fst_session.c revision 055a67c81da597ef09906f302da1303c9039fe86
1/* 2 * FST module - FST Session implementation 3 * Copyright (c) 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/defs.h" 14#include "fst/fst_internal.h" 15#include "fst/fst_defs.h" 16#include "fst/fst_ctrl_iface.h" 17#ifdef CONFIG_FST_TEST 18#include "fst/fst_ctrl_defs.h" 19#endif /* CONFIG_FST_TEST */ 20 21#define US_80211_TU 1024 22 23#define US_TO_TU(m) ((m) * / US_80211_TU) 24#define TU_TO_US(m) ((m) * US_80211_TU) 25 26#define FST_LLT_SWITCH_IMMEDIATELY 0 27 28#define fst_printf_session(s, level, format, ...) \ 29 fst_printf((level), "%u (0x%08x): [" MACSTR "," MACSTR "] :" format, \ 30 (s)->id, (s)->data.fsts_id, \ 31 MAC2STR((s)->data.old_peer_addr), \ 32 MAC2STR((s)->data.new_peer_addr), \ 33 ##__VA_ARGS__) 34 35#define fst_printf_siface(s, iface, level, format, ...) \ 36 fst_printf_session((s), (level), "%s: " format, \ 37 fst_iface_get_name(iface), ##__VA_ARGS__) 38 39#define fst_printf_sframe(s, is_old, level, format, ...) \ 40 fst_printf_siface((s), \ 41 (is_old) ? (s)->data.old_iface : (s)->data.new_iface, \ 42 (level), format, ##__VA_ARGS__) 43 44#define FST_LLT_MS_DEFAULT 50 45#define FST_ACTION_MAX_SUPPORTED FST_ACTION_ON_CHANNEL_TUNNEL 46 47static const char * const fst_action_names[] = { 48 [FST_ACTION_SETUP_REQUEST] = "Setup Request", 49 [FST_ACTION_SETUP_RESPONSE] = "Setup Response", 50 [FST_ACTION_TEAR_DOWN] = "Tear Down", 51 [FST_ACTION_ACK_REQUEST] = "Ack Request", 52 [FST_ACTION_ACK_RESPONSE] = "Ack Response", 53 [FST_ACTION_ON_CHANNEL_TUNNEL] = "On Channel Tunnel", 54}; 55 56struct fst_session { 57 struct { 58 /* Session configuration that can be zeroed on reset */ 59 u8 old_peer_addr[ETH_ALEN]; 60 u8 new_peer_addr[ETH_ALEN]; 61 struct fst_iface *new_iface; 62 struct fst_iface *old_iface; 63 u32 llt_ms; 64 u8 pending_setup_req_dlgt; 65 u32 fsts_id; /* FSTS ID, see spec, 8.4.2.147 66 * Session Transition element */ 67 } data; 68 /* Session object internal fields which won't be zeroed on reset */ 69 struct dl_list global_sessions_lentry; 70 u32 id; /* Session object ID used to identify 71 * specific session object */ 72 struct fst_group *group; 73 enum fst_session_state state; 74 Boolean stt_armed; 75}; 76 77static struct dl_list global_sessions_list; 78static u32 global_session_id = 0; 79 80#define foreach_fst_session(s) \ 81 dl_list_for_each((s), &global_sessions_list, \ 82 struct fst_session, global_sessions_lentry) 83 84#define foreach_fst_session_safe(s, temp) \ 85 dl_list_for_each_safe((s), (temp), &global_sessions_list, \ 86 struct fst_session, global_sessions_lentry) 87 88 89static void fst_session_global_inc_id(void) 90{ 91 global_session_id++; 92 if (global_session_id == FST_INVALID_SESSION_ID) 93 global_session_id++; 94} 95 96 97int fst_session_global_init(void) 98{ 99 dl_list_init(&global_sessions_list); 100 return 0; 101} 102 103 104void fst_session_global_deinit(void) 105{ 106 WPA_ASSERT(dl_list_empty(&global_sessions_list)); 107} 108 109 110static inline void fst_session_notify_ctrl(struct fst_session *s, 111 enum fst_event_type event_type, 112 union fst_event_extra *extra) 113{ 114 foreach_fst_ctrl_call(on_event, event_type, NULL, s, extra); 115} 116 117 118static void fst_session_set_state(struct fst_session *s, 119 enum fst_session_state state, 120 union fst_session_state_switch_extra *extra) 121{ 122 if (s->state != state) { 123 union fst_event_extra evext = { 124 .session_state = { 125 .old_state = s->state, 126 .new_state = state, 127 }, 128 }; 129 130 if (extra) 131 evext.session_state.extra = *extra; 132 fst_session_notify_ctrl(s, EVENT_FST_SESSION_STATE_CHANGED, 133 &evext); 134 fst_printf_session(s, MSG_INFO, "State: %s => %s", 135 fst_session_state_name(s->state), 136 fst_session_state_name(state)); 137 s->state = state; 138 } 139} 140 141 142static u32 fst_find_free_session_id(void) 143{ 144 u32 i, id = FST_INVALID_SESSION_ID; 145 struct fst_session *s; 146 147 for (i = 0; i < (u32) -1; i++) { 148 Boolean in_use = FALSE; 149 150 foreach_fst_session(s) { 151 if (s->id == global_session_id) { 152 fst_session_global_inc_id(); 153 in_use = TRUE; 154 break; 155 } 156 } 157 if (!in_use) { 158 id = global_session_id; 159 fst_session_global_inc_id(); 160 break; 161 } 162 } 163 164 return id; 165} 166 167 168static void fst_session_timeout_handler(void *eloop_data, void *user_ctx) 169{ 170 struct fst_session *s = user_ctx; 171 union fst_session_state_switch_extra extra = { 172 .to_initial = { 173 .reason = REASON_STT, 174 }, 175 }; 176 177 fst_printf_session(s, MSG_WARNING, "Session State Timeout"); 178 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &extra); 179} 180 181 182static void fst_session_stt_arm(struct fst_session *s) 183{ 184 /* Action frames sometimes get delayed. Use relaxed timeout (2*) */ 185 eloop_register_timeout(0, 2 * TU_TO_US(FST_DEFAULT_SESSION_TIMEOUT_TU), 186 fst_session_timeout_handler, NULL, s); 187 s->stt_armed = TRUE; 188} 189 190 191static void fst_session_stt_disarm(struct fst_session *s) 192{ 193 if (s->stt_armed) { 194 eloop_cancel_timeout(fst_session_timeout_handler, NULL, s); 195 s->stt_armed = FALSE; 196 } 197} 198 199 200static Boolean fst_session_is_in_transition(struct fst_session *s) 201{ 202 /* See spec, 10.32.2.2 Transitioning between states */ 203 return s->stt_armed; 204} 205 206 207static int fst_session_is_in_progress(struct fst_session *s) 208{ 209 return s->state != FST_SESSION_STATE_INITIAL; 210} 211 212 213static int fst_session_is_ready_pending(struct fst_session *s) 214{ 215 return s->state == FST_SESSION_STATE_SETUP_COMPLETION && 216 fst_session_is_in_transition(s); 217} 218 219 220static int fst_session_is_ready(struct fst_session *s) 221{ 222 return s->state == FST_SESSION_STATE_SETUP_COMPLETION && 223 !fst_session_is_in_transition(s); 224} 225 226 227static int fst_session_is_switch_requested(struct fst_session *s) 228{ 229 return s->state == FST_SESSION_STATE_TRANSITION_DONE && 230 fst_session_is_in_transition(s); 231} 232 233 234static struct fst_session * 235fst_find_session_in_progress(const u8 *peer_addr, struct fst_group *g) 236{ 237 struct fst_session *s; 238 239 foreach_fst_session(s) { 240 if (s->group == g && 241 (os_memcmp(s->data.old_peer_addr, peer_addr, 242 ETH_ALEN) == 0 || 243 os_memcmp(s->data.new_peer_addr, peer_addr, 244 ETH_ALEN) == 0) && 245 fst_session_is_in_progress(s)) 246 return s; 247 } 248 249 return NULL; 250} 251 252 253static void fst_session_reset_ex(struct fst_session *s, enum fst_reason reason) 254{ 255 union fst_session_state_switch_extra evext = { 256 .to_initial = { 257 .reason = reason, 258 }, 259 }; 260 261 if (s->state == FST_SESSION_STATE_SETUP_COMPLETION || 262 s->state == FST_SESSION_STATE_TRANSITION_DONE) 263 fst_session_tear_down_setup(s); 264 fst_session_stt_disarm(s); 265 os_memset(&s->data, 0, sizeof(s->data)); 266 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 267} 268 269 270static int fst_session_send_action(struct fst_session *s, Boolean old_iface, 271 const void *payload, size_t size, 272 const struct wpabuf *extra_buf) 273{ 274 size_t len; 275 int res; 276 struct wpabuf *buf; 277 u8 action; 278 struct fst_iface *iface = 279 old_iface ? s->data.old_iface : s->data.new_iface; 280 281 WPA_ASSERT(payload != NULL); 282 WPA_ASSERT(size != 0); 283 284 action = *(const u8 *) payload; 285 286 WPA_ASSERT(action <= FST_ACTION_MAX_SUPPORTED); 287 288 if (!iface) { 289 fst_printf_session(s, MSG_ERROR, 290 "no %s interface for FST Action '%s' sending", 291 old_iface ? "old" : "new", 292 fst_action_names[action]); 293 return -1; 294 } 295 296 len = sizeof(u8) /* category */ + size; 297 if (extra_buf) 298 len += wpabuf_size(extra_buf); 299 300 buf = wpabuf_alloc(len); 301 if (!buf) { 302 fst_printf_session(s, MSG_ERROR, 303 "cannot allocate buffer of %zu bytes for FST Action '%s' sending", 304 len, fst_action_names[action]); 305 return -1; 306 } 307 308 wpabuf_put_u8(buf, WLAN_ACTION_FST); 309 wpabuf_put_data(buf, payload, size); 310 if (extra_buf) 311 wpabuf_put_buf(buf, extra_buf); 312 313 res = fst_iface_send_action(iface, 314 old_iface ? s->data.old_peer_addr : 315 s->data.new_peer_addr, buf); 316 if (res < 0) 317 fst_printf_siface(s, iface, MSG_ERROR, 318 "failed to send FST Action '%s'", 319 fst_action_names[action]); 320 else 321 fst_printf_siface(s, iface, MSG_DEBUG, "FST Action '%s' sent", 322 fst_action_names[action]); 323 wpabuf_free(buf); 324 325 return res; 326} 327 328 329static int fst_session_send_tear_down(struct fst_session *s) 330{ 331 struct fst_tear_down td; 332 int res; 333 334 if (!fst_session_is_in_progress(s)) { 335 fst_printf_session(s, MSG_ERROR, "No FST setup to tear down"); 336 return -1; 337 } 338 339 WPA_ASSERT(s->data.old_iface != NULL); 340 WPA_ASSERT(s->data.new_iface != NULL); 341 342 os_memset(&td, 0, sizeof(td)); 343 344 td.action = FST_ACTION_TEAR_DOWN; 345 td.fsts_id = host_to_le32(s->data.fsts_id); 346 347 res = fst_session_send_action(s, TRUE, &td, sizeof(td), NULL); 348 if (!res) 349 fst_printf_sframe(s, TRUE, MSG_INFO, "FST TearDown sent"); 350 else 351 fst_printf_sframe(s, TRUE, MSG_ERROR, 352 "failed to send FST TearDown"); 353 354 return res; 355} 356 357 358static void fst_session_handle_setup_request(struct fst_iface *iface, 359 const struct ieee80211_mgmt *mgmt, 360 size_t frame_len) 361{ 362 struct fst_session *s; 363 const struct fst_setup_req *req; 364 struct fst_iface *new_iface = NULL; 365 struct fst_group *g; 366 u8 new_iface_peer_addr[ETH_ALEN]; 367 size_t plen; 368 369 if (frame_len < IEEE80211_HDRLEN + 1 + sizeof(*req)) { 370 fst_printf_iface(iface, MSG_WARNING, 371 "FST Request dropped: too short (%zu < %zu)", 372 frame_len, 373 IEEE80211_HDRLEN + 1 + sizeof(*req)); 374 return; 375 } 376 plen = frame_len - IEEE80211_HDRLEN - 1; 377 req = (const struct fst_setup_req *) 378 (((const u8 *) mgmt) + IEEE80211_HDRLEN + 1); 379 if (req->stie.element_id != WLAN_EID_SESSION_TRANSITION || 380 req->stie.length < 11) { 381 fst_printf_iface(iface, MSG_WARNING, 382 "FST Request dropped: invalid STIE"); 383 return; 384 } 385 386 if (req->stie.new_band_id == req->stie.old_band_id) { 387 fst_printf_iface(iface, MSG_WARNING, 388 "FST Request dropped: new and old band IDs are the same"); 389 return; 390 } 391 392 g = fst_iface_get_group(iface); 393 394 if (plen > sizeof(*req)) { 395 fst_iface_update_mb_ie(iface, mgmt->sa, (const u8 *) (req + 1), 396 plen - sizeof(*req)); 397 fst_printf_iface(iface, MSG_INFO, 398 "FST Request: MB IEs updated for " MACSTR, 399 MAC2STR(mgmt->sa)); 400 } 401 402 new_iface = fst_group_get_peer_other_connection(iface, mgmt->sa, 403 req->stie.new_band_id, 404 new_iface_peer_addr); 405 if (!new_iface) { 406 fst_printf_iface(iface, MSG_WARNING, 407 "FST Request dropped: new iface not found"); 408 return; 409 } 410 fst_printf_iface(iface, MSG_INFO, 411 "FST Request: new iface (%s:" MACSTR ") found", 412 fst_iface_get_name(new_iface), 413 MAC2STR(new_iface_peer_addr)); 414 415 s = fst_find_session_in_progress(mgmt->sa, g); 416 if (s) { 417 union fst_session_state_switch_extra evext = { 418 .to_initial = { 419 .reason = REASON_SETUP, 420 }, 421 }; 422 423 /* 424 * 10.32.2.2 Transitioning between states: 425 * Upon receipt of an FST Setup Request frame, the responder 426 * shall respond with an FST Setup Response frame unless it has 427 * a pending FST Setup Request frame addressed to the initiator 428 * and the responder has a numerically larger MAC address than 429 * the initiator’s MAC address, in which case, the responder 430 * shall delete the received FST Setup Request. 431 */ 432 if (fst_session_is_ready_pending(s) && 433 /* waiting for Setup Response */ 434 os_memcmp(mgmt->da, mgmt->sa, ETH_ALEN) > 0) { 435 fst_printf_session(s, MSG_WARNING, 436 "FST Request dropped due to MAC comparison (our MAC is " 437 MACSTR ")", 438 MAC2STR(mgmt->da)); 439 return; 440 } 441 442 /* 443 * State is SETUP_COMPLETION (either in transition or not) or 444 * TRANSITION_DONE (in transition). 445 * Setup Request arriving in this state could mean: 446 * 1. peer sent it before receiving our Setup Request (race 447 * condition) 448 * 2. peer didn't receive our Setup Response. Peer is retrying 449 * after STT timeout 450 * 3. peer's FST state machines are out of sync due to some 451 * other reason 452 * 453 * We will reset our session and create a new one instead. 454 */ 455 456 fst_printf_session(s, MSG_WARNING, 457 "resetting due to FST request"); 458 459 /* 460 * If FST Setup Request arrived with the same FSTS ID as one we 461 * initialized before, there's no need to tear down the session. 462 * Moreover, as FSTS ID is the same, the other side will 463 * associate this tear down with the session it initiated that 464 * will break the sync. 465 */ 466 if (le_to_host32(req->stie.fsts_id) != s->data.fsts_id) 467 fst_session_send_tear_down(s); 468 else 469 fst_printf_session(s, MSG_WARNING, 470 "Skipping TearDown as the FST request has the same FSTS ID as initiated"); 471 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 472 fst_session_stt_disarm(s); 473 } 474 475 s = fst_session_create(g); 476 if (!s) { 477 fst_printf(MSG_WARNING, 478 "FST Request dropped: cannot create session for %s and %s", 479 fst_iface_get_name(iface), 480 fst_iface_get_name(new_iface)); 481 return; 482 } 483 484 fst_session_set_iface(s, iface, TRUE); 485 fst_session_set_peer_addr(s, mgmt->sa, TRUE); 486 fst_session_set_iface(s, new_iface, FALSE); 487 fst_session_set_peer_addr(s, new_iface_peer_addr, FALSE); 488 fst_session_set_llt(s, FST_LLT_VAL_TO_MS(le_to_host32(req->llt))); 489 s->data.pending_setup_req_dlgt = req->dialog_token; 490 s->data.fsts_id = le_to_host32(req->stie.fsts_id); 491 492 fst_session_stt_arm(s); 493 494 fst_session_notify_ctrl(s, EVENT_FST_SETUP, NULL); 495 496 fst_session_set_state(s, FST_SESSION_STATE_SETUP_COMPLETION, NULL); 497} 498 499 500static void fst_session_handle_setup_response(struct fst_session *s, 501 struct fst_iface *iface, 502 const struct ieee80211_mgmt *mgmt, 503 size_t frame_len) 504{ 505 const struct fst_setup_res *res; 506 size_t plen = frame_len - IEEE80211_HDRLEN - 1; 507 enum hostapd_hw_mode hw_mode; 508 u8 channel; 509 union fst_session_state_switch_extra evext = { 510 .to_initial = { 511 .reject_code = 0, 512 }, 513 }; 514 515 if (iface != s->data.old_iface) { 516 fst_printf_session(s, MSG_WARNING, 517 "FST Response dropped: %s is not the old iface", 518 fst_iface_get_name(iface)); 519 return; 520 } 521 522 if (!fst_session_is_ready_pending(s)) { 523 fst_printf_session(s, MSG_WARNING, 524 "FST Response dropped due to wrong state: %s", 525 fst_session_state_name(s->state)); 526 return; 527 } 528 529 if (plen < sizeof(*res)) { 530 fst_printf_session(s, MSG_WARNING, 531 "Too short FST Response dropped"); 532 return; 533 } 534 res = (const struct fst_setup_res *) 535 (((const u8 *) mgmt) + IEEE80211_HDRLEN + 1); 536 if (res->stie.element_id != WLAN_EID_SESSION_TRANSITION || 537 res->stie.length < 11) { 538 fst_printf_iface(iface, MSG_WARNING, 539 "FST Response dropped: invalid STIE"); 540 return; 541 } 542 543 if (res->dialog_token != s->data.pending_setup_req_dlgt) { 544 fst_printf_session(s, MSG_WARNING, 545 "FST Response dropped due to wrong dialog token (%u != %u)", 546 s->data.pending_setup_req_dlgt, 547 res->dialog_token); 548 return; 549 } 550 551 if (res->status_code == WLAN_STATUS_SUCCESS && 552 le_to_host32(res->stie.fsts_id) != s->data.fsts_id) { 553 fst_printf_session(s, MSG_WARNING, 554 "FST Response dropped due to wrong FST Session ID (%u)", 555 le_to_host32(res->stie.fsts_id)); 556 return; 557 } 558 559 fst_session_stt_disarm(s); 560 561 if (res->status_code != WLAN_STATUS_SUCCESS) { 562 /* 563 * 10.32.2.2 Transitioning between states 564 * The initiator shall set the STT to the value of the 565 * FSTSessionTimeOut field at ... and at each ACK frame sent in 566 * response to a received FST Setup Response with the Status 567 * Code field equal to PENDING_ADMITTING_FST_SESSION or 568 * PENDING_GAP_IN_BA_WINDOW. 569 */ 570 evext.to_initial.reason = REASON_REJECT; 571 evext.to_initial.reject_code = res->status_code; 572 evext.to_initial.initiator = FST_INITIATOR_REMOTE; 573 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 574 fst_printf_session(s, MSG_WARNING, 575 "FST Setup rejected by remote side with status %u", 576 res->status_code); 577 return; 578 } 579 580 fst_iface_get_channel_info(s->data.new_iface, &hw_mode, &channel); 581 582 if (fst_hw_mode_to_band(hw_mode) != res->stie.new_band_id) { 583 evext.to_initial.reason = REASON_ERROR_PARAMS; 584 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 585 fst_printf_session(s, MSG_WARNING, 586 "invalid FST Setup parameters"); 587 fst_session_tear_down_setup(s); 588 return; 589 } 590 591 fst_printf_session(s, MSG_INFO, 592 "%s: FST Setup established for %s (llt=%u)", 593 fst_iface_get_name(s->data.old_iface), 594 fst_iface_get_name(s->data.new_iface), 595 s->data.llt_ms); 596 597 fst_session_notify_ctrl(s, EVENT_FST_ESTABLISHED, NULL); 598 599 if (s->data.llt_ms == FST_LLT_SWITCH_IMMEDIATELY) 600 fst_session_initiate_switch(s); 601} 602 603 604static void fst_session_handle_tear_down(struct fst_session *s, 605 struct fst_iface *iface, 606 const struct ieee80211_mgmt *mgmt, 607 size_t frame_len) 608{ 609 const struct fst_tear_down *td; 610 size_t plen = frame_len - IEEE80211_HDRLEN - 1; 611 union fst_session_state_switch_extra evext = { 612 .to_initial = { 613 .reason = REASON_TEARDOWN, 614 .initiator = FST_INITIATOR_REMOTE, 615 }, 616 }; 617 618 if (plen < sizeof(*td)) { 619 fst_printf_session(s, MSG_WARNING, 620 "Too short FST Tear Down dropped"); 621 return; 622 } 623 td = (const struct fst_tear_down *) 624 (((const u8 *) mgmt) + IEEE80211_HDRLEN + 1); 625 626 if (le_to_host32(td->fsts_id) != s->data.fsts_id) { 627 fst_printf_siface(s, iface, MSG_WARNING, 628 "tear down for wrong FST Setup ID (%u)", 629 le_to_host32(td->fsts_id)); 630 return; 631 } 632 633 fst_session_stt_disarm(s); 634 635 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 636} 637 638 639static void fst_session_handle_ack_request(struct fst_session *s, 640 struct fst_iface *iface, 641 const struct ieee80211_mgmt *mgmt, 642 size_t frame_len) 643{ 644 const struct fst_ack_req *req; 645 size_t plen = frame_len - IEEE80211_HDRLEN - 1; 646 struct fst_ack_res res; 647 union fst_session_state_switch_extra evext = { 648 .to_initial = { 649 .reason = REASON_SWITCH, 650 .initiator = FST_INITIATOR_REMOTE, 651 }, 652 }; 653 654 if (!fst_session_is_ready(s) && !fst_session_is_switch_requested(s)) { 655 fst_printf_siface(s, iface, MSG_ERROR, 656 "cannot initiate switch due to wrong session state (%s)", 657 fst_session_state_name(s->state)); 658 return; 659 } 660 661 WPA_ASSERT(s->data.new_iface != NULL); 662 663 if (iface != s->data.new_iface) { 664 fst_printf_siface(s, iface, MSG_ERROR, 665 "Ack received on wrong interface"); 666 return; 667 } 668 669 if (plen < sizeof(*req)) { 670 fst_printf_session(s, MSG_WARNING, 671 "Too short FST Ack Request dropped"); 672 return; 673 } 674 req = (const struct fst_ack_req *) 675 (((const u8 *) mgmt) + IEEE80211_HDRLEN + 1); 676 677 if (le_to_host32(req->fsts_id) != s->data.fsts_id) { 678 fst_printf_siface(s, iface, MSG_WARNING, 679 "Ack for wrong FST Setup ID (%u)", 680 le_to_host32(req->fsts_id)); 681 return; 682 } 683 684 os_memset(&res, 0, sizeof(res)); 685 686 res.action = FST_ACTION_ACK_RESPONSE; 687 res.dialog_token = req->dialog_token; 688 res.fsts_id = req->fsts_id; 689 690 if (!fst_session_send_action(s, FALSE, &res, sizeof(res), NULL)) { 691 fst_printf_sframe(s, FALSE, MSG_INFO, "FST Ack Response sent"); 692 fst_session_stt_disarm(s); 693 fst_session_set_state(s, FST_SESSION_STATE_TRANSITION_DONE, 694 NULL); 695 fst_session_set_state(s, FST_SESSION_STATE_TRANSITION_CONFIRMED, 696 NULL); 697 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 698 } 699} 700 701 702static void 703fst_session_handle_ack_response(struct fst_session *s, 704 struct fst_iface *iface, 705 const struct ieee80211_mgmt *mgmt, 706 size_t frame_len) 707{ 708 const struct fst_ack_res *res; 709 size_t plen = frame_len - IEEE80211_HDRLEN - 1; 710 union fst_session_state_switch_extra evext = { 711 .to_initial = { 712 .reason = REASON_SWITCH, 713 .initiator = FST_INITIATOR_LOCAL, 714 }, 715 }; 716 717 if (!fst_session_is_switch_requested(s)) { 718 fst_printf_siface(s, iface, MSG_ERROR, 719 "Ack Response in inappropriate session state (%s)", 720 fst_session_state_name(s->state)); 721 return; 722 } 723 724 WPA_ASSERT(s->data.new_iface != NULL); 725 726 if (iface != s->data.new_iface) { 727 fst_printf_siface(s, iface, MSG_ERROR, 728 "Ack response received on wrong interface"); 729 return; 730 } 731 732 if (plen < sizeof(*res)) { 733 fst_printf_session(s, MSG_WARNING, 734 "Too short FST Ack Response dropped"); 735 return; 736 } 737 res = (const struct fst_ack_res *) 738 (((const u8 *) mgmt) + IEEE80211_HDRLEN + 1); 739 740 if (le_to_host32(res->fsts_id) != s->data.fsts_id) { 741 fst_printf_siface(s, iface, MSG_ERROR, 742 "Ack response for wrong FST Setup ID (%u)", 743 le_to_host32(res->fsts_id)); 744 return; 745 } 746 747 fst_session_set_state(s, FST_SESSION_STATE_TRANSITION_CONFIRMED, NULL); 748 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 749 750 fst_session_stt_disarm(s); 751} 752 753 754struct fst_session * fst_session_create(struct fst_group *g) 755{ 756 struct fst_session *s; 757 u32 id; 758 759 WPA_ASSERT(!is_zero_ether_addr(own_addr)); 760 761 id = fst_find_free_session_id(); 762 if (id == FST_INVALID_SESSION_ID) { 763 fst_printf(MSG_ERROR, "Cannot assign new session ID"); 764 return NULL; 765 } 766 767 s = os_zalloc(sizeof(*s)); 768 if (!s) { 769 fst_printf(MSG_ERROR, "Cannot allocate new session object"); 770 return NULL; 771 } 772 773 s->id = id; 774 s->group = g; 775 s->state = FST_SESSION_STATE_INITIAL; 776 777 s->data.llt_ms = FST_LLT_MS_DEFAULT; 778 779 fst_printf(MSG_INFO, "Session %u created", s->id); 780 781 dl_list_add_tail(&global_sessions_list, &s->global_sessions_lentry); 782 783 foreach_fst_ctrl_call(on_session_added, s); 784 785 return s; 786} 787 788 789void fst_session_set_iface(struct fst_session *s, struct fst_iface *iface, 790 Boolean is_old) 791{ 792 if (is_old) 793 s->data.old_iface = iface; 794 else 795 s->data.new_iface = iface; 796 797} 798 799 800void fst_session_set_llt(struct fst_session *s, u32 llt) 801{ 802 s->data.llt_ms = llt; 803} 804 805 806void fst_session_set_peer_addr(struct fst_session *s, const u8 *addr, 807 Boolean is_old) 808{ 809 u8 *a = is_old ? s->data.old_peer_addr : s->data.new_peer_addr; 810 811 os_memcpy(a, addr, ETH_ALEN); 812} 813 814 815int fst_session_initiate_setup(struct fst_session *s) 816{ 817 struct fst_setup_req req; 818 int res; 819 u32 fsts_id; 820 u8 dialog_token; 821 struct fst_session *_s; 822 823 if (fst_session_is_in_progress(s)) { 824 fst_printf_session(s, MSG_ERROR, "Session in progress"); 825 return -EINVAL; 826 } 827 828 if (is_zero_ether_addr(s->data.old_peer_addr)) { 829 fst_printf_session(s, MSG_ERROR, "No old peer MAC address"); 830 return -EINVAL; 831 } 832 833 if (is_zero_ether_addr(s->data.new_peer_addr)) { 834 fst_printf_session(s, MSG_ERROR, "No new peer MAC address"); 835 return -EINVAL; 836 } 837 838 if (!s->data.old_iface) { 839 fst_printf_session(s, MSG_ERROR, "No old interface defined"); 840 return -EINVAL; 841 } 842 843 if (!s->data.new_iface) { 844 fst_printf_session(s, MSG_ERROR, "No new interface defined"); 845 return -EINVAL; 846 } 847 848 if (s->data.new_iface == s->data.old_iface) { 849 fst_printf_session(s, MSG_ERROR, 850 "Same interface set as old and new"); 851 return -EINVAL; 852 } 853 854 if (!fst_iface_is_connected(s->data.old_iface, s->data.old_peer_addr, 855 FALSE)) { 856 fst_printf_session(s, MSG_ERROR, 857 "The preset old peer address is not connected"); 858 return -EINVAL; 859 } 860 861 if (!fst_iface_is_connected(s->data.new_iface, s->data.new_peer_addr, 862 FALSE)) { 863 fst_printf_session(s, MSG_ERROR, 864 "The preset new peer address is not connected"); 865 return -EINVAL; 866 } 867 868 _s = fst_find_session_in_progress(s->data.old_peer_addr, s->group); 869 if (_s) { 870 fst_printf_session(s, MSG_ERROR, 871 "There is another session in progress (old): %u", 872 _s->id); 873 return -EINVAL; 874 } 875 876 _s = fst_find_session_in_progress(s->data.new_peer_addr, s->group); 877 if (_s) { 878 fst_printf_session(s, MSG_ERROR, 879 "There is another session in progress (new): %u", 880 _s->id); 881 return -EINVAL; 882 } 883 884 dialog_token = fst_group_assign_dialog_token(s->group); 885 fsts_id = fst_group_assign_fsts_id(s->group); 886 887 os_memset(&req, 0, sizeof(req)); 888 889 fst_printf_siface(s, s->data.old_iface, MSG_INFO, 890 "initiating FST setup for %s (llt=%u ms)", 891 fst_iface_get_name(s->data.new_iface), s->data.llt_ms); 892 893 req.action = FST_ACTION_SETUP_REQUEST; 894 req.dialog_token = dialog_token; 895 req.llt = host_to_le32(FST_LLT_MS_TO_VAL(s->data.llt_ms)); 896 /* 8.4.2.147 Session Transition element */ 897 req.stie.element_id = WLAN_EID_SESSION_TRANSITION; 898 req.stie.length = sizeof(req.stie) - 2; 899 req.stie.fsts_id = host_to_le32(fsts_id); 900 req.stie.session_control = SESSION_CONTROL(SESSION_TYPE_BSS, 0); 901 902 req.stie.new_band_id = fst_iface_get_band_id(s->data.new_iface); 903 req.stie.new_band_op = 1; 904 req.stie.new_band_setup = 0; 905 906 req.stie.old_band_id = fst_iface_get_band_id(s->data.old_iface); 907 req.stie.old_band_op = 1; 908 req.stie.old_band_setup = 0; 909 910 res = fst_session_send_action(s, TRUE, &req, sizeof(req), 911 fst_iface_get_mbie(s->data.old_iface)); 912 if (!res) { 913 s->data.fsts_id = fsts_id; 914 s->data.pending_setup_req_dlgt = dialog_token; 915 fst_printf_sframe(s, TRUE, MSG_INFO, "FST Setup Request sent"); 916 fst_session_set_state(s, FST_SESSION_STATE_SETUP_COMPLETION, 917 NULL); 918 919 fst_session_stt_arm(s); 920 } 921 922 return res; 923} 924 925 926int fst_session_respond(struct fst_session *s, u8 status_code) 927{ 928 struct fst_setup_res res; 929 enum hostapd_hw_mode hw_mode; 930 u8 channel; 931 932 if (!fst_session_is_ready_pending(s)) { 933 fst_printf_session(s, MSG_ERROR, "incorrect state: %s", 934 fst_session_state_name(s->state)); 935 return -EINVAL; 936 } 937 938 if (is_zero_ether_addr(s->data.old_peer_addr)) { 939 fst_printf_session(s, MSG_ERROR, "No peer MAC address"); 940 return -EINVAL; 941 } 942 943 if (!s->data.old_iface) { 944 fst_printf_session(s, MSG_ERROR, "No old interface defined"); 945 return -EINVAL; 946 } 947 948 if (!s->data.new_iface) { 949 fst_printf_session(s, MSG_ERROR, "No new interface defined"); 950 return -EINVAL; 951 } 952 953 if (s->data.new_iface == s->data.old_iface) { 954 fst_printf_session(s, MSG_ERROR, 955 "Same interface set as old and new"); 956 return -EINVAL; 957 } 958 959 if (!fst_iface_is_connected(s->data.old_iface, 960 s->data.old_peer_addr, FALSE)) { 961 fst_printf_session(s, MSG_ERROR, 962 "The preset peer address is not in the peer list"); 963 return -EINVAL; 964 } 965 966 fst_session_stt_disarm(s); 967 968 os_memset(&res, 0, sizeof(res)); 969 970 res.action = FST_ACTION_SETUP_RESPONSE; 971 res.dialog_token = s->data.pending_setup_req_dlgt; 972 res.status_code = status_code; 973 974 res.stie.element_id = WLAN_EID_SESSION_TRANSITION; 975 res.stie.length = sizeof(res.stie) - 2; 976 977 if (status_code == WLAN_STATUS_SUCCESS) { 978 res.stie.fsts_id = host_to_le32(s->data.fsts_id); 979 res.stie.session_control = SESSION_CONTROL(SESSION_TYPE_BSS, 0); 980 981 fst_iface_get_channel_info(s->data.new_iface, &hw_mode, 982 &channel); 983 res.stie.new_band_id = fst_hw_mode_to_band(hw_mode); 984 res.stie.new_band_op = 1; 985 res.stie.new_band_setup = 0; 986 987 fst_iface_get_channel_info(s->data.old_iface, &hw_mode, 988 &channel); 989 res.stie.old_band_id = fst_hw_mode_to_band(hw_mode); 990 res.stie.old_band_op = 1; 991 res.stie.old_band_setup = 0; 992 993 fst_printf_session(s, MSG_INFO, 994 "%s: FST Setup Request accepted for %s (llt=%u)", 995 fst_iface_get_name(s->data.old_iface), 996 fst_iface_get_name(s->data.new_iface), 997 s->data.llt_ms); 998 } else { 999 fst_printf_session(s, MSG_WARNING, 1000 "%s: FST Setup Request rejected with code %d", 1001 fst_iface_get_name(s->data.old_iface), 1002 status_code); 1003 } 1004 1005 if (fst_session_send_action(s, TRUE, &res, sizeof(res), 1006 fst_iface_get_mbie(s->data.old_iface))) { 1007 fst_printf_sframe(s, TRUE, MSG_ERROR, 1008 "cannot send FST Setup Response with code %d", 1009 status_code); 1010 return -EINVAL; 1011 } 1012 1013 fst_printf_sframe(s, TRUE, MSG_INFO, "FST Setup Response sent"); 1014 1015 if (status_code != WLAN_STATUS_SUCCESS) { 1016 union fst_session_state_switch_extra evext = { 1017 .to_initial = { 1018 .reason = REASON_REJECT, 1019 .reject_code = status_code, 1020 .initiator = FST_INITIATOR_LOCAL, 1021 }, 1022 }; 1023 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 1024 } 1025 1026 return 0; 1027} 1028 1029 1030int fst_session_initiate_switch(struct fst_session *s) 1031{ 1032 struct fst_ack_req req; 1033 int res; 1034 u8 dialog_token; 1035 1036 if (!fst_session_is_ready(s)) { 1037 fst_printf_session(s, MSG_ERROR, 1038 "cannot initiate switch due to wrong setup state (%d)", 1039 s->state); 1040 return -1; 1041 } 1042 1043 dialog_token = fst_group_assign_dialog_token(s->group); 1044 1045 WPA_ASSERT(s->data.new_iface != NULL); 1046 WPA_ASSERT(s->data.old_iface != NULL); 1047 1048 fst_printf_session(s, MSG_INFO, "initiating FST switch: %s => %s", 1049 fst_iface_get_name(s->data.old_iface), 1050 fst_iface_get_name(s->data.new_iface)); 1051 1052 os_memset(&req, 0, sizeof(req)); 1053 1054 req.action = FST_ACTION_ACK_REQUEST; 1055 req.dialog_token = dialog_token; 1056 req.fsts_id = host_to_le32(s->data.fsts_id); 1057 1058 res = fst_session_send_action(s, FALSE, &req, sizeof(req), NULL); 1059 if (!res) { 1060 fst_printf_sframe(s, FALSE, MSG_INFO, "FST Ack Request sent"); 1061 fst_session_set_state(s, FST_SESSION_STATE_TRANSITION_DONE, 1062 NULL); 1063 fst_session_stt_arm(s); 1064 } else { 1065 fst_printf_sframe(s, FALSE, MSG_ERROR, 1066 "Cannot send FST Ack Request"); 1067 } 1068 1069 return res; 1070} 1071 1072 1073void fst_session_handle_action(struct fst_session *s, 1074 struct fst_iface *iface, 1075 const struct ieee80211_mgmt *mgmt, 1076 size_t frame_len) 1077{ 1078 switch (mgmt->u.action.u.fst_action.action) { 1079 case FST_ACTION_SETUP_REQUEST: 1080 WPA_ASSERT(0); 1081 break; 1082 case FST_ACTION_SETUP_RESPONSE: 1083 fst_session_handle_setup_response(s, iface, mgmt, frame_len); 1084 break; 1085 case FST_ACTION_TEAR_DOWN: 1086 fst_session_handle_tear_down(s, iface, mgmt, frame_len); 1087 break; 1088 case FST_ACTION_ACK_REQUEST: 1089 fst_session_handle_ack_request(s, iface, mgmt, frame_len); 1090 break; 1091 case FST_ACTION_ACK_RESPONSE: 1092 fst_session_handle_ack_response(s, iface, mgmt, frame_len); 1093 break; 1094 case FST_ACTION_ON_CHANNEL_TUNNEL: 1095 default: 1096 fst_printf_sframe(s, FALSE, MSG_ERROR, 1097 "Unsupported FST Action frame"); 1098 break; 1099 } 1100} 1101 1102 1103int fst_session_tear_down_setup(struct fst_session *s) 1104{ 1105 int res; 1106 union fst_session_state_switch_extra evext = { 1107 .to_initial = { 1108 .reason = REASON_TEARDOWN, 1109 .initiator = FST_INITIATOR_LOCAL, 1110 }, 1111 }; 1112 1113 res = fst_session_send_tear_down(s); 1114 1115 fst_session_set_state(s, FST_SESSION_STATE_INITIAL, &evext); 1116 1117 return res; 1118} 1119 1120 1121void fst_session_reset(struct fst_session *s) 1122{ 1123 fst_session_reset_ex(s, REASON_RESET); 1124} 1125 1126 1127void fst_session_delete(struct fst_session *s) 1128{ 1129 fst_printf(MSG_INFO, "Session %u deleted", s->id); 1130 dl_list_del(&s->global_sessions_lentry); 1131 foreach_fst_ctrl_call(on_session_removed, s); 1132 os_free(s); 1133} 1134 1135 1136struct fst_group * fst_session_get_group(struct fst_session *s) 1137{ 1138 return s->group; 1139} 1140 1141 1142struct fst_iface * fst_session_get_iface(struct fst_session *s, Boolean is_old) 1143{ 1144 return is_old ? s->data.old_iface : s->data.new_iface; 1145} 1146 1147 1148u32 fst_session_get_id(struct fst_session *s) 1149{ 1150 return s->id; 1151} 1152 1153 1154const u8 * fst_session_get_peer_addr(struct fst_session *s, Boolean is_old) 1155{ 1156 return is_old ? s->data.old_peer_addr : s->data.new_peer_addr; 1157} 1158 1159 1160u32 fst_session_get_llt(struct fst_session *s) 1161{ 1162 return s->data.llt_ms; 1163} 1164 1165 1166enum fst_session_state fst_session_get_state(struct fst_session *s) 1167{ 1168 return s->state; 1169} 1170 1171 1172struct fst_session * fst_session_get_by_id(u32 id) 1173{ 1174 struct fst_session *s; 1175 1176 foreach_fst_session(s) { 1177 if (id == s->id) 1178 return s; 1179 } 1180 1181 return NULL; 1182} 1183 1184 1185void fst_session_enum(struct fst_group *g, fst_session_enum_clb clb, void *ctx) 1186{ 1187 struct fst_session *s; 1188 1189 foreach_fst_session(s) { 1190 if (!g || s->group == g) 1191 clb(s->group, s, ctx); 1192 } 1193} 1194 1195 1196void fst_session_on_action_rx(struct fst_iface *iface, 1197 const struct ieee80211_mgmt *mgmt, 1198 size_t len) 1199{ 1200 struct fst_session *s; 1201 1202 if (len < IEEE80211_HDRLEN + 2 || 1203 mgmt->u.action.category != WLAN_ACTION_FST) { 1204 fst_printf_iface(iface, MSG_ERROR, 1205 "invalid Action frame received"); 1206 return; 1207 } 1208 1209 if (mgmt->u.action.u.fst_action.action <= FST_ACTION_MAX_SUPPORTED) { 1210 fst_printf_iface(iface, MSG_DEBUG, 1211 "FST Action '%s' received!", 1212 fst_action_names[mgmt->u.action.u.fst_action.action]); 1213 } else { 1214 fst_printf_iface(iface, MSG_WARNING, 1215 "unknown FST Action (%u) received!", 1216 mgmt->u.action.u.fst_action.action); 1217 return; 1218 } 1219 1220 if (mgmt->u.action.u.fst_action.action == FST_ACTION_SETUP_REQUEST) { 1221 fst_session_handle_setup_request(iface, mgmt, len); 1222 return; 1223 } 1224 1225 s = fst_find_session_in_progress(mgmt->sa, fst_iface_get_group(iface)); 1226 if (s) { 1227 fst_session_handle_action(s, iface, mgmt, len); 1228 } else { 1229 fst_printf_iface(iface, MSG_WARNING, 1230 "FST Action '%s' dropped: no session in progress found", 1231 fst_action_names[mgmt->u.action.u.fst_action.action]); 1232 } 1233} 1234 1235 1236int fst_session_set_str_ifname(struct fst_session *s, const char *ifname, 1237 Boolean is_old) 1238{ 1239 struct fst_group *g = fst_session_get_group(s); 1240 struct fst_iface *i; 1241 1242 i = fst_group_get_iface_by_name(g, ifname); 1243 if (!i) { 1244 fst_printf_session(s, MSG_WARNING, 1245 "Cannot set iface %s: no such iface within group '%s'", 1246 ifname, fst_group_get_id(g)); 1247 return -1; 1248 } 1249 1250 fst_session_set_iface(s, i, is_old); 1251 1252 return 0; 1253} 1254 1255 1256int fst_session_set_str_peer_addr(struct fst_session *s, const char *mac, 1257 Boolean is_old) 1258{ 1259 u8 peer_addr[ETH_ALEN]; 1260 int res = fst_read_peer_addr(mac, peer_addr); 1261 1262 if (res) 1263 return res; 1264 1265 fst_session_set_peer_addr(s, peer_addr, is_old); 1266 1267 return 0; 1268} 1269 1270 1271int fst_session_set_str_llt(struct fst_session *s, const char *llt_str) 1272{ 1273 char *endp; 1274 long int llt = strtol(llt_str, &endp, 0); 1275 1276 if (*endp || llt < 0 || (unsigned long int) llt > FST_MAX_LLT_MS) { 1277 fst_printf_session(s, MSG_WARNING, 1278 "Cannot set llt %s: Invalid llt value (1..%u expected)", 1279 llt_str, FST_MAX_LLT_MS); 1280 return -1; 1281 } 1282 fst_session_set_llt(s, (u32) llt); 1283 1284 return 0; 1285} 1286 1287 1288void fst_session_global_on_iface_detached(struct fst_iface *iface) 1289{ 1290 struct fst_session *s; 1291 1292 foreach_fst_session(s) { 1293 if (fst_session_is_in_progress(s) && 1294 (s->data.new_iface == iface || 1295 s->data.old_iface == iface)) 1296 fst_session_reset_ex(s, REASON_DETACH_IFACE); 1297 } 1298} 1299 1300 1301struct fst_session * fst_session_global_get_first_by_group(struct fst_group *g) 1302{ 1303 struct fst_session *s; 1304 1305 foreach_fst_session(s) { 1306 if (s->group == g) 1307 return s; 1308 } 1309 1310 return NULL; 1311} 1312 1313 1314#ifdef CONFIG_FST_TEST 1315 1316static int get_group_fill_session(struct fst_group **g, struct fst_session *s) 1317{ 1318 const u8 *old_addr, *new_addr; 1319 struct fst_get_peer_ctx *ctx; 1320 1321 os_memset(s, 0, sizeof(*s)); 1322 foreach_fst_group(*g) { 1323 s->data.new_iface = fst_group_first_iface(*g); 1324 if (s->data.new_iface) 1325 break; 1326 } 1327 if (!s->data.new_iface) 1328 return -EINVAL; 1329 1330 s->data.old_iface = dl_list_entry(s->data.new_iface->group_lentry.next, 1331 struct fst_iface, group_lentry); 1332 if (!s->data.old_iface) 1333 return -EINVAL; 1334 1335 old_addr = fst_iface_get_peer_first(s->data.old_iface, &ctx, TRUE); 1336 if (!old_addr) 1337 return -EINVAL; 1338 1339 new_addr = fst_iface_get_peer_first(s->data.new_iface, &ctx, TRUE); 1340 if (!new_addr) 1341 return -EINVAL; 1342 1343 os_memcpy(s->data.old_peer_addr, old_addr, ETH_ALEN); 1344 os_memcpy(s->data.new_peer_addr, new_addr, ETH_ALEN); 1345 1346 return 0; 1347} 1348 1349 1350#define FST_MAX_COMMAND_WORD_NAME_LENGTH 16 1351 1352int fst_test_req_send_fst_request(const char *params) 1353{ 1354 int fsts_id; 1355 Boolean is_valid; 1356 char *endp; 1357 struct fst_setup_req req; 1358 struct fst_session s; 1359 struct fst_group *g; 1360 enum hostapd_hw_mode hw_mode; 1361 u8 channel; 1362 char additional_param[FST_MAX_COMMAND_WORD_NAME_LENGTH]; 1363 1364 if (params[0] != ' ') 1365 return -EINVAL; 1366 params++; 1367 fsts_id = fst_read_next_int_param(params, &is_valid, &endp); 1368 if (!is_valid) 1369 return -EINVAL; 1370 1371 if (get_group_fill_session(&g, &s)) 1372 return -EINVAL; 1373 1374 req.action = FST_ACTION_SETUP_REQUEST; 1375 req.dialog_token = g->dialog_token; 1376 req.llt = host_to_le32(FST_LLT_MS_DEFAULT); 1377 /* 8.4.2.147 Session Transition element */ 1378 req.stie.element_id = WLAN_EID_SESSION_TRANSITION; 1379 req.stie.length = sizeof(req.stie) - 2; 1380 req.stie.fsts_id = host_to_le32(fsts_id); 1381 req.stie.session_control = SESSION_CONTROL(SESSION_TYPE_BSS, 0); 1382 1383 fst_iface_get_channel_info(s.data.new_iface, &hw_mode, &channel); 1384 req.stie.new_band_id = fst_hw_mode_to_band(hw_mode); 1385 req.stie.new_band_op = 1; 1386 req.stie.new_band_setup = 0; 1387 1388 fst_iface_get_channel_info(s.data.old_iface, &hw_mode, &channel); 1389 req.stie.old_band_id = fst_hw_mode_to_band(hw_mode); 1390 req.stie.old_band_op = 1; 1391 req.stie.old_band_setup = 0; 1392 1393 if (!fst_read_next_text_param(endp, additional_param, 1394 sizeof(additional_param), &endp)) { 1395 if (!os_strcasecmp(additional_param, FST_CTR_PVAL_BAD_NEW_BAND)) 1396 req.stie.new_band_id = req.stie.old_band_id; 1397 } 1398 1399 return fst_session_send_action(&s, TRUE, &req, sizeof(req), 1400 s.data.old_iface->mb_ie); 1401} 1402 1403 1404int fst_test_req_send_fst_response(const char *params) 1405{ 1406 int fsts_id; 1407 Boolean is_valid; 1408 char *endp; 1409 struct fst_setup_res res; 1410 struct fst_session s; 1411 struct fst_group *g; 1412 enum hostapd_hw_mode hw_mode; 1413 u8 status_code; 1414 u8 channel; 1415 char response[FST_MAX_COMMAND_WORD_NAME_LENGTH]; 1416 struct fst_session *_s; 1417 1418 if (params[0] != ' ') 1419 return -EINVAL; 1420 params++; 1421 fsts_id = fst_read_next_int_param(params, &is_valid, &endp); 1422 if (!is_valid) 1423 return -EINVAL; 1424 1425 if (get_group_fill_session(&g, &s)) 1426 return -EINVAL; 1427 1428 status_code = WLAN_STATUS_SUCCESS; 1429 if (!fst_read_next_text_param(endp, response, sizeof(response), 1430 &endp)) { 1431 if (!os_strcasecmp(response, FST_CS_PVAL_RESPONSE_REJECT)) 1432 status_code = WLAN_STATUS_PENDING_ADMITTING_FST_SESSION; 1433 } 1434 1435 os_memset(&res, 0, sizeof(res)); 1436 1437 res.action = FST_ACTION_SETUP_RESPONSE; 1438 /* 1439 * If some session has just received an FST Setup Request, then 1440 * use the correct dialog token copied from this request. 1441 */ 1442 _s = fst_find_session_in_progress(fst_session_get_peer_addr(&s, TRUE), 1443 g); 1444 res.dialog_token = (_s && fst_session_is_ready_pending(_s)) ? 1445 _s->data.pending_setup_req_dlgt : g->dialog_token; 1446 res.status_code = status_code; 1447 1448 res.stie.element_id = WLAN_EID_SESSION_TRANSITION; 1449 res.stie.length = sizeof(res.stie) - 2; 1450 1451 if (res.status_code == WLAN_STATUS_SUCCESS) { 1452 res.stie.fsts_id = host_to_le32(fsts_id); 1453 res.stie.session_control = SESSION_CONTROL(SESSION_TYPE_BSS, 0); 1454 1455 fst_iface_get_channel_info(s.data.new_iface, &hw_mode, 1456 &channel); 1457 res.stie.new_band_id = fst_hw_mode_to_band(hw_mode); 1458 res.stie.new_band_op = 1; 1459 res.stie.new_band_setup = 0; 1460 1461 fst_iface_get_channel_info(s.data.old_iface, &hw_mode, 1462 &channel); 1463 res.stie.old_band_id = fst_hw_mode_to_band(hw_mode); 1464 res.stie.old_band_op = 1; 1465 res.stie.old_band_setup = 0; 1466 } 1467 1468 if (!fst_read_next_text_param(endp, response, sizeof(response), 1469 &endp)) { 1470 if (!os_strcasecmp(response, FST_CTR_PVAL_BAD_NEW_BAND)) 1471 res.stie.new_band_id = res.stie.old_band_id; 1472 } 1473 1474 return fst_session_send_action(&s, TRUE, &res, sizeof(res), 1475 s.data.old_iface->mb_ie); 1476} 1477 1478 1479int fst_test_req_send_ack_request(const char *params) 1480{ 1481 int fsts_id; 1482 Boolean is_valid; 1483 char *endp; 1484 struct fst_ack_req req; 1485 struct fst_session s; 1486 struct fst_group *g; 1487 1488 if (params[0] != ' ') 1489 return -EINVAL; 1490 params++; 1491 fsts_id = fst_read_next_int_param(params, &is_valid, &endp); 1492 if (!is_valid) 1493 return -EINVAL; 1494 1495 if (get_group_fill_session(&g, &s)) 1496 return -EINVAL; 1497 1498 os_memset(&req, 0, sizeof(req)); 1499 req.action = FST_ACTION_ACK_REQUEST; 1500 req.dialog_token = g->dialog_token; 1501 req.fsts_id = host_to_le32(fsts_id); 1502 1503 return fst_session_send_action(&s, FALSE, &req, sizeof(req), NULL); 1504} 1505 1506 1507int fst_test_req_send_ack_response(const char *params) 1508{ 1509 int fsts_id; 1510 Boolean is_valid; 1511 char *endp; 1512 struct fst_ack_res res; 1513 struct fst_session s; 1514 struct fst_group *g; 1515 1516 if (params[0] != ' ') 1517 return -EINVAL; 1518 params++; 1519 fsts_id = fst_read_next_int_param(params, &is_valid, &endp); 1520 if (!is_valid) 1521 return -EINVAL; 1522 1523 if (get_group_fill_session(&g, &s)) 1524 return -EINVAL; 1525 1526 os_memset(&res, 0, sizeof(res)); 1527 res.action = FST_ACTION_ACK_RESPONSE; 1528 res.dialog_token = g->dialog_token; 1529 res.fsts_id = host_to_le32(fsts_id); 1530 1531 return fst_session_send_action(&s, FALSE, &res, sizeof(res), NULL); 1532} 1533 1534 1535int fst_test_req_send_tear_down(const char *params) 1536{ 1537 int fsts_id; 1538 Boolean is_valid; 1539 char *endp; 1540 struct fst_tear_down td; 1541 struct fst_session s; 1542 struct fst_group *g; 1543 1544 if (params[0] != ' ') 1545 return -EINVAL; 1546 params++; 1547 fsts_id = fst_read_next_int_param(params, &is_valid, &endp); 1548 if (!is_valid) 1549 return -EINVAL; 1550 1551 if (get_group_fill_session(&g, &s)) 1552 return -EINVAL; 1553 1554 os_memset(&td, 0, sizeof(td)); 1555 td.action = FST_ACTION_TEAR_DOWN; 1556 td.fsts_id = host_to_le32(fsts_id); 1557 1558 return fst_session_send_action(&s, TRUE, &td, sizeof(td), NULL); 1559} 1560 1561 1562u32 fst_test_req_get_fsts_id(const char *params) 1563{ 1564 int sid; 1565 Boolean is_valid; 1566 char *endp; 1567 struct fst_session *s; 1568 1569 if (params[0] != ' ') 1570 return FST_FSTS_ID_NOT_FOUND; 1571 params++; 1572 sid = fst_read_next_int_param(params, &is_valid, &endp); 1573 if (!is_valid) 1574 return FST_FSTS_ID_NOT_FOUND; 1575 1576 s = fst_session_get_by_id(sid); 1577 if (!s) 1578 return FST_FSTS_ID_NOT_FOUND; 1579 1580 return s->data.fsts_id; 1581} 1582 1583 1584int fst_test_req_get_local_mbies(const char *request, char *buf, size_t buflen) 1585{ 1586 char *endp; 1587 char ifname[FST_MAX_COMMAND_WORD_NAME_LENGTH]; 1588 struct fst_group *g; 1589 struct fst_iface *iface; 1590 1591 if (request[0] != ' ') 1592 return -EINVAL; 1593 request++; 1594 if (fst_read_next_text_param(request, ifname, sizeof(ifname), &endp) || 1595 !*ifname) 1596 goto problem; 1597 g = dl_list_first(&fst_global_groups_list, struct fst_group, 1598 global_groups_lentry); 1599 if (!g) 1600 goto problem; 1601 iface = fst_group_get_iface_by_name(g, ifname); 1602 if (!iface || !iface->mb_ie) 1603 goto problem; 1604 return wpa_snprintf_hex(buf, buflen, wpabuf_head(iface->mb_ie), 1605 wpabuf_len(iface->mb_ie)); 1606 1607problem: 1608 return os_snprintf(buf, buflen, "FAIL\n"); 1609} 1610 1611#endif /* CONFIG_FST_TEST */ 1612