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> |
| 23 | #include <asm/unaligned.h> |
| 24 | |
| 25 | #include "ieee80211_i.h" |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 26 | #include "driver-ops.h" |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 27 | #include "rate.h" |
| 28 | |
| 29 | #define IEEE80211_SCAN_INTERVAL (2 * HZ) |
| 30 | #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ) |
| 31 | #define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ) |
| 32 | |
| 33 | #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ) |
| 34 | #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ) |
| 35 | |
| 36 | #define IEEE80211_IBSS_MAX_STA_ENTRIES 128 |
| 37 | |
| 38 | |
| 39 | static void ieee80211_rx_mgmt_auth_ibss(struct ieee80211_sub_if_data *sdata, |
| 40 | struct ieee80211_mgmt *mgmt, |
| 41 | size_t len) |
| 42 | { |
Rajkumar Manoharan | 0915cba | 2011-04-25 15:56:17 +0530 | [diff] [blame] | 43 | u16 auth_alg, auth_transaction; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 44 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 45 | lockdep_assert_held(&sdata->u.ibss.mtx); |
| 46 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 47 | if (len < 24 + 6) |
| 48 | return; |
| 49 | |
| 50 | auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); |
| 51 | auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 52 | |
| 53 | /* |
| 54 | * IEEE 802.11 standard does not require authentication in IBSS |
| 55 | * networks and most implementations do not seem to use it. |
| 56 | * However, try to reply to authentication attempts if someone |
| 57 | * has actually implemented this. |
| 58 | */ |
| 59 | if (auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) |
| 60 | ieee80211_send_auth(sdata, 2, WLAN_AUTH_OPEN, NULL, 0, |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 61 | sdata->u.ibss.bssid, NULL, 0, 0); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 62 | } |
| 63 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 64 | static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 65 | const u8 *bssid, const int beacon_int, |
| 66 | struct ieee80211_channel *chan, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 67 | const u32 basic_rates, |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 68 | const u16 capability, u64 tsf) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 69 | { |
| 70 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 71 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 72 | int rates, i; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 73 | struct sk_buff *skb; |
| 74 | struct ieee80211_mgmt *mgmt; |
| 75 | u8 *pos; |
| 76 | struct ieee80211_supported_band *sband; |
Johannes Berg | f446d10 | 2009-10-28 15:12:32 +0100 | [diff] [blame] | 77 | struct cfg80211_bss *bss; |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 78 | u32 bss_change; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 79 | u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 80 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 81 | lockdep_assert_held(&ifibss->mtx); |
| 82 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 83 | /* Reset own TSF to allow time synchronization work. */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 84 | drv_reset_tsf(local, sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 85 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 86 | skb = ifibss->skb; |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 87 | RCU_INIT_POINTER(ifibss->presp, NULL); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 88 | synchronize_rcu(); |
| 89 | skb->data = skb->head; |
| 90 | skb->len = 0; |
| 91 | skb_reset_tail_pointer(skb); |
| 92 | skb_reserve(skb, sdata->local->hw.extra_tx_headroom); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 93 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 94 | if (memcmp(ifibss->bssid, bssid, ETH_ALEN)) |
| 95 | sta_info_flush(sdata->local, sdata); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 96 | |
Johannes Berg | 49b5c7f | 2010-04-29 21:34:01 +0200 | [diff] [blame] | 97 | /* if merging, indicate to driver that we leave the old IBSS */ |
| 98 | if (sdata->vif.bss_conf.ibss_joined) { |
| 99 | sdata->vif.bss_conf.ibss_joined = false; |
| 100 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS); |
| 101 | } |
| 102 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 103 | memcpy(ifibss->bssid, bssid, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 104 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 105 | sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 106 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 107 | local->oper_channel = chan; |
Johannes Berg | 0aaffa9 | 2010-05-05 15:28:27 +0200 | [diff] [blame] | 108 | WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT)); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 109 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 110 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 111 | sband = local->hw.wiphy->bands[chan->band]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 112 | |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 113 | /* build supported rates array */ |
| 114 | pos = supp_rates; |
| 115 | for (i = 0; i < sband->n_bitrates; i++) { |
| 116 | int rate = sband->bitrates[i].bitrate; |
| 117 | u8 basic = 0; |
| 118 | if (basic_rates & BIT(i)) |
| 119 | basic = 0x80; |
| 120 | *pos++ = basic | (u8) (rate / 5); |
| 121 | } |
| 122 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 123 | /* Build IBSS probe response */ |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 124 | mgmt = (void *) skb_put(skb, 24 + sizeof(mgmt->u.beacon)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 125 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); |
| 126 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 127 | IEEE80211_STYPE_PROBE_RESP); |
| 128 | memset(mgmt->da, 0xff, ETH_ALEN); |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 129 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 130 | memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 131 | mgmt->u.beacon.beacon_int = cpu_to_le16(beacon_int); |
Sujith | 707c1b4 | 2009-03-03 10:15:10 +0530 | [diff] [blame] | 132 | mgmt->u.beacon.timestamp = cpu_to_le64(tsf); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 133 | mgmt->u.beacon.capab_info = cpu_to_le16(capability); |
| 134 | |
| 135 | pos = skb_put(skb, 2 + ifibss->ssid_len); |
| 136 | *pos++ = WLAN_EID_SSID; |
| 137 | *pos++ = ifibss->ssid_len; |
| 138 | memcpy(pos, ifibss->ssid, ifibss->ssid_len); |
| 139 | |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 140 | rates = sband->n_bitrates; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 141 | if (rates > 8) |
| 142 | rates = 8; |
| 143 | pos = skb_put(skb, 2 + rates); |
| 144 | *pos++ = WLAN_EID_SUPP_RATES; |
| 145 | *pos++ = rates; |
| 146 | memcpy(pos, supp_rates, rates); |
| 147 | |
| 148 | if (sband->band == IEEE80211_BAND_2GHZ) { |
| 149 | pos = skb_put(skb, 2 + 1); |
| 150 | *pos++ = WLAN_EID_DS_PARAMS; |
| 151 | *pos++ = 1; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 152 | *pos++ = ieee80211_frequency_to_channel(chan->center_freq); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | pos = skb_put(skb, 2 + 2); |
| 156 | *pos++ = WLAN_EID_IBSS_PARAMS; |
| 157 | *pos++ = 2; |
| 158 | /* FIX: set ATIM window based on scan results */ |
| 159 | *pos++ = 0; |
| 160 | *pos++ = 0; |
| 161 | |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 162 | if (sband->n_bitrates > 8) { |
| 163 | rates = sband->n_bitrates - 8; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 164 | pos = skb_put(skb, 2 + rates); |
| 165 | *pos++ = WLAN_EID_EXT_SUPP_RATES; |
| 166 | *pos++ = rates; |
| 167 | memcpy(pos, &supp_rates[8], rates); |
| 168 | } |
| 169 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 170 | if (ifibss->ie_len) |
| 171 | memcpy(skb_put(skb, ifibss->ie_len), |
| 172 | ifibss->ie, ifibss->ie_len); |
| 173 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 174 | if (local->hw.queues >= 4) { |
| 175 | pos = skb_put(skb, 9); |
| 176 | *pos++ = WLAN_EID_VENDOR_SPECIFIC; |
| 177 | *pos++ = 7; /* len */ |
| 178 | *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */ |
| 179 | *pos++ = 0x50; |
| 180 | *pos++ = 0xf2; |
| 181 | *pos++ = 2; /* WME */ |
| 182 | *pos++ = 0; /* WME info */ |
| 183 | *pos++ = 1; /* WME ver */ |
| 184 | *pos++ = 0; /* U-APSD no in use */ |
| 185 | } |
| 186 | |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 187 | RCU_INIT_POINTER(ifibss->presp, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 188 | |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 189 | sdata->vif.bss_conf.beacon_int = beacon_int; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 190 | sdata->vif.bss_conf.basic_rates = basic_rates; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 191 | bss_change = BSS_CHANGED_BEACON_INT; |
| 192 | bss_change |= ieee80211_reset_erp_info(sdata); |
| 193 | bss_change |= BSS_CHANGED_BSSID; |
| 194 | bss_change |= BSS_CHANGED_BEACON; |
| 195 | bss_change |= BSS_CHANGED_BEACON_ENABLED; |
Teemu Paasikivi | 392cfdb | 2010-06-14 12:55:32 +0300 | [diff] [blame] | 196 | bss_change |= BSS_CHANGED_BASIC_RATES; |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 197 | bss_change |= BSS_CHANGED_IBSS; |
| 198 | sdata->vif.bss_conf.ibss_joined = true; |
Johannes Berg | 2d0ddec | 2009-04-23 16:13:26 +0200 | [diff] [blame] | 199 | ieee80211_bss_info_change_notify(sdata, bss_change); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 200 | |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 201 | ieee80211_sta_def_wmm_params(sdata, sband->n_bitrates, supp_rates); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 202 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 203 | ifibss->state = IEEE80211_IBSS_MLME_JOINED; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 204 | mod_timer(&ifibss->timer, |
| 205 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 206 | |
Johannes Berg | f446d10 | 2009-10-28 15:12:32 +0100 | [diff] [blame] | 207 | bss = cfg80211_inform_bss_frame(local->hw.wiphy, local->hw.conf.channel, |
| 208 | mgmt, skb->len, 0, GFP_KERNEL); |
| 209 | cfg80211_put_bss(bss); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 210 | cfg80211_ibss_joined(sdata->dev, ifibss->bssid, GFP_KERNEL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 211 | } |
| 212 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 213 | static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, |
| 214 | struct ieee80211_bss *bss) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 215 | { |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 216 | struct cfg80211_bss *cbss = |
| 217 | container_of((void *)bss, struct cfg80211_bss, priv); |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 218 | struct ieee80211_supported_band *sband; |
| 219 | u32 basic_rates; |
| 220 | int i, j; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 221 | u16 beacon_int = cbss->beacon_interval; |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 222 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 223 | lockdep_assert_held(&sdata->u.ibss.mtx); |
| 224 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 225 | if (beacon_int < 10) |
| 226 | beacon_int = 10; |
| 227 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 228 | sband = sdata->local->hw.wiphy->bands[cbss->channel->band]; |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 229 | |
| 230 | basic_rates = 0; |
| 231 | |
| 232 | for (i = 0; i < bss->supp_rates_len; i++) { |
| 233 | int rate = (bss->supp_rates[i] & 0x7f) * 5; |
| 234 | bool is_basic = !!(bss->supp_rates[i] & 0x80); |
| 235 | |
| 236 | for (j = 0; j < sband->n_bitrates; j++) { |
| 237 | if (sband->bitrates[j].bitrate == rate) { |
| 238 | if (is_basic) |
| 239 | basic_rates |= BIT(j); |
| 240 | break; |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 245 | __ieee80211_sta_join_ibss(sdata, cbss->bssid, |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 246 | beacon_int, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 247 | cbss->channel, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 248 | basic_rates, |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 249 | cbss->capability, |
| 250 | cbss->tsf); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, |
| 254 | struct ieee80211_mgmt *mgmt, |
| 255 | size_t len, |
| 256 | struct ieee80211_rx_status *rx_status, |
| 257 | struct ieee802_11_elems *elems, |
| 258 | bool beacon) |
| 259 | { |
| 260 | struct ieee80211_local *local = sdata->local; |
| 261 | int freq; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 262 | struct cfg80211_bss *cbss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 263 | struct ieee80211_bss *bss; |
| 264 | struct sta_info *sta; |
| 265 | struct ieee80211_channel *channel; |
| 266 | u64 beacon_timestamp, rx_timestamp; |
| 267 | u32 supp_rates = 0; |
| 268 | enum ieee80211_band band = rx_status->band; |
| 269 | |
| 270 | if (elems->ds_params && elems->ds_params_len == 1) |
Bruno Randolf | 59eb21a | 2011-01-17 13:37:28 +0900 | [diff] [blame] | 271 | freq = ieee80211_channel_to_frequency(elems->ds_params[0], |
| 272 | band); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 273 | else |
| 274 | freq = rx_status->freq; |
| 275 | |
| 276 | channel = ieee80211_get_channel(local->hw.wiphy, freq); |
| 277 | |
| 278 | if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) |
| 279 | return; |
| 280 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 281 | if (sdata->vif.type == NL80211_IFTYPE_ADHOC && |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 282 | memcmp(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 283 | |
| 284 | rcu_read_lock(); |
Johannes Berg | abe6063 | 2009-11-25 17:46:18 +0100 | [diff] [blame] | 285 | sta = sta_info_get(sdata, mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 286 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 287 | if (elems->supp_rates) { |
| 288 | supp_rates = ieee80211_sta_get_rates(local, elems, |
| 289 | band); |
| 290 | if (sta) { |
| 291 | u32 prev_rates; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 292 | |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 293 | prev_rates = sta->sta.supp_rates[band]; |
| 294 | /* make sure mandatory rates are always added */ |
| 295 | sta->sta.supp_rates[band] = supp_rates | |
| 296 | ieee80211_mandatory_rates(local, band); |
| 297 | |
| 298 | if (sta->sta.supp_rates[band] != prev_rates) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 299 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 300 | printk(KERN_DEBUG |
| 301 | "%s: updated supp_rates set " |
| 302 | "for %pM based on beacon" |
| 303 | "/probe_resp (0x%x -> 0x%x)\n", |
| 304 | sdata->name, sta->sta.addr, |
| 305 | prev_rates, |
| 306 | sta->sta.supp_rates[band]); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 307 | #endif |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 308 | rate_control_rate_init(sta); |
| 309 | } |
| 310 | } else |
| 311 | sta = ieee80211_ibss_add_sta(sdata, mgmt->bssid, |
| 312 | mgmt->sa, supp_rates, |
| 313 | GFP_ATOMIC); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 314 | } |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 315 | |
| 316 | if (sta && elems->wmm_info) |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 317 | set_sta_flag(sta, WLAN_STA_WME); |
Bruno Randolf | 9eba612 | 2010-10-04 11:17:30 +0900 | [diff] [blame] | 318 | |
| 319 | rcu_read_unlock(); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, |
| 323 | channel, beacon); |
| 324 | if (!bss) |
| 325 | return; |
| 326 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 327 | cbss = container_of((void *)bss, struct cfg80211_bss, priv); |
| 328 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 329 | /* was just updated in ieee80211_bss_info_update */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 330 | beacon_timestamp = cbss->tsf; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 331 | |
| 332 | /* check if we need to merge IBSS */ |
| 333 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 334 | /* we use a fixed BSSID */ |
Benoit Papillault | a98bfec | 2010-01-17 22:45:24 +0100 | [diff] [blame] | 335 | if (sdata->u.ibss.fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 336 | goto put_bss; |
| 337 | |
| 338 | /* not an IBSS */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 339 | if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 340 | goto put_bss; |
| 341 | |
| 342 | /* different channel */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 343 | if (cbss->channel != local->oper_channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 344 | goto put_bss; |
| 345 | |
| 346 | /* different SSID */ |
| 347 | if (elems->ssid_len != sdata->u.ibss.ssid_len || |
| 348 | memcmp(elems->ssid, sdata->u.ibss.ssid, |
| 349 | sdata->u.ibss.ssid_len)) |
| 350 | goto put_bss; |
| 351 | |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 352 | /* same BSSID */ |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 353 | if (memcmp(cbss->bssid, sdata->u.ibss.bssid, ETH_ALEN) == 0) |
Alina Friedrichsen | 34e8f08 | 2009-02-22 00:07:28 +0100 | [diff] [blame] | 354 | goto put_bss; |
| 355 | |
Johannes Berg | 6ebacbb | 2011-02-23 15:06:08 +0100 | [diff] [blame] | 356 | if (rx_status->flag & RX_FLAG_MACTIME_MPDU) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 357 | /* |
| 358 | * For correct IBSS merging we need mactime; since mactime is |
| 359 | * defined as the time the first data symbol of the frame hits |
| 360 | * the PHY, and the timestamp of the beacon is defined as "the |
| 361 | * time that the data symbol containing the first bit of the |
| 362 | * timestamp is transmitted to the PHY plus the transmitting |
| 363 | * STA's delays through its local PHY from the MAC-PHY |
| 364 | * interface to its interface with the WM" (802.11 11.1.2) |
| 365 | * - equals the time this bit arrives at the receiver - we have |
| 366 | * to take into account the offset between the two. |
| 367 | * |
| 368 | * E.g. at 1 MBit that means mactime is 192 usec earlier |
| 369 | * (=24 bytes * 8 usecs/byte) than the beacon timestamp. |
| 370 | */ |
| 371 | int rate; |
| 372 | |
| 373 | if (rx_status->flag & RX_FLAG_HT) |
| 374 | rate = 65; /* TODO: HT rates */ |
| 375 | else |
| 376 | rate = local->hw.wiphy->bands[band]-> |
| 377 | bitrates[rx_status->rate_idx].bitrate; |
| 378 | |
| 379 | rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 380 | } else { |
| 381 | /* |
| 382 | * second best option: get current TSF |
| 383 | * (will return -1 if not supported) |
| 384 | */ |
Eliad Peller | 37a41b4 | 2011-09-21 14:06:11 +0300 | [diff] [blame] | 385 | rx_timestamp = drv_get_tsf(local, sdata); |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 386 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 387 | |
| 388 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| 389 | printk(KERN_DEBUG "RX beacon SA=%pM BSSID=" |
| 390 | "%pM TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n", |
| 391 | mgmt->sa, mgmt->bssid, |
| 392 | (unsigned long long)rx_timestamp, |
| 393 | (unsigned long long)beacon_timestamp, |
| 394 | (unsigned long long)(rx_timestamp - beacon_timestamp), |
| 395 | jiffies); |
| 396 | #endif |
| 397 | |
| 398 | if (beacon_timestamp > rx_timestamp) { |
| 399 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| 400 | printk(KERN_DEBUG "%s: beacon TSF higher than " |
| 401 | "local TSF - IBSS merge with BSSID %pM\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 402 | sdata->name, mgmt->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 403 | #endif |
| 404 | ieee80211_sta_join_ibss(sdata, bss); |
Bruno Randolf | 09a08cf | 2010-03-03 18:45:42 +0900 | [diff] [blame] | 405 | supp_rates = ieee80211_sta_get_rates(local, elems, band); |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 406 | ieee80211_ibss_add_sta(sdata, mgmt->bssid, mgmt->sa, |
| 407 | supp_rates, GFP_KERNEL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | put_bss: |
| 411 | ieee80211_rx_bss_put(local, bss); |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Add a new IBSS station, will also be called by the RX code when, |
| 416 | * in IBSS mode, receiving a frame from a yet-unknown station, hence |
| 417 | * must be callable in atomic context. |
| 418 | */ |
| 419 | struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, |
Alexander Simon | a7ce1c9 | 2011-09-18 00:16:45 +0200 | [diff] [blame] | 420 | u8 *bssid, u8 *addr, u32 supp_rates, |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 421 | gfp_t gfp) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 422 | { |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 423 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 424 | struct ieee80211_local *local = sdata->local; |
| 425 | struct sta_info *sta; |
| 426 | int band = local->hw.conf.channel->band; |
| 427 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 428 | /* |
| 429 | * XXX: Consider removing the least recently used entry and |
| 430 | * allow new one to be added. |
| 431 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 432 | if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) { |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 433 | if (net_ratelimit()) |
| 434 | printk(KERN_DEBUG "%s: No room for a new IBSS STA entry %pM\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 435 | sdata->name, addr); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 436 | return NULL; |
| 437 | } |
| 438 | |
Felix Fietkau | 2e10d33 | 2009-12-20 19:07:09 +0100 | [diff] [blame] | 439 | if (ifibss->state == IEEE80211_IBSS_MLME_SEARCH) |
| 440 | return NULL; |
| 441 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 442 | if (compare_ether_addr(bssid, sdata->u.ibss.bssid)) |
| 443 | return NULL; |
| 444 | |
| 445 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
Joe Perches | 0fb9a9e | 2010-08-20 16:25:38 -0700 | [diff] [blame] | 446 | wiphy_debug(local->hw.wiphy, "Adding new IBSS station %pM (dev=%s)\n", |
| 447 | addr, sdata->name); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 448 | #endif |
| 449 | |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 450 | sta = sta_info_alloc(sdata, addr, gfp); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 451 | if (!sta) |
| 452 | return NULL; |
| 453 | |
Rajkumar Manoharan | c8716d9 | 2010-10-23 10:59:57 +0530 | [diff] [blame] | 454 | sta->last_rx = jiffies; |
Johannes Berg | c2c98fd | 2011-09-29 16:04:36 +0200 | [diff] [blame] | 455 | set_sta_flag(sta, WLAN_STA_AUTHORIZED); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 456 | |
| 457 | /* make sure mandatory rates are always added */ |
| 458 | sta->sta.supp_rates[band] = supp_rates | |
| 459 | ieee80211_mandatory_rates(local, band); |
| 460 | |
| 461 | rate_control_rate_init(sta); |
| 462 | |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 463 | /* If it fails, maybe we raced another insertion? */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 464 | if (sta_info_insert(sta)) |
Johannes Berg | 34e8950 | 2010-02-03 13:59:58 +0100 | [diff] [blame] | 465 | return sta_info_get(sdata, addr); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 466 | return sta; |
| 467 | } |
| 468 | |
| 469 | static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) |
| 470 | { |
| 471 | struct ieee80211_local *local = sdata->local; |
| 472 | int active = 0; |
| 473 | struct sta_info *sta; |
| 474 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 475 | lockdep_assert_held(&sdata->u.ibss.mtx); |
| 476 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 477 | rcu_read_lock(); |
| 478 | |
| 479 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
| 480 | if (sta->sdata == sdata && |
| 481 | time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, |
| 482 | jiffies)) { |
| 483 | active++; |
| 484 | break; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | rcu_read_unlock(); |
| 489 | |
| 490 | return active; |
| 491 | } |
| 492 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 493 | /* |
| 494 | * This function is called with state == IEEE80211_IBSS_MLME_JOINED |
| 495 | */ |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 496 | |
| 497 | static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata) |
| 498 | { |
| 499 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 500 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 501 | lockdep_assert_held(&ifibss->mtx); |
| 502 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 503 | mod_timer(&ifibss->timer, |
| 504 | round_jiffies(jiffies + IEEE80211_IBSS_MERGE_INTERVAL)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 505 | |
| 506 | ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 507 | |
Sujith | 450aae3 | 2009-11-02 12:33:23 +0530 | [diff] [blame] | 508 | if (time_before(jiffies, ifibss->last_scan_completed + |
| 509 | IEEE80211_IBSS_MERGE_INTERVAL)) |
| 510 | return; |
| 511 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 512 | if (ieee80211_sta_active_ibss(sdata)) |
| 513 | return; |
| 514 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 515 | if (ifibss->fixed_channel) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 516 | return; |
| 517 | |
| 518 | printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other " |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 519 | "IBSS networks with same SSID (merge)\n", sdata->name); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 520 | |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 521 | ieee80211_request_internal_scan(sdata, |
| 522 | ifibss->ssid, ifibss->ssid_len, |
| 523 | ifibss->fixed_channel ? ifibss->channel : NULL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 524 | } |
| 525 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 526 | static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 527 | { |
| 528 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 529 | u8 bssid[ETH_ALEN]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 530 | u16 capability; |
| 531 | int i; |
| 532 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 533 | lockdep_assert_held(&ifibss->mtx); |
| 534 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 535 | if (ifibss->fixed_bssid) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 536 | memcpy(bssid, ifibss->bssid, ETH_ALEN); |
| 537 | } else { |
| 538 | /* Generate random, not broadcast, locally administered BSSID. Mix in |
| 539 | * own MAC address to make sure that devices that do not have proper |
| 540 | * random number generator get different BSSID. */ |
| 541 | get_random_bytes(bssid, ETH_ALEN); |
| 542 | for (i = 0; i < ETH_ALEN; i++) |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 543 | bssid[i] ^= sdata->vif.addr[i]; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 544 | bssid[0] &= ~0x01; |
| 545 | bssid[0] |= 0x02; |
| 546 | } |
| 547 | |
| 548 | printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 549 | sdata->name, bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 550 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 551 | capability = WLAN_CAPABILITY_IBSS; |
| 552 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 553 | if (ifibss->privacy) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 554 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 555 | else |
| 556 | sdata->drop_unencrypted = 0; |
| 557 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 558 | __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int, |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 559 | ifibss->channel, ifibss->basic_rates, |
Johannes Berg | b59066a | 2009-05-12 21:18:38 +0200 | [diff] [blame] | 560 | capability, 0); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 561 | } |
| 562 | |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 563 | /* |
| 564 | * This function is called with state == IEEE80211_IBSS_MLME_SEARCH |
| 565 | */ |
| 566 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 567 | static void ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 568 | { |
| 569 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 570 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 571 | struct cfg80211_bss *cbss; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 572 | struct ieee80211_channel *chan = NULL; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 573 | const u8 *bssid = NULL; |
| 574 | int active_ibss; |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 575 | u16 capability; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 576 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 577 | lockdep_assert_held(&ifibss->mtx); |
| 578 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 579 | active_ibss = ieee80211_sta_active_ibss(sdata); |
| 580 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| 581 | printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 582 | sdata->name, active_ibss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 583 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| 584 | |
| 585 | if (active_ibss) |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 586 | return; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 587 | |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 588 | capability = WLAN_CAPABILITY_IBSS; |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 589 | if (ifibss->privacy) |
Johannes Berg | e0d6188 | 2009-05-12 20:47:32 +0200 | [diff] [blame] | 590 | capability |= WLAN_CAPABILITY_PRIVACY; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 591 | if (ifibss->fixed_bssid) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 592 | bssid = ifibss->bssid; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 593 | if (ifibss->fixed_channel) |
| 594 | chan = ifibss->channel; |
| 595 | if (!is_zero_ether_addr(ifibss->bssid)) |
| 596 | bssid = ifibss->bssid; |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 597 | cbss = cfg80211_get_bss(local->hw.wiphy, chan, bssid, |
| 598 | ifibss->ssid, ifibss->ssid_len, |
| 599 | WLAN_CAPABILITY_IBSS | WLAN_CAPABILITY_PRIVACY, |
| 600 | capability); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 601 | |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 602 | if (cbss) { |
| 603 | struct ieee80211_bss *bss; |
| 604 | |
| 605 | bss = (void *)cbss->priv; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 606 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 607 | printk(KERN_DEBUG " sta_find_ibss: selected %pM current " |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 608 | "%pM\n", cbss->bssid, ifibss->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 609 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| 610 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 611 | printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM" |
| 612 | " based on configured SSID\n", |
Johannes Berg | 0c1ad2c | 2009-12-23 13:15:39 +0100 | [diff] [blame] | 613 | sdata->name, cbss->bssid); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 614 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 615 | ieee80211_sta_join_ibss(sdata, bss); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 616 | ieee80211_rx_bss_put(local, bss); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 617 | return; |
Reinette Chatre | d419b9f | 2009-10-19 14:55:37 -0700 | [diff] [blame] | 618 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 619 | |
| 620 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| 621 | printk(KERN_DEBUG " did not try to join ibss\n"); |
| 622 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| 623 | |
| 624 | /* Selected IBSS not found in current scan results - try to scan */ |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 625 | if (time_after(jiffies, ifibss->last_scan_completed + |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 626 | IEEE80211_SCAN_INTERVAL)) { |
| 627 | printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to " |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 628 | "join\n", sdata->name); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 629 | |
Johannes Berg | be4a4b6 | 2010-05-03 08:49:48 +0200 | [diff] [blame] | 630 | ieee80211_request_internal_scan(sdata, |
| 631 | ifibss->ssid, ifibss->ssid_len, |
| 632 | ifibss->fixed_channel ? ifibss->channel : NULL); |
Benoit Papillault | ce9058a | 2010-01-17 22:45:23 +0100 | [diff] [blame] | 633 | } else { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 634 | int interval = IEEE80211_SCAN_INTERVAL; |
| 635 | |
| 636 | if (time_after(jiffies, ifibss->ibss_join_req + |
| 637 | IEEE80211_IBSS_JOIN_TIMEOUT)) { |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 638 | if (!(local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS)) { |
| 639 | ieee80211_sta_create_ibss(sdata); |
| 640 | return; |
| 641 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 642 | printk(KERN_DEBUG "%s: IBSS not allowed on" |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 643 | " %d MHz\n", sdata->name, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 644 | local->hw.conf.channel->center_freq); |
| 645 | |
| 646 | /* No IBSS found - decrease scan interval and continue |
| 647 | * scanning. */ |
| 648 | interval = IEEE80211_SCAN_INTERVAL_SLOW; |
| 649 | } |
| 650 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 651 | mod_timer(&ifibss->timer, |
| 652 | round_jiffies(jiffies + interval)); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 653 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | 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] | 657 | struct sk_buff *req) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 658 | { |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 659 | struct ieee80211_mgmt *mgmt = (void *)req->data; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 660 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 661 | struct ieee80211_local *local = sdata->local; |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 662 | int tx_last_beacon, len = req->len; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 663 | struct sk_buff *skb; |
| 664 | struct ieee80211_mgmt *resp; |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 665 | struct sk_buff *presp; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 666 | u8 *pos, *end; |
| 667 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 668 | lockdep_assert_held(&ifibss->mtx); |
| 669 | |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 670 | presp = rcu_dereference_protected(ifibss->presp, |
| 671 | lockdep_is_held(&ifibss->mtx)); |
| 672 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 673 | if (ifibss->state != IEEE80211_IBSS_MLME_JOINED || |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 674 | len < 24 + 2 || !presp) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 675 | return; |
| 676 | |
Johannes Berg | 2448798 | 2009-04-23 18:52:52 +0200 | [diff] [blame] | 677 | tx_last_beacon = drv_tx_last_beacon(local); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 678 | |
| 679 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| 680 | printk(KERN_DEBUG "%s: RX ProbeReq SA=%pM DA=%pM BSSID=%pM" |
| 681 | " (tx_last_beacon=%d)\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 682 | sdata->name, mgmt->sa, mgmt->da, |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 683 | mgmt->bssid, tx_last_beacon); |
| 684 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
| 685 | |
Felix Fietkau | 1ed7648 | 2011-03-24 19:46:18 +0100 | [diff] [blame] | 686 | if (!tx_last_beacon && is_multicast_ether_addr(mgmt->da)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 687 | return; |
| 688 | |
| 689 | if (memcmp(mgmt->bssid, ifibss->bssid, ETH_ALEN) != 0 && |
| 690 | memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0) |
| 691 | return; |
| 692 | |
| 693 | end = ((u8 *) mgmt) + len; |
| 694 | pos = mgmt->u.probe_req.variable; |
| 695 | if (pos[0] != WLAN_EID_SSID || |
| 696 | pos + 2 + pos[1] > end) { |
| 697 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| 698 | printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq " |
| 699 | "from %pM\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 700 | sdata->name, mgmt->sa); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 701 | #endif |
| 702 | return; |
| 703 | } |
| 704 | if (pos[1] != 0 && |
| 705 | (pos[1] != ifibss->ssid_len || |
Benoit Papillault | 0da780c | 2010-02-05 01:21:03 +0100 | [diff] [blame] | 706 | memcmp(pos + 2, ifibss->ssid, ifibss->ssid_len))) { |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 707 | /* Ignore ProbeReq for foreign SSID */ |
| 708 | return; |
| 709 | } |
| 710 | |
| 711 | /* Reply with ProbeResp */ |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 712 | skb = skb_copy(presp, GFP_KERNEL); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 713 | if (!skb) |
| 714 | return; |
| 715 | |
| 716 | resp = (struct ieee80211_mgmt *) skb->data; |
| 717 | memcpy(resp->da, mgmt->sa, ETH_ALEN); |
| 718 | #ifdef CONFIG_MAC80211_IBSS_DEBUG |
| 719 | printk(KERN_DEBUG "%s: Sending ProbeResp to %pM\n", |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 720 | sdata->name, resp->da); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 721 | #endif /* CONFIG_MAC80211_IBSS_DEBUG */ |
Johannes Berg | 62ae67b | 2009-11-18 18:42:05 +0100 | [diff] [blame] | 722 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
| 723 | ieee80211_tx_skb(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata, |
| 727 | struct ieee80211_mgmt *mgmt, |
| 728 | size_t len, |
| 729 | struct ieee80211_rx_status *rx_status) |
| 730 | { |
| 731 | size_t baselen; |
| 732 | struct ieee802_11_elems elems; |
| 733 | |
Johannes Berg | 47846c9 | 2009-11-25 17:46:19 +0100 | [diff] [blame] | 734 | if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN)) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 735 | return; /* ignore ProbeResp to foreign address */ |
| 736 | |
| 737 | baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; |
| 738 | if (baselen > len) |
| 739 | return; |
| 740 | |
| 741 | ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, |
| 742 | &elems); |
| 743 | |
| 744 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false); |
| 745 | } |
| 746 | |
| 747 | static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, |
| 748 | struct ieee80211_mgmt *mgmt, |
| 749 | size_t len, |
| 750 | struct ieee80211_rx_status *rx_status) |
| 751 | { |
| 752 | size_t baselen; |
| 753 | struct ieee802_11_elems elems; |
| 754 | |
| 755 | /* Process beacon from the current BSS */ |
| 756 | baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt; |
| 757 | if (baselen > len) |
| 758 | return; |
| 759 | |
| 760 | ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems); |
| 761 | |
| 762 | ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, true); |
| 763 | } |
| 764 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 765 | void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, |
| 766 | struct sk_buff *skb) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 767 | { |
| 768 | struct ieee80211_rx_status *rx_status; |
| 769 | struct ieee80211_mgmt *mgmt; |
| 770 | u16 fc; |
| 771 | |
Johannes Berg | f1d58c2 | 2009-06-17 13:13:00 +0200 | [diff] [blame] | 772 | rx_status = IEEE80211_SKB_RXCB(skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 773 | mgmt = (struct ieee80211_mgmt *) skb->data; |
| 774 | fc = le16_to_cpu(mgmt->frame_control); |
| 775 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 776 | mutex_lock(&sdata->u.ibss.mtx); |
| 777 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 778 | if (!sdata->u.ibss.ssid_len) |
| 779 | goto mgmt_out; /* not ready to merge yet */ |
| 780 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 781 | switch (fc & IEEE80211_FCTL_STYPE) { |
| 782 | case IEEE80211_STYPE_PROBE_REQ: |
Johannes Berg | c269a20 | 2011-02-14 12:20:22 +0100 | [diff] [blame] | 783 | ieee80211_rx_mgmt_probe_req(sdata, skb); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 784 | break; |
| 785 | case IEEE80211_STYPE_PROBE_RESP: |
| 786 | ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, |
| 787 | rx_status); |
| 788 | break; |
| 789 | case IEEE80211_STYPE_BEACON: |
| 790 | ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, |
| 791 | rx_status); |
| 792 | break; |
| 793 | case IEEE80211_STYPE_AUTH: |
| 794 | ieee80211_rx_mgmt_auth_ibss(sdata, mgmt, skb->len); |
| 795 | break; |
| 796 | } |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 797 | |
Tim Harvey | c926d00 | 2010-12-09 10:43:13 -0800 | [diff] [blame] | 798 | mgmt_out: |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 799 | mutex_unlock(&sdata->u.ibss.mtx); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 800 | } |
| 801 | |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 802 | void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata) |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 803 | { |
Johannes Berg | 1fa57d0 | 2010-06-10 10:21:32 +0200 | [diff] [blame] | 804 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 805 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 806 | mutex_lock(&ifibss->mtx); |
| 807 | |
| 808 | /* |
| 809 | * Work could be scheduled after scan or similar |
| 810 | * when we aren't even joined (or trying) with a |
| 811 | * network. |
| 812 | */ |
| 813 | if (!ifibss->ssid_len) |
| 814 | goto out; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 815 | |
| 816 | switch (ifibss->state) { |
| 817 | case IEEE80211_IBSS_MLME_SEARCH: |
| 818 | ieee80211_sta_find_ibss(sdata); |
| 819 | break; |
| 820 | case IEEE80211_IBSS_MLME_JOINED: |
| 821 | ieee80211_sta_merge_ibss(sdata); |
| 822 | break; |
| 823 | default: |
| 824 | WARN_ON(1); |
| 825 | break; |
| 826 | } |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 827 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 828 | out: |
| 829 | mutex_unlock(&ifibss->mtx); |
Johannes Berg | 3a4d4aa | 2010-05-26 16:41:40 +0200 | [diff] [blame] | 830 | } |
| 831 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 832 | static void ieee80211_ibss_timer(unsigned long data) |
| 833 | { |
| 834 | struct ieee80211_sub_if_data *sdata = |
| 835 | (struct ieee80211_sub_if_data *) data; |
| 836 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 837 | struct ieee80211_local *local = sdata->local; |
| 838 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 839 | if (local->quiescing) { |
| 840 | ifibss->timer_running = true; |
| 841 | return; |
| 842 | } |
| 843 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 844 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 845 | } |
| 846 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 847 | #ifdef CONFIG_PM |
| 848 | void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata) |
| 849 | { |
| 850 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 851 | |
Johannes Berg | 5bb644a | 2009-05-17 11:40:42 +0200 | [diff] [blame] | 852 | if (del_timer_sync(&ifibss->timer)) |
| 853 | ifibss->timer_running = true; |
| 854 | } |
| 855 | |
| 856 | void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata) |
| 857 | { |
| 858 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 859 | |
| 860 | if (ifibss->timer_running) { |
| 861 | add_timer(&ifibss->timer); |
| 862 | ifibss->timer_running = false; |
| 863 | } |
| 864 | } |
| 865 | #endif |
| 866 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 867 | void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) |
| 868 | { |
| 869 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 870 | |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 871 | setup_timer(&ifibss->timer, ieee80211_ibss_timer, |
| 872 | (unsigned long) sdata); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 873 | mutex_init(&ifibss->mtx); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 874 | } |
| 875 | |
| 876 | /* scan finished notification */ |
| 877 | void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local) |
| 878 | { |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 879 | struct ieee80211_sub_if_data *sdata; |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 880 | |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 881 | mutex_lock(&local->iflist_mtx); |
| 882 | list_for_each_entry(sdata, &local->interfaces, list) { |
Johannes Berg | 9607e6b | 2009-12-23 13:15:31 +0100 | [diff] [blame] | 883 | if (!ieee80211_sdata_running(sdata)) |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 884 | continue; |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 885 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC) |
| 886 | continue; |
| 887 | sdata->u.ibss.last_scan_completed = jiffies; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 888 | ieee80211_queue_work(&local->hw, &sdata->work); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 889 | } |
Johannes Berg | 29b4a4f | 2009-04-21 00:30:49 +0200 | [diff] [blame] | 890 | mutex_unlock(&local->iflist_mtx); |
Johannes Berg | 4690029 | 2009-02-15 12:44:28 +0100 | [diff] [blame] | 891 | } |
| 892 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 893 | int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, |
| 894 | struct cfg80211_ibss_params *params) |
| 895 | { |
| 896 | struct sk_buff *skb; |
| 897 | |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 898 | skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + |
| 899 | 36 /* bitrates */ + |
| 900 | 34 /* SSID */ + |
| 901 | 3 /* DS params */ + |
| 902 | 4 /* IBSS params */ + |
| 903 | params->ie_len); |
| 904 | if (!skb) |
| 905 | return -ENOMEM; |
| 906 | |
| 907 | mutex_lock(&sdata->u.ibss.mtx); |
| 908 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 909 | if (params->bssid) { |
| 910 | memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); |
| 911 | sdata->u.ibss.fixed_bssid = true; |
| 912 | } else |
| 913 | sdata->u.ibss.fixed_bssid = false; |
| 914 | |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 915 | sdata->u.ibss.privacy = params->privacy; |
Teemu Paasikivi | fbd2c8d | 2010-06-14 12:55:31 +0300 | [diff] [blame] | 916 | sdata->u.ibss.basic_rates = params->basic_rates; |
Felix Fietkau | dd5b4cc | 2010-11-22 20:58:24 +0100 | [diff] [blame] | 917 | memcpy(sdata->vif.bss_conf.mcast_rate, params->mcast_rate, |
| 918 | sizeof(params->mcast_rate)); |
Johannes Berg | fffd093 | 2009-07-08 14:22:54 +0200 | [diff] [blame] | 919 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 920 | sdata->vif.bss_conf.beacon_int = params->beacon_interval; |
| 921 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 922 | sdata->u.ibss.channel = params->channel; |
| 923 | sdata->u.ibss.fixed_channel = params->channel_fixed; |
| 924 | |
Johannes Berg | adfba3c | 2010-05-05 15:33:55 +0200 | [diff] [blame] | 925 | /* fix ourselves to that channel now already */ |
| 926 | if (params->channel_fixed) { |
| 927 | sdata->local->oper_channel = params->channel; |
Johannes Berg | 0aaffa9 | 2010-05-05 15:28:27 +0200 | [diff] [blame] | 928 | WARN_ON(!ieee80211_set_channel_type(sdata->local, sdata, |
| 929 | NL80211_CHAN_NO_HT)); |
Johannes Berg | adfba3c | 2010-05-05 15:33:55 +0200 | [diff] [blame] | 930 | } |
| 931 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 932 | if (params->ie) { |
| 933 | sdata->u.ibss.ie = kmemdup(params->ie, params->ie_len, |
| 934 | GFP_KERNEL); |
| 935 | if (sdata->u.ibss.ie) |
| 936 | sdata->u.ibss.ie_len = params->ie_len; |
| 937 | } |
| 938 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 939 | sdata->u.ibss.skb = skb; |
| 940 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
| 941 | sdata->u.ibss.ibss_join_req = jiffies; |
| 942 | |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 943 | memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN); |
Johannes Berg | 0e41f71 | 2009-04-23 11:48:56 +0200 | [diff] [blame] | 944 | sdata->u.ibss.ssid_len = params->ssid_len; |
| 945 | |
Johannes Berg | 7da7cc1 | 2010-08-05 17:02:38 +0200 | [diff] [blame] | 946 | mutex_unlock(&sdata->u.ibss.mtx); |
| 947 | |
| 948 | mutex_lock(&sdata->local->mtx); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 949 | ieee80211_recalc_idle(sdata->local); |
Johannes Berg | 7da7cc1 | 2010-08-05 17:02:38 +0200 | [diff] [blame] | 950 | mutex_unlock(&sdata->local->mtx); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 951 | |
Johannes Berg | 64592c8 | 2010-06-10 10:21:31 +0200 | [diff] [blame] | 952 | ieee80211_queue_work(&sdata->local->hw, &sdata->work); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 953 | |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) |
| 958 | { |
| 959 | struct sk_buff *skb; |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 960 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
| 961 | struct ieee80211_local *local = sdata->local; |
| 962 | struct cfg80211_bss *cbss; |
| 963 | u16 capability; |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 964 | int active_ibss; |
| 965 | |
| 966 | mutex_lock(&sdata->u.ibss.mtx); |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 967 | |
Johannes Berg | f3209be | 2011-06-08 13:27:29 +0200 | [diff] [blame] | 968 | sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH; |
| 969 | memset(sdata->u.ibss.bssid, 0, ETH_ALEN); |
| 970 | sdata->u.ibss.ssid_len = 0; |
| 971 | |
Teemu Paasikivi | 5ea096c | 2010-06-14 12:55:33 +0300 | [diff] [blame] | 972 | active_ibss = ieee80211_sta_active_ibss(sdata); |
| 973 | |
| 974 | if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { |
| 975 | capability = WLAN_CAPABILITY_IBSS; |
| 976 | |
| 977 | if (ifibss->privacy) |
| 978 | capability |= WLAN_CAPABILITY_PRIVACY; |
| 979 | |
| 980 | cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->channel, |
| 981 | ifibss->bssid, ifibss->ssid, |
| 982 | ifibss->ssid_len, WLAN_CAPABILITY_IBSS | |
| 983 | WLAN_CAPABILITY_PRIVACY, |
| 984 | capability); |
| 985 | |
| 986 | if (cbss) { |
| 987 | cfg80211_unlink_bss(local->hw.wiphy, cbss); |
| 988 | cfg80211_put_bss(cbss); |
| 989 | } |
| 990 | } |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 991 | |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 992 | sta_info_flush(sdata->local, sdata); |
| 993 | |
| 994 | /* remove beacon */ |
| 995 | kfree(sdata->u.ibss.ie); |
Johannes Berg | 40b275b | 2011-05-13 14:15:49 +0200 | [diff] [blame] | 996 | skb = rcu_dereference_protected(sdata->u.ibss.presp, |
| 997 | lockdep_is_held(&sdata->u.ibss.mtx)); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 998 | RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); |
Johannes Berg | 8fc214b | 2010-04-28 17:40:43 +0200 | [diff] [blame] | 999 | sdata->vif.bss_conf.ibss_joined = false; |
| 1000 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | |
| 1001 | BSS_CHANGED_IBSS); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1002 | synchronize_rcu(); |
| 1003 | kfree_skb(skb); |
| 1004 | |
Johannes Berg | 35f20c1 | 2010-06-10 10:21:30 +0200 | [diff] [blame] | 1005 | skb_queue_purge(&sdata->skb_queue); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1006 | |
Johannes Berg | bc05d19 | 2010-07-21 10:52:40 +0200 | [diff] [blame] | 1007 | del_timer_sync(&sdata->u.ibss.timer); |
Johannes Berg | 7a17a33 | 2010-07-21 11:30:27 +0200 | [diff] [blame] | 1008 | |
| 1009 | mutex_unlock(&sdata->u.ibss.mtx); |
Johannes Berg | bc05d19 | 2010-07-21 10:52:40 +0200 | [diff] [blame] | 1010 | |
Johannes Berg | 7da7cc1 | 2010-08-05 17:02:38 +0200 | [diff] [blame] | 1011 | mutex_lock(&local->mtx); |
Johannes Berg | 5cff20e | 2009-04-29 12:26:17 +0200 | [diff] [blame] | 1012 | ieee80211_recalc_idle(sdata->local); |
Johannes Berg | 7da7cc1 | 2010-08-05 17:02:38 +0200 | [diff] [blame] | 1013 | mutex_unlock(&local->mtx); |
Johannes Berg | af8cdcd | 2009-04-19 21:25:43 +0200 | [diff] [blame] | 1014 | |
| 1015 | return 0; |
| 1016 | } |