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 "common/hw_features_common.h" 15 #include "ap/hostapd.h" 16 #include "ap/sta_info.h" 17 #include "ap/ieee802_11.h" 18 #include "ap/wpa_auth.h" 19 #include "wpa_supplicant_i.h" 20 #include "driver_i.h" 21 #include "mesh_mpm.h" 22 #include "mesh_rsn.h" 23 24 struct mesh_peer_mgmt_ie { 25 const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */ 26 const u8 *llid; /* Local Link ID (2 octets) */ 27 const u8 *plid; /* Peer Link ID (conditional, 2 octets) */ 28 const u8 *reason; /* Reason Code (conditional, 2 octets) */ 29 const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */ 30 }; 31 32 static void plink_timer(void *eloop_ctx, void *user_data); 33 34 35 enum plink_event { 36 PLINK_UNDEFINED, 37 OPN_ACPT, 38 OPN_RJCT, 39 CNF_ACPT, 40 CNF_RJCT, 41 CLS_ACPT, 42 REQ_RJCT 43 }; 44 45 static const char * const mplstate[] = { 46 [0] = "UNINITIALIZED", 47 [PLINK_IDLE] = "IDLE", 48 [PLINK_OPN_SNT] = "OPN_SNT", 49 [PLINK_OPN_RCVD] = "OPN_RCVD", 50 [PLINK_CNF_RCVD] = "CNF_RCVD", 51 [PLINK_ESTAB] = "ESTAB", 52 [PLINK_HOLDING] = "HOLDING", 53 [PLINK_BLOCKED] = "BLOCKED" 54 }; 55 56 static const char * const mplevent[] = { 57 [PLINK_UNDEFINED] = "UNDEFINED", 58 [OPN_ACPT] = "OPN_ACPT", 59 [OPN_RJCT] = "OPN_RJCT", 60 [CNF_ACPT] = "CNF_ACPT", 61 [CNF_RJCT] = "CNF_RJCT", 62 [CLS_ACPT] = "CLS_ACPT", 63 [REQ_RJCT] = "REQ_RJCT", 64 }; 65 66 67 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s, 68 u8 action_field, 69 const u8 *ie, size_t len, 70 struct mesh_peer_mgmt_ie *mpm_ie) 71 { 72 os_memset(mpm_ie, 0, sizeof(*mpm_ie)); 73 74 /* Remove optional Chosen PMK field at end */ 75 if (len >= SAE_PMKID_LEN) { 76 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN; 77 len -= SAE_PMKID_LEN; 78 } 79 80 if ((action_field == PLINK_OPEN && len != 4) || 81 (action_field == PLINK_CONFIRM && len != 6) || 82 (action_field == PLINK_CLOSE && len != 6 && len != 8)) { 83 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie"); 84 return -1; 85 } 86 87 /* required fields */ 88 if (len < 4) 89 return -1; 90 mpm_ie->proto_id = ie; 91 mpm_ie->llid = ie + 2; 92 ie += 4; 93 len -= 4; 94 95 /* close reason is always present at end for close */ 96 if (action_field == PLINK_CLOSE) { 97 if (len < 2) 98 return -1; 99 mpm_ie->reason = ie + len - 2; 100 len -= 2; 101 } 102 103 /* Peer Link ID, present for confirm, and possibly close */ 104 if (len >= 2) 105 mpm_ie->plid = ie; 106 107 return 0; 108 } 109 110 111 static int plink_free_count(struct hostapd_data *hapd) 112 { 113 if (hapd->max_plinks > hapd->num_plinks) 114 return hapd->max_plinks - hapd->num_plinks; 115 return 0; 116 } 117 118 119 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s, 120 struct sta_info *sta, 121 struct ieee802_11_elems *elems) 122 { 123 if (!elems->supp_rates) { 124 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR, 125 MAC2STR(sta->addr)); 126 return WLAN_STATUS_UNSPECIFIED_FAILURE; 127 } 128 129 if (elems->supp_rates_len + elems->ext_supp_rates_len > 130 sizeof(sta->supported_rates)) { 131 wpa_msg(wpa_s, MSG_ERROR, 132 "Invalid supported rates element length " MACSTR 133 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len, 134 elems->ext_supp_rates_len); 135 return WLAN_STATUS_UNSPECIFIED_FAILURE; 136 } 137 138 sta->supported_rates_len = merge_byte_arrays( 139 sta->supported_rates, sizeof(sta->supported_rates), 140 elems->supp_rates, elems->supp_rates_len, 141 elems->ext_supp_rates, elems->ext_supp_rates_len); 142 143 return WLAN_STATUS_SUCCESS; 144 } 145 146 147 /* return true if elems from a neighbor match this MBSS */ 148 static Boolean matches_local(struct wpa_supplicant *wpa_s, 149 struct ieee802_11_elems *elems) 150 { 151 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 152 153 if (elems->mesh_config_len < 5) 154 return FALSE; 155 156 return (mconf->meshid_len == elems->mesh_id_len && 157 os_memcmp(mconf->meshid, elems->mesh_id, 158 elems->mesh_id_len) == 0 && 159 mconf->mesh_pp_id == elems->mesh_config[0] && 160 mconf->mesh_pm_id == elems->mesh_config[1] && 161 mconf->mesh_cc_id == elems->mesh_config[2] && 162 mconf->mesh_sp_id == elems->mesh_config[3] && 163 mconf->mesh_auth_id == elems->mesh_config[4]); 164 } 165 166 167 /* check if local link id is already used with another peer */ 168 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid) 169 { 170 struct sta_info *sta; 171 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 172 173 for (sta = hapd->sta_list; sta; sta = sta->next) { 174 if (sta->my_lid == llid) 175 return TRUE; 176 } 177 178 return FALSE; 179 } 180 181 182 /* generate an llid for a link and set to initial state */ 183 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s, 184 struct sta_info *sta) 185 { 186 u16 llid; 187 188 do { 189 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0) 190 continue; 191 } while (!llid || llid_in_use(wpa_s, llid)); 192 193 sta->my_lid = llid; 194 sta->peer_lid = 0; 195 sta->peer_aid = 0; 196 197 /* 198 * We do not use wpa_mesh_set_plink_state() here because there is no 199 * entry in kernel yet. 200 */ 201 sta->plink_state = PLINK_IDLE; 202 } 203 204 205 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s, 206 struct sta_info *sta, 207 enum plink_action_field type, 208 u16 close_reason) 209 { 210 struct wpabuf *buf; 211 struct hostapd_iface *ifmsh = wpa_s->ifmsh; 212 struct hostapd_data *bss = ifmsh->bss[0]; 213 struct mesh_conf *conf = ifmsh->mconf; 214 u8 supp_rates[2 + 2 + 32]; 215 u8 *pos, *cat; 216 u8 ie_len, add_plid = 0; 217 int ret; 218 int ampe = conf->security & MESH_CONF_SEC_AMPE; 219 size_t buf_len; 220 221 if (!sta) 222 return; 223 224 buf_len = 2 + /* capability info */ 225 2 + /* AID */ 226 2 + 8 + /* supported rates */ 227 2 + (32 - 8) + 228 2 + 32 + /* mesh ID */ 229 2 + 7 + /* mesh config */ 230 2 + 23 + /* peering management */ 231 2 + 96 + /* AMPE */ 232 2 + 16; /* MIC */ 233 #ifdef CONFIG_IEEE80211N 234 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 235 buf_len += 2 + 26 + /* HT capabilities */ 236 2 + 22; /* HT operation */ 237 } 238 #endif /* CONFIG_IEEE80211N */ 239 #ifdef CONFIG_IEEE80211AC 240 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 241 buf_len += 2 + 12 + /* VHT Capabilities */ 242 2 + 5; /* VHT Operation */ 243 } 244 #endif /* CONFIG_IEEE80211AC */ 245 if (type != PLINK_CLOSE) 246 buf_len += conf->rsn_ie_len; /* RSN IE */ 247 248 buf = wpabuf_alloc(buf_len); 249 if (!buf) 250 return; 251 252 cat = wpabuf_mhead_u8(buf); 253 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED); 254 wpabuf_put_u8(buf, type); 255 256 if (type != PLINK_CLOSE) { 257 u8 info; 258 259 /* capability info */ 260 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0); 261 262 /* aid */ 263 if (type == PLINK_CONFIRM) 264 wpabuf_put_le16(buf, sta->aid); 265 266 /* IE: supp + ext. supp rates */ 267 pos = hostapd_eid_supp_rates(bss, supp_rates); 268 pos = hostapd_eid_ext_supp_rates(bss, pos); 269 wpabuf_put_data(buf, supp_rates, pos - supp_rates); 270 271 /* IE: RSN IE */ 272 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len); 273 274 /* IE: Mesh ID */ 275 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 276 wpabuf_put_u8(buf, conf->meshid_len); 277 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 278 279 /* IE: mesh conf */ 280 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG); 281 wpabuf_put_u8(buf, 7); 282 wpabuf_put_u8(buf, conf->mesh_pp_id); 283 wpabuf_put_u8(buf, conf->mesh_pm_id); 284 wpabuf_put_u8(buf, conf->mesh_cc_id); 285 wpabuf_put_u8(buf, conf->mesh_sp_id); 286 wpabuf_put_u8(buf, conf->mesh_auth_id); 287 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1; 288 /* TODO: Add Connected to Mesh Gate/AS subfields */ 289 wpabuf_put_u8(buf, info); 290 /* always forwarding & accepting plinks for now */ 291 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER | 292 MESH_CAP_FORWARDING); 293 } else { /* Peer closing frame */ 294 /* IE: Mesh ID */ 295 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 296 wpabuf_put_u8(buf, conf->meshid_len); 297 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 298 } 299 300 /* IE: Mesh Peering Management element */ 301 ie_len = 4; 302 if (ampe) 303 ie_len += PMKID_LEN; 304 switch (type) { 305 case PLINK_OPEN: 306 break; 307 case PLINK_CONFIRM: 308 ie_len += 2; 309 add_plid = 1; 310 break; 311 case PLINK_CLOSE: 312 ie_len += 2; 313 add_plid = 1; 314 ie_len += 2; /* reason code */ 315 break; 316 } 317 318 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT); 319 wpabuf_put_u8(buf, ie_len); 320 /* peering protocol */ 321 if (ampe) 322 wpabuf_put_le16(buf, 1); 323 else 324 wpabuf_put_le16(buf, 0); 325 wpabuf_put_le16(buf, sta->my_lid); 326 if (add_plid) 327 wpabuf_put_le16(buf, sta->peer_lid); 328 if (type == PLINK_CLOSE) 329 wpabuf_put_le16(buf, close_reason); 330 if (ampe) { 331 if (sta->sae == NULL) { 332 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session"); 333 goto fail; 334 } 335 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta, 336 wpabuf_put(buf, PMKID_LEN)); 337 } 338 339 #ifdef CONFIG_IEEE80211N 340 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 341 u8 ht_capa_oper[2 + 26 + 2 + 22]; 342 343 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper); 344 pos = hostapd_eid_ht_operation(bss, pos); 345 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper); 346 } 347 #endif /* CONFIG_IEEE80211N */ 348 #ifdef CONFIG_IEEE80211AC 349 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 350 u8 vht_capa_oper[2 + 12 + 2 + 5]; 351 352 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0); 353 pos = hostapd_eid_vht_operation(bss, pos); 354 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper); 355 } 356 #endif /* CONFIG_IEEE80211AC */ 357 358 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) { 359 wpa_msg(wpa_s, MSG_INFO, 360 "Mesh MPM: failed to add AMPE and MIC IE"); 361 goto fail; 362 } 363 364 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to " 365 MACSTR " (my_lid=0x%x peer_lid=0x%x)", 366 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid); 367 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, 368 sta->addr, wpa_s->own_addr, wpa_s->own_addr, 369 wpabuf_head(buf), wpabuf_len(buf), 0); 370 if (ret < 0) 371 wpa_msg(wpa_s, MSG_INFO, 372 "Mesh MPM: failed to send peering frame"); 373 374 fail: 375 wpabuf_free(buf); 376 } 377 378 379 /* configure peering state in ours and driver's station entry */ 380 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, 381 struct sta_info *sta, 382 enum mesh_plink_state state) 383 { 384 struct hostapd_sta_add_params params; 385 int ret; 386 387 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s", 388 MAC2STR(sta->addr), mplstate[sta->plink_state], 389 mplstate[state]); 390 sta->plink_state = state; 391 392 os_memset(¶ms, 0, sizeof(params)); 393 params.addr = sta->addr; 394 params.plink_state = state; 395 params.peer_aid = sta->peer_aid; 396 params.set = 1; 397 398 ret = wpa_drv_sta_add(wpa_s, ¶ms); 399 if (ret) { 400 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR 401 ": %d", MAC2STR(sta->addr), ret); 402 } 403 } 404 405 406 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s, 407 struct sta_info *sta) 408 { 409 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 410 411 eloop_cancel_timeout(plink_timer, wpa_s, sta); 412 413 ap_free_sta(hapd, sta); 414 } 415 416 417 static void plink_timer(void *eloop_ctx, void *user_data) 418 { 419 struct wpa_supplicant *wpa_s = eloop_ctx; 420 struct sta_info *sta = user_data; 421 u16 reason = 0; 422 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 423 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 424 425 switch (sta->plink_state) { 426 case PLINK_OPN_RCVD: 427 case PLINK_OPN_SNT: 428 /* retry timer */ 429 if (sta->mpm_retries < conf->dot11MeshMaxRetries) { 430 eloop_register_timeout( 431 conf->dot11MeshRetryTimeout / 1000, 432 (conf->dot11MeshRetryTimeout % 1000) * 1000, 433 plink_timer, wpa_s, sta); 434 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 435 sta->mpm_retries++; 436 break; 437 } 438 reason = WLAN_REASON_MESH_MAX_RETRIES; 439 /* fall through on else */ 440 441 case PLINK_CNF_RCVD: 442 /* confirm timer */ 443 if (!reason) 444 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT; 445 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 446 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000, 447 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 448 plink_timer, wpa_s, sta); 449 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 450 break; 451 case PLINK_HOLDING: 452 /* holding timer */ 453 454 if (sta->mesh_sae_pmksa_caching) { 455 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR 456 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it", 457 MAC2STR(sta->addr)); 458 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 459 } 460 mesh_mpm_fsm_restart(wpa_s, sta); 461 break; 462 default: 463 break; 464 } 465 } 466 467 468 /* initiate peering with station */ 469 static void 470 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta, 471 enum mesh_plink_state next_state) 472 { 473 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 474 475 eloop_cancel_timeout(plink_timer, wpa_s, sta); 476 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000, 477 (conf->dot11MeshRetryTimeout % 1000) * 1000, 478 plink_timer, wpa_s, sta); 479 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 480 wpa_mesh_set_plink_state(wpa_s, sta, next_state); 481 } 482 483 484 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta, 485 void *ctx) 486 { 487 struct wpa_supplicant *wpa_s = ctx; 488 int reason = WLAN_REASON_MESH_PEERING_CANCELLED; 489 490 if (sta) { 491 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 492 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 493 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR, 494 MAC2STR(sta->addr)); 495 eloop_cancel_timeout(plink_timer, wpa_s, sta); 496 return 0; 497 } 498 499 return 1; 500 } 501 502 503 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 504 { 505 struct hostapd_data *hapd; 506 struct sta_info *sta; 507 508 if (!wpa_s->ifmsh) { 509 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 510 return -1; 511 } 512 513 hapd = wpa_s->ifmsh->bss[0]; 514 sta = ap_get_sta(hapd, addr); 515 if (!sta) { 516 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 517 return -1; 518 } 519 520 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1; 521 } 522 523 524 static void peer_add_timer(void *eloop_ctx, void *user_data) 525 { 526 struct wpa_supplicant *wpa_s = eloop_ctx; 527 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 528 529 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN); 530 } 531 532 533 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 534 int duration) 535 { 536 struct wpa_ssid *ssid = wpa_s->current_ssid; 537 struct hostapd_data *hapd; 538 struct sta_info *sta; 539 struct mesh_conf *conf; 540 541 if (!wpa_s->ifmsh) { 542 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 543 return -1; 544 } 545 546 if (!ssid || !ssid->no_auto_peer) { 547 wpa_msg(wpa_s, MSG_INFO, 548 "This command is available only with no_auto_peer mesh network"); 549 return -1; 550 } 551 552 hapd = wpa_s->ifmsh->bss[0]; 553 conf = wpa_s->ifmsh->mconf; 554 555 sta = ap_get_sta(hapd, addr); 556 if (!sta) { 557 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 558 return -1; 559 } 560 561 if ((PLINK_OPN_SNT <= sta->plink_state && 562 sta->plink_state <= PLINK_ESTAB) || 563 (sta->sae && sta->sae->state > SAE_NOTHING)) { 564 wpa_msg(wpa_s, MSG_INFO, 565 "Specified peer is connecting/connected"); 566 return -1; 567 } 568 569 if (conf->security == MESH_CONF_SEC_NONE) { 570 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 571 } else { 572 mesh_rsn_auth_sae_sta(wpa_s, sta); 573 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN); 574 eloop_register_timeout(duration == -1 ? 10 : duration, 0, 575 peer_add_timer, wpa_s, NULL); 576 } 577 578 return 0; 579 } 580 581 582 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh) 583 { 584 struct hostapd_data *hapd = ifmsh->bss[0]; 585 586 /* notify peers we're leaving */ 587 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s); 588 589 hapd->num_plinks = 0; 590 hostapd_free_stas(hapd); 591 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 592 } 593 594 595 /* for mesh_rsn to indicate this peer has completed authentication, and we're 596 * ready to start AMPE */ 597 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 598 { 599 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 600 struct hostapd_sta_add_params params; 601 struct sta_info *sta; 602 int ret; 603 604 sta = ap_get_sta(data, addr); 605 if (!sta) { 606 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer"); 607 return; 608 } 609 610 /* TODO: Should do nothing if this STA is already authenticated, but 611 * the AP code already sets this flag. */ 612 sta->flags |= WLAN_STA_AUTH; 613 614 mesh_rsn_init_ampe_sta(wpa_s, sta); 615 616 os_memset(¶ms, 0, sizeof(params)); 617 params.addr = sta->addr; 618 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED; 619 params.set = 1; 620 621 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR, 622 MAC2STR(sta->addr)); 623 ret = wpa_drv_sta_add(wpa_s, ¶ms); 624 if (ret) { 625 wpa_msg(wpa_s, MSG_ERROR, 626 "Driver failed to set " MACSTR ": %d", 627 MAC2STR(sta->addr), ret); 628 } 629 630 if (!sta->my_lid) 631 mesh_mpm_init_link(wpa_s, sta); 632 633 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 634 } 635 636 /* 637 * Initialize a sta_info structure for a peer and upload it into the driver 638 * in preparation for beginning authentication or peering. This is done when a 639 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is 640 * received from the peer for the first time. 641 */ 642 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s, 643 const u8 *addr, 644 struct ieee802_11_elems *elems) 645 { 646 struct hostapd_sta_add_params params; 647 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 648 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 649 struct sta_info *sta; 650 #ifdef CONFIG_IEEE80211N 651 struct ieee80211_ht_operation *oper; 652 #endif /* CONFIG_IEEE80211N */ 653 int ret; 654 655 if (elems->mesh_config_len >= 7 && 656 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) { 657 wpa_msg(wpa_s, MSG_DEBUG, 658 "mesh: Ignore a crowded peer " MACSTR, 659 MAC2STR(addr)); 660 return NULL; 661 } 662 663 sta = ap_get_sta(data, addr); 664 if (!sta) { 665 sta = ap_sta_add(data, addr); 666 if (!sta) 667 return NULL; 668 } 669 670 /* Set WMM by default since Mesh STAs are QoS STAs */ 671 sta->flags |= WLAN_STA_WMM; 672 673 /* initialize sta */ 674 if (copy_supp_rates(wpa_s, sta, elems)) { 675 ap_free_sta(data, sta); 676 return NULL; 677 } 678 679 if (!sta->my_lid) 680 mesh_mpm_init_link(wpa_s, sta); 681 682 #ifdef CONFIG_IEEE80211N 683 copy_sta_ht_capab(data, sta, elems->ht_capabilities); 684 685 oper = (struct ieee80211_ht_operation *) elems->ht_operation; 686 if (oper && 687 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) && 688 sta->ht_capabilities) { 689 wpa_msg(wpa_s, MSG_DEBUG, MACSTR 690 " does not support 40 MHz bandwidth", 691 MAC2STR(sta->addr)); 692 set_disable_ht40(sta->ht_capabilities, 1); 693 } 694 695 update_ht_state(data, sta); 696 #endif /* CONFIG_IEEE80211N */ 697 698 #ifdef CONFIG_IEEE80211AC 699 copy_sta_vht_capab(data, sta, elems->vht_capabilities); 700 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif); 701 #endif /* CONFIG_IEEE80211AC */ 702 703 if (hostapd_get_aid(data, sta) < 0) { 704 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available"); 705 ap_free_sta(data, sta); 706 return NULL; 707 } 708 709 /* insert into driver */ 710 os_memset(¶ms, 0, sizeof(params)); 711 params.supp_rates = sta->supported_rates; 712 params.supp_rates_len = sta->supported_rates_len; 713 params.addr = addr; 714 params.plink_state = sta->plink_state; 715 params.aid = sta->aid; 716 params.peer_aid = sta->peer_aid; 717 params.listen_interval = 100; 718 params.ht_capabilities = sta->ht_capabilities; 719 params.vht_capabilities = sta->vht_capabilities; 720 params.flags |= WPA_STA_WMM; 721 params.flags_mask |= WPA_STA_AUTHENTICATED; 722 if (conf->security == MESH_CONF_SEC_NONE) { 723 params.flags |= WPA_STA_AUTHORIZED; 724 params.flags |= WPA_STA_AUTHENTICATED; 725 } else { 726 sta->flags |= WLAN_STA_MFP; 727 params.flags |= WPA_STA_MFP; 728 } 729 730 ret = wpa_drv_sta_add(wpa_s, ¶ms); 731 if (ret) { 732 wpa_msg(wpa_s, MSG_ERROR, 733 "Driver failed to insert " MACSTR ": %d", 734 MAC2STR(addr), ret); 735 ap_free_sta(data, sta); 736 return NULL; 737 } 738 739 return sta; 740 } 741 742 743 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 744 struct ieee802_11_elems *elems) 745 { 746 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 747 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 748 struct sta_info *sta; 749 struct wpa_ssid *ssid = wpa_s->current_ssid; 750 751 sta = mesh_mpm_add_peer(wpa_s, addr, elems); 752 if (!sta) 753 return; 754 755 if (ssid && ssid->no_auto_peer && 756 (is_zero_ether_addr(data->mesh_required_peer) || 757 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) { 758 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with " 759 MACSTR " because of no_auto_peer", MAC2STR(addr)); 760 if (data->mesh_pending_auth) { 761 struct os_reltime age; 762 const struct ieee80211_mgmt *mgmt; 763 struct hostapd_frame_info fi; 764 765 mgmt = wpabuf_head(data->mesh_pending_auth); 766 os_reltime_age(&data->mesh_pending_auth_time, &age); 767 if (age.sec < 2 && 768 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) { 769 wpa_printf(MSG_DEBUG, 770 "mesh: Process pending Authentication frame from %u.%06u seconds ago", 771 (unsigned int) age.sec, 772 (unsigned int) age.usec); 773 os_memset(&fi, 0, sizeof(fi)); 774 ieee802_11_mgmt( 775 data, 776 wpabuf_head(data->mesh_pending_auth), 777 wpabuf_len(data->mesh_pending_auth), 778 &fi); 779 } 780 wpabuf_free(data->mesh_pending_auth); 781 data->mesh_pending_auth = NULL; 782 } 783 return; 784 } 785 786 if (conf->security == MESH_CONF_SEC_NONE) { 787 if (sta->plink_state < PLINK_OPN_SNT || 788 sta->plink_state > PLINK_ESTAB) 789 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 790 } else { 791 mesh_rsn_auth_sae_sta(wpa_s, sta); 792 } 793 } 794 795 796 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt) 797 { 798 struct hostapd_frame_info fi; 799 800 os_memset(&fi, 0, sizeof(fi)); 801 fi.datarate = rx_mgmt->datarate; 802 fi.ssi_signal = rx_mgmt->ssi_signal; 803 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame, 804 rx_mgmt->frame_len, &fi); 805 } 806 807 808 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s, 809 struct sta_info *sta) 810 { 811 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 812 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 813 u8 seq[6] = {}; 814 815 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established", 816 MAC2STR(sta->addr)); 817 818 if (conf->security & MESH_CONF_SEC_AMPE) { 819 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len); 820 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher), 821 sta->addr, 0, 0, seq, sizeof(seq), 822 sta->mtk, sta->mtk_len); 823 824 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC", 825 sta->mgtk_rsc, sizeof(sta->mgtk_rsc)); 826 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK", 827 sta->mgtk, sta->mgtk_len); 828 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher), 829 sta->addr, sta->mgtk_key_id, 0, 830 sta->mgtk_rsc, sizeof(sta->mgtk_rsc), 831 sta->mgtk, sta->mgtk_len); 832 833 if (sta->igtk_len) { 834 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC", 835 sta->igtk_rsc, sizeof(sta->igtk_rsc)); 836 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK", 837 sta->igtk, sta->igtk_len); 838 wpa_drv_set_key( 839 wpa_s, 840 wpa_cipher_to_alg(conf->mgmt_group_cipher), 841 sta->addr, sta->igtk_key_id, 0, 842 sta->igtk_rsc, sizeof(sta->igtk_rsc), 843 sta->igtk, sta->igtk_len); 844 } 845 } 846 847 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB); 848 hapd->num_plinks++; 849 850 sta->flags |= WLAN_STA_ASSOC; 851 sta->mesh_sae_pmksa_caching = 0; 852 853 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 854 peer_add_timer(wpa_s, NULL); 855 eloop_cancel_timeout(plink_timer, wpa_s, sta); 856 857 /* Send ctrl event */ 858 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR, 859 MAC2STR(sta->addr)); 860 } 861 862 863 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta, 864 enum plink_event event, u16 reason) 865 { 866 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 867 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 868 869 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s", 870 MAC2STR(sta->addr), mplstate[sta->plink_state], 871 mplevent[event]); 872 873 switch (sta->plink_state) { 874 case PLINK_IDLE: 875 switch (event) { 876 case CLS_ACPT: 877 mesh_mpm_fsm_restart(wpa_s, sta); 878 break; 879 case OPN_ACPT: 880 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD); 881 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 882 0); 883 break; 884 case REQ_RJCT: 885 mesh_mpm_send_plink_action(wpa_s, sta, 886 PLINK_CLOSE, reason); 887 break; 888 default: 889 break; 890 } 891 break; 892 case PLINK_OPN_SNT: 893 switch (event) { 894 case OPN_RJCT: 895 case CNF_RJCT: 896 if (!reason) 897 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 898 /* fall-through */ 899 case CLS_ACPT: 900 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 901 if (!reason) 902 reason = WLAN_REASON_MESH_CLOSE_RCVD; 903 eloop_register_timeout( 904 conf->dot11MeshHoldingTimeout / 1000, 905 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 906 plink_timer, wpa_s, sta); 907 mesh_mpm_send_plink_action(wpa_s, sta, 908 PLINK_CLOSE, reason); 909 break; 910 case OPN_ACPT: 911 /* retry timer is left untouched */ 912 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD); 913 mesh_mpm_send_plink_action(wpa_s, sta, 914 PLINK_CONFIRM, 0); 915 break; 916 case CNF_ACPT: 917 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD); 918 eloop_cancel_timeout(plink_timer, wpa_s, sta); 919 eloop_register_timeout( 920 conf->dot11MeshConfirmTimeout / 1000, 921 (conf->dot11MeshConfirmTimeout % 1000) * 1000, 922 plink_timer, wpa_s, sta); 923 break; 924 default: 925 break; 926 } 927 break; 928 case PLINK_OPN_RCVD: 929 switch (event) { 930 case OPN_RJCT: 931 case CNF_RJCT: 932 if (!reason) 933 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 934 /* fall-through */ 935 case CLS_ACPT: 936 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 937 if (!reason) 938 reason = WLAN_REASON_MESH_CLOSE_RCVD; 939 eloop_register_timeout( 940 conf->dot11MeshHoldingTimeout / 1000, 941 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 942 plink_timer, wpa_s, sta); 943 sta->mpm_close_reason = reason; 944 mesh_mpm_send_plink_action(wpa_s, sta, 945 PLINK_CLOSE, reason); 946 break; 947 case OPN_ACPT: 948 mesh_mpm_send_plink_action(wpa_s, sta, 949 PLINK_CONFIRM, 0); 950 break; 951 case CNF_ACPT: 952 if (conf->security & MESH_CONF_SEC_AMPE) 953 mesh_rsn_derive_mtk(wpa_s, sta); 954 mesh_mpm_plink_estab(wpa_s, sta); 955 break; 956 default: 957 break; 958 } 959 break; 960 case PLINK_CNF_RCVD: 961 switch (event) { 962 case OPN_RJCT: 963 case CNF_RJCT: 964 if (!reason) 965 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 966 /* fall-through */ 967 case CLS_ACPT: 968 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 969 if (!reason) 970 reason = WLAN_REASON_MESH_CLOSE_RCVD; 971 eloop_register_timeout( 972 conf->dot11MeshHoldingTimeout / 1000, 973 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 974 plink_timer, wpa_s, sta); 975 sta->mpm_close_reason = reason; 976 mesh_mpm_send_plink_action(wpa_s, sta, 977 PLINK_CLOSE, reason); 978 break; 979 case OPN_ACPT: 980 if (conf->security & MESH_CONF_SEC_AMPE) 981 mesh_rsn_derive_mtk(wpa_s, sta); 982 mesh_mpm_plink_estab(wpa_s, sta); 983 mesh_mpm_send_plink_action(wpa_s, sta, 984 PLINK_CONFIRM, 0); 985 break; 986 default: 987 break; 988 } 989 break; 990 case PLINK_ESTAB: 991 switch (event) { 992 case OPN_RJCT: 993 case CNF_RJCT: 994 case CLS_ACPT: 995 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 996 if (!reason) 997 reason = WLAN_REASON_MESH_CLOSE_RCVD; 998 999 eloop_register_timeout( 1000 conf->dot11MeshHoldingTimeout / 1000, 1001 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1002 plink_timer, wpa_s, sta); 1003 sta->mpm_close_reason = reason; 1004 1005 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR 1006 " closed with reason %d", 1007 MAC2STR(sta->addr), reason); 1008 1009 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR, 1010 MAC2STR(sta->addr)); 1011 1012 hapd->num_plinks--; 1013 1014 mesh_mpm_send_plink_action(wpa_s, sta, 1015 PLINK_CLOSE, reason); 1016 break; 1017 case OPN_ACPT: 1018 mesh_mpm_send_plink_action(wpa_s, sta, 1019 PLINK_CONFIRM, 0); 1020 break; 1021 default: 1022 break; 1023 } 1024 break; 1025 case PLINK_HOLDING: 1026 switch (event) { 1027 case CLS_ACPT: 1028 mesh_mpm_fsm_restart(wpa_s, sta); 1029 break; 1030 case OPN_ACPT: 1031 case CNF_ACPT: 1032 case OPN_RJCT: 1033 case CNF_RJCT: 1034 reason = sta->mpm_close_reason; 1035 mesh_mpm_send_plink_action(wpa_s, sta, 1036 PLINK_CLOSE, reason); 1037 break; 1038 default: 1039 break; 1040 } 1041 break; 1042 default: 1043 wpa_msg(wpa_s, MSG_DEBUG, 1044 "Unsupported MPM event %s for state %s", 1045 mplevent[event], mplstate[sta->plink_state]); 1046 break; 1047 } 1048 } 1049 1050 1051 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s, 1052 const struct ieee80211_mgmt *mgmt, size_t len) 1053 { 1054 u8 action_field; 1055 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 1056 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 1057 struct sta_info *sta; 1058 u16 plid = 0, llid = 0, aid = 0; 1059 enum plink_event event; 1060 struct ieee802_11_elems elems; 1061 struct mesh_peer_mgmt_ie peer_mgmt_ie; 1062 const u8 *ies; 1063 size_t ie_len; 1064 int ret; 1065 u16 reason = 0; 1066 1067 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED) 1068 return; 1069 1070 action_field = mgmt->u.action.u.slf_prot_action.action; 1071 if (action_field != PLINK_OPEN && 1072 action_field != PLINK_CONFIRM && 1073 action_field != PLINK_CLOSE) 1074 return; 1075 1076 ies = mgmt->u.action.u.slf_prot_action.variable; 1077 ie_len = (const u8 *) mgmt + len - 1078 mgmt->u.action.u.slf_prot_action.variable; 1079 1080 /* at least expect mesh id and peering mgmt */ 1081 if (ie_len < 2 + 2) { 1082 wpa_printf(MSG_DEBUG, 1083 "MPM: Ignore too short action frame %u ie_len %u", 1084 action_field, (unsigned int) ie_len); 1085 return; 1086 } 1087 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field); 1088 1089 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) { 1090 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x", 1091 WPA_GET_LE16(ies)); 1092 ies += 2; /* capability */ 1093 ie_len -= 2; 1094 } 1095 if (action_field == PLINK_CONFIRM) { 1096 aid = WPA_GET_LE16(ies); 1097 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid); 1098 ies += 2; /* aid */ 1099 ie_len -= 2; 1100 } 1101 1102 /* check for mesh peering, mesh id and mesh config IEs */ 1103 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) { 1104 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs"); 1105 return; 1106 } 1107 if (!elems.peer_mgmt) { 1108 wpa_printf(MSG_DEBUG, 1109 "MPM: No Mesh Peering Management element"); 1110 return; 1111 } 1112 if (action_field != PLINK_CLOSE) { 1113 if (!elems.mesh_id || !elems.mesh_config) { 1114 wpa_printf(MSG_DEBUG, 1115 "MPM: No Mesh ID or Mesh Configuration element"); 1116 return; 1117 } 1118 1119 if (!matches_local(wpa_s, &elems)) { 1120 wpa_printf(MSG_DEBUG, 1121 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS"); 1122 return; 1123 } 1124 } 1125 1126 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field, 1127 elems.peer_mgmt, 1128 elems.peer_mgmt_len, 1129 &peer_mgmt_ie); 1130 if (ret) { 1131 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame"); 1132 return; 1133 } 1134 1135 /* the sender's llid is our plid and vice-versa */ 1136 plid = WPA_GET_LE16(peer_mgmt_ie.llid); 1137 if (peer_mgmt_ie.plid) 1138 llid = WPA_GET_LE16(peer_mgmt_ie.plid); 1139 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid); 1140 1141 if (action_field == PLINK_CLOSE) 1142 wpa_printf(MSG_DEBUG, "MPM: close reason=%u", 1143 WPA_GET_LE16(peer_mgmt_ie.reason)); 1144 1145 sta = ap_get_sta(hapd, mgmt->sa); 1146 1147 /* 1148 * If this is an open frame from an unknown STA, and this is an 1149 * open mesh, then go ahead and add the peer before proceeding. 1150 */ 1151 if (!sta && action_field == PLINK_OPEN && 1152 (!(mconf->security & MESH_CONF_SEC_AMPE) || 1153 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL))) 1154 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems); 1155 1156 if (!sta) { 1157 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer"); 1158 return; 1159 } 1160 1161 #ifdef CONFIG_SAE 1162 /* peer is in sae_accepted? */ 1163 if (sta->sae && sta->sae->state != SAE_ACCEPTED) { 1164 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer"); 1165 return; 1166 } 1167 #endif /* CONFIG_SAE */ 1168 1169 if (!sta->my_lid) 1170 mesh_mpm_init_link(wpa_s, sta); 1171 1172 if (mconf->security & MESH_CONF_SEC_AMPE) { 1173 int res; 1174 1175 res = mesh_rsn_process_ampe(wpa_s, sta, &elems, 1176 &mgmt->u.action.category, 1177 peer_mgmt_ie.chosen_pmk, 1178 ies, ie_len); 1179 if (res) { 1180 wpa_printf(MSG_DEBUG, 1181 "MPM: RSN process rejected frame (res=%d)", 1182 res); 1183 if (action_field == PLINK_OPEN && res == -2) { 1184 /* AES-SIV decryption failed */ 1185 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT, 1186 WLAN_REASON_MESH_INVALID_GTK); 1187 } 1188 return; 1189 } 1190 } 1191 1192 if (sta->plink_state == PLINK_BLOCKED) { 1193 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED"); 1194 return; 1195 } 1196 1197 /* Now we will figure out the appropriate event... */ 1198 switch (action_field) { 1199 case PLINK_OPEN: 1200 if (plink_free_count(hapd) == 0) { 1201 event = REQ_RJCT; 1202 reason = WLAN_REASON_MESH_MAX_PEERS; 1203 wpa_printf(MSG_INFO, 1204 "MPM: Peer link num over quota(%d)", 1205 hapd->max_plinks); 1206 } else if (sta->peer_lid && sta->peer_lid != plid) { 1207 wpa_printf(MSG_DEBUG, 1208 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1209 sta->peer_lid, plid); 1210 return; /* no FSM event */ 1211 } else { 1212 sta->peer_lid = plid; 1213 event = OPN_ACPT; 1214 } 1215 break; 1216 case PLINK_CONFIRM: 1217 if (plink_free_count(hapd) == 0) { 1218 event = REQ_RJCT; 1219 reason = WLAN_REASON_MESH_MAX_PEERS; 1220 wpa_printf(MSG_INFO, 1221 "MPM: Peer link num over quota(%d)", 1222 hapd->max_plinks); 1223 } else if (sta->my_lid != llid || 1224 (sta->peer_lid && sta->peer_lid != plid)) { 1225 wpa_printf(MSG_DEBUG, 1226 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x", 1227 sta->my_lid, llid, sta->peer_lid, plid); 1228 return; /* no FSM event */ 1229 } else { 1230 if (!sta->peer_lid) 1231 sta->peer_lid = plid; 1232 sta->peer_aid = aid; 1233 event = CNF_ACPT; 1234 } 1235 break; 1236 case PLINK_CLOSE: 1237 if (sta->plink_state == PLINK_ESTAB) 1238 /* Do not check for llid or plid. This does not 1239 * follow the standard but since multiple plinks 1240 * per cand are not supported, it is necessary in 1241 * order to avoid a livelock when MP A sees an 1242 * establish peer link to MP B but MP B does not 1243 * see it. This can be caused by a timeout in 1244 * B's peer link establishment or B being 1245 * restarted. 1246 */ 1247 event = CLS_ACPT; 1248 else if (sta->peer_lid != plid) { 1249 wpa_printf(MSG_DEBUG, 1250 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1251 sta->peer_lid, plid); 1252 return; /* no FSM event */ 1253 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) { 1254 wpa_printf(MSG_DEBUG, 1255 "MPM: my_lid mismatch: 0x%x != 0x%x", 1256 sta->my_lid, llid); 1257 return; /* no FSM event */ 1258 } else { 1259 event = CLS_ACPT; 1260 } 1261 break; 1262 default: 1263 /* 1264 * This cannot be hit due to the action_field check above, but 1265 * compilers may not be able to figure that out and can warn 1266 * about uninitialized event below. 1267 */ 1268 return; 1269 } 1270 mesh_mpm_fsm(wpa_s, sta, event, reason); 1271 } 1272 1273 1274 /* called by ap_free_sta */ 1275 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta) 1276 { 1277 if (sta->plink_state == PLINK_ESTAB) 1278 hapd->num_plinks--; 1279 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta); 1280 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta); 1281 } 1282
