1 /* 2 * WPA Supplicant - Basic mesh peer management 3 * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved. 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 "ap/hostapd.h" 15 #include "ap/sta_info.h" 16 #include "ap/ieee802_11.h" 17 #include "ap/wpa_auth.h" 18 #include "wpa_supplicant_i.h" 19 #include "driver_i.h" 20 #include "mesh_mpm.h" 21 #include "mesh_rsn.h" 22 23 struct mesh_peer_mgmt_ie { 24 const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */ 25 const u8 *llid; /* Local Link ID (2 octets) */ 26 const u8 *plid; /* Peer Link ID (conditional, 2 octets) */ 27 const u8 *reason; /* Reason Code (conditional, 2 octets) */ 28 const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */ 29 }; 30 31 static void plink_timer(void *eloop_ctx, void *user_data); 32 33 34 enum plink_event { 35 PLINK_UNDEFINED, 36 OPN_ACPT, 37 OPN_RJCT, 38 CNF_ACPT, 39 CNF_RJCT, 40 CLS_ACPT, 41 REQ_RJCT 42 }; 43 44 static const char * const mplstate[] = { 45 [0] = "UNINITIALIZED", 46 [PLINK_IDLE] = "IDLE", 47 [PLINK_OPN_SNT] = "OPN_SNT", 48 [PLINK_OPN_RCVD] = "OPN_RCVD", 49 [PLINK_CNF_RCVD] = "CNF_RCVD", 50 [PLINK_ESTAB] = "ESTAB", 51 [PLINK_HOLDING] = "HOLDING", 52 [PLINK_BLOCKED] = "BLOCKED" 53 }; 54 55 static const char * const mplevent[] = { 56 [PLINK_UNDEFINED] = "UNDEFINED", 57 [OPN_ACPT] = "OPN_ACPT", 58 [OPN_RJCT] = "OPN_RJCT", 59 [CNF_ACPT] = "CNF_ACPT", 60 [CNF_RJCT] = "CNF_RJCT", 61 [CLS_ACPT] = "CLS_ACPT", 62 [REQ_RJCT] = "REQ_RJCT", 63 }; 64 65 66 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s, 67 u8 action_field, 68 const u8 *ie, size_t len, 69 struct mesh_peer_mgmt_ie *mpm_ie) 70 { 71 os_memset(mpm_ie, 0, sizeof(*mpm_ie)); 72 73 /* Remove optional Chosen PMK field at end */ 74 if (len >= SAE_PMKID_LEN) { 75 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN; 76 len -= SAE_PMKID_LEN; 77 } 78 79 if ((action_field == PLINK_OPEN && len != 4) || 80 (action_field == PLINK_CONFIRM && len != 6) || 81 (action_field == PLINK_CLOSE && len != 6 && len != 8)) { 82 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie"); 83 return -1; 84 } 85 86 /* required fields */ 87 if (len < 4) 88 return -1; 89 mpm_ie->proto_id = ie; 90 mpm_ie->llid = ie + 2; 91 ie += 4; 92 len -= 4; 93 94 /* close reason is always present at end for close */ 95 if (action_field == PLINK_CLOSE) { 96 if (len < 2) 97 return -1; 98 mpm_ie->reason = ie + len - 2; 99 len -= 2; 100 } 101 102 /* Peer Link ID, present for confirm, and possibly close */ 103 if (len >= 2) 104 mpm_ie->plid = ie; 105 106 return 0; 107 } 108 109 110 static int plink_free_count(struct hostapd_data *hapd) 111 { 112 if (hapd->max_plinks > hapd->num_plinks) 113 return hapd->max_plinks - hapd->num_plinks; 114 return 0; 115 } 116 117 118 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s, 119 struct sta_info *sta, 120 struct ieee802_11_elems *elems) 121 { 122 if (!elems->supp_rates) { 123 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR, 124 MAC2STR(sta->addr)); 125 return WLAN_STATUS_UNSPECIFIED_FAILURE; 126 } 127 128 if (elems->supp_rates_len + elems->ext_supp_rates_len > 129 sizeof(sta->supported_rates)) { 130 wpa_msg(wpa_s, MSG_ERROR, 131 "Invalid supported rates element length " MACSTR 132 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len, 133 elems->ext_supp_rates_len); 134 return WLAN_STATUS_UNSPECIFIED_FAILURE; 135 } 136 137 sta->supported_rates_len = merge_byte_arrays( 138 sta->supported_rates, sizeof(sta->supported_rates), 139 elems->supp_rates, elems->supp_rates_len, 140 elems->ext_supp_rates, elems->ext_supp_rates_len); 141 142 return WLAN_STATUS_SUCCESS; 143 } 144 145 146 /* return true if elems from a neighbor match this MBSS */ 147 static Boolean matches_local(struct wpa_supplicant *wpa_s, 148 struct ieee802_11_elems *elems) 149 { 150 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 151 152 if (elems->mesh_config_len < 5) 153 return FALSE; 154 155 return (mconf->meshid_len == elems->mesh_id_len && 156 os_memcmp(mconf->meshid, elems->mesh_id, 157 elems->mesh_id_len) == 0 && 158 mconf->mesh_pp_id == elems->mesh_config[0] && 159 mconf->mesh_pm_id == elems->mesh_config[1] && 160 mconf->mesh_cc_id == elems->mesh_config[2] && 161 mconf->mesh_sp_id == elems->mesh_config[3] && 162 mconf->mesh_auth_id == elems->mesh_config[4]); 163 } 164 165 166 /* check if local link id is already used with another peer */ 167 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid) 168 { 169 struct sta_info *sta; 170 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 171 172 for (sta = hapd->sta_list; sta; sta = sta->next) { 173 if (sta->my_lid == llid) 174 return TRUE; 175 } 176 177 return FALSE; 178 } 179 180 181 /* generate an llid for a link and set to initial state */ 182 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s, 183 struct sta_info *sta) 184 { 185 u16 llid; 186 187 do { 188 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0) 189 continue; 190 } while (!llid || llid_in_use(wpa_s, llid)); 191 192 sta->my_lid = llid; 193 sta->peer_lid = 0; 194 sta->peer_aid = 0; 195 196 /* 197 * We do not use wpa_mesh_set_plink_state() here because there is no 198 * entry in kernel yet. 199 */ 200 sta->plink_state = PLINK_IDLE; 201 } 202 203 204 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s, 205 struct sta_info *sta, 206 enum plink_action_field type, 207 u16 close_reason) 208 { 209 struct wpabuf *buf; 210 struct hostapd_iface *ifmsh = wpa_s->ifmsh; 211 struct hostapd_data *bss = ifmsh->bss[0]; 212 struct mesh_conf *conf = ifmsh->mconf; 213 u8 supp_rates[2 + 2 + 32]; 214 u8 *pos, *cat; 215 u8 ie_len, add_plid = 0; 216 int ret; 217 int ampe = conf->security & MESH_CONF_SEC_AMPE; 218 size_t buf_len; 219 220 if (!sta) 221 return; 222 223 buf_len = 2 + /* capability info */ 224 2 + /* AID */ 225 2 + 8 + /* supported rates */ 226 2 + (32 - 8) + 227 2 + 32 + /* mesh ID */ 228 2 + 7 + /* mesh config */ 229 2 + 23 + /* peering management */ 230 2 + 96 + /* AMPE */ 231 2 + 16; /* MIC */ 232 #ifdef CONFIG_IEEE80211N 233 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 234 buf_len += 2 + 26 + /* HT capabilities */ 235 2 + 22; /* HT operation */ 236 } 237 #endif /* CONFIG_IEEE80211N */ 238 #ifdef CONFIG_IEEE80211AC 239 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 240 buf_len += 2 + 12 + /* VHT Capabilities */ 241 2 + 5; /* VHT Operation */ 242 } 243 #endif /* CONFIG_IEEE80211AC */ 244 if (type != PLINK_CLOSE) 245 buf_len += conf->rsn_ie_len; /* RSN IE */ 246 247 buf = wpabuf_alloc(buf_len); 248 if (!buf) 249 return; 250 251 cat = wpabuf_mhead_u8(buf); 252 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED); 253 wpabuf_put_u8(buf, type); 254 255 if (type != PLINK_CLOSE) { 256 u8 info; 257 258 /* capability info */ 259 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0); 260 261 /* aid */ 262 if (type == PLINK_CONFIRM) 263 wpabuf_put_le16(buf, sta->aid); 264 265 /* IE: supp + ext. supp rates */ 266 pos = hostapd_eid_supp_rates(bss, supp_rates); 267 pos = hostapd_eid_ext_supp_rates(bss, pos); 268 wpabuf_put_data(buf, supp_rates, pos - supp_rates); 269 270 /* IE: RSN IE */ 271 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len); 272 273 /* IE: Mesh ID */ 274 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 275 wpabuf_put_u8(buf, conf->meshid_len); 276 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 277 278 /* IE: mesh conf */ 279 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG); 280 wpabuf_put_u8(buf, 7); 281 wpabuf_put_u8(buf, conf->mesh_pp_id); 282 wpabuf_put_u8(buf, conf->mesh_pm_id); 283 wpabuf_put_u8(buf, conf->mesh_cc_id); 284 wpabuf_put_u8(buf, conf->mesh_sp_id); 285 wpabuf_put_u8(buf, conf->mesh_auth_id); 286 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1; 287 /* TODO: Add Connected to Mesh Gate/AS subfields */ 288 wpabuf_put_u8(buf, info); 289 /* always forwarding & accepting plinks for now */ 290 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER | 291 MESH_CAP_FORWARDING); 292 } else { /* Peer closing frame */ 293 /* IE: Mesh ID */ 294 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 295 wpabuf_put_u8(buf, conf->meshid_len); 296 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 297 } 298 299 /* IE: Mesh Peering Management element */ 300 ie_len = 4; 301 if (ampe) 302 ie_len += PMKID_LEN; 303 switch (type) { 304 case PLINK_OPEN: 305 break; 306 case PLINK_CONFIRM: 307 ie_len += 2; 308 add_plid = 1; 309 break; 310 case PLINK_CLOSE: 311 ie_len += 2; 312 add_plid = 1; 313 ie_len += 2; /* reason code */ 314 break; 315 } 316 317 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT); 318 wpabuf_put_u8(buf, ie_len); 319 /* peering protocol */ 320 if (ampe) 321 wpabuf_put_le16(buf, 1); 322 else 323 wpabuf_put_le16(buf, 0); 324 wpabuf_put_le16(buf, sta->my_lid); 325 if (add_plid) 326 wpabuf_put_le16(buf, sta->peer_lid); 327 if (type == PLINK_CLOSE) 328 wpabuf_put_le16(buf, close_reason); 329 if (ampe) { 330 if (sta->sae == NULL) { 331 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session"); 332 goto fail; 333 } 334 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta, 335 wpabuf_put(buf, PMKID_LEN)); 336 } 337 338 #ifdef CONFIG_IEEE80211N 339 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 340 u8 ht_capa_oper[2 + 26 + 2 + 22]; 341 342 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper); 343 pos = hostapd_eid_ht_operation(bss, pos); 344 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper); 345 } 346 #endif /* CONFIG_IEEE80211N */ 347 #ifdef CONFIG_IEEE80211AC 348 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 349 u8 vht_capa_oper[2 + 12 + 2 + 5]; 350 351 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0); 352 pos = hostapd_eid_vht_operation(bss, pos); 353 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper); 354 } 355 #endif /* CONFIG_IEEE80211AC */ 356 357 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) { 358 wpa_msg(wpa_s, MSG_INFO, 359 "Mesh MPM: failed to add AMPE and MIC IE"); 360 goto fail; 361 } 362 363 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to " 364 MACSTR " (my_lid=0x%x peer_lid=0x%x)", 365 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid); 366 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, 367 sta->addr, wpa_s->own_addr, wpa_s->own_addr, 368 wpabuf_head(buf), wpabuf_len(buf), 0); 369 if (ret < 0) 370 wpa_msg(wpa_s, MSG_INFO, 371 "Mesh MPM: failed to send peering frame"); 372 373 fail: 374 wpabuf_free(buf); 375 } 376 377 378 /* configure peering state in ours and driver's station entry */ 379 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, 380 struct sta_info *sta, 381 enum mesh_plink_state state) 382 { 383 struct hostapd_sta_add_params params; 384 int ret; 385 386 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s", 387 MAC2STR(sta->addr), mplstate[sta->plink_state], 388 mplstate[state]); 389 sta->plink_state = state; 390 391 os_memset(¶ms, 0, sizeof(params)); 392 params.addr = sta->addr; 393 params.plink_state = state; 394 params.peer_aid = sta->peer_aid; 395 params.set = 1; 396 397 ret = wpa_drv_sta_add(wpa_s, ¶ms); 398 if (ret) { 399 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR 400 ": %d", MAC2STR(sta->addr), ret); 401 } 402 } 403 404 405 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s, 406 struct sta_info *sta) 407 { 408 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 409 410 eloop_cancel_timeout(plink_timer, wpa_s, sta); 411 412 ap_free_sta(hapd, sta); 413 } 414 415 416 static void plink_timer(void *eloop_ctx, void *user_data) 417 { 418 struct wpa_supplicant *wpa_s = eloop_ctx; 419 struct sta_info *sta = user_data; 420 u16 reason = 0; 421 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 422 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 423 424 switch (sta->plink_state) { 425 case PLINK_OPN_RCVD: 426 case PLINK_OPN_SNT: 427 /* retry timer */ 428 if (sta->mpm_retries < conf->dot11MeshMaxRetries) { 429 eloop_register_timeout( 430 conf->dot11MeshRetryTimeout / 1000, 431 (conf->dot11MeshRetryTimeout % 1000) * 1000, 432 plink_timer, wpa_s, sta); 433 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 434 sta->mpm_retries++; 435 break; 436 } 437 reason = WLAN_REASON_MESH_MAX_RETRIES; 438 /* fall through on else */ 439 440 case PLINK_CNF_RCVD: 441 /* confirm timer */ 442 if (!reason) 443 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT; 444 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 445 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000, 446 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 447 plink_timer, wpa_s, sta); 448 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 449 break; 450 case PLINK_HOLDING: 451 /* holding timer */ 452 453 if (sta->mesh_sae_pmksa_caching) { 454 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR 455 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it", 456 MAC2STR(sta->addr)); 457 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 458 } 459 mesh_mpm_fsm_restart(wpa_s, sta); 460 break; 461 default: 462 break; 463 } 464 } 465 466 467 /* initiate peering with station */ 468 static void 469 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta, 470 enum mesh_plink_state next_state) 471 { 472 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 473 474 eloop_cancel_timeout(plink_timer, wpa_s, sta); 475 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000, 476 (conf->dot11MeshRetryTimeout % 1000) * 1000, 477 plink_timer, wpa_s, sta); 478 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 479 wpa_mesh_set_plink_state(wpa_s, sta, next_state); 480 } 481 482 483 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta, 484 void *ctx) 485 { 486 struct wpa_supplicant *wpa_s = ctx; 487 int reason = WLAN_REASON_MESH_PEERING_CANCELLED; 488 489 if (sta) { 490 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 491 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 492 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR, 493 MAC2STR(sta->addr)); 494 eloop_cancel_timeout(plink_timer, wpa_s, sta); 495 return 0; 496 } 497 498 return 1; 499 } 500 501 502 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 503 { 504 struct hostapd_data *hapd; 505 struct sta_info *sta; 506 507 if (!wpa_s->ifmsh) { 508 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 509 return -1; 510 } 511 512 hapd = wpa_s->ifmsh->bss[0]; 513 sta = ap_get_sta(hapd, addr); 514 if (!sta) { 515 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 516 return -1; 517 } 518 519 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1; 520 } 521 522 523 static void peer_add_timer(void *eloop_ctx, void *user_data) 524 { 525 struct wpa_supplicant *wpa_s = eloop_ctx; 526 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 527 528 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN); 529 } 530 531 532 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 533 int duration) 534 { 535 struct wpa_ssid *ssid = wpa_s->current_ssid; 536 struct hostapd_data *hapd; 537 struct sta_info *sta; 538 struct mesh_conf *conf; 539 540 if (!wpa_s->ifmsh) { 541 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 542 return -1; 543 } 544 545 if (!ssid || !ssid->no_auto_peer) { 546 wpa_msg(wpa_s, MSG_INFO, 547 "This command is available only with no_auto_peer mesh network"); 548 return -1; 549 } 550 551 hapd = wpa_s->ifmsh->bss[0]; 552 conf = wpa_s->ifmsh->mconf; 553 554 sta = ap_get_sta(hapd, addr); 555 if (!sta) { 556 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 557 return -1; 558 } 559 560 if ((PLINK_OPN_SNT <= sta->plink_state && 561 sta->plink_state <= PLINK_ESTAB) || 562 (sta->sae && sta->sae->state > SAE_NOTHING)) { 563 wpa_msg(wpa_s, MSG_INFO, 564 "Specified peer is connecting/connected"); 565 return -1; 566 } 567 568 if (conf->security == MESH_CONF_SEC_NONE) { 569 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 570 } else { 571 mesh_rsn_auth_sae_sta(wpa_s, sta); 572 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN); 573 eloop_register_timeout(duration == -1 ? 10 : duration, 0, 574 peer_add_timer, wpa_s, NULL); 575 } 576 577 return 0; 578 } 579 580 581 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh) 582 { 583 struct hostapd_data *hapd = ifmsh->bss[0]; 584 585 /* notify peers we're leaving */ 586 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s); 587 588 hapd->num_plinks = 0; 589 hostapd_free_stas(hapd); 590 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 591 } 592 593 594 /* for mesh_rsn to indicate this peer has completed authentication, and we're 595 * ready to start AMPE */ 596 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 597 { 598 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 599 struct hostapd_sta_add_params params; 600 struct sta_info *sta; 601 int ret; 602 603 sta = ap_get_sta(data, addr); 604 if (!sta) { 605 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer"); 606 return; 607 } 608 609 /* TODO: Should do nothing if this STA is already authenticated, but 610 * the AP code already sets this flag. */ 611 sta->flags |= WLAN_STA_AUTH; 612 613 mesh_rsn_init_ampe_sta(wpa_s, sta); 614 615 os_memset(¶ms, 0, sizeof(params)); 616 params.addr = sta->addr; 617 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED; 618 params.set = 1; 619 620 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR, 621 MAC2STR(sta->addr)); 622 ret = wpa_drv_sta_add(wpa_s, ¶ms); 623 if (ret) { 624 wpa_msg(wpa_s, MSG_ERROR, 625 "Driver failed to set " MACSTR ": %d", 626 MAC2STR(sta->addr), ret); 627 } 628 629 if (!sta->my_lid) 630 mesh_mpm_init_link(wpa_s, sta); 631 632 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 633 } 634 635 /* 636 * Initialize a sta_info structure for a peer and upload it into the driver 637 * in preparation for beginning authentication or peering. This is done when a 638 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is 639 * received from the peer for the first time. 640 */ 641 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s, 642 const u8 *addr, 643 struct ieee802_11_elems *elems) 644 { 645 struct hostapd_sta_add_params params; 646 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 647 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 648 struct sta_info *sta; 649 int ret; 650 651 if (elems->mesh_config_len >= 7 && 652 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) { 653 wpa_msg(wpa_s, MSG_DEBUG, 654 "mesh: Ignore a crowded peer " MACSTR, 655 MAC2STR(addr)); 656 return NULL; 657 } 658 659 sta = ap_get_sta(data, addr); 660 if (!sta) { 661 sta = ap_sta_add(data, addr); 662 if (!sta) 663 return NULL; 664 } 665 666 /* Set WMM by default since Mesh STAs are QoS STAs */ 667 sta->flags |= WLAN_STA_WMM; 668 669 /* initialize sta */ 670 if (copy_supp_rates(wpa_s, sta, elems)) { 671 ap_free_sta(data, sta); 672 return NULL; 673 } 674 675 if (!sta->my_lid) 676 mesh_mpm_init_link(wpa_s, sta); 677 678 #ifdef CONFIG_IEEE80211N 679 copy_sta_ht_capab(data, sta, elems->ht_capabilities); 680 update_ht_state(data, sta); 681 #endif /* CONFIG_IEEE80211N */ 682 683 #ifdef CONFIG_IEEE80211AC 684 copy_sta_vht_capab(data, sta, elems->vht_capabilities); 685 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif); 686 #endif /* CONFIG_IEEE80211AC */ 687 688 if (hostapd_get_aid(data, sta) < 0) { 689 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available"); 690 ap_free_sta(data, sta); 691 return NULL; 692 } 693 694 /* insert into driver */ 695 os_memset(¶ms, 0, sizeof(params)); 696 params.supp_rates = sta->supported_rates; 697 params.supp_rates_len = sta->supported_rates_len; 698 params.addr = addr; 699 params.plink_state = sta->plink_state; 700 params.aid = sta->aid; 701 params.peer_aid = sta->peer_aid; 702 params.listen_interval = 100; 703 params.ht_capabilities = sta->ht_capabilities; 704 params.vht_capabilities = sta->vht_capabilities; 705 params.flags |= WPA_STA_WMM; 706 params.flags_mask |= WPA_STA_AUTHENTICATED; 707 if (conf->security == MESH_CONF_SEC_NONE) { 708 params.flags |= WPA_STA_AUTHORIZED; 709 params.flags |= WPA_STA_AUTHENTICATED; 710 } else { 711 sta->flags |= WLAN_STA_MFP; 712 params.flags |= WPA_STA_MFP; 713 } 714 715 ret = wpa_drv_sta_add(wpa_s, ¶ms); 716 if (ret) { 717 wpa_msg(wpa_s, MSG_ERROR, 718 "Driver failed to insert " MACSTR ": %d", 719 MAC2STR(addr), ret); 720 ap_free_sta(data, sta); 721 return NULL; 722 } 723 724 return sta; 725 } 726 727 728 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 729 struct ieee802_11_elems *elems) 730 { 731 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 732 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 733 struct sta_info *sta; 734 struct wpa_ssid *ssid = wpa_s->current_ssid; 735 736 sta = mesh_mpm_add_peer(wpa_s, addr, elems); 737 if (!sta) 738 return; 739 740 if (ssid && ssid->no_auto_peer && 741 (is_zero_ether_addr(data->mesh_required_peer) || 742 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) { 743 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with " 744 MACSTR " because of no_auto_peer", MAC2STR(addr)); 745 if (data->mesh_pending_auth) { 746 struct os_reltime age; 747 const struct ieee80211_mgmt *mgmt; 748 struct hostapd_frame_info fi; 749 750 mgmt = wpabuf_head(data->mesh_pending_auth); 751 os_reltime_age(&data->mesh_pending_auth_time, &age); 752 if (age.sec < 2 && 753 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) { 754 wpa_printf(MSG_DEBUG, 755 "mesh: Process pending Authentication frame from %u.%06u seconds ago", 756 (unsigned int) age.sec, 757 (unsigned int) age.usec); 758 os_memset(&fi, 0, sizeof(fi)); 759 ieee802_11_mgmt( 760 data, 761 wpabuf_head(data->mesh_pending_auth), 762 wpabuf_len(data->mesh_pending_auth), 763 &fi); 764 } 765 wpabuf_free(data->mesh_pending_auth); 766 data->mesh_pending_auth = NULL; 767 } 768 return; 769 } 770 771 if (conf->security == MESH_CONF_SEC_NONE) { 772 if (sta->plink_state < PLINK_OPN_SNT || 773 sta->plink_state > PLINK_ESTAB) 774 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 775 } else { 776 mesh_rsn_auth_sae_sta(wpa_s, sta); 777 } 778 } 779 780 781 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt) 782 { 783 struct hostapd_frame_info fi; 784 785 os_memset(&fi, 0, sizeof(fi)); 786 fi.datarate = rx_mgmt->datarate; 787 fi.ssi_signal = rx_mgmt->ssi_signal; 788 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame, 789 rx_mgmt->frame_len, &fi); 790 } 791 792 793 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s, 794 struct sta_info *sta) 795 { 796 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 797 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 798 u8 seq[6] = {}; 799 800 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established", 801 MAC2STR(sta->addr)); 802 803 if (conf->security & MESH_CONF_SEC_AMPE) { 804 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len); 805 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher), 806 sta->addr, 0, 0, seq, sizeof(seq), 807 sta->mtk, sta->mtk_len); 808 809 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC", 810 sta->mgtk_rsc, sizeof(sta->mgtk_rsc)); 811 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK", 812 sta->mgtk, sta->mgtk_len); 813 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher), 814 sta->addr, sta->mgtk_key_id, 0, 815 sta->mgtk_rsc, sizeof(sta->mgtk_rsc), 816 sta->mgtk, sta->mgtk_len); 817 818 if (sta->igtk_len) { 819 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC", 820 sta->igtk_rsc, sizeof(sta->igtk_rsc)); 821 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK", 822 sta->igtk, sta->igtk_len); 823 wpa_drv_set_key( 824 wpa_s, 825 wpa_cipher_to_alg(conf->mgmt_group_cipher), 826 sta->addr, sta->igtk_key_id, 0, 827 sta->igtk_rsc, sizeof(sta->igtk_rsc), 828 sta->igtk, sta->igtk_len); 829 } 830 } 831 832 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB); 833 hapd->num_plinks++; 834 835 sta->flags |= WLAN_STA_ASSOC; 836 sta->mesh_sae_pmksa_caching = 0; 837 838 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 839 peer_add_timer(wpa_s, NULL); 840 eloop_cancel_timeout(plink_timer, wpa_s, sta); 841 842 /* Send ctrl event */ 843 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR, 844 MAC2STR(sta->addr)); 845 } 846 847 848 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta, 849 enum plink_event event, u16 reason) 850 { 851 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 852 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 853 854 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s", 855 MAC2STR(sta->addr), mplstate[sta->plink_state], 856 mplevent[event]); 857 858 switch (sta->plink_state) { 859 case PLINK_IDLE: 860 switch (event) { 861 case CLS_ACPT: 862 mesh_mpm_fsm_restart(wpa_s, sta); 863 break; 864 case OPN_ACPT: 865 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD); 866 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 867 0); 868 break; 869 case REQ_RJCT: 870 mesh_mpm_send_plink_action(wpa_s, sta, 871 PLINK_CLOSE, reason); 872 break; 873 default: 874 break; 875 } 876 break; 877 case PLINK_OPN_SNT: 878 switch (event) { 879 case OPN_RJCT: 880 case CNF_RJCT: 881 if (!reason) 882 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 883 /* fall-through */ 884 case CLS_ACPT: 885 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 886 if (!reason) 887 reason = WLAN_REASON_MESH_CLOSE_RCVD; 888 eloop_register_timeout( 889 conf->dot11MeshHoldingTimeout / 1000, 890 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 891 plink_timer, wpa_s, sta); 892 mesh_mpm_send_plink_action(wpa_s, sta, 893 PLINK_CLOSE, reason); 894 break; 895 case OPN_ACPT: 896 /* retry timer is left untouched */ 897 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD); 898 mesh_mpm_send_plink_action(wpa_s, sta, 899 PLINK_CONFIRM, 0); 900 break; 901 case CNF_ACPT: 902 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD); 903 eloop_cancel_timeout(plink_timer, wpa_s, sta); 904 eloop_register_timeout( 905 conf->dot11MeshConfirmTimeout / 1000, 906 (conf->dot11MeshConfirmTimeout % 1000) * 1000, 907 plink_timer, wpa_s, sta); 908 break; 909 default: 910 break; 911 } 912 break; 913 case PLINK_OPN_RCVD: 914 switch (event) { 915 case OPN_RJCT: 916 case CNF_RJCT: 917 if (!reason) 918 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 919 /* fall-through */ 920 case CLS_ACPT: 921 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 922 if (!reason) 923 reason = WLAN_REASON_MESH_CLOSE_RCVD; 924 eloop_register_timeout( 925 conf->dot11MeshHoldingTimeout / 1000, 926 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 927 plink_timer, wpa_s, sta); 928 sta->mpm_close_reason = reason; 929 mesh_mpm_send_plink_action(wpa_s, sta, 930 PLINK_CLOSE, reason); 931 break; 932 case OPN_ACPT: 933 mesh_mpm_send_plink_action(wpa_s, sta, 934 PLINK_CONFIRM, 0); 935 break; 936 case CNF_ACPT: 937 if (conf->security & MESH_CONF_SEC_AMPE) 938 mesh_rsn_derive_mtk(wpa_s, sta); 939 mesh_mpm_plink_estab(wpa_s, sta); 940 break; 941 default: 942 break; 943 } 944 break; 945 case PLINK_CNF_RCVD: 946 switch (event) { 947 case OPN_RJCT: 948 case CNF_RJCT: 949 if (!reason) 950 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 951 /* fall-through */ 952 case CLS_ACPT: 953 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 954 if (!reason) 955 reason = WLAN_REASON_MESH_CLOSE_RCVD; 956 eloop_register_timeout( 957 conf->dot11MeshHoldingTimeout / 1000, 958 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 959 plink_timer, wpa_s, sta); 960 sta->mpm_close_reason = reason; 961 mesh_mpm_send_plink_action(wpa_s, sta, 962 PLINK_CLOSE, reason); 963 break; 964 case OPN_ACPT: 965 if (conf->security & MESH_CONF_SEC_AMPE) 966 mesh_rsn_derive_mtk(wpa_s, sta); 967 mesh_mpm_plink_estab(wpa_s, sta); 968 mesh_mpm_send_plink_action(wpa_s, sta, 969 PLINK_CONFIRM, 0); 970 break; 971 default: 972 break; 973 } 974 break; 975 case PLINK_ESTAB: 976 switch (event) { 977 case OPN_RJCT: 978 case CNF_RJCT: 979 case CLS_ACPT: 980 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 981 if (!reason) 982 reason = WLAN_REASON_MESH_CLOSE_RCVD; 983 984 eloop_register_timeout( 985 conf->dot11MeshHoldingTimeout / 1000, 986 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 987 plink_timer, wpa_s, sta); 988 sta->mpm_close_reason = reason; 989 990 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR 991 " closed with reason %d", 992 MAC2STR(sta->addr), reason); 993 994 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR, 995 MAC2STR(sta->addr)); 996 997 hapd->num_plinks--; 998 999 mesh_mpm_send_plink_action(wpa_s, sta, 1000 PLINK_CLOSE, reason); 1001 break; 1002 case OPN_ACPT: 1003 mesh_mpm_send_plink_action(wpa_s, sta, 1004 PLINK_CONFIRM, 0); 1005 break; 1006 default: 1007 break; 1008 } 1009 break; 1010 case PLINK_HOLDING: 1011 switch (event) { 1012 case CLS_ACPT: 1013 mesh_mpm_fsm_restart(wpa_s, sta); 1014 break; 1015 case OPN_ACPT: 1016 case CNF_ACPT: 1017 case OPN_RJCT: 1018 case CNF_RJCT: 1019 reason = sta->mpm_close_reason; 1020 mesh_mpm_send_plink_action(wpa_s, sta, 1021 PLINK_CLOSE, reason); 1022 break; 1023 default: 1024 break; 1025 } 1026 break; 1027 default: 1028 wpa_msg(wpa_s, MSG_DEBUG, 1029 "Unsupported MPM event %s for state %s", 1030 mplevent[event], mplstate[sta->plink_state]); 1031 break; 1032 } 1033 } 1034 1035 1036 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s, 1037 const struct ieee80211_mgmt *mgmt, size_t len) 1038 { 1039 u8 action_field; 1040 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 1041 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 1042 struct sta_info *sta; 1043 u16 plid = 0, llid = 0, aid = 0; 1044 enum plink_event event; 1045 struct ieee802_11_elems elems; 1046 struct mesh_peer_mgmt_ie peer_mgmt_ie; 1047 const u8 *ies; 1048 size_t ie_len; 1049 int ret; 1050 u16 reason = 0; 1051 1052 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED) 1053 return; 1054 1055 action_field = mgmt->u.action.u.slf_prot_action.action; 1056 if (action_field != PLINK_OPEN && 1057 action_field != PLINK_CONFIRM && 1058 action_field != PLINK_CLOSE) 1059 return; 1060 1061 ies = mgmt->u.action.u.slf_prot_action.variable; 1062 ie_len = (const u8 *) mgmt + len - 1063 mgmt->u.action.u.slf_prot_action.variable; 1064 1065 /* at least expect mesh id and peering mgmt */ 1066 if (ie_len < 2 + 2) { 1067 wpa_printf(MSG_DEBUG, 1068 "MPM: Ignore too short action frame %u ie_len %u", 1069 action_field, (unsigned int) ie_len); 1070 return; 1071 } 1072 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field); 1073 1074 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) { 1075 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x", 1076 WPA_GET_LE16(ies)); 1077 ies += 2; /* capability */ 1078 ie_len -= 2; 1079 } 1080 if (action_field == PLINK_CONFIRM) { 1081 aid = WPA_GET_LE16(ies); 1082 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid); 1083 ies += 2; /* aid */ 1084 ie_len -= 2; 1085 } 1086 1087 /* check for mesh peering, mesh id and mesh config IEs */ 1088 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) { 1089 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs"); 1090 return; 1091 } 1092 if (!elems.peer_mgmt) { 1093 wpa_printf(MSG_DEBUG, 1094 "MPM: No Mesh Peering Management element"); 1095 return; 1096 } 1097 if (action_field != PLINK_CLOSE) { 1098 if (!elems.mesh_id || !elems.mesh_config) { 1099 wpa_printf(MSG_DEBUG, 1100 "MPM: No Mesh ID or Mesh Configuration element"); 1101 return; 1102 } 1103 1104 if (!matches_local(wpa_s, &elems)) { 1105 wpa_printf(MSG_DEBUG, 1106 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS"); 1107 return; 1108 } 1109 } 1110 1111 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field, 1112 elems.peer_mgmt, 1113 elems.peer_mgmt_len, 1114 &peer_mgmt_ie); 1115 if (ret) { 1116 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame"); 1117 return; 1118 } 1119 1120 /* the sender's llid is our plid and vice-versa */ 1121 plid = WPA_GET_LE16(peer_mgmt_ie.llid); 1122 if (peer_mgmt_ie.plid) 1123 llid = WPA_GET_LE16(peer_mgmt_ie.plid); 1124 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid); 1125 1126 if (action_field == PLINK_CLOSE) 1127 wpa_printf(MSG_DEBUG, "MPM: close reason=%u", 1128 WPA_GET_LE16(peer_mgmt_ie.reason)); 1129 1130 sta = ap_get_sta(hapd, mgmt->sa); 1131 1132 /* 1133 * If this is an open frame from an unknown STA, and this is an 1134 * open mesh, then go ahead and add the peer before proceeding. 1135 */ 1136 if (!sta && action_field == PLINK_OPEN && 1137 (!(mconf->security & MESH_CONF_SEC_AMPE) || 1138 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa))) 1139 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems); 1140 1141 if (!sta) { 1142 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer"); 1143 return; 1144 } 1145 1146 #ifdef CONFIG_SAE 1147 /* peer is in sae_accepted? */ 1148 if (sta->sae && sta->sae->state != SAE_ACCEPTED) { 1149 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer"); 1150 return; 1151 } 1152 #endif /* CONFIG_SAE */ 1153 1154 if (!sta->my_lid) 1155 mesh_mpm_init_link(wpa_s, sta); 1156 1157 if (mconf->security & MESH_CONF_SEC_AMPE) { 1158 int res; 1159 1160 res = mesh_rsn_process_ampe(wpa_s, sta, &elems, 1161 &mgmt->u.action.category, 1162 peer_mgmt_ie.chosen_pmk, 1163 ies, ie_len); 1164 if (res) { 1165 wpa_printf(MSG_DEBUG, 1166 "MPM: RSN process rejected frame (res=%d)", 1167 res); 1168 if (action_field == PLINK_OPEN && res == -2) { 1169 /* AES-SIV decryption failed */ 1170 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT, 1171 WLAN_REASON_MESH_INVALID_GTK); 1172 } 1173 return; 1174 } 1175 } 1176 1177 if (sta->plink_state == PLINK_BLOCKED) { 1178 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED"); 1179 return; 1180 } 1181 1182 /* Now we will figure out the appropriate event... */ 1183 switch (action_field) { 1184 case PLINK_OPEN: 1185 if (plink_free_count(hapd) == 0) { 1186 event = REQ_RJCT; 1187 reason = WLAN_REASON_MESH_MAX_PEERS; 1188 wpa_printf(MSG_INFO, 1189 "MPM: Peer link num over quota(%d)", 1190 hapd->max_plinks); 1191 } else if (sta->peer_lid && sta->peer_lid != plid) { 1192 wpa_printf(MSG_DEBUG, 1193 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1194 sta->peer_lid, plid); 1195 return; /* no FSM event */ 1196 } else { 1197 sta->peer_lid = plid; 1198 event = OPN_ACPT; 1199 } 1200 break; 1201 case PLINK_CONFIRM: 1202 if (plink_free_count(hapd) == 0) { 1203 event = REQ_RJCT; 1204 reason = WLAN_REASON_MESH_MAX_PEERS; 1205 wpa_printf(MSG_INFO, 1206 "MPM: Peer link num over quota(%d)", 1207 hapd->max_plinks); 1208 } else if (sta->my_lid != llid || 1209 (sta->peer_lid && sta->peer_lid != plid)) { 1210 wpa_printf(MSG_DEBUG, 1211 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x", 1212 sta->my_lid, llid, sta->peer_lid, plid); 1213 return; /* no FSM event */ 1214 } else { 1215 if (!sta->peer_lid) 1216 sta->peer_lid = plid; 1217 sta->peer_aid = aid; 1218 event = CNF_ACPT; 1219 } 1220 break; 1221 case PLINK_CLOSE: 1222 if (sta->plink_state == PLINK_ESTAB) 1223 /* Do not check for llid or plid. This does not 1224 * follow the standard but since multiple plinks 1225 * per cand are not supported, it is necessary in 1226 * order to avoid a livelock when MP A sees an 1227 * establish peer link to MP B but MP B does not 1228 * see it. This can be caused by a timeout in 1229 * B's peer link establishment or B being 1230 * restarted. 1231 */ 1232 event = CLS_ACPT; 1233 else if (sta->peer_lid != plid) { 1234 wpa_printf(MSG_DEBUG, 1235 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1236 sta->peer_lid, plid); 1237 return; /* no FSM event */ 1238 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) { 1239 wpa_printf(MSG_DEBUG, 1240 "MPM: my_lid mismatch: 0x%x != 0x%x", 1241 sta->my_lid, llid); 1242 return; /* no FSM event */ 1243 } else { 1244 event = CLS_ACPT; 1245 } 1246 break; 1247 default: 1248 /* 1249 * This cannot be hit due to the action_field check above, but 1250 * compilers may not be able to figure that out and can warn 1251 * about uninitialized event below. 1252 */ 1253 return; 1254 } 1255 mesh_mpm_fsm(wpa_s, sta, event, reason); 1256 } 1257 1258 1259 /* called by ap_free_sta */ 1260 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta) 1261 { 1262 if (sta->plink_state == PLINK_ESTAB) 1263 hapd->num_plinks--; 1264 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta); 1265 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta); 1266 } 1267