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 } 255 #endif /* CONFIG_IEEE80211AX */ 256 if (type != PLINK_CLOSE) 257 buf_len += conf->rsn_ie_len; /* RSN IE */ 258 #ifdef CONFIG_OCV 259 /* OCI is included even when the other STA doesn't support OCV */ 260 if (type != PLINK_CLOSE && conf->ocv) 261 buf_len += OCV_OCI_EXTENDED_LEN; 262 #endif /* CONFIG_OCV */ 263 264 buf = wpabuf_alloc(buf_len); 265 if (!buf) 266 return; 267 268 cat = wpabuf_mhead_u8(buf); 269 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED); 270 wpabuf_put_u8(buf, type); 271 272 if (type != PLINK_CLOSE) { 273 u8 info; 274 275 /* capability info */ 276 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0); 277 278 /* aid */ 279 if (type == PLINK_CONFIRM) 280 wpabuf_put_le16(buf, sta->aid); 281 282 /* IE: supp + ext. supp rates */ 283 pos = hostapd_eid_supp_rates(bss, supp_rates); 284 pos = hostapd_eid_ext_supp_rates(bss, pos); 285 wpabuf_put_data(buf, supp_rates, pos - supp_rates); 286 287 /* IE: RSN IE */ 288 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len); 289 290 /* IE: Mesh ID */ 291 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 292 wpabuf_put_u8(buf, conf->meshid_len); 293 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 294 295 /* IE: mesh conf */ 296 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG); 297 wpabuf_put_u8(buf, 7); 298 wpabuf_put_u8(buf, conf->mesh_pp_id); 299 wpabuf_put_u8(buf, conf->mesh_pm_id); 300 wpabuf_put_u8(buf, conf->mesh_cc_id); 301 wpabuf_put_u8(buf, conf->mesh_sp_id); 302 wpabuf_put_u8(buf, conf->mesh_auth_id); 303 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1; 304 /* TODO: Add Connected to Mesh Gate/AS subfields */ 305 wpabuf_put_u8(buf, info); 306 /* always forwarding & accepting plinks for now */ 307 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER | 308 MESH_CAP_FORWARDING); 309 } else { /* Peer closing frame */ 310 /* IE: Mesh ID */ 311 wpabuf_put_u8(buf, WLAN_EID_MESH_ID); 312 wpabuf_put_u8(buf, conf->meshid_len); 313 wpabuf_put_data(buf, conf->meshid, conf->meshid_len); 314 } 315 316 /* IE: Mesh Peering Management element */ 317 ie_len = 4; 318 if (ampe) 319 ie_len += PMKID_LEN; 320 switch (type) { 321 case PLINK_OPEN: 322 break; 323 case PLINK_CONFIRM: 324 ie_len += 2; 325 add_plid = 1; 326 break; 327 case PLINK_CLOSE: 328 ie_len += 2; 329 add_plid = 1; 330 ie_len += 2; /* reason code */ 331 break; 332 } 333 334 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT); 335 wpabuf_put_u8(buf, ie_len); 336 /* peering protocol */ 337 if (ampe) 338 wpabuf_put_le16(buf, 1); 339 else 340 wpabuf_put_le16(buf, 0); 341 wpabuf_put_le16(buf, sta->my_lid); 342 if (add_plid) 343 wpabuf_put_le16(buf, sta->peer_lid); 344 if (type == PLINK_CLOSE) 345 wpabuf_put_le16(buf, close_reason); 346 if (ampe) { 347 if (sta->sae == NULL) { 348 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session"); 349 goto fail; 350 } 351 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta, 352 wpabuf_put(buf, PMKID_LEN)); 353 } 354 355 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) { 356 u8 ht_capa_oper[2 + 26 + 2 + 22]; 357 358 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper); 359 pos = hostapd_eid_ht_operation(bss, pos); 360 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper); 361 } 362 #ifdef CONFIG_IEEE80211AC 363 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) { 364 u8 vht_capa_oper[2 + 12 + 2 + 5]; 365 366 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0); 367 pos = hostapd_eid_vht_operation(bss, pos); 368 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper); 369 } 370 #endif /* CONFIG_IEEE80211AC */ 371 #ifdef CONFIG_IEEE80211AX 372 if (type != PLINK_CLOSE && wpa_s->mesh_he_enabled) { 373 u8 he_capa_oper[3 + 374 HE_MAX_MAC_CAPAB_SIZE + 375 HE_MAX_PHY_CAPAB_SIZE + 376 HE_MAX_MCS_CAPAB_SIZE + 377 HE_MAX_PPET_CAPAB_SIZE + 378 3 + sizeof(struct ieee80211_he_operation)]; 379 380 pos = hostapd_eid_he_capab(bss, he_capa_oper, 381 IEEE80211_MODE_MESH); 382 pos = hostapd_eid_he_operation(bss, pos); 383 wpabuf_put_data(buf, he_capa_oper, pos - he_capa_oper); 384 } 385 #endif /* CONFIG_IEEE80211AX */ 386 387 #ifdef CONFIG_OCV 388 if (type != PLINK_CLOSE && conf->ocv) { 389 struct wpa_channel_info ci; 390 391 if (wpa_drv_channel_info(wpa_s, &ci) != 0) { 392 wpa_printf(MSG_WARNING, 393 "Mesh MPM: Failed to get channel info for OCI element"); 394 goto fail; 395 } 396 397 pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN); 398 if (ocv_insert_extended_oci(&ci, pos) < 0) 399 goto fail; 400 } 401 #endif /* CONFIG_OCV */ 402 403 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) { 404 wpa_msg(wpa_s, MSG_INFO, 405 "Mesh MPM: failed to add AMPE and MIC IE"); 406 goto fail; 407 } 408 409 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to " 410 MACSTR " (my_lid=0x%x peer_lid=0x%x)", 411 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid); 412 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, 413 sta->addr, wpa_s->own_addr, wpa_s->own_addr, 414 wpabuf_head(buf), wpabuf_len(buf), 0); 415 if (ret < 0) 416 wpa_msg(wpa_s, MSG_INFO, 417 "Mesh MPM: failed to send peering frame"); 418 419 fail: 420 wpabuf_free(buf); 421 } 422 423 424 /* configure peering state in ours and driver's station entry */ 425 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, 426 struct sta_info *sta, 427 enum mesh_plink_state state) 428 { 429 struct hostapd_sta_add_params params; 430 int ret; 431 432 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s", 433 MAC2STR(sta->addr), mplstate[sta->plink_state], 434 mplstate[state]); 435 sta->plink_state = state; 436 437 os_memset(¶ms, 0, sizeof(params)); 438 params.addr = sta->addr; 439 params.plink_state = state; 440 params.peer_aid = sta->peer_aid; 441 params.set = 1; 442 443 ret = wpa_drv_sta_add(wpa_s, ¶ms); 444 if (ret) { 445 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR 446 ": %d", MAC2STR(sta->addr), ret); 447 } 448 } 449 450 451 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s, 452 struct sta_info *sta) 453 { 454 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 455 456 eloop_cancel_timeout(plink_timer, wpa_s, sta); 457 458 ap_free_sta(hapd, sta); 459 } 460 461 462 static void plink_timer(void *eloop_ctx, void *user_data) 463 { 464 struct wpa_supplicant *wpa_s = eloop_ctx; 465 struct sta_info *sta = user_data; 466 u16 reason = 0; 467 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 468 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 469 470 switch (sta->plink_state) { 471 case PLINK_OPN_RCVD: 472 case PLINK_OPN_SNT: 473 /* retry timer */ 474 if (sta->mpm_retries < conf->dot11MeshMaxRetries) { 475 eloop_register_timeout( 476 conf->dot11MeshRetryTimeout / 1000, 477 (conf->dot11MeshRetryTimeout % 1000) * 1000, 478 plink_timer, wpa_s, sta); 479 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 480 sta->mpm_retries++; 481 break; 482 } 483 reason = WLAN_REASON_MESH_MAX_RETRIES; 484 /* fall through */ 485 486 case PLINK_CNF_RCVD: 487 /* confirm timer */ 488 if (!reason) 489 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT; 490 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 491 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000, 492 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 493 plink_timer, wpa_s, sta); 494 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 495 break; 496 case PLINK_HOLDING: 497 /* holding timer */ 498 499 if (sta->mesh_sae_pmksa_caching) { 500 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR 501 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it", 502 MAC2STR(sta->addr)); 503 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr); 504 } 505 mesh_mpm_fsm_restart(wpa_s, sta); 506 break; 507 default: 508 break; 509 } 510 } 511 512 513 /* initiate peering with station */ 514 static void 515 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta, 516 enum mesh_plink_state next_state) 517 { 518 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 519 520 eloop_cancel_timeout(plink_timer, wpa_s, sta); 521 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000, 522 (conf->dot11MeshRetryTimeout % 1000) * 1000, 523 plink_timer, wpa_s, sta); 524 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0); 525 wpa_mesh_set_plink_state(wpa_s, sta, next_state); 526 } 527 528 529 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta, 530 void *ctx) 531 { 532 struct wpa_supplicant *wpa_s = ctx; 533 int reason = WLAN_REASON_MESH_PEERING_CANCELLED; 534 535 if (sta) { 536 if (sta->plink_state == PLINK_ESTAB) 537 hapd->num_plinks--; 538 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 539 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason); 540 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR, 541 MAC2STR(sta->addr)); 542 eloop_cancel_timeout(plink_timer, wpa_s, sta); 543 eloop_cancel_timeout(mesh_auth_timer, wpa_s, sta); 544 return 0; 545 } 546 547 return 1; 548 } 549 550 551 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 552 { 553 struct hostapd_data *hapd; 554 struct sta_info *sta; 555 556 if (!wpa_s->ifmsh) { 557 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 558 return -1; 559 } 560 561 hapd = wpa_s->ifmsh->bss[0]; 562 sta = ap_get_sta(hapd, addr); 563 if (!sta) { 564 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 565 return -1; 566 } 567 568 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1; 569 } 570 571 572 static void peer_add_timer(void *eloop_ctx, void *user_data) 573 { 574 struct wpa_supplicant *wpa_s = eloop_ctx; 575 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 576 577 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN); 578 } 579 580 581 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 582 int duration) 583 { 584 struct wpa_ssid *ssid = wpa_s->current_ssid; 585 struct hostapd_data *hapd; 586 struct sta_info *sta; 587 struct mesh_conf *conf; 588 589 if (!wpa_s->ifmsh) { 590 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet"); 591 return -1; 592 } 593 594 if (!ssid || !ssid->no_auto_peer) { 595 wpa_msg(wpa_s, MSG_INFO, 596 "This command is available only with no_auto_peer mesh network"); 597 return -1; 598 } 599 600 hapd = wpa_s->ifmsh->bss[0]; 601 conf = wpa_s->ifmsh->mconf; 602 603 sta = ap_get_sta(hapd, addr); 604 if (!sta) { 605 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer"); 606 return -1; 607 } 608 609 if ((PLINK_OPN_SNT <= sta->plink_state && 610 sta->plink_state <= PLINK_ESTAB) || 611 (sta->sae && sta->sae->state > SAE_NOTHING)) { 612 wpa_msg(wpa_s, MSG_INFO, 613 "Specified peer is connecting/connected"); 614 return -1; 615 } 616 617 if (conf->security == MESH_CONF_SEC_NONE) { 618 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 619 } else { 620 mesh_rsn_auth_sae_sta(wpa_s, sta); 621 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN); 622 eloop_register_timeout(duration == -1 ? 10 : duration, 0, 623 peer_add_timer, wpa_s, NULL); 624 } 625 626 return 0; 627 } 628 629 630 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh) 631 { 632 struct hostapd_data *hapd = ifmsh->bss[0]; 633 634 /* notify peers we're leaving */ 635 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s); 636 637 hapd->num_plinks = 0; 638 hostapd_free_stas(hapd); 639 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 640 } 641 642 643 /* for mesh_rsn to indicate this peer has completed authentication, and we're 644 * ready to start AMPE */ 645 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr) 646 { 647 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 648 struct hostapd_sta_add_params params; 649 struct sta_info *sta; 650 int ret; 651 652 sta = ap_get_sta(data, addr); 653 if (!sta) { 654 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer"); 655 return; 656 } 657 658 /* TODO: Should do nothing if this STA is already authenticated, but 659 * the AP code already sets this flag. */ 660 sta->flags |= WLAN_STA_AUTH; 661 662 mesh_rsn_init_ampe_sta(wpa_s, sta); 663 664 os_memset(¶ms, 0, sizeof(params)); 665 params.addr = sta->addr; 666 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED; 667 params.set = 1; 668 669 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR, 670 MAC2STR(sta->addr)); 671 ret = wpa_drv_sta_add(wpa_s, ¶ms); 672 if (ret) { 673 wpa_msg(wpa_s, MSG_ERROR, 674 "Driver failed to set " MACSTR ": %d", 675 MAC2STR(sta->addr), ret); 676 } 677 678 if (!sta->my_lid) 679 mesh_mpm_init_link(wpa_s, sta); 680 681 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 682 } 683 684 /* 685 * Initialize a sta_info structure for a peer and upload it into the driver 686 * in preparation for beginning authentication or peering. This is done when a 687 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is 688 * received from the peer for the first time. 689 */ 690 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s, 691 const u8 *addr, 692 struct ieee802_11_elems *elems) 693 { 694 struct hostapd_sta_add_params params; 695 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 696 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 697 struct sta_info *sta; 698 struct ieee80211_ht_operation *oper; 699 int ret; 700 701 if (elems->mesh_config_len >= 7 && 702 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) { 703 wpa_msg(wpa_s, MSG_DEBUG, 704 "mesh: Ignore a crowded peer " MACSTR, 705 MAC2STR(addr)); 706 return NULL; 707 } 708 709 sta = ap_get_sta(data, addr); 710 if (sta) 711 return NULL; 712 713 sta = ap_sta_add(data, addr); 714 if (!sta) 715 return NULL; 716 717 /* Set WMM by default since Mesh STAs are QoS STAs */ 718 sta->flags |= WLAN_STA_WMM; 719 720 /* initialize sta */ 721 if (copy_supp_rates(wpa_s, sta, elems)) { 722 ap_free_sta(data, sta); 723 return NULL; 724 } 725 726 if (!sta->my_lid) 727 mesh_mpm_init_link(wpa_s, sta); 728 729 copy_sta_ht_capab(data, sta, elems->ht_capabilities); 730 731 oper = (struct ieee80211_ht_operation *) elems->ht_operation; 732 if (oper && 733 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) && 734 sta->ht_capabilities) { 735 wpa_msg(wpa_s, MSG_DEBUG, MACSTR 736 " does not support 40 MHz bandwidth", 737 MAC2STR(sta->addr)); 738 set_disable_ht40(sta->ht_capabilities, 1); 739 } 740 741 update_ht_state(data, sta); 742 743 #ifdef CONFIG_IEEE80211AC 744 copy_sta_vht_capab(data, sta, elems->vht_capabilities); 745 copy_sta_vht_oper(data, sta, elems->vht_operation); 746 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif); 747 #endif /* CONFIG_IEEE80211AC */ 748 749 #ifdef CONFIG_IEEE80211AX 750 copy_sta_he_capab(data, sta, IEEE80211_MODE_MESH, 751 elems->he_capabilities, elems->he_capabilities_len); 752 #endif /* CONFIG_IEEE80211AX */ 753 754 if (hostapd_get_aid(data, sta) < 0) { 755 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available"); 756 ap_free_sta(data, sta); 757 return NULL; 758 } 759 760 /* insert into driver */ 761 os_memset(¶ms, 0, sizeof(params)); 762 params.supp_rates = sta->supported_rates; 763 params.supp_rates_len = sta->supported_rates_len; 764 params.addr = addr; 765 params.plink_state = sta->plink_state; 766 params.aid = sta->aid; 767 params.peer_aid = sta->peer_aid; 768 params.listen_interval = 100; 769 params.ht_capabilities = sta->ht_capabilities; 770 params.vht_capabilities = sta->vht_capabilities; 771 params.he_capab = sta->he_capab; 772 params.he_capab_len = sta->he_capab_len; 773 params.flags |= WPA_STA_WMM; 774 params.flags_mask |= WPA_STA_AUTHENTICATED; 775 if (conf->security == MESH_CONF_SEC_NONE) { 776 params.flags |= WPA_STA_AUTHORIZED; 777 params.flags |= WPA_STA_AUTHENTICATED; 778 } else { 779 sta->flags |= WLAN_STA_MFP; 780 params.flags |= WPA_STA_MFP; 781 } 782 783 ret = wpa_drv_sta_add(wpa_s, ¶ms); 784 if (ret) { 785 wpa_msg(wpa_s, MSG_ERROR, 786 "Driver failed to insert " MACSTR ": %d", 787 MAC2STR(addr), ret); 788 ap_free_sta(data, sta); 789 return NULL; 790 } 791 792 return sta; 793 } 794 795 796 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr, 797 struct ieee802_11_elems *elems) 798 { 799 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 800 struct hostapd_data *data = wpa_s->ifmsh->bss[0]; 801 struct sta_info *sta; 802 struct wpa_ssid *ssid = wpa_s->current_ssid; 803 804 sta = mesh_mpm_add_peer(wpa_s, addr, elems); 805 if (!sta) 806 return; 807 808 if (ssid && ssid->no_auto_peer && 809 (is_zero_ether_addr(data->mesh_required_peer) || 810 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) { 811 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with " 812 MACSTR " because of no_auto_peer", MAC2STR(addr)); 813 if (data->mesh_pending_auth) { 814 struct os_reltime age; 815 const struct ieee80211_mgmt *mgmt; 816 struct hostapd_frame_info fi; 817 818 mgmt = wpabuf_head(data->mesh_pending_auth); 819 os_reltime_age(&data->mesh_pending_auth_time, &age); 820 if (age.sec < 2 && 821 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) { 822 wpa_printf(MSG_DEBUG, 823 "mesh: Process pending Authentication frame from %u.%06u seconds ago", 824 (unsigned int) age.sec, 825 (unsigned int) age.usec); 826 os_memset(&fi, 0, sizeof(fi)); 827 ieee802_11_mgmt( 828 data, 829 wpabuf_head(data->mesh_pending_auth), 830 wpabuf_len(data->mesh_pending_auth), 831 &fi); 832 } 833 wpabuf_free(data->mesh_pending_auth); 834 data->mesh_pending_auth = NULL; 835 } 836 return; 837 } 838 839 if (conf->security == MESH_CONF_SEC_NONE) { 840 if (sta->plink_state < PLINK_OPN_SNT || 841 sta->plink_state > PLINK_ESTAB) 842 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT); 843 } else { 844 mesh_rsn_auth_sae_sta(wpa_s, sta); 845 } 846 } 847 848 849 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt) 850 { 851 struct hostapd_frame_info fi; 852 853 os_memset(&fi, 0, sizeof(fi)); 854 fi.datarate = rx_mgmt->datarate; 855 fi.ssi_signal = rx_mgmt->ssi_signal; 856 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame, 857 rx_mgmt->frame_len, &fi); 858 } 859 860 861 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s, 862 struct sta_info *sta) 863 { 864 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 865 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 866 u8 seq[6] = {}; 867 868 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established", 869 MAC2STR(sta->addr)); 870 871 if (conf->security & MESH_CONF_SEC_AMPE) { 872 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len); 873 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher), 874 sta->addr, 0, 0, seq, sizeof(seq), 875 sta->mtk, sta->mtk_len, 876 KEY_FLAG_PAIRWISE_RX_TX); 877 878 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC", 879 sta->mgtk_rsc, sizeof(sta->mgtk_rsc)); 880 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK", 881 sta->mgtk, sta->mgtk_len); 882 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher), 883 sta->addr, sta->mgtk_key_id, 0, 884 sta->mgtk_rsc, sizeof(sta->mgtk_rsc), 885 sta->mgtk, sta->mgtk_len, 886 KEY_FLAG_GROUP_RX); 887 888 if (sta->igtk_len) { 889 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC", 890 sta->igtk_rsc, sizeof(sta->igtk_rsc)); 891 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK", 892 sta->igtk, sta->igtk_len); 893 wpa_drv_set_key( 894 wpa_s, 895 wpa_cipher_to_alg(conf->mgmt_group_cipher), 896 sta->addr, sta->igtk_key_id, 0, 897 sta->igtk_rsc, sizeof(sta->igtk_rsc), 898 sta->igtk, sta->igtk_len, 899 KEY_FLAG_GROUP_RX); 900 } 901 } 902 903 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB); 904 hapd->num_plinks++; 905 906 sta->flags |= WLAN_STA_ASSOC; 907 sta->mesh_sae_pmksa_caching = 0; 908 909 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL); 910 peer_add_timer(wpa_s, NULL); 911 eloop_cancel_timeout(plink_timer, wpa_s, sta); 912 913 /* Send ctrl event */ 914 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR, 915 MAC2STR(sta->addr)); 916 917 /* Send D-Bus event */ 918 wpas_notify_mesh_peer_connected(wpa_s, sta->addr); 919 } 920 921 922 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta, 923 enum plink_event event, u16 reason) 924 { 925 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 926 struct mesh_conf *conf = wpa_s->ifmsh->mconf; 927 928 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s", 929 MAC2STR(sta->addr), mplstate[sta->plink_state], 930 mplevent[event]); 931 932 switch (sta->plink_state) { 933 case PLINK_IDLE: 934 switch (event) { 935 case CLS_ACPT: 936 mesh_mpm_fsm_restart(wpa_s, sta); 937 break; 938 case OPN_ACPT: 939 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD); 940 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM, 941 0); 942 break; 943 case REQ_RJCT: 944 mesh_mpm_send_plink_action(wpa_s, sta, 945 PLINK_CLOSE, reason); 946 break; 947 default: 948 break; 949 } 950 break; 951 case PLINK_OPN_SNT: 952 switch (event) { 953 case OPN_RJCT: 954 case CNF_RJCT: 955 if (!reason) 956 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 957 /* fall-through */ 958 case CLS_ACPT: 959 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 960 if (!reason) 961 reason = WLAN_REASON_MESH_CLOSE_RCVD; 962 eloop_register_timeout( 963 conf->dot11MeshHoldingTimeout / 1000, 964 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 965 plink_timer, wpa_s, sta); 966 mesh_mpm_send_plink_action(wpa_s, sta, 967 PLINK_CLOSE, reason); 968 break; 969 case OPN_ACPT: 970 /* retry timer is left untouched */ 971 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD); 972 mesh_mpm_send_plink_action(wpa_s, sta, 973 PLINK_CONFIRM, 0); 974 break; 975 case CNF_ACPT: 976 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD); 977 eloop_cancel_timeout(plink_timer, wpa_s, sta); 978 eloop_register_timeout( 979 conf->dot11MeshConfirmTimeout / 1000, 980 (conf->dot11MeshConfirmTimeout % 1000) * 1000, 981 plink_timer, wpa_s, sta); 982 break; 983 default: 984 break; 985 } 986 break; 987 case PLINK_OPN_RCVD: 988 switch (event) { 989 case OPN_RJCT: 990 case CNF_RJCT: 991 if (!reason) 992 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 993 /* fall-through */ 994 case CLS_ACPT: 995 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 996 if (!reason) 997 reason = WLAN_REASON_MESH_CLOSE_RCVD; 998 eloop_register_timeout( 999 conf->dot11MeshHoldingTimeout / 1000, 1000 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1001 plink_timer, wpa_s, sta); 1002 sta->mpm_close_reason = reason; 1003 mesh_mpm_send_plink_action(wpa_s, sta, 1004 PLINK_CLOSE, reason); 1005 break; 1006 case OPN_ACPT: 1007 mesh_mpm_send_plink_action(wpa_s, sta, 1008 PLINK_CONFIRM, 0); 1009 break; 1010 case CNF_ACPT: 1011 if (conf->security & MESH_CONF_SEC_AMPE) 1012 mesh_rsn_derive_mtk(wpa_s, sta); 1013 mesh_mpm_plink_estab(wpa_s, sta); 1014 break; 1015 default: 1016 break; 1017 } 1018 break; 1019 case PLINK_CNF_RCVD: 1020 switch (event) { 1021 case OPN_RJCT: 1022 case CNF_RJCT: 1023 if (!reason) 1024 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION; 1025 /* fall-through */ 1026 case CLS_ACPT: 1027 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 1028 if (!reason) 1029 reason = WLAN_REASON_MESH_CLOSE_RCVD; 1030 eloop_register_timeout( 1031 conf->dot11MeshHoldingTimeout / 1000, 1032 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1033 plink_timer, wpa_s, sta); 1034 sta->mpm_close_reason = reason; 1035 mesh_mpm_send_plink_action(wpa_s, sta, 1036 PLINK_CLOSE, reason); 1037 break; 1038 case OPN_ACPT: 1039 if (conf->security & MESH_CONF_SEC_AMPE) 1040 mesh_rsn_derive_mtk(wpa_s, sta); 1041 mesh_mpm_plink_estab(wpa_s, sta); 1042 mesh_mpm_send_plink_action(wpa_s, sta, 1043 PLINK_CONFIRM, 0); 1044 break; 1045 default: 1046 break; 1047 } 1048 break; 1049 case PLINK_ESTAB: 1050 switch (event) { 1051 case OPN_RJCT: 1052 case CNF_RJCT: 1053 case CLS_ACPT: 1054 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING); 1055 if (!reason) 1056 reason = WLAN_REASON_MESH_CLOSE_RCVD; 1057 1058 eloop_register_timeout( 1059 conf->dot11MeshHoldingTimeout / 1000, 1060 (conf->dot11MeshHoldingTimeout % 1000) * 1000, 1061 plink_timer, wpa_s, sta); 1062 sta->mpm_close_reason = reason; 1063 1064 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR 1065 " closed with reason %d", 1066 MAC2STR(sta->addr), reason); 1067 1068 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR, 1069 MAC2STR(sta->addr)); 1070 1071 /* Send D-Bus event */ 1072 wpas_notify_mesh_peer_disconnected(wpa_s, sta->addr, 1073 reason); 1074 1075 hapd->num_plinks--; 1076 1077 mesh_mpm_send_plink_action(wpa_s, sta, 1078 PLINK_CLOSE, reason); 1079 break; 1080 case OPN_ACPT: 1081 mesh_mpm_send_plink_action(wpa_s, sta, 1082 PLINK_CONFIRM, 0); 1083 break; 1084 default: 1085 break; 1086 } 1087 break; 1088 case PLINK_HOLDING: 1089 switch (event) { 1090 case CLS_ACPT: 1091 mesh_mpm_fsm_restart(wpa_s, sta); 1092 break; 1093 case OPN_ACPT: 1094 case CNF_ACPT: 1095 case OPN_RJCT: 1096 case CNF_RJCT: 1097 reason = sta->mpm_close_reason; 1098 mesh_mpm_send_plink_action(wpa_s, sta, 1099 PLINK_CLOSE, reason); 1100 break; 1101 default: 1102 break; 1103 } 1104 break; 1105 default: 1106 wpa_msg(wpa_s, MSG_DEBUG, 1107 "Unsupported MPM event %s for state %s", 1108 mplevent[event], mplstate[sta->plink_state]); 1109 break; 1110 } 1111 } 1112 1113 1114 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s, 1115 const struct ieee80211_mgmt *mgmt, size_t len) 1116 { 1117 u8 action_field; 1118 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0]; 1119 struct mesh_conf *mconf = wpa_s->ifmsh->mconf; 1120 struct sta_info *sta; 1121 u16 plid = 0, llid = 0, aid = 0; 1122 enum plink_event event; 1123 struct ieee802_11_elems elems; 1124 struct mesh_peer_mgmt_ie peer_mgmt_ie; 1125 const u8 *ies; 1126 size_t ie_len; 1127 int ret; 1128 u16 reason = 0; 1129 1130 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED) 1131 return; 1132 1133 action_field = mgmt->u.action.u.slf_prot_action.action; 1134 if (action_field != PLINK_OPEN && 1135 action_field != PLINK_CONFIRM && 1136 action_field != PLINK_CLOSE) 1137 return; 1138 1139 ies = mgmt->u.action.u.slf_prot_action.variable; 1140 ie_len = (const u8 *) mgmt + len - 1141 mgmt->u.action.u.slf_prot_action.variable; 1142 1143 /* at least expect mesh id and peering mgmt */ 1144 if (ie_len < 2 + 2) { 1145 wpa_printf(MSG_DEBUG, 1146 "MPM: Ignore too short action frame %u ie_len %u", 1147 action_field, (unsigned int) ie_len); 1148 return; 1149 } 1150 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field); 1151 1152 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) { 1153 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x", 1154 WPA_GET_LE16(ies)); 1155 ies += 2; /* capability */ 1156 ie_len -= 2; 1157 } 1158 if (action_field == PLINK_CONFIRM) { 1159 aid = WPA_GET_LE16(ies); 1160 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid); 1161 ies += 2; /* aid */ 1162 ie_len -= 2; 1163 } 1164 1165 /* check for mesh peering, mesh id and mesh config IEs */ 1166 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) { 1167 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs"); 1168 return; 1169 } 1170 if (!elems.peer_mgmt) { 1171 wpa_printf(MSG_DEBUG, 1172 "MPM: No Mesh Peering Management element"); 1173 return; 1174 } 1175 if (action_field != PLINK_CLOSE) { 1176 if (!elems.mesh_id || !elems.mesh_config) { 1177 wpa_printf(MSG_DEBUG, 1178 "MPM: No Mesh ID or Mesh Configuration element"); 1179 return; 1180 } 1181 1182 if (!matches_local(wpa_s, &elems)) { 1183 wpa_printf(MSG_DEBUG, 1184 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS"); 1185 return; 1186 } 1187 } 1188 1189 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field, 1190 elems.peer_mgmt, 1191 elems.peer_mgmt_len, 1192 &peer_mgmt_ie); 1193 if (ret) { 1194 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame"); 1195 return; 1196 } 1197 1198 /* the sender's llid is our plid and vice-versa */ 1199 plid = WPA_GET_LE16(peer_mgmt_ie.llid); 1200 if (peer_mgmt_ie.plid) 1201 llid = WPA_GET_LE16(peer_mgmt_ie.plid); 1202 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid); 1203 1204 if (action_field == PLINK_CLOSE) 1205 wpa_printf(MSG_DEBUG, "MPM: close reason=%u", 1206 WPA_GET_LE16(peer_mgmt_ie.reason)); 1207 1208 sta = ap_get_sta(hapd, mgmt->sa); 1209 1210 /* 1211 * If this is an open frame from an unknown STA, and this is an 1212 * open mesh, then go ahead and add the peer before proceeding. 1213 */ 1214 if (!sta && action_field == PLINK_OPEN && 1215 (!(mconf->security & MESH_CONF_SEC_AMPE) || 1216 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL))) 1217 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems); 1218 1219 if (!sta) { 1220 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer"); 1221 return; 1222 } 1223 1224 #ifdef CONFIG_SAE 1225 /* peer is in sae_accepted? */ 1226 if (sta->sae && sta->sae->state != SAE_ACCEPTED) { 1227 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer"); 1228 return; 1229 } 1230 #endif /* CONFIG_SAE */ 1231 1232 if (!sta->my_lid) 1233 mesh_mpm_init_link(wpa_s, sta); 1234 1235 if (mconf->security & MESH_CONF_SEC_AMPE) { 1236 int res; 1237 1238 res = mesh_rsn_process_ampe(wpa_s, sta, &elems, 1239 &mgmt->u.action.category, 1240 peer_mgmt_ie.chosen_pmk, 1241 ies, ie_len); 1242 if (res) { 1243 wpa_printf(MSG_DEBUG, 1244 "MPM: RSN process rejected frame (res=%d)", 1245 res); 1246 if (action_field == PLINK_OPEN && res == -2) { 1247 /* AES-SIV decryption failed */ 1248 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT, 1249 WLAN_REASON_MESH_INVALID_GTK); 1250 } 1251 return; 1252 } 1253 1254 #ifdef CONFIG_OCV 1255 if (action_field == PLINK_OPEN && elems.rsn_ie) { 1256 struct wpa_state_machine *sm = sta->wpa_sm; 1257 struct wpa_ie_data data; 1258 1259 res = wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, 1260 elems.rsn_ie_len + 2, 1261 &data); 1262 if (res) { 1263 wpa_printf(MSG_DEBUG, 1264 "Failed to parse RSN IE (res=%d)", 1265 res); 1266 wpa_hexdump(MSG_DEBUG, "RSN IE", elems.rsn_ie, 1267 elems.rsn_ie_len); 1268 return; 1269 } 1270 1271 wpa_auth_set_ocv(sm, mconf->ocv && 1272 (data.capabilities & 1273 WPA_CAPABILITY_OCVC)); 1274 } 1275 1276 if (action_field != PLINK_CLOSE && 1277 wpa_auth_uses_ocv(sta->wpa_sm)) { 1278 struct wpa_channel_info ci; 1279 int tx_chanwidth; 1280 int tx_seg1_idx; 1281 1282 if (wpa_drv_channel_info(wpa_s, &ci) != 0) { 1283 wpa_printf(MSG_WARNING, 1284 "MPM: Failed to get channel info to validate received OCI in MPM Confirm"); 1285 return; 1286 } 1287 1288 if (get_tx_parameters( 1289 sta, channel_width_to_int(ci.chanwidth), 1290 ci.seg1_idx, &tx_chanwidth, 1291 &tx_seg1_idx) < 0) 1292 return; 1293 1294 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, 1295 tx_chanwidth, tx_seg1_idx) != 1296 OCI_SUCCESS) { 1297 wpa_printf(MSG_WARNING, "MPM: OCV failed: %s", 1298 ocv_errorstr); 1299 return; 1300 } 1301 } 1302 #endif /* CONFIG_OCV */ 1303 } 1304 1305 if (sta->plink_state == PLINK_BLOCKED) { 1306 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED"); 1307 return; 1308 } 1309 1310 /* Now we will figure out the appropriate event... */ 1311 switch (action_field) { 1312 case PLINK_OPEN: 1313 if (plink_free_count(hapd) == 0) { 1314 event = REQ_RJCT; 1315 reason = WLAN_REASON_MESH_MAX_PEERS; 1316 wpa_printf(MSG_INFO, 1317 "MPM: Peer link num over quota(%d)", 1318 hapd->max_plinks); 1319 } else if (sta->peer_lid && sta->peer_lid != plid) { 1320 wpa_printf(MSG_DEBUG, 1321 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1322 sta->peer_lid, plid); 1323 return; /* no FSM event */ 1324 } else { 1325 sta->peer_lid = plid; 1326 event = OPN_ACPT; 1327 } 1328 break; 1329 case PLINK_CONFIRM: 1330 if (plink_free_count(hapd) == 0) { 1331 event = REQ_RJCT; 1332 reason = WLAN_REASON_MESH_MAX_PEERS; 1333 wpa_printf(MSG_INFO, 1334 "MPM: Peer link num over quota(%d)", 1335 hapd->max_plinks); 1336 } else if (sta->my_lid != llid || 1337 (sta->peer_lid && sta->peer_lid != plid)) { 1338 wpa_printf(MSG_DEBUG, 1339 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x", 1340 sta->my_lid, llid, sta->peer_lid, plid); 1341 return; /* no FSM event */ 1342 } else { 1343 if (!sta->peer_lid) 1344 sta->peer_lid = plid; 1345 sta->peer_aid = aid; 1346 event = CNF_ACPT; 1347 } 1348 break; 1349 case PLINK_CLOSE: 1350 if (sta->plink_state == PLINK_ESTAB) 1351 /* Do not check for llid or plid. This does not 1352 * follow the standard but since multiple plinks 1353 * per cand are not supported, it is necessary in 1354 * order to avoid a livelock when MP A sees an 1355 * establish peer link to MP B but MP B does not 1356 * see it. This can be caused by a timeout in 1357 * B's peer link establishment or B being 1358 * restarted. 1359 */ 1360 event = CLS_ACPT; 1361 else if (sta->peer_lid != plid) { 1362 wpa_printf(MSG_DEBUG, 1363 "MPM: peer_lid mismatch: 0x%x != 0x%x", 1364 sta->peer_lid, plid); 1365 return; /* no FSM event */ 1366 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) { 1367 wpa_printf(MSG_DEBUG, 1368 "MPM: my_lid mismatch: 0x%x != 0x%x", 1369 sta->my_lid, llid); 1370 return; /* no FSM event */ 1371 } else { 1372 event = CLS_ACPT; 1373 } 1374 break; 1375 default: 1376 /* 1377 * This cannot be hit due to the action_field check above, but 1378 * compilers may not be able to figure that out and can warn 1379 * about uninitialized event below. 1380 */ 1381 return; 1382 } 1383 mesh_mpm_fsm(wpa_s, sta, event, reason); 1384 } 1385 1386 1387 /* called by ap_free_sta */ 1388 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta) 1389 { 1390 if (sta->plink_state == PLINK_ESTAB) 1391 hapd->num_plinks--; 1392 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta); 1393 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta); 1394 } 1395