diff] [blame] | 247 | RCU_INIT_POINTER(ifibss->presp, NULL); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 248 | if (presp) |
| 249 | kfree_rcu(presp, rcu_head); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 250 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 251 | sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 252 | |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 253 | /* make a copy of the chandef, it could be modified below. */ |
| 254 | chandef = *req_chandef; |
| 255 | chan = chandef.chan; |
Ilan Peer | 174e0cd | 2014-02-23 09:13:01 +0200 | [diff] [blame] | 256 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
| 257 | NL80211_IFTYPE_ADHOC)) { |
Simon Wunderlich | 4b42aab | 2013-07-08 16:55:57 +0200 | [diff] [blame] | 258 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
| 259 | chandef.width == NL80211_CHAN_WIDTH_10 || |
| 260 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
| 261 | chandef.width == NL80211_CHAN_WIDTH_20) { |
| 262 | sdata_info(sdata, |
| 263 | "Failed to join IBSS, beacons forbidden\n"); |
| 264 | return; |
| 265 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 266 | chandef.width = NL80211_CHAN_WIDTH_20; |
| 267 | chandef.center_freq1 = chan->center_freq; |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 268 | /* check again for downgraded chandef */ |
Ilan Peer | 174e0cd | 2014-02-23 09:13:01 +0200 | [diff] [blame] | 269 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, |
| 270 | NL80211_IFTYPE_ADHOC)) { |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 271 | sdata_info(sdata, |
| 272 | "Failed to join IBSS, beacons forbidden\n"); |
| 273 | return; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 278 | &chandef, NL80211_IFTYPE_ADHOC); |
Luciano Coelho | 6658ab8 | 2014-02-20 16:36:23 +0200 | [diff] [blame] | 279 | if (err < 0) { |
| 280 | sdata_info(sdata, |
| 281 | "Failed to join IBSS, invalid chandef\n"); |
| 282 | return; |
| 283 | } |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 284 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
| 285 | sdata_info(sdata, |
| 286 | "Failed to join IBSS, DFS channel without control program\n"); |
| 287 | return; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 288 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 289 | |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 290 | radar_required = err; |
| 291 | |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 292 | mutex_lock(&local->mtx); |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 293 | if (ieee80211_vif_use_channel(sdata, &chandef, |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 294 | ifibss->fixed_channel ? |
| 295 | IEEE80211_CHANCTX_SHARED : |
| 296 | IEEE80211_CHANCTX_EXCLUSIVE)) { |
| 297 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 298 | mutex_unlock(&local->mtx); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 299 | return; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 300 | } |
Michal Kazior | cc901de | 2014-01-29 07:56:20 +0100 | [diff] [blame] | 301 | sdata->radar_required = radar_required; |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 302 | mutex_unlock(&local->mtx); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 303 | |
| 304 | memcpy(ifibss->bssid, bssid, ETH_ALEN); |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 305 | |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 306 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
| 307 | capability, tsf, &chandef, |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 308 | &have_higher_than_11mbit, NULL); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 309 | if (!presp) |
| 310 | return; |
| 311 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 312 | rcu_assign_pointer(ifibss->presp, presp); |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame] | 313 | mgmt = (void *)presp->head; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 314 | |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 315 | sdata->vif.bss_conf.enable_beacon = true; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 316 | sdata->vif.bss_conf.beacon_int = beacon_int; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 317 | sdata->vif.bss_conf.basic_rates = basic_rates; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 318 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
| 319 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 320 | bss_change = BSS_CHANGED_BEACON_INT; |
| 321 | bss_change |= ieee80211_reset_erp_info(sdata); |
| 322 | bss_change |= BSS_CHANGED_BSSID; |
| 323 | bss_change |= BSS_CHANGED_BEACON; |
| 324 | bss_change |= BSS_CHANGED_BEACON_ENABLED; |
Teemu Paasikivi | 392cfdb | 2010-06-14 12:55:32 +0300 | [diff] [blame] | 325 | bss_change |= BSS_CHANGED_BASIC_RATES; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 326 | bss_change |= BSS_CHANGED_HT; |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 327 | bss_change |= BSS_CHANGED_IBSS; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 328 | bss_change |= BSS_CHANGED_SSID; |
Simon Wunderlich | 2f91a96 | 2012-12-03 22:21:30 +0100 | [diff] [blame] | 329 | |
| 330 | /* |
| 331 | * In 5 GHz/802.11a, we can always use short slot time. |
| 332 | * (IEEE 802.11-2012 18.3.8.7) |
| 333 | * |
| 334 | * In 2.4GHz, we must always use long slots in IBSS for compatibility |
| 335 | * reasons. |
| 336 | * (IEEE 802.11-2012 19.4.5) |
| 337 | * |
| 338 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) |
| 339 | */ |
| 340 | sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; |
| 341 | bss_change |= BSS_CHANGED_ERP_SLOT; |
| 342 | |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 343 | /* cf. IEEE 802.11 9.2.12 */ |
| 344 | if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit) |
| 345 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| 346 | else |
| 347 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| 348 | |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 349 | ieee80211_set_wmm_default(sdata, true); |
| 350 | |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 351 | sdata->vif.bss_conf.ibss_joined = true; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 352 | sdata->vif.bss_conf.ibss_creator = creator; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 353 | |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 354 | err = drv_join_ibss(local, sdata); |
| 355 | if (err) { |
| 356 | sdata->vif.bss_conf.ibss_joined = false; |
| 357 | sdata->vif.bss_conf.ibss_creator = false; |
| 358 | sdata->vif.bss_conf.enable_beacon = false; |
| 359 | sdata->vif.bss_conf.ssid_len = 0; |
| 360 | RCU_INIT_POINTER(ifibss->presp, NULL); |
| 361 | kfree_rcu(presp, rcu_head); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 362 | mutex_lock(&local->mtx); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 363 | ieee80211_vif_release_channel(sdata); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 364 | mutex_unlock(&local->mtx); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 365 | sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", |
| 366 | err); |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | ieee80211_bss_info_change_notify(sdata, bss_change); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 371 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 372 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 373 | mod_timer(&ifibss->timer, |
| 374 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 375 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 376 | scan_width = cfg80211_chandef_to_scan_width(&chandef); |
| 377 | bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan, |
| 378 | scan_width, mgmt, |
| 379 | presp->head_len, 0, GFP_KERNEL); |
Johannes Berg | 5b112d3 | 2013-02-01 01:49:58 +0100 | [diff] [blame] | 380 | cfg80211_put_bss(local->hw.wiphy, bss); |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 381 | netif_carrier_on(sdata->dev); |
Antonio Quartulli | fe94f3a | 2014-01-29 17:53:43 +0100 | [diff] [blame] | 382 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, chan, GFP_KERNEL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 383 | } |
| 384 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 385 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 386 | struct ieee80211_bss *bss) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 387 | { |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 388 | struct cfg80211_bss *cbss = |
| 389 | container_of((void *)bss, struct cfg80211_bss, priv); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 390 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 391 | struct cfg80211_chan_def chandef; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 392 | u32 basic_rates; |
| 393 | int i, j; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 394 | u16 beacon_int = cbss->beacon_interval; |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 395 | const struct cfg80211_bss_ies *ies; |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 396 | enum nl80211_channel_type chan_type; |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 397 | u64 tsf; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 398 | u32 rate_flags; |
| 399 | int shift; |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 400 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 401 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 402 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 403 | if (beacon_int < 10) |
| 404 | beacon_int = 10; |
| 405 | |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 406 | switch (sdata->u.ibss.chandef.width) { |
| 407 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 408 | case NL80211_CHAN_WIDTH_20: |
| 409 | case NL80211_CHAN_WIDTH_40: |
| 410 | chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef); |
| 411 | cfg80211_chandef_create(&chandef, cbss->channel, chan_type); |
| 412 | break; |
| 413 | case NL80211_CHAN_WIDTH_5: |
| 414 | case NL80211_CHAN_WIDTH_10: |
| 415 | cfg80211_chandef_create(&chandef, cbss->channel, |
| 416 | NL80211_CHAN_WIDTH_20_NOHT); |
| 417 | chandef.width = sdata->u.ibss.chandef.width; |
| 418 | break; |
| 419 | default: |
| 420 | /* fall back to 20 MHz for unsupported modes */ |
| 421 | cfg80211_chandef_create(&chandef, cbss->channel, |
| 422 | NL80211_CHAN_WIDTH_20_NOHT); |
| 423 | break; |
| 424 | } |
| 425 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 426 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 427 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
| 428 | shift = ieee80211_vif_get_shift(&sdata->vif); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 429 | |
| 430 | basic_rates = 0; |
| 431 | |
| 432 | for (i = 0; i < bss->supp_rates_len; i++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 433 | int rate = bss->supp_rates[i] & 0x7f; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 434 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
| 435 | |
| 436 | for (j = 0; j < sband->n_bitrates; j++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 437 | int brate; |
| 438 | if ((rate_flags & sband->bitrates[j].flags) |
| 439 | != rate_flags) |
| 440 | continue; |
| 441 | |
| 442 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, |
| 443 | 5 * (1 << shift)); |
| 444 | if (brate == rate) { |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 445 | if (is_basic) |
| 446 | basic_rates |= BIT(j); |
| 447 | break; |
| 448 | } |
| 449 | } |
| 450 | } |
| 451 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 452 | rcu_read_lock(); |
| 453 | ies = rcu_dereference(cbss->ies); |
| 454 | tsf = ies->tsf; |
| 455 | rcu_read_unlock(); |
| 456 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 457 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 458 | beacon_int, |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 459 | &chandef, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 460 | basic_rates, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 461 | cbss->capability, |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 462 | tsf, false); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 463 | } |
| 464 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 465 | int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, |
| 466 | struct cfg80211_csa_settings *csa_settings) |
| 467 | { |
| 468 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 469 | struct beacon_data *presp, *old_presp; |
| 470 | struct cfg80211_bss *cbss; |
| 471 | const struct cfg80211_bss_ies *ies; |
| 472 | u16 capability; |
| 473 | u64 tsf; |
| 474 | int ret = 0; |
| 475 | |
| 476 | sdata_assert_lock(sdata); |
| 477 | |
| 478 | capability = WLAN_CAPABILITY_IBSS; |
| 479 | |
| 480 | if (ifibss->privacy) |
| 481 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 482 | |
| 483 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, |
| 484 | ifibss->bssid, ifibss->ssid, |
| 485 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | |
| 486 | WLAN_CAPABILITY_PRIVACY, |
| 487 | capability); |
| 488 | |
| 489 | if (WARN_ON(!cbss)) { |
| 490 | ret = -EINVAL; |
| 491 | goto out; |
| 492 | } |
| 493 | |
| 494 | rcu_read_lock(); |
| 495 | ies = rcu_dereference(cbss->ies); |
| 496 | tsf = ies->tsf; |
| 497 | rcu_read_unlock(); |
| 498 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
| 499 | |
| 500 | old_presp = rcu_dereference_protected(ifibss->presp, |
| 501 | lockdep_is_held(&sdata->wdev.mtx)); |
| 502 | |
| 503 | presp = ieee80211_ibss_build_presp(sdata, |
| 504 | sdata->vif.bss_conf.beacon_int, |
| 505 | sdata->vif.bss_conf.basic_rates, |
| 506 | capability, tsf, &ifibss->chandef, |
| 507 | NULL, csa_settings); |
| 508 | if (!presp) { |
| 509 | ret = -ENOMEM; |
| 510 | goto out; |
| 511 | } |
| 512 | |
| 513 | rcu_assign_pointer(ifibss->presp, presp); |
| 514 | if (old_presp) |
| 515 | kfree_rcu(old_presp, rcu_head); |
| 516 | |
Luciano Coelho | dddd586 | 2013-12-13 21:13:51 +0200 | [diff] [blame] | 517 | return BSS_CHANGED_BEACON; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 518 | out: |
| 519 | return ret; |
| 520 | } |
| 521 | |
| 522 | int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata) |
| 523 | { |
| 524 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 525 | struct cfg80211_bss *cbss; |
Michal Kazior | faf046e | 2014-01-29 07:56:17 +0100 | [diff] [blame] | 526 | int err, changed = 0; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 527 | u16 capability; |
| 528 | |
Simon Wunderlich | bafdc61 | 2013-12-05 19:54:43 +0100 | [diff] [blame] | 529 | sdata_assert_lock(sdata); |
| 530 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 531 | /* update cfg80211 bss information with the new channel */ |
| 532 | if (!is_zero_ether_addr(ifibss->bssid)) { |
| 533 | capability = WLAN_CAPABILITY_IBSS; |
| 534 | |
| 535 | if (ifibss->privacy) |
| 536 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 537 | |
| 538 | cbss = cfg80211_get_bss(sdata->local->hw.wiphy, |
| 539 | ifibss->chandef.chan, |
| 540 | ifibss->bssid, ifibss->ssid, |
| 541 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | |
| 542 | WLAN_CAPABILITY_PRIVACY, |
| 543 | capability); |
| 544 | /* XXX: should not really modify cfg80211 data */ |
| 545 | if (cbss) { |
Luciano Coelho | 33787fc | 2013-11-11 20:34:54 +0200 | [diff] [blame] | 546 | cbss->channel = sdata->csa_chandef.chan; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 547 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
| 548 | } |
| 549 | } |
| 550 | |
Luciano Coelho | 33787fc | 2013-11-11 20:34:54 +0200 | [diff] [blame] | 551 | ifibss->chandef = sdata->csa_chandef; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 552 | |
| 553 | /* generate the beacon */ |
| 554 | err = ieee80211_ibss_csa_beacon(sdata, NULL); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 555 | if (err < 0) |
| 556 | return err; |
| 557 | |
Michal Kazior | faf046e | 2014-01-29 07:56:17 +0100 | [diff] [blame] | 558 | changed |= err; |
Luciano Coelho | dddd586 | 2013-12-13 21:13:51 +0200 | [diff] [blame] | 559 | |
Michal Kazior | faf046e | 2014-01-29 07:56:17 +0100 | [diff] [blame] | 560 | return changed; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 561 | } |
| 562 | |
| 563 | void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) |
| 564 | { |
| 565 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 566 | |
| 567 | cancel_work_sync(&ifibss->csa_connection_drop_work); |
| 568 | } |
| 569 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 570 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 571 | __acquires(RCU) |
| 572 | { |
| 573 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 574 | u8 addr[ETH_ALEN]; |
| 575 | |
| 576 | memcpy(addr, sta->sta.addr, ETH_ALEN); |
| 577 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 578 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 579 | |
Johannes Berg | 83d5cc0 | 2012-01-12 09:31:10 +0100 | [diff] [blame] | 580 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
| 581 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 582 | /* authorize the station only if the network is not RSN protected. If |
| 583 | * not wait for the userspace to authorize it */ |
| 584 | if (!sta->sdata->u.ibss.control_port) |
| 585 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 586 | |
| 587 | rate_control_rate_init(sta); |
| 588 | |
| 589 | /* If it fails, maybe we raced another insertion? */ |
| 590 | if (sta_info_insert_rcu(sta)) |
| 591 | return sta_info_get(sdata, addr); |
| 592 | return sta; |
| 593 | } |
| 594 | |
| 595 | static struct sta_info * |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 596 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
| 597 | const u8 *addr, u32 supp_rates) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 598 | __acquires(RCU) |
| 599 | { |
| 600 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 601 | struct ieee80211_local *local = sdata->local; |
| 602 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 603 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 604 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 605 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 606 | int band; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 607 | |
| 608 | /* |
| 609 | * XXX: Consider removing the least recently used entry and |
| 610 | * allow new one to be added. |
| 611 | */ |
| 612 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 613 | 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] | 614 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 615 | rcu_read_lock(); |
| 616 | return NULL; |
| 617 | } |
| 618 | |
| 619 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { |
| 620 | rcu_read_lock(); |
| 621 | return NULL; |
| 622 | } |
| 623 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 624 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 625 | rcu_read_lock(); |
| 626 | return NULL; |
| 627 | } |
| 628 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 629 | rcu_read_lock(); |
| 630 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 631 | if (WARN_ON_ONCE(!chanctx_conf)) |
| 632 | return NULL; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 633 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 634 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 635 | rcu_read_unlock(); |
| 636 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 637 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
| 638 | if (!sta) { |
| 639 | rcu_read_lock(); |
| 640 | return NULL; |
| 641 | } |
| 642 | |
| 643 | sta->last_rx = jiffies; |
| 644 | |
| 645 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 646 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 647 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 648 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 649 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 650 | return ieee80211_ibss_finish_sta(sta); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 651 | } |
| 652 | |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 653 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
| 654 | { |
| 655 | struct ieee80211_local *local = sdata->local; |
| 656 | int active = 0; |
| 657 | struct sta_info *sta; |
| 658 | |
| 659 | sdata_assert_lock(sdata); |
| 660 | |
| 661 | rcu_read_lock(); |
| 662 | |
| 663 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 664 | if (sta->sdata == sdata && |
| 665 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
| 666 | jiffies)) { |
| 667 | active++; |
| 668 | break; |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | rcu_read_unlock(); |
| 673 | |
| 674 | return active; |
| 675 | } |
| 676 | |
| 677 | static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) |
| 678 | { |
| 679 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 680 | struct ieee80211_local *local = sdata->local; |
| 681 | struct cfg80211_bss *cbss; |
| 682 | struct beacon_data *presp; |
| 683 | struct sta_info *sta; |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 684 | u16 capability; |
| 685 | |
Sujith Manoharan | d4c80d9 | 2014-01-30 14:17:28 +0530 | [diff] [blame] | 686 | if (!is_zero_ether_addr(ifibss->bssid)) { |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 687 | capability = WLAN_CAPABILITY_IBSS; |
| 688 | |
| 689 | if (ifibss->privacy) |
| 690 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 691 | |
| 692 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
| 693 | ifibss->bssid, ifibss->ssid, |
| 694 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | |
| 695 | WLAN_CAPABILITY_PRIVACY, |
| 696 | capability); |
| 697 | |
| 698 | if (cbss) { |
| 699 | cfg80211_unlink_bss(local->hw.wiphy, cbss); |
| 700 | cfg80211_put_bss(sdata->local->hw.wiphy, cbss); |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; |
| 705 | |
| 706 | sta_info_flush(sdata); |
| 707 | |
| 708 | spin_lock_bh(&ifibss->incomplete_lock); |
| 709 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 710 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 711 | struct sta_info, list); |
| 712 | list_del(&sta->list); |
| 713 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 714 | |
| 715 | sta_info_free(local, sta); |
| 716 | spin_lock_bh(&ifibss->incomplete_lock); |
| 717 | } |
| 718 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 719 | |
| 720 | netif_carrier_off(sdata->dev); |
| 721 | |
| 722 | sdata->vif.bss_conf.ibss_joined = false; |
| 723 | sdata->vif.bss_conf.ibss_creator = false; |
| 724 | sdata->vif.bss_conf.enable_beacon = false; |
| 725 | sdata->vif.bss_conf.ssid_len = 0; |
| 726 | |
| 727 | /* remove beacon */ |
| 728 | presp = rcu_dereference_protected(ifibss->presp, |
| 729 | lockdep_is_held(&sdata->wdev.mtx)); |
| 730 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
| 731 | if (presp) |
| 732 | kfree_rcu(presp, rcu_head); |
| 733 | |
| 734 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); |
| 735 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | |
| 736 | BSS_CHANGED_IBSS); |
Johannes Berg | 55fff50 | 2013-08-19 18:48:41 +0200 | [diff] [blame] | 737 | drv_leave_ibss(local, sdata); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 738 | mutex_lock(&local->mtx); |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 739 | ieee80211_vif_release_channel(sdata); |
Johannes Berg | 34a3740 | 2013-12-18 09:43:33 +0100 | [diff] [blame] | 740 | mutex_unlock(&local->mtx); |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 741 | } |
| 742 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 743 | static void ieee80211_csa_connection_drop_work(struct work_struct *work) |
| 744 | { |
| 745 | struct ieee80211_sub_if_data *sdata = |
| 746 | container_of(work, struct ieee80211_sub_if_data, |
| 747 | u.ibss.csa_connection_drop_work); |
| 748 | |
Luciano Coelho | 6f07d21 | 2013-12-11 20:39:46 +0200 | [diff] [blame] | 749 | sdata_lock(sdata); |
| 750 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 751 | ieee80211_ibss_disconnect(sdata); |
| 752 | synchronize_rcu(); |
| 753 | skb_queue_purge(&sdata->skb_queue); |
| 754 | |
| 755 | /* trigger a scan to find another IBSS network to join */ |
| 756 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Luciano Coelho | 6f07d21 | 2013-12-11 20:39:46 +0200 | [diff] [blame] | 757 | |
| 758 | sdata_unlock(sdata); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 759 | } |
| 760 | |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 761 | static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) |
| 762 | { |
| 763 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 764 | int err; |
| 765 | |
| 766 | /* if the current channel is a DFS channel, mark the channel as |
| 767 | * unavailable. |
| 768 | */ |
| 769 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 770 | &ifibss->chandef, |
| 771 | NL80211_IFTYPE_ADHOC); |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 772 | if (err > 0) |
| 773 | cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, |
| 774 | GFP_ATOMIC); |
| 775 | } |
| 776 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 777 | static bool |
| 778 | ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, |
| 779 | struct ieee802_11_elems *elems, |
| 780 | bool beacon) |
| 781 | { |
| 782 | struct cfg80211_csa_settings params; |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 783 | struct ieee80211_csa_ie csa_ie; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 784 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 785 | enum nl80211_channel_type ch_type; |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 786 | int err; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 787 | u32 sta_flags; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 788 | |
Michal Kazior | dbd7285 | 2014-01-29 07:56:21 +0100 | [diff] [blame] | 789 | sdata_assert_lock(sdata); |
| 790 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 791 | sta_flags = IEEE80211_STA_DISABLE_VHT; |
| 792 | switch (ifibss->chandef.width) { |
| 793 | case NL80211_CHAN_WIDTH_5: |
| 794 | case NL80211_CHAN_WIDTH_10: |
| 795 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 796 | sta_flags |= IEEE80211_STA_DISABLE_HT; |
| 797 | /* fall through */ |
| 798 | case NL80211_CHAN_WIDTH_20: |
| 799 | sta_flags |= IEEE80211_STA_DISABLE_40MHZ; |
| 800 | break; |
| 801 | default: |
| 802 | break; |
| 803 | } |
| 804 | |
| 805 | memset(¶ms, 0, sizeof(params)); |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 806 | memset(&csa_ie, 0, sizeof(csa_ie)); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 807 | err = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, |
| 808 | ifibss->chandef.chan->band, |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 809 | sta_flags, ifibss->bssid, &csa_ie); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 810 | /* can't switch to destination channel, fail */ |
| 811 | if (err < 0) |
| 812 | goto disconnect; |
| 813 | |
| 814 | /* did not contain a CSA */ |
| 815 | if (err) |
| 816 | return false; |
| 817 | |
Simon Wunderlich | 0834ae3 | 2013-11-26 16:45:18 +0100 | [diff] [blame] | 818 | /* channel switch is not supported, disconnect */ |
| 819 | if (!(sdata->local->hw.wiphy->flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) |
| 820 | goto disconnect; |
| 821 | |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 822 | params.count = csa_ie.count; |
| 823 | params.chandef = csa_ie.chandef; |
| 824 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 825 | switch (ifibss->chandef.width) { |
| 826 | case NL80211_CHAN_WIDTH_20_NOHT: |
| 827 | case NL80211_CHAN_WIDTH_20: |
| 828 | case NL80211_CHAN_WIDTH_40: |
| 829 | /* keep our current HT mode (HT20/HT40+/HT40-), even if |
| 830 | * another mode has been announced. The mode is not adopted |
| 831 | * within the beacon while doing CSA and we should therefore |
| 832 | * keep the mode which we announce. |
| 833 | */ |
| 834 | ch_type = cfg80211_get_chandef_type(&ifibss->chandef); |
| 835 | cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, |
| 836 | ch_type); |
| 837 | break; |
| 838 | case NL80211_CHAN_WIDTH_5: |
| 839 | case NL80211_CHAN_WIDTH_10: |
| 840 | if (params.chandef.width != ifibss->chandef.width) { |
| 841 | sdata_info(sdata, |
| 842 | "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", |
| 843 | ifibss->bssid, |
| 844 | params.chandef.chan->center_freq, |
| 845 | params.chandef.width, |
| 846 | params.chandef.center_freq1, |
| 847 | params.chandef.center_freq2); |
| 848 | goto disconnect; |
| 849 | } |
| 850 | break; |
| 851 | default: |
| 852 | /* should not happen, sta_flags should prevent VHT modes. */ |
| 853 | WARN_ON(1); |
| 854 | goto disconnect; |
| 855 | } |
| 856 | |
Ilan Peer | 174e0cd | 2014-02-23 09:13:01 +0200 | [diff] [blame] | 857 | if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, |
| 858 | NL80211_IFTYPE_ADHOC)) { |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 859 | sdata_info(sdata, |
| 860 | "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", |
| 861 | ifibss->bssid, |
| 862 | params.chandef.chan->center_freq, |
| 863 | params.chandef.width, |
| 864 | params.chandef.center_freq1, |
| 865 | params.chandef.center_freq2); |
| 866 | goto disconnect; |
| 867 | } |
| 868 | |
| 869 | err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 870 | ¶ms.chandef, |
| 871 | NL80211_IFTYPE_ADHOC); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 872 | if (err < 0) |
| 873 | goto disconnect; |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 874 | if (err > 0 && !ifibss->userspace_handles_dfs) { |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 875 | /* IBSS-DFS only allowed with a control program */ |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 876 | goto disconnect; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 877 | } |
| 878 | |
Luciano Coelho | 2beb6dab | 2014-02-18 11:40:36 +0200 | [diff] [blame] | 879 | params.radar_required = err; |
| 880 | |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 881 | if (cfg80211_chandef_identical(¶ms.chandef, |
| 882 | &sdata->vif.bss_conf.chandef)) { |
| 883 | ibss_dbg(sdata, |
| 884 | "received csa with an identical chandef, ignoring\n"); |
| 885 | return true; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 886 | } |
| 887 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 888 | /* all checks done, now perform the channel switch. */ |
| 889 | ibss_dbg(sdata, |
| 890 | "received channel switch announcement to go to channel %d MHz\n", |
| 891 | params.chandef.chan->center_freq); |
| 892 | |
Chun-Yeow Yeoh | c0f17eb | 2013-10-14 19:08:29 -0700 | [diff] [blame] | 893 | params.block_tx = !!csa_ie.mode; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 894 | |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 895 | if (ieee80211_channel_switch(sdata->local->hw.wiphy, sdata->dev, |
| 896 | ¶ms)) |
| 897 | goto disconnect; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 898 | |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 899 | ieee80211_ibss_csa_mark_radar(sdata); |
| 900 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 901 | return true; |
| 902 | disconnect: |
| 903 | ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); |
| 904 | ieee80211_queue_work(&sdata->local->hw, |
| 905 | &ifibss->csa_connection_drop_work); |
| 906 | |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 907 | ieee80211_ibss_csa_mark_radar(sdata); |
| 908 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 909 | return true; |
| 910 | } |
| 911 | |
| 912 | static void |
| 913 | ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, |
| 914 | struct ieee80211_mgmt *mgmt, size_t len, |
| 915 | struct ieee80211_rx_status *rx_status, |
| 916 | struct ieee802_11_elems *elems) |
| 917 | { |
| 918 | int required_len; |
| 919 | |
| 920 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) |
| 921 | return; |
| 922 | |
| 923 | /* CSA is the only action we handle for now */ |
| 924 | if (mgmt->u.action.u.measurement.action_code != |
| 925 | WLAN_ACTION_SPCT_CHL_SWITCH) |
| 926 | return; |
| 927 | |
| 928 | required_len = IEEE80211_MIN_ACTION_SIZE + |
| 929 | sizeof(mgmt->u.action.u.chan_switch); |
| 930 | if (len < required_len) |
| 931 | return; |
| 932 | |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 933 | if (!sdata->vif.csa_active) |
| 934 | ieee80211_ibss_process_chanswitch(sdata, elems, false); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 935 | } |
| 936 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 937 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
| 938 | struct ieee80211_mgmt *mgmt, |
| 939 | size_t len) |
| 940 | { |
| 941 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); |
| 942 | |
| 943 | if (len < IEEE80211_DEAUTH_FRAME_LEN) |
| 944 | return; |
| 945 | |
| 946 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", |
| 947 | mgmt->sa, mgmt->da, mgmt->bssid, reason); |
| 948 | sta_info_destroy_addr(sdata, mgmt->sa); |
| 949 | } |
| 950 | |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 951 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
| 952 | struct ieee80211_mgmt *mgmt, |
| 953 | size_t len) |
| 954 | { |
| 955 | u16 auth_alg, auth_transaction; |
| 956 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 957 | sdata_assert_lock(sdata); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 958 | |
| 959 | if (len < 24 + 6) |
| 960 | return; |
| 961 | |
| 962 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
| 963 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
| 964 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 965 | ibss_dbg(sdata, |
| 966 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", |
| 967 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); |
Antonio Quartulli | 7bed205 | 2012-11-25 23:24:27 +0100 | [diff] [blame] | 968 | |
| 969 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
| 970 | return; |
| 971 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 972 | /* |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 973 | * IEEE 802.11 standard does not require authentication in IBSS |
| 974 | * networks and most implementations do not seem to use it. |
| 975 | * However, try to reply to authentication attempts if someone |
| 976 | * has actually implemented this. |
| 977 | */ |
Jouni Malinen | 700e8ea | 2012-09-30 19:29:37 +0300 | [diff] [blame] | 978 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
Johannes Berg | 1672c0e3 | 2013-01-29 15:02:27 +0100 | [diff] [blame] | 979 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 980 | } |
| 981 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 982 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 983 | struct ieee80211_mgmt *mgmt, size_t len, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 984 | struct ieee80211_rx_status *rx_status, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 985 | struct ieee802_11_elems *elems) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 986 | { |
| 987 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 988 | struct cfg80211_bss *cbss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 989 | struct ieee80211_bss *bss; |
| 990 | struct sta_info *sta; |
| 991 | struct ieee80211_channel *channel; |
| 992 | u64 beacon_timestamp, rx_timestamp; |
| 993 | u32 supp_rates = 0; |
| 994 | enum ieee80211_band band = rx_status->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 995 | enum nl80211_bss_scan_width scan_width; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 996 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
| 997 | bool rates_updated = false; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 998 | |
Emmanuel Grumbach | 3afc216 | 2014-03-04 16:50:13 +0200 | [diff] [blame] | 999 | channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); |
| 1000 | if (!channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1001 | return; |
| 1002 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1003 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1004 | ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1005 | |
| 1006 | rcu_read_lock(); |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 1007 | sta = sta_info_get(sdata, mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1008 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1009 | if (elems->supp_rates) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1010 | supp_rates = ieee80211_sta_get_rates(sdata, elems, |
Ashok Nagarajan | 9ebb61a | 2012-04-02 21:21:21 -0700 | [diff] [blame] | 1011 | band, NULL); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1012 | if (sta) { |
| 1013 | u32 prev_rates; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1014 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1015 | prev_rates = sta->sta.supp_rates[band]; |
| 1016 | /* make sure mandatory rates are always added */ |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1017 | scan_width = NL80211_BSS_CHAN_WIDTH_20; |
| 1018 | if (rx_status->flag & RX_FLAG_5MHZ) |
| 1019 | scan_width = NL80211_BSS_CHAN_WIDTH_5; |
| 1020 | if (rx_status->flag & RX_FLAG_10MHZ) |
| 1021 | scan_width = NL80211_BSS_CHAN_WIDTH_10; |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1022 | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1023 | sta->sta.supp_rates[band] = supp_rates | |
| 1024 | ieee80211_mandatory_rates(sband, |
| 1025 | scan_width); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1026 | if (sta->sta.supp_rates[band] != prev_rates) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1027 | ibss_dbg(sdata, |
| 1028 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", |
| 1029 | sta->sta.addr, prev_rates, |
| 1030 | sta->sta.supp_rates[band]); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1031 | rates_updated = true; |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1032 | } |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1033 | } else { |
| 1034 | rcu_read_unlock(); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1035 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 1036 | mgmt->sa, supp_rates); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1037 | } |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1038 | } |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1039 | |
| 1040 | if (sta && elems->wmm_info) |
Johannes Berg | a74a8c8 | 2014-07-22 14:50:47 +0200 | [diff] [blame] | 1041 | sta->sta.wme = true; |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1042 | |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 1043 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1044 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && |
| 1045 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && |
| 1046 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1047 | /* we both use HT */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 1048 | struct ieee80211_ht_cap htcap_ie; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1049 | struct cfg80211_chan_def chandef; |
| 1050 | |
| 1051 | ieee80211_ht_oper_to_chandef(channel, |
| 1052 | elems->ht_operation, |
| 1053 | &chandef); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1054 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 1055 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1056 | |
| 1057 | /* |
| 1058 | * fall back to HT20 if we don't use or use |
| 1059 | * the other extension channel |
| 1060 | */ |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1061 | if (chandef.center_freq1 != |
| 1062 | sdata->u.ibss.chandef.center_freq1) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 1063 | htcap_ie.cap_info &= |
| 1064 | cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1065 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 1066 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap( |
| 1067 | sdata, sband, &htcap_ie, sta); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1068 | } |
| 1069 | |
Antonio Quartulli | e687f61 | 2012-08-12 18:24:55 +0200 | [diff] [blame] | 1070 | if (sta && rates_updated) { |
| 1071 | drv_sta_rc_update(local, sdata, &sta->sta, |
| 1072 | IEEE80211_RC_SUPP_RATES_CHANGED); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1073 | rate_control_rate_init(sta); |
Antonio Quartulli | e687f61 | 2012-08-12 18:24:55 +0200 | [diff] [blame] | 1074 | } |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 1075 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 1076 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1080 | channel); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1081 | if (!bss) |
| 1082 | return; |
| 1083 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1084 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
| 1085 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 1086 | /* same for beacon and probe response */ |
| 1087 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1088 | |
| 1089 | /* check if we need to merge IBSS */ |
| 1090 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1091 | /* not an IBSS */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1092 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1093 | goto put_bss; |
| 1094 | |
| 1095 | /* different channel */ |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1096 | if (sdata->u.ibss.fixed_channel && |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1097 | sdata->u.ibss.chandef.chan != cbss->channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1098 | goto put_bss; |
| 1099 | |
| 1100 | /* different SSID */ |
| 1101 | if (elems->ssid_len != sdata->u.ibss.ssid_len || |
| 1102 | memcmp(elems->ssid, sdata->u.ibss.ssid, |
| 1103 | sdata->u.ibss.ssid_len)) |
| 1104 | goto put_bss; |
| 1105 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1106 | /* process channel switch */ |
Luciano Coelho | 82a8e17 | 2013-12-13 21:13:50 +0200 | [diff] [blame] | 1107 | if (sdata->vif.csa_active || |
| 1108 | ieee80211_ibss_process_chanswitch(sdata, elems, true)) |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1109 | goto put_bss; |
| 1110 | |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 1111 | /* same BSSID */ |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1112 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 1113 | goto put_bss; |
| 1114 | |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1115 | /* we use a fixed BSSID */ |
| 1116 | if (sdata->u.ibss.fixed_bssid) |
| 1117 | goto put_bss; |
| 1118 | |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 1119 | if (ieee80211_have_rx_timestamp(rx_status)) { |
| 1120 | /* time when timestamp field was received */ |
| 1121 | rx_timestamp = |
| 1122 | ieee80211_calculate_rx_timestamp(local, rx_status, |
| 1123 | len + FCS_LEN, 24); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1124 | } else { |
| 1125 | /* |
| 1126 | * second best option: get current TSF |
| 1127 | * (will return -1 if not supported) |
| 1128 | */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 1129 | rx_timestamp = drv_get_tsf(local, sdata); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1130 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1131 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1132 | ibss_dbg(sdata, |
| 1133 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", |
| 1134 | mgmt->sa, mgmt->bssid, |
| 1135 | (unsigned long long)rx_timestamp, |
| 1136 | (unsigned long long)beacon_timestamp, |
| 1137 | (unsigned long long)(rx_timestamp - beacon_timestamp), |
| 1138 | jiffies); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1139 | |
| 1140 | if (beacon_timestamp > rx_timestamp) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1141 | ibss_dbg(sdata, |
| 1142 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", |
| 1143 | mgmt->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1144 | ieee80211_sta_join_ibss(sdata, bss); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1145 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 1146 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 1147 | supp_rates); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1148 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1149 | } |
| 1150 | |
| 1151 | put_bss: |
| 1152 | ieee80211_rx_bss_put(local, bss); |
| 1153 | } |
| 1154 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1155 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
| 1156 | const u8 *bssid, const u8 *addr, |
| 1157 | u32 supp_rates) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1158 | { |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 1159 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1160 | struct ieee80211_local *local = sdata->local; |
| 1161 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1162 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 1163 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1164 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1165 | int band; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1166 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1167 | /* |
| 1168 | * XXX: Consider removing the least recently used entry and |
| 1169 | * allow new one to be added. |
| 1170 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1171 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1172 | 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] | 1173 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1174 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1175 | } |
| 1176 | |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 1177 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1178 | return; |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 1179 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1180 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1181 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1182 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1183 | rcu_read_lock(); |
| 1184 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 1185 | if (WARN_ON_ONCE(!chanctx_conf)) { |
| 1186 | rcu_read_unlock(); |
| 1187 | return; |
| 1188 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 1189 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1190 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1191 | rcu_read_unlock(); |
| 1192 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1193 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1194 | if (!sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1195 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1196 | |
Rajkumar Manoharan | c8716d9 | 2010-10-23 10:59:57 +0530 | [diff] [blame] | 1197 | sta->last_rx = jiffies; |
Johannes Berg | d9a7ddb | 2011-12-14 12:35:30 +0100 | [diff] [blame] | 1198 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1199 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 1200 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1201 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 1202 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1203 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1204 | spin_lock(&ifibss->incomplete_lock); |
| 1205 | list_add(&sta->list, &ifibss->incomplete_stations); |
| 1206 | spin_unlock(&ifibss->incomplete_lock); |
| 1207 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1208 | } |
| 1209 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1210 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
| 1211 | { |
| 1212 | struct ieee80211_local *local = sdata->local; |
| 1213 | struct sta_info *sta, *tmp; |
| 1214 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; |
| 1215 | unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
| 1216 | |
| 1217 | mutex_lock(&local->sta_mtx); |
| 1218 | |
| 1219 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
| 1220 | if (sdata != sta->sdata) |
| 1221 | continue; |
| 1222 | |
| 1223 | if (time_after(jiffies, sta->last_rx + exp_time) || |
| 1224 | (time_after(jiffies, sta->last_rx + exp_rsn_time) && |
| 1225 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
| 1226 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", |
| 1227 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? |
| 1228 | "not authorized " : "", sta->sta.addr); |
| 1229 | |
| 1230 | WARN_ON(__sta_info_destroy(sta)); |
| 1231 | } |
| 1232 | } |
| 1233 | |
| 1234 | mutex_unlock(&local->sta_mtx); |
| 1235 | } |
| 1236 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1237 | /* |
| 1238 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED |
| 1239 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1240 | |
| 1241 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) |
| 1242 | { |
| 1243 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1244 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1245 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1246 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1247 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1248 | mod_timer(&ifibss->timer, |
| 1249 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1250 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 1251 | ieee80211_ibss_sta_expire(sdata); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1252 | |
Sujith | 450aae3 | 2009-11-02 12:33:23 +0530 | [diff] [blame] | 1253 | if (time_before(jiffies, ifibss->last_scan_completed + |
| 1254 | IEEE80211_IBSS_MERGE_INTERVAL)) |
| 1255 | return; |
| 1256 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1257 | if (ieee80211_sta_active_ibss(sdata)) |
| 1258 | return; |
| 1259 | |
John W. Linville | c037b83 | 2012-01-30 15:28:11 -0500 | [diff] [blame] | 1260 | if (ifibss->fixed_channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1261 | return; |
| 1262 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1263 | sdata_info(sdata, |
| 1264 | "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] | 1265 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1266 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1267 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1268 | NULL, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1269 | } |
| 1270 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1271 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1272 | { |
| 1273 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1274 | u8 bssid[ETH_ALEN]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1275 | u16 capability; |
| 1276 | int i; |
| 1277 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1278 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1279 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1280 | if (ifibss->fixed_bssid) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1281 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
| 1282 | } else { |
| 1283 | /* Generate random, not broadcast, locally administered BSSID. Mix in |
| 1284 | * own MAC address to make sure that devices that do not have proper |
| 1285 | * random number generator get different BSSID. */ |
| 1286 | get_random_bytes(bssid, ETH_ALEN); |
| 1287 | for (i = 0; i < ETH_ALEN; i++) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 1288 | bssid[i] ^= sdata->vif.addr[i]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1289 | bssid[0] &= ~0x01; |
| 1290 | bssid[0] |= 0x02; |
| 1291 | } |
| 1292 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1293 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1294 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1295 | capability = WLAN_CAPABILITY_IBSS; |
| 1296 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1297 | if (ifibss->privacy) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1298 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 1299 | else |
| 1300 | sdata->drop_unencrypted = 0; |
| 1301 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1302 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
Simon Wunderlich | 75a423f | 2013-08-21 15:30:25 +0200 | [diff] [blame] | 1303 | &ifibss->chandef, ifibss->basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 1304 | capability, 0, true); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1305 | } |
| 1306 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1307 | /* |
| 1308 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH |
| 1309 | */ |
| 1310 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1311 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1312 | { |
| 1313 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1314 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1315 | struct cfg80211_bss *cbss; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1316 | struct ieee80211_channel *chan = NULL; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1317 | const u8 *bssid = NULL; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1318 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1319 | int active_ibss; |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 1320 | u16 capability; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1321 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1322 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1323 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1324 | active_ibss = ieee80211_sta_active_ibss(sdata); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1325 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1326 | |
| 1327 | if (active_ibss) |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1328 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1329 | |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 1330 | capability = WLAN_CAPABILITY_IBSS; |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1331 | if (ifibss->privacy) |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 1332 | capability |= WLAN_CAPABILITY_PRIVACY; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1333 | if (ifibss->fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1334 | bssid = ifibss->bssid; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1335 | if (ifibss->fixed_channel) |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1336 | chan = ifibss->chandef.chan; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1337 | if (!is_zero_ether_addr(ifibss->bssid)) |
| 1338 | bssid = ifibss->bssid; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1339 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
| 1340 | ifibss->ssid, ifibss->ssid_len, |
| 1341 | WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, |
| 1342 | capability); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1343 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 1344 | if (cbss) { |
| 1345 | struct ieee80211_bss *bss; |
| 1346 | |
| 1347 | bss = (void *)cbss->priv; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1348 | ibss_dbg(sdata, |
| 1349 | "sta_find_ibss: selected %pM current %pM\n", |
| 1350 | cbss->bssid, ifibss->bssid); |
| 1351 | sdata_info(sdata, |
| 1352 | "Selected IBSS BSSID %pM based on configured SSID\n", |
| 1353 | cbss->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1354 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1355 | ieee80211_sta_join_ibss(sdata, bss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1356 | ieee80211_rx_bss_put(local, bss); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1357 | return; |
Reinette Chatre | d419b9f | 2009-10-19 14:55:37 -0700 | [diff] [blame] | 1358 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1359 | |
Antonio Quartulli | d8eb741 | 2013-08-09 18:58:32 +0200 | [diff] [blame] | 1360 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
| 1361 | * directly and do not waste time scanning |
| 1362 | */ |
| 1363 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { |
| 1364 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", |
| 1365 | bssid); |
| 1366 | ieee80211_sta_create_ibss(sdata); |
| 1367 | return; |
| 1368 | } |
| 1369 | |
| 1370 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1371 | 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] | 1372 | |
| 1373 | /* Selected IBSS not found in current scan results - try to scan */ |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1374 | if (time_after(jiffies, ifibss->last_scan_completed + |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1375 | IEEE80211_SCAN_INTERVAL)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1376 | 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] | 1377 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1378 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 1379 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 1380 | ifibss->ssid_len, chan, |
| 1381 | scan_width); |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 1382 | } else { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1383 | int interval = IEEE80211_SCAN_INTERVAL; |
| 1384 | |
| 1385 | if (time_after(jiffies, ifibss->ibss_join_req + |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 1386 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
| 1387 | ieee80211_sta_create_ibss(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1388 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1389 | mod_timer(&ifibss->timer, |
| 1390 | round_jiffies(jiffies + interval)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1391 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1392 | } |
| 1393 | |
| 1394 | static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata, |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1395 | struct sk_buff *req) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1396 | { |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1397 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1398 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1399 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1400 | int tx_last_beacon, len = req->len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1401 | struct sk_buff *skb; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1402 | struct beacon_data *presp; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1403 | u8 *pos, *end; |
| 1404 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1405 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1406 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1407 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1408 | lockdep_is_held(&sdata->wdev.mtx)); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1409 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1410 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 1411 | len < 24 + 2 || !presp) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1412 | return; |
| 1413 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 1414 | tx_last_beacon = drv_tx_last_beacon(local); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1415 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1416 | ibss_dbg(sdata, |
| 1417 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", |
| 1418 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1419 | |
Felix Fietkau | 1ed7648 | 2011-03-24 19:46:18 +0100 | [diff] [blame] | 1420 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1421 | return; |
| 1422 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 1423 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
Felix Fietkau | 888d04d | 2012-03-01 15:22:09 +0100 | [diff] [blame] | 1424 | !is_broadcast_ether_addr(mgmt->bssid)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1425 | return; |
| 1426 | |
| 1427 | end = ((u8 *) mgmt) + len; |
| 1428 | pos = mgmt->u.probe_req.variable; |
| 1429 | if (pos[0] != WLAN_EID_SSID || |
| 1430 | pos + 2 + pos[1] > end) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 1431 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
| 1432 | mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1433 | return; |
| 1434 | } |
| 1435 | if (pos[1] != 0 && |
| 1436 | (pos[1] != ifibss->ssid_len || |
Benoit Papillault | 0da780c | 2010-02-05 01:21:03 +0100 | [diff] [blame] | 1437 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1438 | /* Ignore ProbeReq for foreign SSID */ |
| 1439 | return; |
| 1440 | } |
| 1441 | |
| 1442 | /* Reply with ProbeResp */ |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1443 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1444 | if (!skb) |
| 1445 | return; |
| 1446 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1447 | skb_reserve(skb, local->tx_headroom); |
| 1448 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); |
| 1449 | |
| 1450 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); |
| 1451 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 1452 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
Simon Wunderlich | 691eb61 | 2014-01-24 23:48:29 +0100 | [diff] [blame] | 1453 | |
| 1454 | /* avoid excessive retries for probe request to wildcard SSIDs */ |
| 1455 | if (pos[1] == 0) |
| 1456 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_NO_ACK; |
| 1457 | |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 1458 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1459 | } |
| 1460 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1461 | static |
| 1462 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, |
| 1463 | struct ieee80211_mgmt *mgmt, size_t len, |
| 1464 | struct ieee80211_rx_status *rx_status) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1465 | { |
| 1466 | size_t baselen; |
| 1467 | struct ieee802_11_elems elems; |
| 1468 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1469 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
| 1470 | offsetof(typeof(mgmt->u.beacon), variable)); |
| 1471 | |
| 1472 | /* |
| 1473 | * either beacon or probe_resp but the variable field is at the |
| 1474 | * same offset |
| 1475 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1476 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 1477 | if (baselen > len) |
| 1478 | return; |
| 1479 | |
| 1480 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
Johannes Berg | b2e506b | 2013-03-26 14:54:16 +0100 | [diff] [blame] | 1481 | false, &elems); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1482 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1483 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1484 | } |
| 1485 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1486 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 1487 | struct sk_buff *skb) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1488 | { |
| 1489 | struct ieee80211_rx_status *rx_status; |
| 1490 | struct ieee80211_mgmt *mgmt; |
| 1491 | u16 fc; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1492 | struct ieee802_11_elems elems; |
| 1493 | int ies_len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1494 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 1495 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1496 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 1497 | fc = le16_to_cpu(mgmt->frame_control); |
| 1498 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1499 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1500 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1501 | if (!sdata->u.ibss.ssid_len) |
| 1502 | goto mgmt_out; /* not ready to merge yet */ |
| 1503 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1504 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 1505 | case IEEE80211_STYPE_PROBE_REQ: |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1506 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1507 | break; |
| 1508 | case IEEE80211_STYPE_PROBE_RESP: |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1509 | case IEEE80211_STYPE_BEACON: |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1510 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
| 1511 | rx_status); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1512 | break; |
| 1513 | case IEEE80211_STYPE_AUTH: |
| 1514 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); |
| 1515 | break; |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 1516 | case IEEE80211_STYPE_DEAUTH: |
| 1517 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); |
| 1518 | break; |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1519 | case IEEE80211_STYPE_ACTION: |
| 1520 | switch (mgmt->u.action.category) { |
| 1521 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
| 1522 | ies_len = skb->len - |
| 1523 | offsetof(struct ieee80211_mgmt, |
| 1524 | u.action.u.chan_switch.variable); |
| 1525 | |
| 1526 | if (ies_len < 0) |
| 1527 | break; |
| 1528 | |
| 1529 | ieee802_11_parse_elems( |
| 1530 | mgmt->u.action.u.chan_switch.variable, |
| 1531 | ies_len, true, &elems); |
| 1532 | |
| 1533 | if (elems.parse_error) |
| 1534 | break; |
| 1535 | |
| 1536 | ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, |
| 1537 | rx_status, &elems); |
| 1538 | break; |
| 1539 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1540 | } |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1541 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1542 | mgmt_out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1543 | sdata_unlock(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1544 | } |
| 1545 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1546 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1547 | { |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1548 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1549 | struct sta_info *sta; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1550 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1551 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1552 | |
| 1553 | /* |
| 1554 | * Work could be scheduled after scan or similar |
| 1555 | * when we aren't even joined (or trying) with a |
| 1556 | * network. |
| 1557 | */ |
| 1558 | if (!ifibss->ssid_len) |
| 1559 | goto out; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1560 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1561 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1562 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 1563 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 1564 | struct sta_info, list); |
| 1565 | list_del(&sta->list); |
| 1566 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1567 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 1568 | ieee80211_ibss_finish_sta(sta); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1569 | rcu_read_unlock(); |
| 1570 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1571 | } |
| 1572 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1573 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1574 | switch (ifibss->state) { |
| 1575 | case IEEE80211_IBSS_MLME_SEARCH: |
| 1576 | ieee80211_sta_find_ibss(sdata); |
| 1577 | break; |
| 1578 | case IEEE80211_IBSS_MLME_JOINED: |
| 1579 | ieee80211_sta_merge_ibss(sdata); |
| 1580 | break; |
| 1581 | default: |
| 1582 | WARN_ON(1); |
| 1583 | break; |
| 1584 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1585 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1586 | out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1587 | sdata_unlock(sdata); |
Johannes Berg | 3a4d4aa | 2010-05-26 16:41:40 +0200 | [diff] [blame] | 1588 | } |
| 1589 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1590 | static void ieee80211_ibss_timer(unsigned long data) |
| 1591 | { |
| 1592 | struct ieee80211_sub_if_data *sdata = |
| 1593 | (struct ieee80211_sub_if_data *) data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1594 | |
Stanislaw Gruszka | a618294 | 2013-02-28 10:55:28 +0100 | [diff] [blame] | 1595 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1596 | } |
| 1597 | |
| 1598 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
| 1599 | { |
| 1600 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1601 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1602 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
| 1603 | (unsigned long) sdata); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1604 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
| 1605 | spin_lock_init(&ifibss->incomplete_lock); |
Simon Wunderlich | cd7760e | 2013-08-28 13:41:31 +0200 | [diff] [blame] | 1606 | INIT_WORK(&ifibss->csa_connection_drop_work, |
| 1607 | ieee80211_csa_connection_drop_work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1608 | } |
| 1609 | |
| 1610 | /* scan finished notification */ |
| 1611 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) |
| 1612 | { |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1613 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1614 | |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1615 | mutex_lock(&local->iflist_mtx); |
| 1616 | list_for_each_entry(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 1617 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1618 | continue; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1619 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 1620 | continue; |
| 1621 | sdata->u.ibss.last_scan_completed = jiffies; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1622 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1623 | } |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1624 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1625 | } |
| 1626 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1627 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
| 1628 | struct cfg80211_ibss_params *params) |
| 1629 | { |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1630 | u32 changed = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1631 | u32 rate_flags; |
| 1632 | struct ieee80211_supported_band *sband; |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1633 | enum ieee80211_chanctx_mode chanmode; |
| 1634 | struct ieee80211_local *local = sdata->local; |
| 1635 | int radar_detect_width = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1636 | int i; |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1637 | int ret; |
| 1638 | |
| 1639 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, |
| 1640 | ¶ms->chandef, |
| 1641 | sdata->wdev.iftype); |
| 1642 | if (ret < 0) |
| 1643 | return ret; |
| 1644 | |
| 1645 | if (ret > 0) { |
| 1646 | if (!params->userspace_handles_dfs) |
| 1647 | return -EINVAL; |
| 1648 | radar_detect_width = BIT(params->chandef.width); |
| 1649 | } |
| 1650 | |
| 1651 | chanmode = (params->channel_fixed && !ret) ? |
| 1652 | IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; |
| 1653 | |
| 1654 | mutex_lock(&local->chanctx_mtx); |
| 1655 | ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, |
| 1656 | radar_detect_width); |
| 1657 | mutex_unlock(&local->chanctx_mtx); |
| 1658 | if (ret < 0) |
| 1659 | return ret; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1660 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1661 | if (params->bssid) { |
| 1662 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); |
| 1663 | sdata->u.ibss.fixed_bssid = true; |
| 1664 | } else |
| 1665 | sdata->u.ibss.fixed_bssid = false; |
| 1666 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1667 | sdata->u.ibss.privacy = params->privacy; |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 1668 | sdata->u.ibss.control_port = params->control_port; |
Simon Wunderlich | 8e8d347 | 2013-10-07 18:41:06 +0200 | [diff] [blame] | 1669 | sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 1670 | sdata->u.ibss.basic_rates = params->basic_rates; |
Krzysztof HaĆasa | c7d37a6 | 2014-05-26 14:14:46 +0200 | [diff] [blame] | 1671 | sdata->u.ibss.last_scan_completed = jiffies; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1672 | |
| 1673 | /* fix basic_rates if channel does not support these rates */ |
| 1674 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1675 | sband = local->hw.wiphy->bands[params->chandef.chan->band]; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1676 | for (i = 0; i < sband->n_bitrates; i++) { |
| 1677 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 1678 | sdata->u.ibss.basic_rates &= ~BIT(i); |
| 1679 | } |
Felix Fietkau | dd5b4cc | 2010-11-22 20:58:24 +0100 | [diff] [blame] | 1680 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
| 1681 | sizeof(params->mcast_rate)); |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1682 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1683 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
| 1684 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1685 | sdata->u.ibss.chandef = params->chandef; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1686 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
| 1687 | |
| 1688 | if (params->ie) { |
| 1689 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, |
| 1690 | GFP_KERNEL); |
| 1691 | if (sdata->u.ibss.ie) |
| 1692 | sdata->u.ibss.ie_len = params->ie_len; |
| 1693 | } |
| 1694 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1695 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
| 1696 | sdata->u.ibss.ibss_join_req = jiffies; |
| 1697 | |
Antonio Quartulli | badecb0 | 2012-10-26 18:54:25 +0200 | [diff] [blame] | 1698 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1699 | sdata->u.ibss.ssid_len = params->ssid_len; |
| 1700 | |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1701 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
| 1702 | sizeof(sdata->u.ibss.ht_capa)); |
| 1703 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, |
| 1704 | sizeof(sdata->u.ibss.ht_capa_mask)); |
| 1705 | |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1706 | /* |
| 1707 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is |
| 1708 | * reserved, but an HT STA shall protect HT transmissions as though |
| 1709 | * the HT Protection field were set to non-HT mixed mode. |
| 1710 | * |
| 1711 | * In an IBSS, the RIFS Mode field of the HT Operation element is |
| 1712 | * also reserved, but an HT STA shall operate as though this field |
| 1713 | * were set to 1. |
| 1714 | */ |
| 1715 | |
| 1716 | sdata->vif.bss_conf.ht_operation_mode |= |
| 1717 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
| 1718 | | IEEE80211_HT_PARAM_RIFS_MODE; |
| 1719 | |
| 1720 | changed |= BSS_CHANGED_HT; |
| 1721 | ieee80211_bss_info_change_notify(sdata, changed); |
| 1722 | |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 1723 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1724 | sdata->needed_rx_chains = local->rx_chains; |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 1725 | |
Luciano Coelho | 71965c1 | 2014-02-18 17:07:53 +0200 | [diff] [blame] | 1726 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1727 | |
| 1728 | return 0; |
| 1729 | } |
| 1730 | |
| 1731 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) |
| 1732 | { |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1733 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1734 | |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 1735 | ieee80211_ibss_disconnect(sdata); |
Simon Wunderlich | b78a493 | 2012-11-13 18:43:03 +0100 | [diff] [blame] | 1736 | ifibss->ssid_len = 0; |
Simon Wunderlich | 871a418 | 2013-08-28 13:41:30 +0200 | [diff] [blame] | 1737 | memset(ifibss->bssid, 0, ETH_ALEN); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1738 | |
| 1739 | /* remove beacon */ |
| 1740 | kfree(sdata->u.ibss.ie); |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1741 | |
| 1742 | /* on the next join, re-program HT parameters */ |
| 1743 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); |
| 1744 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); |
| 1745 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1746 | synchronize_rcu(); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1747 | |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 1748 | skb_queue_purge(&sdata->skb_queue); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1749 | |
Johannes Berg | bc05d19 | 2010-07-21 10:52:40 +0200 | [diff] [blame] | 1750 | del_timer_sync(&sdata->u.ibss.timer); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1751 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1752 | return 0; |
| 1753 | } |