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 bool 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 bool 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 + 32 + 32 + /* AMPE (96 + max GTKlen + max IGTKlen) */ 235 2 + 16; /* MIC */ 236 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 237 buf_len += 2 + 26 + /* HT capabilities */ 238 2 + 22; /* HT operation */ 239 } 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 #ifdef CONFIG_IEEE80211AX 247 if (type != PLINK_CLOSE && wpa_s->mesh_he_enabled) { 248 buf_len += 3 + 249 HE_MAX_MAC_CAPAB_SIZE + 250 HE_MAX_PHY_CAPAB_SIZE + 251 HE_MAX_MCS_CAPAB_SIZE + 252 HE_MAX_PPET_CAPAB_SIZE; 253 buf_len += 3 + sizeof(struct ieee80211_he_operation); 254 if (is_6ghz_op_class(bss->iconf->op_class)) 255 buf_len += sizeof(struct ieee80211_he_6ghz_oper_info) + 256 3 + sizeof(struct ieee80211_he_6ghz_band_cap); 257 } 258 #endif /* CONFIG_IEEE80211AX */ 259 if (type != PLINK_CLOSE) 260 buf_len += conf->rsn_ie_len; /* RSN IE */ 261 #ifdef CONFIG_OCV 262 /* OCI is included even when the other STA doesn't support OCV */ 263 if (type != PLINK_CLOSE && conf->ocv) 264 buf_len += OCV_OCI_EXTENDED_LEN; 265 #endif /* CONFIG_OCV */ 266 267 buf = wpabuf_alloc(buf_len); 268 if (!buf) 269 return; 270 271 cat = wpabuf_mhead_u8(buf); 272 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED); 273 wpabuf_put_u8(buf, type); 274 275 if (type != PLINK_CLOSE) { 276 u8 info; 277 278 /* capability info */ 279 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0); 280 281 /* aid */ 282 if (type == PLINK_CONFIRM) 283 wpabuf_put_le16(buf, sta->aid); 284 285 /* IE: supp + ext. supp rates */ 286 pos = hostapd_eid_supp_rates(bss, supp_rates); 287 pos = hostapd_eid_ext_supp_rates(bss, pos); 288 wpabuf_put_data(buf, supp_rates, pos - supp_rates); 289 290 /* IE: RSN IE */ 291 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len); 292 293 /* IE: Mesh ID */ 294 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 295 wpabuf_put_u8(buf, conf->meshid_len); 296 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 297 298 /* IE: mesh conf */ 299 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG); 300 wpabuf_put_u8(buf, 7); 301 wpabuf_put_u8(buf, conf->mesh_pp_id); 302 wpabuf_put_u8(buf, conf->mesh_pm_id); 303 wpabuf_put_u8(buf, conf->mesh_cc_id); 304 wpabuf_put_u8(buf, conf->mesh_sp_id); 305 wpabuf_put_u8(buf, conf->mesh_auth_id); 306 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1; 307 /* TODO: Add Connected to Mesh Gate/AS subfields */ 308 wpabuf_put_u8(buf, info); 309 /* always forwarding & accepting plinks for now */ 310 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER | 311 MESH_CAP_FORWARDING); 312 } else { /* Peer closing frame */ 313 /* IE: Mesh ID */ 314 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 315 wpabuf_put_u8(buf, conf->meshid_len); 316 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 317 } 318 319 /* IE: Mesh Peering Management element */ 320 ie_len = 4; 321 if (ampe) 322 ie_len += PMKID_LEN; 323 switch (type) { 324 case PLINK_OPEN: 325 break; 326 case PLINK_CONFIRM: 327 ie_len += 2; 328 add_plid = 1; 329 break; 330 case PLINK_CLOSE: 331 ie_len += 2; 332 add_plid = 1; 333 ie_len += 2; /* reason code */ 334 break; 335 } 336 337 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT); 338 wpabuf_put_u8(buf, ie_len); 339 /* peering protocol */ 340 if (ampe) 341 wpabuf_put_le16(buf, 1); 342 else 343 wpabuf_put_le16(buf, 0); 344 wpabuf_put_le16(buf, sta->my_lid); 345 if (add_plid) 346 wpabuf_put_le16(buf, sta->peer_lid); 347 if (type == PLINK_CLOSE) 348 wpabuf_put_le16(buf, close_reason); 349 if (ampe) { 350 if (sta->sae == NULL) { 351 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session"); 352 goto fail; 353 } 354 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta, 355 wpabuf_put(buf, PMKID_LEN)); 356 } 357 358 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 359 u8 ht_capa_oper[2 + 26 + 2 + 22]; 360 361 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper); 362 pos = hostapd_eid_ht_operation(bss, pos); 363 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper); 364 } 365 #ifdef CONFIG_IEEE80211AC 366 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 367 u8 vht_capa_oper[2 + 12 + 2 + 5]; 368 369 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0); 370 pos = hostapd_eid_vht_operation(bss, pos); 371 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper); 372 } 373 #endif /* CONFIG_IEEE80211AC */ 374 #ifdef CONFIG_IEEE80211AX 375 if (type != PLINK_CLOSE && wpa_s->mesh_he_enabled) { 376 u8 he_capa_oper[3 + 377 HE_MAX_MAC_CAPAB_SIZE + 378 HE_MAX_PHY_CAPAB_SIZE + 379 HE_MAX_MCS_CAPAB_SIZE + 380 HE_MAX_PPET_CAPAB_SIZE + 381 3 + sizeof(struct ieee80211_he_operation) + 382 sizeof(struct ieee80211_he_6ghz_oper_info) + 383 3 + sizeof(struct ieee80211_he_6ghz_band_cap)]; 384 385 pos = hostapd_eid_he_capab(bss, he_capa_oper, 386 IEEE80211_MODE_MESH); 387 pos = hostapd_eid_he_operation(bss, pos); 388 pos = hostapd_eid_he_6ghz_band_cap(bss, pos); 389 wpabuf_put_data(buf, he_capa_oper, pos - he_capa_oper); 390 } 391 #endif /* CONFIG_IEEE80211AX */ 392 393 #ifdef CONFIG_OCV 394 if (type != PLINK_CLOSE && conf->ocv) { 395 struct wpa_channel_info ci; 396 397 if (wpa_drv_channel_info(wpa_s, &ci) != 0) { 398 wpa_printf(MSG_WARNING, 399 "Mesh MPM: Failed to get channel info for OCI element"); 400 goto fail; 401 } 402 403 pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN); 404 if (ocv_insert_extended_oci(&ci, pos) < 0) 405 goto fail; 406 } 407 #endif /* CONFIG_OCV */ 408 409 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) { 410 wpa_msg(wpa_s, MSG_INFO, 411 "Mesh MPM: failed to add AMPE and MIC IE"); 412 goto fail; 413 } 414 415 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to " 416 MACSTR " (my_lid=0x%x peer_lid=0x%x)", 417 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid); 418 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, 419 sta->addr, wpa_s->own_addr, wpa_s->own_addr, 420 wpabuf_head(buf), wpabuf_len(buf), 0); 421 if (ret < 0) 422 wpa_msg(wpa_s, MSG_INFO, 423 "Mesh MPM: failed to send peering frame"); 424 425 fail: 426 wpabuf_free(buf); 427 } 428 429 430 /* configure peering state in ours and driver's station entry */ 431 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, 432 struct sta_info *sta, 433 enum mesh_plink_state state) 434 { 435 struct hostapd_sta_add_params params; 436 int ret; 437 438 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s", 439 MAC2STR(sta->addr), mplstate[sta->plink_state], 440 mplstate[state]); 441 sta->plink_state = state; 442 443 os_memset(¶ms, 0, sizeof(params)); 444 params.addr = sta->addr; 445 params.plink_state = state; 446 params.peer_aid = sta->peer_aid; 447 params.set = 1; 448 449 ret = wpa_drv_sta_add(wpa_s, ¶ms); 450 if (ret) { 451 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR 452 ": %d", MAC2STR(sta->addr), ret); 453 } 454 } 455 456 457 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s, 458 struct sta_info *sta) 459 { 460 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 461 462 eloop_cancel_timeout(plink_timer, wpa_s, sta); 463 464 ap_free_sta(hapd, sta); 465 } 466 467 468 static void plink_timer(void *eloop_ctx, void *user_data) 469 { 470 struct wpa_supplicant *wpa_s = eloop_ctx; 471 struct sta_info *sta = user_data; 472 u16 reason = 0; 473 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 474 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 475 476 switch (sta->plink_state) { 477 case PLINK_OPN_RCVD: 478 case PLINK_OPN_SNT: 479 /* retry timer */ 480 if (sta->mpm_retries < conf->dot11MeshMaxRetries) { 481 eloop_register_timeout( 482 conf->dot11MeshRetryTimeout / 1000, 483 (conf->dot11MeshRetryTimeout % 1000) * 1000, 484 plink_timer, wpa_s, sta); 485 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 486 sta->mpm_retries++; 487 break; 488 } 489 reason = WLAN_REASON_MESH_MAX_RETRIES; 490 /* fall through */ 491 492 case PLINK_CNF_RCVD: 493 /* confirm timer */ 494 if (!reason) 495 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT; 496 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 497 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000, 498 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 499 plink_timer, wpa_s, sta); 500 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 501 break; 502 case PLINK_HOLDING: 503 /* holding timer */ 504 505 if (sta->mesh_sae_pmksa_caching) { 506 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR 507 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it", 508 MAC2STR(sta->addr)); 509 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 510 } 511 mesh_mpm_fsm_restart(wpa_s, sta); 512 break; 513 default: 514 break; 515 } 516 } 517 518 519 /* initiate peering with station */ 520 static void 521 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta, 522 enum mesh_plink_state next_state) 523 { 524 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 525 526 eloop_cancel_timeout(plink_timer, wpa_s, sta); 527 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000, 528 (conf->dot11MeshRetryTimeout % 1000) * 1000, 529 plink_timer, wpa_s, sta); 530 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 531 wpa_mesh_set_plink_state(wpa_s, sta, next_state); 532 } 533 534 535 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta, 536 void *ctx) 537 { 538 struct wpa_supplicant *wpa_s = ctx; 539 int reason = WLAN_REASON_MESH_PEERING_CANCELLED; 540 541 if (sta) { 542 if (sta->plink_state == PLINK_ESTAB) 543 hapd->num_plinks--; 544 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 545 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 546 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR, 547 MAC2STR(sta->addr)); 548 eloop_cancel_timeout(plink_timer, wpa_s, sta); 549 eloop_cancel_timeout(mesh_auth_timer, wpa_s, sta); 550 return 0; 551 } 552 553 return 1; 554 } 555 556 557 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 558 { 559 struct hostapd_data *hapd; 560 struct sta_info *sta; 561 562 if (!wpa_s->ifmsh) { 563 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 564 return -1; 565 } 566 567 hapd = wpa_s->ifmsh->bss[0]; 568 sta = ap_get_sta(hapd, addr); 569 if (!sta) { 570 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 571 return -1; 572 } 573 574 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1; 575 } 576 577 578 static void peer_add_timer(void *eloop_ctx, void *user_data) 579 { 580 struct wpa_supplicant *wpa_s = eloop_ctx; 581 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 582 583 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN); 584 } 585 586 587 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 588 int duration) 589 { 590 struct wpa_ssid *ssid = wpa_s->current_ssid; 591 struct hostapd_data *hapd; 592 struct sta_info *sta; 593 struct mesh_conf *conf; 594 595 if (!wpa_s->ifmsh) { 596 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 597 return -1; 598 } 599 600 if (!ssid || !ssid->no_auto_peer) { 601 wpa_msg(wpa_s, MSG_INFO, 602 "This command is available only with no_auto_peer mesh network"); 603 return -1; 604 } 605 606 hapd = wpa_s->ifmsh->bss[0]; 607 conf = wpa_s->ifmsh->mconf; 608 609 sta = ap_get_sta(hapd, addr); 610 if (!sta) { 611 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 612 return -1; 613 } 614 615 if ((PLINK_OPN_SNT <= sta->plink_state && 616 sta->plink_state <= PLINK_ESTAB) || 617 (sta->sae && sta->sae->state > SAE_NOTHING)) { 618 wpa_msg(wpa_s, MSG_INFO, 619 "Specified peer is connecting/connected"); 620 return -1; 621 } 622 623 if (conf->security == MESH_CONF_SEC_NONE) { 624 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 625 } else { 626 mesh_rsn_auth_sae_sta(wpa_s, sta); 627 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN); 628 eloop_register_timeout(duration == -1 ? 10 : duration, 0, 629 peer_add_timer, wpa_s, NULL); 630 } 631 632 return 0; 633 } 634 635 636 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh) 637 { 638 struct hostapd_data *hapd = ifmsh->bss[0]; 639 640 /* notify peers we're leaving */ 641 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s); 642 643 hapd->num_plinks = 0; 644 hostapd_free_stas(hapd); 645 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 646 } 647 648 649 /* for mesh_rsn to indicate this peer has completed authentication, and we're 650 * ready to start AMPE */ 651 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 652 { 653 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 654 struct hostapd_sta_add_params params; 655 struct sta_info *sta; 656 int ret; 657 658 sta = ap_get_sta(data, addr); 659 if (!sta) { 660 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer"); 661 return; 662 } 663 664 /* TODO: Should do nothing if this STA is already authenticated, but 665 * the AP code already sets this flag. */ 666 sta->flags |= WLAN_STA_AUTH; 667 668 mesh_rsn_init_ampe_sta(wpa_s, sta); 669 670 os_memset(¶ms, 0, sizeof(params)); 671 params.addr = sta->addr; 672 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED; 673 params.set = 1; 674 675 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR, 676 MAC2STR(sta->addr)); 677 ret = wpa_drv_sta_add(wpa_s, ¶ms); 678 if (ret) { 679 wpa_msg(wpa_s, MSG_ERROR, 680 "Driver failed to set " MACSTR ": %d", 681 MAC2STR(sta->addr), ret); 682 } 683 684 if (!sta->my_lid) 685 mesh_mpm_init_link(wpa_s, sta); 686 687 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 688 } 689 690 /* 691 * Initialize a sta_info structure for a peer and upload it into the driver 692 * in preparation for beginning authentication or peering. This is done when a 693 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is 694 * received from the peer for the first time. 695 */ 696 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s, 697 const u8 *addr, 698 struct ieee802_11_elems *elems) 699 { 700 struct hostapd_sta_add_params params; 701 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 702 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 703 struct sta_info *sta; 704 struct ieee80211_ht_operation *oper; 705 int ret; 706 707 if (elems->mesh_config_len >= 7 && 708 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) { 709 wpa_msg(wpa_s, MSG_DEBUG, 710 "mesh: Ignore a crowded peer " MACSTR, 711 MAC2STR(addr)); 712 return NULL; 713 } 714 715 sta = ap_get_sta(data, addr); 716 if (sta) 717 return NULL; 718 719 sta = ap_sta_add(data, addr); 720 if (!sta) 721 return NULL; 722 723 /* Set WMM by default since Mesh STAs are QoS STAs */ 724 sta->flags |= WLAN_STA_WMM; 725 726 /* initialize sta */ 727 if (copy_supp_rates(wpa_s, sta, elems)) { 728 ap_free_sta(data, sta); 729 return NULL; 730 } 731 732 if (!sta->my_lid) 733 mesh_mpm_init_link(wpa_s, sta); 734 735 copy_sta_ht_capab(data, sta, elems->ht_capabilities); 736 737 oper = (struct ieee80211_ht_operation *) elems->ht_operation; 738 if (oper && 739 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) && 740 sta->ht_capabilities) { 741 wpa_msg(wpa_s, MSG_DEBUG, MACSTR 742 " does not support 40 MHz bandwidth", 743 MAC2STR(sta->addr)); 744 set_disable_ht40(sta->ht_capabilities, 1); 745 } 746 747 update_ht_state(data, sta); 748 749 #ifdef CONFIG_IEEE80211AC 750 copy_sta_vht_capab(data, sta, elems->vht_capabilities); 751 copy_sta_vht_oper(data, sta, elems->vht_operation); 752 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif); 753 #endif /* CONFIG_IEEE80211AC */ 754 755 #ifdef CONFIG_IEEE80211AX 756 copy_sta_he_capab(data, sta, IEEE80211_MODE_MESH, 757 elems->he_capabilities, elems->he_capabilities_len); 758 copy_sta_he_6ghz_capab(data, sta, elems->he_6ghz_band_cap); 759 #endif /* CONFIG_IEEE80211AX */ 760 761 if (hostapd_get_aid(data, sta) < 0) { 762 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available"); 763 ap_free_sta(data, sta); 764 return NULL; 765 } 766 767 /* insert into driver */ 768 os_memset(¶ms, 0, sizeof(params)); 769 params.supp_rates = sta->supported_rates; 770 params.supp_rates_len = sta->supported_rates_len; 771 params.addr = addr; 772 params.plink_state = sta->plink_state; 773 params.aid = sta->aid; 774 params.peer_aid = sta->peer_aid; 775 params.listen_interval = 100; 776 params.ht_capabilities = sta->ht_capabilities; 777 params.vht_capabilities = sta->vht_capabilities; 778 params.he_capab = sta->he_capab; 779 params.he_capab_len = sta->he_capab_len; 780 params.he_6ghz_capab = sta->he_6ghz_capab; 781 params.flags |= WPA_STA_WMM; 782 params.flags_mask |= WPA_STA_AUTHENTICATED; 783 if (conf->security == MESH_CONF_SEC_NONE) { 784 params.flags |= WPA_STA_AUTHORIZED; 785 params.flags |= WPA_STA_AUTHENTICATED; 786 } else { 787 sta->flags |= WLAN_STA_MFP; 788 params.flags |= WPA_STA_MFP; 789 } 790 791 ret = wpa_drv_sta_add(wpa_s, ¶ms); 792 if (ret) { 793 wpa_msg(wpa_s, MSG_ERROR, 794 "Driver failed to insert " MACSTR ": %d", 795 MAC2STR(addr), ret); 796 ap_free_sta(data, sta); 797 return NULL; 798 } 799 800 return sta; 801 } 802 803 804 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 805 struct ieee802_11_elems *elems) 806 { 807 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 808 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 809 struct sta_info *sta; 810 struct wpa_ssid *ssid = wpa_s->current_ssid; 811 812 sta = mesh_mpm_add_peer(wpa_s, addr, elems); 813 if (!sta) 814 return; 815 816 if (ssid && ssid->no_auto_peer && 817 (is_zero_ether_addr(data->mesh_required_peer) || 818 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) { 819 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with " 820 MACSTR " because of no_auto_peer", MAC2STR(addr)); 821 if (data->mesh_pending_auth) { 822 struct os_reltime age; 823 const struct ieee80211_mgmt *mgmt; 824 struct hostapd_frame_info fi; 825 826 mgmt = wpabuf_head(data->mesh_pending_auth); 827 os_reltime_age(&data->mesh_pending_auth_time, &age); 828 if (age.sec < 2 && 829 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) { 830 wpa_printf(MSG_DEBUG, 831 "mesh: Process pending Authentication frame from %u.%06u seconds ago", 832 (unsigned int) age.sec, 833 (unsigned int) age.usec); 834 os_memset(&fi, 0, sizeof(fi)); 835 ieee802_11_mgmt( 836 data, 837 wpabuf_head(data->mesh_pending_auth), 838 wpabuf_len(data->mesh_pending_auth), 839 &fi); 840 } 841 wpabuf_free(data->mesh_pending_auth); 842 data->mesh_pending_auth = NULL; 843 } 844 return; 845 } 846 847 if (conf->security == MESH_CONF_SEC_NONE) { 848 if (sta->plink_state < PLINK_OPN_SNT || 849 sta->plink_state > PLINK_ESTAB) 850 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 851 } else { 852 mesh_rsn_auth_sae_sta(wpa_s, sta); 853 } 854 } 855 856 857 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt) 858 { 859 struct hostapd_frame_info fi; 860 861 os_memset(&fi, 0, sizeof(fi)); 862 fi.datarate = rx_mgmt->datarate; 863 fi.ssi_signal = rx_mgmt->ssi_signal; 864 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame, 865 rx_mgmt->frame_len, &fi); 866 } 867 868 869 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s, 870 struct sta_info *sta) 871 { 872 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 873 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 874 u8 seq[6] = {}; 875 876 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established", 877 MAC2STR(sta->addr)); 878 879 if (conf->security & MESH_CONF_SEC_AMPE) { 880 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len); 881 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher), 882 sta->addr, 0, 0, seq, sizeof(seq), 883 sta->mtk, sta->mtk_len, 884 KEY_FLAG_PAIRWISE_RX_TX); 885 886 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC", 887 sta->mgtk_rsc, sizeof(sta->mgtk_rsc)); 888 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK", 889 sta->mgtk, sta->mgtk_len); 890 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher), 891 sta->addr, sta->mgtk_key_id, 0, 892 sta->mgtk_rsc, sizeof(sta->mgtk_rsc), 893 sta->mgtk, sta->mgtk_len, 894 KEY_FLAG_GROUP_RX); 895 896 if (sta->igtk_len) { 897 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC", 898 sta->igtk_rsc, sizeof(sta->igtk_rsc)); 899 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK", 900 sta->igtk, sta->igtk_len); 901 wpa_drv_set_key( 902 wpa_s, 903 wpa_cipher_to_alg(conf->mgmt_group_cipher), 904 sta->addr, sta->igtk_key_id, 0, 905 sta->igtk_rsc, sizeof(sta->igtk_rsc), 906 sta->igtk, sta->igtk_len, 907 KEY_FLAG_GROUP_RX); 908 } 909 } 910 911 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB); 912 hapd->num_plinks++; 913 914 sta->flags |= WLAN_STA_ASSOC; 915 sta->mesh_sae_pmksa_caching = 0; 916 917 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 918 peer_add_timer(wpa_s, NULL); 919 eloop_cancel_timeout(plink_timer, wpa_s, sta); 920 921 /* Send ctrl event */ 922 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR, 923 MAC2STR(sta->addr)); 924 925 /* Send D-Bus event */ 926 wpas_notify_mesh_peer_connected(wpa_s, sta->addr); 927 } 928 929 930 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta, 931 enum plink_event event, u16 reason) 932 { 933 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 934 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 935 936 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s", 937 MAC2STR(sta->addr), mplstate[sta->plink_state], 938 mplevent[event]); 939 940 switch (sta->plink_state) { 941 case PLINK_IDLE: 942 switch (event) { 943 case CLS_ACPT: 944 mesh_mpm_fsm_restart(wpa_s, sta); 945 break; 946 case OPN_ACPT: 947 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD); 948 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 949 0); 950 break; 951 case REQ_RJCT: 952 mesh_mpm_send_plink_action(wpa_s, sta, 953 PLINK_CLOSE, reason); 954 break; 955 default: 956 break; 957 } 958 break; 959 case PLINK_OPN_SNT: 960 switch (event) { 961 case OPN_RJCT: 962 case CNF_RJCT: 963 if (!reason) 964 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 965 /* fall-through */ 966 case CLS_ACPT: 967 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 968 if (!reason) 969 reason = WLAN_REASON_MESH_CLOSE_RCVD; 970 eloop_register_timeout( 971 conf->dot11MeshHoldingTimeout / 1000, 972 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 973 plink_timer, wpa_s, sta); 974 mesh_mpm_send_plink_action(wpa_s, sta, 975 PLINK_CLOSE, reason); 976 break; 977 case OPN_ACPT: 978 /* retry timer is left untouched */ 979 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD); 980 mesh_mpm_send_plink_action(wpa_s, sta, 981 PLINK_CONFIRM, 0); 982 break; 983 case CNF_ACPT: 984 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD); 985 eloop_cancel_timeout(plink_timer, wpa_s, sta); 986 eloop_register_timeout( 987 conf->dot11MeshConfirmTimeout / 1000, 988 (conf->dot11MeshConfirmTimeout % 1000) * 1000, 989 plink_timer, wpa_s, sta); 990 break; 991 default: 992 break; 993 } 994 break; 995 case PLINK_OPN_RCVD: 996 switch (event) { 997 case OPN_RJCT: 998 case CNF_RJCT: 999 if (!reason) 1000 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 1001 /* fall-through */ 1002 case CLS_ACPT: 1003 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 1004 if (!reason) 1005 reason = WLAN_REASON_MESH_CLOSE_RCVD; 1006 eloop_register_timeout( 1007 conf->dot11MeshHoldingTimeout / 1000, 1008 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1009 plink_timer, wpa_s, sta); 1010 sta->mpm_close_reason = reason; 1011 mesh_mpm_send_plink_action(wpa_s, sta, 1012 PLINK_CLOSE, reason); 1013 break; 1014 case OPN_ACPT: 1015 mesh_mpm_send_plink_action(wpa_s, sta, 1016 PLINK_CONFIRM, 0); 1017 break; 1018 case CNF_ACPT: 1019 if (conf->security & MESH_CONF_SEC_AMPE) 1020 mesh_rsn_derive_mtk(wpa_s, sta); 1021 mesh_mpm_plink_estab(wpa_s, sta); 1022 break; 1023 default: 1024 break; 1025 } 1026 break; 1027 case PLINK_CNF_RCVD: 1028 switch (event) { 1029 case OPN_RJCT: 1030 case CNF_RJCT: 1031 if (!reason) 1032 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 1033 /* fall-through */ 1034 case CLS_ACPT: 1035 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 1036 if (!reason) 1037 reason = WLAN_REASON_MESH_CLOSE_RCVD; 1038 eloop_register_timeout( 1039 conf->dot11MeshHoldingTimeout / 1000, 1040 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1041 plink_timer, wpa_s, sta); 1042 sta->mpm_close_reason = reason; 1043 mesh_mpm_send_plink_action(wpa_s, sta, 1044 PLINK_CLOSE, reason); 1045 break; 1046 case OPN_ACPT: 1047 if (conf->security & MESH_CONF_SEC_AMPE) 1048 mesh_rsn_derive_mtk(wpa_s, sta); 1049 mesh_mpm_plink_estab(wpa_s, sta); 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_ESTAB: 1058 switch (event) { 1059 case OPN_RJCT: 1060 case CNF_RJCT: 1061 case CLS_ACPT: 1062 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 1063 if (!reason) 1064 reason = WLAN_REASON_MESH_CLOSE_RCVD; 1065 1066 eloop_register_timeout( 1067 conf->dot11MeshHoldingTimeout / 1000, 1068 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1069 plink_timer, wpa_s, sta); 1070 sta->mpm_close_reason = reason; 1071 1072 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR 1073 " closed with reason %d", 1074 MAC2STR(sta->addr), reason); 1075 1076 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR, 1077 MAC2STR(sta->addr)); 1078 1079 /* Send D-Bus event */ 1080 wpas_notify_mesh_peer_disconnected(wpa_s, sta->addr, 1081 reason); 1082 1083 hapd->num_plinks--; 1084 1085 mesh_mpm_send_plink_action(wpa_s, sta, 1086 PLINK_CLOSE, reason); 1087 break; 1088 case OPN_ACPT: 1089 mesh_mpm_send_plink_action(wpa_s, sta, 1090 PLINK_CONFIRM, 0); 1091 break; 1092 default: 1093 break; 1094 } 1095 break; 1096 case PLINK_HOLDING: 1097 switch (event) { 1098 case CLS_ACPT: 1099 mesh_mpm_fsm_restart(wpa_s, sta); 1100 break; 1101 case OPN_ACPT: 1102 case CNF_ACPT: 1103 case OPN_RJCT: 1104 case CNF_RJCT: 1105 reason = sta->mpm_close_reason; 1106 mesh_mpm_send_plink_action(wpa_s, sta, 1107 PLINK_CLOSE, reason); 1108 break; 1109 default: 1110 break; 1111 } 1112 break; 1113 default: 1114 wpa_msg(wpa_s, MSG_DEBUG, 1115 "Unsupported MPM event %s for state %s", 1116 mplevent[event], mplstate[sta->plink_state]); 1117 break; 1118 } 1119 } 1120 1121 1122 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s, 1123 const struct ieee80211_mgmt *mgmt, size_t len) 1124 { 1125 u8 action_field; 1126 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 1127 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 1128 struct sta_info *sta; 1129 u16 plid = 0, llid = 0, aid = 0; 1130 enum plink_event event; 1131 struct ieee802_11_elems elems; 1132 struct mesh_peer_mgmt_ie peer_mgmt_ie; 1133 const u8 *ies; 1134 size_t ie_len; 1135 int ret; 1136 u16 reason = 0; 1137 1138 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED) 1139 return; 1140 1141 action_field = mgmt->u.action.u.slf_prot_action.action; 1142 if (action_field != PLINK_OPEN && 1143 action_field != PLINK_CONFIRM && 1144 action_field != PLINK_CLOSE) 1145 return; 1146 1147 ies = mgmt->u.action.u.slf_prot_action.variable; 1148 ie_len = (const u8 *) mgmt + len - 1149 mgmt->u.action.u.slf_prot_action.variable; 1150 1151 /* at least expect mesh id and peering mgmt */ 1152 if (ie_len < 2 + 2) { 1153 wpa_printf(MSG_DEBUG, 1154 "MPM: Ignore too short action frame %u ie_len %u", 1155 action_field, (unsigned int) ie_len); 1156 return; 1157 } 1158 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field); 1159 1160 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) { 1161 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x", 1162 WPA_GET_LE16(ies)); 1163 ies += 2; /* capability */ 1164 ie_len -= 2; 1165 } 1166 if (action_field == PLINK_CONFIRM) { 1167 aid = WPA_GET_LE16(ies); 1168 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid); 1169 ies += 2; /* aid */ 1170 ie_len -= 2; 1171 } 1172 1173 /* check for mesh peering, mesh id and mesh config IEs */ 1174 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) { 1175 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs"); 1176 return; 1177 } 1178 if (!elems.peer_mgmt) { 1179 wpa_printf(MSG_DEBUG, 1180 "MPM: No Mesh Peering Management element"); 1181 return; 1182 } 1183 if (action_field != PLINK_CLOSE) { 1184 if (!elems.mesh_id || !elems.mesh_config) { 1185 wpa_printf(MSG_DEBUG, 1186 "MPM: No Mesh ID or Mesh Configuration element"); 1187 return; 1188 } 1189 1190 if (!matches_local(wpa_s, &elems)) { 1191 wpa_printf(MSG_DEBUG, 1192 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS"); 1193 return; 1194 } 1195 } 1196 1197 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field, 1198 elems.peer_mgmt, 1199 elems.peer_mgmt_len, 1200 &peer_mgmt_ie); 1201 if (ret) { 1202 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame"); 1203 return; 1204 } 1205 1206 /* the sender's llid is our plid and vice-versa */ 1207 plid = WPA_GET_LE16(peer_mgmt_ie.llid); 1208 if (peer_mgmt_ie.plid) 1209 llid = WPA_GET_LE16(peer_mgmt_ie.plid); 1210 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid); 1211 1212 if (action_field == PLINK_CLOSE) 1213 wpa_printf(MSG_DEBUG, "MPM: close reason=%u", 1214 WPA_GET_LE16(peer_mgmt_ie.reason)); 1215 1216 sta = ap_get_sta(hapd, mgmt->sa); 1217 1218 /* 1219 * If this is an open frame from an unknown STA, and this is an 1220 * open mesh, then go ahead and add the peer before proceeding. 1221 */ 1222 if (!sta && action_field == PLINK_OPEN && 1223 (!(mconf->security & MESH_CONF_SEC_AMPE) || 1224 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL))) 1225 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems); 1226 1227 if (!sta) { 1228 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer"); 1229 return; 1230 } 1231 1232 #ifdef CONFIG_SAE 1233 /* peer is in sae_accepted? */ 1234 if (sta->sae && sta->sae->state != SAE_ACCEPTED) { 1235 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer"); 1236 return; 1237 } 1238 #endif /* CONFIG_SAE */ 1239 1240 if (!sta->my_lid) 1241 mesh_mpm_init_link(wpa_s, sta); 1242 1243 if (mconf->security & MESH_CONF_SEC_AMPE) { 1244 int res; 1245 1246 res = mesh_rsn_process_ampe(wpa_s, sta, &elems, 1247 &mgmt->u.action.category, 1248 peer_mgmt_ie.chosen_pmk, 1249 ies, ie_len); 1250 if (res) { 1251 wpa_printf(MSG_DEBUG, 1252 "MPM: RSN process rejected frame (res=%d)", 1253 res); 1254 if (action_field == PLINK_OPEN && res == -2) { 1255 /* AES-SIV decryption failed */ 1256 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT, 1257 WLAN_REASON_MESH_INVALID_GTK); 1258 } 1259 return; 1260 } 1261 1262 #ifdef CONFIG_OCV 1263 if (action_field == PLINK_OPEN && elems.rsn_ie) { 1264 struct wpa_state_machine *sm = sta->wpa_sm; 1265 struct wpa_ie_data data; 1266 1267 res = wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 1268 elems.rsn_ie_len + 2, 1269 &data); 1270 if (res) { 1271 wpa_printf(MSG_DEBUG, 1272 "Failed to parse RSN IE (res=%d)", 1273 res); 1274 wpa_hexdump(MSG_DEBUG, "RSN IE", elems.rsn_ie, 1275 elems.rsn_ie_len); 1276 return; 1277 } 1278 1279 wpa_auth_set_ocv(sm, mconf->ocv && 1280 (data.capabilities & 1281 WPA_CAPABILITY_OCVC)); 1282 } 1283 1284 if (action_field != PLINK_CLOSE && 1285 wpa_auth_uses_ocv(sta->wpa_sm)) { 1286 struct wpa_channel_info ci; 1287 int tx_chanwidth; 1288 int tx_seg1_idx; 1289 1290 if (wpa_drv_channel_info(wpa_s, &ci) != 0) { 1291 wpa_printf(MSG_WARNING, 1292 "MPM: Failed to get channel info to validate received OCI in MPM Confirm"); 1293 return; 1294 } 1295 1296 if (get_tx_parameters( 1297 sta, channel_width_to_int(ci.chanwidth), 1298 ci.seg1_idx, &tx_chanwidth, 1299 &tx_seg1_idx) < 0) 1300 return; 1301 1302 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, 1303 tx_chanwidth, tx_seg1_idx) != 1304 OCI_SUCCESS) { 1305 wpa_printf(MSG_WARNING, "MPM: OCV failed: %s", 1306 ocv_errorstr); 1307 return; 1308 } 1309 } 1310 #endif /* CONFIG_OCV */ 1311 } 1312 1313 if (sta->plink_state == PLINK_BLOCKED) { 1314 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED"); 1315 return; 1316 } 1317 1318 /* Now we will figure out the appropriate event... */ 1319 switch (action_field) { 1320 case PLINK_OPEN: 1321 if (plink_free_count(hapd) == 0) { 1322 event = REQ_RJCT; 1323 reason = WLAN_REASON_MESH_MAX_PEERS; 1324 wpa_printf(MSG_INFO, 1325 "MPM: Peer link num over quota(%d)", 1326 hapd->max_plinks); 1327 } else if (sta->peer_lid && sta->peer_lid != plid) { 1328 wpa_printf(MSG_DEBUG, 1329 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1330 sta->peer_lid, plid); 1331 return; /* no FSM event */ 1332 } else { 1333 sta->peer_lid = plid; 1334 event = OPN_ACPT; 1335 } 1336 break; 1337 case PLINK_CONFIRM: 1338 if (plink_free_count(hapd) == 0) { 1339 event = REQ_RJCT; 1340 reason = WLAN_REASON_MESH_MAX_PEERS; 1341 wpa_printf(MSG_INFO, 1342 "MPM: Peer link num over quota(%d)", 1343 hapd->max_plinks); 1344 } else if (sta->my_lid != llid || 1345 (sta->peer_lid && sta->peer_lid != plid)) { 1346 wpa_printf(MSG_DEBUG, 1347 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x", 1348 sta->my_lid, llid, sta->peer_lid, plid); 1349 return; /* no FSM event */ 1350 } else { 1351 if (!sta->peer_lid) 1352 sta->peer_lid = plid; 1353 sta->peer_aid = aid; 1354 event = CNF_ACPT; 1355 } 1356 break; 1357 case PLINK_CLOSE: 1358 if (sta->plink_state == PLINK_ESTAB) 1359 /* Do not check for llid or plid. This does not 1360 * follow the standard but since multiple plinks 1361 * per cand are not supported, it is necessary in 1362 * order to avoid a livelock when MP A sees an 1363 * establish peer link to MP B but MP B does not 1364 * see it. This can be caused by a timeout in 1365 * B's peer link establishment or B being 1366 * restarted. 1367 */ 1368 event = CLS_ACPT; 1369 else if (sta->peer_lid != plid) { 1370 wpa_printf(MSG_DEBUG, 1371 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1372 sta->peer_lid, plid); 1373 return; /* no FSM event */ 1374 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) { 1375 wpa_printf(MSG_DEBUG, 1376 "MPM: my_lid mismatch: 0x%x != 0x%x", 1377 sta->my_lid, llid); 1378 return; /* no FSM event */ 1379 } else { 1380 event = CLS_ACPT; 1381 } 1382 break; 1383 default: 1384 /* 1385 * This cannot be hit due to the action_field check above, but 1386 * compilers may not be able to figure that out and can warn 1387 * about uninitialized event below. 1388 */ 1389 return; 1390 } 1391 mesh_mpm_fsm(wpa_s, sta, event, reason); 1392 } 1393 1394 1395 /* called by ap_free_sta */ 1396 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta) 1397 { 1398 if (sta->plink_state == PLINK_ESTAB) 1399 hapd->num_plinks--; 1400 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta); 1401 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta); 1402 } 1403