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