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 "common/ocv.h" 16 #include "ap/hostapd.h" 17 #include "ap/sta_info.h" 18 #include "ap/ieee802_11.h" 19 #include "ap/wpa_auth.h" 20 #include "wpa_supplicant_i.h" 21 #include "driver_i.h" 22 #include "mesh_mpm.h" 23 #include "mesh_rsn.h" 24 #include "notify.h" 25 26 struct mesh_peer_mgmt_ie { 27 const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */ 28 const u8 *llid; /* Local Link ID (2 octets) */ 29 const u8 *plid; /* Peer Link ID (conditional, 2 octets) */ 30 const u8 *reason; /* Reason Code (conditional, 2 octets) */ 31 const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */ 32 }; 33 34 static void plink_timer(void *eloop_ctx, void *user_data); 35 36 37 enum plink_event { 38 PLINK_UNDEFINED, 39 OPN_ACPT, 40 OPN_RJCT, 41 CNF_ACPT, 42 CNF_RJCT, 43 CLS_ACPT, 44 REQ_RJCT 45 }; 46 47 static const char * const mplstate[] = { 48 [0] = "UNINITIALIZED", 49 [PLINK_IDLE] = "IDLE", 50 [PLINK_OPN_SNT] = "OPN_SNT", 51 [PLINK_OPN_RCVD] = "OPN_RCVD", 52 [PLINK_CNF_RCVD] = "CNF_RCVD", 53 [PLINK_ESTAB] = "ESTAB", 54 [PLINK_HOLDING] = "HOLDING", 55 [PLINK_BLOCKED] = "BLOCKED" 56 }; 57 58 static const char * const mplevent[] = { 59 [PLINK_UNDEFINED] = "UNDEFINED", 60 [OPN_ACPT] = "OPN_ACPT", 61 [OPN_RJCT] = "OPN_RJCT", 62 [CNF_ACPT] = "CNF_ACPT", 63 [CNF_RJCT] = "CNF_RJCT", 64 [CLS_ACPT] = "CLS_ACPT", 65 [REQ_RJCT] = "REQ_RJCT", 66 }; 67 68 69 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s, 70 u8 action_field, 71 const u8 *ie, size_t len, 72 struct mesh_peer_mgmt_ie *mpm_ie) 73 { 74 os_memset(mpm_ie, 0, sizeof(*mpm_ie)); 75 76 /* Remove optional Chosen PMK field at end */ 77 if (len >= SAE_PMKID_LEN) { 78 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN; 79 len -= SAE_PMKID_LEN; 80 } 81 82 if ((action_field == PLINK_OPEN && len != 4) || 83 (action_field == PLINK_CONFIRM && len != 6) || 84 (action_field == PLINK_CLOSE && len != 6 && len != 8)) { 85 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie"); 86 return -1; 87 } 88 89 /* required fields */ 90 if (len < 4) 91 return -1; 92 mpm_ie->proto_id = ie; 93 mpm_ie->llid = ie + 2; 94 ie += 4; 95 len -= 4; 96 97 /* close reason is always present at end for close */ 98 if (action_field == PLINK_CLOSE) { 99 if (len < 2) 100 return -1; 101 mpm_ie->reason = ie + len - 2; 102 len -= 2; 103 } 104 105 /* Peer Link ID, present for confirm, and possibly close */ 106 if (len >= 2) 107 mpm_ie->plid = ie; 108 109 return 0; 110 } 111 112 113 static int plink_free_count(struct hostapd_data *hapd) 114 { 115 if (hapd->max_plinks > hapd->num_plinks) 116 return hapd->max_plinks - hapd->num_plinks; 117 return 0; 118 } 119 120 121 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s, 122 struct sta_info *sta, 123 struct ieee802_11_elems *elems) 124 { 125 if (!elems->supp_rates) { 126 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR, 127 MAC2STR(sta->addr)); 128 return WLAN_STATUS_UNSPECIFIED_FAILURE; 129 } 130 131 if (elems->supp_rates_len + elems->ext_supp_rates_len > 132 sizeof(sta->supported_rates)) { 133 wpa_msg(wpa_s, MSG_ERROR, 134 "Invalid supported rates element length " MACSTR 135 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len, 136 elems->ext_supp_rates_len); 137 return WLAN_STATUS_UNSPECIFIED_FAILURE; 138 } 139 140 sta->supported_rates_len = merge_byte_arrays( 141 sta->supported_rates, sizeof(sta->supported_rates), 142 elems->supp_rates, elems->supp_rates_len, 143 elems->ext_supp_rates, elems->ext_supp_rates_len); 144 145 return WLAN_STATUS_SUCCESS; 146 } 147 148 149 /* return true if elems from a neighbor match this MBSS */ 150 static Boolean matches_local(struct wpa_supplicant *wpa_s, 151 struct ieee802_11_elems *elems) 152 { 153 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 154 155 if (elems->mesh_config_len < 5) 156 return FALSE; 157 158 return (mconf->meshid_len == elems->mesh_id_len && 159 os_memcmp(mconf->meshid, elems->mesh_id, 160 elems->mesh_id_len) == 0 && 161 mconf->mesh_pp_id == elems->mesh_config[0] && 162 mconf->mesh_pm_id == elems->mesh_config[1] && 163 mconf->mesh_cc_id == elems->mesh_config[2] && 164 mconf->mesh_sp_id == elems->mesh_config[3] && 165 mconf->mesh_auth_id == elems->mesh_config[4]); 166 } 167 168 169 /* check if local link id is already used with another peer */ 170 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid) 171 { 172 struct sta_info *sta; 173 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 174 175 for (sta = hapd->sta_list; sta; sta = sta->next) { 176 if (sta->my_lid == llid) 177 return TRUE; 178 } 179 180 return FALSE; 181 } 182 183 184 /* generate an llid for a link and set to initial state */ 185 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s, 186 struct sta_info *sta) 187 { 188 u16 llid; 189 190 do { 191 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0) 192 llid = 0; /* continue */ 193 } while (!llid || llid_in_use(wpa_s, llid)); 194 195 sta->my_lid = llid; 196 sta->peer_lid = 0; 197 sta->peer_aid = 0; 198 199 /* 200 * We do not use wpa_mesh_set_plink_state() here because there is no 201 * entry in kernel yet. 202 */ 203 sta->plink_state = PLINK_IDLE; 204 } 205 206 207 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s, 208 struct sta_info *sta, 209 enum plink_action_field type, 210 u16 close_reason) 211 { 212 struct wpabuf *buf; 213 struct hostapd_iface *ifmsh = wpa_s->ifmsh; 214 struct hostapd_data *bss = ifmsh->bss[0]; 215 struct mesh_conf *conf = ifmsh->mconf; 216 u8 supp_rates[2 + 2 + 32]; 217 u8 *pos, *cat; 218 u8 ie_len, add_plid = 0; 219 int ret; 220 int ampe = conf->security & MESH_CONF_SEC_AMPE; 221 size_t buf_len; 222 223 if (!sta) 224 return; 225 226 buf_len = 2 + /* Category and Action */ 227 2 + /* capability info */ 228 2 + /* AID */ 229 2 + 8 + /* supported rates */ 230 2 + (32 - 8) + 231 2 + 32 + /* mesh ID */ 232 2 + 7 + /* mesh config */ 233 2 + 24 + /* peering management */ 234 2 + 96 + /* AMPE */ 235 2 + 16; /* MIC */ 236 #ifdef CONFIG_IEEE80211N 237 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 238 buf_len += 2 + 26 + /* HT capabilities */ 239 2 + 22; /* HT operation */ 240 } 241 #endif /* CONFIG_IEEE80211N */ 242 #ifdef CONFIG_IEEE80211AC 243 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 244 buf_len += 2 + 12 + /* VHT Capabilities */ 245 2 + 5; /* VHT Operation */ 246 } 247 #endif /* CONFIG_IEEE80211AC */ 248 if (type != PLINK_CLOSE) 249 buf_len += conf->rsn_ie_len; /* RSN IE */ 250 #ifdef CONFIG_OCV 251 /* OCI is included even when the other STA doesn't support OCV */ 252 if (type != PLINK_CLOSE && conf->ocv) 253 buf_len += OCV_OCI_EXTENDED_LEN; 254 #endif /* CONFIG_OCV */ 255 256 buf = wpabuf_alloc(buf_len); 257 if (!buf) 258 return; 259 260 cat = wpabuf_mhead_u8(buf); 261 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED); 262 wpabuf_put_u8(buf, type); 263 264 if (type != PLINK_CLOSE) { 265 u8 info; 266 267 /* capability info */ 268 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0); 269 270 /* aid */ 271 if (type == PLINK_CONFIRM) 272 wpabuf_put_le16(buf, sta->aid); 273 274 /* IE: supp + ext. supp rates */ 275 pos = hostapd_eid_supp_rates(bss, supp_rates); 276 pos = hostapd_eid_ext_supp_rates(bss, pos); 277 wpabuf_put_data(buf, supp_rates, pos - supp_rates); 278 279 /* IE: RSN IE */ 280 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len); 281 282 /* IE: Mesh ID */ 283 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 284 wpabuf_put_u8(buf, conf->meshid_len); 285 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 286 287 /* IE: mesh conf */ 288 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG); 289 wpabuf_put_u8(buf, 7); 290 wpabuf_put_u8(buf, conf->mesh_pp_id); 291 wpabuf_put_u8(buf, conf->mesh_pm_id); 292 wpabuf_put_u8(buf, conf->mesh_cc_id); 293 wpabuf_put_u8(buf, conf->mesh_sp_id); 294 wpabuf_put_u8(buf, conf->mesh_auth_id); 295 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1; 296 /* TODO: Add Connected to Mesh Gate/AS subfields */ 297 wpabuf_put_u8(buf, info); 298 /* always forwarding & accepting plinks for now */ 299 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER | 300 MESH_CAP_FORWARDING); 301 } else { /* Peer closing frame */ 302 /* IE: Mesh ID */ 303 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 304 wpabuf_put_u8(buf, conf->meshid_len); 305 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 306 } 307 308 /* IE: Mesh Peering Management element */ 309 ie_len = 4; 310 if (ampe) 311 ie_len += PMKID_LEN; 312 switch (type) { 313 case PLINK_OPEN: 314 break; 315 case PLINK_CONFIRM: 316 ie_len += 2; 317 add_plid = 1; 318 break; 319 case PLINK_CLOSE: 320 ie_len += 2; 321 add_plid = 1; 322 ie_len += 2; /* reason code */ 323 break; 324 } 325 326 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT); 327 wpabuf_put_u8(buf, ie_len); 328 /* peering protocol */ 329 if (ampe) 330 wpabuf_put_le16(buf, 1); 331 else 332 wpabuf_put_le16(buf, 0); 333 wpabuf_put_le16(buf, sta->my_lid); 334 if (add_plid) 335 wpabuf_put_le16(buf, sta->peer_lid); 336 if (type == PLINK_CLOSE) 337 wpabuf_put_le16(buf, close_reason); 338 if (ampe) { 339 if (sta->sae == NULL) { 340 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session"); 341 goto fail; 342 } 343 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta, 344 wpabuf_put(buf, PMKID_LEN)); 345 } 346 347 #ifdef CONFIG_IEEE80211N 348 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 349 u8 ht_capa_oper[2 + 26 + 2 + 22]; 350 351 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper); 352 pos = hostapd_eid_ht_operation(bss, pos); 353 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper); 354 } 355 #endif /* CONFIG_IEEE80211N */ 356 #ifdef CONFIG_IEEE80211AC 357 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 358 u8 vht_capa_oper[2 + 12 + 2 + 5]; 359 360 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0); 361 pos = hostapd_eid_vht_operation(bss, pos); 362 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper); 363 } 364 #endif /* CONFIG_IEEE80211AC */ 365 366 #ifdef CONFIG_OCV 367 if (type != PLINK_CLOSE && conf->ocv) { 368 struct wpa_channel_info ci; 369 370 if (wpa_drv_channel_info(wpa_s, &ci) != 0) { 371 wpa_printf(MSG_WARNING, 372 "Mesh MPM: Failed to get channel info for OCI element"); 373 goto fail; 374 } 375 376 pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN); 377 if (ocv_insert_extended_oci(&ci, pos) < 0) 378 goto fail; 379 } 380 #endif /* CONFIG_OCV */ 381 382 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) { 383 wpa_msg(wpa_s, MSG_INFO, 384 "Mesh MPM: failed to add AMPE and MIC IE"); 385 goto fail; 386 } 387 388 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to " 389 MACSTR " (my_lid=0x%x peer_lid=0x%x)", 390 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid); 391 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, 392 sta->addr, wpa_s->own_addr, wpa_s->own_addr, 393 wpabuf_head(buf), wpabuf_len(buf), 0); 394 if (ret < 0) 395 wpa_msg(wpa_s, MSG_INFO, 396 "Mesh MPM: failed to send peering frame"); 397 398 fail: 399 wpabuf_free(buf); 400 } 401 402 403 /* configure peering state in ours and driver's station entry */ 404 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, 405 struct sta_info *sta, 406 enum mesh_plink_state state) 407 { 408 struct hostapd_sta_add_params params; 409 int ret; 410 411 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s", 412 MAC2STR(sta->addr), mplstate[sta->plink_state], 413 mplstate[state]); 414 sta->plink_state = state; 415 416 os_memset(¶ms, 0, sizeof(params)); 417 params.addr = sta->addr; 418 params.plink_state = state; 419 params.peer_aid = sta->peer_aid; 420 params.set = 1; 421 422 ret = wpa_drv_sta_add(wpa_s, ¶ms); 423 if (ret) { 424 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR 425 ": %d", MAC2STR(sta->addr), ret); 426 } 427 } 428 429 430 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s, 431 struct sta_info *sta) 432 { 433 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 434 435 eloop_cancel_timeout(plink_timer, wpa_s, sta); 436 437 ap_free_sta(hapd, sta); 438 } 439 440 441 static void plink_timer(void *eloop_ctx, void *user_data) 442 { 443 struct wpa_supplicant *wpa_s = eloop_ctx; 444 struct sta_info *sta = user_data; 445 u16 reason = 0; 446 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 447 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 448 449 switch (sta->plink_state) { 450 case PLINK_OPN_RCVD: 451 case PLINK_OPN_SNT: 452 /* retry timer */ 453 if (sta->mpm_retries < conf->dot11MeshMaxRetries) { 454 eloop_register_timeout( 455 conf->dot11MeshRetryTimeout / 1000, 456 (conf->dot11MeshRetryTimeout % 1000) * 1000, 457 plink_timer, wpa_s, sta); 458 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 459 sta->mpm_retries++; 460 break; 461 } 462 reason = WLAN_REASON_MESH_MAX_RETRIES; 463 /* fall through */ 464 465 case PLINK_CNF_RCVD: 466 /* confirm timer */ 467 if (!reason) 468 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT; 469 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 470 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000, 471 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 472 plink_timer, wpa_s, sta); 473 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 474 break; 475 case PLINK_HOLDING: 476 /* holding timer */ 477 478 if (sta->mesh_sae_pmksa_caching) { 479 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR 480 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it", 481 MAC2STR(sta->addr)); 482 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 483 } 484 mesh_mpm_fsm_restart(wpa_s, sta); 485 break; 486 default: 487 break; 488 } 489 } 490 491 492 /* initiate peering with station */ 493 static void 494 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta, 495 enum mesh_plink_state next_state) 496 { 497 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 498 499 eloop_cancel_timeout(plink_timer, wpa_s, sta); 500 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000, 501 (conf->dot11MeshRetryTimeout % 1000) * 1000, 502 plink_timer, wpa_s, sta); 503 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 504 wpa_mesh_set_plink_state(wpa_s, sta, next_state); 505 } 506 507 508 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta, 509 void *ctx) 510 { 511 struct wpa_supplicant *wpa_s = ctx; 512 int reason = WLAN_REASON_MESH_PEERING_CANCELLED; 513 514 if (sta) { 515 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 516 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 517 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR, 518 MAC2STR(sta->addr)); 519 eloop_cancel_timeout(plink_timer, wpa_s, sta); 520 return 0; 521 } 522 523 return 1; 524 } 525 526 527 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 528 { 529 struct hostapd_data *hapd; 530 struct sta_info *sta; 531 532 if (!wpa_s->ifmsh) { 533 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 534 return -1; 535 } 536 537 hapd = wpa_s->ifmsh->bss[0]; 538 sta = ap_get_sta(hapd, addr); 539 if (!sta) { 540 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 541 return -1; 542 } 543 544 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1; 545 } 546 547 548 static void peer_add_timer(void *eloop_ctx, void *user_data) 549 { 550 struct wpa_supplicant *wpa_s = eloop_ctx; 551 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 552 553 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN); 554 } 555 556 557 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 558 int duration) 559 { 560 struct wpa_ssid *ssid = wpa_s->current_ssid; 561 struct hostapd_data *hapd; 562 struct sta_info *sta; 563 struct mesh_conf *conf; 564 565 if (!wpa_s->ifmsh) { 566 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 567 return -1; 568 } 569 570 if (!ssid || !ssid->no_auto_peer) { 571 wpa_msg(wpa_s, MSG_INFO, 572 "This command is available only with no_auto_peer mesh network"); 573 return -1; 574 } 575 576 hapd = wpa_s->ifmsh->bss[0]; 577 conf = wpa_s->ifmsh->mconf; 578 579 sta = ap_get_sta(hapd, addr); 580 if (!sta) { 581 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 582 return -1; 583 } 584 585 if ((PLINK_OPN_SNT <= sta->plink_state && 586 sta->plink_state <= PLINK_ESTAB) || 587 (sta->sae && sta->sae->state > SAE_NOTHING)) { 588 wpa_msg(wpa_s, MSG_INFO, 589 "Specified peer is connecting/connected"); 590 return -1; 591 } 592 593 if (conf->security == MESH_CONF_SEC_NONE) { 594 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 595 } else { 596 mesh_rsn_auth_sae_sta(wpa_s, sta); 597 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN); 598 eloop_register_timeout(duration == -1 ? 10 : duration, 0, 599 peer_add_timer, wpa_s, NULL); 600 } 601 602 return 0; 603 } 604 605 606 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh) 607 { 608 struct hostapd_data *hapd = ifmsh->bss[0]; 609 610 /* notify peers we're leaving */ 611 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s); 612 613 hapd->num_plinks = 0; 614 hostapd_free_stas(hapd); 615 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 616 } 617 618 619 /* for mesh_rsn to indicate this peer has completed authentication, and we're 620 * ready to start AMPE */ 621 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 622 { 623 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 624 struct hostapd_sta_add_params params; 625 struct sta_info *sta; 626 int ret; 627 628 sta = ap_get_sta(data, addr); 629 if (!sta) { 630 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer"); 631 return; 632 } 633 634 /* TODO: Should do nothing if this STA is already authenticated, but 635 * the AP code already sets this flag. */ 636 sta->flags |= WLAN_STA_AUTH; 637 638 mesh_rsn_init_ampe_sta(wpa_s, sta); 639 640 os_memset(¶ms, 0, sizeof(params)); 641 params.addr = sta->addr; 642 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED; 643 params.set = 1; 644 645 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR, 646 MAC2STR(sta->addr)); 647 ret = wpa_drv_sta_add(wpa_s, ¶ms); 648 if (ret) { 649 wpa_msg(wpa_s, MSG_ERROR, 650 "Driver failed to set " MACSTR ": %d", 651 MAC2STR(sta->addr), ret); 652 } 653 654 if (!sta->my_lid) 655 mesh_mpm_init_link(wpa_s, sta); 656 657 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 658 } 659 660 /* 661 * Initialize a sta_info structure for a peer and upload it into the driver 662 * in preparation for beginning authentication or peering. This is done when a 663 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is 664 * received from the peer for the first time. 665 */ 666 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s, 667 const u8 *addr, 668 struct ieee802_11_elems *elems) 669 { 670 struct hostapd_sta_add_params params; 671 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 672 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 673 struct sta_info *sta; 674 #ifdef CONFIG_IEEE80211N 675 struct ieee80211_ht_operation *oper; 676 #endif /* CONFIG_IEEE80211N */ 677 int ret; 678 679 if (elems->mesh_config_len >= 7 && 680 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) { 681 wpa_msg(wpa_s, MSG_DEBUG, 682 "mesh: Ignore a crowded peer " MACSTR, 683 MAC2STR(addr)); 684 return NULL; 685 } 686 687 sta = ap_get_sta(data, addr); 688 if (!sta) { 689 sta = ap_sta_add(data, addr); 690 if (!sta) 691 return NULL; 692 } 693 694 /* Set WMM by default since Mesh STAs are QoS STAs */ 695 sta->flags |= WLAN_STA_WMM; 696 697 /* initialize sta */ 698 if (copy_supp_rates(wpa_s, sta, elems)) { 699 ap_free_sta(data, sta); 700 return NULL; 701 } 702 703 if (!sta->my_lid) 704 mesh_mpm_init_link(wpa_s, sta); 705 706 #ifdef CONFIG_IEEE80211N 707 copy_sta_ht_capab(data, sta, elems->ht_capabilities); 708 709 oper = (struct ieee80211_ht_operation *) elems->ht_operation; 710 if (oper && 711 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) && 712 sta->ht_capabilities) { 713 wpa_msg(wpa_s, MSG_DEBUG, MACSTR 714 " does not support 40 MHz bandwidth", 715 MAC2STR(sta->addr)); 716 set_disable_ht40(sta->ht_capabilities, 1); 717 } 718 719 update_ht_state(data, sta); 720 #endif /* CONFIG_IEEE80211N */ 721 722 #ifdef CONFIG_IEEE80211AC 723 copy_sta_vht_capab(data, sta, elems->vht_capabilities); 724 copy_sta_vht_oper(data, sta, elems->vht_operation); 725 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif); 726 #endif /* CONFIG_IEEE80211AC */ 727 728 if (hostapd_get_aid(data, sta) < 0) { 729 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available"); 730 ap_free_sta(data, sta); 731 return NULL; 732 } 733 734 /* insert into driver */ 735 os_memset(¶ms, 0, sizeof(params)); 736 params.supp_rates = sta->supported_rates; 737 params.supp_rates_len = sta->supported_rates_len; 738 params.addr = addr; 739 params.plink_state = sta->plink_state; 740 params.aid = sta->aid; 741 params.peer_aid = sta->peer_aid; 742 params.listen_interval = 100; 743 params.ht_capabilities = sta->ht_capabilities; 744 params.vht_capabilities = sta->vht_capabilities; 745 params.flags |= WPA_STA_WMM; 746 params.flags_mask |= WPA_STA_AUTHENTICATED; 747 if (conf->security == MESH_CONF_SEC_NONE) { 748 params.flags |= WPA_STA_AUTHORIZED; 749 params.flags |= WPA_STA_AUTHENTICATED; 750 } else { 751 sta->flags |= WLAN_STA_MFP; 752 params.flags |= WPA_STA_MFP; 753 } 754 755 ret = wpa_drv_sta_add(wpa_s, ¶ms); 756 if (ret) { 757 wpa_msg(wpa_s, MSG_ERROR, 758 "Driver failed to insert " MACSTR ": %d", 759 MAC2STR(addr), ret); 760 ap_free_sta(data, sta); 761 return NULL; 762 } 763 764 return sta; 765 } 766 767 768 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 769 struct ieee802_11_elems *elems) 770 { 771 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 772 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 773 struct sta_info *sta; 774 struct wpa_ssid *ssid = wpa_s->current_ssid; 775 776 sta = mesh_mpm_add_peer(wpa_s, addr, elems); 777 if (!sta) 778 return; 779 780 if (ssid && ssid->no_auto_peer && 781 (is_zero_ether_addr(data->mesh_required_peer) || 782 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) { 783 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with " 784 MACSTR " because of no_auto_peer", MAC2STR(addr)); 785 if (data->mesh_pending_auth) { 786 struct os_reltime age; 787 const struct ieee80211_mgmt *mgmt; 788 struct hostapd_frame_info fi; 789 790 mgmt = wpabuf_head(data->mesh_pending_auth); 791 os_reltime_age(&data->mesh_pending_auth_time, &age); 792 if (age.sec < 2 && 793 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) { 794 wpa_printf(MSG_DEBUG, 795 "mesh: Process pending Authentication frame from %u.%06u seconds ago", 796 (unsigned int) age.sec, 797 (unsigned int) age.usec); 798 os_memset(&fi, 0, sizeof(fi)); 799 ieee802_11_mgmt( 800 data, 801 wpabuf_head(data->mesh_pending_auth), 802 wpabuf_len(data->mesh_pending_auth), 803 &fi); 804 } 805 wpabuf_free(data->mesh_pending_auth); 806 data->mesh_pending_auth = NULL; 807 } 808 return; 809 } 810 811 if (conf->security == MESH_CONF_SEC_NONE) { 812 if (sta->plink_state < PLINK_OPN_SNT || 813 sta->plink_state > PLINK_ESTAB) 814 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 815 } else { 816 mesh_rsn_auth_sae_sta(wpa_s, sta); 817 } 818 } 819 820 821 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt) 822 { 823 struct hostapd_frame_info fi; 824 825 os_memset(&fi, 0, sizeof(fi)); 826 fi.datarate = rx_mgmt->datarate; 827 fi.ssi_signal = rx_mgmt->ssi_signal; 828 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame, 829 rx_mgmt->frame_len, &fi); 830 } 831 832 833 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s, 834 struct sta_info *sta) 835 { 836 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 837 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 838 u8 seq[6] = {}; 839 840 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established", 841 MAC2STR(sta->addr)); 842 843 if (conf->security & MESH_CONF_SEC_AMPE) { 844 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len); 845 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher), 846 sta->addr, 0, 0, seq, sizeof(seq), 847 sta->mtk, sta->mtk_len); 848 849 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC", 850 sta->mgtk_rsc, sizeof(sta->mgtk_rsc)); 851 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK", 852 sta->mgtk, sta->mgtk_len); 853 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher), 854 sta->addr, sta->mgtk_key_id, 0, 855 sta->mgtk_rsc, sizeof(sta->mgtk_rsc), 856 sta->mgtk, sta->mgtk_len); 857 858 if (sta->igtk_len) { 859 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC", 860 sta->igtk_rsc, sizeof(sta->igtk_rsc)); 861 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK", 862 sta->igtk, sta->igtk_len); 863 wpa_drv_set_key( 864 wpa_s, 865 wpa_cipher_to_alg(conf->mgmt_group_cipher), 866 sta->addr, sta->igtk_key_id, 0, 867 sta->igtk_rsc, sizeof(sta->igtk_rsc), 868 sta->igtk, sta->igtk_len); 869 } 870 } 871 872 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB); 873 hapd->num_plinks++; 874 875 sta->flags |= WLAN_STA_ASSOC; 876 sta->mesh_sae_pmksa_caching = 0; 877 878 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 879 peer_add_timer(wpa_s, NULL); 880 eloop_cancel_timeout(plink_timer, wpa_s, sta); 881 882 /* Send ctrl event */ 883 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR, 884 MAC2STR(sta->addr)); 885 886 /* Send D-Bus event */ 887 wpas_notify_mesh_peer_connected(wpa_s, sta->addr); 888 } 889 890 891 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta, 892 enum plink_event event, u16 reason) 893 { 894 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 895 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 896 897 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s", 898 MAC2STR(sta->addr), mplstate[sta->plink_state], 899 mplevent[event]); 900 901 switch (sta->plink_state) { 902 case PLINK_IDLE: 903 switch (event) { 904 case CLS_ACPT: 905 mesh_mpm_fsm_restart(wpa_s, sta); 906 break; 907 case OPN_ACPT: 908 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD); 909 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 910 0); 911 break; 912 case REQ_RJCT: 913 mesh_mpm_send_plink_action(wpa_s, sta, 914 PLINK_CLOSE, reason); 915 break; 916 default: 917 break; 918 } 919 break; 920 case PLINK_OPN_SNT: 921 switch (event) { 922 case OPN_RJCT: 923 case CNF_RJCT: 924 if (!reason) 925 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 926 /* fall-through */ 927 case CLS_ACPT: 928 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 929 if (!reason) 930 reason = WLAN_REASON_MESH_CLOSE_RCVD; 931 eloop_register_timeout( 932 conf->dot11MeshHoldingTimeout / 1000, 933 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 934 plink_timer, wpa_s, sta); 935 mesh_mpm_send_plink_action(wpa_s, sta, 936 PLINK_CLOSE, reason); 937 break; 938 case OPN_ACPT: 939 /* retry timer is left untouched */ 940 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD); 941 mesh_mpm_send_plink_action(wpa_s, sta, 942 PLINK_CONFIRM, 0); 943 break; 944 case CNF_ACPT: 945 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD); 946 eloop_cancel_timeout(plink_timer, wpa_s, sta); 947 eloop_register_timeout( 948 conf->dot11MeshConfirmTimeout / 1000, 949 (conf->dot11MeshConfirmTimeout % 1000) * 1000, 950 plink_timer, wpa_s, sta); 951 break; 952 default: 953 break; 954 } 955 break; 956 case PLINK_OPN_RCVD: 957 switch (event) { 958 case OPN_RJCT: 959 case CNF_RJCT: 960 if (!reason) 961 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 962 /* fall-through */ 963 case CLS_ACPT: 964 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 965 if (!reason) 966 reason = WLAN_REASON_MESH_CLOSE_RCVD; 967 eloop_register_timeout( 968 conf->dot11MeshHoldingTimeout / 1000, 969 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 970 plink_timer, wpa_s, sta); 971 sta->mpm_close_reason = reason; 972 mesh_mpm_send_plink_action(wpa_s, sta, 973 PLINK_CLOSE, reason); 974 break; 975 case OPN_ACPT: 976 mesh_mpm_send_plink_action(wpa_s, sta, 977 PLINK_CONFIRM, 0); 978 break; 979 case CNF_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 break; 984 default: 985 break; 986 } 987 break; 988 case PLINK_CNF_RCVD: 989 switch (event) { 990 case OPN_RJCT: 991 case CNF_RJCT: 992 if (!reason) 993 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 994 /* fall-through */ 995 case CLS_ACPT: 996 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 997 if (!reason) 998 reason = WLAN_REASON_MESH_CLOSE_RCVD; 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 mesh_mpm_send_plink_action(wpa_s, sta, 1005 PLINK_CLOSE, reason); 1006 break; 1007 case OPN_ACPT: 1008 if (conf->security & MESH_CONF_SEC_AMPE) 1009 mesh_rsn_derive_mtk(wpa_s, sta); 1010 mesh_mpm_plink_estab(wpa_s, sta); 1011 mesh_mpm_send_plink_action(wpa_s, sta, 1012 PLINK_CONFIRM, 0); 1013 break; 1014 default: 1015 break; 1016 } 1017 break; 1018 case PLINK_ESTAB: 1019 switch (event) { 1020 case OPN_RJCT: 1021 case CNF_RJCT: 1022 case CLS_ACPT: 1023 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 1024 if (!reason) 1025 reason = WLAN_REASON_MESH_CLOSE_RCVD; 1026 1027 eloop_register_timeout( 1028 conf->dot11MeshHoldingTimeout / 1000, 1029 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1030 plink_timer, wpa_s, sta); 1031 sta->mpm_close_reason = reason; 1032 1033 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR 1034 " closed with reason %d", 1035 MAC2STR(sta->addr), reason); 1036 1037 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR, 1038 MAC2STR(sta->addr)); 1039 1040 /* Send D-Bus event */ 1041 wpas_notify_mesh_peer_disconnected(wpa_s, sta->addr, 1042 reason); 1043 1044 hapd->num_plinks--; 1045 1046 mesh_mpm_send_plink_action(wpa_s, sta, 1047 PLINK_CLOSE, reason); 1048 break; 1049 case OPN_ACPT: 1050 mesh_mpm_send_plink_action(wpa_s, sta, 1051 PLINK_CONFIRM, 0); 1052 break; 1053 default: 1054 break; 1055 } 1056 break; 1057 case PLINK_HOLDING: 1058 switch (event) { 1059 case CLS_ACPT: 1060 mesh_mpm_fsm_restart(wpa_s, sta); 1061 break; 1062 case OPN_ACPT: 1063 case CNF_ACPT: 1064 case OPN_RJCT: 1065 case CNF_RJCT: 1066 reason = sta->mpm_close_reason; 1067 mesh_mpm_send_plink_action(wpa_s, sta, 1068 PLINK_CLOSE, reason); 1069 break; 1070 default: 1071 break; 1072 } 1073 break; 1074 default: 1075 wpa_msg(wpa_s, MSG_DEBUG, 1076 "Unsupported MPM event %s for state %s", 1077 mplevent[event], mplstate[sta->plink_state]); 1078 break; 1079 } 1080 } 1081 1082 1083 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s, 1084 const struct ieee80211_mgmt *mgmt, size_t len) 1085 { 1086 u8 action_field; 1087 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 1088 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 1089 struct sta_info *sta; 1090 u16 plid = 0, llid = 0, aid = 0; 1091 enum plink_event event; 1092 struct ieee802_11_elems elems; 1093 struct mesh_peer_mgmt_ie peer_mgmt_ie; 1094 const u8 *ies; 1095 size_t ie_len; 1096 int ret; 1097 u16 reason = 0; 1098 1099 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED) 1100 return; 1101 1102 action_field = mgmt->u.action.u.slf_prot_action.action; 1103 if (action_field != PLINK_OPEN && 1104 action_field != PLINK_CONFIRM && 1105 action_field != PLINK_CLOSE) 1106 return; 1107 1108 ies = mgmt->u.action.u.slf_prot_action.variable; 1109 ie_len = (const u8 *) mgmt + len - 1110 mgmt->u.action.u.slf_prot_action.variable; 1111 1112 /* at least expect mesh id and peering mgmt */ 1113 if (ie_len < 2 + 2) { 1114 wpa_printf(MSG_DEBUG, 1115 "MPM: Ignore too short action frame %u ie_len %u", 1116 action_field, (unsigned int) ie_len); 1117 return; 1118 } 1119 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field); 1120 1121 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) { 1122 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x", 1123 WPA_GET_LE16(ies)); 1124 ies += 2; /* capability */ 1125 ie_len -= 2; 1126 } 1127 if (action_field == PLINK_CONFIRM) { 1128 aid = WPA_GET_LE16(ies); 1129 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid); 1130 ies += 2; /* aid */ 1131 ie_len -= 2; 1132 } 1133 1134 /* check for mesh peering, mesh id and mesh config IEs */ 1135 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) { 1136 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs"); 1137 return; 1138 } 1139 if (!elems.peer_mgmt) { 1140 wpa_printf(MSG_DEBUG, 1141 "MPM: No Mesh Peering Management element"); 1142 return; 1143 } 1144 if (action_field != PLINK_CLOSE) { 1145 if (!elems.mesh_id || !elems.mesh_config) { 1146 wpa_printf(MSG_DEBUG, 1147 "MPM: No Mesh ID or Mesh Configuration element"); 1148 return; 1149 } 1150 1151 if (!matches_local(wpa_s, &elems)) { 1152 wpa_printf(MSG_DEBUG, 1153 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS"); 1154 return; 1155 } 1156 } 1157 1158 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field, 1159 elems.peer_mgmt, 1160 elems.peer_mgmt_len, 1161 &peer_mgmt_ie); 1162 if (ret) { 1163 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame"); 1164 return; 1165 } 1166 1167 /* the sender's llid is our plid and vice-versa */ 1168 plid = WPA_GET_LE16(peer_mgmt_ie.llid); 1169 if (peer_mgmt_ie.plid) 1170 llid = WPA_GET_LE16(peer_mgmt_ie.plid); 1171 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid); 1172 1173 if (action_field == PLINK_CLOSE) 1174 wpa_printf(MSG_DEBUG, "MPM: close reason=%u", 1175 WPA_GET_LE16(peer_mgmt_ie.reason)); 1176 1177 sta = ap_get_sta(hapd, mgmt->sa); 1178 1179 /* 1180 * If this is an open frame from an unknown STA, and this is an 1181 * open mesh, then go ahead and add the peer before proceeding. 1182 */ 1183 if (!sta && action_field == PLINK_OPEN && 1184 (!(mconf->security & MESH_CONF_SEC_AMPE) || 1185 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL))) 1186 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems); 1187 1188 if (!sta) { 1189 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer"); 1190 return; 1191 } 1192 1193 #ifdef CONFIG_SAE 1194 /* peer is in sae_accepted? */ 1195 if (sta->sae && sta->sae->state != SAE_ACCEPTED) { 1196 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer"); 1197 return; 1198 } 1199 #endif /* CONFIG_SAE */ 1200 1201 if (!sta->my_lid) 1202 mesh_mpm_init_link(wpa_s, sta); 1203 1204 if (mconf->security & MESH_CONF_SEC_AMPE) { 1205 int res; 1206 1207 res = mesh_rsn_process_ampe(wpa_s, sta, &elems, 1208 &mgmt->u.action.category, 1209 peer_mgmt_ie.chosen_pmk, 1210 ies, ie_len); 1211 if (res) { 1212 wpa_printf(MSG_DEBUG, 1213 "MPM: RSN process rejected frame (res=%d)", 1214 res); 1215 if (action_field == PLINK_OPEN && res == -2) { 1216 /* AES-SIV decryption failed */ 1217 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT, 1218 WLAN_REASON_MESH_INVALID_GTK); 1219 } 1220 return; 1221 } 1222 1223 #ifdef CONFIG_OCV 1224 if (action_field == PLINK_OPEN && elems.rsn_ie) { 1225 struct wpa_state_machine *sm = sta->wpa_sm; 1226 struct wpa_ie_data data; 1227 1228 res = wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 1229 elems.rsn_ie_len + 2, 1230 &data); 1231 if (res) { 1232 wpa_printf(MSG_DEBUG, 1233 "Failed to parse RSN IE (res=%d)", 1234 res); 1235 wpa_hexdump(MSG_DEBUG, "RSN IE", elems.rsn_ie, 1236 elems.rsn_ie_len); 1237 return; 1238 } 1239 1240 wpa_auth_set_ocv(sm, mconf->ocv && 1241 (data.capabilities & 1242 WPA_CAPABILITY_OCVC)); 1243 } 1244 1245 if (action_field != PLINK_CLOSE && 1246 wpa_auth_uses_ocv(sta->wpa_sm)) { 1247 struct wpa_channel_info ci; 1248 int tx_chanwidth; 1249 int tx_seg1_idx; 1250 1251 if (wpa_drv_channel_info(wpa_s, &ci) != 0) { 1252 wpa_printf(MSG_WARNING, 1253 "MPM: Failed to get channel info to validate received OCI in MPM Confirm"); 1254 return; 1255 } 1256 1257 if (get_tx_parameters( 1258 sta, channel_width_to_int(ci.chanwidth), 1259 ci.seg1_idx, &tx_chanwidth, 1260 &tx_seg1_idx) < 0) 1261 return; 1262 1263 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, 1264 tx_chanwidth, tx_seg1_idx) != 1265 0) { 1266 wpa_printf(MSG_WARNING, "MPM: %s", 1267 ocv_errorstr); 1268 return; 1269 } 1270 } 1271 #endif /* CONFIG_OCV */ 1272 } 1273 1274 if (sta->plink_state == PLINK_BLOCKED) { 1275 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED"); 1276 return; 1277 } 1278 1279 /* Now we will figure out the appropriate event... */ 1280 switch (action_field) { 1281 case PLINK_OPEN: 1282 if (plink_free_count(hapd) == 0) { 1283 event = REQ_RJCT; 1284 reason = WLAN_REASON_MESH_MAX_PEERS; 1285 wpa_printf(MSG_INFO, 1286 "MPM: Peer link num over quota(%d)", 1287 hapd->max_plinks); 1288 } else if (sta->peer_lid && sta->peer_lid != plid) { 1289 wpa_printf(MSG_DEBUG, 1290 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1291 sta->peer_lid, plid); 1292 return; /* no FSM event */ 1293 } else { 1294 sta->peer_lid = plid; 1295 event = OPN_ACPT; 1296 } 1297 break; 1298 case PLINK_CONFIRM: 1299 if (plink_free_count(hapd) == 0) { 1300 event = REQ_RJCT; 1301 reason = WLAN_REASON_MESH_MAX_PEERS; 1302 wpa_printf(MSG_INFO, 1303 "MPM: Peer link num over quota(%d)", 1304 hapd->max_plinks); 1305 } else if (sta->my_lid != llid || 1306 (sta->peer_lid && sta->peer_lid != plid)) { 1307 wpa_printf(MSG_DEBUG, 1308 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x", 1309 sta->my_lid, llid, sta->peer_lid, plid); 1310 return; /* no FSM event */ 1311 } else { 1312 if (!sta->peer_lid) 1313 sta->peer_lid = plid; 1314 sta->peer_aid = aid; 1315 event = CNF_ACPT; 1316 } 1317 break; 1318 case PLINK_CLOSE: 1319 if (sta->plink_state == PLINK_ESTAB) 1320 /* Do not check for llid or plid. This does not 1321 * follow the standard but since multiple plinks 1322 * per cand are not supported, it is necessary in 1323 * order to avoid a livelock when MP A sees an 1324 * establish peer link to MP B but MP B does not 1325 * see it. This can be caused by a timeout in 1326 * B's peer link establishment or B being 1327 * restarted. 1328 */ 1329 event = CLS_ACPT; 1330 else if (sta->peer_lid != plid) { 1331 wpa_printf(MSG_DEBUG, 1332 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1333 sta->peer_lid, plid); 1334 return; /* no FSM event */ 1335 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) { 1336 wpa_printf(MSG_DEBUG, 1337 "MPM: my_lid mismatch: 0x%x != 0x%x", 1338 sta->my_lid, llid); 1339 return; /* no FSM event */ 1340 } else { 1341 event = CLS_ACPT; 1342 } 1343 break; 1344 default: 1345 /* 1346 * This cannot be hit due to the action_field check above, but 1347 * compilers may not be able to figure that out and can warn 1348 * about uninitialized event below. 1349 */ 1350 return; 1351 } 1352 mesh_mpm_fsm(wpa_s, sta, event, reason); 1353 } 1354 1355 1356 /* called by ap_free_sta */ 1357 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta) 1358 { 1359 if (sta->plink_state == PLINK_ESTAB) 1360 hapd->num_plinks--; 1361 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta); 1362 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta); 1363 } 1364
