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, |
| 42 | bool *have_higher_than_11mbit) |
| 43 | { |
| 44 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 45 | struct ieee80211_local *local = sdata->local; |
| 46 | int rates_n = 0, i, ri; |
| 47 | struct ieee80211_mgmt *mgmt; |
| 48 | u8 *pos; |
| 49 | struct ieee80211_supported_band *sband; |
| 50 | u32 rate_flags, rates = 0, rates_added = 0; |
| 51 | struct beacon_data *presp; |
| 52 | int frame_len; |
| 53 | int shift; |
| 54 | |
| 55 | /* Build IBSS probe response */ |
| 56 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
| 57 | 12 /* struct ieee80211_mgmt.u.beacon */ + |
| 58 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + |
| 59 | 2 + 8 /* max Supported Rates */ + |
| 60 | 3 /* max DS params */ + |
| 61 | 4 /* IBSS params */ + |
| 62 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
| 63 | 2 + sizeof(struct ieee80211_ht_cap) + |
| 64 | 2 + sizeof(struct ieee80211_ht_operation) + |
| 65 | ifibss->ie_len; |
| 66 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); |
| 67 | if (!presp) |
| 68 | return NULL; |
| 69 | |
| 70 | presp->head = (void *)(presp + 1); |
| 71 | |
| 72 | mgmt = (void *) presp->head; |
| 73 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 74 | IEEE80211_STYPE_PROBE_RESP); |
| 75 | eth_broadcast_addr(mgmt->da); |
| 76 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 77 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
| 78 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
| 79 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
| 80 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
| 81 | |
| 82 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
| 83 | |
| 84 | *pos++ = WLAN_EID_SSID; |
| 85 | *pos++ = ifibss->ssid_len; |
| 86 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); |
| 87 | pos += ifibss->ssid_len; |
| 88 | |
| 89 | sband = local->hw.wiphy->bands[chandef->chan->band]; |
| 90 | rate_flags = ieee80211_chandef_rate_flags(chandef); |
| 91 | shift = ieee80211_chandef_get_shift(chandef); |
| 92 | rates_n = 0; |
| 93 | if (have_higher_than_11mbit) |
| 94 | *have_higher_than_11mbit = false; |
| 95 | |
| 96 | for (i = 0; i < sband->n_bitrates; i++) { |
| 97 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 98 | continue; |
| 99 | if (sband->bitrates[i].bitrate > 110 && |
| 100 | have_higher_than_11mbit) |
| 101 | *have_higher_than_11mbit = true; |
| 102 | |
| 103 | rates |= BIT(i); |
| 104 | rates_n++; |
| 105 | } |
| 106 | |
| 107 | *pos++ = WLAN_EID_SUPP_RATES; |
| 108 | *pos++ = min_t(int, 8, rates_n); |
| 109 | for (ri = 0; ri < sband->n_bitrates; ri++) { |
| 110 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 111 | 5 * (1 << shift)); |
| 112 | u8 basic = 0; |
| 113 | if (!(rates & BIT(ri))) |
| 114 | continue; |
| 115 | |
| 116 | if (basic_rates & BIT(ri)) |
| 117 | basic = 0x80; |
| 118 | *pos++ = basic | (u8) rate; |
| 119 | if (++rates_added == 8) { |
| 120 | ri++; /* continue at next rate for EXT_SUPP_RATES */ |
| 121 | break; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | if (sband->band == IEEE80211_BAND_2GHZ) { |
| 126 | *pos++ = WLAN_EID_DS_PARAMS; |
| 127 | *pos++ = 1; |
| 128 | *pos++ = ieee80211_frequency_to_channel( |
| 129 | chandef->chan->center_freq); |
| 130 | } |
| 131 | |
| 132 | *pos++ = WLAN_EID_IBSS_PARAMS; |
| 133 | *pos++ = 2; |
| 134 | /* FIX: set ATIM window based on scan results */ |
| 135 | *pos++ = 0; |
| 136 | *pos++ = 0; |
| 137 | |
| 138 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
| 139 | if (rates_n > 8) { |
| 140 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 141 | *pos++ = rates_n - 8; |
| 142 | for (; ri < sband->n_bitrates; ri++) { |
| 143 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 144 | 5 * (1 << shift)); |
| 145 | u8 basic = 0; |
| 146 | if (!(rates & BIT(ri))) |
| 147 | continue; |
| 148 | |
| 149 | if (basic_rates & BIT(ri)) |
| 150 | basic = 0x80; |
| 151 | *pos++ = basic | (u8) rate; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | if (ifibss->ie_len) { |
| 156 | memcpy(pos, ifibss->ie, ifibss->ie_len); |
| 157 | pos += ifibss->ie_len; |
| 158 | } |
| 159 | |
| 160 | /* add HT capability and information IEs */ |
| 161 | if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT && |
| 162 | chandef->width != NL80211_CHAN_WIDTH_5 && |
| 163 | chandef->width != NL80211_CHAN_WIDTH_10 && |
| 164 | sband->ht_cap.ht_supported) { |
| 165 | struct ieee80211_sta_ht_cap ht_cap; |
| 166 | |
| 167 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
| 168 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
| 169 | |
| 170 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); |
| 171 | /* |
| 172 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection |
| 173 | * field and RIFS Mode are reserved in IBSS mode, therefore |
| 174 | * keep them at 0 |
| 175 | */ |
| 176 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
| 177 | chandef, 0); |
| 178 | } |
| 179 | |
| 180 | if (local->hw.queues >= IEEE80211_NUM_ACS) { |
| 181 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; |
| 182 | *pos++ = 7; /* len */ |
| 183 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ |
| 184 | *pos++ = 0x50; |
| 185 | *pos++ = 0xf2; |
| 186 | *pos++ = 2; /* WME */ |
| 187 | *pos++ = 0; /* WME info */ |
| 188 | *pos++ = 1; /* WME ver */ |
| 189 | *pos++ = 0; /* U-APSD no in use */ |
| 190 | } |
| 191 | |
| 192 | presp->head_len = pos - presp->head; |
| 193 | if (WARN_ON(presp->head_len > frame_len)) |
| 194 | goto error; |
| 195 | |
| 196 | return presp; |
| 197 | error: |
| 198 | kfree(presp); |
| 199 | return NULL; |
| 200 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 201 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 202 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 203 | const u8 *bssid, const int beacon_int, |
| 204 | struct ieee80211_channel *chan, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 205 | const u32 basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 206 | const u16 capability, u64 tsf, |
| 207 | bool creator) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 208 | { |
| 209 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 210 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 211 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame^] | 212 | struct ieee80211_mgmt *mgmt; |
Johannes Berg | f446d10 | 2009-10-28 15:12:32 +0100 | [diff] [blame] | 213 | struct cfg80211_bss *bss; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame^] | 214 | u32 bss_change; |
Johannes Berg | 683b6d3 | 2012-11-08 21:25:48 +0100 | [diff] [blame] | 215 | struct cfg80211_chan_def chandef; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 216 | struct beacon_data *presp; |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame^] | 217 | enum nl80211_bss_scan_width scan_width; |
| 218 | bool have_higher_than_11mbit; |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 219 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 220 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 221 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 222 | /* Reset own TSF to allow time synchronization work. */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 223 | drv_reset_tsf(local, sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 224 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 225 | if (!ether_addr_equal(ifibss->bssid, bssid)) |
Johannes Berg | b998e8b | 2012-12-13 23:07:46 +0100 | [diff] [blame] | 226 | sta_info_flush(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 227 | |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 228 | /* if merging, indicate to driver that we leave the old IBSS */ |
| 229 | if (sdata->vif.bss_conf.ibss_joined) { |
| 230 | sdata->vif.bss_conf.ibss_joined = false; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 231 | sdata->vif.bss_conf.ibss_creator = false; |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 232 | sdata->vif.bss_conf.enable_beacon = false; |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 233 | netif_carrier_off(sdata->dev); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 234 | ieee80211_bss_info_change_notify(sdata, |
| 235 | BSS_CHANGED_IBSS | |
| 236 | BSS_CHANGED_BEACON_ENABLED); |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 237 | } |
| 238 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 239 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 240 | lockdep_is_held(&sdata->wdev.mtx)); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 241 | rcu_assign_pointer(ifibss->presp, NULL); |
| 242 | if (presp) |
| 243 | kfree_rcu(presp, rcu_head); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 244 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 245 | sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 246 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 247 | chandef = ifibss->chandef; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 248 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { |
Simon Wunderlich | 4b42aab | 2013-07-08 16:55:57 +0200 | [diff] [blame] | 249 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
| 250 | chandef.width == NL80211_CHAN_WIDTH_10 || |
| 251 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
| 252 | chandef.width == NL80211_CHAN_WIDTH_20) { |
| 253 | sdata_info(sdata, |
| 254 | "Failed to join IBSS, beacons forbidden\n"); |
| 255 | return; |
| 256 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 257 | chandef.width = NL80211_CHAN_WIDTH_20; |
| 258 | chandef.center_freq1 = chan->center_freq; |
| 259 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 260 | |
| 261 | ieee80211_vif_release_channel(sdata); |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 262 | if (ieee80211_vif_use_channel(sdata, &chandef, |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 263 | ifibss->fixed_channel ? |
| 264 | IEEE80211_CHANCTX_SHARED : |
| 265 | IEEE80211_CHANCTX_EXCLUSIVE)) { |
| 266 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); |
| 267 | return; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 268 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 269 | |
| 270 | memcpy(ifibss->bssid, bssid, ETH_ALEN); |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 271 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 272 | sband = local->hw.wiphy->bands[chan->band]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 273 | |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame^] | 274 | presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, |
| 275 | capability, tsf, &chandef, |
| 276 | &have_higher_than_11mbit); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 277 | if (!presp) |
| 278 | return; |
| 279 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 280 | rcu_assign_pointer(ifibss->presp, presp); |
Simon Wunderlich | d51b70f | 2013-08-09 16:35:17 +0200 | [diff] [blame^] | 281 | mgmt = (void *)presp->head; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 282 | |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 283 | sdata->vif.bss_conf.enable_beacon = true; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 284 | sdata->vif.bss_conf.beacon_int = beacon_int; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 285 | sdata->vif.bss_conf.basic_rates = basic_rates; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 286 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
| 287 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 288 | bss_change = BSS_CHANGED_BEACON_INT; |
| 289 | bss_change |= ieee80211_reset_erp_info(sdata); |
| 290 | bss_change |= BSS_CHANGED_BSSID; |
| 291 | bss_change |= BSS_CHANGED_BEACON; |
| 292 | bss_change |= BSS_CHANGED_BEACON_ENABLED; |
Teemu Paasikivi | 392cfdb | 2010-06-14 12:55:32 +0300 | [diff] [blame] | 293 | bss_change |= BSS_CHANGED_BASIC_RATES; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 294 | bss_change |= BSS_CHANGED_HT; |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 295 | bss_change |= BSS_CHANGED_IBSS; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 296 | bss_change |= BSS_CHANGED_SSID; |
Simon Wunderlich | 2f91a96 | 2012-12-03 22:21:30 +0100 | [diff] [blame] | 297 | |
| 298 | /* |
| 299 | * In 5 GHz/802.11a, we can always use short slot time. |
| 300 | * (IEEE 802.11-2012 18.3.8.7) |
| 301 | * |
| 302 | * In 2.4GHz, we must always use long slots in IBSS for compatibility |
| 303 | * reasons. |
| 304 | * (IEEE 802.11-2012 19.4.5) |
| 305 | * |
| 306 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) |
| 307 | */ |
| 308 | sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; |
| 309 | bss_change |= BSS_CHANGED_ERP_SLOT; |
| 310 | |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 311 | /* cf. IEEE 802.11 9.2.12 */ |
| 312 | if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit) |
| 313 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| 314 | else |
| 315 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| 316 | |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 317 | sdata->vif.bss_conf.ibss_joined = true; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 318 | sdata->vif.bss_conf.ibss_creator = creator; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 319 | ieee80211_bss_info_change_notify(sdata, bss_change); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 320 | |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 321 | ieee80211_set_wmm_default(sdata, true); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 322 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 323 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 324 | mod_timer(&ifibss->timer, |
| 325 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 326 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 327 | scan_width = cfg80211_chandef_to_scan_width(&chandef); |
| 328 | bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan, |
| 329 | scan_width, mgmt, |
| 330 | presp->head_len, 0, GFP_KERNEL); |
Johannes Berg | 5b112d3 | 2013-02-01 01:49:58 +0100 | [diff] [blame] | 331 | cfg80211_put_bss(local->hw.wiphy, bss); |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 332 | netif_carrier_on(sdata->dev); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 333 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 334 | } |
| 335 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 336 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 337 | struct ieee80211_bss *bss) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 338 | { |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 339 | struct cfg80211_bss *cbss = |
| 340 | container_of((void *)bss, struct cfg80211_bss, priv); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 341 | struct ieee80211_supported_band *sband; |
| 342 | u32 basic_rates; |
| 343 | int i, j; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 344 | u16 beacon_int = cbss->beacon_interval; |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 345 | const struct cfg80211_bss_ies *ies; |
| 346 | u64 tsf; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 347 | u32 rate_flags; |
| 348 | int shift; |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 349 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 350 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 351 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 352 | if (beacon_int < 10) |
| 353 | beacon_int = 10; |
| 354 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 355 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 356 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
| 357 | shift = ieee80211_vif_get_shift(&sdata->vif); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 358 | |
| 359 | basic_rates = 0; |
| 360 | |
| 361 | for (i = 0; i < bss->supp_rates_len; i++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 362 | int rate = bss->supp_rates[i] & 0x7f; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 363 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
| 364 | |
| 365 | for (j = 0; j < sband->n_bitrates; j++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 366 | int brate; |
| 367 | if ((rate_flags & sband->bitrates[j].flags) |
| 368 | != rate_flags) |
| 369 | continue; |
| 370 | |
| 371 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, |
| 372 | 5 * (1 << shift)); |
| 373 | if (brate == rate) { |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 374 | if (is_basic) |
| 375 | basic_rates |= BIT(j); |
| 376 | break; |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 381 | rcu_read_lock(); |
| 382 | ies = rcu_dereference(cbss->ies); |
| 383 | tsf = ies->tsf; |
| 384 | rcu_read_unlock(); |
| 385 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 386 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 387 | beacon_int, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 388 | cbss->channel, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 389 | basic_rates, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 390 | cbss->capability, |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 391 | tsf, false); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 392 | } |
| 393 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 394 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 395 | __acquires(RCU) |
| 396 | { |
| 397 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 398 | u8 addr[ETH_ALEN]; |
| 399 | |
| 400 | memcpy(addr, sta->sta.addr, ETH_ALEN); |
| 401 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 402 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 403 | |
Johannes Berg | 83d5cc0 | 2012-01-12 09:31:10 +0100 | [diff] [blame] | 404 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
| 405 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 406 | /* authorize the station only if the network is not RSN protected. If |
| 407 | * not wait for the userspace to authorize it */ |
| 408 | if (!sta->sdata->u.ibss.control_port) |
| 409 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 410 | |
| 411 | rate_control_rate_init(sta); |
| 412 | |
| 413 | /* If it fails, maybe we raced another insertion? */ |
| 414 | if (sta_info_insert_rcu(sta)) |
| 415 | return sta_info_get(sdata, addr); |
| 416 | return sta; |
| 417 | } |
| 418 | |
| 419 | static struct sta_info * |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 420 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
| 421 | const u8 *addr, u32 supp_rates) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 422 | __acquires(RCU) |
| 423 | { |
| 424 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 425 | struct ieee80211_local *local = sdata->local; |
| 426 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 427 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 428 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 429 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 430 | int band; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 431 | |
| 432 | /* |
| 433 | * XXX: Consider removing the least recently used entry and |
| 434 | * allow new one to be added. |
| 435 | */ |
| 436 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 437 | 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] | 438 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 439 | rcu_read_lock(); |
| 440 | return NULL; |
| 441 | } |
| 442 | |
| 443 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { |
| 444 | rcu_read_lock(); |
| 445 | return NULL; |
| 446 | } |
| 447 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 448 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 449 | rcu_read_lock(); |
| 450 | return NULL; |
| 451 | } |
| 452 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 453 | rcu_read_lock(); |
| 454 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 455 | if (WARN_ON_ONCE(!chanctx_conf)) |
| 456 | return NULL; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 457 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 458 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 459 | rcu_read_unlock(); |
| 460 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 461 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
| 462 | if (!sta) { |
| 463 | rcu_read_lock(); |
| 464 | return NULL; |
| 465 | } |
| 466 | |
| 467 | sta->last_rx = jiffies; |
| 468 | |
| 469 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 470 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 471 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 472 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 473 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 474 | return ieee80211_ibss_finish_sta(sta); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 475 | } |
| 476 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 477 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
| 478 | struct ieee80211_mgmt *mgmt, |
| 479 | size_t len) |
| 480 | { |
| 481 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); |
| 482 | |
| 483 | if (len < IEEE80211_DEAUTH_FRAME_LEN) |
| 484 | return; |
| 485 | |
| 486 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", |
| 487 | mgmt->sa, mgmt->da, mgmt->bssid, reason); |
| 488 | sta_info_destroy_addr(sdata, mgmt->sa); |
| 489 | } |
| 490 | |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 491 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
| 492 | struct ieee80211_mgmt *mgmt, |
| 493 | size_t len) |
| 494 | { |
| 495 | u16 auth_alg, auth_transaction; |
| 496 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 497 | sdata_assert_lock(sdata); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 498 | |
| 499 | if (len < 24 + 6) |
| 500 | return; |
| 501 | |
| 502 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
| 503 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
| 504 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 505 | ibss_dbg(sdata, |
| 506 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", |
| 507 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); |
Antonio Quartulli | 7bed205 | 2012-11-25 23:24:27 +0100 | [diff] [blame] | 508 | |
| 509 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
| 510 | return; |
| 511 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 512 | /* |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 513 | * IEEE 802.11 standard does not require authentication in IBSS |
| 514 | * networks and most implementations do not seem to use it. |
| 515 | * However, try to reply to authentication attempts if someone |
| 516 | * has actually implemented this. |
| 517 | */ |
Jouni Malinen | 700e8ea | 2012-09-30 19:29:37 +0300 | [diff] [blame] | 518 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
Johannes Berg | 1672c0e3 | 2013-01-29 15:02:27 +0100 | [diff] [blame] | 519 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 520 | } |
| 521 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 522 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 523 | struct ieee80211_mgmt *mgmt, size_t len, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 524 | struct ieee80211_rx_status *rx_status, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 525 | struct ieee802_11_elems *elems) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 526 | { |
| 527 | struct ieee80211_local *local = sdata->local; |
| 528 | int freq; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 529 | struct cfg80211_bss *cbss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 530 | struct ieee80211_bss *bss; |
| 531 | struct sta_info *sta; |
| 532 | struct ieee80211_channel *channel; |
| 533 | u64 beacon_timestamp, rx_timestamp; |
| 534 | u32 supp_rates = 0; |
| 535 | enum ieee80211_band band = rx_status->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 536 | enum nl80211_bss_scan_width scan_width; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 537 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
| 538 | bool rates_updated = false; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 539 | |
Johannes Berg | 1cd8e88 | 2013-03-27 14:30:12 +0100 | [diff] [blame] | 540 | if (elems->ds_params) |
Bruno Randolf | 59eb21a | 2011-01-17 13:37:28 +0900 | [diff] [blame] | 541 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
| 542 | band); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 543 | else |
| 544 | freq = rx_status->freq; |
| 545 | |
| 546 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| 547 | |
| 548 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 549 | return; |
| 550 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 551 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 552 | ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 553 | |
| 554 | rcu_read_lock(); |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 555 | sta = sta_info_get(sdata, mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 556 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 557 | if (elems->supp_rates) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 558 | supp_rates = ieee80211_sta_get_rates(sdata, elems, |
Ashok Nagarajan | 9ebb61a | 2012-04-02 21:21:21 -0700 | [diff] [blame] | 559 | band, NULL); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 560 | if (sta) { |
| 561 | u32 prev_rates; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 562 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 563 | prev_rates = sta->sta.supp_rates[band]; |
| 564 | /* make sure mandatory rates are always added */ |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 565 | scan_width = NL80211_BSS_CHAN_WIDTH_20; |
| 566 | if (rx_status->flag & RX_FLAG_5MHZ) |
| 567 | scan_width = NL80211_BSS_CHAN_WIDTH_5; |
| 568 | if (rx_status->flag & RX_FLAG_10MHZ) |
| 569 | scan_width = NL80211_BSS_CHAN_WIDTH_10; |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 570 | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 571 | sta->sta.supp_rates[band] = supp_rates | |
| 572 | ieee80211_mandatory_rates(sband, |
| 573 | scan_width); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 574 | if (sta->sta.supp_rates[band] != prev_rates) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 575 | ibss_dbg(sdata, |
| 576 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", |
| 577 | sta->sta.addr, prev_rates, |
| 578 | sta->sta.supp_rates[band]); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 579 | rates_updated = true; |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 580 | } |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 581 | } else { |
| 582 | rcu_read_unlock(); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 583 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 584 | mgmt->sa, supp_rates); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 585 | } |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 586 | } |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 587 | |
| 588 | if (sta && elems->wmm_info) |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 589 | set_sta_flag(sta, WLAN_STA_WME); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 590 | |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 591 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 592 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && |
| 593 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && |
| 594 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 595 | /* we both use HT */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 596 | struct ieee80211_ht_cap htcap_ie; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 597 | struct cfg80211_chan_def chandef; |
| 598 | |
| 599 | ieee80211_ht_oper_to_chandef(channel, |
| 600 | elems->ht_operation, |
| 601 | &chandef); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 602 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 603 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 604 | |
| 605 | /* |
| 606 | * fall back to HT20 if we don't use or use |
| 607 | * the other extension channel |
| 608 | */ |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 609 | if (chandef.center_freq1 != |
| 610 | sdata->u.ibss.chandef.center_freq1) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 611 | htcap_ie.cap_info &= |
| 612 | cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 613 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 614 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap( |
| 615 | sdata, sband, &htcap_ie, sta); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 616 | } |
| 617 | |
Antonio Quartulli | e687f61 | 2012-08-12 18:24:55 +0200 | [diff] [blame] | 618 | if (sta && rates_updated) { |
| 619 | drv_sta_rc_update(local, sdata, &sta->sta, |
| 620 | IEEE80211_RC_SUPP_RATES_CHANGED); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 621 | rate_control_rate_init(sta); |
Antonio Quartulli | e687f61 | 2012-08-12 18:24:55 +0200 | [diff] [blame] | 622 | } |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 623 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 624 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 625 | } |
| 626 | |
| 627 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 628 | channel); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 629 | if (!bss) |
| 630 | return; |
| 631 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 632 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
| 633 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 634 | /* same for beacon and probe response */ |
| 635 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 636 | |
| 637 | /* check if we need to merge IBSS */ |
| 638 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 639 | /* we use a fixed BSSID */ |
Benoit Papillault | a98bfec | 2010-01-17 22:45:24 +0100 | [diff] [blame] | 640 | if (sdata->u.ibss.fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 641 | goto put_bss; |
| 642 | |
| 643 | /* not an IBSS */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 644 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 645 | goto put_bss; |
| 646 | |
| 647 | /* different channel */ |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 648 | if (sdata->u.ibss.fixed_channel && |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 649 | sdata->u.ibss.chandef.chan != cbss->channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 650 | goto put_bss; |
| 651 | |
| 652 | /* different SSID */ |
| 653 | if (elems->ssid_len != sdata->u.ibss.ssid_len || |
| 654 | memcmp(elems->ssid, sdata->u.ibss.ssid, |
| 655 | sdata->u.ibss.ssid_len)) |
| 656 | goto put_bss; |
| 657 | |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 658 | /* same BSSID */ |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 659 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 660 | goto put_bss; |
| 661 | |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 662 | if (ieee80211_have_rx_timestamp(rx_status)) { |
| 663 | /* time when timestamp field was received */ |
| 664 | rx_timestamp = |
| 665 | ieee80211_calculate_rx_timestamp(local, rx_status, |
| 666 | len + FCS_LEN, 24); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 667 | } else { |
| 668 | /* |
| 669 | * second best option: get current TSF |
| 670 | * (will return -1 if not supported) |
| 671 | */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 672 | rx_timestamp = drv_get_tsf(local, sdata); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 673 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 674 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 675 | ibss_dbg(sdata, |
| 676 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", |
| 677 | mgmt->sa, mgmt->bssid, |
| 678 | (unsigned long long)rx_timestamp, |
| 679 | (unsigned long long)beacon_timestamp, |
| 680 | (unsigned long long)(rx_timestamp - beacon_timestamp), |
| 681 | jiffies); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 682 | |
| 683 | if (beacon_timestamp > rx_timestamp) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 684 | ibss_dbg(sdata, |
| 685 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", |
| 686 | mgmt->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 687 | ieee80211_sta_join_ibss(sdata, bss); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 688 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 689 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 690 | supp_rates); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 691 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | put_bss: |
| 695 | ieee80211_rx_bss_put(local, bss); |
| 696 | } |
| 697 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 698 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
| 699 | const u8 *bssid, const u8 *addr, |
| 700 | u32 supp_rates) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 701 | { |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 702 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 703 | struct ieee80211_local *local = sdata->local; |
| 704 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 705 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 706 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 707 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 708 | int band; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 709 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 710 | /* |
| 711 | * XXX: Consider removing the least recently used entry and |
| 712 | * allow new one to be added. |
| 713 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 714 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 715 | 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] | 716 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 717 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 718 | } |
| 719 | |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 720 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 721 | return; |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 722 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 723 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 724 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 725 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 726 | rcu_read_lock(); |
| 727 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 728 | if (WARN_ON_ONCE(!chanctx_conf)) { |
| 729 | rcu_read_unlock(); |
| 730 | return; |
| 731 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 732 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 733 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 734 | rcu_read_unlock(); |
| 735 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 736 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 737 | if (!sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 738 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 739 | |
Rajkumar Manoharan | c8716d9 | 2010-10-23 10:59:57 +0530 | [diff] [blame] | 740 | sta->last_rx = jiffies; |
Johannes Berg | d9a7ddb | 2011-12-14 12:35:30 +0100 | [diff] [blame] | 741 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 742 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 743 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 744 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 745 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 746 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 747 | spin_lock(&ifibss->incomplete_lock); |
| 748 | list_add(&sta->list, &ifibss->incomplete_stations); |
| 749 | spin_unlock(&ifibss->incomplete_lock); |
| 750 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 751 | } |
| 752 | |
| 753 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
| 754 | { |
| 755 | struct ieee80211_local *local = sdata->local; |
| 756 | int active = 0; |
| 757 | struct sta_info *sta; |
| 758 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 759 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 760 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 761 | rcu_read_lock(); |
| 762 | |
| 763 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 764 | if (sta->sdata == sdata && |
| 765 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
| 766 | jiffies)) { |
| 767 | active++; |
| 768 | break; |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | rcu_read_unlock(); |
| 773 | |
| 774 | return active; |
| 775 | } |
| 776 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 777 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
| 778 | { |
| 779 | struct ieee80211_local *local = sdata->local; |
| 780 | struct sta_info *sta, *tmp; |
| 781 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; |
| 782 | unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
| 783 | |
| 784 | mutex_lock(&local->sta_mtx); |
| 785 | |
| 786 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
| 787 | if (sdata != sta->sdata) |
| 788 | continue; |
| 789 | |
| 790 | if (time_after(jiffies, sta->last_rx + exp_time) || |
| 791 | (time_after(jiffies, sta->last_rx + exp_rsn_time) && |
| 792 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
| 793 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", |
| 794 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? |
| 795 | "not authorized " : "", sta->sta.addr); |
| 796 | |
| 797 | WARN_ON(__sta_info_destroy(sta)); |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | mutex_unlock(&local->sta_mtx); |
| 802 | } |
| 803 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 804 | /* |
| 805 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED |
| 806 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 807 | |
| 808 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) |
| 809 | { |
| 810 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 811 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 812 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 813 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 814 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 815 | mod_timer(&ifibss->timer, |
| 816 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 817 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 818 | ieee80211_ibss_sta_expire(sdata); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 819 | |
Sujith | 450aae3 | 2009-11-02 12:33:23 +0530 | [diff] [blame] | 820 | if (time_before(jiffies, ifibss->last_scan_completed + |
| 821 | IEEE80211_IBSS_MERGE_INTERVAL)) |
| 822 | return; |
| 823 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 824 | if (ieee80211_sta_active_ibss(sdata)) |
| 825 | return; |
| 826 | |
John W. Linville | c037b83 | 2012-01-30 15:28:11 -0500 | [diff] [blame] | 827 | if (ifibss->fixed_channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 828 | return; |
| 829 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 830 | sdata_info(sdata, |
| 831 | "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] | 832 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 833 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 834 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 835 | NULL, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 836 | } |
| 837 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 838 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 839 | { |
| 840 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 841 | u8 bssid[ETH_ALEN]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 842 | u16 capability; |
| 843 | int i; |
| 844 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 845 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 846 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 847 | if (ifibss->fixed_bssid) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 848 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
| 849 | } else { |
| 850 | /* Generate random, not broadcast, locally administered BSSID. Mix in |
| 851 | * own MAC address to make sure that devices that do not have proper |
| 852 | * random number generator get different BSSID. */ |
| 853 | get_random_bytes(bssid, ETH_ALEN); |
| 854 | for (i = 0; i < ETH_ALEN; i++) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 855 | bssid[i] ^= sdata->vif.addr[i]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 856 | bssid[0] &= ~0x01; |
| 857 | bssid[0] |= 0x02; |
| 858 | } |
| 859 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 860 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 861 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 862 | capability = WLAN_CAPABILITY_IBSS; |
| 863 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 864 | if (ifibss->privacy) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 865 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 866 | else |
| 867 | sdata->drop_unencrypted = 0; |
| 868 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 869 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 870 | ifibss->chandef.chan, ifibss->basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 871 | capability, 0, true); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 872 | } |
| 873 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 874 | /* |
| 875 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH |
| 876 | */ |
| 877 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 878 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 879 | { |
| 880 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 881 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 882 | struct cfg80211_bss *cbss; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 883 | struct ieee80211_channel *chan = NULL; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 884 | const u8 *bssid = NULL; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 885 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 886 | int active_ibss; |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 887 | u16 capability; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 888 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 889 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 890 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 891 | active_ibss = ieee80211_sta_active_ibss(sdata); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 892 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 893 | |
| 894 | if (active_ibss) |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 895 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 896 | |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 897 | capability = WLAN_CAPABILITY_IBSS; |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 898 | if (ifibss->privacy) |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 899 | capability |= WLAN_CAPABILITY_PRIVACY; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 900 | if (ifibss->fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 901 | bssid = ifibss->bssid; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 902 | if (ifibss->fixed_channel) |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 903 | chan = ifibss->chandef.chan; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 904 | if (!is_zero_ether_addr(ifibss->bssid)) |
| 905 | bssid = ifibss->bssid; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 906 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
| 907 | ifibss->ssid, ifibss->ssid_len, |
| 908 | WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, |
| 909 | capability); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 910 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 911 | if (cbss) { |
| 912 | struct ieee80211_bss *bss; |
| 913 | |
| 914 | bss = (void *)cbss->priv; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 915 | ibss_dbg(sdata, |
| 916 | "sta_find_ibss: selected %pM current %pM\n", |
| 917 | cbss->bssid, ifibss->bssid); |
| 918 | sdata_info(sdata, |
| 919 | "Selected IBSS BSSID %pM based on configured SSID\n", |
| 920 | cbss->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 921 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 922 | ieee80211_sta_join_ibss(sdata, bss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 923 | ieee80211_rx_bss_put(local, bss); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 924 | return; |
Reinette Chatre | d419b9f | 2009-10-19 14:55:37 -0700 | [diff] [blame] | 925 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 926 | |
Antonio Quartulli | d8eb741 | 2013-08-09 18:58:32 +0200 | [diff] [blame] | 927 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
| 928 | * directly and do not waste time scanning |
| 929 | */ |
| 930 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { |
| 931 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", |
| 932 | bssid); |
| 933 | ieee80211_sta_create_ibss(sdata); |
| 934 | return; |
| 935 | } |
| 936 | |
| 937 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 938 | 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] | 939 | |
| 940 | /* Selected IBSS not found in current scan results - try to scan */ |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 941 | if (time_after(jiffies, ifibss->last_scan_completed + |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 942 | IEEE80211_SCAN_INTERVAL)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 943 | 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] | 944 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 945 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 946 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 947 | ifibss->ssid_len, chan, |
| 948 | scan_width); |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 949 | } else { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 950 | int interval = IEEE80211_SCAN_INTERVAL; |
| 951 | |
| 952 | if (time_after(jiffies, ifibss->ibss_join_req + |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 953 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
| 954 | ieee80211_sta_create_ibss(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 955 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 956 | mod_timer(&ifibss->timer, |
| 957 | round_jiffies(jiffies + interval)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 958 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | 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] | 962 | struct sk_buff *req) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 963 | { |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 964 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 965 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 966 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 967 | int tx_last_beacon, len = req->len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 968 | struct sk_buff *skb; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 969 | struct beacon_data *presp; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 970 | u8 *pos, *end; |
| 971 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 972 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 973 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 974 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 975 | lockdep_is_held(&sdata->wdev.mtx)); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 976 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 977 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 978 | len < 24 + 2 || !presp) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 979 | return; |
| 980 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 981 | tx_last_beacon = drv_tx_last_beacon(local); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 982 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 983 | ibss_dbg(sdata, |
| 984 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", |
| 985 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 986 | |
Felix Fietkau | 1ed7648 | 2011-03-24 19:46:18 +0100 | [diff] [blame] | 987 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 988 | return; |
| 989 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 990 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
Felix Fietkau | 888d04d | 2012-03-01 15:22:09 +0100 | [diff] [blame] | 991 | !is_broadcast_ether_addr(mgmt->bssid)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 992 | return; |
| 993 | |
| 994 | end = ((u8 *) mgmt) + len; |
| 995 | pos = mgmt->u.probe_req.variable; |
| 996 | if (pos[0] != WLAN_EID_SSID || |
| 997 | pos + 2 + pos[1] > end) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 998 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
| 999 | mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1000 | return; |
| 1001 | } |
| 1002 | if (pos[1] != 0 && |
| 1003 | (pos[1] != ifibss->ssid_len || |
Benoit Papillault | 0da780c | 2010-02-05 01:21:03 +0100 | [diff] [blame] | 1004 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1005 | /* Ignore ProbeReq for foreign SSID */ |
| 1006 | return; |
| 1007 | } |
| 1008 | |
| 1009 | /* Reply with ProbeResp */ |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1010 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1011 | if (!skb) |
| 1012 | return; |
| 1013 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1014 | skb_reserve(skb, local->tx_headroom); |
| 1015 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); |
| 1016 | |
| 1017 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); |
| 1018 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 1019 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 1020 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1021 | } |
| 1022 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1023 | static |
| 1024 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, |
| 1025 | struct ieee80211_mgmt *mgmt, size_t len, |
| 1026 | struct ieee80211_rx_status *rx_status) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1027 | { |
| 1028 | size_t baselen; |
| 1029 | struct ieee802_11_elems elems; |
| 1030 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1031 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
| 1032 | offsetof(typeof(mgmt->u.beacon), variable)); |
| 1033 | |
| 1034 | /* |
| 1035 | * either beacon or probe_resp but the variable field is at the |
| 1036 | * same offset |
| 1037 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1038 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 1039 | if (baselen > len) |
| 1040 | return; |
| 1041 | |
| 1042 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
Johannes Berg | b2e506b | 2013-03-26 14:54:16 +0100 | [diff] [blame] | 1043 | false, &elems); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1044 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1045 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1046 | } |
| 1047 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1048 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 1049 | struct sk_buff *skb) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1050 | { |
| 1051 | struct ieee80211_rx_status *rx_status; |
| 1052 | struct ieee80211_mgmt *mgmt; |
| 1053 | u16 fc; |
| 1054 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 1055 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1056 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 1057 | fc = le16_to_cpu(mgmt->frame_control); |
| 1058 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1059 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1060 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1061 | if (!sdata->u.ibss.ssid_len) |
| 1062 | goto mgmt_out; /* not ready to merge yet */ |
| 1063 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1064 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 1065 | case IEEE80211_STYPE_PROBE_REQ: |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1066 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1067 | break; |
| 1068 | case IEEE80211_STYPE_PROBE_RESP: |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1069 | case IEEE80211_STYPE_BEACON: |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1070 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
| 1071 | rx_status); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1072 | break; |
| 1073 | case IEEE80211_STYPE_AUTH: |
| 1074 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); |
| 1075 | break; |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 1076 | case IEEE80211_STYPE_DEAUTH: |
| 1077 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); |
| 1078 | break; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1079 | } |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1080 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1081 | mgmt_out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1082 | sdata_unlock(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1083 | } |
| 1084 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1085 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1086 | { |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1087 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1088 | struct sta_info *sta; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1089 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1090 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1091 | |
| 1092 | /* |
| 1093 | * Work could be scheduled after scan or similar |
| 1094 | * when we aren't even joined (or trying) with a |
| 1095 | * network. |
| 1096 | */ |
| 1097 | if (!ifibss->ssid_len) |
| 1098 | goto out; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1099 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1100 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1101 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 1102 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 1103 | struct sta_info, list); |
| 1104 | list_del(&sta->list); |
| 1105 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1106 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 1107 | ieee80211_ibss_finish_sta(sta); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1108 | rcu_read_unlock(); |
| 1109 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1110 | } |
| 1111 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1112 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1113 | switch (ifibss->state) { |
| 1114 | case IEEE80211_IBSS_MLME_SEARCH: |
| 1115 | ieee80211_sta_find_ibss(sdata); |
| 1116 | break; |
| 1117 | case IEEE80211_IBSS_MLME_JOINED: |
| 1118 | ieee80211_sta_merge_ibss(sdata); |
| 1119 | break; |
| 1120 | default: |
| 1121 | WARN_ON(1); |
| 1122 | break; |
| 1123 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1124 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1125 | out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1126 | sdata_unlock(sdata); |
Johannes Berg | 3a4d4aa | 2010-05-26 16:41:40 +0200 | [diff] [blame] | 1127 | } |
| 1128 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1129 | static void ieee80211_ibss_timer(unsigned long data) |
| 1130 | { |
| 1131 | struct ieee80211_sub_if_data *sdata = |
| 1132 | (struct ieee80211_sub_if_data *) data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1133 | |
Stanislaw Gruszka | a618294 | 2013-02-28 10:55:28 +0100 | [diff] [blame] | 1134 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1135 | } |
| 1136 | |
| 1137 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
| 1138 | { |
| 1139 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1140 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1141 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
| 1142 | (unsigned long) sdata); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1143 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
| 1144 | spin_lock_init(&ifibss->incomplete_lock); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1145 | } |
| 1146 | |
| 1147 | /* scan finished notification */ |
| 1148 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) |
| 1149 | { |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1150 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1151 | |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1152 | mutex_lock(&local->iflist_mtx); |
| 1153 | list_for_each_entry(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 1154 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1155 | continue; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1156 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 1157 | continue; |
| 1158 | sdata->u.ibss.last_scan_completed = jiffies; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1159 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1160 | } |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1161 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1162 | } |
| 1163 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1164 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
| 1165 | struct cfg80211_ibss_params *params) |
| 1166 | { |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1167 | u32 changed = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1168 | u32 rate_flags; |
| 1169 | struct ieee80211_supported_band *sband; |
| 1170 | int i; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1171 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1172 | if (params->bssid) { |
| 1173 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); |
| 1174 | sdata->u.ibss.fixed_bssid = true; |
| 1175 | } else |
| 1176 | sdata->u.ibss.fixed_bssid = false; |
| 1177 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1178 | sdata->u.ibss.privacy = params->privacy; |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 1179 | sdata->u.ibss.control_port = params->control_port; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 1180 | sdata->u.ibss.basic_rates = params->basic_rates; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1181 | |
| 1182 | /* fix basic_rates if channel does not support these rates */ |
| 1183 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); |
| 1184 | sband = sdata->local->hw.wiphy->bands[params->chandef.chan->band]; |
| 1185 | for (i = 0; i < sband->n_bitrates; i++) { |
| 1186 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 1187 | sdata->u.ibss.basic_rates &= ~BIT(i); |
| 1188 | } |
Felix Fietkau | dd5b4cc | 2010-11-22 20:58:24 +0100 | [diff] [blame] | 1189 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
| 1190 | sizeof(params->mcast_rate)); |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1191 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1192 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
| 1193 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1194 | sdata->u.ibss.chandef = params->chandef; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1195 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
| 1196 | |
| 1197 | if (params->ie) { |
| 1198 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, |
| 1199 | GFP_KERNEL); |
| 1200 | if (sdata->u.ibss.ie) |
| 1201 | sdata->u.ibss.ie_len = params->ie_len; |
| 1202 | } |
| 1203 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1204 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
| 1205 | sdata->u.ibss.ibss_join_req = jiffies; |
| 1206 | |
Antonio Quartulli | badecb0 | 2012-10-26 18:54:25 +0200 | [diff] [blame] | 1207 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1208 | sdata->u.ibss.ssid_len = params->ssid_len; |
| 1209 | |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1210 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
| 1211 | sizeof(sdata->u.ibss.ht_capa)); |
| 1212 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, |
| 1213 | sizeof(sdata->u.ibss.ht_capa_mask)); |
| 1214 | |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1215 | /* |
| 1216 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is |
| 1217 | * reserved, but an HT STA shall protect HT transmissions as though |
| 1218 | * the HT Protection field were set to non-HT mixed mode. |
| 1219 | * |
| 1220 | * In an IBSS, the RIFS Mode field of the HT Operation element is |
| 1221 | * also reserved, but an HT STA shall operate as though this field |
| 1222 | * were set to 1. |
| 1223 | */ |
| 1224 | |
| 1225 | sdata->vif.bss_conf.ht_operation_mode |= |
| 1226 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
| 1227 | | IEEE80211_HT_PARAM_RIFS_MODE; |
| 1228 | |
| 1229 | changed |= BSS_CHANGED_HT; |
| 1230 | ieee80211_bss_info_change_notify(sdata, changed); |
| 1231 | |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 1232 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
| 1233 | sdata->needed_rx_chains = sdata->local->rx_chains; |
| 1234 | |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 1235 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1236 | |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) |
| 1241 | { |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1242 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1243 | struct ieee80211_local *local = sdata->local; |
| 1244 | struct cfg80211_bss *cbss; |
| 1245 | u16 capability; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1246 | int active_ibss; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1247 | struct sta_info *sta; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1248 | struct beacon_data *presp; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1249 | |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1250 | active_ibss = ieee80211_sta_active_ibss(sdata); |
| 1251 | |
| 1252 | if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { |
| 1253 | capability = WLAN_CAPABILITY_IBSS; |
| 1254 | |
| 1255 | if (ifibss->privacy) |
| 1256 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 1257 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1258 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1259 | ifibss->bssid, ifibss->ssid, |
| 1260 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | |
| 1261 | WLAN_CAPABILITY_PRIVACY, |
| 1262 | capability); |
| 1263 | |
| 1264 | if (cbss) { |
| 1265 | cfg80211_unlink_bss(local->hw.wiphy, cbss); |
Johannes Berg | 5b112d3 | 2013-02-01 01:49:58 +0100 | [diff] [blame] | 1266 | cfg80211_put_bss(local->hw.wiphy, cbss); |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1267 | } |
| 1268 | } |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1269 | |
Simon Wunderlich | b78a493 | 2012-11-13 18:43:03 +0100 | [diff] [blame] | 1270 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; |
| 1271 | memset(ifibss->bssid, 0, ETH_ALEN); |
| 1272 | ifibss->ssid_len = 0; |
| 1273 | |
Johannes Berg | b998e8b | 2012-12-13 23:07:46 +0100 | [diff] [blame] | 1274 | sta_info_flush(sdata); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1275 | |
| 1276 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1277 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 1278 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 1279 | struct sta_info, list); |
| 1280 | list_del(&sta->list); |
| 1281 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1282 | |
| 1283 | sta_info_free(local, sta); |
| 1284 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1285 | } |
| 1286 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1287 | |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 1288 | netif_carrier_off(sdata->dev); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1289 | |
| 1290 | /* remove beacon */ |
| 1291 | kfree(sdata->u.ibss.ie); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1292 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1293 | lockdep_is_held(&sdata->wdev.mtx)); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1294 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1295 | |
| 1296 | /* on the next join, re-program HT parameters */ |
| 1297 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); |
| 1298 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); |
| 1299 | |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 1300 | sdata->vif.bss_conf.ibss_joined = false; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 1301 | sdata->vif.bss_conf.ibss_creator = false; |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 1302 | sdata->vif.bss_conf.enable_beacon = false; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 1303 | sdata->vif.bss_conf.ssid_len = 0; |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 1304 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 1305 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | |
| 1306 | BSS_CHANGED_IBSS); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1307 | synchronize_rcu(); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1308 | kfree(presp); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1309 | |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 1310 | skb_queue_purge(&sdata->skb_queue); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1311 | |
Johannes Berg | bc05d19 | 2010-07-21 10:52:40 +0200 | [diff] [blame] | 1312 | del_timer_sync(&sdata->u.ibss.timer); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1313 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1314 | return 0; |
| 1315 | } |