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 | 78632a1 | 2014-11-09 18:50:14 +0200 | [diff] [blame] | 38 | static void ieee80211_tdls_add_ext_capab(struct ieee80211_local *local, |
| 39 | struct sk_buff *skb) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 40 | { |
| 41 | u8 *pos = (void *)skb_put(skb, 7); |
Arik Nemtsov | 78632a1 | 2014-11-09 18:50:14 +0200 | [diff] [blame] | 42 | bool chan_switch = local->hw.wiphy->features & |
| 43 | NL80211_FEATURE_TDLS_CHANNEL_SWITCH; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 44 | |
| 45 | *pos++ = WLAN_EID_EXT_CAPABILITY; |
| 46 | *pos++ = 5; /* len */ |
| 47 | *pos++ = 0x0; |
| 48 | *pos++ = 0x0; |
| 49 | *pos++ = 0x0; |
Arik Nemtsov | 78632a1 | 2014-11-09 18:50:14 +0200 | [diff] [blame] | 50 | *pos++ = chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 51 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; |
| 52 | } |
| 53 | |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 54 | static u8 |
| 55 | ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata, |
| 56 | struct sk_buff *skb, u16 start, u16 end, |
| 57 | u16 spacing) |
| 58 | { |
| 59 | u8 subband_cnt = 0, ch_cnt = 0; |
| 60 | struct ieee80211_channel *ch; |
| 61 | struct cfg80211_chan_def chandef; |
| 62 | int i, subband_start; |
| 63 | |
| 64 | for (i = start; i <= end; i += spacing) { |
| 65 | if (!ch_cnt) |
| 66 | subband_start = i; |
| 67 | |
| 68 | ch = ieee80211_get_channel(sdata->local->hw.wiphy, i); |
| 69 | if (ch) { |
| 70 | /* we will be active on the channel */ |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 71 | cfg80211_chandef_create(&chandef, ch, |
Arik Nemtsov | 5007589 | 2015-01-07 16:45:07 +0200 | [diff] [blame] | 72 | NL80211_CHAN_NO_HT); |
| 73 | if (cfg80211_reg_can_beacon(sdata->local->hw.wiphy, |
| 74 | &chandef, |
| 75 | sdata->wdev.iftype)) { |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 76 | ch_cnt++; |
Arik Nemtsov | 5007589 | 2015-01-07 16:45:07 +0200 | [diff] [blame] | 77 | /* |
| 78 | * check if the next channel is also part of |
| 79 | * this allowed range |
| 80 | */ |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 81 | continue; |
| 82 | } |
| 83 | } |
| 84 | |
Arik Nemtsov | 5007589 | 2015-01-07 16:45:07 +0200 | [diff] [blame] | 85 | /* |
| 86 | * we've reached the end of a range, with allowed channels |
| 87 | * found |
| 88 | */ |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 89 | if (ch_cnt) { |
| 90 | u8 *pos = skb_put(skb, 2); |
| 91 | *pos++ = ieee80211_frequency_to_channel(subband_start); |
| 92 | *pos++ = ch_cnt; |
| 93 | |
| 94 | subband_cnt++; |
| 95 | ch_cnt = 0; |
| 96 | } |
| 97 | } |
| 98 | |
Arik Nemtsov | 5007589 | 2015-01-07 16:45:07 +0200 | [diff] [blame] | 99 | /* all channels in the requested range are allowed - add them here */ |
| 100 | if (ch_cnt) { |
| 101 | u8 *pos = skb_put(skb, 2); |
| 102 | *pos++ = ieee80211_frequency_to_channel(subband_start); |
| 103 | *pos++ = ch_cnt; |
| 104 | |
| 105 | subband_cnt++; |
| 106 | } |
| 107 | |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 108 | return subband_cnt; |
| 109 | } |
| 110 | |
| 111 | static void |
| 112 | ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata, |
| 113 | struct sk_buff *skb) |
| 114 | { |
| 115 | /* |
| 116 | * Add possible channels for TDLS. These are channels that are allowed |
| 117 | * to be active. |
| 118 | */ |
| 119 | u8 subband_cnt; |
| 120 | u8 *pos = skb_put(skb, 2); |
| 121 | |
| 122 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; |
| 123 | |
| 124 | /* |
| 125 | * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as |
| 126 | * this doesn't happen in real world scenarios. |
| 127 | */ |
| 128 | |
| 129 | /* 2GHz, with 5MHz spacing */ |
| 130 | subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5); |
| 131 | |
| 132 | /* 5GHz, with 20MHz spacing */ |
| 133 | subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20); |
| 134 | |
| 135 | /* length */ |
| 136 | *pos = 2 * subband_cnt; |
| 137 | } |
| 138 | |
Arik Nemtsov | a38700d | 2015-03-18 08:46:08 +0200 | [diff] [blame] | 139 | static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata, |
| 140 | struct sk_buff *skb) |
| 141 | { |
| 142 | u8 *pos; |
| 143 | u8 op_class; |
| 144 | |
| 145 | if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef, |
| 146 | &op_class)) |
| 147 | return; |
| 148 | |
| 149 | pos = skb_put(skb, 4); |
| 150 | *pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES; |
| 151 | *pos++ = 2; /* len */ |
| 152 | |
| 153 | *pos++ = op_class; |
| 154 | *pos++ = op_class; /* give current operating class as alternate too */ |
| 155 | } |
| 156 | |
Arik Nemtsov | 2cedd87 | 2014-11-09 18:50:13 +0200 | [diff] [blame] | 157 | static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb) |
| 158 | { |
| 159 | u8 *pos = (void *)skb_put(skb, 3); |
| 160 | |
| 161 | *pos++ = WLAN_EID_BSS_COEX_2040; |
| 162 | *pos++ = 1; /* len */ |
| 163 | |
| 164 | *pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST; |
| 165 | } |
| 166 | |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 167 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
| 168 | u16 status_code) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 169 | { |
| 170 | struct ieee80211_local *local = sdata->local; |
| 171 | u16 capab; |
| 172 | |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 173 | /* The capability will be 0 when sending a failure code */ |
| 174 | if (status_code != 0) |
| 175 | return 0; |
| 176 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 177 | capab = 0; |
| 178 | if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ) |
| 179 | return capab; |
| 180 | |
| 181 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) |
| 182 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; |
| 183 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) |
| 184 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; |
| 185 | |
| 186 | return capab; |
| 187 | } |
| 188 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 189 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
| 190 | struct sk_buff *skb, const u8 *peer, |
| 191 | bool initiator) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 192 | { |
| 193 | struct ieee80211_tdls_lnkie *lnkid; |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 194 | const u8 *init_addr, *rsp_addr; |
| 195 | |
| 196 | if (initiator) { |
| 197 | init_addr = sdata->vif.addr; |
| 198 | rsp_addr = peer; |
| 199 | } else { |
| 200 | init_addr = peer; |
| 201 | rsp_addr = sdata->vif.addr; |
| 202 | } |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 203 | |
| 204 | lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); |
| 205 | |
| 206 | lnkid->ie_type = WLAN_EID_LINK_ID; |
| 207 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; |
| 208 | |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 209 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
| 210 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); |
| 211 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 212 | } |
| 213 | |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 214 | static void |
| 215 | ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
| 216 | { |
| 217 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
| 218 | u8 *pos = (void *)skb_put(skb, 4); |
| 219 | |
| 220 | *pos++ = WLAN_EID_AID; |
| 221 | *pos++ = 2; /* len */ |
| 222 | put_unaligned_le16(ifmgd->aid, pos); |
| 223 | } |
| 224 | |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 225 | /* translate numbering in the WMM parameter IE to the mac80211 notation */ |
| 226 | static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac) |
| 227 | { |
| 228 | switch (ac) { |
| 229 | default: |
| 230 | WARN_ON_ONCE(1); |
| 231 | case 0: |
| 232 | return IEEE80211_AC_BE; |
| 233 | case 1: |
| 234 | return IEEE80211_AC_BK; |
| 235 | case 2: |
| 236 | return IEEE80211_AC_VI; |
| 237 | case 3: |
| 238 | return IEEE80211_AC_VO; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci) |
| 243 | { |
| 244 | u8 ret; |
| 245 | |
| 246 | ret = aifsn & 0x0f; |
| 247 | if (acm) |
| 248 | ret |= 0x10; |
| 249 | ret |= (aci << 5) & 0x60; |
| 250 | return ret; |
| 251 | } |
| 252 | |
| 253 | static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max) |
| 254 | { |
| 255 | return ((ilog2(cw_min + 1) << 0x0) & 0x0f) | |
| 256 | ((ilog2(cw_max + 1) << 0x4) & 0xf0); |
| 257 | } |
| 258 | |
| 259 | static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata, |
| 260 | struct sk_buff *skb) |
| 261 | { |
| 262 | struct ieee80211_wmm_param_ie *wmm; |
| 263 | struct ieee80211_tx_queue_params *txq; |
| 264 | int i; |
| 265 | |
| 266 | wmm = (void *)skb_put(skb, sizeof(*wmm)); |
| 267 | memset(wmm, 0, sizeof(*wmm)); |
| 268 | |
| 269 | wmm->element_id = WLAN_EID_VENDOR_SPECIFIC; |
| 270 | wmm->len = sizeof(*wmm) - 2; |
| 271 | |
| 272 | wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */ |
| 273 | wmm->oui[1] = 0x50; |
| 274 | wmm->oui[2] = 0xf2; |
| 275 | wmm->oui_type = 2; /* WME */ |
| 276 | wmm->oui_subtype = 1; /* WME param */ |
| 277 | wmm->version = 1; /* WME ver */ |
| 278 | wmm->qos_info = 0; /* U-APSD not in use */ |
| 279 | |
| 280 | /* |
| 281 | * Use the EDCA parameters defined for the BSS, or default if the AP |
| 282 | * doesn't support it, as mandated by 802.11-2012 section 10.22.4 |
| 283 | */ |
| 284 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
| 285 | txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)]; |
| 286 | wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs, |
| 287 | txq->acm, i); |
| 288 | wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max); |
| 289 | wmm->ac[i].txop_limit = cpu_to_le16(txq->txop); |
| 290 | } |
| 291 | } |
| 292 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 293 | static void |
| 294 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, |
| 295 | struct sk_buff *skb, const u8 *peer, |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 296 | u8 action_code, bool initiator, |
| 297 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 298 | { |
| 299 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
Arik Nemtsov | 40b861a | 2014-07-17 17:14:23 +0300 | [diff] [blame] | 300 | struct ieee80211_local *local = sdata->local; |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 301 | struct ieee80211_supported_band *sband; |
| 302 | struct ieee80211_sta_ht_cap ht_cap; |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 303 | struct ieee80211_sta_vht_cap vht_cap; |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 304 | struct sta_info *sta = NULL; |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 305 | size_t offset = 0, noffset; |
| 306 | u8 *pos; |
| 307 | |
| 308 | ieee80211_add_srates_ie(sdata, skb, false, band); |
| 309 | ieee80211_add_ext_srates_ie(sdata, skb, false, band); |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 310 | ieee80211_tdls_add_supp_channels(sdata, skb); |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 311 | |
| 312 | /* add any custom IEs that go before Extended Capabilities */ |
| 313 | if (extra_ies_len) { |
| 314 | static const u8 before_ext_cap[] = { |
| 315 | WLAN_EID_SUPP_RATES, |
| 316 | WLAN_EID_COUNTRY, |
| 317 | WLAN_EID_EXT_SUPP_RATES, |
| 318 | WLAN_EID_SUPPORTED_CHANNELS, |
| 319 | WLAN_EID_RSN, |
| 320 | }; |
| 321 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 322 | before_ext_cap, |
| 323 | ARRAY_SIZE(before_ext_cap), |
| 324 | offset); |
| 325 | pos = skb_put(skb, noffset - offset); |
| 326 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 327 | offset = noffset; |
| 328 | } |
| 329 | |
Arik Nemtsov | 78632a1 | 2014-11-09 18:50:14 +0200 | [diff] [blame] | 330 | ieee80211_tdls_add_ext_capab(local, skb); |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 331 | |
Arik Nemtsov | 40b861a | 2014-07-17 17:14:23 +0300 | [diff] [blame] | 332 | /* add the QoS element if we support it */ |
| 333 | if (local->hw.queues >= IEEE80211_NUM_ACS && |
| 334 | action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES) |
| 335 | ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */ |
| 336 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 337 | /* add any custom IEs that go before HT capabilities */ |
| 338 | if (extra_ies_len) { |
| 339 | static const u8 before_ht_cap[] = { |
| 340 | WLAN_EID_SUPP_RATES, |
| 341 | WLAN_EID_COUNTRY, |
| 342 | WLAN_EID_EXT_SUPP_RATES, |
| 343 | WLAN_EID_SUPPORTED_CHANNELS, |
| 344 | WLAN_EID_RSN, |
| 345 | WLAN_EID_EXT_CAPABILITY, |
| 346 | WLAN_EID_QOS_CAPA, |
| 347 | WLAN_EID_FAST_BSS_TRANSITION, |
| 348 | WLAN_EID_TIMEOUT_INTERVAL, |
| 349 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| 350 | }; |
| 351 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 352 | before_ht_cap, |
| 353 | ARRAY_SIZE(before_ht_cap), |
| 354 | offset); |
| 355 | pos = skb_put(skb, noffset - offset); |
| 356 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 357 | offset = noffset; |
| 358 | } |
| 359 | |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 360 | rcu_read_lock(); |
| 361 | |
| 362 | /* we should have the peer STA if we're already responding */ |
| 363 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { |
| 364 | sta = sta_info_get(sdata, peer); |
| 365 | if (WARN_ON_ONCE(!sta)) { |
| 366 | rcu_read_unlock(); |
| 367 | return; |
| 368 | } |
| 369 | } |
| 370 | |
Arik Nemtsov | a38700d | 2015-03-18 08:46:08 +0200 | [diff] [blame] | 371 | ieee80211_tdls_add_oper_classes(sdata, skb); |
| 372 | |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 373 | /* |
| 374 | * with TDLS we can switch channels, and HT-caps are not necessarily |
| 375 | * the same on all bands. The specification limits the setup to a |
| 376 | * single HT-cap, so use the current band for now. |
| 377 | */ |
| 378 | sband = local->hw.wiphy->bands[band]; |
| 379 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 380 | |
Arik Nemtsov | 070e176 | 2015-03-30 11:16:23 +0300 | [diff] [blame] | 381 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
| 382 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && |
| 383 | ht_cap.ht_supported) { |
Johannes Berg | c5309ba | 2015-01-23 11:42:14 +0100 | [diff] [blame] | 384 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 385 | |
Johannes Berg | c5309ba | 2015-01-23 11:42:14 +0100 | [diff] [blame] | 386 | /* disable SMPS in TDLS initiator */ |
| 387 | ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED |
| 388 | << IEEE80211_HT_CAP_SM_PS_SHIFT; |
| 389 | |
| 390 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); |
| 391 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); |
| 392 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && |
| 393 | ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { |
| 394 | /* disable SMPS in TDLS responder */ |
| 395 | sta->sta.ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED |
| 396 | << IEEE80211_HT_CAP_SM_PS_SHIFT; |
| 397 | |
| 398 | /* the peer caps are already intersected with our own */ |
| 399 | memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap)); |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 400 | |
| 401 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); |
| 402 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); |
| 403 | } |
| 404 | |
Arik Nemtsov | 2cedd87 | 2014-11-09 18:50:13 +0200 | [diff] [blame] | 405 | if (ht_cap.ht_supported && |
| 406 | (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) |
| 407 | ieee80211_tdls_add_bss_coex_ie(skb); |
| 408 | |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 409 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
| 410 | |
| 411 | /* add any custom IEs that go before VHT capabilities */ |
| 412 | if (extra_ies_len) { |
| 413 | static const u8 before_vht_cap[] = { |
| 414 | WLAN_EID_SUPP_RATES, |
| 415 | WLAN_EID_COUNTRY, |
| 416 | WLAN_EID_EXT_SUPP_RATES, |
| 417 | WLAN_EID_SUPPORTED_CHANNELS, |
| 418 | WLAN_EID_RSN, |
| 419 | WLAN_EID_EXT_CAPABILITY, |
| 420 | WLAN_EID_QOS_CAPA, |
| 421 | WLAN_EID_FAST_BSS_TRANSITION, |
| 422 | WLAN_EID_TIMEOUT_INTERVAL, |
| 423 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, |
| 424 | WLAN_EID_MULTI_BAND, |
| 425 | }; |
| 426 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 427 | before_vht_cap, |
| 428 | ARRAY_SIZE(before_vht_cap), |
| 429 | offset); |
| 430 | pos = skb_put(skb, noffset - offset); |
| 431 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 432 | offset = noffset; |
| 433 | } |
| 434 | |
| 435 | /* build the VHT-cap similarly to the HT-cap */ |
| 436 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); |
Arik Nemtsov | 070e176 | 2015-03-30 11:16:23 +0300 | [diff] [blame] | 437 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
| 438 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && |
| 439 | vht_cap.vht_supported) { |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 440 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
| 441 | |
| 442 | /* the AID is present only when VHT is implemented */ |
Arik Nemtsov | 070e176 | 2015-03-30 11:16:23 +0300 | [diff] [blame] | 443 | if (action_code == WLAN_TDLS_SETUP_REQUEST) |
| 444 | ieee80211_tdls_add_aid(sdata, skb); |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 445 | |
| 446 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); |
| 447 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); |
| 448 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && |
| 449 | vht_cap.vht_supported && sta->sta.vht_cap.vht_supported) { |
| 450 | /* the peer caps are already intersected with our own */ |
| 451 | memcpy(&vht_cap, &sta->sta.vht_cap, sizeof(vht_cap)); |
| 452 | |
| 453 | /* the AID is present only when VHT is implemented */ |
| 454 | ieee80211_tdls_add_aid(sdata, skb); |
| 455 | |
| 456 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); |
| 457 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); |
| 458 | } |
| 459 | |
| 460 | rcu_read_unlock(); |
| 461 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 462 | /* add any remaining IEs */ |
| 463 | if (extra_ies_len) { |
| 464 | noffset = extra_ies_len; |
| 465 | pos = skb_put(skb, noffset - offset); |
| 466 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 467 | } |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 468 | |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 469 | } |
| 470 | |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 471 | static void |
| 472 | ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, |
| 473 | struct sk_buff *skb, const u8 *peer, |
| 474 | bool initiator, const u8 *extra_ies, |
| 475 | size_t extra_ies_len) |
| 476 | { |
| 477 | struct ieee80211_local *local = sdata->local; |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 478 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 479 | size_t offset = 0, noffset; |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 480 | struct sta_info *sta, *ap_sta; |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 481 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 482 | u8 *pos; |
| 483 | |
| 484 | rcu_read_lock(); |
| 485 | |
| 486 | sta = sta_info_get(sdata, peer); |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 487 | ap_sta = sta_info_get(sdata, ifmgd->bssid); |
| 488 | if (WARN_ON_ONCE(!sta || !ap_sta)) { |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 489 | rcu_read_unlock(); |
| 490 | return; |
| 491 | } |
| 492 | |
| 493 | /* add any custom IEs that go before the QoS IE */ |
| 494 | if (extra_ies_len) { |
| 495 | static const u8 before_qos[] = { |
| 496 | WLAN_EID_RSN, |
| 497 | }; |
| 498 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 499 | before_qos, |
| 500 | ARRAY_SIZE(before_qos), |
| 501 | offset); |
| 502 | pos = skb_put(skb, noffset - offset); |
| 503 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 504 | offset = noffset; |
| 505 | } |
| 506 | |
| 507 | /* 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] | 508 | if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme) |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 509 | ieee80211_tdls_add_wmm_param_ie(sdata, skb); |
| 510 | |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 511 | /* add any custom IEs that go before HT operation */ |
| 512 | if (extra_ies_len) { |
| 513 | static const u8 before_ht_op[] = { |
| 514 | WLAN_EID_RSN, |
| 515 | WLAN_EID_QOS_CAPA, |
| 516 | WLAN_EID_FAST_BSS_TRANSITION, |
| 517 | WLAN_EID_TIMEOUT_INTERVAL, |
| 518 | }; |
| 519 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 520 | before_ht_op, |
| 521 | ARRAY_SIZE(before_ht_op), |
| 522 | offset); |
| 523 | pos = skb_put(skb, noffset - offset); |
| 524 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 525 | offset = noffset; |
| 526 | } |
| 527 | |
| 528 | /* if HT support is only added in TDLS, we need an HT-operation IE */ |
| 529 | if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { |
Arik Nemtsov | 890b787 | 2015-05-07 15:30:41 +0300 | [diff] [blame^] | 530 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
| 531 | /* send an empty HT operation IE */ |
| 532 | ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap, |
| 533 | &sdata->vif.bss_conf.chandef, 0); |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 534 | } |
| 535 | |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 536 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
| 537 | |
| 538 | /* only include VHT-operation if not on the 2.4GHz band */ |
Arik Nemtsov | 890b787 | 2015-05-07 15:30:41 +0300 | [diff] [blame^] | 539 | if (band != IEEE80211_BAND_2GHZ && sta->sta.vht_cap.vht_supported) { |
| 540 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); |
| 541 | ieee80211_ie_build_vht_oper(pos, &sta->sta.vht_cap, |
| 542 | &sdata->vif.bss_conf.chandef); |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 543 | } |
| 544 | |
Arik Nemtsov | 13cc8a4 | 2014-07-17 17:14:26 +0300 | [diff] [blame] | 545 | rcu_read_unlock(); |
| 546 | |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 547 | /* add any remaining IEs */ |
| 548 | if (extra_ies_len) { |
| 549 | noffset = extra_ies_len; |
| 550 | pos = skb_put(skb, noffset - offset); |
| 551 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 552 | } |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 553 | } |
| 554 | |
Arik Nemtsov | a7a6bdd | 2014-11-09 18:50:19 +0200 | [diff] [blame] | 555 | static void |
| 556 | ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata, |
| 557 | struct sk_buff *skb, const u8 *peer, |
| 558 | bool initiator, const u8 *extra_ies, |
| 559 | size_t extra_ies_len, u8 oper_class, |
| 560 | struct cfg80211_chan_def *chandef) |
| 561 | { |
| 562 | struct ieee80211_tdls_data *tf; |
| 563 | size_t offset = 0, noffset; |
| 564 | u8 *pos; |
| 565 | |
| 566 | if (WARN_ON_ONCE(!chandef)) |
| 567 | return; |
| 568 | |
| 569 | tf = (void *)skb->data; |
| 570 | tf->u.chan_switch_req.target_channel = |
| 571 | ieee80211_frequency_to_channel(chandef->chan->center_freq); |
| 572 | tf->u.chan_switch_req.oper_class = oper_class; |
| 573 | |
| 574 | if (extra_ies_len) { |
| 575 | static const u8 before_lnkie[] = { |
| 576 | WLAN_EID_SECONDARY_CHANNEL_OFFSET, |
| 577 | }; |
| 578 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, |
| 579 | before_lnkie, |
| 580 | ARRAY_SIZE(before_lnkie), |
| 581 | offset); |
| 582 | pos = skb_put(skb, noffset - offset); |
| 583 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 584 | offset = noffset; |
| 585 | } |
| 586 | |
| 587 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
| 588 | |
| 589 | /* add any remaining IEs */ |
| 590 | if (extra_ies_len) { |
| 591 | noffset = extra_ies_len; |
| 592 | pos = skb_put(skb, noffset - offset); |
| 593 | memcpy(pos, extra_ies + offset, noffset - offset); |
| 594 | } |
| 595 | } |
| 596 | |
Arik Nemtsov | 8a4d32f | 2014-11-09 18:50:20 +0200 | [diff] [blame] | 597 | static void |
| 598 | ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata, |
| 599 | struct sk_buff *skb, const u8 *peer, |
| 600 | u16 status_code, bool initiator, |
| 601 | const u8 *extra_ies, |
| 602 | size_t extra_ies_len) |
| 603 | { |
| 604 | if (status_code == 0) |
| 605 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
| 606 | |
| 607 | if (extra_ies_len) |
| 608 | memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len); |
| 609 | } |
| 610 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 611 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
| 612 | struct sk_buff *skb, const u8 *peer, |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 613 | u8 action_code, u16 status_code, |
| 614 | bool initiator, const u8 *extra_ies, |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 615 | size_t extra_ies_len, u8 oper_class, |
| 616 | struct cfg80211_chan_def *chandef) |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 617 | { |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 618 | switch (action_code) { |
| 619 | case WLAN_TDLS_SETUP_REQUEST: |
| 620 | case WLAN_TDLS_SETUP_RESPONSE: |
| 621 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 622 | if (status_code == 0) |
| 623 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, |
| 624 | action_code, |
| 625 | initiator, |
| 626 | extra_ies, |
| 627 | extra_ies_len); |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 628 | break; |
| 629 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 6f7eaa4 | 2014-07-17 17:14:24 +0300 | [diff] [blame] | 630 | if (status_code == 0) |
| 631 | ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer, |
| 632 | initiator, extra_ies, |
| 633 | extra_ies_len); |
| 634 | break; |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 635 | case WLAN_TDLS_TEARDOWN: |
| 636 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | f09a87d | 2014-07-17 17:14:20 +0300 | [diff] [blame] | 637 | if (extra_ies_len) |
| 638 | memcpy(skb_put(skb, extra_ies_len), extra_ies, |
| 639 | extra_ies_len); |
Arik Nemtsov | 1606ef4 | 2014-07-17 17:14:21 +0300 | [diff] [blame] | 640 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
| 641 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 642 | break; |
Arik Nemtsov | a7a6bdd | 2014-11-09 18:50:19 +0200 | [diff] [blame] | 643 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
| 644 | ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer, |
| 645 | initiator, extra_ies, |
| 646 | extra_ies_len, |
| 647 | oper_class, chandef); |
| 648 | break; |
Arik Nemtsov | 8a4d32f | 2014-11-09 18:50:20 +0200 | [diff] [blame] | 649 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
| 650 | ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer, |
| 651 | status_code, |
| 652 | initiator, extra_ies, |
| 653 | extra_ies_len); |
| 654 | break; |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 655 | } |
| 656 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 657 | } |
| 658 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 659 | static int |
| 660 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 661 | const u8 *peer, u8 action_code, u8 dialog_token, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 662 | u16 status_code, struct sk_buff *skb) |
| 663 | { |
| 664 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 665 | struct ieee80211_tdls_data *tf; |
| 666 | |
| 667 | tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); |
| 668 | |
| 669 | memcpy(tf->da, peer, ETH_ALEN); |
| 670 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); |
| 671 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); |
| 672 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; |
| 673 | |
Arik Nemtsov | 59cd85c | 2014-09-09 17:11:02 +0300 | [diff] [blame] | 674 | /* network header is after the ethernet header */ |
| 675 | skb_set_network_header(skb, ETH_HLEN); |
| 676 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 677 | switch (action_code) { |
| 678 | case WLAN_TDLS_SETUP_REQUEST: |
| 679 | tf->category = WLAN_CATEGORY_TDLS; |
| 680 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; |
| 681 | |
| 682 | skb_put(skb, sizeof(tf->u.setup_req)); |
| 683 | tf->u.setup_req.dialog_token = dialog_token; |
| 684 | tf->u.setup_req.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 685 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 686 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 687 | break; |
| 688 | case WLAN_TDLS_SETUP_RESPONSE: |
| 689 | tf->category = WLAN_CATEGORY_TDLS; |
| 690 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; |
| 691 | |
| 692 | skb_put(skb, sizeof(tf->u.setup_resp)); |
| 693 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); |
| 694 | tf->u.setup_resp.dialog_token = dialog_token; |
| 695 | tf->u.setup_resp.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 696 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 697 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 698 | break; |
| 699 | case WLAN_TDLS_SETUP_CONFIRM: |
| 700 | tf->category = WLAN_CATEGORY_TDLS; |
| 701 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; |
| 702 | |
| 703 | skb_put(skb, sizeof(tf->u.setup_cfm)); |
| 704 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); |
| 705 | tf->u.setup_cfm.dialog_token = dialog_token; |
| 706 | break; |
| 707 | case WLAN_TDLS_TEARDOWN: |
| 708 | tf->category = WLAN_CATEGORY_TDLS; |
| 709 | tf->action_code = WLAN_TDLS_TEARDOWN; |
| 710 | |
| 711 | skb_put(skb, sizeof(tf->u.teardown)); |
| 712 | tf->u.teardown.reason_code = cpu_to_le16(status_code); |
| 713 | break; |
| 714 | case WLAN_TDLS_DISCOVERY_REQUEST: |
| 715 | tf->category = WLAN_CATEGORY_TDLS; |
| 716 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; |
| 717 | |
| 718 | skb_put(skb, sizeof(tf->u.discover_req)); |
| 719 | tf->u.discover_req.dialog_token = dialog_token; |
| 720 | break; |
Arik Nemtsov | a7a6bdd | 2014-11-09 18:50:19 +0200 | [diff] [blame] | 721 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
| 722 | tf->category = WLAN_CATEGORY_TDLS; |
| 723 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; |
| 724 | |
| 725 | skb_put(skb, sizeof(tf->u.chan_switch_req)); |
| 726 | break; |
Arik Nemtsov | 8a4d32f | 2014-11-09 18:50:20 +0200 | [diff] [blame] | 727 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
| 728 | tf->category = WLAN_CATEGORY_TDLS; |
| 729 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; |
| 730 | |
| 731 | skb_put(skb, sizeof(tf->u.chan_switch_resp)); |
| 732 | tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code); |
| 733 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 734 | default: |
| 735 | return -EINVAL; |
| 736 | } |
| 737 | |
| 738 | return 0; |
| 739 | } |
| 740 | |
| 741 | static int |
| 742 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 743 | const u8 *peer, u8 action_code, u8 dialog_token, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 744 | u16 status_code, struct sk_buff *skb) |
| 745 | { |
| 746 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 747 | struct ieee80211_mgmt *mgmt; |
| 748 | |
| 749 | mgmt = (void *)skb_put(skb, 24); |
| 750 | memset(mgmt, 0, 24); |
| 751 | memcpy(mgmt->da, peer, ETH_ALEN); |
| 752 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
| 753 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
| 754 | |
| 755 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
| 756 | IEEE80211_STYPE_ACTION); |
| 757 | |
| 758 | switch (action_code) { |
| 759 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 760 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); |
| 761 | mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; |
| 762 | mgmt->u.action.u.tdls_discover_resp.action_code = |
| 763 | WLAN_PUB_ACTION_TDLS_DISCOVER_RES; |
| 764 | mgmt->u.action.u.tdls_discover_resp.dialog_token = |
| 765 | dialog_token; |
| 766 | mgmt->u.action.u.tdls_discover_resp.capability = |
Arik Nemtsov | dd8c0b0 | 2014-07-17 17:14:22 +0300 | [diff] [blame] | 767 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
| 768 | status_code)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 769 | break; |
| 770 | default: |
| 771 | return -EINVAL; |
| 772 | } |
| 773 | |
| 774 | return 0; |
| 775 | } |
| 776 | |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 777 | static struct sk_buff * |
| 778 | ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata, |
| 779 | const u8 *peer, u8 action_code, |
| 780 | u8 dialog_token, u16 status_code, |
| 781 | bool initiator, const u8 *extra_ies, |
| 782 | size_t extra_ies_len, u8 oper_class, |
| 783 | struct cfg80211_chan_def *chandef) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 784 | { |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 785 | struct ieee80211_local *local = sdata->local; |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 786 | struct sk_buff *skb; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 787 | int ret; |
| 788 | |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 789 | skb = netdev_alloc_skb(sdata->dev, |
Liad Kaufman | 1277b4a | 2014-11-09 18:50:08 +0200 | [diff] [blame] | 790 | local->hw.extra_tx_headroom + |
| 791 | max(sizeof(struct ieee80211_mgmt), |
| 792 | sizeof(struct ieee80211_tdls_data)) + |
| 793 | 50 + /* supported rates */ |
| 794 | 7 + /* ext capab */ |
| 795 | 26 + /* max(WMM-info, WMM-param) */ |
| 796 | 2 + max(sizeof(struct ieee80211_ht_cap), |
| 797 | sizeof(struct ieee80211_ht_operation)) + |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 798 | 2 + max(sizeof(struct ieee80211_vht_cap), |
| 799 | sizeof(struct ieee80211_vht_operation)) + |
Arik Nemtsov | f0d29cb | 2014-11-09 18:50:12 +0200 | [diff] [blame] | 800 | 50 + /* supported channels */ |
Arik Nemtsov | 2cedd87 | 2014-11-09 18:50:13 +0200 | [diff] [blame] | 801 | 3 + /* 40/20 BSS coex */ |
Arik Nemtsov | fb28ec0 | 2015-03-01 09:10:02 +0200 | [diff] [blame] | 802 | 4 + /* AID */ |
Arik Nemtsov | a38700d | 2015-03-18 08:46:08 +0200 | [diff] [blame] | 803 | 4 + /* oper classes */ |
Liad Kaufman | 1277b4a | 2014-11-09 18:50:08 +0200 | [diff] [blame] | 804 | extra_ies_len + |
| 805 | sizeof(struct ieee80211_tdls_lnkie)); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 806 | if (!skb) |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 807 | return NULL; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 808 | |
| 809 | skb_reserve(skb, local->hw.extra_tx_headroom); |
| 810 | |
| 811 | switch (action_code) { |
| 812 | case WLAN_TDLS_SETUP_REQUEST: |
| 813 | case WLAN_TDLS_SETUP_RESPONSE: |
| 814 | case WLAN_TDLS_SETUP_CONFIRM: |
| 815 | case WLAN_TDLS_TEARDOWN: |
| 816 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | a7a6bdd | 2014-11-09 18:50:19 +0200 | [diff] [blame] | 817 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
Arik Nemtsov | 8a4d32f | 2014-11-09 18:50:20 +0200 | [diff] [blame] | 818 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 819 | ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy, |
| 820 | sdata->dev, peer, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 821 | action_code, dialog_token, |
| 822 | status_code, skb); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 823 | break; |
| 824 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 825 | ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev, |
| 826 | peer, action_code, |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 827 | dialog_token, status_code, |
| 828 | skb); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 829 | break; |
| 830 | default: |
| 831 | ret = -ENOTSUPP; |
| 832 | break; |
| 833 | } |
| 834 | |
| 835 | if (ret < 0) |
| 836 | goto fail; |
| 837 | |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 838 | ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code, |
| 839 | initiator, extra_ies, extra_ies_len, oper_class, |
| 840 | chandef); |
| 841 | return skb; |
| 842 | |
| 843 | fail: |
| 844 | dev_kfree_skb(skb); |
| 845 | return NULL; |
| 846 | } |
| 847 | |
| 848 | static int |
| 849 | ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev, |
| 850 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 851 | u16 status_code, u32 peer_capability, |
| 852 | bool initiator, const u8 *extra_ies, |
| 853 | size_t extra_ies_len, u8 oper_class, |
| 854 | struct cfg80211_chan_def *chandef) |
| 855 | { |
| 856 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 857 | struct sk_buff *skb = NULL; |
| 858 | struct sta_info *sta; |
| 859 | u32 flags = 0; |
| 860 | int ret = 0; |
| 861 | |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 862 | rcu_read_lock(); |
| 863 | sta = sta_info_get(sdata, peer); |
| 864 | |
| 865 | /* infer the initiator if we can, to support old userspace */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 866 | switch (action_code) { |
| 867 | case WLAN_TDLS_SETUP_REQUEST: |
Arik Nemtsov | 8b94148 | 2014-10-22 12:32:48 +0300 | [diff] [blame] | 868 | if (sta) { |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 869 | set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
Arik Nemtsov | 8b94148 | 2014-10-22 12:32:48 +0300 | [diff] [blame] | 870 | sta->sta.tdls_initiator = false; |
| 871 | } |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 872 | /* fall-through */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 873 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 874 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 875 | initiator = true; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 876 | break; |
| 877 | case WLAN_TDLS_SETUP_RESPONSE: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 878 | /* |
| 879 | * In some testing scenarios, we send a request and response. |
| 880 | * Make the last packet sent take effect for the initiator |
| 881 | * value. |
| 882 | */ |
Arik Nemtsov | 8b94148 | 2014-10-22 12:32:48 +0300 | [diff] [blame] | 883 | if (sta) { |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 884 | clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
Arik Nemtsov | 8b94148 | 2014-10-22 12:32:48 +0300 | [diff] [blame] | 885 | sta->sta.tdls_initiator = true; |
| 886 | } |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 887 | /* fall-through */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 888 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 889 | initiator = false; |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 890 | break; |
| 891 | case WLAN_TDLS_TEARDOWN: |
Arik Nemtsov | a7a6bdd | 2014-11-09 18:50:19 +0200 | [diff] [blame] | 892 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
Arik Nemtsov | 8a4d32f | 2014-11-09 18:50:20 +0200 | [diff] [blame] | 893 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 894 | /* any value is ok */ |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 895 | break; |
| 896 | default: |
| 897 | ret = -ENOTSUPP; |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 898 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 899 | } |
| 900 | |
Arik Nemtsov | 46792a2 | 2014-07-17 17:14:19 +0300 | [diff] [blame] | 901 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR)) |
| 902 | initiator = true; |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 903 | |
Arik Nemtsov | 626911c | 2014-07-17 17:14:17 +0300 | [diff] [blame] | 904 | rcu_read_unlock(); |
| 905 | if (ret < 0) |
| 906 | goto fail; |
| 907 | |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 908 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer, action_code, |
| 909 | dialog_token, status_code, |
| 910 | initiator, extra_ies, |
| 911 | extra_ies_len, oper_class, |
| 912 | chandef); |
| 913 | if (!skb) { |
| 914 | ret = -EINVAL; |
| 915 | goto fail; |
| 916 | } |
| 917 | |
| 918 | if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 919 | ieee80211_tx_skb(sdata, skb); |
| 920 | return 0; |
| 921 | } |
| 922 | |
| 923 | /* |
| 924 | * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise |
| 925 | * we should default to AC_VI. |
| 926 | */ |
| 927 | switch (action_code) { |
| 928 | case WLAN_TDLS_SETUP_REQUEST: |
| 929 | case WLAN_TDLS_SETUP_RESPONSE: |
| 930 | skb_set_queue_mapping(skb, IEEE80211_AC_BK); |
| 931 | skb->priority = 2; |
| 932 | break; |
| 933 | default: |
| 934 | skb_set_queue_mapping(skb, IEEE80211_AC_VI); |
| 935 | skb->priority = 5; |
| 936 | break; |
| 937 | } |
| 938 | |
Liad Kaufman | 1277b4a | 2014-11-09 18:50:08 +0200 | [diff] [blame] | 939 | /* |
| 940 | * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress. |
| 941 | * Later, if no ACK is returned from peer, we will re-send the teardown |
| 942 | * packet through the AP. |
| 943 | */ |
| 944 | if ((action_code == WLAN_TDLS_TEARDOWN) && |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 945 | (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { |
Liad Kaufman | 1277b4a | 2014-11-09 18:50:08 +0200 | [diff] [blame] | 946 | bool try_resend; /* Should we keep skb for possible resend */ |
| 947 | |
| 948 | /* If not sending directly to peer - no point in keeping skb */ |
| 949 | rcu_read_lock(); |
| 950 | sta = sta_info_get(sdata, peer); |
| 951 | try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
| 952 | rcu_read_unlock(); |
| 953 | |
| 954 | spin_lock_bh(&sdata->u.mgd.teardown_lock); |
| 955 | if (try_resend && !sdata->u.mgd.teardown_skb) { |
| 956 | /* Mark it as requiring TX status callback */ |
| 957 | flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | |
| 958 | IEEE80211_TX_INTFL_MLME_CONN_TX; |
| 959 | |
| 960 | /* |
| 961 | * skb is copied since mac80211 will later set |
| 962 | * properties that might not be the same as the AP, |
| 963 | * such as encryption, QoS, addresses, etc. |
| 964 | * |
| 965 | * No problem if skb_copy() fails, so no need to check. |
| 966 | */ |
| 967 | sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC); |
| 968 | sdata->u.mgd.orig_teardown_skb = skb; |
| 969 | } |
| 970 | spin_unlock_bh(&sdata->u.mgd.teardown_lock); |
| 971 | } |
| 972 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 973 | /* disable bottom halves when entering the Tx path */ |
| 974 | local_bh_disable(); |
Liad Kaufman | 1277b4a | 2014-11-09 18:50:08 +0200 | [diff] [blame] | 975 | __ieee80211_subif_start_xmit(skb, dev, flags); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 976 | local_bh_enable(); |
| 977 | |
| 978 | return ret; |
| 979 | |
| 980 | fail: |
| 981 | dev_kfree_skb(skb); |
| 982 | return ret; |
| 983 | } |
| 984 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 985 | static int |
| 986 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, |
| 987 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 988 | u16 status_code, u32 peer_capability, bool initiator, |
| 989 | const u8 *extra_ies, size_t extra_ies_len) |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 990 | { |
| 991 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 992 | struct ieee80211_local *local = sdata->local; |
| 993 | int ret; |
| 994 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 995 | mutex_lock(&local->mtx); |
| 996 | |
| 997 | /* we don't support concurrent TDLS peer setups */ |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 998 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) && |
| 999 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1000 | ret = -EBUSY; |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 1001 | goto out_unlock; |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1002 | } |
| 1003 | |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 1004 | /* |
| 1005 | * make sure we have a STA representing the peer so we drop or buffer |
| 1006 | * 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] | 1007 | * during setup through the AP path. |
| 1008 | * Allow error packets to be sent - sometimes we don't even add a STA |
| 1009 | * before failing the setup. |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 1010 | */ |
Arik Nemtsov | 6ae32e5 | 2014-07-17 17:14:18 +0300 | [diff] [blame] | 1011 | if (status_code == 0) { |
| 1012 | rcu_read_lock(); |
| 1013 | if (!sta_info_get(sdata, peer)) { |
| 1014 | rcu_read_unlock(); |
| 1015 | ret = -ENOLINK; |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 1016 | goto out_unlock; |
Arik Nemtsov | 6ae32e5 | 2014-07-17 17:14:18 +0300 | [diff] [blame] | 1017 | } |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 1018 | rcu_read_unlock(); |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 1019 | } |
Arik Nemtsov | 7adc3e4 | 2014-06-11 17:18:26 +0300 | [diff] [blame] | 1020 | |
Emmanuel Grumbach | 3b24f4c | 2015-01-07 15:42:39 +0200 | [diff] [blame] | 1021 | ieee80211_flush_queues(local, sdata, false); |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 1022 | memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN); |
| 1023 | mutex_unlock(&local->mtx); |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 1024 | |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 1025 | /* we cannot take the mutex while preparing the setup packet */ |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1026 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
| 1027 | dialog_token, status_code, |
Arik Nemtsov | 2fb6b9b | 2014-06-11 17:18:22 +0300 | [diff] [blame] | 1028 | peer_capability, initiator, |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 1029 | extra_ies, extra_ies_len, 0, |
| 1030 | NULL); |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 1031 | if (ret < 0) { |
| 1032 | mutex_lock(&local->mtx); |
| 1033 | eth_zero_addr(sdata->u.mgd.tdls_peer); |
| 1034 | mutex_unlock(&local->mtx); |
| 1035 | return ret; |
| 1036 | } |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1037 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 1038 | ieee80211_queue_delayed_work(&sdata->local->hw, |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 1039 | &sdata->u.mgd.tdls_peer_del_work, |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 1040 | TDLS_PEER_SETUP_TIMEOUT); |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 1041 | return 0; |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1042 | |
Arik Nemtsov | ae2e9fb | 2015-03-01 09:10:09 +0200 | [diff] [blame] | 1043 | out_unlock: |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1044 | mutex_unlock(&local->mtx); |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 1045 | return ret; |
| 1046 | } |
| 1047 | |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 1048 | static int |
| 1049 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, |
| 1050 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 1051 | u16 status_code, u32 peer_capability, |
| 1052 | bool initiator, const u8 *extra_ies, |
| 1053 | size_t extra_ies_len) |
| 1054 | { |
| 1055 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1056 | struct ieee80211_local *local = sdata->local; |
| 1057 | struct sta_info *sta; |
| 1058 | int ret; |
| 1059 | |
| 1060 | /* |
| 1061 | * No packets can be transmitted to the peer via the AP during setup - |
| 1062 | * the STA is set as a TDLS peer, but is not authorized. |
| 1063 | * During teardown, we prevent direct transmissions by stopping the |
| 1064 | * queues and flushing all direct packets. |
| 1065 | */ |
| 1066 | ieee80211_stop_vif_queues(local, sdata, |
| 1067 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); |
Emmanuel Grumbach | 3b24f4c | 2015-01-07 15:42:39 +0200 | [diff] [blame] | 1068 | ieee80211_flush_queues(local, sdata, false); |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 1069 | |
| 1070 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
| 1071 | dialog_token, status_code, |
| 1072 | peer_capability, initiator, |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 1073 | extra_ies, extra_ies_len, 0, |
| 1074 | NULL); |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 1075 | if (ret < 0) |
| 1076 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", |
| 1077 | ret); |
| 1078 | |
| 1079 | /* |
| 1080 | * Remove the STA AUTH flag to force further traffic through the AP. If |
| 1081 | * the STA was unreachable, it was already removed. |
| 1082 | */ |
| 1083 | rcu_read_lock(); |
| 1084 | sta = sta_info_get(sdata, peer); |
| 1085 | if (sta) |
| 1086 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
| 1087 | rcu_read_unlock(); |
| 1088 | |
| 1089 | ieee80211_wake_vif_queues(local, sdata, |
| 1090 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); |
| 1091 | |
| 1092 | return 0; |
| 1093 | } |
| 1094 | |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 1095 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
| 1096 | const u8 *peer, u8 action_code, u8 dialog_token, |
| 1097 | u16 status_code, u32 peer_capability, |
| 1098 | bool initiator, const u8 *extra_ies, |
| 1099 | size_t extra_ies_len) |
| 1100 | { |
| 1101 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1102 | int ret; |
| 1103 | |
| 1104 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) |
| 1105 | return -ENOTSUPP; |
| 1106 | |
| 1107 | /* make sure we are in managed mode, and associated */ |
| 1108 | if (sdata->vif.type != NL80211_IFTYPE_STATION || |
| 1109 | !sdata->u.mgd.associated) |
| 1110 | return -EINVAL; |
| 1111 | |
| 1112 | switch (action_code) { |
| 1113 | case WLAN_TDLS_SETUP_REQUEST: |
| 1114 | case WLAN_TDLS_SETUP_RESPONSE: |
| 1115 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, |
| 1116 | dialog_token, status_code, |
| 1117 | peer_capability, initiator, |
| 1118 | extra_ies, extra_ies_len); |
| 1119 | break; |
| 1120 | case WLAN_TDLS_TEARDOWN: |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 1121 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
| 1122 | action_code, dialog_token, |
| 1123 | status_code, |
| 1124 | peer_capability, initiator, |
| 1125 | extra_ies, extra_ies_len); |
| 1126 | break; |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 1127 | case WLAN_TDLS_DISCOVERY_REQUEST: |
Arik Nemtsov | ee10f2c | 2014-06-11 17:18:27 +0300 | [diff] [blame] | 1128 | /* |
| 1129 | * Protect the discovery so we can hear the TDLS discovery |
| 1130 | * response frame. It is transmitted directly and not buffered |
| 1131 | * by the AP. |
| 1132 | */ |
| 1133 | drv_mgd_protect_tdls_discover(sdata->local, sdata); |
| 1134 | /* fall-through */ |
| 1135 | case WLAN_TDLS_SETUP_CONFIRM: |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 1136 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
| 1137 | /* no special handling */ |
| 1138 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, |
| 1139 | action_code, |
| 1140 | dialog_token, |
| 1141 | status_code, |
| 1142 | peer_capability, |
| 1143 | initiator, extra_ies, |
Arik Nemtsov | c273390 | 2014-11-09 18:50:16 +0200 | [diff] [blame] | 1144 | extra_ies_len, 0, NULL); |
Arik Nemtsov | 191dd46 | 2014-06-11 17:18:23 +0300 | [diff] [blame] | 1145 | break; |
| 1146 | default: |
| 1147 | ret = -EOPNOTSUPP; |
| 1148 | break; |
| 1149 | } |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1150 | |
| 1151 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", |
| 1152 | action_code, peer, ret); |
| 1153 | return ret; |
| 1154 | } |
| 1155 | |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1156 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
Johannes Berg | 3b3a016 | 2014-05-19 17:19:31 +0200 | [diff] [blame] | 1157 | const u8 *peer, enum nl80211_tdls_operation oper) |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1158 | { |
| 1159 | struct sta_info *sta; |
| 1160 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1161 | struct ieee80211_local *local = sdata->local; |
| 1162 | int ret; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1163 | |
| 1164 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) |
| 1165 | return -ENOTSUPP; |
| 1166 | |
| 1167 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
| 1168 | return -EINVAL; |
| 1169 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1170 | switch (oper) { |
| 1171 | case NL80211_TDLS_ENABLE_LINK: |
| 1172 | case NL80211_TDLS_DISABLE_LINK: |
| 1173 | break; |
| 1174 | case NL80211_TDLS_TEARDOWN: |
| 1175 | case NL80211_TDLS_SETUP: |
| 1176 | case NL80211_TDLS_DISCOVERY_REQ: |
| 1177 | /* We don't support in-driver setup/teardown/discovery */ |
| 1178 | return -ENOTSUPP; |
| 1179 | } |
| 1180 | |
| 1181 | mutex_lock(&local->mtx); |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1182 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
| 1183 | |
| 1184 | switch (oper) { |
| 1185 | case NL80211_TDLS_ENABLE_LINK: |
| 1186 | rcu_read_lock(); |
| 1187 | sta = sta_info_get(sdata, peer); |
| 1188 | if (!sta) { |
| 1189 | rcu_read_unlock(); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1190 | ret = -ENOLINK; |
| 1191 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1192 | } |
| 1193 | |
| 1194 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
| 1195 | rcu_read_unlock(); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1196 | |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 1197 | WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) || |
| 1198 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1199 | ret = 0; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1200 | break; |
| 1201 | case NL80211_TDLS_DISABLE_LINK: |
Liad Kaufman | bb3f848 | 2014-07-17 17:14:31 +0300 | [diff] [blame] | 1202 | /* |
| 1203 | * The teardown message in ieee80211_tdls_mgmt_teardown() was |
| 1204 | * created while the queues were stopped, so it might still be |
| 1205 | * pending. Before flushing the queues we need to be sure the |
| 1206 | * message is handled by the tasklet handling pending messages, |
| 1207 | * otherwise we might start destroying the station before |
| 1208 | * sending the teardown packet. |
| 1209 | * Note that this only forces the tasklet to flush pendings - |
| 1210 | * not to stop the tasklet from rescheduling itself. |
| 1211 | */ |
| 1212 | tasklet_kill(&local->tx_pending_tasklet); |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 1213 | /* flush a potentially queued teardown packet */ |
Emmanuel Grumbach | 3b24f4c | 2015-01-07 15:42:39 +0200 | [diff] [blame] | 1214 | ieee80211_flush_queues(local, sdata, false); |
Arik Nemtsov | db67d66 | 2014-06-11 17:18:24 +0300 | [diff] [blame] | 1215 | |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1216 | ret = sta_info_destroy_addr(sdata, peer); |
| 1217 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1218 | default: |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1219 | ret = -ENOTSUPP; |
| 1220 | break; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1221 | } |
| 1222 | |
Arik Nemtsov | 81dd2b8 | 2014-07-17 17:14:25 +0300 | [diff] [blame] | 1223 | if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
| 1224 | cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work); |
| 1225 | eth_zero_addr(sdata->u.mgd.tdls_peer); |
Arik Nemtsov | 17e6a59 | 2014-06-11 17:18:20 +0300 | [diff] [blame] | 1226 | } |
| 1227 | |
| 1228 | mutex_unlock(&local->mtx); |
| 1229 | return ret; |
Arik Nemtsov | 95224fe | 2014-05-01 10:17:28 +0300 | [diff] [blame] | 1230 | } |
Arik Nemtsov | c887f0d3 | 2014-06-11 17:18:25 +0300 | [diff] [blame] | 1231 | |
| 1232 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, |
| 1233 | enum nl80211_tdls_operation oper, |
| 1234 | u16 reason_code, gfp_t gfp) |
| 1235 | { |
| 1236 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); |
| 1237 | |
| 1238 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { |
| 1239 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", |
| 1240 | oper); |
| 1241 | return; |
| 1242 | } |
| 1243 | |
| 1244 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); |
| 1245 | } |
| 1246 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); |
Arik Nemtsov | a7a6bdd | 2014-11-09 18:50:19 +0200 | [diff] [blame] | 1247 | |
| 1248 | static void |
| 1249 | iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout) |
| 1250 | { |
| 1251 | struct ieee80211_ch_switch_timing *ch_sw; |
| 1252 | |
| 1253 | *buf++ = WLAN_EID_CHAN_SWITCH_TIMING; |
| 1254 | *buf++ = sizeof(struct ieee80211_ch_switch_timing); |
| 1255 | |
| 1256 | ch_sw = (void *)buf; |
| 1257 | ch_sw->switch_time = cpu_to_le16(switch_time); |
| 1258 | ch_sw->switch_timeout = cpu_to_le16(switch_timeout); |
| 1259 | } |
| 1260 | |
| 1261 | /* find switch timing IE in SKB ready for Tx */ |
| 1262 | static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb) |
| 1263 | { |
| 1264 | struct ieee80211_tdls_data *tf; |
| 1265 | const u8 *ie_start; |
| 1266 | |
| 1267 | /* |
| 1268 | * Get the offset for the new location of the switch timing IE. |
| 1269 | * The SKB network header will now point to the "payload_type" |
| 1270 | * element of the TDLS data frame struct. |
| 1271 | */ |
| 1272 | tf = container_of(skb->data + skb_network_offset(skb), |
| 1273 | struct ieee80211_tdls_data, payload_type); |
| 1274 | ie_start = tf->u.chan_switch_req.variable; |
| 1275 | return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start, |
| 1276 | skb->len - (ie_start - skb->data)); |
| 1277 | } |
| 1278 | |
| 1279 | static struct sk_buff * |
| 1280 | ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class, |
| 1281 | struct cfg80211_chan_def *chandef, |
| 1282 | u32 *ch_sw_tm_ie_offset) |
| 1283 | { |
| 1284 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 1285 | u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) + |
| 1286 | 2 + sizeof(struct ieee80211_ch_switch_timing)]; |
| 1287 | int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing); |
| 1288 | u8 *pos = extra_ies; |
| 1289 | struct sk_buff *skb; |
| 1290 | |
| 1291 | /* |
| 1292 | * if chandef points to a wide channel add a Secondary-Channel |
| 1293 | * Offset information element |
| 1294 | */ |
| 1295 | if (chandef->width == NL80211_CHAN_WIDTH_40) { |
| 1296 | struct ieee80211_sec_chan_offs_ie *sec_chan_ie; |
| 1297 | bool ht40plus; |
| 1298 | |
| 1299 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; |
| 1300 | *pos++ = sizeof(*sec_chan_ie); |
| 1301 | sec_chan_ie = (void *)pos; |
| 1302 | |
| 1303 | ht40plus = cfg80211_get_chandef_type(chandef) == |
| 1304 | NL80211_CHAN_HT40PLUS; |
| 1305 | sec_chan_ie->sec_chan_offs = ht40plus ? |
| 1306 | IEEE80211_HT_PARAM_CHA_SEC_ABOVE : |
| 1307 | IEEE80211_HT_PARAM_CHA_SEC_BELOW; |
| 1308 | pos += sizeof(*sec_chan_ie); |
| 1309 | |
| 1310 | extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie); |
| 1311 | } |
| 1312 | |
| 1313 | /* just set the values to 0, this is a template */ |
| 1314 | iee80211_tdls_add_ch_switch_timing(pos, 0, 0); |
| 1315 | |
| 1316 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, |
| 1317 | WLAN_TDLS_CHANNEL_SWITCH_REQUEST, |
| 1318 | 0, 0, !sta->sta.tdls_initiator, |
| 1319 | extra_ies, extra_ies_len, |
| 1320 | oper_class, chandef); |
| 1321 | if (!skb) |
| 1322 | return NULL; |
| 1323 | |
| 1324 | skb = ieee80211_build_data_template(sdata, skb, 0); |
| 1325 | if (IS_ERR(skb)) { |
| 1326 | tdls_dbg(sdata, "Failed building TDLS channel switch frame\n"); |
| 1327 | return NULL; |
| 1328 | } |
| 1329 | |
| 1330 | if (ch_sw_tm_ie_offset) { |
| 1331 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); |
| 1332 | |
| 1333 | if (!tm_ie) { |
| 1334 | tdls_dbg(sdata, "No switch timing IE in TDLS switch\n"); |
| 1335 | dev_kfree_skb_any(skb); |
| 1336 | return NULL; |
| 1337 | } |
| 1338 | |
| 1339 | *ch_sw_tm_ie_offset = tm_ie - skb->data; |
| 1340 | } |
| 1341 | |
| 1342 | tdls_dbg(sdata, |
| 1343 | "TDLS channel switch request template for %pM ch %d width %d\n", |
| 1344 | sta->sta.addr, chandef->chan->center_freq, chandef->width); |
| 1345 | return skb; |
| 1346 | } |
| 1347 | |
| 1348 | int |
| 1349 | ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev, |
| 1350 | const u8 *addr, u8 oper_class, |
| 1351 | struct cfg80211_chan_def *chandef) |
| 1352 | { |
| 1353 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1354 | struct ieee80211_local *local = sdata->local; |
| 1355 | struct sta_info *sta; |
| 1356 | struct sk_buff *skb = NULL; |
| 1357 | u32 ch_sw_tm_ie; |
| 1358 | int ret; |
| 1359 | |
| 1360 | mutex_lock(&local->sta_mtx); |
| 1361 | sta = sta_info_get(sdata, addr); |
| 1362 | if (!sta) { |
| 1363 | tdls_dbg(sdata, |
| 1364 | "Invalid TDLS peer %pM for channel switch request\n", |
| 1365 | addr); |
| 1366 | ret = -ENOENT; |
| 1367 | goto out; |
| 1368 | } |
| 1369 | |
| 1370 | if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) { |
| 1371 | tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n", |
| 1372 | addr); |
| 1373 | ret = -ENOTSUPP; |
| 1374 | goto out; |
| 1375 | } |
| 1376 | |
| 1377 | skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef, |
| 1378 | &ch_sw_tm_ie); |
| 1379 | if (!skb) { |
| 1380 | ret = -ENOENT; |
| 1381 | goto out; |
| 1382 | } |
| 1383 | |
| 1384 | ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class, |
| 1385 | chandef, skb, ch_sw_tm_ie); |
| 1386 | if (!ret) |
| 1387 | set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); |
| 1388 | |
| 1389 | out: |
| 1390 | mutex_unlock(&local->sta_mtx); |
| 1391 | dev_kfree_skb_any(skb); |
| 1392 | return ret; |
| 1393 | } |
| 1394 | |
| 1395 | void |
| 1396 | ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy, |
| 1397 | struct net_device *dev, |
| 1398 | const u8 *addr) |
| 1399 | { |
| 1400 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1401 | struct ieee80211_local *local = sdata->local; |
| 1402 | struct sta_info *sta; |
| 1403 | |
| 1404 | mutex_lock(&local->sta_mtx); |
| 1405 | sta = sta_info_get(sdata, addr); |
| 1406 | if (!sta) { |
| 1407 | tdls_dbg(sdata, |
| 1408 | "Invalid TDLS peer %pM for channel switch cancel\n", |
| 1409 | addr); |
| 1410 | goto out; |
| 1411 | } |
| 1412 | |
| 1413 | if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { |
| 1414 | tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n", |
| 1415 | addr); |
| 1416 | goto out; |
| 1417 | } |
| 1418 | |
| 1419 | drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); |
| 1420 | clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); |
| 1421 | |
| 1422 | out: |
| 1423 | mutex_unlock(&local->sta_mtx); |
| 1424 | } |
Arik Nemtsov | 8a4d32f | 2014-11-09 18:50:20 +0200 | [diff] [blame] | 1425 | |
| 1426 | static struct sk_buff * |
| 1427 | ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta, |
| 1428 | u32 *ch_sw_tm_ie_offset) |
| 1429 | { |
| 1430 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
| 1431 | struct sk_buff *skb; |
| 1432 | u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)]; |
| 1433 | |
| 1434 | /* initial timing are always zero in the template */ |
| 1435 | iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0); |
| 1436 | |
| 1437 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, |
| 1438 | WLAN_TDLS_CHANNEL_SWITCH_RESPONSE, |
| 1439 | 0, 0, !sta->sta.tdls_initiator, |
| 1440 | extra_ies, sizeof(extra_ies), 0, NULL); |
| 1441 | if (!skb) |
| 1442 | return NULL; |
| 1443 | |
| 1444 | skb = ieee80211_build_data_template(sdata, skb, 0); |
| 1445 | if (IS_ERR(skb)) { |
| 1446 | tdls_dbg(sdata, |
| 1447 | "Failed building TDLS channel switch resp frame\n"); |
| 1448 | return NULL; |
| 1449 | } |
| 1450 | |
| 1451 | if (ch_sw_tm_ie_offset) { |
| 1452 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); |
| 1453 | |
| 1454 | if (!tm_ie) { |
| 1455 | tdls_dbg(sdata, |
| 1456 | "No switch timing IE in TDLS switch resp\n"); |
| 1457 | dev_kfree_skb_any(skb); |
| 1458 | return NULL; |
| 1459 | } |
| 1460 | |
| 1461 | *ch_sw_tm_ie_offset = tm_ie - skb->data; |
| 1462 | } |
| 1463 | |
| 1464 | tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n", |
| 1465 | sta->sta.addr); |
| 1466 | return skb; |
| 1467 | } |
| 1468 | |
| 1469 | static int |
| 1470 | ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, |
| 1471 | struct sk_buff *skb) |
| 1472 | { |
| 1473 | struct ieee80211_local *local = sdata->local; |
| 1474 | struct ieee802_11_elems elems; |
| 1475 | struct sta_info *sta; |
| 1476 | struct ieee80211_tdls_data *tf = (void *)skb->data; |
| 1477 | bool local_initiator; |
| 1478 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); |
| 1479 | int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable); |
| 1480 | struct ieee80211_tdls_ch_sw_params params = {}; |
| 1481 | int ret; |
| 1482 | |
| 1483 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; |
| 1484 | params.timestamp = rx_status->device_timestamp; |
| 1485 | |
| 1486 | if (skb->len < baselen) { |
| 1487 | tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n", |
| 1488 | skb->len); |
| 1489 | return -EINVAL; |
| 1490 | } |
| 1491 | |
| 1492 | mutex_lock(&local->sta_mtx); |
| 1493 | sta = sta_info_get(sdata, tf->sa); |
| 1494 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { |
| 1495 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", |
| 1496 | tf->sa); |
| 1497 | ret = -EINVAL; |
| 1498 | goto out; |
| 1499 | } |
| 1500 | |
| 1501 | params.sta = &sta->sta; |
| 1502 | params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code); |
| 1503 | if (params.status != 0) { |
| 1504 | ret = 0; |
| 1505 | goto call_drv; |
| 1506 | } |
| 1507 | |
| 1508 | ieee802_11_parse_elems(tf->u.chan_switch_resp.variable, |
| 1509 | skb->len - baselen, false, &elems); |
| 1510 | if (elems.parse_error) { |
| 1511 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n"); |
| 1512 | ret = -EINVAL; |
| 1513 | goto out; |
| 1514 | } |
| 1515 | |
| 1516 | if (!elems.ch_sw_timing || !elems.lnk_id) { |
| 1517 | tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n"); |
| 1518 | ret = -EINVAL; |
| 1519 | goto out; |
| 1520 | } |
| 1521 | |
| 1522 | /* validate the initiator is set correctly */ |
| 1523 | local_initiator = |
| 1524 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); |
| 1525 | if (local_initiator == sta->sta.tdls_initiator) { |
| 1526 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); |
| 1527 | ret = -EINVAL; |
| 1528 | goto out; |
| 1529 | } |
| 1530 | |
| 1531 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); |
| 1532 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); |
| 1533 | |
| 1534 | params.tmpl_skb = |
| 1535 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, ¶ms.ch_sw_tm_ie); |
| 1536 | if (!params.tmpl_skb) { |
| 1537 | ret = -ENOENT; |
| 1538 | goto out; |
| 1539 | } |
| 1540 | |
| 1541 | call_drv: |
| 1542 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); |
| 1543 | |
| 1544 | tdls_dbg(sdata, |
| 1545 | "TDLS channel switch response received from %pM status %d\n", |
| 1546 | tf->sa, params.status); |
| 1547 | |
| 1548 | out: |
| 1549 | mutex_unlock(&local->sta_mtx); |
| 1550 | dev_kfree_skb_any(params.tmpl_skb); |
| 1551 | return ret; |
| 1552 | } |
| 1553 | |
| 1554 | static int |
| 1555 | ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, |
| 1556 | struct sk_buff *skb) |
| 1557 | { |
| 1558 | struct ieee80211_local *local = sdata->local; |
| 1559 | struct ieee802_11_elems elems; |
| 1560 | struct cfg80211_chan_def chandef; |
| 1561 | struct ieee80211_channel *chan; |
| 1562 | enum nl80211_channel_type chan_type; |
| 1563 | int freq; |
| 1564 | u8 target_channel, oper_class; |
| 1565 | bool local_initiator; |
| 1566 | struct sta_info *sta; |
| 1567 | enum ieee80211_band band; |
| 1568 | struct ieee80211_tdls_data *tf = (void *)skb->data; |
| 1569 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); |
| 1570 | int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable); |
| 1571 | struct ieee80211_tdls_ch_sw_params params = {}; |
| 1572 | int ret = 0; |
| 1573 | |
| 1574 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; |
| 1575 | params.timestamp = rx_status->device_timestamp; |
| 1576 | |
| 1577 | if (skb->len < baselen) { |
| 1578 | tdls_dbg(sdata, "TDLS channel switch req too short: %d\n", |
| 1579 | skb->len); |
| 1580 | return -EINVAL; |
| 1581 | } |
| 1582 | |
| 1583 | target_channel = tf->u.chan_switch_req.target_channel; |
| 1584 | oper_class = tf->u.chan_switch_req.oper_class; |
| 1585 | |
| 1586 | /* |
| 1587 | * We can't easily infer the channel band. The operating class is |
| 1588 | * ambiguous - there are multiple tables (US/Europe/JP/Global). The |
| 1589 | * solution here is to treat channels with number >14 as 5GHz ones, |
| 1590 | * and specifically check for the (oper_class, channel) combinations |
| 1591 | * where this doesn't hold. These are thankfully unique according to |
| 1592 | * IEEE802.11-2012. |
| 1593 | * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as |
| 1594 | * valid here. |
| 1595 | */ |
| 1596 | if ((oper_class == 112 || oper_class == 2 || oper_class == 3 || |
| 1597 | oper_class == 4 || oper_class == 5 || oper_class == 6) && |
| 1598 | target_channel < 14) |
| 1599 | band = IEEE80211_BAND_5GHZ; |
| 1600 | else |
| 1601 | band = target_channel < 14 ? IEEE80211_BAND_2GHZ : |
| 1602 | IEEE80211_BAND_5GHZ; |
| 1603 | |
| 1604 | freq = ieee80211_channel_to_frequency(target_channel, band); |
| 1605 | if (freq == 0) { |
| 1606 | tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n", |
| 1607 | target_channel); |
| 1608 | return -EINVAL; |
| 1609 | } |
| 1610 | |
| 1611 | chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); |
| 1612 | if (!chan) { |
| 1613 | tdls_dbg(sdata, |
| 1614 | "Unsupported channel for TDLS chan switch: %d\n", |
| 1615 | target_channel); |
| 1616 | return -EINVAL; |
| 1617 | } |
| 1618 | |
| 1619 | ieee802_11_parse_elems(tf->u.chan_switch_req.variable, |
| 1620 | skb->len - baselen, false, &elems); |
| 1621 | if (elems.parse_error) { |
| 1622 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n"); |
| 1623 | return -EINVAL; |
| 1624 | } |
| 1625 | |
| 1626 | if (!elems.ch_sw_timing || !elems.lnk_id) { |
| 1627 | tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n"); |
| 1628 | return -EINVAL; |
| 1629 | } |
| 1630 | |
| 1631 | mutex_lock(&local->sta_mtx); |
| 1632 | sta = sta_info_get(sdata, tf->sa); |
| 1633 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { |
| 1634 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", |
| 1635 | tf->sa); |
| 1636 | ret = -EINVAL; |
| 1637 | goto out; |
| 1638 | } |
| 1639 | |
| 1640 | params.sta = &sta->sta; |
| 1641 | |
| 1642 | /* validate the initiator is set correctly */ |
| 1643 | local_initiator = |
| 1644 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); |
| 1645 | if (local_initiator == sta->sta.tdls_initiator) { |
| 1646 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); |
| 1647 | ret = -EINVAL; |
| 1648 | goto out; |
| 1649 | } |
| 1650 | |
| 1651 | if (!sta->sta.ht_cap.ht_supported) { |
| 1652 | chan_type = NL80211_CHAN_NO_HT; |
| 1653 | } else if (!elems.sec_chan_offs) { |
| 1654 | chan_type = NL80211_CHAN_HT20; |
| 1655 | } else { |
| 1656 | switch (elems.sec_chan_offs->sec_chan_offs) { |
| 1657 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: |
| 1658 | chan_type = NL80211_CHAN_HT40PLUS; |
| 1659 | break; |
| 1660 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: |
| 1661 | chan_type = NL80211_CHAN_HT40MINUS; |
| 1662 | break; |
| 1663 | default: |
| 1664 | chan_type = NL80211_CHAN_HT20; |
| 1665 | break; |
| 1666 | } |
| 1667 | } |
| 1668 | |
| 1669 | cfg80211_chandef_create(&chandef, chan, chan_type); |
| 1670 | params.chandef = &chandef; |
| 1671 | |
| 1672 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); |
| 1673 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); |
| 1674 | |
| 1675 | params.tmpl_skb = |
| 1676 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, |
| 1677 | ¶ms.ch_sw_tm_ie); |
| 1678 | if (!params.tmpl_skb) { |
| 1679 | ret = -ENOENT; |
| 1680 | goto out; |
| 1681 | } |
| 1682 | |
| 1683 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); |
| 1684 | |
| 1685 | tdls_dbg(sdata, |
| 1686 | "TDLS ch switch request received from %pM ch %d width %d\n", |
| 1687 | tf->sa, params.chandef->chan->center_freq, |
| 1688 | params.chandef->width); |
| 1689 | out: |
| 1690 | mutex_unlock(&local->sta_mtx); |
| 1691 | dev_kfree_skb_any(params.tmpl_skb); |
| 1692 | return ret; |
| 1693 | } |
| 1694 | |
| 1695 | void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata, |
| 1696 | struct sk_buff *skb) |
| 1697 | { |
| 1698 | struct ieee80211_tdls_data *tf = (void *)skb->data; |
| 1699 | struct wiphy *wiphy = sdata->local->hw.wiphy; |
| 1700 | |
| 1701 | /* make sure the driver supports it */ |
| 1702 | if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH)) |
| 1703 | return; |
| 1704 | |
| 1705 | /* we want to access the entire packet */ |
| 1706 | if (skb_linearize(skb)) |
| 1707 | return; |
| 1708 | /* |
| 1709 | * The packet/size was already validated by mac80211 Rx path, only look |
| 1710 | * at the action type. |
| 1711 | */ |
| 1712 | switch (tf->action_code) { |
| 1713 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
| 1714 | ieee80211_process_tdls_channel_switch_req(sdata, skb); |
| 1715 | break; |
| 1716 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
| 1717 | ieee80211_process_tdls_channel_switch_resp(sdata, skb); |
| 1718 | break; |
| 1719 | default: |
| 1720 | WARN_ON_ONCE(1); |
| 1721 | return; |
| 1722 | } |
| 1723 | } |