1 /* 2 * hostapd - WNM 3 * Copyright (c) 2011-2014, Qualcomm Atheros, Inc. 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "utils/eloop.h" 13 #include "common/ieee802_11_defs.h" 14 #include "common/wpa_ctrl.h" 15 #include "ap/hostapd.h" 16 #include "ap/sta_info.h" 17 #include "ap/ap_config.h" 18 #include "ap/ap_drv_ops.h" 19 #include "ap/wpa_auth.h" 20 #include "wnm_ap.h" 21 22 #define MAX_TFS_IE_LEN 1024 23 24 25 /* get the TFS IE from driver */ 26 static int ieee80211_11_get_tfs_ie(struct hostapd_data *hapd, const u8 *addr, 27 u8 *buf, u16 *buf_len, enum wnm_oper oper) 28 { 29 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper); 30 31 return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len); 32 } 33 34 35 /* set the TFS IE to driver */ 36 static int ieee80211_11_set_tfs_ie(struct hostapd_data *hapd, const u8 *addr, 37 u8 *buf, u16 *buf_len, enum wnm_oper oper) 38 { 39 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper); 40 41 return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len); 42 } 43 44 45 /* MLME-SLEEPMODE.response */ 46 static int ieee802_11_send_wnmsleep_resp(struct hostapd_data *hapd, 47 const u8 *addr, u8 dialog_token, 48 u8 action_type, u16 intval) 49 { 50 struct ieee80211_mgmt *mgmt; 51 int res; 52 size_t len; 53 size_t gtk_elem_len = 0; 54 size_t igtk_elem_len = 0; 55 struct wnm_sleep_element wnmsleep_ie; 56 u8 *wnmtfs_ie; 57 u8 wnmsleep_ie_len; 58 u16 wnmtfs_ie_len; 59 u8 *pos; 60 struct sta_info *sta; 61 enum wnm_oper tfs_oper = action_type == WNM_SLEEP_MODE_ENTER ? 62 WNM_SLEEP_TFS_RESP_IE_ADD : WNM_SLEEP_TFS_RESP_IE_NONE; 63 64 sta = ap_get_sta(hapd, addr); 65 if (sta == NULL) { 66 wpa_printf(MSG_DEBUG, "%s: station not found", __func__); 67 return -EINVAL; 68 } 69 70 /* WNM-Sleep Mode IE */ 71 os_memset(&wnmsleep_ie, 0, sizeof(struct wnm_sleep_element)); 72 wnmsleep_ie_len = sizeof(struct wnm_sleep_element); 73 wnmsleep_ie.eid = WLAN_EID_WNMSLEEP; 74 wnmsleep_ie.len = wnmsleep_ie_len - 2; 75 wnmsleep_ie.action_type = action_type; 76 wnmsleep_ie.status = WNM_STATUS_SLEEP_ACCEPT; 77 wnmsleep_ie.intval = host_to_le16(intval); 78 79 /* TFS IE(s) */ 80 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN); 81 if (wnmtfs_ie == NULL) 82 return -1; 83 if (ieee80211_11_get_tfs_ie(hapd, addr, wnmtfs_ie, &wnmtfs_ie_len, 84 tfs_oper)) { 85 wnmtfs_ie_len = 0; 86 os_free(wnmtfs_ie); 87 wnmtfs_ie = NULL; 88 } 89 90 #define MAX_GTK_SUBELEM_LEN 45 91 #define MAX_IGTK_SUBELEM_LEN 26 92 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + 93 MAX_GTK_SUBELEM_LEN + MAX_IGTK_SUBELEM_LEN); 94 if (mgmt == NULL) { 95 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for " 96 "WNM-Sleep Response action frame"); 97 return -1; 98 } 99 os_memcpy(mgmt->da, addr, ETH_ALEN); 100 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 101 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 102 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 103 WLAN_FC_STYPE_ACTION); 104 mgmt->u.action.category = WLAN_ACTION_WNM; 105 mgmt->u.action.u.wnm_sleep_resp.action = WNM_SLEEP_MODE_RESP; 106 mgmt->u.action.u.wnm_sleep_resp.dialogtoken = dialog_token; 107 pos = (u8 *)mgmt->u.action.u.wnm_sleep_resp.variable; 108 /* add key data if MFP is enabled */ 109 if (!wpa_auth_uses_mfp(sta->wpa_sm) || 110 action_type != WNM_SLEEP_MODE_EXIT) { 111 mgmt->u.action.u.wnm_sleep_resp.keydata_len = 0; 112 } else { 113 gtk_elem_len = wpa_wnmsleep_gtk_subelem(sta->wpa_sm, pos); 114 pos += gtk_elem_len; 115 wpa_printf(MSG_DEBUG, "Pass 4, gtk_len = %d", 116 (int) gtk_elem_len); 117 #ifdef CONFIG_IEEE80211W 118 res = wpa_wnmsleep_igtk_subelem(sta->wpa_sm, pos); 119 if (res < 0) { 120 os_free(wnmtfs_ie); 121 os_free(mgmt); 122 return -1; 123 } 124 igtk_elem_len = res; 125 pos += igtk_elem_len; 126 wpa_printf(MSG_DEBUG, "Pass 4 igtk_len = %d", 127 (int) igtk_elem_len); 128 #endif /* CONFIG_IEEE80211W */ 129 130 WPA_PUT_LE16((u8 *) 131 &mgmt->u.action.u.wnm_sleep_resp.keydata_len, 132 gtk_elem_len + igtk_elem_len); 133 } 134 os_memcpy(pos, &wnmsleep_ie, wnmsleep_ie_len); 135 /* copy TFS IE here */ 136 pos += wnmsleep_ie_len; 137 if (wnmtfs_ie) 138 os_memcpy(pos, wnmtfs_ie, wnmtfs_ie_len); 139 140 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_resp) + gtk_elem_len + 141 igtk_elem_len + wnmsleep_ie_len + wnmtfs_ie_len; 142 143 /* In driver, response frame should be forced to sent when STA is in 144 * PS mode */ 145 res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0, 146 mgmt->da, &mgmt->u.action.category, len); 147 148 if (!res) { 149 wpa_printf(MSG_DEBUG, "Successfully send WNM-Sleep Response " 150 "frame"); 151 152 /* when entering wnmsleep 153 * 1. pause the node in driver 154 * 2. mark the node so that AP won't update GTK/IGTK during 155 * WNM Sleep 156 */ 157 if (wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT && 158 wnmsleep_ie.action_type == WNM_SLEEP_MODE_ENTER) { 159 sta->flags |= WLAN_STA_WNM_SLEEP_MODE; 160 hostapd_drv_wnm_oper(hapd, WNM_SLEEP_ENTER_CONFIRM, 161 addr, NULL, NULL); 162 wpa_set_wnmsleep(sta->wpa_sm, 1); 163 } 164 /* when exiting wnmsleep 165 * 1. unmark the node 166 * 2. start GTK/IGTK update if MFP is not used 167 * 3. unpause the node in driver 168 */ 169 if ((wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT || 170 wnmsleep_ie.status == 171 WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) && 172 wnmsleep_ie.action_type == WNM_SLEEP_MODE_EXIT) { 173 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE; 174 wpa_set_wnmsleep(sta->wpa_sm, 0); 175 hostapd_drv_wnm_oper(hapd, WNM_SLEEP_EXIT_CONFIRM, 176 addr, NULL, NULL); 177 if (!wpa_auth_uses_mfp(sta->wpa_sm)) 178 wpa_wnmsleep_rekey_gtk(sta->wpa_sm); 179 } 180 } else 181 wpa_printf(MSG_DEBUG, "Fail to send WNM-Sleep Response frame"); 182 183 #undef MAX_GTK_SUBELEM_LEN 184 #undef MAX_IGTK_SUBELEM_LEN 185 os_free(wnmtfs_ie); 186 os_free(mgmt); 187 return res; 188 } 189 190 191 static void ieee802_11_rx_wnmsleep_req(struct hostapd_data *hapd, 192 const u8 *addr, const u8 *frm, int len) 193 { 194 /* Dialog Token [1] | WNM-Sleep Mode IE | TFS Response IE */ 195 const u8 *pos = frm; 196 u8 dialog_token; 197 struct wnm_sleep_element *wnmsleep_ie = NULL; 198 /* multiple TFS Req IE (assuming consecutive) */ 199 u8 *tfsreq_ie_start = NULL; 200 u8 *tfsreq_ie_end = NULL; 201 u16 tfsreq_ie_len = 0; 202 203 dialog_token = *pos++; 204 while (pos + 1 < frm + len) { 205 u8 ie_len = pos[1]; 206 if (pos + 2 + ie_len > frm + len) 207 break; 208 if (*pos == WLAN_EID_WNMSLEEP) 209 wnmsleep_ie = (struct wnm_sleep_element *) pos; 210 else if (*pos == WLAN_EID_TFS_REQ) { 211 if (!tfsreq_ie_start) 212 tfsreq_ie_start = (u8 *) pos; 213 tfsreq_ie_end = (u8 *) pos; 214 } else 215 wpa_printf(MSG_DEBUG, "WNM: EID %d not recognized", 216 *pos); 217 pos += ie_len + 2; 218 } 219 220 if (!wnmsleep_ie) { 221 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found"); 222 return; 223 } 224 225 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER && 226 tfsreq_ie_start && tfsreq_ie_end && 227 tfsreq_ie_end - tfsreq_ie_start >= 0) { 228 tfsreq_ie_len = (tfsreq_ie_end + tfsreq_ie_end[1] + 2) - 229 tfsreq_ie_start; 230 wpa_printf(MSG_DEBUG, "TFS Req IE(s) found"); 231 /* pass the TFS Req IE(s) to driver for processing */ 232 if (ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start, 233 &tfsreq_ie_len, 234 WNM_SLEEP_TFS_REQ_IE_SET)) 235 wpa_printf(MSG_DEBUG, "Fail to set TFS Req IE"); 236 } 237 238 ieee802_11_send_wnmsleep_resp(hapd, addr, dialog_token, 239 wnmsleep_ie->action_type, 240 le_to_host16(wnmsleep_ie->intval)); 241 242 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) { 243 /* clear the tfs after sending the resp frame */ 244 ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start, 245 &tfsreq_ie_len, WNM_SLEEP_TFS_IE_DEL); 246 } 247 } 248 249 250 static int ieee802_11_send_bss_trans_mgmt_request(struct hostapd_data *hapd, 251 const u8 *addr, 252 u8 dialog_token, 253 const char *url) 254 { 255 struct ieee80211_mgmt *mgmt; 256 size_t url_len, len; 257 u8 *pos; 258 int res; 259 260 if (url) 261 url_len = os_strlen(url); 262 else 263 url_len = 0; 264 265 mgmt = os_zalloc(sizeof(*mgmt) + (url_len ? 1 + url_len : 0)); 266 if (mgmt == NULL) 267 return -1; 268 os_memcpy(mgmt->da, addr, ETH_ALEN); 269 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 270 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 271 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 272 WLAN_FC_STYPE_ACTION); 273 mgmt->u.action.category = WLAN_ACTION_WNM; 274 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 275 mgmt->u.action.u.bss_tm_req.dialog_token = dialog_token; 276 mgmt->u.action.u.bss_tm_req.req_mode = 0; 277 mgmt->u.action.u.bss_tm_req.disassoc_timer = host_to_le16(0); 278 mgmt->u.action.u.bss_tm_req.validity_interval = 1; 279 pos = mgmt->u.action.u.bss_tm_req.variable; 280 if (url) { 281 *pos++ += url_len; 282 os_memcpy(pos, url, url_len); 283 pos += url_len; 284 } 285 286 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to " 287 MACSTR " dialog_token=%u req_mode=0x%x disassoc_timer=%u " 288 "validity_interval=%u", 289 MAC2STR(addr), dialog_token, 290 mgmt->u.action.u.bss_tm_req.req_mode, 291 le_to_host16(mgmt->u.action.u.bss_tm_req.disassoc_timer), 292 mgmt->u.action.u.bss_tm_req.validity_interval); 293 294 len = pos - &mgmt->u.action.category; 295 res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0, 296 mgmt->da, &mgmt->u.action.category, len); 297 os_free(mgmt); 298 return res; 299 } 300 301 302 static void ieee802_11_rx_bss_trans_mgmt_query(struct hostapd_data *hapd, 303 const u8 *addr, const u8 *frm, 304 size_t len) 305 { 306 u8 dialog_token, reason; 307 const u8 *pos, *end; 308 309 if (len < 2) { 310 wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Query from " 311 MACSTR, MAC2STR(addr)); 312 return; 313 } 314 315 pos = frm; 316 end = pos + len; 317 dialog_token = *pos++; 318 reason = *pos++; 319 320 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Query from " 321 MACSTR " dialog_token=%u reason=%u", 322 MAC2STR(addr), dialog_token, reason); 323 324 wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries", 325 pos, end - pos); 326 327 ieee802_11_send_bss_trans_mgmt_request(hapd, addr, dialog_token, NULL); 328 } 329 330 331 static void ieee802_11_rx_bss_trans_mgmt_resp(struct hostapd_data *hapd, 332 const u8 *addr, const u8 *frm, 333 size_t len) 334 { 335 u8 dialog_token, status_code, bss_termination_delay; 336 const u8 *pos, *end; 337 338 if (len < 3) { 339 wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Response from " 340 MACSTR, MAC2STR(addr)); 341 return; 342 } 343 344 pos = frm; 345 end = pos + len; 346 dialog_token = *pos++; 347 status_code = *pos++; 348 bss_termination_delay = *pos++; 349 350 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Response from " 351 MACSTR " dialog_token=%u status_code=%u " 352 "bss_termination_delay=%u", MAC2STR(addr), dialog_token, 353 status_code, bss_termination_delay); 354 355 if (status_code == WNM_BSS_TM_ACCEPT) { 356 if (end - pos < ETH_ALEN) { 357 wpa_printf(MSG_DEBUG, "WNM: not enough room for Target BSSID field"); 358 return; 359 } 360 wpa_printf(MSG_DEBUG, "WNM: Target BSSID: " MACSTR, 361 MAC2STR(pos)); 362 wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR 363 " status_code=%u bss_termination_delay=%u target_bssid=" 364 MACSTR, 365 MAC2STR(addr), status_code, bss_termination_delay, 366 MAC2STR(pos)); 367 pos += ETH_ALEN; 368 } else { 369 wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR 370 " status_code=%u bss_termination_delay=%u", 371 MAC2STR(addr), status_code, bss_termination_delay); 372 } 373 374 wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries", 375 pos, end - pos); 376 } 377 378 379 int ieee802_11_rx_wnm_action_ap(struct hostapd_data *hapd, 380 const struct ieee80211_mgmt *mgmt, size_t len) 381 { 382 u8 action; 383 const u8 *payload; 384 size_t plen; 385 386 if (len < IEEE80211_HDRLEN + 2) 387 return -1; 388 389 payload = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1; 390 action = *payload++; 391 plen = len - IEEE80211_HDRLEN - 2; 392 393 switch (action) { 394 case WNM_BSS_TRANS_MGMT_QUERY: 395 ieee802_11_rx_bss_trans_mgmt_query(hapd, mgmt->sa, payload, 396 plen); 397 return 0; 398 case WNM_BSS_TRANS_MGMT_RESP: 399 ieee802_11_rx_bss_trans_mgmt_resp(hapd, mgmt->sa, payload, 400 plen); 401 return 0; 402 case WNM_SLEEP_MODE_REQ: 403 ieee802_11_rx_wnmsleep_req(hapd, mgmt->sa, payload, plen); 404 return 0; 405 } 406 407 wpa_printf(MSG_DEBUG, "WNM: Unsupported WNM Action %u from " MACSTR, 408 action, MAC2STR(mgmt->sa)); 409 return -1; 410 } 411 412 413 int wnm_send_disassoc_imminent(struct hostapd_data *hapd, 414 struct sta_info *sta, int disassoc_timer) 415 { 416 u8 buf[1000], *pos; 417 struct ieee80211_mgmt *mgmt; 418 419 os_memset(buf, 0, sizeof(buf)); 420 mgmt = (struct ieee80211_mgmt *) buf; 421 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 422 WLAN_FC_STYPE_ACTION); 423 os_memcpy(mgmt->da, sta->addr, ETH_ALEN); 424 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 425 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 426 mgmt->u.action.category = WLAN_ACTION_WNM; 427 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 428 mgmt->u.action.u.bss_tm_req.dialog_token = 1; 429 mgmt->u.action.u.bss_tm_req.req_mode = 430 WNM_BSS_TM_REQ_DISASSOC_IMMINENT; 431 mgmt->u.action.u.bss_tm_req.disassoc_timer = 432 host_to_le16(disassoc_timer); 433 mgmt->u.action.u.bss_tm_req.validity_interval = 0; 434 435 pos = mgmt->u.action.u.bss_tm_req.variable; 436 437 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request frame to indicate imminent disassociation (disassoc_timer=%d) to " 438 MACSTR, disassoc_timer, MAC2STR(sta->addr)); 439 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) { 440 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition " 441 "Management Request frame"); 442 return -1; 443 } 444 445 return 0; 446 } 447 448 449 static void set_disassoc_timer(struct hostapd_data *hapd, struct sta_info *sta, 450 int disassoc_timer) 451 { 452 int timeout, beacon_int; 453 454 /* 455 * Prevent STA from reconnecting using cached PMKSA to force 456 * full authentication with the authentication server (which may 457 * decide to reject the connection), 458 */ 459 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 460 461 beacon_int = hapd->iconf->beacon_int; 462 if (beacon_int < 1) 463 beacon_int = 100; /* best guess */ 464 /* Calculate timeout in ms based on beacon_int in TU */ 465 timeout = disassoc_timer * beacon_int * 128 / 125; 466 wpa_printf(MSG_DEBUG, "Disassociation timer for " MACSTR 467 " set to %d ms", MAC2STR(sta->addr), timeout); 468 469 sta->timeout_next = STA_DISASSOC_FROM_CLI; 470 eloop_cancel_timeout(ap_handle_timer, hapd, sta); 471 eloop_register_timeout(timeout / 1000, 472 timeout % 1000 * 1000, 473 ap_handle_timer, hapd, sta); 474 } 475 476 477 int wnm_send_ess_disassoc_imminent(struct hostapd_data *hapd, 478 struct sta_info *sta, const char *url, 479 int disassoc_timer) 480 { 481 u8 buf[1000], *pos; 482 struct ieee80211_mgmt *mgmt; 483 size_t url_len; 484 485 os_memset(buf, 0, sizeof(buf)); 486 mgmt = (struct ieee80211_mgmt *) buf; 487 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 488 WLAN_FC_STYPE_ACTION); 489 os_memcpy(mgmt->da, sta->addr, ETH_ALEN); 490 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 491 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 492 mgmt->u.action.category = WLAN_ACTION_WNM; 493 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 494 mgmt->u.action.u.bss_tm_req.dialog_token = 1; 495 mgmt->u.action.u.bss_tm_req.req_mode = 496 WNM_BSS_TM_REQ_DISASSOC_IMMINENT | 497 WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT; 498 mgmt->u.action.u.bss_tm_req.disassoc_timer = 499 host_to_le16(disassoc_timer); 500 mgmt->u.action.u.bss_tm_req.validity_interval = 0x01; 501 502 pos = mgmt->u.action.u.bss_tm_req.variable; 503 504 /* Session Information URL */ 505 url_len = os_strlen(url); 506 if (url_len > 255) 507 return -1; 508 *pos++ = url_len; 509 os_memcpy(pos, url, url_len); 510 pos += url_len; 511 512 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) { 513 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition " 514 "Management Request frame"); 515 return -1; 516 } 517 518 if (disassoc_timer) { 519 /* send disassociation frame after time-out */ 520 set_disassoc_timer(hapd, sta, disassoc_timer); 521 } 522 523 return 0; 524 } 525 526 527 int wnm_send_bss_tm_req(struct hostapd_data *hapd, struct sta_info *sta, 528 u8 req_mode, int disassoc_timer, u8 valid_int, 529 const u8 *bss_term_dur, const char *url, 530 const u8 *nei_rep, size_t nei_rep_len) 531 { 532 u8 *buf, *pos; 533 struct ieee80211_mgmt *mgmt; 534 size_t url_len; 535 536 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to " 537 MACSTR " req_mode=0x%x disassoc_timer=%d valid_int=0x%x", 538 MAC2STR(sta->addr), req_mode, disassoc_timer, valid_int); 539 buf = os_zalloc(1000 + nei_rep_len); 540 if (buf == NULL) 541 return -1; 542 mgmt = (struct ieee80211_mgmt *) buf; 543 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 544 WLAN_FC_STYPE_ACTION); 545 os_memcpy(mgmt->da, sta->addr, ETH_ALEN); 546 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 547 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 548 mgmt->u.action.category = WLAN_ACTION_WNM; 549 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 550 mgmt->u.action.u.bss_tm_req.dialog_token = 1; 551 mgmt->u.action.u.bss_tm_req.req_mode = req_mode; 552 mgmt->u.action.u.bss_tm_req.disassoc_timer = 553 host_to_le16(disassoc_timer); 554 mgmt->u.action.u.bss_tm_req.validity_interval = valid_int; 555 556 pos = mgmt->u.action.u.bss_tm_req.variable; 557 558 if ((req_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) && 559 bss_term_dur) { 560 os_memcpy(pos, bss_term_dur, 12); 561 pos += 12; 562 } 563 564 if (url) { 565 /* Session Information URL */ 566 url_len = os_strlen(url); 567 if (url_len > 255) { 568 os_free(buf); 569 return -1; 570 } 571 572 *pos++ = url_len; 573 os_memcpy(pos, url, url_len); 574 pos += url_len; 575 } 576 577 if (nei_rep) { 578 os_memcpy(pos, nei_rep, nei_rep_len); 579 pos += nei_rep_len; 580 } 581 582 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) { 583 wpa_printf(MSG_DEBUG, 584 "Failed to send BSS Transition Management Request frame"); 585 os_free(buf); 586 return -1; 587 } 588 os_free(buf); 589 590 if (disassoc_timer) { 591 /* send disassociation frame after time-out */ 592 set_disassoc_timer(hapd, sta, disassoc_timer); 593 } 594 595 return 0; 596 } 597