Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1 | /* |
| 2 | * mac80211 TDLS handling code |
| 3 | * |
| 4 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
| 5 | * Copyright 2014, Intel Corporation |
Johannes Berg | d98ad83 | 2014-09-03 15:24:57 +0300 | [diff] [blame^] | 6 | * Copyright 2014 Intel Mobile Communications GmbH |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 7 | * |
| 8 | * This file is GPLv2 as found in COPYING. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/ieee80211.h> |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 12 | #include <linux/log2.h> |
Arik Nemtsov | c887f0d3 | 2014-06-11 17:18:25 +0300 | [diff] [blame] | 13 | #include <net/cfg80211.h> |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 14 | #include "ieee80211_i.h" |
Arik Nemtsov | ee10f2c | 2014-06-11 17:18:27 +0300 | [diff] [blame] | 15 | #include "driver-ops.h" |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 16 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 17 | /* give usermode some time for retries in setting up the TDLS session */ |
| 18 | #define TDLS_PEER_SETUP_TIMEOUT (15 * HZ) |
| 19 | |
| 20 | void ieee80211_tdls_peer_del_work(struct work_struct *wk) |
| 21 | { |
| 22 | struct ieee80211_sub_if_data *sdata; |
| 23 | struct ieee80211_local *local; |
| 24 | |
| 25 | sdata = container_of(wk, struct ieee80211_sub_if_data, |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 26 | u.mgd.tdls_peer_del_work.work); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 27 | local = sdata->local; |
| 28 | |
| 29 | mutex_lock(&local->mtx); |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 30 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) { |
| 31 | tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer); |
| 32 | sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer); |
| 33 | eth_zero_addr(sdata->u.mgd.tdls_peer); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 34 | } |
| 35 | mutex_unlock(&local->mtx); |
| 36 | } |
| 37 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 38 | static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb) |
| 39 | { |
| 40 | u8 *pos = (void *)skb_put(skb, 7); |
| 41 | |
| 42 | *pos++ = WLAN_EID_EXT_CAPABILITY; |
| 43 | *pos++ = 5; /* len */ |
| 44 | *pos++ = 0x0; |
| 45 | *pos++ = 0x0; |
| 46 | *pos++ = 0x0; |
| 47 | *pos++ = 0x0; |
| 48 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; |
| 49 | } |
| 50 | |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 51 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
| 52 | u16 status_code) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 53 | { |
| 54 | struct ieee80211_local *local = sdata->local; |
| 55 | u16 capab; |
| 56 | |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 57 | /* The capability will be 0 when sending a failure code */ |
| 58 | if (status_code != 0) |
| 59 | return 0; |
| 60 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 61 | capab = 0; |
| 62 | if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ) |
| 63 | return capab; |
| 64 | |
| 65 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) |
| 66 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
| 67 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) |
| 68 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
| 69 | |
| 70 | return capab; |
| 71 | } |
| 72 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 73 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
| 74 | struct sk_buff *skb, const u8 *peer, |
| 75 | bool initiator) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 76 | { |
| 77 | struct ieee80211_tdls_lnkie *lnkid; |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 78 | const u8 *init_addr, *rsp_addr; |
| 79 | |
| 80 | if (initiator) { |
| 81 | init_addr = sdata->vif.addr; |
| 82 | rsp_addr = peer; |
| 83 | } else { |
| 84 | init_addr = peer; |
| 85 | rsp_addr = sdata->vif.addr; |
| 86 | } |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 87 | |
| 88 | lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); |
| 89 | |
| 90 | lnkid->ie_type = WLAN_EID_LINK_ID; |
| 91 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; |
| 92 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 93 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
| 94 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); |
| 95 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 96 | } |
| 97 | |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 98 | /* translate numbering in the WMM parameter IE to the mac80211 notation */ |
| 99 | static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac) |
| 100 | { |
| 101 | switch (ac) { |
| 102 | default: |
| 103 | WARN_ON_ONCE(1); |
| 104 | case 0: |
| 105 | return IEEE80211_AC_BE; |
| 106 | case 1: |
| 107 | return IEEE80211_AC_BK; |
| 108 | case 2: |
| 109 | return IEEE80211_AC_VI; |
| 110 | case 3: |
| 111 | return IEEE80211_AC_VO; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci) |
| 116 | { |
| 117 | u8 ret; |
| 118 | |
| 119 | ret = aifsn & 0x0f; |
| 120 | if (acm) |
| 121 | ret |= 0x10; |
| 122 | ret |= (aci << 5) & 0x60; |
| 123 | return ret; |
| 124 | } |
| 125 | |
| 126 | static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max) |
| 127 | { |
| 128 | return ((ilog2(cw_min + 1) << 0x0) & 0x0f) | |
| 129 | ((ilog2(cw_max + 1) << 0x4) & 0xf0); |
| 130 | } |
| 131 | |
| 132 | static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata, |
| 133 | struct sk_buff *skb) |
| 134 | { |
| 135 | struct ieee80211_wmm_param_ie *wmm; |
| 136 | struct ieee80211_tx_queue_params *txq; |
| 137 | int i; |
| 138 | |
| 139 | wmm = (void *)skb_put(skb, sizeof(*wmm)); |
| 140 | memset(wmm, 0, sizeof(*wmm)); |
| 141 | |
| 142 | wmm->element_id = WLAN_EID_VENDOR_SPECIFIC; |
| 143 | wmm->len = sizeof(*wmm) - 2; |
| 144 | |
| 145 | wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */ |
| 146 | wmm->oui[1] = 0x50; |
| 147 | wmm->oui[2] = 0xf2; |
| 148 | wmm->oui_type = 2; /* WME */ |
| 149 | wmm->oui_subtype = 1; /* WME param */ |
| 150 | wmm->version = 1; /* WME ver */ |
| 151 | wmm->qos_info = 0; /* U-APSD not in use */ |
| 152 | |
| 153 | /* |
| 154 | * Use the EDCA parameters defined for the BSS, or default if the AP |
| 155 | * doesn't support it, as mandated by 802.11-2012 section 10.22.4 |
| 156 | */ |
| 157 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 158 | txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)]; |
| 159 | wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs, |
| 160 | txq->acm, i); |
| 161 | wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max); |
| 162 | wmm->ac[i].txop_limit = cpu_to_le16(txq->txop); |
| 163 | } |
| 164 | } |
| 165 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 166 | static void |
| 167 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, |
| 168 | struct sk_buff *skb, const u8 *peer, |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 169 | u8 action_code, bool initiator, |
| 170 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 171 | { |
| 172 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
Arik Nemtsov | 40b861a | 2014-07-17 17:14:23 +0300 | [diff] [blame] | 173 | struct ieee80211_local *local = sdata->local; |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 174 | struct ieee80211_supported_band *sband; |
| 175 | struct ieee80211_sta_ht_cap ht_cap; |
| 176 | struct sta_info *sta = NULL; |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 177 | size_t offset = 0, noffset; |
| 178 | u8 *pos; |
| 179 | |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 180 | rcu_read_lock(); |
| 181 | |
| 182 | /* we should have the peer STA if we're already responding */ |
| 183 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { |
| 184 | sta = sta_info_get(sdata, peer); |
| 185 | if (WARN_ON_ONCE(!sta)) { |
| 186 | rcu_read_unlock(); |
| 187 | return; |
| 188 | } |
| 189 | } |
| 190 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 191 | ieee80211_add_srates_ie(sdata, skb, false, band); |
| 192 | ieee80211_add_ext_srates_ie(sdata, skb, false, band); |
| 193 | |
| 194 | /* add any custom IEs that go before Extended Capabilities */ |
| 195 | if (extra_ies_len) { |
| 196 | static const u8 before_ext_cap[] = { |
| 197 | WLAN_EID_SUPP_RATES, |
| 198 | WLAN_EID_COUNTRY, |
| 199 | WLAN_EID_EXT_SUPP_RATES, |
| 200 | WLAN_EID_SUPPORTED_CHANNELS, |
| 201 | WLAN_EID_RSN, |
| 202 | }; |
| 203 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 204 | before_ext_cap, |
| 205 | ARRAY_SIZE(before_ext_cap), |
| 206 | offset); |
| 207 | pos = skb_put(skb, noffset - offset); |
| 208 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 209 | offset = noffset; |
| 210 | } |
| 211 | |
| 212 | ieee80211_tdls_add_ext_capab(skb); |
| 213 | |
Arik Nemtsov | 40b861a | 2014-07-17 17:14:23 +0300 | [diff] [blame] | 214 | /* add the QoS element if we support it */ |
| 215 | if (local->hw.queues >= IEEE80211_NUM_ACS && |
| 216 | action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES) |
| 217 | ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */ |
| 218 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 219 | /* add any custom IEs that go before HT capabilities */ |
| 220 | if (extra_ies_len) { |
| 221 | static const u8 before_ht_cap[] = { |
| 222 | WLAN_EID_SUPP_RATES, |
| 223 | WLAN_EID_COUNTRY, |
| 224 | WLAN_EID_EXT_SUPP_RATES, |
| 225 | WLAN_EID_SUPPORTED_CHANNELS, |
| 226 | WLAN_EID_RSN, |
| 227 | WLAN_EID_EXT_CAPABILITY, |
| 228 | WLAN_EID_QOS_CAPA, |
| 229 | WLAN_EID_FAST_BSS_TRANSITION, |
| 230 | WLAN_EID_TIMEOUT_INTERVAL, |
| 231 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| 232 | }; |
| 233 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 234 | before_ht_cap, |
| 235 | ARRAY_SIZE(before_ht_cap), |
| 236 | offset); |
| 237 | pos = skb_put(skb, noffset - offset); |
| 238 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 239 | offset = noffset; |
| 240 | } |
| 241 | |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 242 | /* |
| 243 | * with TDLS we can switch channels, and HT-caps are not necessarily |
| 244 | * the same on all bands. The specification limits the setup to a |
| 245 | * single HT-cap, so use the current band for now. |
| 246 | */ |
| 247 | sband = local->hw.wiphy->bands[band]; |
| 248 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
| 249 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
| 250 | action_code == WLAN_TDLS_SETUP_RESPONSE) && |
| 251 | ht_cap.ht_supported && (!sta || sta->sta.ht_cap.ht_supported)) { |
| 252 | if (action_code == WLAN_TDLS_SETUP_REQUEST) { |
| 253 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
| 254 | |
| 255 | /* disable SMPS in TDLS initiator */ |
| 256 | ht_cap.cap |= (WLAN_HT_CAP_SM_PS_DISABLED |
| 257 | << IEEE80211_HT_CAP_SM_PS_SHIFT); |
| 258 | } else { |
| 259 | /* disable SMPS in TDLS responder */ |
| 260 | sta->sta.ht_cap.cap |= |
| 261 | (WLAN_HT_CAP_SM_PS_DISABLED |
| 262 | << IEEE80211_HT_CAP_SM_PS_SHIFT); |
| 263 | |
| 264 | /* the peer caps are already intersected with our own */ |
| 265 | memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap)); |
| 266 | } |
| 267 | |
| 268 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); |
| 269 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); |
| 270 | } |
| 271 | |
| 272 | rcu_read_unlock(); |
| 273 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 274 | /* add any remaining IEs */ |
| 275 | if (extra_ies_len) { |
| 276 | noffset = extra_ies_len; |
| 277 | pos = skb_put(skb, noffset - offset); |
| 278 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 279 | } |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 280 | |
| 281 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 282 | } |
| 283 | |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 284 | static void |
| 285 | ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, |
| 286 | struct sk_buff *skb, const u8 *peer, |
| 287 | bool initiator, const u8 *extra_ies, |
| 288 | size_t extra_ies_len) |
| 289 | { |
| 290 | struct ieee80211_local *local = sdata->local; |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 291 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 292 | size_t offset = 0, noffset; |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 293 | struct sta_info *sta, *ap_sta; |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 294 | u8 *pos; |
| 295 | |
| 296 | rcu_read_lock(); |
| 297 | |
| 298 | sta = sta_info_get(sdata, peer); |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 299 | ap_sta = sta_info_get(sdata, ifmgd->bssid); |
| 300 | if (WARN_ON_ONCE(!sta || !ap_sta)) { |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 301 | rcu_read_unlock(); |
| 302 | return; |
| 303 | } |
| 304 | |
| 305 | /* add any custom IEs that go before the QoS IE */ |
| 306 | if (extra_ies_len) { |
| 307 | static const u8 before_qos[] = { |
| 308 | WLAN_EID_RSN, |
| 309 | }; |
| 310 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 311 | before_qos, |
| 312 | ARRAY_SIZE(before_qos), |
| 313 | offset); |
| 314 | pos = skb_put(skb, noffset - offset); |
| 315 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 316 | offset = noffset; |
| 317 | } |
| 318 | |
| 319 | /* add the QoS param IE if both the peer and we support it */ |
Johannes Berg | a74a8c8 | 2014-07-22 14:50:47 +0200 | [diff] [blame] | 320 | if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme) |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 321 | ieee80211_tdls_add_wmm_param_ie(sdata, skb); |
| 322 | |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 323 | /* add any custom IEs that go before HT operation */ |
| 324 | if (extra_ies_len) { |
| 325 | static const u8 before_ht_op[] = { |
| 326 | WLAN_EID_RSN, |
| 327 | WLAN_EID_QOS_CAPA, |
| 328 | WLAN_EID_FAST_BSS_TRANSITION, |
| 329 | WLAN_EID_TIMEOUT_INTERVAL, |
| 330 | }; |
| 331 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 332 | before_ht_op, |
| 333 | ARRAY_SIZE(before_ht_op), |
| 334 | offset); |
| 335 | pos = skb_put(skb, noffset - offset); |
| 336 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 337 | offset = noffset; |
| 338 | } |
| 339 | |
| 340 | /* if HT support is only added in TDLS, we need an HT-operation IE */ |
| 341 | if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { |
| 342 | struct ieee80211_chanctx_conf *chanctx_conf = |
| 343 | rcu_dereference(sdata->vif.chanctx_conf); |
| 344 | if (!WARN_ON(!chanctx_conf)) { |
| 345 | pos = skb_put(skb, 2 + |
| 346 | sizeof(struct ieee80211_ht_operation)); |
| 347 | /* send an empty HT operation IE */ |
| 348 | ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap, |
| 349 | &chanctx_conf->def, 0); |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | rcu_read_unlock(); |
| 354 | |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 355 | /* add any remaining IEs */ |
| 356 | if (extra_ies_len) { |
| 357 | noffset = extra_ies_len; |
| 358 | pos = skb_put(skb, noffset - offset); |
| 359 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 360 | } |
| 361 | |
| 362 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 363 | } |
| 364 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 365 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
| 366 | struct sk_buff *skb, const u8 *peer, |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 367 | u8 action_code, u16 status_code, |
| 368 | bool initiator, const u8 *extra_ies, |
| 369 | size_t extra_ies_len) |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 370 | { |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 371 | switch (action_code) { |
| 372 | case WLAN_TDLS_SETUP_REQUEST: |
| 373 | case WLAN_TDLS_SETUP_RESPONSE: |
| 374 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 375 | if (status_code == 0) |
| 376 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, |
| 377 | action_code, |
| 378 | initiator, |
| 379 | extra_ies, |
| 380 | extra_ies_len); |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 381 | break; |
| 382 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 383 | if (status_code == 0) |
| 384 | ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer, |
| 385 | initiator, extra_ies, |
| 386 | extra_ies_len); |
| 387 | break; |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 388 | case WLAN_TDLS_TEARDOWN: |
| 389 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 390 | if (extra_ies_len) |
| 391 | memcpy(skb_put(skb, extra_ies_len), extra_ies, |
| 392 | extra_ies_len); |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 393 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
| 394 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 395 | break; |
| 396 | } |
| 397 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 398 | } |
| 399 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 400 | static int |
| 401 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 402 | const u8 *peer, u8 action_code, u8 dialog_token, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 403 | u16 status_code, struct sk_buff *skb) |
| 404 | { |
| 405 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 406 | struct ieee80211_tdls_data *tf; |
| 407 | |
| 408 | tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); |
| 409 | |
| 410 | memcpy(tf->da, peer, ETH_ALEN); |
| 411 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); |
| 412 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); |
| 413 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; |
| 414 | |
| 415 | switch (action_code) { |
| 416 | case WLAN_TDLS_SETUP_REQUEST: |
| 417 | tf->category = WLAN_CATEGORY_TDLS; |
| 418 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; |
| 419 | |
| 420 | skb_put(skb, sizeof(tf->u.setup_req)); |
| 421 | tf->u.setup_req.dialog_token = dialog_token; |
| 422 | tf->u.setup_req.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 423 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 424 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 425 | break; |
| 426 | case WLAN_TDLS_SETUP_RESPONSE: |
| 427 | tf->category = WLAN_CATEGORY_TDLS; |
| 428 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; |
| 429 | |
| 430 | skb_put(skb, sizeof(tf->u.setup_resp)); |
| 431 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); |
| 432 | tf->u.setup_resp.dialog_token = dialog_token; |
| 433 | tf->u.setup_resp.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 434 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 435 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 436 | break; |
| 437 | case WLAN_TDLS_SETUP_CONFIRM: |
| 438 | tf->category = WLAN_CATEGORY_TDLS; |
| 439 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; |
| 440 | |
| 441 | skb_put(skb, sizeof(tf->u.setup_cfm)); |
| 442 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); |
| 443 | tf->u.setup_cfm.dialog_token = dialog_token; |
| 444 | break; |
| 445 | case WLAN_TDLS_TEARDOWN: |
| 446 | tf->category = WLAN_CATEGORY_TDLS; |
| 447 | tf->action_code = WLAN_TDLS_TEARDOWN; |
| 448 | |
| 449 | skb_put(skb, sizeof(tf->u.teardown)); |
| 450 | tf->u.teardown.reason_code = cpu_to_le16(status_code); |
| 451 | break; |
| 452 | case WLAN_TDLS_DISCOVERY_REQUEST: |
| 453 | tf->category = WLAN_CATEGORY_TDLS; |
| 454 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; |
| 455 | |
| 456 | skb_put(skb, sizeof(tf->u.discover_req)); |
| 457 | tf->u.discover_req.dialog_token = dialog_token; |
| 458 | break; |
| 459 | default: |
| 460 | return -EINVAL; |
| 461 | } |
| 462 | |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static int |
| 467 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 468 | const u8 *peer, u8 action_code, u8 dialog_token, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 469 | u16 status_code, struct sk_buff *skb) |
| 470 | { |
| 471 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 472 | struct ieee80211_mgmt *mgmt; |
| 473 | |
| 474 | mgmt = (void *)skb_put(skb, 24); |
| 475 | memset(mgmt, 0, 24); |
| 476 | memcpy(mgmt->da, peer, ETH_ALEN); |
| 477 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 478 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
| 479 | |
| 480 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 481 | IEEE80211_STYPE_ACTION); |
| 482 | |
| 483 | switch (action_code) { |
| 484 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 485 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); |
| 486 | mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; |
| 487 | mgmt->u.action.u.tdls_discover_resp.action_code = |
| 488 | WLAN_PUB_ACTION_TDLS_DISCOVER_RES; |
| 489 | mgmt->u.action.u.tdls_discover_resp.dialog_token = |
| 490 | dialog_token; |
| 491 | mgmt->u.action.u.tdls_discover_resp.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 492 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 493 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 494 | break; |
| 495 | default: |
| 496 | return -EINVAL; |
| 497 | } |
| 498 | |
| 499 | return 0; |
| 500 | } |
| 501 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 502 | static int |
| 503 | ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev, |
| 504 | const u8 *peer, u8 action_code, |
| 505 | u8 dialog_token, u16 status_code, |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 506 | u32 peer_capability, bool initiator, |
| 507 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 508 | { |
| 509 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 510 | struct ieee80211_local *local = sdata->local; |
| 511 | struct sk_buff *skb = NULL; |
| 512 | bool send_direct; |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 513 | struct sta_info *sta; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 514 | int ret; |
| 515 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 516 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| 517 | max(sizeof(struct ieee80211_mgmt), |
| 518 | sizeof(struct ieee80211_tdls_data)) + |
| 519 | 50 + /* supported rates */ |
| 520 | 7 + /* ext capab */ |
Arik Nemtsov | 40b861a | 2014-07-17 17:14:23 +0300 | [diff] [blame] | 521 | 26 + /* max(WMM-info, WMM-param) */ |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 522 | 2 + max(sizeof(struct ieee80211_ht_cap), |
| 523 | sizeof(struct ieee80211_ht_operation)) + |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 524 | extra_ies_len + |
| 525 | sizeof(struct ieee80211_tdls_lnkie)); |
| 526 | if (!skb) |
| 527 | return -ENOMEM; |
| 528 | |
| 529 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 530 | |
| 531 | switch (action_code) { |
| 532 | case WLAN_TDLS_SETUP_REQUEST: |
| 533 | case WLAN_TDLS_SETUP_RESPONSE: |
| 534 | case WLAN_TDLS_SETUP_CONFIRM: |
| 535 | case WLAN_TDLS_TEARDOWN: |
| 536 | case WLAN_TDLS_DISCOVERY_REQUEST: |
| 537 | ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer, |
| 538 | action_code, dialog_token, |
| 539 | status_code, skb); |
| 540 | send_direct = false; |
| 541 | break; |
| 542 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 543 | ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code, |
| 544 | dialog_token, status_code, |
| 545 | skb); |
| 546 | send_direct = true; |
| 547 | break; |
| 548 | default: |
| 549 | ret = -ENOTSUPP; |
| 550 | break; |
| 551 | } |
| 552 | |
| 553 | if (ret < 0) |
| 554 | goto fail; |
| 555 | |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 556 | rcu_read_lock(); |
| 557 | sta = sta_info_get(sdata, peer); |
| 558 | |
| 559 | /* infer the initiator if we can, to support old userspace */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 560 | switch (action_code) { |
| 561 | case WLAN_TDLS_SETUP_REQUEST: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 562 | if (sta) |
| 563 | set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
| 564 | /* fall-through */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 565 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 566 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 567 | initiator = true; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 568 | break; |
| 569 | case WLAN_TDLS_SETUP_RESPONSE: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 570 | /* |
| 571 | * In some testing scenarios, we send a request and response. |
| 572 | * Make the last packet sent take effect for the initiator |
| 573 | * value. |
| 574 | */ |
| 575 | if (sta) |
| 576 | clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
| 577 | /* fall-through */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 578 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 579 | initiator = false; |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 580 | break; |
| 581 | case WLAN_TDLS_TEARDOWN: |
| 582 | /* any value is ok */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 583 | break; |
| 584 | default: |
| 585 | ret = -ENOTSUPP; |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 586 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 587 | } |
| 588 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 589 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR)) |
| 590 | initiator = true; |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 591 | |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 592 | rcu_read_unlock(); |
| 593 | if (ret < 0) |
| 594 | goto fail; |
| 595 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 596 | ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code, |
| 597 | initiator, extra_ies, extra_ies_len); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 598 | if (send_direct) { |
| 599 | ieee80211_tx_skb(sdata, skb); |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | /* |
| 604 | * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise |
| 605 | * we should default to AC_VI. |
| 606 | */ |
| 607 | switch (action_code) { |
| 608 | case WLAN_TDLS_SETUP_REQUEST: |
| 609 | case WLAN_TDLS_SETUP_RESPONSE: |
| 610 | skb_set_queue_mapping(skb, IEEE80211_AC_BK); |
| 611 | skb->priority = 2; |
| 612 | break; |
| 613 | default: |
| 614 | skb_set_queue_mapping(skb, IEEE80211_AC_VI); |
| 615 | skb->priority = 5; |
| 616 | break; |
| 617 | } |
| 618 | |
| 619 | /* disable bottom halves when entering the Tx path */ |
| 620 | local_bh_disable(); |
| 621 | ret = ieee80211_subif_start_xmit(skb, dev); |
| 622 | local_bh_enable(); |
| 623 | |
| 624 | return ret; |
| 625 | |
| 626 | fail: |
| 627 | dev_kfree_skb(skb); |
| 628 | return ret; |
| 629 | } |
| 630 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 631 | static int |
| 632 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, |
| 633 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 634 | u16 status_code, u32 peer_capability, bool initiator, |
| 635 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 636 | { |
| 637 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 638 | struct ieee80211_local *local = sdata->local; |
| 639 | int ret; |
| 640 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 641 | mutex_lock(&local->mtx); |
| 642 | |
| 643 | /* we don't support concurrent TDLS peer setups */ |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 644 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) && |
| 645 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 646 | ret = -EBUSY; |
| 647 | goto exit; |
| 648 | } |
| 649 | |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 650 | /* |
| 651 | * make sure we have a STA representing the peer so we drop or buffer |
| 652 | * non-TDLS-setup frames to the peer. We can't send other packets |
Arik Nemtsov | 6ae32e5 | 2014-07-17 17:14:18 +0300 | [diff] [blame] | 653 | * during setup through the AP path. |
| 654 | * Allow error packets to be sent - sometimes we don't even add a STA |
| 655 | * before failing the setup. |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 656 | */ |
Arik Nemtsov | 6ae32e5 | 2014-07-17 17:14:18 +0300 | [diff] [blame] | 657 | if (status_code == 0) { |
| 658 | rcu_read_lock(); |
| 659 | if (!sta_info_get(sdata, peer)) { |
| 660 | rcu_read_unlock(); |
| 661 | ret = -ENOLINK; |
| 662 | goto exit; |
| 663 | } |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 664 | rcu_read_unlock(); |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 665 | } |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 666 | |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 667 | ieee80211_flush_queues(local, sdata); |
| 668 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 669 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
| 670 | dialog_token, status_code, |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 671 | peer_capability, initiator, |
| 672 | extra_ies, extra_ies_len); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 673 | if (ret < 0) |
| 674 | goto exit; |
| 675 | |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 676 | memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN); |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 677 | ieee80211_queue_delayed_work(&sdata->local->hw, |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 678 | &sdata->u.mgd.tdls_peer_del_work, |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 679 | TDLS_PEER_SETUP_TIMEOUT); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 680 | |
| 681 | exit: |
| 682 | mutex_unlock(&local->mtx); |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 683 | return ret; |
| 684 | } |
| 685 | |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 686 | static int |
| 687 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, |
| 688 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 689 | u16 status_code, u32 peer_capability, |
| 690 | bool initiator, const u8 *extra_ies, |
| 691 | size_t extra_ies_len) |
| 692 | { |
| 693 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 694 | struct ieee80211_local *local = sdata->local; |
| 695 | struct sta_info *sta; |
| 696 | int ret; |
| 697 | |
| 698 | /* |
| 699 | * No packets can be transmitted to the peer via the AP during setup - |
| 700 | * the STA is set as a TDLS peer, but is not authorized. |
| 701 | * During teardown, we prevent direct transmissions by stopping the |
| 702 | * queues and flushing all direct packets. |
| 703 | */ |
| 704 | ieee80211_stop_vif_queues(local, sdata, |
| 705 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); |
| 706 | ieee80211_flush_queues(local, sdata); |
| 707 | |
| 708 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
| 709 | dialog_token, status_code, |
| 710 | peer_capability, initiator, |
| 711 | extra_ies, extra_ies_len); |
| 712 | if (ret < 0) |
| 713 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", |
| 714 | ret); |
| 715 | |
| 716 | /* |
| 717 | * Remove the STA AUTH flag to force further traffic through the AP. If |
| 718 | * the STA was unreachable, it was already removed. |
| 719 | */ |
| 720 | rcu_read_lock(); |
| 721 | sta = sta_info_get(sdata, peer); |
| 722 | if (sta) |
| 723 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
| 724 | rcu_read_unlock(); |
| 725 | |
| 726 | ieee80211_wake_vif_queues(local, sdata, |
| 727 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); |
| 728 | |
| 729 | return 0; |
| 730 | } |
| 731 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 732 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
| 733 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 734 | u16 status_code, u32 peer_capability, |
| 735 | bool initiator, const u8 *extra_ies, |
| 736 | size_t extra_ies_len) |
| 737 | { |
| 738 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 739 | int ret; |
| 740 | |
| 741 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) |
| 742 | return -ENOTSUPP; |
| 743 | |
| 744 | /* make sure we are in managed mode, and associated */ |
| 745 | if (sdata->vif.type != NL80211_IFTYPE_STATION || |
| 746 | !sdata->u.mgd.associated) |
| 747 | return -EINVAL; |
| 748 | |
| 749 | switch (action_code) { |
| 750 | case WLAN_TDLS_SETUP_REQUEST: |
| 751 | case WLAN_TDLS_SETUP_RESPONSE: |
| 752 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, |
| 753 | dialog_token, status_code, |
| 754 | peer_capability, initiator, |
| 755 | extra_ies, extra_ies_len); |
| 756 | break; |
| 757 | case WLAN_TDLS_TEARDOWN: |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 758 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
| 759 | action_code, dialog_token, |
| 760 | status_code, |
| 761 | peer_capability, initiator, |
| 762 | extra_ies, extra_ies_len); |
| 763 | break; |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 764 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | ee10f2c | 2014-06-11 17:18:27 +0300 | [diff] [blame] | 765 | /* |
| 766 | * Protect the discovery so we can hear the TDLS discovery |
| 767 | * response frame. It is transmitted directly and not buffered |
| 768 | * by the AP. |
| 769 | */ |
| 770 | drv_mgd_protect_tdls_discover(sdata->local, sdata); |
| 771 | /* fall-through */ |
| 772 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 773 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 774 | /* no special handling */ |
| 775 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, |
| 776 | action_code, |
| 777 | dialog_token, |
| 778 | status_code, |
| 779 | peer_capability, |
| 780 | initiator, extra_ies, |
| 781 | extra_ies_len); |
| 782 | break; |
| 783 | default: |
| 784 | ret = -EOPNOTSUPP; |
| 785 | break; |
| 786 | } |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 787 | |
| 788 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", |
| 789 | action_code, peer, ret); |
| 790 | return ret; |
| 791 | } |
| 792 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 793 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 794 | const u8 *peer, enum nl80211_tdls_operation oper) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 795 | { |
| 796 | struct sta_info *sta; |
| 797 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 798 | struct ieee80211_local *local = sdata->local; |
| 799 | int ret; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 800 | |
| 801 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) |
| 802 | return -ENOTSUPP; |
| 803 | |
| 804 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 805 | return -EINVAL; |
| 806 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 807 | switch (oper) { |
| 808 | case NL80211_TDLS_ENABLE_LINK: |
| 809 | case NL80211_TDLS_DISABLE_LINK: |
| 810 | break; |
| 811 | case NL80211_TDLS_TEARDOWN: |
| 812 | case NL80211_TDLS_SETUP: |
| 813 | case NL80211_TDLS_DISCOVERY_REQ: |
| 814 | /* We don't support in-driver setup/teardown/discovery */ |
| 815 | return -ENOTSUPP; |
| 816 | } |
| 817 | |
| 818 | mutex_lock(&local->mtx); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 819 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
| 820 | |
| 821 | switch (oper) { |
| 822 | case NL80211_TDLS_ENABLE_LINK: |
| 823 | rcu_read_lock(); |
| 824 | sta = sta_info_get(sdata, peer); |
| 825 | if (!sta) { |
| 826 | rcu_read_unlock(); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 827 | ret = -ENOLINK; |
| 828 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
| 832 | rcu_read_unlock(); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 833 | |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 834 | WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) || |
| 835 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 836 | ret = 0; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 837 | break; |
| 838 | case NL80211_TDLS_DISABLE_LINK: |
Liad Kaufman | bb3f848 | 2014-07-17 17:14:31 +0300 | [diff] [blame] | 839 | /* |
| 840 | * The teardown message in ieee80211_tdls_mgmt_teardown() was |
| 841 | * created while the queues were stopped, so it might still be |
| 842 | * pending. Before flushing the queues we need to be sure the |
| 843 | * message is handled by the tasklet handling pending messages, |
| 844 | * otherwise we might start destroying the station before |
| 845 | * sending the teardown packet. |
| 846 | * Note that this only forces the tasklet to flush pendings - |
| 847 | * not to stop the tasklet from rescheduling itself. |
| 848 | */ |
| 849 | tasklet_kill(&local->tx_pending_tasklet); |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 850 | /* flush a potentially queued teardown packet */ |
| 851 | ieee80211_flush_queues(local, sdata); |
| 852 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 853 | ret = sta_info_destroy_addr(sdata, peer); |
| 854 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 855 | default: |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 856 | ret = -ENOTSUPP; |
| 857 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 858 | } |
| 859 | |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 860 | if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
| 861 | cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work); |
| 862 | eth_zero_addr(sdata->u.mgd.tdls_peer); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 863 | } |
| 864 | |
| 865 | mutex_unlock(&local->mtx); |
| 866 | return ret; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 867 | } |
Arik Nemtsov | c887f0d3 | 2014-06-11 17:18:25 +0300 | [diff] [blame] | 868 | |
| 869 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, |
| 870 | enum nl80211_tdls_operation oper, |
| 871 | u16 reason_code, gfp_t gfp) |
| 872 | { |
| 873 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 874 | |
| 875 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { |
| 876 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", |
| 877 | oper); |
| 878 | return; |
| 879 | } |
| 880 | |
| 881 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); |
| 882 | } |
| 883 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); |