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HS 2.0: Skip credential without EAP method for roaming consortium match
[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 "common/hw_features_common.h"
15 #include "common/ocv.h"
16 #include "ap/hostapd.h"
17 #include "ap/sta_info.h"
18 #include "ap/ieee802_11.h"
19 #include "ap/wpa_auth.h"
20 #include "wpa_supplicant_i.h"
21 #include "driver_i.h"
22 #include "mesh_mpm.h"
23 #include "mesh_rsn.h"
24 #include "notify.h"
25
26 struct mesh_peer_mgmt_ie {
27 const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */
28 const u8 *llid; /* Local Link ID (2 octets) */
29 const u8 *plid; /* Peer Link ID (conditional, 2 octets) */
30 const u8 *reason; /* Reason Code (conditional, 2 octets) */
31 const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */
32 };
33
34 static void plink_timer(void *eloop_ctx, void *user_data);
35
36
37 enum plink_event {
38 PLINK_UNDEFINED,
39 OPN_ACPT,
40 OPN_RJCT,
41 CNF_ACPT,
42 CNF_RJCT,
43 CLS_ACPT,
44 REQ_RJCT
45 };
46
47 static const char * const mplstate[] = {
48 [0] = "UNINITIALIZED",
49 [PLINK_IDLE] = "IDLE",
50 [PLINK_OPN_SNT] = "OPN_SNT",
51 [PLINK_OPN_RCVD] = "OPN_RCVD",
52 [PLINK_CNF_RCVD] = "CNF_RCVD",
53 [PLINK_ESTAB] = "ESTAB",
54 [PLINK_HOLDING] = "HOLDING",
55 [PLINK_BLOCKED] = "BLOCKED"
56 };
57
58 static const char * const mplevent[] = {
59 [PLINK_UNDEFINED] = "UNDEFINED",
60 [OPN_ACPT] = "OPN_ACPT",
61 [OPN_RJCT] = "OPN_RJCT",
62 [CNF_ACPT] = "CNF_ACPT",
63 [CNF_RJCT] = "CNF_RJCT",
64 [CLS_ACPT] = "CLS_ACPT",
65 [REQ_RJCT] = "REQ_RJCT",
66 };
67
68
69 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s,
70 u8 action_field,
71 const u8 *ie, size_t len,
72 struct mesh_peer_mgmt_ie *mpm_ie)
73 {
74 os_memset(mpm_ie, 0, sizeof(*mpm_ie));
75
76 /* Remove optional Chosen PMK field at end */
77 if (len >= SAE_PMKID_LEN) {
78 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN;
79 len -= SAE_PMKID_LEN;
80 }
81
82 if ((action_field == PLINK_OPEN && len != 4) ||
83 (action_field == PLINK_CONFIRM && len != 6) ||
84 (action_field == PLINK_CLOSE && len != 6 && len != 8)) {
85 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie");
86 return -1;
87 }
88
89 /* required fields */
90 if (len < 4)
91 return -1;
92 mpm_ie->proto_id = ie;
93 mpm_ie->llid = ie + 2;
94 ie += 4;
95 len -= 4;
96
97 /* close reason is always present at end for close */
98 if (action_field == PLINK_CLOSE) {
99 if (len < 2)
100 return -1;
101 mpm_ie->reason = ie + len - 2;
102 len -= 2;
103 }
104
105 /* Peer Link ID, present for confirm, and possibly close */
106 if (len >= 2)
107 mpm_ie->plid = ie;
108
109 return 0;
110 }
111
112
113 static int plink_free_count(struct hostapd_data *hapd)
114 {
115 if (hapd->max_plinks > hapd->num_plinks)
116 return hapd->max_plinks - hapd->num_plinks;
117 return 0;
118 }
119
120
121 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s,
122 struct sta_info *sta,
123 struct ieee802_11_elems *elems)
124 {
125 if (!elems->supp_rates) {
126 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR,
127 MAC2STR(sta->addr));
128 return WLAN_STATUS_UNSPECIFIED_FAILURE;
129 }
130
131 if (elems->supp_rates_len + elems->ext_supp_rates_len >
132 sizeof(sta->supported_rates)) {
133 wpa_msg(wpa_s, MSG_ERROR,
134 "Invalid supported rates element length " MACSTR
135 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len,
136 elems->ext_supp_rates_len);
137 return WLAN_STATUS_UNSPECIFIED_FAILURE;
138 }
139
140 sta->supported_rates_len = merge_byte_arrays(
141 sta->supported_rates, sizeof(sta->supported_rates),
142 elems->supp_rates, elems->supp_rates_len,
143 elems->ext_supp_rates, elems->ext_supp_rates_len);
144
145 return WLAN_STATUS_SUCCESS;
146 }
147
148
149 /* return true if elems from a neighbor match this MBSS */
150 static Boolean matches_local(struct wpa_supplicant *wpa_s,
151 struct ieee802_11_elems *elems)
152 {
153 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
154
155 if (elems->mesh_config_len < 5)
156 return FALSE;
157
158 return (mconf->meshid_len == elems->mesh_id_len &&
159 os_memcmp(mconf->meshid, elems->mesh_id,
160 elems->mesh_id_len) == 0 &&
161 mconf->mesh_pp_id == elems->mesh_config[0] &&
162 mconf->mesh_pm_id == elems->mesh_config[1] &&
163 mconf->mesh_cc_id == elems->mesh_config[2] &&
164 mconf->mesh_sp_id == elems->mesh_config[3] &&
165 mconf->mesh_auth_id == elems->mesh_config[4]);
166 }
167
168
169 /* check if local link id is already used with another peer */
170 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid)
171 {
172 struct sta_info *sta;
173 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
174
175 for (sta = hapd->sta_list; sta; sta = sta->next) {
176 if (sta->my_lid == llid)
177 return TRUE;
178 }
179
180 return FALSE;
181 }
182
183
184 /* generate an llid for a link and set to initial state */
185 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s,
186 struct sta_info *sta)
187 {
188 u16 llid;
189
190 do {
191 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0)
192 llid = 0; /* continue */
193 } while (!llid || llid_in_use(wpa_s, llid));
194
195 sta->my_lid = llid;
196 sta->peer_lid = 0;
197 sta->peer_aid = 0;
198
199 /*
200 * We do not use wpa_mesh_set_plink_state() here because there is no
201 * entry in kernel yet.
202 */
203 sta->plink_state = PLINK_IDLE;
204 }
205
206
207 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s,
208 struct sta_info *sta,
209 enum plink_action_field type,
210 u16 close_reason)
211 {
212 struct wpabuf *buf;
213 struct hostapd_iface *ifmsh = wpa_s->ifmsh;
214 struct hostapd_data *bss = ifmsh->bss[0];
215 struct mesh_conf *conf = ifmsh->mconf;
216 u8 supp_rates[2 + 2 + 32];
217 u8 *pos, *cat;
218 u8 ie_len, add_plid = 0;
219 int ret;
220 int ampe = conf->security & MESH_CONF_SEC_AMPE;
221 size_t buf_len;
222
223 if (!sta)
224 return;
225
226 buf_len = 2 + /* Category and Action */
227 2 + /* capability info */
228 2 + /* AID */
229 2 + 8 + /* supported rates */
230 2 + (32 - 8) +
231 2 + 32 + /* mesh ID */
232 2 + 7 + /* mesh config */
233 2 + 24 + /* peering management */
234 2 + 96 + /* AMPE */
235 2 + 16; /* MIC */
236 #ifdef CONFIG_IEEE80211N
237 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
238 buf_len += 2 + 26 + /* HT capabilities */
239 2 + 22; /* HT operation */
240 }
241 #endif /* CONFIG_IEEE80211N */
242 #ifdef CONFIG_IEEE80211AC
243 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
244 buf_len += 2 + 12 + /* VHT Capabilities */
245 2 + 5; /* VHT Operation */
246 }
247 #endif /* CONFIG_IEEE80211AC */
248 if (type != PLINK_CLOSE)
249 buf_len += conf->rsn_ie_len; /* RSN IE */
250 #ifdef CONFIG_OCV
251 /* OCI is included even when the other STA doesn't support OCV */
252 if (type != PLINK_CLOSE && conf->ocv)
253 buf_len += OCV_OCI_EXTENDED_LEN;
254 #endif /* CONFIG_OCV */
255
256 buf = wpabuf_alloc(buf_len);
257 if (!buf)
258 return;
259
260 cat = wpabuf_mhead_u8(buf);
261 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED);
262 wpabuf_put_u8(buf, type);
263
264 if (type != PLINK_CLOSE) {
265 u8 info;
266
267 /* capability info */
268 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0);
269
270 /* aid */
271 if (type == PLINK_CONFIRM)
272 wpabuf_put_le16(buf, sta->aid);
273
274 /* IE: supp + ext. supp rates */
275 pos = hostapd_eid_supp_rates(bss, supp_rates);
276 pos = hostapd_eid_ext_supp_rates(bss, pos);
277 wpabuf_put_data(buf, supp_rates, pos - supp_rates);
278
279 /* IE: RSN IE */
280 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len);
281
282 /* IE: Mesh ID */
283 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
284 wpabuf_put_u8(buf, conf->meshid_len);
285 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
286
287 /* IE: mesh conf */
288 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG);
289 wpabuf_put_u8(buf, 7);
290 wpabuf_put_u8(buf, conf->mesh_pp_id);
291 wpabuf_put_u8(buf, conf->mesh_pm_id);
292 wpabuf_put_u8(buf, conf->mesh_cc_id);
293 wpabuf_put_u8(buf, conf->mesh_sp_id);
294 wpabuf_put_u8(buf, conf->mesh_auth_id);
295 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1;
296 /* TODO: Add Connected to Mesh Gate/AS subfields */
297 wpabuf_put_u8(buf, info);
298 /* always forwarding & accepting plinks for now */
299 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER |
300 MESH_CAP_FORWARDING);
301 } else { /* Peer closing frame */
302 /* IE: Mesh ID */
303 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
304 wpabuf_put_u8(buf, conf->meshid_len);
305 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
306 }
307
308 /* IE: Mesh Peering Management element */
309 ie_len = 4;
310 if (ampe)
311 ie_len += PMKID_LEN;
312 switch (type) {
313 case PLINK_OPEN:
314 break;
315 case PLINK_CONFIRM:
316 ie_len += 2;
317 add_plid = 1;
318 break;
319 case PLINK_CLOSE:
320 ie_len += 2;
321 add_plid = 1;
322 ie_len += 2; /* reason code */
323 break;
324 }
325
326 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT);
327 wpabuf_put_u8(buf, ie_len);
328 /* peering protocol */
329 if (ampe)
330 wpabuf_put_le16(buf, 1);
331 else
332 wpabuf_put_le16(buf, 0);
333 wpabuf_put_le16(buf, sta->my_lid);
334 if (add_plid)
335 wpabuf_put_le16(buf, sta->peer_lid);
336 if (type == PLINK_CLOSE)
337 wpabuf_put_le16(buf, close_reason);
338 if (ampe) {
339 if (sta->sae == NULL) {
340 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session");
341 goto fail;
342 }
343 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta,
344 wpabuf_put(buf, PMKID_LEN));
345 }
346
347 #ifdef CONFIG_IEEE80211N
348 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
349 u8 ht_capa_oper[2 + 26 + 2 + 22];
350
351 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper);
352 pos = hostapd_eid_ht_operation(bss, pos);
353 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper);
354 }
355 #endif /* CONFIG_IEEE80211N */
356 #ifdef CONFIG_IEEE80211AC
357 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
358 u8 vht_capa_oper[2 + 12 + 2 + 5];
359
360 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0);
361 pos = hostapd_eid_vht_operation(bss, pos);
362 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper);
363 }
364 #endif /* CONFIG_IEEE80211AC */
365
366 #ifdef CONFIG_OCV
367 if (type != PLINK_CLOSE && conf->ocv) {
368 struct wpa_channel_info ci;
369
370 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
371 wpa_printf(MSG_WARNING,
372 "Mesh MPM: Failed to get channel info for OCI element");
373 goto fail;
374 }
375
376 pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN);
377 if (ocv_insert_extended_oci(&ci, pos) < 0)
378 goto fail;
379 }
380 #endif /* CONFIG_OCV */
381
382 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) {
383 wpa_msg(wpa_s, MSG_INFO,
384 "Mesh MPM: failed to add AMPE and MIC IE");
385 goto fail;
386 }
387
388 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to "
389 MACSTR " (my_lid=0x%x peer_lid=0x%x)",
390 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid);
391 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0,
392 sta->addr, wpa_s->own_addr, wpa_s->own_addr,
393 wpabuf_head(buf), wpabuf_len(buf), 0);
394 if (ret < 0)
395 wpa_msg(wpa_s, MSG_INFO,
396 "Mesh MPM: failed to send peering frame");
397
398 fail:
399 wpabuf_free(buf);
400 }
401
402
403 /* configure peering state in ours and driver's station entry */
404 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s,
405 struct sta_info *sta,
406 enum mesh_plink_state state)
407 {
408 struct hostapd_sta_add_params params;
409 int ret;
410
411 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s",
412 MAC2STR(sta->addr), mplstate[sta->plink_state],
413 mplstate[state]);
414 sta->plink_state = state;
415
416 os_memset(&params, 0, sizeof(params));
417 params.addr = sta->addr;
418 params.plink_state = state;
419 params.peer_aid = sta->peer_aid;
420 params.set = 1;
421
422 ret = wpa_drv_sta_add(wpa_s, &params);
423 if (ret) {
424 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR
425 ": %d", MAC2STR(sta->addr), ret);
426 }
427 }
428
429
430 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s,
431 struct sta_info *sta)
432 {
433 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
434
435 eloop_cancel_timeout(plink_timer, wpa_s, sta);
436
437 ap_free_sta(hapd, sta);
438 }
439
440
441 static void plink_timer(void *eloop_ctx, void *user_data)
442 {
443 struct wpa_supplicant *wpa_s = eloop_ctx;
444 struct sta_info *sta = user_data;
445 u16 reason = 0;
446 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
447 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
448
449 switch (sta->plink_state) {
450 case PLINK_OPN_RCVD:
451 case PLINK_OPN_SNT:
452 /* retry timer */
453 if (sta->mpm_retries < conf->dot11MeshMaxRetries) {
454 eloop_register_timeout(
455 conf->dot11MeshRetryTimeout / 1000,
456 (conf->dot11MeshRetryTimeout % 1000) * 1000,
457 plink_timer, wpa_s, sta);
458 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
459 sta->mpm_retries++;
460 break;
461 }
462 reason = WLAN_REASON_MESH_MAX_RETRIES;
463 /* fall through */
464
465 case PLINK_CNF_RCVD:
466 /* confirm timer */
467 if (!reason)
468 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT;
469 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
470 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000,
471 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
472 plink_timer, wpa_s, sta);
473 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
474 break;
475 case PLINK_HOLDING:
476 /* holding timer */
477
478 if (sta->mesh_sae_pmksa_caching) {
479 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR
480 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it",
481 MAC2STR(sta->addr));
482 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
483 }
484 mesh_mpm_fsm_restart(wpa_s, sta);
485 break;
486 default:
487 break;
488 }
489 }
490
491
492 /* initiate peering with station */
493 static void
494 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta,
495 enum mesh_plink_state next_state)
496 {
497 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
498
499 eloop_cancel_timeout(plink_timer, wpa_s, sta);
500 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000,
501 (conf->dot11MeshRetryTimeout % 1000) * 1000,
502 plink_timer, wpa_s, sta);
503 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
504 wpa_mesh_set_plink_state(wpa_s, sta, next_state);
505 }
506
507
508 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta,
509 void *ctx)
510 {
511 struct wpa_supplicant *wpa_s = ctx;
512 int reason = WLAN_REASON_MESH_PEERING_CANCELLED;
513
514 if (sta) {
515 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
516 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
517 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR,
518 MAC2STR(sta->addr));
519 eloop_cancel_timeout(plink_timer, wpa_s, sta);
520 return 0;
521 }
522
523 return 1;
524 }
525
526
527 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
528 {
529 struct hostapd_data *hapd;
530 struct sta_info *sta;
531
532 if (!wpa_s->ifmsh) {
533 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet");
534 return -1;
535 }
536
537 hapd = wpa_s->ifmsh->bss[0];
538 sta = ap_get_sta(hapd, addr);
539 if (!sta) {
540 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer");
541 return -1;
542 }
543
544 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1;
545 }
546
547
548 static void peer_add_timer(void *eloop_ctx, void *user_data)
549 {
550 struct wpa_supplicant *wpa_s = eloop_ctx;
551 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
552
553 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN);
554 }
555
556
557 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
558 int duration)
559 {
560 struct wpa_ssid *ssid = wpa_s->current_ssid;
561 struct hostapd_data *hapd;
562 struct sta_info *sta;
563 struct mesh_conf *conf;
564
565 if (!wpa_s->ifmsh) {
566 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet");
567 return -1;
568 }
569
570 if (!ssid || !ssid->no_auto_peer) {
571 wpa_msg(wpa_s, MSG_INFO,
572 "This command is available only with no_auto_peer mesh network");
573 return -1;
574 }
575
576 hapd = wpa_s->ifmsh->bss[0];
577 conf = wpa_s->ifmsh->mconf;
578
579 sta = ap_get_sta(hapd, addr);
580 if (!sta) {
581 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer");
582 return -1;
583 }
584
585 if ((PLINK_OPN_SNT <= sta->plink_state &&
586 sta->plink_state <= PLINK_ESTAB) ||
587 (sta->sae && sta->sae->state > SAE_NOTHING)) {
588 wpa_msg(wpa_s, MSG_INFO,
589 "Specified peer is connecting/connected");
590 return -1;
591 }
592
593 if (conf->security == MESH_CONF_SEC_NONE) {
594 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
595 } else {
596 mesh_rsn_auth_sae_sta(wpa_s, sta);
597 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN);
598 eloop_register_timeout(duration == -1 ? 10 : duration, 0,
599 peer_add_timer, wpa_s, NULL);
600 }
601
602 return 0;
603 }
604
605
606 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh)
607 {
608 struct hostapd_data *hapd = ifmsh->bss[0];
609
610 /* notify peers we're leaving */
611 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s);
612
613 hapd->num_plinks = 0;
614 hostapd_free_stas(hapd);
615 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
616 }
617
618
619 /* for mesh_rsn to indicate this peer has completed authentication, and we're
620 * ready to start AMPE */
621 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
622 {
623 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
624 struct hostapd_sta_add_params params;
625 struct sta_info *sta;
626 int ret;
627
628 sta = ap_get_sta(data, addr);
629 if (!sta) {
630 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer");
631 return;
632 }
633
634 /* TODO: Should do nothing if this STA is already authenticated, but
635 * the AP code already sets this flag. */
636 sta->flags |= WLAN_STA_AUTH;
637
638 mesh_rsn_init_ampe_sta(wpa_s, sta);
639
640 os_memset(&params, 0, sizeof(params));
641 params.addr = sta->addr;
642 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED;
643 params.set = 1;
644
645 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR,
646 MAC2STR(sta->addr));
647 ret = wpa_drv_sta_add(wpa_s, &params);
648 if (ret) {
649 wpa_msg(wpa_s, MSG_ERROR,
650 "Driver failed to set " MACSTR ": %d",
651 MAC2STR(sta->addr), ret);
652 }
653
654 if (!sta->my_lid)
655 mesh_mpm_init_link(wpa_s, sta);
656
657 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
658 }
659
660 /*
661 * Initialize a sta_info structure for a peer and upload it into the driver
662 * in preparation for beginning authentication or peering. This is done when a
663 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is
664 * received from the peer for the first time.
665 */
666 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s,
667 const u8 *addr,
668 struct ieee802_11_elems *elems)
669 {
670 struct hostapd_sta_add_params params;
671 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
672 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
673 struct sta_info *sta;
674 #ifdef CONFIG_IEEE80211N
675 struct ieee80211_ht_operation *oper;
676 #endif /* CONFIG_IEEE80211N */
677 int ret;
678
679 if (elems->mesh_config_len >= 7 &&
680 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) {
681 wpa_msg(wpa_s, MSG_DEBUG,
682 "mesh: Ignore a crowded peer " MACSTR,
683 MAC2STR(addr));
684 return NULL;
685 }
686
687 sta = ap_get_sta(data, addr);
688 if (!sta) {
689 sta = ap_sta_add(data, addr);
690 if (!sta)
691 return NULL;
692 }
693
694 /* Set WMM by default since Mesh STAs are QoS STAs */
695 sta->flags |= WLAN_STA_WMM;
696
697 /* initialize sta */
698 if (copy_supp_rates(wpa_s, sta, elems)) {
699 ap_free_sta(data, sta);
700 return NULL;
701 }
702
703 if (!sta->my_lid)
704 mesh_mpm_init_link(wpa_s, sta);
705
706 #ifdef CONFIG_IEEE80211N
707 copy_sta_ht_capab(data, sta, elems->ht_capabilities);
708
709 oper = (struct ieee80211_ht_operation *) elems->ht_operation;
710 if (oper &&
711 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) &&
712 sta->ht_capabilities) {
713 wpa_msg(wpa_s, MSG_DEBUG, MACSTR
714 " does not support 40 MHz bandwidth",
715 MAC2STR(sta->addr));
716 set_disable_ht40(sta->ht_capabilities, 1);
717 }
718
719 update_ht_state(data, sta);
720 #endif /* CONFIG_IEEE80211N */
721
722 #ifdef CONFIG_IEEE80211AC
723 copy_sta_vht_capab(data, sta, elems->vht_capabilities);
724 copy_sta_vht_oper(data, sta, elems->vht_operation);
725 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif);
726 #endif /* CONFIG_IEEE80211AC */
727
728 if (hostapd_get_aid(data, sta) < 0) {
729 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available");
730 ap_free_sta(data, sta);
731 return NULL;
732 }
733
734 /* insert into driver */
735 os_memset(&params, 0, sizeof(params));
736 params.supp_rates = sta->supported_rates;
737 params.supp_rates_len = sta->supported_rates_len;
738 params.addr = addr;
739 params.plink_state = sta->plink_state;
740 params.aid = sta->aid;
741 params.peer_aid = sta->peer_aid;
742 params.listen_interval = 100;
743 params.ht_capabilities = sta->ht_capabilities;
744 params.vht_capabilities = sta->vht_capabilities;
745 params.flags |= WPA_STA_WMM;
746 params.flags_mask |= WPA_STA_AUTHENTICATED;
747 if (conf->security == MESH_CONF_SEC_NONE) {
748 params.flags |= WPA_STA_AUTHORIZED;
749 params.flags |= WPA_STA_AUTHENTICATED;
750 } else {
751 sta->flags |= WLAN_STA_MFP;
752 params.flags |= WPA_STA_MFP;
753 }
754
755 ret = wpa_drv_sta_add(wpa_s, &params);
756 if (ret) {
757 wpa_msg(wpa_s, MSG_ERROR,
758 "Driver failed to insert " MACSTR ": %d",
759 MAC2STR(addr), ret);
760 ap_free_sta(data, sta);
761 return NULL;
762 }
763
764 return sta;
765 }
766
767
768 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
769 struct ieee802_11_elems *elems)
770 {
771 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
772 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
773 struct sta_info *sta;
774 struct wpa_ssid *ssid = wpa_s->current_ssid;
775
776 sta = mesh_mpm_add_peer(wpa_s, addr, elems);
777 if (!sta)
778 return;
779
780 if (ssid && ssid->no_auto_peer &&
781 (is_zero_ether_addr(data->mesh_required_peer) ||
782 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) {
783 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with "
784 MACSTR " because of no_auto_peer", MAC2STR(addr));
785 if (data->mesh_pending_auth) {
786 struct os_reltime age;
787 const struct ieee80211_mgmt *mgmt;
788 struct hostapd_frame_info fi;
789
790 mgmt = wpabuf_head(data->mesh_pending_auth);
791 os_reltime_age(&data->mesh_pending_auth_time, &age);
792 if (age.sec < 2 &&
793 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) {
794 wpa_printf(MSG_DEBUG,
795 "mesh: Process pending Authentication frame from %u.%06u seconds ago",
796 (unsigned int) age.sec,
797 (unsigned int) age.usec);
798 os_memset(&fi, 0, sizeof(fi));
799 ieee802_11_mgmt(
800 data,
801 wpabuf_head(data->mesh_pending_auth),
802 wpabuf_len(data->mesh_pending_auth),
803 &fi);
804 }
805 wpabuf_free(data->mesh_pending_auth);
806 data->mesh_pending_auth = NULL;
807 }
808 return;
809 }
810
811 if (conf->security == MESH_CONF_SEC_NONE) {
812 if (sta->plink_state < PLINK_OPN_SNT ||
813 sta->plink_state > PLINK_ESTAB)
814 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
815 } else {
816 mesh_rsn_auth_sae_sta(wpa_s, sta);
817 }
818 }
819
820
821 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt)
822 {
823 struct hostapd_frame_info fi;
824
825 os_memset(&fi, 0, sizeof(fi));
826 fi.datarate = rx_mgmt->datarate;
827 fi.ssi_signal = rx_mgmt->ssi_signal;
828 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame,
829 rx_mgmt->frame_len, &fi);
830 }
831
832
833 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
834 struct sta_info *sta)
835 {
836 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
837 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
838 u8 seq[6] = {};
839
840 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established",
841 MAC2STR(sta->addr));
842
843 if (conf->security & MESH_CONF_SEC_AMPE) {
844 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len);
845 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher),
846 sta->addr, 0, 0, seq, sizeof(seq),
847 sta->mtk, sta->mtk_len);
848
849 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC",
850 sta->mgtk_rsc, sizeof(sta->mgtk_rsc));
851 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK",
852 sta->mgtk, sta->mgtk_len);
853 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher),
854 sta->addr, sta->mgtk_key_id, 0,
855 sta->mgtk_rsc, sizeof(sta->mgtk_rsc),
856 sta->mgtk, sta->mgtk_len);
857
858 if (sta->igtk_len) {
859 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC",
860 sta->igtk_rsc, sizeof(sta->igtk_rsc));
861 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK",
862 sta->igtk, sta->igtk_len);
863 wpa_drv_set_key(
864 wpa_s,
865 wpa_cipher_to_alg(conf->mgmt_group_cipher),
866 sta->addr, sta->igtk_key_id, 0,
867 sta->igtk_rsc, sizeof(sta->igtk_rsc),
868 sta->igtk, sta->igtk_len);
869 }
870 }
871
872 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);
873 hapd->num_plinks++;
874
875 sta->flags |= WLAN_STA_ASSOC;
876 sta->mesh_sae_pmksa_caching = 0;
877
878 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
879 peer_add_timer(wpa_s, NULL);
880 eloop_cancel_timeout(plink_timer, wpa_s, sta);
881
882 /* Send ctrl event */
883 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR,
884 MAC2STR(sta->addr));
885
886 /* Send D-Bus event */
887 wpas_notify_mesh_peer_connected(wpa_s, sta->addr);
888 }
889
890
891 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
892 enum plink_event event, u16 reason)
893 {
894 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
895 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
896
897 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s",
898 MAC2STR(sta->addr), mplstate[sta->plink_state],
899 mplevent[event]);
900
901 switch (sta->plink_state) {
902 case PLINK_IDLE:
903 switch (event) {
904 case CLS_ACPT:
905 mesh_mpm_fsm_restart(wpa_s, sta);
906 break;
907 case OPN_ACPT:
908 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD);
909 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM,
910 0);
911 break;
912 case REQ_RJCT:
913 mesh_mpm_send_plink_action(wpa_s, sta,
914 PLINK_CLOSE, reason);
915 break;
916 default:
917 break;
918 }
919 break;
920 case PLINK_OPN_SNT:
921 switch (event) {
922 case OPN_RJCT:
923 case CNF_RJCT:
924 if (!reason)
925 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
926 /* fall-through */
927 case CLS_ACPT:
928 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
929 if (!reason)
930 reason = WLAN_REASON_MESH_CLOSE_RCVD;
931 eloop_register_timeout(
932 conf->dot11MeshHoldingTimeout / 1000,
933 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
934 plink_timer, wpa_s, sta);
935 mesh_mpm_send_plink_action(wpa_s, sta,
936 PLINK_CLOSE, reason);
937 break;
938 case OPN_ACPT:
939 /* retry timer is left untouched */
940 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD);
941 mesh_mpm_send_plink_action(wpa_s, sta,
942 PLINK_CONFIRM, 0);
943 break;
944 case CNF_ACPT:
945 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
946 eloop_cancel_timeout(plink_timer, wpa_s, sta);
947 eloop_register_timeout(
948 conf->dot11MeshConfirmTimeout / 1000,
949 (conf->dot11MeshConfirmTimeout % 1000) * 1000,
950 plink_timer, wpa_s, sta);
951 break;
952 default:
953 break;
954 }
955 break;
956 case PLINK_OPN_RCVD:
957 switch (event) {
958 case OPN_RJCT:
959 case CNF_RJCT:
960 if (!reason)
961 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
962 /* fall-through */
963 case CLS_ACPT:
964 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
965 if (!reason)
966 reason = WLAN_REASON_MESH_CLOSE_RCVD;
967 eloop_register_timeout(
968 conf->dot11MeshHoldingTimeout / 1000,
969 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
970 plink_timer, wpa_s, sta);
971 sta->mpm_close_reason = reason;
972 mesh_mpm_send_plink_action(wpa_s, sta,
973 PLINK_CLOSE, reason);
974 break;
975 case OPN_ACPT:
976 mesh_mpm_send_plink_action(wpa_s, sta,
977 PLINK_CONFIRM, 0);
978 break;
979 case CNF_ACPT:
980 if (conf->security & MESH_CONF_SEC_AMPE)
981 mesh_rsn_derive_mtk(wpa_s, sta);
982 mesh_mpm_plink_estab(wpa_s, sta);
983 break;
984 default:
985 break;
986 }
987 break;
988 case PLINK_CNF_RCVD:
989 switch (event) {
990 case OPN_RJCT:
991 case CNF_RJCT:
992 if (!reason)
993 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
994 /* fall-through */
995 case CLS_ACPT:
996 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
997 if (!reason)
998 reason = WLAN_REASON_MESH_CLOSE_RCVD;
999 eloop_register_timeout(
1000 conf->dot11MeshHoldingTimeout / 1000,
1001 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
1002 plink_timer, wpa_s, sta);
1003 sta->mpm_close_reason = reason;
1004 mesh_mpm_send_plink_action(wpa_s, sta,
1005 PLINK_CLOSE, reason);
1006 break;
1007 case OPN_ACPT:
1008 if (conf->security & MESH_CONF_SEC_AMPE)
1009 mesh_rsn_derive_mtk(wpa_s, sta);
1010 mesh_mpm_plink_estab(wpa_s, sta);
1011 mesh_mpm_send_plink_action(wpa_s, sta,
1012 PLINK_CONFIRM, 0);
1013 break;
1014 default:
1015 break;
1016 }
1017 break;
1018 case PLINK_ESTAB:
1019 switch (event) {
1020 case OPN_RJCT:
1021 case CNF_RJCT:
1022 case CLS_ACPT:
1023 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
1024 if (!reason)
1025 reason = WLAN_REASON_MESH_CLOSE_RCVD;
1026
1027 eloop_register_timeout(
1028 conf->dot11MeshHoldingTimeout / 1000,
1029 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
1030 plink_timer, wpa_s, sta);
1031 sta->mpm_close_reason = reason;
1032
1033 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR
1034 " closed with reason %d",
1035 MAC2STR(sta->addr), reason);
1036
1037 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR,
1038 MAC2STR(sta->addr));
1039
1040 /* Send D-Bus event */
1041 wpas_notify_mesh_peer_disconnected(wpa_s, sta->addr,
1042 reason);
1043
1044 hapd->num_plinks--;
1045
1046 mesh_mpm_send_plink_action(wpa_s, sta,
1047 PLINK_CLOSE, reason);
1048 break;
1049 case OPN_ACPT:
1050 mesh_mpm_send_plink_action(wpa_s, sta,
1051 PLINK_CONFIRM, 0);
1052 break;
1053 default:
1054 break;
1055 }
1056 break;
1057 case PLINK_HOLDING:
1058 switch (event) {
1059 case CLS_ACPT:
1060 mesh_mpm_fsm_restart(wpa_s, sta);
1061 break;
1062 case OPN_ACPT:
1063 case CNF_ACPT:
1064 case OPN_RJCT:
1065 case CNF_RJCT:
1066 reason = sta->mpm_close_reason;
1067 mesh_mpm_send_plink_action(wpa_s, sta,
1068 PLINK_CLOSE, reason);
1069 break;
1070 default:
1071 break;
1072 }
1073 break;
1074 default:
1075 wpa_msg(wpa_s, MSG_DEBUG,
1076 "Unsupported MPM event %s for state %s",
1077 mplevent[event], mplstate[sta->plink_state]);
1078 break;
1079 }
1080 }
1081
1082
1083 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s,
1084 const struct ieee80211_mgmt *mgmt, size_t len)
1085 {
1086 u8 action_field;
1087 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
1088 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
1089 struct sta_info *sta;
1090 u16 plid = 0, llid = 0, aid = 0;
1091 enum plink_event event;
1092 struct ieee802_11_elems elems;
1093 struct mesh_peer_mgmt_ie peer_mgmt_ie;
1094 const u8 *ies;
1095 size_t ie_len;
1096 int ret;
1097 u16 reason = 0;
1098
1099 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED)
1100 return;
1101
1102 action_field = mgmt->u.action.u.slf_prot_action.action;
1103 if (action_field != PLINK_OPEN &&
1104 action_field != PLINK_CONFIRM &&
1105 action_field != PLINK_CLOSE)
1106 return;
1107
1108 ies = mgmt->u.action.u.slf_prot_action.variable;
1109 ie_len = (const u8 *) mgmt + len -
1110 mgmt->u.action.u.slf_prot_action.variable;
1111
1112 /* at least expect mesh id and peering mgmt */
1113 if (ie_len < 2 + 2) {
1114 wpa_printf(MSG_DEBUG,
1115 "MPM: Ignore too short action frame %u ie_len %u",
1116 action_field, (unsigned int) ie_len);
1117 return;
1118 }
1119 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field);
1120
1121 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) {
1122 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x",
1123 WPA_GET_LE16(ies));
1124 ies += 2; /* capability */
1125 ie_len -= 2;
1126 }
1127 if (action_field == PLINK_CONFIRM) {
1128 aid = WPA_GET_LE16(ies);
1129 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid);
1130 ies += 2; /* aid */
1131 ie_len -= 2;
1132 }
1133
1134 /* check for mesh peering, mesh id and mesh config IEs */
1135 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
1136 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs");
1137 return;
1138 }
1139 if (!elems.peer_mgmt) {
1140 wpa_printf(MSG_DEBUG,
1141 "MPM: No Mesh Peering Management element");
1142 return;
1143 }
1144 if (action_field != PLINK_CLOSE) {
1145 if (!elems.mesh_id || !elems.mesh_config) {
1146 wpa_printf(MSG_DEBUG,
1147 "MPM: No Mesh ID or Mesh Configuration element");
1148 return;
1149 }
1150
1151 if (!matches_local(wpa_s, &elems)) {
1152 wpa_printf(MSG_DEBUG,
1153 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS");
1154 return;
1155 }
1156 }
1157
1158 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field,
1159 elems.peer_mgmt,
1160 elems.peer_mgmt_len,
1161 &peer_mgmt_ie);
1162 if (ret) {
1163 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame");
1164 return;
1165 }
1166
1167 /* the sender's llid is our plid and vice-versa */
1168 plid = WPA_GET_LE16(peer_mgmt_ie.llid);
1169 if (peer_mgmt_ie.plid)
1170 llid = WPA_GET_LE16(peer_mgmt_ie.plid);
1171 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid);
1172
1173 if (action_field == PLINK_CLOSE)
1174 wpa_printf(MSG_DEBUG, "MPM: close reason=%u",
1175 WPA_GET_LE16(peer_mgmt_ie.reason));
1176
1177 sta = ap_get_sta(hapd, mgmt->sa);
1178
1179 /*
1180 * If this is an open frame from an unknown STA, and this is an
1181 * open mesh, then go ahead and add the peer before proceeding.
1182 */
1183 if (!sta && action_field == PLINK_OPEN &&
1184 (!(mconf->security & MESH_CONF_SEC_AMPE) ||
1185 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL)))
1186 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems);
1187
1188 if (!sta) {
1189 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer");
1190 return;
1191 }
1192
1193 #ifdef CONFIG_SAE
1194 /* peer is in sae_accepted? */
1195 if (sta->sae && sta->sae->state != SAE_ACCEPTED) {
1196 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer");
1197 return;
1198 }
1199 #endif /* CONFIG_SAE */
1200
1201 if (!sta->my_lid)
1202 mesh_mpm_init_link(wpa_s, sta);
1203
1204 if (mconf->security & MESH_CONF_SEC_AMPE) {
1205 int res;
1206
1207 res = mesh_rsn_process_ampe(wpa_s, sta, &elems,
1208 &mgmt->u.action.category,
1209 peer_mgmt_ie.chosen_pmk,
1210 ies, ie_len);
1211 if (res) {
1212 wpa_printf(MSG_DEBUG,
1213 "MPM: RSN process rejected frame (res=%d)",
1214 res);
1215 if (action_field == PLINK_OPEN && res == -2) {
1216 /* AES-SIV decryption failed */
1217 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT,
1218 WLAN_REASON_MESH_INVALID_GTK);
1219 }
1220 return;
1221 }
1222
1223 #ifdef CONFIG_OCV
1224 if (action_field == PLINK_OPEN && elems.rsn_ie) {
1225 struct wpa_state_machine *sm = sta->wpa_sm;
1226 struct wpa_ie_data data;
1227
1228 res = wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2,
1229 elems.rsn_ie_len + 2,
1230 &data);
1231 if (res) {
1232 wpa_printf(MSG_DEBUG,
1233 "Failed to parse RSN IE (res=%d)",
1234 res);
1235 wpa_hexdump(MSG_DEBUG, "RSN IE", elems.rsn_ie,
1236 elems.rsn_ie_len);
1237 return;
1238 }
1239
1240 wpa_auth_set_ocv(sm, mconf->ocv &&
1241 (data.capabilities &
1242 WPA_CAPABILITY_OCVC));
1243 }
1244
1245 if (action_field != PLINK_CLOSE &&
1246 wpa_auth_uses_ocv(sta->wpa_sm)) {
1247 struct wpa_channel_info ci;
1248 int tx_chanwidth;
1249 int tx_seg1_idx;
1250
1251 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
1252 wpa_printf(MSG_WARNING,
1253 "MPM: Failed to get channel info to validate received OCI in MPM Confirm");
1254 return;
1255 }
1256
1257 if (get_tx_parameters(
1258 sta, channel_width_to_int(ci.chanwidth),
1259 ci.seg1_idx, &tx_chanwidth,
1260 &tx_seg1_idx) < 0)
1261 return;
1262
1263 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci,
1264 tx_chanwidth, tx_seg1_idx) !=
1265 0) {
1266 wpa_printf(MSG_WARNING, "MPM: %s",
1267 ocv_errorstr);
1268 return;
1269 }
1270 }
1271 #endif /* CONFIG_OCV */
1272 }
1273
1274 if (sta->plink_state == PLINK_BLOCKED) {
1275 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED");
1276 return;
1277 }
1278
1279 /* Now we will figure out the appropriate event... */
1280 switch (action_field) {
1281 case PLINK_OPEN:
1282 if (plink_free_count(hapd) == 0) {
1283 event = REQ_RJCT;
1284 reason = WLAN_REASON_MESH_MAX_PEERS;
1285 wpa_printf(MSG_INFO,
1286 "MPM: Peer link num over quota(%d)",
1287 hapd->max_plinks);
1288 } else if (sta->peer_lid && sta->peer_lid != plid) {
1289 wpa_printf(MSG_DEBUG,
1290 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1291 sta->peer_lid, plid);
1292 return; /* no FSM event */
1293 } else {
1294 sta->peer_lid = plid;
1295 event = OPN_ACPT;
1296 }
1297 break;
1298 case PLINK_CONFIRM:
1299 if (plink_free_count(hapd) == 0) {
1300 event = REQ_RJCT;
1301 reason = WLAN_REASON_MESH_MAX_PEERS;
1302 wpa_printf(MSG_INFO,
1303 "MPM: Peer link num over quota(%d)",
1304 hapd->max_plinks);
1305 } else if (sta->my_lid != llid ||
1306 (sta->peer_lid && sta->peer_lid != plid)) {
1307 wpa_printf(MSG_DEBUG,
1308 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x",
1309 sta->my_lid, llid, sta->peer_lid, plid);
1310 return; /* no FSM event */
1311 } else {
1312 if (!sta->peer_lid)
1313 sta->peer_lid = plid;
1314 sta->peer_aid = aid;
1315 event = CNF_ACPT;
1316 }
1317 break;
1318 case PLINK_CLOSE:
1319 if (sta->plink_state == PLINK_ESTAB)
1320 /* Do not check for llid or plid. This does not
1321 * follow the standard but since multiple plinks
1322 * per cand are not supported, it is necessary in
1323 * order to avoid a livelock when MP A sees an
1324 * establish peer link to MP B but MP B does not
1325 * see it. This can be caused by a timeout in
1326 * B's peer link establishment or B being
1327 * restarted.
1328 */
1329 event = CLS_ACPT;
1330 else if (sta->peer_lid != plid) {
1331 wpa_printf(MSG_DEBUG,
1332 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1333 sta->peer_lid, plid);
1334 return; /* no FSM event */
1335 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) {
1336 wpa_printf(MSG_DEBUG,
1337 "MPM: my_lid mismatch: 0x%x != 0x%x",
1338 sta->my_lid, llid);
1339 return; /* no FSM event */
1340 } else {
1341 event = CLS_ACPT;
1342 }
1343 break;
1344 default:
1345 /*
1346 * This cannot be hit due to the action_field check above, but
1347 * compilers may not be able to figure that out and can warn
1348 * about uninitialized event below.
1349 */
1350 return;
1351 }
1352 mesh_mpm_fsm(wpa_s, sta, event, reason);
1353 }
1354
1355
1356 /* called by ap_free_sta */
1357 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
1358 {
1359 if (sta->plink_state == PLINK_ESTAB)
1360 hapd->num_plinks--;
1361 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta);
1362 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta);
1363 }
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