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 "mbo_ap.h" 21#include "wnm_ap.h" 22 23#define MAX_TFS_IE_LEN 1024 24 25 26/* get the TFS IE from driver */ 27static int ieee80211_11_get_tfs_ie(struct hostapd_data *hapd, const u8 *addr, 28 u8 *buf, u16 *buf_len, enum wnm_oper oper) 29{ 30 wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper); 31 32 return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len); 33} 34 35 36/* set the TFS IE to driver */ 37static int ieee80211_11_set_tfs_ie(struct hostapd_data *hapd, const u8 *addr, 38 u8 *buf, u16 *buf_len, enum wnm_oper oper) 39{ 40 wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper); 41 42 return hostapd_drv_wnm_oper(hapd, oper, addr, buf, buf_len); 43} 44 45 46/* MLME-SLEEPMODE.response */ 47static int ieee802_11_send_wnmsleep_resp(struct hostapd_data *hapd, 48 const u8 *addr, u8 dialog_token, 49 u8 action_type, u16 intval) 50{ 51 struct ieee80211_mgmt *mgmt; 52 int res; 53 size_t len; 54 size_t gtk_elem_len = 0; 55 size_t igtk_elem_len = 0; 56 struct wnm_sleep_element wnmsleep_ie; 57 u8 *wnmtfs_ie; 58 u8 wnmsleep_ie_len; 59 u16 wnmtfs_ie_len; 60 u8 *pos; 61 struct sta_info *sta; 62 enum wnm_oper tfs_oper = action_type == WNM_SLEEP_MODE_ENTER ? 63 WNM_SLEEP_TFS_RESP_IE_ADD : WNM_SLEEP_TFS_RESP_IE_NONE; 64 65 sta = ap_get_sta(hapd, addr); 66 if (sta == NULL) { 67 wpa_printf(MSG_DEBUG, "%s: station not found", __func__); 68 return -EINVAL; 69 } 70 71 /* WNM-Sleep Mode IE */ 72 os_memset(&wnmsleep_ie, 0, sizeof(struct wnm_sleep_element)); 73 wnmsleep_ie_len = sizeof(struct wnm_sleep_element); 74 wnmsleep_ie.eid = WLAN_EID_WNMSLEEP; 75 wnmsleep_ie.len = wnmsleep_ie_len - 2; 76 wnmsleep_ie.action_type = action_type; 77 wnmsleep_ie.status = WNM_STATUS_SLEEP_ACCEPT; 78 wnmsleep_ie.intval = host_to_le16(intval); 79 80 /* TFS IE(s) */ 81 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN); 82 if (wnmtfs_ie == NULL) 83 return -1; 84 if (ieee80211_11_get_tfs_ie(hapd, addr, wnmtfs_ie, &wnmtfs_ie_len, 85 tfs_oper)) { 86 wnmtfs_ie_len = 0; 87 os_free(wnmtfs_ie); 88 wnmtfs_ie = NULL; 89 } 90 91#define MAX_GTK_SUBELEM_LEN 45 92#define MAX_IGTK_SUBELEM_LEN 26 93 mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + 94 MAX_GTK_SUBELEM_LEN + MAX_IGTK_SUBELEM_LEN); 95 if (mgmt == NULL) { 96 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for " 97 "WNM-Sleep Response action frame"); 98 res = -1; 99 goto fail; 100 } 101 os_memcpy(mgmt->da, addr, ETH_ALEN); 102 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 103 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 104 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 105 WLAN_FC_STYPE_ACTION); 106 mgmt->u.action.category = WLAN_ACTION_WNM; 107 mgmt->u.action.u.wnm_sleep_resp.action = WNM_SLEEP_MODE_RESP; 108 mgmt->u.action.u.wnm_sleep_resp.dialogtoken = dialog_token; 109 pos = (u8 *)mgmt->u.action.u.wnm_sleep_resp.variable; 110 /* add key data if MFP is enabled */ 111 if (!wpa_auth_uses_mfp(sta->wpa_sm) || 112 action_type != WNM_SLEEP_MODE_EXIT) { 113 mgmt->u.action.u.wnm_sleep_resp.keydata_len = 0; 114 } else { 115 gtk_elem_len = wpa_wnmsleep_gtk_subelem(sta->wpa_sm, pos); 116 pos += gtk_elem_len; 117 wpa_printf(MSG_DEBUG, "Pass 4, gtk_len = %d", 118 (int) gtk_elem_len); 119#ifdef CONFIG_IEEE80211W 120 res = wpa_wnmsleep_igtk_subelem(sta->wpa_sm, pos); 121 if (res < 0) 122 goto fail; 123 igtk_elem_len = res; 124 pos += igtk_elem_len; 125 wpa_printf(MSG_DEBUG, "Pass 4 igtk_len = %d", 126 (int) igtk_elem_len); 127#endif /* CONFIG_IEEE80211W */ 128 129 WPA_PUT_LE16((u8 *) 130 &mgmt->u.action.u.wnm_sleep_resp.keydata_len, 131 gtk_elem_len + igtk_elem_len); 132 } 133 os_memcpy(pos, &wnmsleep_ie, wnmsleep_ie_len); 134 /* copy TFS IE here */ 135 pos += wnmsleep_ie_len; 136 if (wnmtfs_ie) 137 os_memcpy(pos, wnmtfs_ie, wnmtfs_ie_len); 138 139 len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_resp) + gtk_elem_len + 140 igtk_elem_len + wnmsleep_ie_len + wnmtfs_ie_len; 141 142 /* In driver, response frame should be forced to sent when STA is in 143 * PS mode */ 144 res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0, 145 mgmt->da, &mgmt->u.action.category, len); 146 147 if (!res) { 148 wpa_printf(MSG_DEBUG, "Successfully send WNM-Sleep Response " 149 "frame"); 150 151 /* when entering wnmsleep 152 * 1. pause the node in driver 153 * 2. mark the node so that AP won't update GTK/IGTK during 154 * WNM Sleep 155 */ 156 if (wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT && 157 wnmsleep_ie.action_type == WNM_SLEEP_MODE_ENTER) { 158 sta->flags |= WLAN_STA_WNM_SLEEP_MODE; 159 hostapd_drv_wnm_oper(hapd, WNM_SLEEP_ENTER_CONFIRM, 160 addr, NULL, NULL); 161 wpa_set_wnmsleep(sta->wpa_sm, 1); 162 } 163 /* when exiting wnmsleep 164 * 1. unmark the node 165 * 2. start GTK/IGTK update if MFP is not used 166 * 3. unpause the node in driver 167 */ 168 if ((wnmsleep_ie.status == WNM_STATUS_SLEEP_ACCEPT || 169 wnmsleep_ie.status == 170 WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) && 171 wnmsleep_ie.action_type == WNM_SLEEP_MODE_EXIT) { 172 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE; 173 wpa_set_wnmsleep(sta->wpa_sm, 0); 174 hostapd_drv_wnm_oper(hapd, WNM_SLEEP_EXIT_CONFIRM, 175 addr, NULL, NULL); 176 if (!wpa_auth_uses_mfp(sta->wpa_sm)) 177 wpa_wnmsleep_rekey_gtk(sta->wpa_sm); 178 } 179 } else 180 wpa_printf(MSG_DEBUG, "Fail to send WNM-Sleep Response frame"); 181 182#undef MAX_GTK_SUBELEM_LEN 183#undef MAX_IGTK_SUBELEM_LEN 184fail: 185 os_free(wnmtfs_ie); 186 os_free(mgmt); 187 return res; 188} 189 190 191static 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 ie_len >= (int) sizeof(*wnmsleep_ie) - 2) 210 wnmsleep_ie = (struct wnm_sleep_element *) pos; 211 else if (*pos == WLAN_EID_TFS_REQ) { 212 if (!tfsreq_ie_start) 213 tfsreq_ie_start = (u8 *) pos; 214 tfsreq_ie_end = (u8 *) pos; 215 } else 216 wpa_printf(MSG_DEBUG, "WNM: EID %d not recognized", 217 *pos); 218 pos += ie_len + 2; 219 } 220 221 if (!wnmsleep_ie) { 222 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found"); 223 return; 224 } 225 226 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER && 227 tfsreq_ie_start && tfsreq_ie_end && 228 tfsreq_ie_end - tfsreq_ie_start >= 0) { 229 tfsreq_ie_len = (tfsreq_ie_end + tfsreq_ie_end[1] + 2) - 230 tfsreq_ie_start; 231 wpa_printf(MSG_DEBUG, "TFS Req IE(s) found"); 232 /* pass the TFS Req IE(s) to driver for processing */ 233 if (ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start, 234 &tfsreq_ie_len, 235 WNM_SLEEP_TFS_REQ_IE_SET)) 236 wpa_printf(MSG_DEBUG, "Fail to set TFS Req IE"); 237 } 238 239 ieee802_11_send_wnmsleep_resp(hapd, addr, dialog_token, 240 wnmsleep_ie->action_type, 241 le_to_host16(wnmsleep_ie->intval)); 242 243 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) { 244 /* clear the tfs after sending the resp frame */ 245 ieee80211_11_set_tfs_ie(hapd, addr, tfsreq_ie_start, 246 &tfsreq_ie_len, WNM_SLEEP_TFS_IE_DEL); 247 } 248} 249 250 251static int ieee802_11_send_bss_trans_mgmt_request(struct hostapd_data *hapd, 252 const u8 *addr, 253 u8 dialog_token) 254{ 255 struct ieee80211_mgmt *mgmt; 256 size_t len; 257 u8 *pos; 258 int res; 259 260 mgmt = os_zalloc(sizeof(*mgmt)); 261 if (mgmt == NULL) 262 return -1; 263 os_memcpy(mgmt->da, addr, ETH_ALEN); 264 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 265 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 266 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 267 WLAN_FC_STYPE_ACTION); 268 mgmt->u.action.category = WLAN_ACTION_WNM; 269 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 270 mgmt->u.action.u.bss_tm_req.dialog_token = dialog_token; 271 mgmt->u.action.u.bss_tm_req.req_mode = 0; 272 mgmt->u.action.u.bss_tm_req.disassoc_timer = host_to_le16(0); 273 mgmt->u.action.u.bss_tm_req.validity_interval = 1; 274 pos = mgmt->u.action.u.bss_tm_req.variable; 275 276 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to " 277 MACSTR " dialog_token=%u req_mode=0x%x disassoc_timer=%u " 278 "validity_interval=%u", 279 MAC2STR(addr), dialog_token, 280 mgmt->u.action.u.bss_tm_req.req_mode, 281 le_to_host16(mgmt->u.action.u.bss_tm_req.disassoc_timer), 282 mgmt->u.action.u.bss_tm_req.validity_interval); 283 284 len = pos - &mgmt->u.action.category; 285 res = hostapd_drv_send_action(hapd, hapd->iface->freq, 0, 286 mgmt->da, &mgmt->u.action.category, len); 287 os_free(mgmt); 288 return res; 289} 290 291 292static void ieee802_11_rx_bss_trans_mgmt_query(struct hostapd_data *hapd, 293 const u8 *addr, const u8 *frm, 294 size_t len) 295{ 296 u8 dialog_token, reason; 297 const u8 *pos, *end; 298 299 if (len < 2) { 300 wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Query from " 301 MACSTR, MAC2STR(addr)); 302 return; 303 } 304 305 pos = frm; 306 end = pos + len; 307 dialog_token = *pos++; 308 reason = *pos++; 309 310 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Query from " 311 MACSTR " dialog_token=%u reason=%u", 312 MAC2STR(addr), dialog_token, reason); 313 314 wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries", 315 pos, end - pos); 316 317 ieee802_11_send_bss_trans_mgmt_request(hapd, addr, dialog_token); 318} 319 320 321static void ieee802_11_rx_bss_trans_mgmt_resp(struct hostapd_data *hapd, 322 const u8 *addr, const u8 *frm, 323 size_t len) 324{ 325 u8 dialog_token, status_code, bss_termination_delay; 326 const u8 *pos, *end; 327 328 if (len < 3) { 329 wpa_printf(MSG_DEBUG, "WNM: Ignore too short BSS Transition Management Response from " 330 MACSTR, MAC2STR(addr)); 331 return; 332 } 333 334 pos = frm; 335 end = pos + len; 336 dialog_token = *pos++; 337 status_code = *pos++; 338 bss_termination_delay = *pos++; 339 340 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Response from " 341 MACSTR " dialog_token=%u status_code=%u " 342 "bss_termination_delay=%u", MAC2STR(addr), dialog_token, 343 status_code, bss_termination_delay); 344 345 if (status_code == WNM_BSS_TM_ACCEPT) { 346 if (end - pos < ETH_ALEN) { 347 wpa_printf(MSG_DEBUG, "WNM: not enough room for Target BSSID field"); 348 return; 349 } 350 wpa_printf(MSG_DEBUG, "WNM: Target BSSID: " MACSTR, 351 MAC2STR(pos)); 352 wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR 353 " status_code=%u bss_termination_delay=%u target_bssid=" 354 MACSTR, 355 MAC2STR(addr), status_code, bss_termination_delay, 356 MAC2STR(pos)); 357 pos += ETH_ALEN; 358 } else { 359 wpa_msg(hapd->msg_ctx, MSG_INFO, BSS_TM_RESP MACSTR 360 " status_code=%u bss_termination_delay=%u", 361 MAC2STR(addr), status_code, bss_termination_delay); 362 } 363 364 wpa_hexdump(MSG_DEBUG, "WNM: BSS Transition Candidate List Entries", 365 pos, end - pos); 366} 367 368 369static void ieee802_11_rx_wnm_notification_req(struct hostapd_data *hapd, 370 const u8 *addr, const u8 *buf, 371 size_t len) 372{ 373 u8 dialog_token, type; 374 375 if (len < 2) 376 return; 377 dialog_token = *buf++; 378 type = *buf++; 379 len -= 2; 380 381 wpa_printf(MSG_DEBUG, 382 "WNM: Received WNM Notification Request frame from " 383 MACSTR " (dialog_token=%u type=%u)", 384 MAC2STR(addr), dialog_token, type); 385 wpa_hexdump(MSG_MSGDUMP, "WNM: Notification Request subelements", 386 buf, len); 387 if (type == WLAN_EID_VENDOR_SPECIFIC) 388 mbo_ap_wnm_notification_req(hapd, addr, buf, len); 389} 390 391 392int ieee802_11_rx_wnm_action_ap(struct hostapd_data *hapd, 393 const struct ieee80211_mgmt *mgmt, size_t len) 394{ 395 u8 action; 396 const u8 *payload; 397 size_t plen; 398 399 if (len < IEEE80211_HDRLEN + 2) 400 return -1; 401 402 payload = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1; 403 action = *payload++; 404 plen = len - IEEE80211_HDRLEN - 2; 405 406 switch (action) { 407 case WNM_BSS_TRANS_MGMT_QUERY: 408 ieee802_11_rx_bss_trans_mgmt_query(hapd, mgmt->sa, payload, 409 plen); 410 return 0; 411 case WNM_BSS_TRANS_MGMT_RESP: 412 ieee802_11_rx_bss_trans_mgmt_resp(hapd, mgmt->sa, payload, 413 plen); 414 return 0; 415 case WNM_SLEEP_MODE_REQ: 416 ieee802_11_rx_wnmsleep_req(hapd, mgmt->sa, payload, plen); 417 return 0; 418 case WNM_NOTIFICATION_REQ: 419 ieee802_11_rx_wnm_notification_req(hapd, mgmt->sa, payload, 420 plen); 421 return 0; 422 } 423 424 wpa_printf(MSG_DEBUG, "WNM: Unsupported WNM Action %u from " MACSTR, 425 action, MAC2STR(mgmt->sa)); 426 return -1; 427} 428 429 430int wnm_send_disassoc_imminent(struct hostapd_data *hapd, 431 struct sta_info *sta, int disassoc_timer) 432{ 433 u8 buf[1000], *pos; 434 struct ieee80211_mgmt *mgmt; 435 436 os_memset(buf, 0, sizeof(buf)); 437 mgmt = (struct ieee80211_mgmt *) buf; 438 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 439 WLAN_FC_STYPE_ACTION); 440 os_memcpy(mgmt->da, sta->addr, ETH_ALEN); 441 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 442 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 443 mgmt->u.action.category = WLAN_ACTION_WNM; 444 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 445 mgmt->u.action.u.bss_tm_req.dialog_token = 1; 446 mgmt->u.action.u.bss_tm_req.req_mode = 447 WNM_BSS_TM_REQ_DISASSOC_IMMINENT; 448 mgmt->u.action.u.bss_tm_req.disassoc_timer = 449 host_to_le16(disassoc_timer); 450 mgmt->u.action.u.bss_tm_req.validity_interval = 0; 451 452 pos = mgmt->u.action.u.bss_tm_req.variable; 453 454 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request frame to indicate imminent disassociation (disassoc_timer=%d) to " 455 MACSTR, disassoc_timer, MAC2STR(sta->addr)); 456 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) { 457 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition " 458 "Management Request frame"); 459 return -1; 460 } 461 462 return 0; 463} 464 465 466static void set_disassoc_timer(struct hostapd_data *hapd, struct sta_info *sta, 467 int disassoc_timer) 468{ 469 int timeout, beacon_int; 470 471 /* 472 * Prevent STA from reconnecting using cached PMKSA to force 473 * full authentication with the authentication server (which may 474 * decide to reject the connection), 475 */ 476 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 477 478 beacon_int = hapd->iconf->beacon_int; 479 if (beacon_int < 1) 480 beacon_int = 100; /* best guess */ 481 /* Calculate timeout in ms based on beacon_int in TU */ 482 timeout = disassoc_timer * beacon_int * 128 / 125; 483 wpa_printf(MSG_DEBUG, "Disassociation timer for " MACSTR 484 " set to %d ms", MAC2STR(sta->addr), timeout); 485 486 sta->timeout_next = STA_DISASSOC_FROM_CLI; 487 eloop_cancel_timeout(ap_handle_timer, hapd, sta); 488 eloop_register_timeout(timeout / 1000, 489 timeout % 1000 * 1000, 490 ap_handle_timer, hapd, sta); 491} 492 493 494int wnm_send_ess_disassoc_imminent(struct hostapd_data *hapd, 495 struct sta_info *sta, const char *url, 496 int disassoc_timer) 497{ 498 u8 buf[1000], *pos; 499 struct ieee80211_mgmt *mgmt; 500 size_t url_len; 501 502 os_memset(buf, 0, sizeof(buf)); 503 mgmt = (struct ieee80211_mgmt *) buf; 504 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 505 WLAN_FC_STYPE_ACTION); 506 os_memcpy(mgmt->da, sta->addr, ETH_ALEN); 507 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 508 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 509 mgmt->u.action.category = WLAN_ACTION_WNM; 510 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 511 mgmt->u.action.u.bss_tm_req.dialog_token = 1; 512 mgmt->u.action.u.bss_tm_req.req_mode = 513 WNM_BSS_TM_REQ_DISASSOC_IMMINENT | 514 WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT; 515 mgmt->u.action.u.bss_tm_req.disassoc_timer = 516 host_to_le16(disassoc_timer); 517 mgmt->u.action.u.bss_tm_req.validity_interval = 0x01; 518 519 pos = mgmt->u.action.u.bss_tm_req.variable; 520 521 /* Session Information URL */ 522 url_len = os_strlen(url); 523 if (url_len > 255) 524 return -1; 525 *pos++ = url_len; 526 os_memcpy(pos, url, url_len); 527 pos += url_len; 528 529 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) { 530 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition " 531 "Management Request frame"); 532 return -1; 533 } 534 535 if (disassoc_timer) { 536 /* send disassociation frame after time-out */ 537 set_disassoc_timer(hapd, sta, disassoc_timer); 538 } 539 540 return 0; 541} 542 543 544int wnm_send_bss_tm_req(struct hostapd_data *hapd, struct sta_info *sta, 545 u8 req_mode, int disassoc_timer, u8 valid_int, 546 const u8 *bss_term_dur, const char *url, 547 const u8 *nei_rep, size_t nei_rep_len, 548 const u8 *mbo_attrs, size_t mbo_len) 549{ 550 u8 *buf, *pos; 551 struct ieee80211_mgmt *mgmt; 552 size_t url_len; 553 554 wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Request to " 555 MACSTR " req_mode=0x%x disassoc_timer=%d valid_int=0x%x", 556 MAC2STR(sta->addr), req_mode, disassoc_timer, valid_int); 557 buf = os_zalloc(1000 + nei_rep_len + mbo_len); 558 if (buf == NULL) 559 return -1; 560 mgmt = (struct ieee80211_mgmt *) buf; 561 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 562 WLAN_FC_STYPE_ACTION); 563 os_memcpy(mgmt->da, sta->addr, ETH_ALEN); 564 os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN); 565 os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN); 566 mgmt->u.action.category = WLAN_ACTION_WNM; 567 mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ; 568 mgmt->u.action.u.bss_tm_req.dialog_token = 1; 569 mgmt->u.action.u.bss_tm_req.req_mode = req_mode; 570 mgmt->u.action.u.bss_tm_req.disassoc_timer = 571 host_to_le16(disassoc_timer); 572 mgmt->u.action.u.bss_tm_req.validity_interval = valid_int; 573 574 pos = mgmt->u.action.u.bss_tm_req.variable; 575 576 if ((req_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) && 577 bss_term_dur) { 578 os_memcpy(pos, bss_term_dur, 12); 579 pos += 12; 580 } 581 582 if (url) { 583 /* Session Information URL */ 584 url_len = os_strlen(url); 585 if (url_len > 255) { 586 os_free(buf); 587 return -1; 588 } 589 590 *pos++ = url_len; 591 os_memcpy(pos, url, url_len); 592 pos += url_len; 593 } 594 595 if (nei_rep) { 596 os_memcpy(pos, nei_rep, nei_rep_len); 597 pos += nei_rep_len; 598 } 599 600 if (mbo_len > 0) { 601 pos += mbo_add_ie(pos, buf + sizeof(buf) - pos, mbo_attrs, 602 mbo_len); 603 } 604 605 if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) { 606 wpa_printf(MSG_DEBUG, 607 "Failed to send BSS Transition Management Request frame"); 608 os_free(buf); 609 return -1; 610 } 611 os_free(buf); 612 613 if (disassoc_timer) { 614 /* send disassociation frame after time-out */ 615 set_disassoc_timer(hapd, sta, disassoc_timer); 616 } 617 618 return 0; 619} 620