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 |
| 6 | * |
| 7 | * This file is GPLv2 as found in COPYING. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/ieee80211.h> |
Arik Nemtsov | c887f0d3 | 2014-06-11 17:18:25 +0300 | [diff] [blame] | 11 | #include <net/cfg80211.h> |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 12 | #include "ieee80211_i.h" |
Arik Nemtsov | ee10f2c | 2014-06-11 17:18:27 +0300 | [diff] [blame] | 13 | #include "driver-ops.h" |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 14 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 15 | /* give usermode some time for retries in setting up the TDLS session */ |
| 16 | #define TDLS_PEER_SETUP_TIMEOUT (15 * HZ) |
| 17 | |
| 18 | void ieee80211_tdls_peer_del_work(struct work_struct *wk) |
| 19 | { |
| 20 | struct ieee80211_sub_if_data *sdata; |
| 21 | struct ieee80211_local *local; |
| 22 | |
| 23 | sdata = container_of(wk, struct ieee80211_sub_if_data, |
| 24 | tdls_peer_del_work.work); |
| 25 | local = sdata->local; |
| 26 | |
| 27 | mutex_lock(&local->mtx); |
| 28 | if (!is_zero_ether_addr(sdata->tdls_peer)) { |
| 29 | tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->tdls_peer); |
| 30 | sta_info_destroy_addr(sdata, sdata->tdls_peer); |
| 31 | eth_zero_addr(sdata->tdls_peer); |
| 32 | } |
| 33 | mutex_unlock(&local->mtx); |
| 34 | } |
| 35 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 36 | static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb) |
| 37 | { |
| 38 | u8 *pos = (void *)skb_put(skb, 7); |
| 39 | |
| 40 | *pos++ = WLAN_EID_EXT_CAPABILITY; |
| 41 | *pos++ = 5; /* len */ |
| 42 | *pos++ = 0x0; |
| 43 | *pos++ = 0x0; |
| 44 | *pos++ = 0x0; |
| 45 | *pos++ = 0x0; |
| 46 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; |
| 47 | } |
| 48 | |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame^] | 49 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
| 50 | u16 status_code) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 51 | { |
| 52 | struct ieee80211_local *local = sdata->local; |
| 53 | u16 capab; |
| 54 | |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame^] | 55 | /* The capability will be 0 when sending a failure code */ |
| 56 | if (status_code != 0) |
| 57 | return 0; |
| 58 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 59 | capab = 0; |
| 60 | if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ) |
| 61 | return capab; |
| 62 | |
| 63 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) |
| 64 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
| 65 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) |
| 66 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
| 67 | |
| 68 | return capab; |
| 69 | } |
| 70 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 71 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
| 72 | struct sk_buff *skb, const u8 *peer, |
| 73 | bool initiator) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 74 | { |
| 75 | struct ieee80211_tdls_lnkie *lnkid; |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 76 | const u8 *init_addr, *rsp_addr; |
| 77 | |
| 78 | if (initiator) { |
| 79 | init_addr = sdata->vif.addr; |
| 80 | rsp_addr = peer; |
| 81 | } else { |
| 82 | init_addr = peer; |
| 83 | rsp_addr = sdata->vif.addr; |
| 84 | } |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 85 | |
| 86 | lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); |
| 87 | |
| 88 | lnkid->ie_type = WLAN_EID_LINK_ID; |
| 89 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; |
| 90 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 91 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
| 92 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); |
| 93 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 94 | } |
| 95 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 96 | static void |
| 97 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, |
| 98 | struct sk_buff *skb, const u8 *peer, |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 99 | u8 action_code, bool initiator, |
| 100 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 101 | { |
| 102 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
| 103 | size_t offset = 0, noffset; |
| 104 | u8 *pos; |
| 105 | |
| 106 | ieee80211_add_srates_ie(sdata, skb, false, band); |
| 107 | ieee80211_add_ext_srates_ie(sdata, skb, false, band); |
| 108 | |
| 109 | /* add any custom IEs that go before Extended Capabilities */ |
| 110 | if (extra_ies_len) { |
| 111 | static const u8 before_ext_cap[] = { |
| 112 | WLAN_EID_SUPP_RATES, |
| 113 | WLAN_EID_COUNTRY, |
| 114 | WLAN_EID_EXT_SUPP_RATES, |
| 115 | WLAN_EID_SUPPORTED_CHANNELS, |
| 116 | WLAN_EID_RSN, |
| 117 | }; |
| 118 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 119 | before_ext_cap, |
| 120 | ARRAY_SIZE(before_ext_cap), |
| 121 | offset); |
| 122 | pos = skb_put(skb, noffset - offset); |
| 123 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 124 | offset = noffset; |
| 125 | } |
| 126 | |
| 127 | ieee80211_tdls_add_ext_capab(skb); |
| 128 | |
| 129 | /* add any custom IEs that go before HT capabilities */ |
| 130 | if (extra_ies_len) { |
| 131 | static const u8 before_ht_cap[] = { |
| 132 | WLAN_EID_SUPP_RATES, |
| 133 | WLAN_EID_COUNTRY, |
| 134 | WLAN_EID_EXT_SUPP_RATES, |
| 135 | WLAN_EID_SUPPORTED_CHANNELS, |
| 136 | WLAN_EID_RSN, |
| 137 | WLAN_EID_EXT_CAPABILITY, |
| 138 | WLAN_EID_QOS_CAPA, |
| 139 | WLAN_EID_FAST_BSS_TRANSITION, |
| 140 | WLAN_EID_TIMEOUT_INTERVAL, |
| 141 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| 142 | }; |
| 143 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 144 | before_ht_cap, |
| 145 | ARRAY_SIZE(before_ht_cap), |
| 146 | offset); |
| 147 | pos = skb_put(skb, noffset - offset); |
| 148 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 149 | offset = noffset; |
| 150 | } |
| 151 | |
| 152 | /* add any remaining IEs */ |
| 153 | if (extra_ies_len) { |
| 154 | noffset = extra_ies_len; |
| 155 | pos = skb_put(skb, noffset - offset); |
| 156 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 157 | } |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 158 | |
| 159 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 160 | } |
| 161 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 162 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
| 163 | struct sk_buff *skb, const u8 *peer, |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 164 | u8 action_code, u16 status_code, |
| 165 | bool initiator, const u8 *extra_ies, |
| 166 | size_t extra_ies_len) |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 167 | { |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 168 | switch (action_code) { |
| 169 | case WLAN_TDLS_SETUP_REQUEST: |
| 170 | case WLAN_TDLS_SETUP_RESPONSE: |
| 171 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 172 | if (status_code == 0) |
| 173 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, |
| 174 | action_code, |
| 175 | initiator, |
| 176 | extra_ies, |
| 177 | extra_ies_len); |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 178 | break; |
| 179 | case WLAN_TDLS_SETUP_CONFIRM: |
| 180 | case WLAN_TDLS_TEARDOWN: |
| 181 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 182 | if (extra_ies_len) |
| 183 | memcpy(skb_put(skb, extra_ies_len), extra_ies, |
| 184 | extra_ies_len); |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 185 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
| 186 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 187 | break; |
| 188 | } |
| 189 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 190 | } |
| 191 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 192 | static int |
| 193 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 194 | const u8 *peer, u8 action_code, u8 dialog_token, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 195 | u16 status_code, struct sk_buff *skb) |
| 196 | { |
| 197 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 198 | struct ieee80211_tdls_data *tf; |
| 199 | |
| 200 | tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); |
| 201 | |
| 202 | memcpy(tf->da, peer, ETH_ALEN); |
| 203 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); |
| 204 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); |
| 205 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; |
| 206 | |
| 207 | switch (action_code) { |
| 208 | case WLAN_TDLS_SETUP_REQUEST: |
| 209 | tf->category = WLAN_CATEGORY_TDLS; |
| 210 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; |
| 211 | |
| 212 | skb_put(skb, sizeof(tf->u.setup_req)); |
| 213 | tf->u.setup_req.dialog_token = dialog_token; |
| 214 | tf->u.setup_req.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame^] | 215 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 216 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 217 | break; |
| 218 | case WLAN_TDLS_SETUP_RESPONSE: |
| 219 | tf->category = WLAN_CATEGORY_TDLS; |
| 220 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; |
| 221 | |
| 222 | skb_put(skb, sizeof(tf->u.setup_resp)); |
| 223 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); |
| 224 | tf->u.setup_resp.dialog_token = dialog_token; |
| 225 | tf->u.setup_resp.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame^] | 226 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 227 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 228 | break; |
| 229 | case WLAN_TDLS_SETUP_CONFIRM: |
| 230 | tf->category = WLAN_CATEGORY_TDLS; |
| 231 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; |
| 232 | |
| 233 | skb_put(skb, sizeof(tf->u.setup_cfm)); |
| 234 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); |
| 235 | tf->u.setup_cfm.dialog_token = dialog_token; |
| 236 | break; |
| 237 | case WLAN_TDLS_TEARDOWN: |
| 238 | tf->category = WLAN_CATEGORY_TDLS; |
| 239 | tf->action_code = WLAN_TDLS_TEARDOWN; |
| 240 | |
| 241 | skb_put(skb, sizeof(tf->u.teardown)); |
| 242 | tf->u.teardown.reason_code = cpu_to_le16(status_code); |
| 243 | break; |
| 244 | case WLAN_TDLS_DISCOVERY_REQUEST: |
| 245 | tf->category = WLAN_CATEGORY_TDLS; |
| 246 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; |
| 247 | |
| 248 | skb_put(skb, sizeof(tf->u.discover_req)); |
| 249 | tf->u.discover_req.dialog_token = dialog_token; |
| 250 | break; |
| 251 | default: |
| 252 | return -EINVAL; |
| 253 | } |
| 254 | |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static int |
| 259 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 260 | const u8 *peer, u8 action_code, u8 dialog_token, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 261 | u16 status_code, struct sk_buff *skb) |
| 262 | { |
| 263 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 264 | struct ieee80211_mgmt *mgmt; |
| 265 | |
| 266 | mgmt = (void *)skb_put(skb, 24); |
| 267 | memset(mgmt, 0, 24); |
| 268 | memcpy(mgmt->da, peer, ETH_ALEN); |
| 269 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 270 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
| 271 | |
| 272 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 273 | IEEE80211_STYPE_ACTION); |
| 274 | |
| 275 | switch (action_code) { |
| 276 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 277 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); |
| 278 | mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; |
| 279 | mgmt->u.action.u.tdls_discover_resp.action_code = |
| 280 | WLAN_PUB_ACTION_TDLS_DISCOVER_RES; |
| 281 | mgmt->u.action.u.tdls_discover_resp.dialog_token = |
| 282 | dialog_token; |
| 283 | mgmt->u.action.u.tdls_discover_resp.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame^] | 284 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 285 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 286 | break; |
| 287 | default: |
| 288 | return -EINVAL; |
| 289 | } |
| 290 | |
| 291 | return 0; |
| 292 | } |
| 293 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 294 | static int |
| 295 | ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev, |
| 296 | const u8 *peer, u8 action_code, |
| 297 | u8 dialog_token, u16 status_code, |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 298 | u32 peer_capability, bool initiator, |
| 299 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 300 | { |
| 301 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 302 | struct ieee80211_local *local = sdata->local; |
| 303 | struct sk_buff *skb = NULL; |
| 304 | bool send_direct; |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 305 | struct sta_info *sta; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 306 | int ret; |
| 307 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 308 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + |
| 309 | max(sizeof(struct ieee80211_mgmt), |
| 310 | sizeof(struct ieee80211_tdls_data)) + |
| 311 | 50 + /* supported rates */ |
| 312 | 7 + /* ext capab */ |
| 313 | extra_ies_len + |
| 314 | sizeof(struct ieee80211_tdls_lnkie)); |
| 315 | if (!skb) |
| 316 | return -ENOMEM; |
| 317 | |
| 318 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 319 | |
| 320 | switch (action_code) { |
| 321 | case WLAN_TDLS_SETUP_REQUEST: |
| 322 | case WLAN_TDLS_SETUP_RESPONSE: |
| 323 | case WLAN_TDLS_SETUP_CONFIRM: |
| 324 | case WLAN_TDLS_TEARDOWN: |
| 325 | case WLAN_TDLS_DISCOVERY_REQUEST: |
| 326 | ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer, |
| 327 | action_code, dialog_token, |
| 328 | status_code, skb); |
| 329 | send_direct = false; |
| 330 | break; |
| 331 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 332 | ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code, |
| 333 | dialog_token, status_code, |
| 334 | skb); |
| 335 | send_direct = true; |
| 336 | break; |
| 337 | default: |
| 338 | ret = -ENOTSUPP; |
| 339 | break; |
| 340 | } |
| 341 | |
| 342 | if (ret < 0) |
| 343 | goto fail; |
| 344 | |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 345 | rcu_read_lock(); |
| 346 | sta = sta_info_get(sdata, peer); |
| 347 | |
| 348 | /* infer the initiator if we can, to support old userspace */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 349 | switch (action_code) { |
| 350 | case WLAN_TDLS_SETUP_REQUEST: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 351 | if (sta) |
| 352 | set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
| 353 | /* fall-through */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 354 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 355 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 356 | initiator = true; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 357 | break; |
| 358 | case WLAN_TDLS_SETUP_RESPONSE: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 359 | /* |
| 360 | * In some testing scenarios, we send a request and response. |
| 361 | * Make the last packet sent take effect for the initiator |
| 362 | * value. |
| 363 | */ |
| 364 | if (sta) |
| 365 | clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
| 366 | /* fall-through */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 367 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 368 | initiator = false; |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 369 | break; |
| 370 | case WLAN_TDLS_TEARDOWN: |
| 371 | /* any value is ok */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 372 | break; |
| 373 | default: |
| 374 | ret = -ENOTSUPP; |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 375 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 376 | } |
| 377 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 378 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR)) |
| 379 | initiator = true; |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 380 | |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 381 | rcu_read_unlock(); |
| 382 | if (ret < 0) |
| 383 | goto fail; |
| 384 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 385 | ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code, |
| 386 | initiator, extra_ies, extra_ies_len); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 387 | if (send_direct) { |
| 388 | ieee80211_tx_skb(sdata, skb); |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | /* |
| 393 | * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise |
| 394 | * we should default to AC_VI. |
| 395 | */ |
| 396 | switch (action_code) { |
| 397 | case WLAN_TDLS_SETUP_REQUEST: |
| 398 | case WLAN_TDLS_SETUP_RESPONSE: |
| 399 | skb_set_queue_mapping(skb, IEEE80211_AC_BK); |
| 400 | skb->priority = 2; |
| 401 | break; |
| 402 | default: |
| 403 | skb_set_queue_mapping(skb, IEEE80211_AC_VI); |
| 404 | skb->priority = 5; |
| 405 | break; |
| 406 | } |
| 407 | |
| 408 | /* disable bottom halves when entering the Tx path */ |
| 409 | local_bh_disable(); |
| 410 | ret = ieee80211_subif_start_xmit(skb, dev); |
| 411 | local_bh_enable(); |
| 412 | |
| 413 | return ret; |
| 414 | |
| 415 | fail: |
| 416 | dev_kfree_skb(skb); |
| 417 | return ret; |
| 418 | } |
| 419 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 420 | static int |
| 421 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, |
| 422 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 423 | u16 status_code, u32 peer_capability, bool initiator, |
| 424 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 425 | { |
| 426 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 427 | struct ieee80211_local *local = sdata->local; |
| 428 | int ret; |
| 429 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 430 | mutex_lock(&local->mtx); |
| 431 | |
| 432 | /* we don't support concurrent TDLS peer setups */ |
| 433 | if (!is_zero_ether_addr(sdata->tdls_peer) && |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 434 | !ether_addr_equal(sdata->tdls_peer, peer)) { |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 435 | ret = -EBUSY; |
| 436 | goto exit; |
| 437 | } |
| 438 | |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 439 | /* |
| 440 | * make sure we have a STA representing the peer so we drop or buffer |
| 441 | * 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] | 442 | * during setup through the AP path. |
| 443 | * Allow error packets to be sent - sometimes we don't even add a STA |
| 444 | * before failing the setup. |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 445 | */ |
Arik Nemtsov | 6ae32e5 | 2014-07-17 17:14:18 +0300 | [diff] [blame] | 446 | if (status_code == 0) { |
| 447 | rcu_read_lock(); |
| 448 | if (!sta_info_get(sdata, peer)) { |
| 449 | rcu_read_unlock(); |
| 450 | ret = -ENOLINK; |
| 451 | goto exit; |
| 452 | } |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 453 | rcu_read_unlock(); |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 454 | } |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 455 | |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 456 | ieee80211_flush_queues(local, sdata); |
| 457 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 458 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
| 459 | dialog_token, status_code, |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 460 | peer_capability, initiator, |
| 461 | extra_ies, extra_ies_len); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 462 | if (ret < 0) |
| 463 | goto exit; |
| 464 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 465 | memcpy(sdata->tdls_peer, peer, ETH_ALEN); |
| 466 | ieee80211_queue_delayed_work(&sdata->local->hw, |
| 467 | &sdata->tdls_peer_del_work, |
| 468 | TDLS_PEER_SETUP_TIMEOUT); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 469 | |
| 470 | exit: |
| 471 | mutex_unlock(&local->mtx); |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 472 | return ret; |
| 473 | } |
| 474 | |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 475 | static int |
| 476 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, |
| 477 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 478 | u16 status_code, u32 peer_capability, |
| 479 | bool initiator, const u8 *extra_ies, |
| 480 | size_t extra_ies_len) |
| 481 | { |
| 482 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 483 | struct ieee80211_local *local = sdata->local; |
| 484 | struct sta_info *sta; |
| 485 | int ret; |
| 486 | |
| 487 | /* |
| 488 | * No packets can be transmitted to the peer via the AP during setup - |
| 489 | * the STA is set as a TDLS peer, but is not authorized. |
| 490 | * During teardown, we prevent direct transmissions by stopping the |
| 491 | * queues and flushing all direct packets. |
| 492 | */ |
| 493 | ieee80211_stop_vif_queues(local, sdata, |
| 494 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); |
| 495 | ieee80211_flush_queues(local, sdata); |
| 496 | |
| 497 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
| 498 | dialog_token, status_code, |
| 499 | peer_capability, initiator, |
| 500 | extra_ies, extra_ies_len); |
| 501 | if (ret < 0) |
| 502 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", |
| 503 | ret); |
| 504 | |
| 505 | /* |
| 506 | * Remove the STA AUTH flag to force further traffic through the AP. If |
| 507 | * the STA was unreachable, it was already removed. |
| 508 | */ |
| 509 | rcu_read_lock(); |
| 510 | sta = sta_info_get(sdata, peer); |
| 511 | if (sta) |
| 512 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
| 513 | rcu_read_unlock(); |
| 514 | |
| 515 | ieee80211_wake_vif_queues(local, sdata, |
| 516 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 521 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
| 522 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 523 | u16 status_code, u32 peer_capability, |
| 524 | bool initiator, const u8 *extra_ies, |
| 525 | size_t extra_ies_len) |
| 526 | { |
| 527 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 528 | int ret; |
| 529 | |
| 530 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) |
| 531 | return -ENOTSUPP; |
| 532 | |
| 533 | /* make sure we are in managed mode, and associated */ |
| 534 | if (sdata->vif.type != NL80211_IFTYPE_STATION || |
| 535 | !sdata->u.mgd.associated) |
| 536 | return -EINVAL; |
| 537 | |
| 538 | switch (action_code) { |
| 539 | case WLAN_TDLS_SETUP_REQUEST: |
| 540 | case WLAN_TDLS_SETUP_RESPONSE: |
| 541 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, |
| 542 | dialog_token, status_code, |
| 543 | peer_capability, initiator, |
| 544 | extra_ies, extra_ies_len); |
| 545 | break; |
| 546 | case WLAN_TDLS_TEARDOWN: |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 547 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
| 548 | action_code, dialog_token, |
| 549 | status_code, |
| 550 | peer_capability, initiator, |
| 551 | extra_ies, extra_ies_len); |
| 552 | break; |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 553 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | ee10f2c | 2014-06-11 17:18:27 +0300 | [diff] [blame] | 554 | /* |
| 555 | * Protect the discovery so we can hear the TDLS discovery |
| 556 | * response frame. It is transmitted directly and not buffered |
| 557 | * by the AP. |
| 558 | */ |
| 559 | drv_mgd_protect_tdls_discover(sdata->local, sdata); |
| 560 | /* fall-through */ |
| 561 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 562 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 563 | /* no special handling */ |
| 564 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, |
| 565 | action_code, |
| 566 | dialog_token, |
| 567 | status_code, |
| 568 | peer_capability, |
| 569 | initiator, extra_ies, |
| 570 | extra_ies_len); |
| 571 | break; |
| 572 | default: |
| 573 | ret = -EOPNOTSUPP; |
| 574 | break; |
| 575 | } |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 576 | |
| 577 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", |
| 578 | action_code, peer, ret); |
| 579 | return ret; |
| 580 | } |
| 581 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 582 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 583 | const u8 *peer, enum nl80211_tdls_operation oper) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 584 | { |
| 585 | struct sta_info *sta; |
| 586 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 587 | struct ieee80211_local *local = sdata->local; |
| 588 | int ret; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 589 | |
| 590 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) |
| 591 | return -ENOTSUPP; |
| 592 | |
| 593 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 594 | return -EINVAL; |
| 595 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 596 | switch (oper) { |
| 597 | case NL80211_TDLS_ENABLE_LINK: |
| 598 | case NL80211_TDLS_DISABLE_LINK: |
| 599 | break; |
| 600 | case NL80211_TDLS_TEARDOWN: |
| 601 | case NL80211_TDLS_SETUP: |
| 602 | case NL80211_TDLS_DISCOVERY_REQ: |
| 603 | /* We don't support in-driver setup/teardown/discovery */ |
| 604 | return -ENOTSUPP; |
| 605 | } |
| 606 | |
| 607 | mutex_lock(&local->mtx); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 608 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
| 609 | |
| 610 | switch (oper) { |
| 611 | case NL80211_TDLS_ENABLE_LINK: |
| 612 | rcu_read_lock(); |
| 613 | sta = sta_info_get(sdata, peer); |
| 614 | if (!sta) { |
| 615 | rcu_read_unlock(); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 616 | ret = -ENOLINK; |
| 617 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
| 621 | rcu_read_unlock(); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 622 | |
| 623 | WARN_ON_ONCE(is_zero_ether_addr(sdata->tdls_peer) || |
| 624 | !ether_addr_equal(sdata->tdls_peer, peer)); |
| 625 | ret = 0; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 626 | break; |
| 627 | case NL80211_TDLS_DISABLE_LINK: |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 628 | /* flush a potentially queued teardown packet */ |
| 629 | ieee80211_flush_queues(local, sdata); |
| 630 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 631 | ret = sta_info_destroy_addr(sdata, peer); |
| 632 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 633 | default: |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 634 | ret = -ENOTSUPP; |
| 635 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 636 | } |
| 637 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 638 | if (ret == 0 && ether_addr_equal(sdata->tdls_peer, peer)) { |
| 639 | cancel_delayed_work(&sdata->tdls_peer_del_work); |
| 640 | eth_zero_addr(sdata->tdls_peer); |
| 641 | } |
| 642 | |
| 643 | mutex_unlock(&local->mtx); |
| 644 | return ret; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 645 | } |
Arik Nemtsov | c887f0d3 | 2014-06-11 17:18:25 +0300 | [diff] [blame] | 646 | |
| 647 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, |
| 648 | enum nl80211_tdls_operation oper, |
| 649 | u16 reason_code, gfp_t gfp) |
| 650 | { |
| 651 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 652 | |
| 653 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { |
| 654 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", |
| 655 | oper); |
| 656 | return; |
| 657 | } |
| 658 | |
| 659 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); |
| 660 | } |
| 661 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); |