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 #include "notify.h" 24 25 struct mesh_peer_mgmt_ie { 26 const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */ 27 const u8 *llid; /* Local Link ID (2 octets) */ 28 const u8 *plid; /* Peer Link ID (conditional, 2 octets) */ 29 const u8 *reason; /* Reason Code (conditional, 2 octets) */ 30 const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */ 31 }; 32 33 static void plink_timer(void *eloop_ctx, void *user_data); 34 35 36 enum plink_event { 37 PLINK_UNDEFINED, 38 OPN_ACPT, 39 OPN_RJCT, 40 CNF_ACPT, 41 CNF_RJCT, 42 CLS_ACPT, 43 REQ_RJCT 44 }; 45 46 static const char * const mplstate[] = { 47 [0] = "UNINITIALIZED", 48 [PLINK_IDLE] = "IDLE", 49 [PLINK_OPN_SNT] = "OPN_SNT", 50 [PLINK_OPN_RCVD] = "OPN_RCVD", 51 [PLINK_CNF_RCVD] = "CNF_RCVD", 52 [PLINK_ESTAB] = "ESTAB", 53 [PLINK_HOLDING] = "HOLDING", 54 [PLINK_BLOCKED] = "BLOCKED" 55 }; 56 57 static const char * const mplevent[] = { 58 [PLINK_UNDEFINED] = "UNDEFINED", 59 [OPN_ACPT] = "OPN_ACPT", 60 [OPN_RJCT] = "OPN_RJCT", 61 [CNF_ACPT] = "CNF_ACPT", 62 [CNF_RJCT] = "CNF_RJCT", 63 [CLS_ACPT] = "CLS_ACPT", 64 [REQ_RJCT] = "REQ_RJCT", 65 }; 66 67 68 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s, 69 u8 action_field, 70 const u8 *ie, size_t len, 71 struct mesh_peer_mgmt_ie *mpm_ie) 72 { 73 os_memset(mpm_ie, 0, sizeof(*mpm_ie)); 74 75 /* Remove optional Chosen PMK field at end */ 76 if (len >= SAE_PMKID_LEN) { 77 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN; 78 len -= SAE_PMKID_LEN; 79 } 80 81 if ((action_field == PLINK_OPEN && len != 4) || 82 (action_field == PLINK_CONFIRM && len != 6) || 83 (action_field == PLINK_CLOSE && len != 6 && len != 8)) { 84 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie"); 85 return -1; 86 } 87 88 /* required fields */ 89 if (len < 4) 90 return -1; 91 mpm_ie->proto_id = ie; 92 mpm_ie->llid = ie + 2; 93 ie += 4; 94 len -= 4; 95 96 /* close reason is always present at end for close */ 97 if (action_field == PLINK_CLOSE) { 98 if (len < 2) 99 return -1; 100 mpm_ie->reason = ie + len - 2; 101 len -= 2; 102 } 103 104 /* Peer Link ID, present for confirm, and possibly close */ 105 if (len >= 2) 106 mpm_ie->plid = ie; 107 108 return 0; 109 } 110 111 112 static int plink_free_count(struct hostapd_data *hapd) 113 { 114 if (hapd->max_plinks > hapd->num_plinks) 115 return hapd->max_plinks - hapd->num_plinks; 116 return 0; 117 } 118 119 120 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s, 121 struct sta_info *sta, 122 struct ieee802_11_elems *elems) 123 { 124 if (!elems->supp_rates) { 125 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR, 126 MAC2STR(sta->addr)); 127 return WLAN_STATUS_UNSPECIFIED_FAILURE; 128 } 129 130 if (elems->supp_rates_len + elems->ext_supp_rates_len > 131 sizeof(sta->supported_rates)) { 132 wpa_msg(wpa_s, MSG_ERROR, 133 "Invalid supported rates element length " MACSTR 134 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len, 135 elems->ext_supp_rates_len); 136 return WLAN_STATUS_UNSPECIFIED_FAILURE; 137 } 138 139 sta->supported_rates_len = merge_byte_arrays( 140 sta->supported_rates, sizeof(sta->supported_rates), 141 elems->supp_rates, elems->supp_rates_len, 142 elems->ext_supp_rates, elems->ext_supp_rates_len); 143 144 return WLAN_STATUS_SUCCESS; 145 } 146 147 148 /* return true if elems from a neighbor match this MBSS */ 149 static Boolean matches_local(struct wpa_supplicant *wpa_s, 150 struct ieee802_11_elems *elems) 151 { 152 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 153 154 if (elems->mesh_config_len < 5) 155 return FALSE; 156 157 return (mconf->meshid_len == elems->mesh_id_len && 158 os_memcmp(mconf->meshid, elems->mesh_id, 159 elems->mesh_id_len) == 0 && 160 mconf->mesh_pp_id == elems->mesh_config[0] && 161 mconf->mesh_pm_id == elems->mesh_config[1] && 162 mconf->mesh_cc_id == elems->mesh_config[2] && 163 mconf->mesh_sp_id == elems->mesh_config[3] && 164 mconf->mesh_auth_id == elems->mesh_config[4]); 165 } 166 167 168 /* check if local link id is already used with another peer */ 169 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid) 170 { 171 struct sta_info *sta; 172 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 173 174 for (sta = hapd->sta_list; sta; sta = sta->next) { 175 if (sta->my_lid == llid) 176 return TRUE; 177 } 178 179 return FALSE; 180 } 181 182 183 /* generate an llid for a link and set to initial state */ 184 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s, 185 struct sta_info *sta) 186 { 187 u16 llid; 188 189 do { 190 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0) 191 continue; 192 } while (!llid || llid_in_use(wpa_s, llid)); 193 194 sta->my_lid = llid; 195 sta->peer_lid = 0; 196 sta->peer_aid = 0; 197 198 /* 199 * We do not use wpa_mesh_set_plink_state() here because there is no 200 * entry in kernel yet. 201 */ 202 sta->plink_state = PLINK_IDLE; 203 } 204 205 206 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s, 207 struct sta_info *sta, 208 enum plink_action_field type, 209 u16 close_reason) 210 { 211 struct wpabuf *buf; 212 struct hostapd_iface *ifmsh = wpa_s->ifmsh; 213 struct hostapd_data *bss = ifmsh->bss[0]; 214 struct mesh_conf *conf = ifmsh->mconf; 215 u8 supp_rates[2 + 2 + 32]; 216 u8 *pos, *cat; 217 u8 ie_len, add_plid = 0; 218 int ret; 219 int ampe = conf->security & MESH_CONF_SEC_AMPE; 220 size_t buf_len; 221 222 if (!sta) 223 return; 224 225 buf_len = 2 + /* capability info */ 226 2 + /* AID */ 227 2 + 8 + /* supported rates */ 228 2 + (32 - 8) + 229 2 + 32 + /* mesh ID */ 230 2 + 7 + /* mesh config */ 231 2 + 23 + /* peering management */ 232 2 + 96 + /* AMPE */ 233 2 + 16; /* MIC */ 234 #ifdef CONFIG_IEEE80211N 235 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 236 buf_len += 2 + 26 + /* HT capabilities */ 237 2 + 22; /* HT operation */ 238 } 239 #endif /* CONFIG_IEEE80211N */ 240 #ifdef CONFIG_IEEE80211AC 241 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 242 buf_len += 2 + 12 + /* VHT Capabilities */ 243 2 + 5; /* VHT Operation */ 244 } 245 #endif /* CONFIG_IEEE80211AC */ 246 if (type != PLINK_CLOSE) 247 buf_len += conf->rsn_ie_len; /* RSN IE */ 248 249 buf = wpabuf_alloc(buf_len); 250 if (!buf) 251 return; 252 253 cat = wpabuf_mhead_u8(buf); 254 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED); 255 wpabuf_put_u8(buf, type); 256 257 if (type != PLINK_CLOSE) { 258 u8 info; 259 260 /* capability info */ 261 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0); 262 263 /* aid */ 264 if (type == PLINK_CONFIRM) 265 wpabuf_put_le16(buf, sta->aid); 266 267 /* IE: supp + ext. supp rates */ 268 pos = hostapd_eid_supp_rates(bss, supp_rates); 269 pos = hostapd_eid_ext_supp_rates(bss, pos); 270 wpabuf_put_data(buf, supp_rates, pos - supp_rates); 271 272 /* IE: RSN IE */ 273 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len); 274 275 /* IE: Mesh ID */ 276 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 277 wpabuf_put_u8(buf, conf->meshid_len); 278 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 279 280 /* IE: mesh conf */ 281 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG); 282 wpabuf_put_u8(buf, 7); 283 wpabuf_put_u8(buf, conf->mesh_pp_id); 284 wpabuf_put_u8(buf, conf->mesh_pm_id); 285 wpabuf_put_u8(buf, conf->mesh_cc_id); 286 wpabuf_put_u8(buf, conf->mesh_sp_id); 287 wpabuf_put_u8(buf, conf->mesh_auth_id); 288 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1; 289 /* TODO: Add Connected to Mesh Gate/AS subfields */ 290 wpabuf_put_u8(buf, info); 291 /* always forwarding & accepting plinks for now */ 292 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER | 293 MESH_CAP_FORWARDING); 294 } else { /* Peer closing frame */ 295 /* IE: Mesh ID */ 296 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 297 wpabuf_put_u8(buf, conf->meshid_len); 298 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 299 } 300 301 /* IE: Mesh Peering Management element */ 302 ie_len = 4; 303 if (ampe) 304 ie_len += PMKID_LEN; 305 switch (type) { 306 case PLINK_OPEN: 307 break; 308 case PLINK_CONFIRM: 309 ie_len += 2; 310 add_plid = 1; 311 break; 312 case PLINK_CLOSE: 313 ie_len += 2; 314 add_plid = 1; 315 ie_len += 2; /* reason code */ 316 break; 317 } 318 319 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT); 320 wpabuf_put_u8(buf, ie_len); 321 /* peering protocol */ 322 if (ampe) 323 wpabuf_put_le16(buf, 1); 324 else 325 wpabuf_put_le16(buf, 0); 326 wpabuf_put_le16(buf, sta->my_lid); 327 if (add_plid) 328 wpabuf_put_le16(buf, sta->peer_lid); 329 if (type == PLINK_CLOSE) 330 wpabuf_put_le16(buf, close_reason); 331 if (ampe) { 332 if (sta->sae == NULL) { 333 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session"); 334 goto fail; 335 } 336 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta, 337 wpabuf_put(buf, PMKID_LEN)); 338 } 339 340 #ifdef CONFIG_IEEE80211N 341 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 342 u8 ht_capa_oper[2 + 26 + 2 + 22]; 343 344 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper); 345 pos = hostapd_eid_ht_operation(bss, pos); 346 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper); 347 } 348 #endif /* CONFIG_IEEE80211N */ 349 #ifdef CONFIG_IEEE80211AC 350 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 351 u8 vht_capa_oper[2 + 12 + 2 + 5]; 352 353 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0); 354 pos = hostapd_eid_vht_operation(bss, pos); 355 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper); 356 } 357 #endif /* CONFIG_IEEE80211AC */ 358 359 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) { 360 wpa_msg(wpa_s, MSG_INFO, 361 "Mesh MPM: failed to add AMPE and MIC IE"); 362 goto fail; 363 } 364 365 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to " 366 MACSTR " (my_lid=0x%x peer_lid=0x%x)", 367 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid); 368 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, 369 sta->addr, wpa_s->own_addr, wpa_s->own_addr, 370 wpabuf_head(buf), wpabuf_len(buf), 0); 371 if (ret < 0) 372 wpa_msg(wpa_s, MSG_INFO, 373 "Mesh MPM: failed to send peering frame"); 374 375 fail: 376 wpabuf_free(buf); 377 } 378 379 380 /* configure peering state in ours and driver's station entry */ 381 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, 382 struct sta_info *sta, 383 enum mesh_plink_state state) 384 { 385 struct hostapd_sta_add_params params; 386 int ret; 387 388 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s", 389 MAC2STR(sta->addr), mplstate[sta->plink_state], 390 mplstate[state]); 391 sta->plink_state = state; 392 393 os_memset(¶ms, 0, sizeof(params)); 394 params.addr = sta->addr; 395 params.plink_state = state; 396 params.peer_aid = sta->peer_aid; 397 params.set = 1; 398 399 ret = wpa_drv_sta_add(wpa_s, ¶ms); 400 if (ret) { 401 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR 402 ": %d", MAC2STR(sta->addr), ret); 403 } 404 } 405 406 407 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s, 408 struct sta_info *sta) 409 { 410 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 411 412 eloop_cancel_timeout(plink_timer, wpa_s, sta); 413 414 ap_free_sta(hapd, sta); 415 } 416 417 418 static void plink_timer(void *eloop_ctx, void *user_data) 419 { 420 struct wpa_supplicant *wpa_s = eloop_ctx; 421 struct sta_info *sta = user_data; 422 u16 reason = 0; 423 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 424 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 425 426 switch (sta->plink_state) { 427 case PLINK_OPN_RCVD: 428 case PLINK_OPN_SNT: 429 /* retry timer */ 430 if (sta->mpm_retries < conf->dot11MeshMaxRetries) { 431 eloop_register_timeout( 432 conf->dot11MeshRetryTimeout / 1000, 433 (conf->dot11MeshRetryTimeout % 1000) * 1000, 434 plink_timer, wpa_s, sta); 435 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 436 sta->mpm_retries++; 437 break; 438 } 439 reason = WLAN_REASON_MESH_MAX_RETRIES; 440 /* fall through on else */ 441 442 case PLINK_CNF_RCVD: 443 /* confirm timer */ 444 if (!reason) 445 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT; 446 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 447 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000, 448 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 449 plink_timer, wpa_s, sta); 450 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 451 break; 452 case PLINK_HOLDING: 453 /* holding timer */ 454 455 if (sta->mesh_sae_pmksa_caching) { 456 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR 457 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it", 458 MAC2STR(sta->addr)); 459 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 460 } 461 mesh_mpm_fsm_restart(wpa_s, sta); 462 break; 463 default: 464 break; 465 } 466 } 467 468 469 /* initiate peering with station */ 470 static void 471 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta, 472 enum mesh_plink_state next_state) 473 { 474 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 475 476 eloop_cancel_timeout(plink_timer, wpa_s, sta); 477 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000, 478 (conf->dot11MeshRetryTimeout % 1000) * 1000, 479 plink_timer, wpa_s, sta); 480 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 481 wpa_mesh_set_plink_state(wpa_s, sta, next_state); 482 } 483 484 485 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta, 486 void *ctx) 487 { 488 struct wpa_supplicant *wpa_s = ctx; 489 int reason = WLAN_REASON_MESH_PEERING_CANCELLED; 490 491 if (sta) { 492 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 493 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 494 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR, 495 MAC2STR(sta->addr)); 496 eloop_cancel_timeout(plink_timer, wpa_s, sta); 497 return 0; 498 } 499 500 return 1; 501 } 502 503 504 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 505 { 506 struct hostapd_data *hapd; 507 struct sta_info *sta; 508 509 if (!wpa_s->ifmsh) { 510 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 511 return -1; 512 } 513 514 hapd = wpa_s->ifmsh->bss[0]; 515 sta = ap_get_sta(hapd, addr); 516 if (!sta) { 517 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 518 return -1; 519 } 520 521 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1; 522 } 523 524 525 static void peer_add_timer(void *eloop_ctx, void *user_data) 526 { 527 struct wpa_supplicant *wpa_s = eloop_ctx; 528 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 529 530 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN); 531 } 532 533 534 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 535 int duration) 536 { 537 struct wpa_ssid *ssid = wpa_s->current_ssid; 538 struct hostapd_data *hapd; 539 struct sta_info *sta; 540 struct mesh_conf *conf; 541 542 if (!wpa_s->ifmsh) { 543 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 544 return -1; 545 } 546 547 if (!ssid || !ssid->no_auto_peer) { 548 wpa_msg(wpa_s, MSG_INFO, 549 "This command is available only with no_auto_peer mesh network"); 550 return -1; 551 } 552 553 hapd = wpa_s->ifmsh->bss[0]; 554 conf = wpa_s->ifmsh->mconf; 555 556 sta = ap_get_sta(hapd, addr); 557 if (!sta) { 558 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 559 return -1; 560 } 561 562 if ((PLINK_OPN_SNT <= sta->plink_state && 563 sta->plink_state <= PLINK_ESTAB) || 564 (sta->sae && sta->sae->state > SAE_NOTHING)) { 565 wpa_msg(wpa_s, MSG_INFO, 566 "Specified peer is connecting/connected"); 567 return -1; 568 } 569 570 if (conf->security == MESH_CONF_SEC_NONE) { 571 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 572 } else { 573 mesh_rsn_auth_sae_sta(wpa_s, sta); 574 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN); 575 eloop_register_timeout(duration == -1 ? 10 : duration, 0, 576 peer_add_timer, wpa_s, NULL); 577 } 578 579 return 0; 580 } 581 582 583 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh) 584 { 585 struct hostapd_data *hapd = ifmsh->bss[0]; 586 587 /* notify peers we're leaving */ 588 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s); 589 590 hapd->num_plinks = 0; 591 hostapd_free_stas(hapd); 592 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 593 } 594 595 596 /* for mesh_rsn to indicate this peer has completed authentication, and we're 597 * ready to start AMPE */ 598 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 599 { 600 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 601 struct hostapd_sta_add_params params; 602 struct sta_info *sta; 603 int ret; 604 605 sta = ap_get_sta(data, addr); 606 if (!sta) { 607 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer"); 608 return; 609 } 610 611 /* TODO: Should do nothing if this STA is already authenticated, but 612 * the AP code already sets this flag. */ 613 sta->flags |= WLAN_STA_AUTH; 614 615 mesh_rsn_init_ampe_sta(wpa_s, sta); 616 617 os_memset(¶ms, 0, sizeof(params)); 618 params.addr = sta->addr; 619 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED; 620 params.set = 1; 621 622 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR, 623 MAC2STR(sta->addr)); 624 ret = wpa_drv_sta_add(wpa_s, ¶ms); 625 if (ret) { 626 wpa_msg(wpa_s, MSG_ERROR, 627 "Driver failed to set " MACSTR ": %d", 628 MAC2STR(sta->addr), ret); 629 } 630 631 if (!sta->my_lid) 632 mesh_mpm_init_link(wpa_s, sta); 633 634 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 635 } 636 637 /* 638 * Initialize a sta_info structure for a peer and upload it into the driver 639 * in preparation for beginning authentication or peering. This is done when a 640 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is 641 * received from the peer for the first time. 642 */ 643 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s, 644 const u8 *addr, 645 struct ieee802_11_elems *elems) 646 { 647 struct hostapd_sta_add_params params; 648 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 649 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 650 struct sta_info *sta; 651 #ifdef CONFIG_IEEE80211N 652 struct ieee80211_ht_operation *oper; 653 #endif /* CONFIG_IEEE80211N */ 654 int ret; 655 656 if (elems->mesh_config_len >= 7 && 657 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) { 658 wpa_msg(wpa_s, MSG_DEBUG, 659 "mesh: Ignore a crowded peer " MACSTR, 660 MAC2STR(addr)); 661 return NULL; 662 } 663 664 sta = ap_get_sta(data, addr); 665 if (!sta) { 666 sta = ap_sta_add(data, addr); 667 if (!sta) 668 return NULL; 669 } 670 671 /* Set WMM by default since Mesh STAs are QoS STAs */ 672 sta->flags |= WLAN_STA_WMM; 673 674 /* initialize sta */ 675 if (copy_supp_rates(wpa_s, sta, elems)) { 676 ap_free_sta(data, sta); 677 return NULL; 678 } 679 680 if (!sta->my_lid) 681 mesh_mpm_init_link(wpa_s, sta); 682 683 #ifdef CONFIG_IEEE80211N 684 copy_sta_ht_capab(data, sta, elems->ht_capabilities); 685 686 oper = (struct ieee80211_ht_operation *) elems->ht_operation; 687 if (oper && 688 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) && 689 sta->ht_capabilities) { 690 wpa_msg(wpa_s, MSG_DEBUG, MACSTR 691 " does not support 40 MHz bandwidth", 692 MAC2STR(sta->addr)); 693 set_disable_ht40(sta->ht_capabilities, 1); 694 } 695 696 update_ht_state(data, sta); 697 #endif /* CONFIG_IEEE80211N */ 698 699 #ifdef CONFIG_IEEE80211AC 700 copy_sta_vht_capab(data, sta, elems->vht_capabilities); 701 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif); 702 #endif /* CONFIG_IEEE80211AC */ 703 704 if (hostapd_get_aid(data, sta) < 0) { 705 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available"); 706 ap_free_sta(data, sta); 707 return NULL; 708 } 709 710 /* insert into driver */ 711 os_memset(¶ms, 0, sizeof(params)); 712 params.supp_rates = sta->supported_rates; 713 params.supp_rates_len = sta->supported_rates_len; 714 params.addr = addr; 715 params.plink_state = sta->plink_state; 716 params.aid = sta->aid; 717 params.peer_aid = sta->peer_aid; 718 params.listen_interval = 100; 719 params.ht_capabilities = sta->ht_capabilities; 720 params.vht_capabilities = sta->vht_capabilities; 721 params.flags |= WPA_STA_WMM; 722 params.flags_mask |= WPA_STA_AUTHENTICATED; 723 if (conf->security == MESH_CONF_SEC_NONE) { 724 params.flags |= WPA_STA_AUTHORIZED; 725 params.flags |= WPA_STA_AUTHENTICATED; 726 } else { 727 sta->flags |= WLAN_STA_MFP; 728 params.flags |= WPA_STA_MFP; 729 } 730 731 ret = wpa_drv_sta_add(wpa_s, ¶ms); 732 if (ret) { 733 wpa_msg(wpa_s, MSG_ERROR, 734 "Driver failed to insert " MACSTR ": %d", 735 MAC2STR(addr), ret); 736 ap_free_sta(data, sta); 737 return NULL; 738 } 739 740 return sta; 741 } 742 743 744 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 745 struct ieee802_11_elems *elems) 746 { 747 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 748 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 749 struct sta_info *sta; 750 struct wpa_ssid *ssid = wpa_s->current_ssid; 751 752 sta = mesh_mpm_add_peer(wpa_s, addr, elems); 753 if (!sta) 754 return; 755 756 if (ssid && ssid->no_auto_peer && 757 (is_zero_ether_addr(data->mesh_required_peer) || 758 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) { 759 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with " 760 MACSTR " because of no_auto_peer", MAC2STR(addr)); 761 if (data->mesh_pending_auth) { 762 struct os_reltime age; 763 const struct ieee80211_mgmt *mgmt; 764 struct hostapd_frame_info fi; 765 766 mgmt = wpabuf_head(data->mesh_pending_auth); 767 os_reltime_age(&data->mesh_pending_auth_time, &age); 768 if (age.sec < 2 && 769 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) { 770 wpa_printf(MSG_DEBUG, 771 "mesh: Process pending Authentication frame from %u.%06u seconds ago", 772 (unsigned int) age.sec, 773 (unsigned int) age.usec); 774 os_memset(&fi, 0, sizeof(fi)); 775 ieee802_11_mgmt( 776 data, 777 wpabuf_head(data->mesh_pending_auth), 778 wpabuf_len(data->mesh_pending_auth), 779 &fi); 780 } 781 wpabuf_free(data->mesh_pending_auth); 782 data->mesh_pending_auth = NULL; 783 } 784 return; 785 } 786 787 if (conf->security == MESH_CONF_SEC_NONE) { 788 if (sta->plink_state < PLINK_OPN_SNT || 789 sta->plink_state > PLINK_ESTAB) 790 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 791 } else { 792 mesh_rsn_auth_sae_sta(wpa_s, sta); 793 } 794 } 795 796 797 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt) 798 { 799 struct hostapd_frame_info fi; 800 801 os_memset(&fi, 0, sizeof(fi)); 802 fi.datarate = rx_mgmt->datarate; 803 fi.ssi_signal = rx_mgmt->ssi_signal; 804 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame, 805 rx_mgmt->frame_len, &fi); 806 } 807 808 809 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s, 810 struct sta_info *sta) 811 { 812 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 813 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 814 u8 seq[6] = {}; 815 816 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established", 817 MAC2STR(sta->addr)); 818 819 if (conf->security & MESH_CONF_SEC_AMPE) { 820 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len); 821 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher), 822 sta->addr, 0, 0, seq, sizeof(seq), 823 sta->mtk, sta->mtk_len); 824 825 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC", 826 sta->mgtk_rsc, sizeof(sta->mgtk_rsc)); 827 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK", 828 sta->mgtk, sta->mgtk_len); 829 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher), 830 sta->addr, sta->mgtk_key_id, 0, 831 sta->mgtk_rsc, sizeof(sta->mgtk_rsc), 832 sta->mgtk, sta->mgtk_len); 833 834 if (sta->igtk_len) { 835 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC", 836 sta->igtk_rsc, sizeof(sta->igtk_rsc)); 837 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK", 838 sta->igtk, sta->igtk_len); 839 wpa_drv_set_key( 840 wpa_s, 841 wpa_cipher_to_alg(conf->mgmt_group_cipher), 842 sta->addr, sta->igtk_key_id, 0, 843 sta->igtk_rsc, sizeof(sta->igtk_rsc), 844 sta->igtk, sta->igtk_len); 845 } 846 } 847 848 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB); 849 hapd->num_plinks++; 850 851 sta->flags |= WLAN_STA_ASSOC; 852 sta->mesh_sae_pmksa_caching = 0; 853 854 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 855 peer_add_timer(wpa_s, NULL); 856 eloop_cancel_timeout(plink_timer, wpa_s, sta); 857 858 /* Send ctrl event */ 859 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR, 860 MAC2STR(sta->addr)); 861 862 /* Send D-Bus event */ 863 wpas_notify_mesh_peer_connected(wpa_s, sta->addr); 864 } 865 866 867 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta, 868 enum plink_event event, u16 reason) 869 { 870 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 871 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 872 873 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s", 874 MAC2STR(sta->addr), mplstate[sta->plink_state], 875 mplevent[event]); 876 877 switch (sta->plink_state) { 878 case PLINK_IDLE: 879 switch (event) { 880 case CLS_ACPT: 881 mesh_mpm_fsm_restart(wpa_s, sta); 882 break; 883 case OPN_ACPT: 884 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD); 885 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 886 0); 887 break; 888 case REQ_RJCT: 889 mesh_mpm_send_plink_action(wpa_s, sta, 890 PLINK_CLOSE, reason); 891 break; 892 default: 893 break; 894 } 895 break; 896 case PLINK_OPN_SNT: 897 switch (event) { 898 case OPN_RJCT: 899 case CNF_RJCT: 900 if (!reason) 901 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 902 /* fall-through */ 903 case CLS_ACPT: 904 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 905 if (!reason) 906 reason = WLAN_REASON_MESH_CLOSE_RCVD; 907 eloop_register_timeout( 908 conf->dot11MeshHoldingTimeout / 1000, 909 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 910 plink_timer, wpa_s, sta); 911 mesh_mpm_send_plink_action(wpa_s, sta, 912 PLINK_CLOSE, reason); 913 break; 914 case OPN_ACPT: 915 /* retry timer is left untouched */ 916 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD); 917 mesh_mpm_send_plink_action(wpa_s, sta, 918 PLINK_CONFIRM, 0); 919 break; 920 case CNF_ACPT: 921 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD); 922 eloop_cancel_timeout(plink_timer, wpa_s, sta); 923 eloop_register_timeout( 924 conf->dot11MeshConfirmTimeout / 1000, 925 (conf->dot11MeshConfirmTimeout % 1000) * 1000, 926 plink_timer, wpa_s, sta); 927 break; 928 default: 929 break; 930 } 931 break; 932 case PLINK_OPN_RCVD: 933 switch (event) { 934 case OPN_RJCT: 935 case CNF_RJCT: 936 if (!reason) 937 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 938 /* fall-through */ 939 case CLS_ACPT: 940 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 941 if (!reason) 942 reason = WLAN_REASON_MESH_CLOSE_RCVD; 943 eloop_register_timeout( 944 conf->dot11MeshHoldingTimeout / 1000, 945 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 946 plink_timer, wpa_s, sta); 947 sta->mpm_close_reason = reason; 948 mesh_mpm_send_plink_action(wpa_s, sta, 949 PLINK_CLOSE, reason); 950 break; 951 case OPN_ACPT: 952 mesh_mpm_send_plink_action(wpa_s, sta, 953 PLINK_CONFIRM, 0); 954 break; 955 case CNF_ACPT: 956 if (conf->security & MESH_CONF_SEC_AMPE) 957 mesh_rsn_derive_mtk(wpa_s, sta); 958 mesh_mpm_plink_estab(wpa_s, sta); 959 break; 960 default: 961 break; 962 } 963 break; 964 case PLINK_CNF_RCVD: 965 switch (event) { 966 case OPN_RJCT: 967 case CNF_RJCT: 968 if (!reason) 969 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 970 /* fall-through */ 971 case CLS_ACPT: 972 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 973 if (!reason) 974 reason = WLAN_REASON_MESH_CLOSE_RCVD; 975 eloop_register_timeout( 976 conf->dot11MeshHoldingTimeout / 1000, 977 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 978 plink_timer, wpa_s, sta); 979 sta->mpm_close_reason = reason; 980 mesh_mpm_send_plink_action(wpa_s, sta, 981 PLINK_CLOSE, reason); 982 break; 983 case OPN_ACPT: 984 if (conf->security & MESH_CONF_SEC_AMPE) 985 mesh_rsn_derive_mtk(wpa_s, sta); 986 mesh_mpm_plink_estab(wpa_s, sta); 987 mesh_mpm_send_plink_action(wpa_s, sta, 988 PLINK_CONFIRM, 0); 989 break; 990 default: 991 break; 992 } 993 break; 994 case PLINK_ESTAB: 995 switch (event) { 996 case OPN_RJCT: 997 case CNF_RJCT: 998 case CLS_ACPT: 999 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 1000 if (!reason) 1001 reason = WLAN_REASON_MESH_CLOSE_RCVD; 1002 1003 eloop_register_timeout( 1004 conf->dot11MeshHoldingTimeout / 1000, 1005 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1006 plink_timer, wpa_s, sta); 1007 sta->mpm_close_reason = reason; 1008 1009 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR 1010 " closed with reason %d", 1011 MAC2STR(sta->addr), reason); 1012 1013 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR, 1014 MAC2STR(sta->addr)); 1015 1016 /* Send D-Bus event */ 1017 wpas_notify_mesh_peer_disconnected(wpa_s, sta->addr, 1018 reason); 1019 1020 hapd->num_plinks--; 1021 1022 mesh_mpm_send_plink_action(wpa_s, sta, 1023 PLINK_CLOSE, reason); 1024 break; 1025 case OPN_ACPT: 1026 mesh_mpm_send_plink_action(wpa_s, sta, 1027 PLINK_CONFIRM, 0); 1028 break; 1029 default: 1030 break; 1031 } 1032 break; 1033 case PLINK_HOLDING: 1034 switch (event) { 1035 case CLS_ACPT: 1036 mesh_mpm_fsm_restart(wpa_s, sta); 1037 break; 1038 case OPN_ACPT: 1039 case CNF_ACPT: 1040 case OPN_RJCT: 1041 case CNF_RJCT: 1042 reason = sta->mpm_close_reason; 1043 mesh_mpm_send_plink_action(wpa_s, sta, 1044 PLINK_CLOSE, reason); 1045 break; 1046 default: 1047 break; 1048 } 1049 break; 1050 default: 1051 wpa_msg(wpa_s, MSG_DEBUG, 1052 "Unsupported MPM event %s for state %s", 1053 mplevent[event], mplstate[sta->plink_state]); 1054 break; 1055 } 1056 } 1057 1058 1059 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s, 1060 const struct ieee80211_mgmt *mgmt, size_t len) 1061 { 1062 u8 action_field; 1063 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 1064 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 1065 struct sta_info *sta; 1066 u16 plid = 0, llid = 0, aid = 0; 1067 enum plink_event event; 1068 struct ieee802_11_elems elems; 1069 struct mesh_peer_mgmt_ie peer_mgmt_ie; 1070 const u8 *ies; 1071 size_t ie_len; 1072 int ret; 1073 u16 reason = 0; 1074 1075 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED) 1076 return; 1077 1078 action_field = mgmt->u.action.u.slf_prot_action.action; 1079 if (action_field != PLINK_OPEN && 1080 action_field != PLINK_CONFIRM && 1081 action_field != PLINK_CLOSE) 1082 return; 1083 1084 ies = mgmt->u.action.u.slf_prot_action.variable; 1085 ie_len = (const u8 *) mgmt + len - 1086 mgmt->u.action.u.slf_prot_action.variable; 1087 1088 /* at least expect mesh id and peering mgmt */ 1089 if (ie_len < 2 + 2) { 1090 wpa_printf(MSG_DEBUG, 1091 "MPM: Ignore too short action frame %u ie_len %u", 1092 action_field, (unsigned int) ie_len); 1093 return; 1094 } 1095 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field); 1096 1097 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) { 1098 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x", 1099 WPA_GET_LE16(ies)); 1100 ies += 2; /* capability */ 1101 ie_len -= 2; 1102 } 1103 if (action_field == PLINK_CONFIRM) { 1104 aid = WPA_GET_LE16(ies); 1105 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid); 1106 ies += 2; /* aid */ 1107 ie_len -= 2; 1108 } 1109 1110 /* check for mesh peering, mesh id and mesh config IEs */ 1111 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) { 1112 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs"); 1113 return; 1114 } 1115 if (!elems.peer_mgmt) { 1116 wpa_printf(MSG_DEBUG, 1117 "MPM: No Mesh Peering Management element"); 1118 return; 1119 } 1120 if (action_field != PLINK_CLOSE) { 1121 if (!elems.mesh_id || !elems.mesh_config) { 1122 wpa_printf(MSG_DEBUG, 1123 "MPM: No Mesh ID or Mesh Configuration element"); 1124 return; 1125 } 1126 1127 if (!matches_local(wpa_s, &elems)) { 1128 wpa_printf(MSG_DEBUG, 1129 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS"); 1130 return; 1131 } 1132 } 1133 1134 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field, 1135 elems.peer_mgmt, 1136 elems.peer_mgmt_len, 1137 &peer_mgmt_ie); 1138 if (ret) { 1139 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame"); 1140 return; 1141 } 1142 1143 /* the sender's llid is our plid and vice-versa */ 1144 plid = WPA_GET_LE16(peer_mgmt_ie.llid); 1145 if (peer_mgmt_ie.plid) 1146 llid = WPA_GET_LE16(peer_mgmt_ie.plid); 1147 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid); 1148 1149 if (action_field == PLINK_CLOSE) 1150 wpa_printf(MSG_DEBUG, "MPM: close reason=%u", 1151 WPA_GET_LE16(peer_mgmt_ie.reason)); 1152 1153 sta = ap_get_sta(hapd, mgmt->sa); 1154 1155 /* 1156 * If this is an open frame from an unknown STA, and this is an 1157 * open mesh, then go ahead and add the peer before proceeding. 1158 */ 1159 if (!sta && action_field == PLINK_OPEN && 1160 (!(mconf->security & MESH_CONF_SEC_AMPE) || 1161 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL))) 1162 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems); 1163 1164 if (!sta) { 1165 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer"); 1166 return; 1167 } 1168 1169 #ifdef CONFIG_SAE 1170 /* peer is in sae_accepted? */ 1171 if (sta->sae && sta->sae->state != SAE_ACCEPTED) { 1172 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer"); 1173 return; 1174 } 1175 #endif /* CONFIG_SAE */ 1176 1177 if (!sta->my_lid) 1178 mesh_mpm_init_link(wpa_s, sta); 1179 1180 if (mconf->security & MESH_CONF_SEC_AMPE) { 1181 int res; 1182 1183 res = mesh_rsn_process_ampe(wpa_s, sta, &elems, 1184 &mgmt->u.action.category, 1185 peer_mgmt_ie.chosen_pmk, 1186 ies, ie_len); 1187 if (res) { 1188 wpa_printf(MSG_DEBUG, 1189 "MPM: RSN process rejected frame (res=%d)", 1190 res); 1191 if (action_field == PLINK_OPEN && res == -2) { 1192 /* AES-SIV decryption failed */ 1193 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT, 1194 WLAN_REASON_MESH_INVALID_GTK); 1195 } 1196 return; 1197 } 1198 } 1199 1200 if (sta->plink_state == PLINK_BLOCKED) { 1201 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED"); 1202 return; 1203 } 1204 1205 /* Now we will figure out the appropriate event... */ 1206 switch (action_field) { 1207 case PLINK_OPEN: 1208 if (plink_free_count(hapd) == 0) { 1209 event = REQ_RJCT; 1210 reason = WLAN_REASON_MESH_MAX_PEERS; 1211 wpa_printf(MSG_INFO, 1212 "MPM: Peer link num over quota(%d)", 1213 hapd->max_plinks); 1214 } else if (sta->peer_lid && sta->peer_lid != plid) { 1215 wpa_printf(MSG_DEBUG, 1216 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1217 sta->peer_lid, plid); 1218 return; /* no FSM event */ 1219 } else { 1220 sta->peer_lid = plid; 1221 event = OPN_ACPT; 1222 } 1223 break; 1224 case PLINK_CONFIRM: 1225 if (plink_free_count(hapd) == 0) { 1226 event = REQ_RJCT; 1227 reason = WLAN_REASON_MESH_MAX_PEERS; 1228 wpa_printf(MSG_INFO, 1229 "MPM: Peer link num over quota(%d)", 1230 hapd->max_plinks); 1231 } else if (sta->my_lid != llid || 1232 (sta->peer_lid && sta->peer_lid != plid)) { 1233 wpa_printf(MSG_DEBUG, 1234 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x", 1235 sta->my_lid, llid, sta->peer_lid, plid); 1236 return; /* no FSM event */ 1237 } else { 1238 if (!sta->peer_lid) 1239 sta->peer_lid = plid; 1240 sta->peer_aid = aid; 1241 event = CNF_ACPT; 1242 } 1243 break; 1244 case PLINK_CLOSE: 1245 if (sta->plink_state == PLINK_ESTAB) 1246 /* Do not check for llid or plid. This does not 1247 * follow the standard but since multiple plinks 1248 * per cand are not supported, it is necessary in 1249 * order to avoid a livelock when MP A sees an 1250 * establish peer link to MP B but MP B does not 1251 * see it. This can be caused by a timeout in 1252 * B's peer link establishment or B being 1253 * restarted. 1254 */ 1255 event = CLS_ACPT; 1256 else if (sta->peer_lid != plid) { 1257 wpa_printf(MSG_DEBUG, 1258 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1259 sta->peer_lid, plid); 1260 return; /* no FSM event */ 1261 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) { 1262 wpa_printf(MSG_DEBUG, 1263 "MPM: my_lid mismatch: 0x%x != 0x%x", 1264 sta->my_lid, llid); 1265 return; /* no FSM event */ 1266 } else { 1267 event = CLS_ACPT; 1268 } 1269 break; 1270 default: 1271 /* 1272 * This cannot be hit due to the action_field check above, but 1273 * compilers may not be able to figure that out and can warn 1274 * about uninitialized event below. 1275 */ 1276 return; 1277 } 1278 mesh_mpm_fsm(wpa_s, sta, event, reason); 1279 } 1280 1281 1282 /* called by ap_free_sta */ 1283 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta) 1284 { 1285 if (sta->plink_state == PLINK_ESTAB) 1286 hapd->num_plinks--; 1287 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta); 1288 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta); 1289 } 1290
