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 | |
| 37 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 38 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 39 | const u8 *bssid, const int beacon_int, |
| 40 | struct ieee80211_channel *chan, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 41 | const u32 basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 42 | const u16 capability, u64 tsf, |
| 43 | bool creator) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 44 | { |
| 45 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 46 | struct ieee80211_local *local = sdata->local; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 47 | int rates_n = 0, i, ri; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 48 | struct ieee80211_mgmt *mgmt; |
| 49 | u8 *pos; |
| 50 | struct ieee80211_supported_band *sband; |
Johannes Berg | f446d10 | 2009-10-28 15:12:32 +0100 | [diff] [blame] | 51 | struct cfg80211_bss *bss; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 52 | u32 bss_change, rate_flags, rates = 0, rates_added = 0; |
Johannes Berg | 683b6d3 | 2012-11-08 21:25:48 +0100 | [diff] [blame] | 53 | struct cfg80211_chan_def chandef; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 54 | enum nl80211_bss_scan_width scan_width; |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 55 | bool have_higher_than_11mbit = false; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 56 | struct beacon_data *presp; |
| 57 | int frame_len; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 58 | int shift; |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 59 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 60 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 61 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 62 | /* Reset own TSF to allow time synchronization work. */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 63 | drv_reset_tsf(local, sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 64 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 65 | if (!ether_addr_equal(ifibss->bssid, bssid)) |
Johannes Berg | b998e8b | 2012-12-13 23:07:46 +0100 | [diff] [blame] | 66 | sta_info_flush(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 67 | |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 68 | /* if merging, indicate to driver that we leave the old IBSS */ |
| 69 | if (sdata->vif.bss_conf.ibss_joined) { |
| 70 | sdata->vif.bss_conf.ibss_joined = false; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 71 | sdata->vif.bss_conf.ibss_creator = false; |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 72 | sdata->vif.bss_conf.enable_beacon = false; |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 73 | netif_carrier_off(sdata->dev); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 74 | ieee80211_bss_info_change_notify(sdata, |
| 75 | BSS_CHANGED_IBSS | |
| 76 | BSS_CHANGED_BEACON_ENABLED); |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 77 | } |
| 78 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 79 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 80 | lockdep_is_held(&sdata->wdev.mtx)); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 81 | rcu_assign_pointer(ifibss->presp, NULL); |
| 82 | if (presp) |
| 83 | kfree_rcu(presp, rcu_head); |
Johannes Berg | 1852d40 | 2013-03-07 20:22:28 +0100 | [diff] [blame] | 84 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 85 | sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 86 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 87 | chandef = ifibss->chandef; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 88 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { |
Simon Wunderlich | 4b42aab | 2013-07-08 16:55:57 +0200 | [diff] [blame] | 89 | if (chandef.width == NL80211_CHAN_WIDTH_5 || |
| 90 | chandef.width == NL80211_CHAN_WIDTH_10 || |
| 91 | chandef.width == NL80211_CHAN_WIDTH_20_NOHT || |
| 92 | chandef.width == NL80211_CHAN_WIDTH_20) { |
| 93 | sdata_info(sdata, |
| 94 | "Failed to join IBSS, beacons forbidden\n"); |
| 95 | return; |
| 96 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 97 | chandef.width = NL80211_CHAN_WIDTH_20; |
| 98 | chandef.center_freq1 = chan->center_freq; |
| 99 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 100 | |
| 101 | ieee80211_vif_release_channel(sdata); |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 102 | if (ieee80211_vif_use_channel(sdata, &chandef, |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 103 | ifibss->fixed_channel ? |
| 104 | IEEE80211_CHANCTX_SHARED : |
| 105 | IEEE80211_CHANCTX_EXCLUSIVE)) { |
| 106 | sdata_info(sdata, "Failed to join IBSS, no channel context\n"); |
| 107 | return; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 108 | } |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 109 | |
| 110 | memcpy(ifibss->bssid, bssid, ETH_ALEN); |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 111 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 112 | sband = local->hw.wiphy->bands[chan->band]; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 113 | shift = ieee80211_vif_get_shift(&sdata->vif); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 114 | |
| 115 | /* Build IBSS probe response */ |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 116 | frame_len = sizeof(struct ieee80211_hdr_3addr) + |
| 117 | 12 /* struct ieee80211_mgmt.u.beacon */ + |
| 118 | 2 + IEEE80211_MAX_SSID_LEN /* max SSID */ + |
| 119 | 2 + 8 /* max Supported Rates */ + |
| 120 | 3 /* max DS params */ + |
| 121 | 4 /* IBSS params */ + |
| 122 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + |
| 123 | 2 + sizeof(struct ieee80211_ht_cap) + |
| 124 | 2 + sizeof(struct ieee80211_ht_operation) + |
| 125 | ifibss->ie_len; |
| 126 | presp = kzalloc(sizeof(*presp) + frame_len, GFP_KERNEL); |
| 127 | if (!presp) |
| 128 | return; |
| 129 | |
| 130 | presp->head = (void *)(presp + 1); |
| 131 | |
| 132 | mgmt = (void *) presp->head; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 133 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 134 | IEEE80211_STYPE_PROBE_RESP); |
Johannes Berg | e83e654 | 2012-07-13 16:23:07 +0200 | [diff] [blame] | 135 | eth_broadcast_addr(mgmt->da); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 136 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 137 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 138 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
Sujith | 707c1b4 | 2009-03-03 10:15:10 +0530 | [diff] [blame] | 139 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 140 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
| 141 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 142 | pos = (u8 *)mgmt + offsetof(struct ieee80211_mgmt, u.beacon.variable); |
| 143 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 144 | *pos++ = WLAN_EID_SSID; |
| 145 | *pos++ = ifibss->ssid_len; |
| 146 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 147 | pos += ifibss->ssid_len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 148 | |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 149 | rate_flags = ieee80211_chandef_rate_flags(&chandef); |
| 150 | for (i = 0; i < sband->n_bitrates; i++) { |
| 151 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 152 | continue; |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 153 | if (sband->bitrates[i].bitrate > 110) |
| 154 | have_higher_than_11mbit = true; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 155 | |
| 156 | rates |= BIT(i); |
| 157 | rates_n++; |
| 158 | } |
| 159 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 160 | *pos++ = WLAN_EID_SUPP_RATES; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 161 | *pos++ = min_t(int, 8, rates_n); |
| 162 | for (ri = 0; ri < sband->n_bitrates; ri++) { |
| 163 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 164 | 5 * (1 << shift)); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 165 | u8 basic = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 166 | if (!(rates & BIT(ri))) |
| 167 | continue; |
| 168 | |
| 169 | if (basic_rates & BIT(ri)) |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 170 | basic = 0x80; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 171 | *pos++ = basic | (u8) rate; |
Simon Wunderlich | 93c7578 | 2013-07-11 20:29:49 +0200 | [diff] [blame] | 172 | if (++rates_added == 8) { |
| 173 | ri++; /* continue at next rate for EXT_SUPP_RATES */ |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 174 | break; |
Simon Wunderlich | 93c7578 | 2013-07-11 20:29:49 +0200 | [diff] [blame] | 175 | } |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 176 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 177 | |
| 178 | if (sband->band == IEEE80211_BAND_2GHZ) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 179 | *pos++ = WLAN_EID_DS_PARAMS; |
| 180 | *pos++ = 1; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 181 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 182 | } |
| 183 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 184 | *pos++ = WLAN_EID_IBSS_PARAMS; |
| 185 | *pos++ = 2; |
| 186 | /* FIX: set ATIM window based on scan results */ |
| 187 | *pos++ = 0; |
| 188 | *pos++ = 0; |
| 189 | |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 190 | /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ |
| 191 | if (rates_n > 8) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 192 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 193 | *pos++ = rates_n - 8; |
| 194 | for (; ri < sband->n_bitrates; ri++) { |
| 195 | int rate = DIV_ROUND_UP(sband->bitrates[ri].bitrate, |
| 196 | 5 * (1 << shift)); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 197 | u8 basic = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 198 | if (!(rates & BIT(ri))) |
| 199 | continue; |
| 200 | |
| 201 | if (basic_rates & BIT(ri)) |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 202 | basic = 0x80; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 203 | *pos++ = basic | (u8) rate; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 204 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 205 | } |
| 206 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 207 | if (ifibss->ie_len) { |
| 208 | memcpy(pos, ifibss->ie, ifibss->ie_len); |
| 209 | pos += ifibss->ie_len; |
| 210 | } |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 211 | |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 212 | /* add HT capability and information IEs */ |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 213 | if (chandef.width != NL80211_CHAN_WIDTH_20_NOHT && |
Simon Wunderlich | 0418a44 | 2013-05-16 13:00:31 +0200 | [diff] [blame] | 214 | chandef.width != NL80211_CHAN_WIDTH_5 && |
| 215 | chandef.width != NL80211_CHAN_WIDTH_10 && |
Johannes Berg | 683b6d3 | 2012-11-08 21:25:48 +0100 | [diff] [blame] | 216 | sband->ht_cap.ht_supported) { |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 217 | struct ieee80211_sta_ht_cap ht_cap; |
| 218 | |
| 219 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
| 220 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
| 221 | |
| 222 | pos = ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); |
Ashok Nagarajan | 0d894ec | 2012-05-07 21:00:29 -0700 | [diff] [blame] | 223 | /* |
| 224 | * Note: According to 802.11n-2009 9.13.3.1, HT Protection |
| 225 | * field and RIFS Mode are reserved in IBSS mode, therefore |
| 226 | * keep them at 0 |
| 227 | */ |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 228 | pos = ieee80211_ie_build_ht_oper(pos, &sband->ht_cap, |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 229 | &chandef, 0); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 230 | } |
| 231 | |
Johannes Berg | 32c5057 | 2012-03-28 11:04:29 +0200 | [diff] [blame] | 232 | if (local->hw.queues >= IEEE80211_NUM_ACS) { |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 233 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; |
| 234 | *pos++ = 7; /* len */ |
| 235 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ |
| 236 | *pos++ = 0x50; |
| 237 | *pos++ = 0xf2; |
| 238 | *pos++ = 2; /* WME */ |
| 239 | *pos++ = 0; /* WME info */ |
| 240 | *pos++ = 1; /* WME ver */ |
| 241 | *pos++ = 0; /* U-APSD no in use */ |
| 242 | } |
| 243 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 244 | presp->head_len = pos - presp->head; |
| 245 | if (WARN_ON(presp->head_len > frame_len)) |
| 246 | return; |
| 247 | |
| 248 | rcu_assign_pointer(ifibss->presp, presp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 249 | |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 250 | sdata->vif.bss_conf.enable_beacon = true; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 251 | sdata->vif.bss_conf.beacon_int = beacon_int; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 252 | sdata->vif.bss_conf.basic_rates = basic_rates; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 253 | sdata->vif.bss_conf.ssid_len = ifibss->ssid_len; |
| 254 | memcpy(sdata->vif.bss_conf.ssid, ifibss->ssid, ifibss->ssid_len); |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 255 | bss_change = BSS_CHANGED_BEACON_INT; |
| 256 | bss_change |= ieee80211_reset_erp_info(sdata); |
| 257 | bss_change |= BSS_CHANGED_BSSID; |
| 258 | bss_change |= BSS_CHANGED_BEACON; |
| 259 | bss_change |= BSS_CHANGED_BEACON_ENABLED; |
Teemu Paasikivi | 392cfdb | 2010-06-14 12:55:32 +0300 | [diff] [blame] | 260 | bss_change |= BSS_CHANGED_BASIC_RATES; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 261 | bss_change |= BSS_CHANGED_HT; |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 262 | bss_change |= BSS_CHANGED_IBSS; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 263 | bss_change |= BSS_CHANGED_SSID; |
Simon Wunderlich | 2f91a96 | 2012-12-03 22:21:30 +0100 | [diff] [blame] | 264 | |
| 265 | /* |
| 266 | * In 5 GHz/802.11a, we can always use short slot time. |
| 267 | * (IEEE 802.11-2012 18.3.8.7) |
| 268 | * |
| 269 | * In 2.4GHz, we must always use long slots in IBSS for compatibility |
| 270 | * reasons. |
| 271 | * (IEEE 802.11-2012 19.4.5) |
| 272 | * |
| 273 | * HT follows these specifications (IEEE 802.11-2012 20.3.18) |
| 274 | */ |
| 275 | sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ; |
| 276 | bss_change |= BSS_CHANGED_ERP_SLOT; |
| 277 | |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 278 | /* cf. IEEE 802.11 9.2.12 */ |
| 279 | if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit) |
| 280 | sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE; |
| 281 | else |
| 282 | sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; |
| 283 | |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 284 | sdata->vif.bss_conf.ibss_joined = true; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 285 | sdata->vif.bss_conf.ibss_creator = creator; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 286 | ieee80211_bss_info_change_notify(sdata, bss_change); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 287 | |
Simon Wunderlich | 2ec9c1f | 2013-07-11 18:07:46 +0200 | [diff] [blame] | 288 | ieee80211_set_wmm_default(sdata, true); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 289 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 290 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 291 | mod_timer(&ifibss->timer, |
| 292 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 293 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 294 | scan_width = cfg80211_chandef_to_scan_width(&chandef); |
| 295 | bss = cfg80211_inform_bss_width_frame(local->hw.wiphy, chan, |
| 296 | scan_width, mgmt, |
| 297 | presp->head_len, 0, GFP_KERNEL); |
Johannes Berg | 5b112d3 | 2013-02-01 01:49:58 +0100 | [diff] [blame] | 298 | cfg80211_put_bss(local->hw.wiphy, bss); |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 299 | netif_carrier_on(sdata->dev); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 300 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 301 | } |
| 302 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 303 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 304 | struct ieee80211_bss *bss) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 305 | { |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 306 | struct cfg80211_bss *cbss = |
| 307 | container_of((void *)bss, struct cfg80211_bss, priv); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 308 | struct ieee80211_supported_band *sband; |
| 309 | u32 basic_rates; |
| 310 | int i, j; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 311 | u16 beacon_int = cbss->beacon_interval; |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 312 | const struct cfg80211_bss_ies *ies; |
| 313 | u64 tsf; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 314 | u32 rate_flags; |
| 315 | int shift; |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 316 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 317 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 318 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 319 | if (beacon_int < 10) |
| 320 | beacon_int = 10; |
| 321 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 322 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 323 | rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef); |
| 324 | shift = ieee80211_vif_get_shift(&sdata->vif); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 325 | |
| 326 | basic_rates = 0; |
| 327 | |
| 328 | for (i = 0; i < bss->supp_rates_len; i++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 329 | int rate = bss->supp_rates[i] & 0x7f; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 330 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
| 331 | |
| 332 | for (j = 0; j < sband->n_bitrates; j++) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 333 | int brate; |
| 334 | if ((rate_flags & sband->bitrates[j].flags) |
| 335 | != rate_flags) |
| 336 | continue; |
| 337 | |
| 338 | brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, |
| 339 | 5 * (1 << shift)); |
| 340 | if (brate == rate) { |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 341 | if (is_basic) |
| 342 | basic_rates |= BIT(j); |
| 343 | break; |
| 344 | } |
| 345 | } |
| 346 | } |
| 347 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 348 | rcu_read_lock(); |
| 349 | ies = rcu_dereference(cbss->ies); |
| 350 | tsf = ies->tsf; |
| 351 | rcu_read_unlock(); |
| 352 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 353 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 354 | beacon_int, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 355 | cbss->channel, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 356 | basic_rates, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 357 | cbss->capability, |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 358 | tsf, false); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 359 | } |
| 360 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 361 | static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 362 | __acquires(RCU) |
| 363 | { |
| 364 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 365 | u8 addr[ETH_ALEN]; |
| 366 | |
| 367 | memcpy(addr, sta->sta.addr, ETH_ALEN); |
| 368 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 369 | ibss_dbg(sdata, "Adding new IBSS station %pM\n", addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 370 | |
Johannes Berg | 83d5cc0 | 2012-01-12 09:31:10 +0100 | [diff] [blame] | 371 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
| 372 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 373 | /* authorize the station only if the network is not RSN protected. If |
| 374 | * not wait for the userspace to authorize it */ |
| 375 | if (!sta->sdata->u.ibss.control_port) |
| 376 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 377 | |
| 378 | rate_control_rate_init(sta); |
| 379 | |
| 380 | /* If it fails, maybe we raced another insertion? */ |
| 381 | if (sta_info_insert_rcu(sta)) |
| 382 | return sta_info_get(sdata, addr); |
| 383 | return sta; |
| 384 | } |
| 385 | |
| 386 | static struct sta_info * |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 387 | ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, |
| 388 | const u8 *addr, u32 supp_rates) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 389 | __acquires(RCU) |
| 390 | { |
| 391 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 392 | struct ieee80211_local *local = sdata->local; |
| 393 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 394 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 395 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 396 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 397 | int band; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 398 | |
| 399 | /* |
| 400 | * XXX: Consider removing the least recently used entry and |
| 401 | * allow new one to be added. |
| 402 | */ |
| 403 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 404 | 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] | 405 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 406 | rcu_read_lock(); |
| 407 | return NULL; |
| 408 | } |
| 409 | |
| 410 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) { |
| 411 | rcu_read_lock(); |
| 412 | return NULL; |
| 413 | } |
| 414 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 415 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 416 | rcu_read_lock(); |
| 417 | return NULL; |
| 418 | } |
| 419 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 420 | rcu_read_lock(); |
| 421 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 422 | if (WARN_ON_ONCE(!chanctx_conf)) |
| 423 | return NULL; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 424 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 425 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 426 | rcu_read_unlock(); |
| 427 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 428 | sta = sta_info_alloc(sdata, addr, GFP_KERNEL); |
| 429 | if (!sta) { |
| 430 | rcu_read_lock(); |
| 431 | return NULL; |
| 432 | } |
| 433 | |
| 434 | sta->last_rx = jiffies; |
| 435 | |
| 436 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 437 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 438 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 439 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 440 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 441 | return ieee80211_ibss_finish_sta(sta); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 442 | } |
| 443 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 444 | static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, |
| 445 | struct ieee80211_mgmt *mgmt, |
| 446 | size_t len) |
| 447 | { |
| 448 | u16 reason = le16_to_cpu(mgmt->u.deauth.reason_code); |
| 449 | |
| 450 | if (len < IEEE80211_DEAUTH_FRAME_LEN) |
| 451 | return; |
| 452 | |
| 453 | ibss_dbg(sdata, "RX DeAuth SA=%pM DA=%pM BSSID=%pM (reason: %d)\n", |
| 454 | mgmt->sa, mgmt->da, mgmt->bssid, reason); |
| 455 | sta_info_destroy_addr(sdata, mgmt->sa); |
| 456 | } |
| 457 | |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 458 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
| 459 | struct ieee80211_mgmt *mgmt, |
| 460 | size_t len) |
| 461 | { |
| 462 | u16 auth_alg, auth_transaction; |
| 463 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 464 | sdata_assert_lock(sdata); |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 465 | |
| 466 | if (len < 24 + 6) |
| 467 | return; |
| 468 | |
| 469 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
| 470 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
| 471 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 472 | ibss_dbg(sdata, |
| 473 | "RX Auth SA=%pM DA=%pM BSSID=%pM (auth_transaction=%d)\n", |
| 474 | mgmt->sa, mgmt->da, mgmt->bssid, auth_transaction); |
Antonio Quartulli | 7bed205 | 2012-11-25 23:24:27 +0100 | [diff] [blame] | 475 | |
| 476 | if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) |
| 477 | return; |
| 478 | |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 479 | /* |
Antonio Quartulli | 6d810f1 | 2012-01-18 00:10:44 +0100 | [diff] [blame] | 480 | * IEEE 802.11 standard does not require authentication in IBSS |
| 481 | * networks and most implementations do not seem to use it. |
| 482 | * However, try to reply to authentication attempts if someone |
| 483 | * has actually implemented this. |
| 484 | */ |
Jouni Malinen | 700e8ea | 2012-09-30 19:29:37 +0300 | [diff] [blame] | 485 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, 0, NULL, 0, |
Johannes Berg | 1672c0e3 | 2013-01-29 15:02:27 +0100 | [diff] [blame] | 486 | mgmt->sa, sdata->u.ibss.bssid, NULL, 0, 0, 0); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 487 | } |
| 488 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 489 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 490 | struct ieee80211_mgmt *mgmt, size_t len, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 491 | struct ieee80211_rx_status *rx_status, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 492 | struct ieee802_11_elems *elems) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 493 | { |
| 494 | struct ieee80211_local *local = sdata->local; |
| 495 | int freq; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 496 | struct cfg80211_bss *cbss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 497 | struct ieee80211_bss *bss; |
| 498 | struct sta_info *sta; |
| 499 | struct ieee80211_channel *channel; |
| 500 | u64 beacon_timestamp, rx_timestamp; |
| 501 | u32 supp_rates = 0; |
| 502 | enum ieee80211_band band = rx_status->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 503 | enum nl80211_bss_scan_width scan_width; |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 504 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
| 505 | bool rates_updated = false; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 506 | |
Johannes Berg | 1cd8e88 | 2013-03-27 14:30:12 +0100 | [diff] [blame] | 507 | if (elems->ds_params) |
Bruno Randolf | 59eb21a | 2011-01-17 13:37:28 +0900 | [diff] [blame] | 508 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
| 509 | band); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 510 | else |
| 511 | freq = rx_status->freq; |
| 512 | |
| 513 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| 514 | |
| 515 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 516 | return; |
| 517 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 518 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 519 | ether_addr_equal(mgmt->bssid, sdata->u.ibss.bssid)) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 520 | |
| 521 | rcu_read_lock(); |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 522 | sta = sta_info_get(sdata, mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 523 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 524 | if (elems->supp_rates) { |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 525 | supp_rates = ieee80211_sta_get_rates(sdata, elems, |
Ashok Nagarajan | 9ebb61a | 2012-04-02 21:21:21 -0700 | [diff] [blame] | 526 | band, NULL); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 527 | if (sta) { |
| 528 | u32 prev_rates; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 529 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 530 | prev_rates = sta->sta.supp_rates[band]; |
| 531 | /* make sure mandatory rates are always added */ |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 532 | scan_width = NL80211_BSS_CHAN_WIDTH_20; |
| 533 | if (rx_status->flag & RX_FLAG_5MHZ) |
| 534 | scan_width = NL80211_BSS_CHAN_WIDTH_5; |
| 535 | if (rx_status->flag & RX_FLAG_10MHZ) |
| 536 | scan_width = NL80211_BSS_CHAN_WIDTH_10; |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 537 | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 538 | sta->sta.supp_rates[band] = supp_rates | |
| 539 | ieee80211_mandatory_rates(sband, |
| 540 | scan_width); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 541 | if (sta->sta.supp_rates[band] != prev_rates) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 542 | ibss_dbg(sdata, |
| 543 | "updated supp_rates set for %pM based on beacon/probe_resp (0x%x -> 0x%x)\n", |
| 544 | sta->sta.addr, prev_rates, |
| 545 | sta->sta.supp_rates[band]); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 546 | rates_updated = true; |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 547 | } |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 548 | } else { |
| 549 | rcu_read_unlock(); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 550 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 551 | mgmt->sa, supp_rates); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 552 | } |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 553 | } |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 554 | |
| 555 | if (sta && elems->wmm_info) |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 556 | set_sta_flag(sta, WLAN_STA_WME); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 557 | |
Johannes Berg | 074d46d | 2012-03-15 19:45:16 +0100 | [diff] [blame] | 558 | if (sta && elems->ht_operation && elems->ht_cap_elem && |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 559 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT && |
| 560 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_5 && |
| 561 | sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_10) { |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 562 | /* we both use HT */ |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 563 | struct ieee80211_ht_cap htcap_ie; |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 564 | struct cfg80211_chan_def chandef; |
| 565 | |
| 566 | ieee80211_ht_oper_to_chandef(channel, |
| 567 | elems->ht_operation, |
| 568 | &chandef); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 569 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 570 | memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie)); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 571 | |
| 572 | /* |
| 573 | * fall back to HT20 if we don't use or use |
| 574 | * the other extension channel |
| 575 | */ |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 576 | if (chandef.center_freq1 != |
| 577 | sdata->u.ibss.chandef.center_freq1) |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 578 | htcap_ie.cap_info &= |
| 579 | cpu_to_le16(~IEEE80211_HT_CAP_SUP_WIDTH_20_40); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 580 | |
Johannes Berg | e1a0c6b | 2013-02-07 11:47:44 +0100 | [diff] [blame] | 581 | rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap( |
| 582 | sdata, sband, &htcap_ie, sta); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 583 | } |
| 584 | |
Antonio Quartulli | e687f61 | 2012-08-12 18:24:55 +0200 | [diff] [blame] | 585 | if (sta && rates_updated) { |
| 586 | drv_sta_rc_update(local, sdata, &sta->sta, |
| 587 | IEEE80211_RC_SUPP_RATES_CHANGED); |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 588 | rate_control_rate_init(sta); |
Antonio Quartulli | e687f61 | 2012-08-12 18:24:55 +0200 | [diff] [blame] | 589 | } |
Alexander Simon | 13c40c5 | 2011-11-30 16:56:34 +0100 | [diff] [blame] | 590 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 591 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 595 | channel); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 596 | if (!bss) |
| 597 | return; |
| 598 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 599 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
| 600 | |
Johannes Berg | 8cef2c9 | 2013-02-05 16:54:31 +0100 | [diff] [blame] | 601 | /* same for beacon and probe response */ |
| 602 | beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 603 | |
| 604 | /* check if we need to merge IBSS */ |
| 605 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 606 | /* we use a fixed BSSID */ |
Benoit Papillault | a98bfec | 2010-01-17 22:45:24 +0100 | [diff] [blame] | 607 | if (sdata->u.ibss.fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 608 | goto put_bss; |
| 609 | |
| 610 | /* not an IBSS */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 611 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 612 | goto put_bss; |
| 613 | |
| 614 | /* different channel */ |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 615 | if (sdata->u.ibss.fixed_channel && |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 616 | sdata->u.ibss.chandef.chan != cbss->channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 617 | goto put_bss; |
| 618 | |
| 619 | /* different SSID */ |
| 620 | if (elems->ssid_len != sdata->u.ibss.ssid_len || |
| 621 | memcmp(elems->ssid, sdata->u.ibss.ssid, |
| 622 | sdata->u.ibss.ssid_len)) |
| 623 | goto put_bss; |
| 624 | |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 625 | /* same BSSID */ |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 626 | if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 627 | goto put_bss; |
| 628 | |
Thomas Pedersen | f4bda33 | 2012-11-13 10:46:27 -0800 | [diff] [blame] | 629 | if (ieee80211_have_rx_timestamp(rx_status)) { |
| 630 | /* time when timestamp field was received */ |
| 631 | rx_timestamp = |
| 632 | ieee80211_calculate_rx_timestamp(local, rx_status, |
| 633 | len + FCS_LEN, 24); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 634 | } else { |
| 635 | /* |
| 636 | * second best option: get current TSF |
| 637 | * (will return -1 if not supported) |
| 638 | */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 639 | rx_timestamp = drv_get_tsf(local, sdata); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 640 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 641 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 642 | ibss_dbg(sdata, |
| 643 | "RX beacon SA=%pM BSSID=%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", |
| 644 | mgmt->sa, mgmt->bssid, |
| 645 | (unsigned long long)rx_timestamp, |
| 646 | (unsigned long long)beacon_timestamp, |
| 647 | (unsigned long long)(rx_timestamp - beacon_timestamp), |
| 648 | jiffies); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 649 | |
| 650 | if (beacon_timestamp > rx_timestamp) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 651 | ibss_dbg(sdata, |
| 652 | "beacon TSF higher than local TSF - IBSS merge with BSSID %pM\n", |
| 653 | mgmt->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 654 | ieee80211_sta_join_ibss(sdata, bss); |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 655 | supp_rates = ieee80211_sta_get_rates(sdata, elems, band, NULL); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 656 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 657 | supp_rates); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 658 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 659 | } |
| 660 | |
| 661 | put_bss: |
| 662 | ieee80211_rx_bss_put(local, bss); |
| 663 | } |
| 664 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 665 | void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, |
| 666 | const u8 *bssid, const u8 *addr, |
| 667 | u32 supp_rates) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 668 | { |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 669 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 670 | struct ieee80211_local *local = sdata->local; |
| 671 | struct sta_info *sta; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 672 | struct ieee80211_chanctx_conf *chanctx_conf; |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 673 | struct ieee80211_supported_band *sband; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 674 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 675 | int band; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 676 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 677 | /* |
| 678 | * XXX: Consider removing the least recently used entry and |
| 679 | * allow new one to be added. |
| 680 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 681 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 682 | 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] | 683 | sdata->name, addr); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 684 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 685 | } |
| 686 | |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 687 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 688 | return; |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 689 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 690 | if (!ether_addr_equal(bssid, sdata->u.ibss.bssid)) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 691 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 692 | |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 693 | rcu_read_lock(); |
| 694 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
| 695 | if (WARN_ON_ONCE(!chanctx_conf)) { |
| 696 | rcu_read_unlock(); |
| 697 | return; |
| 698 | } |
Johannes Berg | 4bf8853 | 2012-11-09 11:39:59 +0100 | [diff] [blame] | 699 | band = chanctx_conf->def.chan->band; |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 700 | scan_width = cfg80211_chandef_to_scan_width(&chanctx_conf->def); |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 701 | rcu_read_unlock(); |
| 702 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 703 | sta = sta_info_alloc(sdata, addr, GFP_ATOMIC); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 704 | if (!sta) |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 705 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 706 | |
Rajkumar Manoharan | c8716d9 | 2010-10-23 10:59:57 +0530 | [diff] [blame] | 707 | sta->last_rx = jiffies; |
Johannes Berg | d9a7ddb | 2011-12-14 12:35:30 +0100 | [diff] [blame] | 708 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 709 | /* make sure mandatory rates are always added */ |
Ashok Nagarajan | b422c6c | 2013-05-10 17:50:51 -0700 | [diff] [blame] | 710 | sband = local->hw.wiphy->bands[band]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 711 | sta->sta.supp_rates[band] = supp_rates | |
Simon Wunderlich | 74608ac | 2013-07-08 16:55:54 +0200 | [diff] [blame] | 712 | ieee80211_mandatory_rates(sband, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 713 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 714 | spin_lock(&ifibss->incomplete_lock); |
| 715 | list_add(&sta->list, &ifibss->incomplete_stations); |
| 716 | spin_unlock(&ifibss->incomplete_lock); |
| 717 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
| 721 | { |
| 722 | struct ieee80211_local *local = sdata->local; |
| 723 | int active = 0; |
| 724 | struct sta_info *sta; |
| 725 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 726 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 727 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 728 | rcu_read_lock(); |
| 729 | |
| 730 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 731 | if (sta->sdata == sdata && |
| 732 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
| 733 | jiffies)) { |
| 734 | active++; |
| 735 | break; |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | rcu_read_unlock(); |
| 740 | |
| 741 | return active; |
| 742 | } |
| 743 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 744 | static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) |
| 745 | { |
| 746 | struct ieee80211_local *local = sdata->local; |
| 747 | struct sta_info *sta, *tmp; |
| 748 | unsigned long exp_time = IEEE80211_IBSS_INACTIVITY_LIMIT; |
| 749 | unsigned long exp_rsn_time = IEEE80211_IBSS_RSN_INACTIVITY_LIMIT; |
| 750 | |
| 751 | mutex_lock(&local->sta_mtx); |
| 752 | |
| 753 | list_for_each_entry_safe(sta, tmp, &local->sta_list, list) { |
| 754 | if (sdata != sta->sdata) |
| 755 | continue; |
| 756 | |
| 757 | if (time_after(jiffies, sta->last_rx + exp_time) || |
| 758 | (time_after(jiffies, sta->last_rx + exp_rsn_time) && |
| 759 | sta->sta_state != IEEE80211_STA_AUTHORIZED)) { |
| 760 | sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n", |
| 761 | sta->sta_state != IEEE80211_STA_AUTHORIZED ? |
| 762 | "not authorized " : "", sta->sta.addr); |
| 763 | |
| 764 | WARN_ON(__sta_info_destroy(sta)); |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | mutex_unlock(&local->sta_mtx); |
| 769 | } |
| 770 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 771 | /* |
| 772 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED |
| 773 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 774 | |
| 775 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) |
| 776 | { |
| 777 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 778 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 779 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 780 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 781 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 782 | mod_timer(&ifibss->timer, |
| 783 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 784 | |
Antonio Quartulli | dad9def | 2013-07-26 21:15:02 +0200 | [diff] [blame] | 785 | ieee80211_ibss_sta_expire(sdata); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 786 | |
Sujith | 450aae3 | 2009-11-02 12:33:23 +0530 | [diff] [blame] | 787 | if (time_before(jiffies, ifibss->last_scan_completed + |
| 788 | IEEE80211_IBSS_MERGE_INTERVAL)) |
| 789 | return; |
| 790 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 791 | if (ieee80211_sta_active_ibss(sdata)) |
| 792 | return; |
| 793 | |
John W. Linville | c037b83 | 2012-01-30 15:28:11 -0500 | [diff] [blame] | 794 | if (ifibss->fixed_channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 795 | return; |
| 796 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 797 | sdata_info(sdata, |
| 798 | "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] | 799 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 800 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 801 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, ifibss->ssid_len, |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 802 | NULL, scan_width); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 803 | } |
| 804 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 805 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 806 | { |
| 807 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 808 | u8 bssid[ETH_ALEN]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 809 | u16 capability; |
| 810 | int i; |
| 811 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 812 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 813 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 814 | if (ifibss->fixed_bssid) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 815 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
| 816 | } else { |
| 817 | /* Generate random, not broadcast, locally administered BSSID. Mix in |
| 818 | * own MAC address to make sure that devices that do not have proper |
| 819 | * random number generator get different BSSID. */ |
| 820 | get_random_bytes(bssid, ETH_ALEN); |
| 821 | for (i = 0; i < ETH_ALEN; i++) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 822 | bssid[i] ^= sdata->vif.addr[i]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 823 | bssid[0] &= ~0x01; |
| 824 | bssid[0] |= 0x02; |
| 825 | } |
| 826 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 827 | sdata_info(sdata, "Creating new IBSS network, BSSID %pM\n", bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 828 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 829 | capability = WLAN_CAPABILITY_IBSS; |
| 830 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 831 | if (ifibss->privacy) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 832 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 833 | else |
| 834 | sdata->drop_unencrypted = 0; |
| 835 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 836 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 837 | ifibss->chandef.chan, ifibss->basic_rates, |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 838 | capability, 0, true); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 839 | } |
| 840 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 841 | /* |
| 842 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH |
| 843 | */ |
| 844 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 845 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 846 | { |
| 847 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 848 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 849 | struct cfg80211_bss *cbss; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 850 | struct ieee80211_channel *chan = NULL; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 851 | const u8 *bssid = NULL; |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 852 | enum nl80211_bss_scan_width scan_width; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 853 | int active_ibss; |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 854 | u16 capability; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 855 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 856 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 857 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 858 | active_ibss = ieee80211_sta_active_ibss(sdata); |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 859 | ibss_dbg(sdata, "sta_find_ibss (active_ibss=%d)\n", active_ibss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 860 | |
| 861 | if (active_ibss) |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 862 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 863 | |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 864 | capability = WLAN_CAPABILITY_IBSS; |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 865 | if (ifibss->privacy) |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 866 | capability |= WLAN_CAPABILITY_PRIVACY; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 867 | if (ifibss->fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 868 | bssid = ifibss->bssid; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 869 | if (ifibss->fixed_channel) |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 870 | chan = ifibss->chandef.chan; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 871 | if (!is_zero_ether_addr(ifibss->bssid)) |
| 872 | bssid = ifibss->bssid; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 873 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
| 874 | ifibss->ssid, ifibss->ssid_len, |
| 875 | WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, |
| 876 | capability); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 877 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 878 | if (cbss) { |
| 879 | struct ieee80211_bss *bss; |
| 880 | |
| 881 | bss = (void *)cbss->priv; |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 882 | ibss_dbg(sdata, |
| 883 | "sta_find_ibss: selected %pM current %pM\n", |
| 884 | cbss->bssid, ifibss->bssid); |
| 885 | sdata_info(sdata, |
| 886 | "Selected IBSS BSSID %pM based on configured SSID\n", |
| 887 | cbss->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 888 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 889 | ieee80211_sta_join_ibss(sdata, bss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 890 | ieee80211_rx_bss_put(local, bss); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 891 | return; |
Reinette Chatre | d419b9f | 2009-10-19 14:55:37 -0700 | [diff] [blame] | 892 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 893 | |
Antonio Quartulli | d8eb741 | 2013-08-09 18:58:32 +0200 | [diff] [blame^] | 894 | /* if a fixed bssid and a fixed freq have been provided create the IBSS |
| 895 | * directly and do not waste time scanning |
| 896 | */ |
| 897 | if (ifibss->fixed_bssid && ifibss->fixed_channel) { |
| 898 | sdata_info(sdata, "Created IBSS using preconfigured BSSID %pM\n", |
| 899 | bssid); |
| 900 | ieee80211_sta_create_ibss(sdata); |
| 901 | return; |
| 902 | } |
| 903 | |
| 904 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 905 | 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] | 906 | |
| 907 | /* Selected IBSS not found in current scan results - try to scan */ |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 908 | if (time_after(jiffies, ifibss->last_scan_completed + |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 909 | IEEE80211_SCAN_INTERVAL)) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 910 | 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] | 911 | |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 912 | scan_width = cfg80211_chandef_to_scan_width(&ifibss->chandef); |
Stanislaw Gruszka | 34bcf71 | 2012-12-11 10:48:23 +0100 | [diff] [blame] | 913 | ieee80211_request_ibss_scan(sdata, ifibss->ssid, |
Simon Wunderlich | 7ca15a0 | 2013-07-08 16:55:56 +0200 | [diff] [blame] | 914 | ifibss->ssid_len, chan, |
| 915 | scan_width); |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 916 | } else { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 917 | int interval = IEEE80211_SCAN_INTERVAL; |
| 918 | |
| 919 | if (time_after(jiffies, ifibss->ibss_join_req + |
Johannes Berg | 55de908 | 2012-07-26 17:24:39 +0200 | [diff] [blame] | 920 | IEEE80211_IBSS_JOIN_TIMEOUT)) |
| 921 | ieee80211_sta_create_ibss(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 922 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 923 | mod_timer(&ifibss->timer, |
| 924 | round_jiffies(jiffies + interval)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 925 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | 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] | 929 | struct sk_buff *req) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 930 | { |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 931 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 932 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 933 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 934 | int tx_last_beacon, len = req->len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 935 | struct sk_buff *skb; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 936 | struct beacon_data *presp; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 937 | u8 *pos, *end; |
| 938 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 939 | sdata_assert_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 940 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 941 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 942 | lockdep_is_held(&sdata->wdev.mtx)); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 943 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 944 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 945 | len < 24 + 2 || !presp) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 946 | return; |
| 947 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 948 | tx_last_beacon = drv_tx_last_beacon(local); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 949 | |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 950 | ibss_dbg(sdata, |
| 951 | "RX ProbeReq SA=%pM DA=%pM BSSID=%pM (tx_last_beacon=%d)\n", |
| 952 | mgmt->sa, mgmt->da, mgmt->bssid, tx_last_beacon); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 953 | |
Felix Fietkau | 1ed7648 | 2011-03-24 19:46:18 +0100 | [diff] [blame] | 954 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 955 | return; |
| 956 | |
Joe Perches | b203ca3 | 2012-05-08 18:56:52 +0000 | [diff] [blame] | 957 | if (!ether_addr_equal(mgmt->bssid, ifibss->bssid) && |
Felix Fietkau | 888d04d | 2012-03-01 15:22:09 +0100 | [diff] [blame] | 958 | !is_broadcast_ether_addr(mgmt->bssid)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 959 | return; |
| 960 | |
| 961 | end = ((u8 *) mgmt) + len; |
| 962 | pos = mgmt->u.probe_req.variable; |
| 963 | if (pos[0] != WLAN_EID_SSID || |
| 964 | pos + 2 + pos[1] > end) { |
Johannes Berg | bdcbd8e | 2012-06-22 11:29:50 +0200 | [diff] [blame] | 965 | ibss_dbg(sdata, "Invalid SSID IE in ProbeReq from %pM\n", |
| 966 | mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 967 | return; |
| 968 | } |
| 969 | if (pos[1] != 0 && |
| 970 | (pos[1] != ifibss->ssid_len || |
Benoit Papillault | 0da780c | 2010-02-05 01:21:03 +0100 | [diff] [blame] | 971 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 972 | /* Ignore ProbeReq for foreign SSID */ |
| 973 | return; |
| 974 | } |
| 975 | |
| 976 | /* Reply with ProbeResp */ |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 977 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 978 | if (!skb) |
| 979 | return; |
| 980 | |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 981 | skb_reserve(skb, local->tx_headroom); |
| 982 | memcpy(skb_put(skb, presp->head_len), presp->head, presp->head_len); |
| 983 | |
| 984 | memcpy(((struct ieee80211_mgmt *) skb->data)->da, mgmt->sa, ETH_ALEN); |
| 985 | ibss_dbg(sdata, "Sending ProbeResp to %pM\n", mgmt->sa); |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 986 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 987 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 988 | } |
| 989 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 990 | static |
| 991 | void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, |
| 992 | struct ieee80211_mgmt *mgmt, size_t len, |
| 993 | struct ieee80211_rx_status *rx_status) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 994 | { |
| 995 | size_t baselen; |
| 996 | struct ieee802_11_elems elems; |
| 997 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 998 | BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != |
| 999 | offsetof(typeof(mgmt->u.beacon), variable)); |
| 1000 | |
| 1001 | /* |
| 1002 | * either beacon or probe_resp but the variable field is at the |
| 1003 | * same offset |
| 1004 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1005 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 1006 | if (baselen > len) |
| 1007 | return; |
| 1008 | |
| 1009 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
Johannes Berg | b2e506b | 2013-03-26 14:54:16 +0100 | [diff] [blame] | 1010 | false, &elems); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1011 | |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1012 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1013 | } |
| 1014 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1015 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 1016 | struct sk_buff *skb) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1017 | { |
| 1018 | struct ieee80211_rx_status *rx_status; |
| 1019 | struct ieee80211_mgmt *mgmt; |
| 1020 | u16 fc; |
| 1021 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 1022 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1023 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 1024 | fc = le16_to_cpu(mgmt->frame_control); |
| 1025 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1026 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1027 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1028 | if (!sdata->u.ibss.ssid_len) |
| 1029 | goto mgmt_out; /* not ready to merge yet */ |
| 1030 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1031 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 1032 | case IEEE80211_STYPE_PROBE_REQ: |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 1033 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1034 | break; |
| 1035 | case IEEE80211_STYPE_PROBE_RESP: |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1036 | case IEEE80211_STYPE_BEACON: |
Emmanuel Grumbach | d45c417 | 2012-12-10 16:19:13 +0200 | [diff] [blame] | 1037 | ieee80211_rx_mgmt_probe_beacon(sdata, mgmt, skb->len, |
| 1038 | rx_status); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1039 | break; |
| 1040 | case IEEE80211_STYPE_AUTH: |
| 1041 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); |
| 1042 | break; |
Antonio Quartulli | 2cc59e7 | 2012-09-07 13:28:53 +0200 | [diff] [blame] | 1043 | case IEEE80211_STYPE_DEAUTH: |
| 1044 | ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); |
| 1045 | break; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1046 | } |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1047 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 1048 | mgmt_out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1049 | sdata_unlock(sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1050 | } |
| 1051 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1052 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1053 | { |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 1054 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1055 | struct sta_info *sta; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1056 | |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1057 | sdata_lock(sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1058 | |
| 1059 | /* |
| 1060 | * Work could be scheduled after scan or similar |
| 1061 | * when we aren't even joined (or trying) with a |
| 1062 | * network. |
| 1063 | */ |
| 1064 | if (!ifibss->ssid_len) |
| 1065 | goto out; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1066 | |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1067 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1068 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 1069 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 1070 | struct sta_info, list); |
| 1071 | list_del(&sta->list); |
| 1072 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1073 | |
Antonio Quartulli | 52874a5 | 2013-06-18 14:20:40 +0200 | [diff] [blame] | 1074 | ieee80211_ibss_finish_sta(sta); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1075 | rcu_read_unlock(); |
| 1076 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1077 | } |
| 1078 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1079 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1080 | switch (ifibss->state) { |
| 1081 | case IEEE80211_IBSS_MLME_SEARCH: |
| 1082 | ieee80211_sta_find_ibss(sdata); |
| 1083 | break; |
| 1084 | case IEEE80211_IBSS_MLME_JOINED: |
| 1085 | ieee80211_sta_merge_ibss(sdata); |
| 1086 | break; |
| 1087 | default: |
| 1088 | WARN_ON(1); |
| 1089 | break; |
| 1090 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1091 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1092 | out: |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1093 | sdata_unlock(sdata); |
Johannes Berg | 3a4d4aa | 2010-05-26 16:41:40 +0200 | [diff] [blame] | 1094 | } |
| 1095 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1096 | static void ieee80211_ibss_timer(unsigned long data) |
| 1097 | { |
| 1098 | struct ieee80211_sub_if_data *sdata = |
| 1099 | (struct ieee80211_sub_if_data *) data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1100 | |
Stanislaw Gruszka | a618294 | 2013-02-28 10:55:28 +0100 | [diff] [blame] | 1101 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1102 | } |
| 1103 | |
| 1104 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
| 1105 | { |
| 1106 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1107 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1108 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
| 1109 | (unsigned long) sdata); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1110 | INIT_LIST_HEAD(&ifibss->incomplete_stations); |
| 1111 | spin_lock_init(&ifibss->incomplete_lock); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1112 | } |
| 1113 | |
| 1114 | /* scan finished notification */ |
| 1115 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) |
| 1116 | { |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1117 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1118 | |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1119 | mutex_lock(&local->iflist_mtx); |
| 1120 | list_for_each_entry(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 1121 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1122 | continue; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1123 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 1124 | continue; |
| 1125 | sdata->u.ibss.last_scan_completed = jiffies; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1126 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1127 | } |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 1128 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 1129 | } |
| 1130 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1131 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
| 1132 | struct cfg80211_ibss_params *params) |
| 1133 | { |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1134 | u32 changed = 0; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1135 | u32 rate_flags; |
| 1136 | struct ieee80211_supported_band *sband; |
| 1137 | int i; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1138 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1139 | if (params->bssid) { |
| 1140 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); |
| 1141 | sdata->u.ibss.fixed_bssid = true; |
| 1142 | } else |
| 1143 | sdata->u.ibss.fixed_bssid = false; |
| 1144 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1145 | sdata->u.ibss.privacy = params->privacy; |
Antonio Quartulli | 267335d | 2012-01-31 20:25:47 +0100 | [diff] [blame] | 1146 | sdata->u.ibss.control_port = params->control_port; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 1147 | sdata->u.ibss.basic_rates = params->basic_rates; |
Simon Wunderlich | 2103dec | 2013-07-08 16:55:53 +0200 | [diff] [blame] | 1148 | |
| 1149 | /* fix basic_rates if channel does not support these rates */ |
| 1150 | rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); |
| 1151 | sband = sdata->local->hw.wiphy->bands[params->chandef.chan->band]; |
| 1152 | for (i = 0; i < sband->n_bitrates; i++) { |
| 1153 | if ((rate_flags & sband->bitrates[i].flags) != rate_flags) |
| 1154 | sdata->u.ibss.basic_rates &= ~BIT(i); |
| 1155 | } |
Felix Fietkau | dd5b4cc | 2010-11-22 20:58:24 +0100 | [diff] [blame] | 1156 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
| 1157 | sizeof(params->mcast_rate)); |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 1158 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1159 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
| 1160 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1161 | sdata->u.ibss.chandef = params->chandef; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1162 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
| 1163 | |
| 1164 | if (params->ie) { |
| 1165 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, |
| 1166 | GFP_KERNEL); |
| 1167 | if (sdata->u.ibss.ie) |
| 1168 | sdata->u.ibss.ie_len = params->ie_len; |
| 1169 | } |
| 1170 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1171 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
| 1172 | sdata->u.ibss.ibss_join_req = jiffies; |
| 1173 | |
Antonio Quartulli | badecb0 | 2012-10-26 18:54:25 +0200 | [diff] [blame] | 1174 | memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len); |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 1175 | sdata->u.ibss.ssid_len = params->ssid_len; |
| 1176 | |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1177 | memcpy(&sdata->u.ibss.ht_capa, ¶ms->ht_capa, |
| 1178 | sizeof(sdata->u.ibss.ht_capa)); |
| 1179 | memcpy(&sdata->u.ibss.ht_capa_mask, ¶ms->ht_capa_mask, |
| 1180 | sizeof(sdata->u.ibss.ht_capa_mask)); |
| 1181 | |
Simon Wunderlich | ff3cc5f | 2011-11-30 16:56:33 +0100 | [diff] [blame] | 1182 | /* |
| 1183 | * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is |
| 1184 | * reserved, but an HT STA shall protect HT transmissions as though |
| 1185 | * the HT Protection field were set to non-HT mixed mode. |
| 1186 | * |
| 1187 | * In an IBSS, the RIFS Mode field of the HT Operation element is |
| 1188 | * also reserved, but an HT STA shall operate as though this field |
| 1189 | * were set to 1. |
| 1190 | */ |
| 1191 | |
| 1192 | sdata->vif.bss_conf.ht_operation_mode |= |
| 1193 | IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
| 1194 | | IEEE80211_HT_PARAM_RIFS_MODE; |
| 1195 | |
| 1196 | changed |= BSS_CHANGED_HT; |
| 1197 | ieee80211_bss_info_change_notify(sdata, changed); |
| 1198 | |
Johannes Berg | 04ecd25 | 2012-09-11 14:34:12 +0200 | [diff] [blame] | 1199 | sdata->smps_mode = IEEE80211_SMPS_OFF; |
| 1200 | sdata->needed_rx_chains = sdata->local->rx_chains; |
| 1201 | |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 1202 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1203 | |
| 1204 | return 0; |
| 1205 | } |
| 1206 | |
| 1207 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) |
| 1208 | { |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1209 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 1210 | struct ieee80211_local *local = sdata->local; |
| 1211 | struct cfg80211_bss *cbss; |
| 1212 | u16 capability; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1213 | int active_ibss; |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1214 | struct sta_info *sta; |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1215 | struct beacon_data *presp; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1216 | |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1217 | active_ibss = ieee80211_sta_active_ibss(sdata); |
| 1218 | |
| 1219 | if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { |
| 1220 | capability = WLAN_CAPABILITY_IBSS; |
| 1221 | |
| 1222 | if (ifibss->privacy) |
| 1223 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 1224 | |
Simon Wunderlich | 3aede78 | 2013-05-16 13:00:36 +0200 | [diff] [blame] | 1225 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1226 | ifibss->bssid, ifibss->ssid, |
| 1227 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | |
| 1228 | WLAN_CAPABILITY_PRIVACY, |
| 1229 | capability); |
| 1230 | |
| 1231 | if (cbss) { |
| 1232 | cfg80211_unlink_bss(local->hw.wiphy, cbss); |
Johannes Berg | 5b112d3 | 2013-02-01 01:49:58 +0100 | [diff] [blame] | 1233 | cfg80211_put_bss(local->hw.wiphy, cbss); |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 1234 | } |
| 1235 | } |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1236 | |
Simon Wunderlich | b78a493 | 2012-11-13 18:43:03 +0100 | [diff] [blame] | 1237 | ifibss->state = IEEE80211_IBSS_MLME_SEARCH; |
| 1238 | memset(ifibss->bssid, 0, ETH_ALEN); |
| 1239 | ifibss->ssid_len = 0; |
| 1240 | |
Johannes Berg | b998e8b | 2012-12-13 23:07:46 +0100 | [diff] [blame] | 1241 | sta_info_flush(sdata); |
Johannes Berg | 8bf11d8 | 2011-12-15 11:17:37 +0100 | [diff] [blame] | 1242 | |
| 1243 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1244 | while (!list_empty(&ifibss->incomplete_stations)) { |
| 1245 | sta = list_first_entry(&ifibss->incomplete_stations, |
| 1246 | struct sta_info, list); |
| 1247 | list_del(&sta->list); |
| 1248 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1249 | |
| 1250 | sta_info_free(local, sta); |
| 1251 | spin_lock_bh(&ifibss->incomplete_lock); |
| 1252 | } |
| 1253 | spin_unlock_bh(&ifibss->incomplete_lock); |
| 1254 | |
Eliad Peller | 86a2ea4 | 2011-11-08 15:36:59 +0200 | [diff] [blame] | 1255 | netif_carrier_off(sdata->dev); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1256 | |
| 1257 | /* remove beacon */ |
| 1258 | kfree(sdata->u.ibss.ie); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1259 | presp = rcu_dereference_protected(ifibss->presp, |
Johannes Berg | 8d61ffa | 2013-05-10 12:32:47 +0200 | [diff] [blame] | 1260 | lockdep_is_held(&sdata->wdev.mtx)); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 1261 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
Simon Wunderlich | 822854b | 2013-06-28 10:39:59 +0200 | [diff] [blame] | 1262 | |
| 1263 | /* on the next join, re-program HT parameters */ |
| 1264 | memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); |
| 1265 | memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); |
| 1266 | |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 1267 | sdata->vif.bss_conf.ibss_joined = false; |
Sujith Manoharan | c13a765 | 2012-10-12 17:35:45 +0530 | [diff] [blame] | 1268 | sdata->vif.bss_conf.ibss_creator = false; |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 1269 | sdata->vif.bss_conf.enable_beacon = false; |
Marek Puzyniak | 0ca54f6 | 2013-04-10 13:19:13 +0200 | [diff] [blame] | 1270 | sdata->vif.bss_conf.ssid_len = 0; |
Johannes Berg | d6a8322 | 2012-12-14 14:06:28 +0100 | [diff] [blame] | 1271 | clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 1272 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | |
| 1273 | BSS_CHANGED_IBSS); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1274 | synchronize_rcu(); |
Johannes Berg | c3ffeab | 2013-03-07 20:54:29 +0100 | [diff] [blame] | 1275 | kfree(presp); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1276 | |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 1277 | skb_queue_purge(&sdata->skb_queue); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1278 | |
Johannes Berg | bc05d19 | 2010-07-21 10:52:40 +0200 | [diff] [blame] | 1279 | del_timer_sync(&sdata->u.ibss.timer); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1280 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1281 | return 0; |
| 1282 | } |