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mesh: Calculate MTK before sending it to MAC in case Open is dropped
[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 OPN_IGNR,
39 CNF_ACPT,
40 CNF_RJCT,
41 CNF_IGNR,
42 CLS_ACPT,
43 CLS_IGNR
44 };
45
46 static const char * const mplstate[] = {
47 [0] = "UNINITIALIZED",
48 [PLINK_LISTEN] = "LISTEN",
49 [PLINK_OPEN_SENT] = "OPEN_SENT",
50 [PLINK_OPEN_RCVD] = "OPEN_RCVD",
51 [PLINK_CNF_RCVD] = "CNF_RCVD",
52 [PLINK_ESTAB] = "ESTAB",
53 [PLINK_HOLDING] = "HOLDING",
54 [PLINK_BLOCKED] = "BLOCKED"
55 };
56
57 static const char * const mplevent[] = {
58 [PLINK_UNDEFINED] = "UNDEFINED",
59 [OPN_ACPT] = "OPN_ACPT",
60 [OPN_RJCT] = "OPN_RJCT",
61 [OPN_IGNR] = "OPN_IGNR",
62 [CNF_ACPT] = "CNF_ACPT",
63 [CNF_RJCT] = "CNF_RJCT",
64 [CNF_IGNR] = "CNF_IGNR",
65 [CLS_ACPT] = "CLS_ACPT",
66 [CLS_IGNR] = "CLS_IGNR"
67 };
68
69
70 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s,
71 u8 action_field,
72 const u8 *ie, size_t len,
73 struct mesh_peer_mgmt_ie *mpm_ie)
74 {
75 os_memset(mpm_ie, 0, sizeof(*mpm_ie));
76
77 /* Remove optional Chosen PMK field at end */
78 if (len >= SAE_PMKID_LEN) {
79 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN;
80 len -= SAE_PMKID_LEN;
81 }
82
83 if ((action_field == PLINK_OPEN && len != 4) ||
84 (action_field == PLINK_CONFIRM && len != 6) ||
85 (action_field == PLINK_CLOSE && len != 6 && len != 8)) {
86 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie");
87 return -1;
88 }
89
90 /* required fields */
91 if (len < 4)
92 return -1;
93 mpm_ie->proto_id = ie;
94 mpm_ie->llid = ie + 2;
95 ie += 4;
96 len -= 4;
97
98 /* close reason is always present at end for close */
99 if (action_field == PLINK_CLOSE) {
100 if (len < 2)
101 return -1;
102 mpm_ie->reason = ie + len - 2;
103 len -= 2;
104 }
105
106 /* Peer Link ID, present for confirm, and possibly close */
107 if (len >= 2)
108 mpm_ie->plid = ie;
109
110 return 0;
111 }
112
113
114 static int plink_free_count(struct hostapd_data *hapd)
115 {
116 if (hapd->max_plinks > hapd->num_plinks)
117 return hapd->max_plinks - hapd->num_plinks;
118 return 0;
119 }
120
121
122 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s,
123 struct sta_info *sta,
124 struct ieee802_11_elems *elems)
125 {
126 if (!elems->supp_rates) {
127 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR,
128 MAC2STR(sta->addr));
129 return WLAN_STATUS_UNSPECIFIED_FAILURE;
130 }
131
132 if (elems->supp_rates_len + elems->ext_supp_rates_len >
133 sizeof(sta->supported_rates)) {
134 wpa_msg(wpa_s, MSG_ERROR,
135 "Invalid supported rates element length " MACSTR
136 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len,
137 elems->ext_supp_rates_len);
138 return WLAN_STATUS_UNSPECIFIED_FAILURE;
139 }
140
141 sta->supported_rates_len = merge_byte_arrays(
142 sta->supported_rates, sizeof(sta->supported_rates),
143 elems->supp_rates, elems->supp_rates_len,
144 elems->ext_supp_rates, elems->ext_supp_rates_len);
145
146 return WLAN_STATUS_SUCCESS;
147 }
148
149
150 /* return true if elems from a neighbor match this MBSS */
151 static Boolean matches_local(struct wpa_supplicant *wpa_s,
152 struct ieee802_11_elems *elems)
153 {
154 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
155
156 if (elems->mesh_config_len < 5)
157 return FALSE;
158
159 return (mconf->meshid_len == elems->mesh_id_len &&
160 os_memcmp(mconf->meshid, elems->mesh_id,
161 elems->mesh_id_len) == 0 &&
162 mconf->mesh_pp_id == elems->mesh_config[0] &&
163 mconf->mesh_pm_id == elems->mesh_config[1] &&
164 mconf->mesh_cc_id == elems->mesh_config[2] &&
165 mconf->mesh_sp_id == elems->mesh_config[3] &&
166 mconf->mesh_auth_id == elems->mesh_config[4]);
167 }
168
169
170 /* check if local link id is already used with another peer */
171 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid)
172 {
173 struct sta_info *sta;
174 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
175
176 for (sta = hapd->sta_list; sta; sta = sta->next) {
177 if (sta->my_lid == llid)
178 return TRUE;
179 }
180
181 return FALSE;
182 }
183
184
185 /* generate an llid for a link and set to initial state */
186 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s,
187 struct sta_info *sta)
188 {
189 u16 llid;
190
191 do {
192 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0)
193 continue;
194 } while (!llid || llid_in_use(wpa_s, llid));
195
196 sta->my_lid = llid;
197 sta->peer_lid = 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_LISTEN;
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 + /* capability info */
227 2 + /* AID */
228 2 + 8 + /* supported rates */
229 2 + (32 - 8) +
230 2 + 32 + /* mesh ID */
231 2 + 7 + /* mesh config */
232 2 + 23 + /* peering management */
233 2 + 96 + /* AMPE */
234 2 + 16; /* MIC */
235 #ifdef CONFIG_IEEE80211N
236 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
237 buf_len += 2 + 26 + /* HT capabilities */
238 2 + 22; /* HT operation */
239 }
240 #endif /* CONFIG_IEEE80211N */
241 #ifdef CONFIG_IEEE80211AC
242 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
243 buf_len += 2 + 12 + /* VHT Capabilities */
244 2 + 5; /* VHT Operation */
245 }
246 #endif /* CONFIG_IEEE80211AC */
247 if (type != PLINK_CLOSE)
248 buf_len += conf->rsn_ie_len; /* RSN IE */
249
250 buf = wpabuf_alloc(buf_len);
251 if (!buf)
252 return;
253
254 cat = wpabuf_mhead_u8(buf);
255 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED);
256 wpabuf_put_u8(buf, type);
257
258 if (type != PLINK_CLOSE) {
259 u8 info;
260
261 /* capability info */
262 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0);
263
264 /* aid */
265 if (type == PLINK_CONFIRM)
266 wpabuf_put_le16(buf, sta->aid);
267
268 /* IE: supp + ext. supp rates */
269 pos = hostapd_eid_supp_rates(bss, supp_rates);
270 pos = hostapd_eid_ext_supp_rates(bss, pos);
271 wpabuf_put_data(buf, supp_rates, pos - supp_rates);
272
273 /* IE: RSN IE */
274 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len);
275
276 /* IE: Mesh ID */
277 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
278 wpabuf_put_u8(buf, conf->meshid_len);
279 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
280
281 /* IE: mesh conf */
282 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG);
283 wpabuf_put_u8(buf, 7);
284 wpabuf_put_u8(buf, conf->mesh_pp_id);
285 wpabuf_put_u8(buf, conf->mesh_pm_id);
286 wpabuf_put_u8(buf, conf->mesh_cc_id);
287 wpabuf_put_u8(buf, conf->mesh_sp_id);
288 wpabuf_put_u8(buf, conf->mesh_auth_id);
289 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1;
290 /* TODO: Add Connected to Mesh Gate/AS subfields */
291 wpabuf_put_u8(buf, info);
292 /* always forwarding & accepting plinks for now */
293 wpabuf_put_u8(buf, 0x1 | 0x8);
294 } else { /* Peer closing frame */
295 /* IE: Mesh ID */
296 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
297 wpabuf_put_u8(buf, conf->meshid_len);
298 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
299 }
300
301 /* IE: Mesh Peering Management element */
302 ie_len = 4;
303 if (ampe)
304 ie_len += PMKID_LEN;
305 switch (type) {
306 case PLINK_OPEN:
307 break;
308 case PLINK_CONFIRM:
309 ie_len += 2;
310 add_plid = 1;
311 break;
312 case PLINK_CLOSE:
313 ie_len += 2;
314 add_plid = 1;
315 ie_len += 2; /* reason code */
316 break;
317 }
318
319 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT);
320 wpabuf_put_u8(buf, ie_len);
321 /* peering protocol */
322 if (ampe)
323 wpabuf_put_le16(buf, 1);
324 else
325 wpabuf_put_le16(buf, 0);
326 wpabuf_put_le16(buf, sta->my_lid);
327 if (add_plid)
328 wpabuf_put_le16(buf, sta->peer_lid);
329 if (type == PLINK_CLOSE)
330 wpabuf_put_le16(buf, close_reason);
331 if (ampe) {
332 if (sta->sae == NULL) {
333 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session");
334 goto fail;
335 }
336 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta,
337 wpabuf_put(buf, PMKID_LEN));
338 }
339
340 #ifdef CONFIG_IEEE80211N
341 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
342 u8 ht_capa_oper[2 + 26 + 2 + 22];
343
344 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper);
345 pos = hostapd_eid_ht_operation(bss, pos);
346 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper);
347 }
348 #endif /* CONFIG_IEEE80211N */
349 #ifdef CONFIG_IEEE80211AC
350 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
351 u8 vht_capa_oper[2 + 12 + 2 + 5];
352
353 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper);
354 pos = hostapd_eid_vht_operation(bss, pos);
355 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper);
356 }
357 #endif /* CONFIG_IEEE80211AC */
358
359 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) {
360 wpa_msg(wpa_s, MSG_INFO,
361 "Mesh MPM: failed to add AMPE and MIC IE");
362 goto fail;
363 }
364
365 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to "
366 MACSTR " (my_lid=0x%x peer_lid=0x%x)",
367 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid);
368 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0,
369 sta->addr, wpa_s->own_addr, wpa_s->own_addr,
370 wpabuf_head(buf), wpabuf_len(buf), 0);
371 if (ret < 0)
372 wpa_msg(wpa_s, MSG_INFO,
373 "Mesh MPM: failed to send peering frame");
374
375 fail:
376 wpabuf_free(buf);
377 }
378
379
380 /* configure peering state in ours and driver's station entry */
381 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s,
382 struct sta_info *sta,
383 enum mesh_plink_state state)
384 {
385 struct hostapd_sta_add_params params;
386 int ret;
387
388 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s",
389 MAC2STR(sta->addr), mplstate[sta->plink_state],
390 mplstate[state]);
391 sta->plink_state = state;
392
393 os_memset(&params, 0, sizeof(params));
394 params.addr = sta->addr;
395 params.plink_state = state;
396 params.set = 1;
397
398 ret = wpa_drv_sta_add(wpa_s, &params);
399 if (ret) {
400 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR
401 ": %d", MAC2STR(sta->addr), ret);
402 }
403 }
404
405
406 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s,
407 struct sta_info *sta)
408 {
409 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
410
411 eloop_cancel_timeout(plink_timer, wpa_s, sta);
412
413 ap_free_sta(hapd, sta);
414 }
415
416
417 static void plink_timer(void *eloop_ctx, void *user_data)
418 {
419 struct wpa_supplicant *wpa_s = eloop_ctx;
420 struct sta_info *sta = user_data;
421 u16 reason = 0;
422 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
423 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
424
425 switch (sta->plink_state) {
426 case PLINK_OPEN_RCVD:
427 case PLINK_OPEN_SENT:
428 /* retry timer */
429 if (sta->mpm_retries < conf->dot11MeshMaxRetries) {
430 eloop_register_timeout(
431 conf->dot11MeshRetryTimeout / 1000,
432 (conf->dot11MeshRetryTimeout % 1000) * 1000,
433 plink_timer, wpa_s, sta);
434 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
435 sta->mpm_retries++;
436 break;
437 }
438 reason = WLAN_REASON_MESH_MAX_RETRIES;
439 /* fall through on else */
440
441 case PLINK_CNF_RCVD:
442 /* confirm timer */
443 if (!reason)
444 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT;
445 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
446 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000,
447 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
448 plink_timer, wpa_s, sta);
449 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
450 break;
451 case PLINK_HOLDING:
452 /* holding timer */
453
454 if (sta->mesh_sae_pmksa_caching) {
455 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR
456 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it",
457 MAC2STR(sta->addr));
458 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
459 }
460 mesh_mpm_fsm_restart(wpa_s, sta);
461 break;
462 default:
463 break;
464 }
465 }
466
467
468 /* initiate peering with station */
469 static void
470 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta,
471 enum mesh_plink_state next_state)
472 {
473 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
474
475 eloop_cancel_timeout(plink_timer, wpa_s, sta);
476 eloop_register_timeout(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 wpa_mesh_set_plink_state(wpa_s, sta, next_state);
481 }
482
483
484 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta,
485 void *ctx)
486 {
487 struct wpa_supplicant *wpa_s = ctx;
488 int reason = WLAN_REASON_MESH_PEERING_CANCELLED;
489
490 if (sta) {
491 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
492 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
493 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR,
494 MAC2STR(sta->addr));
495 eloop_cancel_timeout(plink_timer, wpa_s, sta);
496 return 0;
497 }
498
499 return 1;
500 }
501
502
503 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
504 {
505 struct hostapd_data *hapd;
506 struct sta_info *sta;
507
508 if (!wpa_s->ifmsh) {
509 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet");
510 return -1;
511 }
512
513 hapd = wpa_s->ifmsh->bss[0];
514 sta = ap_get_sta(hapd, addr);
515 if (!sta) {
516 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer");
517 return -1;
518 }
519
520 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1;
521 }
522
523
524 static void peer_add_timer(void *eloop_ctx, void *user_data)
525 {
526 struct wpa_supplicant *wpa_s = eloop_ctx;
527 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
528
529 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN);
530 }
531
532
533 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
534 int duration)
535 {
536 struct wpa_ssid *ssid = wpa_s->current_ssid;
537 struct hostapd_data *hapd;
538 struct sta_info *sta;
539 struct mesh_conf *conf;
540
541 if (!wpa_s->ifmsh) {
542 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet");
543 return -1;
544 }
545
546 if (!ssid || !ssid->no_auto_peer) {
547 wpa_msg(wpa_s, MSG_INFO,
548 "This command is available only with no_auto_peer mesh network");
549 return -1;
550 }
551
552 hapd = wpa_s->ifmsh->bss[0];
553 conf = wpa_s->ifmsh->mconf;
554
555 sta = ap_get_sta(hapd, addr);
556 if (!sta) {
557 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer");
558 return -1;
559 }
560
561 if ((PLINK_OPEN_SENT <= sta->plink_state &&
562 sta->plink_state <= PLINK_ESTAB) ||
563 (sta->sae && sta->sae->state > SAE_NOTHING)) {
564 wpa_msg(wpa_s, MSG_INFO,
565 "Specified peer is connecting/connected");
566 return -1;
567 }
568
569 if (conf->security == MESH_CONF_SEC_NONE) {
570 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_SENT);
571 } else {
572 mesh_rsn_auth_sae_sta(wpa_s, sta);
573 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN);
574 eloop_register_timeout(duration == -1 ? 10 : duration, 0,
575 peer_add_timer, wpa_s, NULL);
576 }
577
578 return 0;
579 }
580
581
582 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh)
583 {
584 struct hostapd_data *hapd = ifmsh->bss[0];
585
586 /* notify peers we're leaving */
587 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s);
588
589 hapd->num_plinks = 0;
590 hostapd_free_stas(hapd);
591 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
592 }
593
594
595 /* for mesh_rsn to indicate this peer has completed authentication, and we're
596 * ready to start AMPE */
597 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
598 {
599 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
600 struct hostapd_sta_add_params params;
601 struct sta_info *sta;
602 int ret;
603
604 sta = ap_get_sta(data, addr);
605 if (!sta) {
606 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer");
607 return;
608 }
609
610 /* TODO: Should do nothing if this STA is already authenticated, but
611 * the AP code already sets this flag. */
612 sta->flags |= WLAN_STA_AUTH;
613
614 mesh_rsn_init_ampe_sta(wpa_s, sta);
615
616 os_memset(&params, 0, sizeof(params));
617 params.addr = sta->addr;
618 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED;
619 params.set = 1;
620
621 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR,
622 MAC2STR(sta->addr));
623 ret = wpa_drv_sta_add(wpa_s, &params);
624 if (ret) {
625 wpa_msg(wpa_s, MSG_ERROR,
626 "Driver failed to set " MACSTR ": %d",
627 MAC2STR(sta->addr), ret);
628 }
629
630 if (!sta->my_lid)
631 mesh_mpm_init_link(wpa_s, sta);
632
633 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_SENT);
634 }
635
636 /*
637 * Initialize a sta_info structure for a peer and upload it into the driver
638 * in preparation for beginning authentication or peering. This is done when a
639 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is
640 * received from the peer for the first time.
641 */
642 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s,
643 const u8 *addr,
644 struct ieee802_11_elems *elems)
645 {
646 struct hostapd_sta_add_params params;
647 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
648 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
649 struct sta_info *sta;
650 int ret;
651
652 sta = ap_get_sta(data, addr);
653 if (!sta) {
654 sta = ap_sta_add(data, addr);
655 if (!sta)
656 return NULL;
657 }
658
659 /* Set WMM by default since Mesh STAs are QoS STAs */
660 sta->flags |= WLAN_STA_WMM;
661
662 /* initialize sta */
663 if (copy_supp_rates(wpa_s, sta, elems)) {
664 ap_free_sta(data, sta);
665 return NULL;
666 }
667
668 if (!sta->my_lid)
669 mesh_mpm_init_link(wpa_s, sta);
670
671 #ifdef CONFIG_IEEE80211N
672 copy_sta_ht_capab(data, sta, elems->ht_capabilities);
673 update_ht_state(data, sta);
674 #endif /* CONFIG_IEEE80211N */
675
676 #ifdef CONFIG_IEEE80211AC
677 copy_sta_vht_capab(data, sta, elems->vht_capabilities);
678 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif);
679 #endif /* CONFIG_IEEE80211AC */
680
681 if (hostapd_get_aid(data, sta) < 0) {
682 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available");
683 ap_free_sta(data, sta);
684 return NULL;
685 }
686
687 /* insert into driver */
688 os_memset(&params, 0, sizeof(params));
689 params.supp_rates = sta->supported_rates;
690 params.supp_rates_len = sta->supported_rates_len;
691 params.addr = addr;
692 params.plink_state = sta->plink_state;
693 params.aid = sta->aid;
694 params.listen_interval = 100;
695 params.ht_capabilities = sta->ht_capabilities;
696 params.vht_capabilities = sta->vht_capabilities;
697 params.flags |= WPA_STA_WMM;
698 params.flags_mask |= WPA_STA_AUTHENTICATED;
699 if (conf->security == MESH_CONF_SEC_NONE) {
700 params.flags |= WPA_STA_AUTHORIZED;
701 params.flags |= WPA_STA_AUTHENTICATED;
702 } else {
703 sta->flags |= WLAN_STA_MFP;
704 params.flags |= WPA_STA_MFP;
705 }
706
707 ret = wpa_drv_sta_add(wpa_s, &params);
708 if (ret) {
709 wpa_msg(wpa_s, MSG_ERROR,
710 "Driver failed to insert " MACSTR ": %d",
711 MAC2STR(addr), ret);
712 ap_free_sta(data, sta);
713 return NULL;
714 }
715
716 return sta;
717 }
718
719
720 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
721 struct ieee802_11_elems *elems)
722 {
723 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
724 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
725 struct sta_info *sta;
726 struct wpa_ssid *ssid = wpa_s->current_ssid;
727
728 sta = mesh_mpm_add_peer(wpa_s, addr, elems);
729 if (!sta)
730 return;
731
732 if (ssid && ssid->no_auto_peer &&
733 (is_zero_ether_addr(data->mesh_required_peer) ||
734 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) {
735 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with "
736 MACSTR " because of no_auto_peer", MAC2STR(addr));
737 if (data->mesh_pending_auth) {
738 struct os_reltime age;
739 const struct ieee80211_mgmt *mgmt;
740 struct hostapd_frame_info fi;
741
742 mgmt = wpabuf_head(data->mesh_pending_auth);
743 os_reltime_age(&data->mesh_pending_auth_time, &age);
744 if (age.sec < 2 &&
745 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) {
746 wpa_printf(MSG_DEBUG,
747 "mesh: Process pending Authentication frame from %u.%06u seconds ago",
748 (unsigned int) age.sec,
749 (unsigned int) age.usec);
750 os_memset(&fi, 0, sizeof(fi));
751 ieee802_11_mgmt(
752 data,
753 wpabuf_head(data->mesh_pending_auth),
754 wpabuf_len(data->mesh_pending_auth),
755 &fi);
756 }
757 wpabuf_free(data->mesh_pending_auth);
758 data->mesh_pending_auth = NULL;
759 }
760 return;
761 }
762
763 if (conf->security == MESH_CONF_SEC_NONE) {
764 if (sta->plink_state < PLINK_OPEN_SENT ||
765 sta->plink_state > PLINK_ESTAB)
766 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_SENT);
767 } else {
768 mesh_rsn_auth_sae_sta(wpa_s, sta);
769 }
770 }
771
772
773 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt)
774 {
775 struct hostapd_frame_info fi;
776
777 os_memset(&fi, 0, sizeof(fi));
778 fi.datarate = rx_mgmt->datarate;
779 fi.ssi_signal = rx_mgmt->ssi_signal;
780 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame,
781 rx_mgmt->frame_len, &fi);
782 }
783
784
785 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
786 struct sta_info *sta)
787 {
788 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
789 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
790 u8 seq[6] = {};
791
792 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established",
793 MAC2STR(sta->addr));
794
795 if (conf->security & MESH_CONF_SEC_AMPE) {
796 wpa_drv_set_key(wpa_s, WPA_ALG_CCMP, sta->addr, 0, 0,
797 seq, sizeof(seq), sta->mtk, sizeof(sta->mtk));
798 wpa_drv_set_key(wpa_s, WPA_ALG_CCMP, sta->addr, 1, 0,
799 seq, sizeof(seq),
800 sta->mgtk, sizeof(sta->mgtk));
801 wpa_drv_set_key(wpa_s, WPA_ALG_IGTK, sta->addr, 4, 0,
802 seq, sizeof(seq),
803 sta->mgtk, sizeof(sta->mgtk));
804
805 wpa_hexdump_key(MSG_DEBUG, "mtk:", sta->mtk, sizeof(sta->mtk));
806 wpa_hexdump_key(MSG_DEBUG, "mgtk:",
807 sta->mgtk, sizeof(sta->mgtk));
808 }
809
810 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);
811 hapd->num_plinks++;
812
813 sta->flags |= WLAN_STA_ASSOC;
814 sta->mesh_sae_pmksa_caching = 0;
815
816 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
817 peer_add_timer(wpa_s, NULL);
818 eloop_cancel_timeout(plink_timer, wpa_s, sta);
819
820 /* Send ctrl event */
821 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR,
822 MAC2STR(sta->addr));
823 }
824
825
826 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
827 enum plink_event event)
828 {
829 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
830 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
831 u16 reason = 0;
832
833 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s",
834 MAC2STR(sta->addr), mplstate[sta->plink_state],
835 mplevent[event]);
836
837 switch (sta->plink_state) {
838 case PLINK_LISTEN:
839 switch (event) {
840 case CLS_ACPT:
841 mesh_mpm_fsm_restart(wpa_s, sta);
842 break;
843 case OPN_ACPT:
844 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_RCVD);
845 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM,
846 0);
847 break;
848 default:
849 break;
850 }
851 break;
852 case PLINK_OPEN_SENT:
853 switch (event) {
854 case OPN_RJCT:
855 case CNF_RJCT:
856 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
857 /* fall-through */
858 case CLS_ACPT:
859 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
860 if (!reason)
861 reason = WLAN_REASON_MESH_CLOSE_RCVD;
862 eloop_register_timeout(
863 conf->dot11MeshHoldingTimeout / 1000,
864 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
865 plink_timer, wpa_s, sta);
866 mesh_mpm_send_plink_action(wpa_s, sta,
867 PLINK_CLOSE, reason);
868 break;
869 case OPN_ACPT:
870 /* retry timer is left untouched */
871 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPEN_RCVD);
872 mesh_mpm_send_plink_action(wpa_s, sta,
873 PLINK_CONFIRM, 0);
874 break;
875 case CNF_ACPT:
876 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
877 eloop_cancel_timeout(plink_timer, wpa_s, sta);
878 eloop_register_timeout(
879 conf->dot11MeshConfirmTimeout / 1000,
880 (conf->dot11MeshConfirmTimeout % 1000) * 1000,
881 plink_timer, wpa_s, sta);
882 break;
883 default:
884 break;
885 }
886 break;
887 case PLINK_OPEN_RCVD:
888 switch (event) {
889 case OPN_RJCT:
890 case CNF_RJCT:
891 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
892 /* fall-through */
893 case CLS_ACPT:
894 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
895 if (!reason)
896 reason = WLAN_REASON_MESH_CLOSE_RCVD;
897 eloop_register_timeout(
898 conf->dot11MeshHoldingTimeout / 1000,
899 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
900 plink_timer, wpa_s, sta);
901 sta->mpm_close_reason = reason;
902 mesh_mpm_send_plink_action(wpa_s, sta,
903 PLINK_CLOSE, reason);
904 break;
905 case OPN_ACPT:
906 mesh_mpm_send_plink_action(wpa_s, sta,
907 PLINK_CONFIRM, 0);
908 break;
909 case CNF_ACPT:
910 if (conf->security & MESH_CONF_SEC_AMPE)
911 mesh_rsn_derive_mtk(wpa_s, sta);
912 mesh_mpm_plink_estab(wpa_s, sta);
913 break;
914 default:
915 break;
916 }
917 break;
918 case PLINK_CNF_RCVD:
919 switch (event) {
920 case OPN_RJCT:
921 case CNF_RJCT:
922 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
923 /* fall-through */
924 case CLS_ACPT:
925 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
926 if (!reason)
927 reason = WLAN_REASON_MESH_CLOSE_RCVD;
928 eloop_register_timeout(
929 conf->dot11MeshHoldingTimeout / 1000,
930 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
931 plink_timer, wpa_s, sta);
932 sta->mpm_close_reason = reason;
933 mesh_mpm_send_plink_action(wpa_s, sta,
934 PLINK_CLOSE, reason);
935 break;
936 case OPN_ACPT:
937 if (conf->security & MESH_CONF_SEC_AMPE)
938 mesh_rsn_derive_mtk(wpa_s, sta);
939 mesh_mpm_plink_estab(wpa_s, sta);
940 mesh_mpm_send_plink_action(wpa_s, sta,
941 PLINK_CONFIRM, 0);
942 break;
943 default:
944 break;
945 }
946 break;
947 case PLINK_ESTAB:
948 switch (event) {
949 case CLS_ACPT:
950 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
951 reason = WLAN_REASON_MESH_CLOSE_RCVD;
952
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
959 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR
960 " closed with reason %d",
961 MAC2STR(sta->addr), reason);
962
963 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR,
964 MAC2STR(sta->addr));
965
966 hapd->num_plinks--;
967
968 mesh_mpm_send_plink_action(wpa_s, sta,
969 PLINK_CLOSE, reason);
970 break;
971 case OPN_ACPT:
972 mesh_mpm_send_plink_action(wpa_s, sta,
973 PLINK_CONFIRM, 0);
974 break;
975 default:
976 break;
977 }
978 break;
979 case PLINK_HOLDING:
980 switch (event) {
981 case CLS_ACPT:
982 mesh_mpm_fsm_restart(wpa_s, sta);
983 break;
984 case OPN_ACPT:
985 case CNF_ACPT:
986 case OPN_RJCT:
987 case CNF_RJCT:
988 reason = sta->mpm_close_reason;
989 mesh_mpm_send_plink_action(wpa_s, sta,
990 PLINK_CLOSE, reason);
991 break;
992 default:
993 break;
994 }
995 break;
996 default:
997 wpa_msg(wpa_s, MSG_DEBUG,
998 "Unsupported MPM event %s for state %s",
999 mplevent[event], mplstate[sta->plink_state]);
1000 break;
1001 }
1002 }
1003
1004
1005 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s,
1006 const struct ieee80211_mgmt *mgmt, size_t len)
1007 {
1008 u8 action_field;
1009 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
1010 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
1011 struct sta_info *sta;
1012 u16 plid = 0, llid = 0;
1013 enum plink_event event;
1014 struct ieee802_11_elems elems;
1015 struct mesh_peer_mgmt_ie peer_mgmt_ie;
1016 const u8 *ies;
1017 size_t ie_len;
1018 int ret;
1019
1020 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED)
1021 return;
1022
1023 action_field = mgmt->u.action.u.slf_prot_action.action;
1024 if (action_field != PLINK_OPEN &&
1025 action_field != PLINK_CONFIRM &&
1026 action_field != PLINK_CLOSE)
1027 return;
1028
1029 ies = mgmt->u.action.u.slf_prot_action.variable;
1030 ie_len = (const u8 *) mgmt + len -
1031 mgmt->u.action.u.slf_prot_action.variable;
1032
1033 /* at least expect mesh id and peering mgmt */
1034 if (ie_len < 2 + 2) {
1035 wpa_printf(MSG_DEBUG,
1036 "MPM: Ignore too short action frame %u ie_len %u",
1037 action_field, (unsigned int) ie_len);
1038 return;
1039 }
1040 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field);
1041
1042 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) {
1043 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x",
1044 WPA_GET_LE16(ies));
1045 ies += 2; /* capability */
1046 ie_len -= 2;
1047 }
1048 if (action_field == PLINK_CONFIRM) {
1049 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", WPA_GET_LE16(ies));
1050 ies += 2; /* aid */
1051 ie_len -= 2;
1052 }
1053
1054 /* check for mesh peering, mesh id and mesh config IEs */
1055 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
1056 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs");
1057 return;
1058 }
1059 if (!elems.peer_mgmt) {
1060 wpa_printf(MSG_DEBUG,
1061 "MPM: No Mesh Peering Management element");
1062 return;
1063 }
1064 if (action_field != PLINK_CLOSE) {
1065 if (!elems.mesh_id || !elems.mesh_config) {
1066 wpa_printf(MSG_DEBUG,
1067 "MPM: No Mesh ID or Mesh Configuration element");
1068 return;
1069 }
1070
1071 if (!matches_local(wpa_s, &elems)) {
1072 wpa_printf(MSG_DEBUG,
1073 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS");
1074 return;
1075 }
1076 }
1077
1078 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field,
1079 elems.peer_mgmt,
1080 elems.peer_mgmt_len,
1081 &peer_mgmt_ie);
1082 if (ret) {
1083 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame");
1084 return;
1085 }
1086
1087 /* the sender's llid is our plid and vice-versa */
1088 plid = WPA_GET_LE16(peer_mgmt_ie.llid);
1089 if (peer_mgmt_ie.plid)
1090 llid = WPA_GET_LE16(peer_mgmt_ie.plid);
1091 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid);
1092
1093 sta = ap_get_sta(hapd, mgmt->sa);
1094
1095 /*
1096 * If this is an open frame from an unknown STA, and this is an
1097 * open mesh, then go ahead and add the peer before proceeding.
1098 */
1099 if (!sta && action_field == PLINK_OPEN &&
1100 (!(mconf->security & MESH_CONF_SEC_AMPE) ||
1101 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa)))
1102 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems);
1103
1104 if (!sta) {
1105 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer");
1106 return;
1107 }
1108
1109 #ifdef CONFIG_SAE
1110 /* peer is in sae_accepted? */
1111 if (sta->sae && sta->sae->state != SAE_ACCEPTED) {
1112 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer");
1113 return;
1114 }
1115 #endif /* CONFIG_SAE */
1116
1117 if (!sta->my_lid)
1118 mesh_mpm_init_link(wpa_s, sta);
1119
1120 if ((mconf->security & MESH_CONF_SEC_AMPE) &&
1121 mesh_rsn_process_ampe(wpa_s, sta, &elems,
1122 &mgmt->u.action.category,
1123 peer_mgmt_ie.chosen_pmk,
1124 ies, ie_len)) {
1125 wpa_printf(MSG_DEBUG, "MPM: RSN process rejected frame");
1126 return;
1127 }
1128
1129 if (sta->plink_state == PLINK_BLOCKED) {
1130 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED");
1131 return;
1132 }
1133
1134 /* Now we will figure out the appropriate event... */
1135 switch (action_field) {
1136 case PLINK_OPEN:
1137 if (plink_free_count(hapd) == 0) {
1138 event = OPN_IGNR;
1139 wpa_printf(MSG_INFO,
1140 "MPM: Peer link num over quota(%d)",
1141 hapd->max_plinks);
1142 } else if (sta->peer_lid && sta->peer_lid != plid) {
1143 event = OPN_IGNR;
1144 } else {
1145 sta->peer_lid = plid;
1146 event = OPN_ACPT;
1147 }
1148 break;
1149 case PLINK_CONFIRM:
1150 if (plink_free_count(hapd) == 0) {
1151 event = CNF_IGNR;
1152 wpa_printf(MSG_INFO,
1153 "MPM: Peer link num over quota(%d)",
1154 hapd->max_plinks);
1155 } else if (sta->my_lid != llid ||
1156 (sta->peer_lid && sta->peer_lid != plid)) {
1157 event = CNF_IGNR;
1158 } else {
1159 if (!sta->peer_lid)
1160 sta->peer_lid = plid;
1161 event = CNF_ACPT;
1162 }
1163 break;
1164 case PLINK_CLOSE:
1165 if (sta->plink_state == PLINK_ESTAB)
1166 /* Do not check for llid or plid. This does not
1167 * follow the standard but since multiple plinks
1168 * per cand are not supported, it is necessary in
1169 * order to avoid a livelock when MP A sees an
1170 * establish peer link to MP B but MP B does not
1171 * see it. This can be caused by a timeout in
1172 * B's peer link establishment or B being
1173 * restarted.
1174 */
1175 event = CLS_ACPT;
1176 else if (sta->peer_lid != plid)
1177 event = CLS_IGNR;
1178 else if (peer_mgmt_ie.plid && sta->my_lid != llid)
1179 event = CLS_IGNR;
1180 else
1181 event = CLS_ACPT;
1182 break;
1183 default:
1184 /*
1185 * This cannot be hit due to the action_field check above, but
1186 * compilers may not be able to figure that out and can warn
1187 * about uninitialized event below.
1188 */
1189 return;
1190 }
1191 mesh_mpm_fsm(wpa_s, sta, event);
1192 }
1193
1194
1195 /* called by ap_free_sta */
1196 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
1197 {
1198 if (sta->plink_state == PLINK_ESTAB)
1199 hapd->num_plinks--;
1200 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta);
1201 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta);
1202 }
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