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[thirdparty/hostap.git] / wpa_supplicant / mesh_mpm.c
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5f92659d
BC		 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 "wpa_supplicant_i.h"
18#include "driver_i.h"
19#include "mesh_mpm.h"
0f950df0 20#include "mesh_rsn.h"
5f92659d 21
5f92659d
BC		 22struct mesh_peer_mgmt_ie {
23 const u8 *proto_id;
24 const u8 *llid;
25 const u8 *plid;
26 const u8 *reason;
27 const u8 *pmk;
28};
29
30static void plink_timer(void *eloop_ctx, void *user_data);
31
32
33enum plink_event {
34 PLINK_UNDEFINED,
35 OPN_ACPT,
36 OPN_RJCT,
37 OPN_IGNR,
38 CNF_ACPT,
39 CNF_RJCT,
40 CNF_IGNR,
41 CLS_ACPT,
42 CLS_IGNR
43};
44
45static const char * const mplstate[] = {
46 [PLINK_LISTEN] = "LISTEN",
47 [PLINK_OPEN_SENT] = "OPEN_SENT",
48 [PLINK_OPEN_RCVD] = "OPEN_RCVD",
49 [PLINK_CNF_RCVD] = "CNF_RCVD",
50 [PLINK_ESTAB] = "ESTAB",
51 [PLINK_HOLDING] = "HOLDING",
52 [PLINK_BLOCKED] = "BLOCKED"
53};
54
55static const char * const mplevent[] = {
56 [PLINK_UNDEFINED] = "UNDEFINED",
57 [OPN_ACPT] = "OPN_ACPT",
58 [OPN_RJCT] = "OPN_RJCT",
59 [OPN_IGNR] = "OPN_IGNR",
60 [CNF_ACPT] = "CNF_ACPT",
61 [CNF_RJCT] = "CNF_RJCT",
62 [CNF_IGNR] = "CNF_IGNR",
63 [CLS_ACPT] = "CLS_ACPT",
64 [CLS_IGNR] = "CLS_IGNR"
65};
66
67
68static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s,
69 u8 action_field,
70 const u8 *ie, size_t len,
71 struct mesh_peer_mgmt_ie *mpm_ie)
72{
73 os_memset(mpm_ie, 0, sizeof(*mpm_ie));
74
75 /* remove optional PMK at end */
76 if (len >= 16) {
77 len -= 16;
78 mpm_ie->pmk = ie + len - 16;
79 }
80
81 if ((action_field == PLINK_OPEN && len != 4) ||
82 (action_field == PLINK_CONFIRM && len != 6) ||
83 (action_field == PLINK_CLOSE && len != 6 && len != 8)) {
84 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie");
85 return -1;
86 }
87
88 /* required fields */
89 if (len < 4)
90 return -1;
91 mpm_ie->proto_id = ie;
92 mpm_ie->llid = ie + 2;
93 ie += 4;
94 len -= 4;
95
96 /* close reason is always present at end for close */
97 if (action_field == PLINK_CLOSE) {
98 if (len < 2)
99 return -1;
100 mpm_ie->reason = ie + len - 2;
101 len -= 2;
102 }
103
104 /* plid, present for confirm, and possibly close */
105 if (len)
106 mpm_ie->plid = ie;
107
108 return 0;
109}
110
111
112static int plink_free_count(struct hostapd_data *hapd)
113{
114 if (hapd->max_plinks > hapd->num_plinks)
115 return hapd->max_plinks - hapd->num_plinks;
116 return 0;
117}
118
119
120static u16 copy_supp_rates(struct wpa_supplicant *wpa_s,
121 struct sta_info *sta,
122 struct ieee802_11_elems *elems)
123{
124 if (!elems->supp_rates) {
125 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR,
126 MAC2STR(sta->addr));
127 return WLAN_STATUS_UNSPECIFIED_FAILURE;
128 }
129
130 if (elems->supp_rates_len + elems->ext_supp_rates_len >
131 sizeof(sta->supported_rates)) {
132 wpa_msg(wpa_s, MSG_ERROR,
133 "Invalid supported rates element length " MACSTR
134 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len,
135 elems->ext_supp_rates_len);
136 return WLAN_STATUS_UNSPECIFIED_FAILURE;
137 }
138
139 sta->supported_rates_len = merge_byte_arrays(
140 sta->supported_rates, sizeof(sta->supported_rates),
141 elems->supp_rates, elems->supp_rates_len,
142 elems->ext_supp_rates, elems->ext_supp_rates_len);
143
144 return WLAN_STATUS_SUCCESS;
145}
146
147
148/* return true if elems from a neighbor match this MBSS */
149static Boolean matches_local(struct wpa_supplicant *wpa_s,
150 struct ieee802_11_elems *elems)
151{
152 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
153
154 if (elems->mesh_config_len < 5)
155 return FALSE;
156
157 return (mconf->meshid_len == elems->mesh_id_len &&
158 os_memcmp(mconf->meshid, elems->mesh_id,
159 elems->mesh_id_len) == 0 &&
160 mconf->mesh_pp_id == elems->mesh_config[0] &&
161 mconf->mesh_pm_id == elems->mesh_config[1] &&
162 mconf->mesh_cc_id == elems->mesh_config[2] &&
163 mconf->mesh_sp_id == elems->mesh_config[3] &&
164 mconf->mesh_auth_id == elems->mesh_config[4]);
165}
166
167
168/* check if local link id is already used with another peer */
169static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid)
170{
171 struct sta_info *sta;
172 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
173
174 for (sta = hapd->sta_list; sta; sta = sta->next) {
175 if (sta->my_lid == llid)
176 return TRUE;
177 }
178
179 return FALSE;
180}
181
182
183/* generate an llid for a link and set to initial state */
184static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s,
185 struct sta_info *sta)
186{
187 u16 llid;
188
189 do {
190 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0)
191 continue;
192 } while (!llid || llid_in_use(wpa_s, llid));
193
194 sta->my_lid = llid;
195 sta->peer_lid = 0;
196 sta->plink_state = PLINK_LISTEN;
197}
198
199
200static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s,
201 struct sta_info *sta,
202 enum plink_action_field type,
203 u16 close_reason)
204{
205 struct wpabuf *buf;
206 struct hostapd_iface *ifmsh = wpa_s->ifmsh;
207 struct hostapd_data *bss = ifmsh->bss[0];
208 struct mesh_conf *conf = ifmsh->mconf;
209 u8 supp_rates[2 + 2 + 32];
5cfb672d
JM		 210#ifdef CONFIG_IEEE80211N
211 u8 ht_capa_oper[2 + 26 + 2 + 22];
212#endif /* CONFIG_IEEE80211N */
0f950df0 213 u8 *pos, *cat;
5f92659d
BC		 214 u8 ie_len, add_plid = 0;
215 int ret;
216 int ampe = conf->security & MESH_CONF_SEC_AMPE;
798b3182 217 size_t buf_len;
5f92659d
BC		 218
219 if (!sta)
220 return;
221
798b3182
MH		 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 &&
233 wpa_s->current_ssid->mesh_ht_mode > CHAN_NO_HT) {
234 buf_len += 2 + 26 + /* HT capabilities */
235 2 + 22; /* HT operation */
236 }
237#endif /* CONFIG_IEEE80211N */
238 buf = wpabuf_alloc(buf_len);
5f92659d
BC		 239 if (!buf)
240 return;
241
0f950df0 242 cat = wpabuf_mhead_u8(buf);
5f92659d
BC		 243 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED);
244 wpabuf_put_u8(buf, type);
245
246 if (type != PLINK_CLOSE) {
247 /* capability info */
248 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0);
249
5cfb672d 250 /* aid */
5f92659d
BC		 251 if (type == PLINK_CONFIRM)
252 wpabuf_put_le16(buf, sta->peer_lid);
253
254 /* IE: supp + ext. supp rates */
255 pos = hostapd_eid_supp_rates(bss, supp_rates);
256 pos = hostapd_eid_ext_supp_rates(bss, pos);
257 wpabuf_put_data(buf, supp_rates, pos - supp_rates);
258
259 /* IE: Mesh ID */
260 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
261 wpabuf_put_u8(buf, conf->meshid_len);
262 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
263
264 /* IE: mesh conf */
265 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG);
266 wpabuf_put_u8(buf, 7);
267 wpabuf_put_u8(buf, conf->mesh_pp_id);
268 wpabuf_put_u8(buf, conf->mesh_pm_id);
269 wpabuf_put_u8(buf, conf->mesh_cc_id);
270 wpabuf_put_u8(buf, conf->mesh_sp_id);
271 wpabuf_put_u8(buf, conf->mesh_auth_id);
272 /* TODO: formation info */
273 wpabuf_put_u8(buf, 0);
274 /* always forwarding & accepting plinks for now */
275 wpabuf_put_u8(buf, 0x1 | 0x8);
276 } else { /* Peer closing frame */
277 /* IE: Mesh ID */
278 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
279 wpabuf_put_u8(buf, conf->meshid_len);
280 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
281 }
282
283 /* IE: Mesh Peering Management element */
284 ie_len = 4;
285 if (ampe)
286 ie_len += PMKID_LEN;
287 switch (type) {
288 case PLINK_OPEN:
289 break;
290 case PLINK_CONFIRM:
291 ie_len += 2;
292 add_plid = 1;
293 break;
294 case PLINK_CLOSE:
295 ie_len += 2;
296 add_plid = 1;
297 ie_len += 2; /* reason code */
298 break;
299 }
300
301 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT);
302 wpabuf_put_u8(buf, ie_len);
303 /* peering protocol */
304 if (ampe)
305 wpabuf_put_le16(buf, 1);
306 else
307 wpabuf_put_le16(buf, 0);
308 wpabuf_put_le16(buf, sta->my_lid);
309 if (add_plid)
310 wpabuf_put_le16(buf, sta->peer_lid);
311 if (type == PLINK_CLOSE)
312 wpabuf_put_le16(buf, close_reason);
608b0ff5
JM		 313 if (ampe) {
314 if (sta->sae == NULL) {
315 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session");
316 goto fail;
317 }
0f950df0
TP		 318 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta,
319 wpabuf_put(buf, PMKID_LEN));
608b0ff5 320 }
5f92659d 321
5cfb672d
JM		 322#ifdef CONFIG_IEEE80211N
323 if (type != PLINK_CLOSE &&
9204e738 324 wpa_s->current_ssid->mesh_ht_mode > CHAN_NO_HT) {
5cfb672d
JM		 325 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper);
326 pos = hostapd_eid_ht_operation(bss, pos);
327 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper);
328 }
329#endif /* CONFIG_IEEE80211N */
5f92659d 330
0f950df0
TP		 331 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) {
332 wpa_msg(wpa_s, MSG_INFO,
333 "Mesh MPM: failed to add AMPE and MIC IE");
334 goto fail;
335 }
336
5f92659d
BC		 337 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0,
338 sta->addr, wpa_s->own_addr, wpa_s->own_addr,
339 wpabuf_head(buf), wpabuf_len(buf), 0);
340 if (ret < 0)
341 wpa_msg(wpa_s, MSG_INFO,
342 "Mesh MPM: failed to send peering frame");
343
0f950df0 344fail:
5f92659d
BC		 345 wpabuf_free(buf);
346}
347
348
349/* configure peering state in ours and driver's station entry */
350static void
351wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s, struct sta_info *sta,
352 enum mesh_plink_state state)
353{
354 struct hostapd_sta_add_params params;
355 int ret;
356
357 sta->plink_state = state;
358
359 os_memset(&params, 0, sizeof(params));
360 params.addr = sta->addr;
361 params.plink_state = state;
362 params.set = 1;
363
364 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " into %s",
365 MAC2STR(sta->addr), mplstate[state]);
366 ret = wpa_drv_sta_add(wpa_s, &params);
367 if (ret) {
368 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR
369 ": %d", MAC2STR(sta->addr), ret);
370 }
371}
372
373
374static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s,
375 struct sta_info *sta)
376{
377 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
378
379 eloop_cancel_timeout(plink_timer, wpa_s, sta);
380
381 if (sta->mpm_close_reason == WLAN_REASON_MESH_CLOSE_RCVD) {
382 ap_free_sta(hapd, sta);
383 return;
384 }
385
386 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_LISTEN);
387 sta->my_lid = sta->peer_lid = sta->mpm_close_reason = 0;
388 sta->mpm_retries = 0;
389}
390
391
392static void plink_timer(void *eloop_ctx, void *user_data)
393{
394 struct wpa_supplicant *wpa_s = eloop_ctx;
395 struct sta_info *sta = user_data;
396 u16 reason = 0;
e6096799 397 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
5f92659d
BC		 398
399 switch (sta->plink_state) {
400 case PLINK_OPEN_RCVD:
401 case PLINK_OPEN_SENT:
402 /* retry timer */
e6096799
MH		 403 if (sta->mpm_retries < conf->dot11MeshMaxRetries) {
404 eloop_register_timeout(
405 conf->dot11MeshRetryTimeout / 1000,
406 (conf->dot11MeshRetryTimeout % 1000) * 1000,
407 plink_timer, wpa_s, sta);
5f92659d
BC		 408 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
409 sta->mpm_retries++;
410 break;
411 }
412 reason = WLAN_REASON_MESH_MAX_RETRIES;
413 /* fall through on else */
414
415 case PLINK_CNF_RCVD:
416 /* confirm timer */
417 if (!reason)
418 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT;
419 sta->plink_state = PLINK_HOLDING;
e6096799
MH		 420 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000,
421 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
422 plink_timer, wpa_s, sta);
5f92659d
BC		 423 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
424 break;
425 case PLINK_HOLDING:
426 /* holding timer */
427 mesh_mpm_fsm_restart(wpa_s, sta);
428 break;
429 default:
430 break;
431 }
432}
433
434
435/* initiate peering with station */
436static void
437mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta,
438 enum mesh_plink_state next_state)
439{
e6096799
MH		 440 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
441
5f92659d 442 eloop_cancel_timeout(plink_timer, wpa_s, sta);
e6096799
MH		 443 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000,
444 (conf->dot11MeshRetryTimeout % 1000) * 1000,
445 plink_timer, wpa_s, sta);
5f92659d
BC		 446 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
447 wpa_mesh_set_plink_state(wpa_s, sta, next_state);
448}
449
450
451int mesh_mpm_plink_close(struct hostapd_data *hapd,
452 struct sta_info *sta, void *ctx)
453{
454 struct wpa_supplicant *wpa_s = ctx;
455 int reason = WLAN_REASON_MESH_PEERING_CANCELLED;
456
457 if (sta) {
458 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
459 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
460 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR,
461 MAC2STR(sta->addr));
462 eloop_cancel_timeout(plink_timer, wpa_s, sta);
463 return 0;
464 }
465
466 return 1;
467}
468
469
470void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh)
471{
472 struct hostapd_data *hapd = ifmsh->bss[0];
473
474 /* notify peers we're leaving */
475 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s);
476
477 hapd->num_plinks = 0;
478 hostapd_free_stas(hapd);
479}
480
481
482/* for mesh_rsn to indicate this peer has completed authentication, and we're
483 * ready to start AMPE */
484void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
485{
486 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
487 struct hostapd_sta_add_params params;
488 struct sta_info *sta;
489 int ret;
490
491 sta = ap_get_sta(data, addr);
492 if (!sta) {
493 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer");
494 return;
495 }
496
497 /* TODO: Should do nothing if this STA is already authenticated, but
498 * the AP code already sets this flag. */
499 sta->flags |= WLAN_STA_AUTH;
500
0f950df0
TP		 501 mesh_rsn_init_ampe_sta(wpa_s, sta);
502
5f92659d
BC		 503 os_memset(&params, 0, sizeof(params));
504 params.addr = sta->addr;
505 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED;
506 params.set = 1;
507
508 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR,
509 MAC2STR(sta->addr));
510 ret = wpa_drv_sta_add(wpa_s, &params);
511 if (ret) {
512 wpa_msg(wpa_s, MSG_ERROR,
513 "Driver failed to set " MACSTR ": %d",
514 MAC2STR(sta->addr), ret);
515 }
516
517 if (!sta->my_lid)
518 mesh_mpm_init_link(wpa_s, sta);
519
520 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_SENT);
521}
522
523
524void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
525 struct ieee802_11_elems *elems)
526{
527 struct hostapd_sta_add_params params;
528 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
529 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
530 struct sta_info *sta;
07cb45cc 531 struct wpa_ssid *ssid = wpa_s->current_ssid;
5f92659d
BC		 532 int ret = 0;
533
534 sta = ap_get_sta(data, addr);
535 if (!sta) {
536 sta = ap_sta_add(data, addr);
537 if (!sta)
538 return;
539 }
540
541 /* initialize sta */
542 if (copy_supp_rates(wpa_s, sta, elems))
543 return;
544
545 mesh_mpm_init_link(wpa_s, sta);
546
5cfb672d
JM		 547#ifdef CONFIG_IEEE80211N
548 copy_sta_ht_capab(data, sta, elems->ht_capabilities,
549 elems->ht_capabilities_len);
550 update_ht_state(data, sta);
551#endif /* CONFIG_IEEE80211N */
552
5f92659d
BC		 553 /* insert into driver */
554 os_memset(&params, 0, sizeof(params));
555 params.supp_rates = sta->supported_rates;
556 params.supp_rates_len = sta->supported_rates_len;
557 params.addr = addr;
558 params.plink_state = sta->plink_state;
559 params.aid = sta->peer_lid;
560 params.listen_interval = 100;
5cfb672d 561 params.ht_capabilities = sta->ht_capabilities;
5f92659d
BC		 562 params.flags |= WPA_STA_WMM;
563 params.flags_mask |= WPA_STA_AUTHENTICATED;
564 if (conf->security == MESH_CONF_SEC_NONE) {
565 params.flags |= WPA_STA_AUTHORIZED;
566 params.flags |= WPA_STA_AUTHENTICATED;
567 } else {
568 sta->flags |= WLAN_STA_MFP;
569 params.flags |= WPA_STA_MFP;
570 }
571
572 ret = wpa_drv_sta_add(wpa_s, &params);
573 if (ret) {
574 wpa_msg(wpa_s, MSG_ERROR,
575 "Driver failed to insert " MACSTR ": %d",
576 MAC2STR(addr), ret);
577 return;
578 }
579
07cb45cc
TP		 580 if (ssid && ssid->no_auto_peer) {
581 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with "
582 MACSTR " because of no_auto_peer", MAC2STR(addr));
583 return;
584 }
585
0f950df0
TP		 586 if (conf->security == MESH_CONF_SEC_NONE)
587 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_SENT);
588 else
589 mesh_rsn_auth_sae_sta(wpa_s, sta);
5f92659d
BC		 590}
591
592
593void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt)
594{
595 struct hostapd_frame_info fi;
596
597 os_memset(&fi, 0, sizeof(fi));
598 fi.datarate = rx_mgmt->datarate;
599 fi.ssi_signal = rx_mgmt->ssi_signal;
600 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame,
601 rx_mgmt->frame_len, &fi);
602}
603
604
605static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
606 struct sta_info *sta)
607{
608 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
0f950df0
TP		 609 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
610 u8 seq[6] = {};
5f92659d
BC		 611
612 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established",
613 MAC2STR(sta->addr));
614
0f950df0
TP		 615 if (conf->security & MESH_CONF_SEC_AMPE) {
616 wpa_drv_set_key(wpa_s, WPA_ALG_CCMP, sta->addr, 0, 0,
617 seq, sizeof(seq), sta->mtk, sizeof(sta->mtk));
618 wpa_drv_set_key(wpa_s, WPA_ALG_CCMP, sta->addr, 1, 0,
619 seq, sizeof(seq),
620 sta->mgtk, sizeof(sta->mgtk));
621 wpa_drv_set_key(wpa_s, WPA_ALG_IGTK, sta->addr, 4, 0,
622 seq, sizeof(seq),
623 sta->mgtk, sizeof(sta->mgtk));
624
625 wpa_hexdump_key(MSG_DEBUG, "mtk:", sta->mtk, sizeof(sta->mtk));
626 wpa_hexdump_key(MSG_DEBUG, "mgtk:",
627 sta->mgtk, sizeof(sta->mgtk));
628 }
629
5f92659d
BC		 630 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);
631 hapd->num_plinks++;
632
633 sta->flags |= WLAN_STA_ASSOC;
634
635 eloop_cancel_timeout(plink_timer, wpa_s, sta);
636
637 /* Send ctrl event */
638 wpa_msg_ctrl(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR,
639 MAC2STR(sta->addr));
640}
641
642
643static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
644 enum plink_event event)
645{
646 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
0f950df0 647 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
5f92659d
BC		 648 u16 reason = 0;
649
650 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s",
651 MAC2STR(sta->addr), mplstate[sta->plink_state],
652 mplevent[event]);
653
654 switch (sta->plink_state) {
655 case PLINK_LISTEN:
656 switch (event) {
657 case CLS_ACPT:
658 mesh_mpm_fsm_restart(wpa_s, sta);
659 break;
660 case OPN_ACPT:
661 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_RCVD);
662 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM,
663 0);
664 break;
665 default:
666 break;
667 }
668 break;
669 case PLINK_OPEN_SENT:
670 switch (event) {
671 case OPN_RJCT:
672 case CNF_RJCT:
673 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
674 /* fall-through */
675 case CLS_ACPT:
676 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
677 if (!reason)
678 reason = WLAN_REASON_MESH_CLOSE_RCVD;
e6096799
MH		 679 eloop_register_timeout(
680 conf->dot11MeshHoldingTimeout / 1000,
681 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
682 plink_timer, wpa_s, sta);
5f92659d
BC		 683 mesh_mpm_send_plink_action(wpa_s, sta,
684 PLINK_CLOSE, reason);
685 break;
686 case OPN_ACPT:
687 /* retry timer is left untouched */
688 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPEN_RCVD);
689 mesh_mpm_send_plink_action(wpa_s, sta,
690 PLINK_CONFIRM, 0);
691 break;
692 case CNF_ACPT:
693 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
e6096799
MH		 694 eloop_register_timeout(
695 conf->dot11MeshConfirmTimeout / 1000,
696 (conf->dot11MeshConfirmTimeout % 1000) * 1000,
697 plink_timer, wpa_s, sta);
5f92659d
BC		 698 break;
699 default:
700 break;
701 }
702 break;
703 case PLINK_OPEN_RCVD:
704 switch (event) {
705 case OPN_RJCT:
706 case CNF_RJCT:
707 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
708 /* fall-through */
709 case CLS_ACPT:
710 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
711 if (!reason)
712 reason = WLAN_REASON_MESH_CLOSE_RCVD;
e6096799
MH		 713 eloop_register_timeout(
714 conf->dot11MeshHoldingTimeout / 1000,
715 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
716 plink_timer, wpa_s, sta);
5f92659d
BC		 717 sta->mpm_close_reason = reason;
718 mesh_mpm_send_plink_action(wpa_s, sta,
719 PLINK_CLOSE, reason);
720 break;
721 case OPN_ACPT:
722 mesh_mpm_send_plink_action(wpa_s, sta,
723 PLINK_CONFIRM, 0);
724 break;
725 case CNF_ACPT:
0f950df0
TP		 726 if (conf->security & MESH_CONF_SEC_AMPE)
727 mesh_rsn_derive_mtk(wpa_s, sta);
5f92659d
BC		 728 mesh_mpm_plink_estab(wpa_s, sta);
729 break;
730 default:
731 break;
732 }
733 break;
734 case PLINK_CNF_RCVD:
735 switch (event) {
736 case OPN_RJCT:
737 case CNF_RJCT:
738 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
739 /* fall-through */
740 case CLS_ACPT:
741 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
742 if (!reason)
743 reason = WLAN_REASON_MESH_CLOSE_RCVD;
e6096799
MH		 744 eloop_register_timeout(
745 conf->dot11MeshHoldingTimeout / 1000,
746 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
747 plink_timer, wpa_s, sta);
5f92659d
BC		 748 sta->mpm_close_reason = reason;
749 mesh_mpm_send_plink_action(wpa_s, sta,
750 PLINK_CLOSE, reason);
751 break;
752 case OPN_ACPT:
753 mesh_mpm_plink_estab(wpa_s, sta);
754 mesh_mpm_send_plink_action(wpa_s, sta,
755 PLINK_CONFIRM, 0);
756 break;
757 default:
758 break;
759 }
760 break;
761 case PLINK_ESTAB:
762 switch (event) {
763 case CLS_ACPT:
764 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
765 reason = WLAN_REASON_MESH_CLOSE_RCVD;
766
e6096799
MH		 767 eloop_register_timeout(
768 conf->dot11MeshHoldingTimeout / 1000,
769 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
770 plink_timer, wpa_s, sta);
5f92659d
BC		 771 sta->mpm_close_reason = reason;
772
773 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR
774 " closed with reason %d",
775 MAC2STR(sta->addr), reason);
776
777 wpa_msg_ctrl(wpa_s, MSG_INFO,
778 MESH_PEER_DISCONNECTED MACSTR,
779 MAC2STR(sta->addr));
780
781 hapd->num_plinks--;
782
783 mesh_mpm_send_plink_action(wpa_s, sta,
784 PLINK_CLOSE, reason);
785 break;
786 case OPN_ACPT:
787 mesh_mpm_send_plink_action(wpa_s, sta,
788 PLINK_CONFIRM, 0);
789 break;
790 default:
791 break;
792 }
793 break;
794 case PLINK_HOLDING:
795 switch (event) {
796 case CLS_ACPT:
797 mesh_mpm_fsm_restart(wpa_s, sta);
798 break;
799 case OPN_ACPT:
800 case CNF_ACPT:
801 case OPN_RJCT:
802 case CNF_RJCT:
803 reason = sta->mpm_close_reason;
804 mesh_mpm_send_plink_action(wpa_s, sta,
805 PLINK_CLOSE, reason);
806 break;
807 default:
808 break;
809 }
810 break;
811 default:
812 wpa_msg(wpa_s, MSG_DEBUG,
813 "Unsupported MPM event %s for state %s",
814 mplevent[event], mplstate[sta->plink_state]);
815 break;
816 }
817}
818
819
820void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s,
821 const struct ieee80211_mgmt *mgmt, size_t len)
822{
823 u8 action_field;
824 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
0f950df0 825 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
5f92659d
BC		 826 struct sta_info *sta;
827 u16 plid = 0, llid = 0;
828 enum plink_event event;
829 struct ieee802_11_elems elems;
830 struct mesh_peer_mgmt_ie peer_mgmt_ie;
831 const u8 *ies;
832 size_t ie_len;
833 int ret;
834
835 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED)
836 return;
837
838 action_field = mgmt->u.action.u.slf_prot_action.action;
c932b43e
JM		 839 if (action_field != PLINK_OPEN &&
840 action_field != PLINK_CONFIRM &&
841 action_field != PLINK_CLOSE)
842 return;
5f92659d
BC		 843
844 ies = mgmt->u.action.u.slf_prot_action.variable;
845 ie_len = (const u8 *) mgmt + len -
846 mgmt->u.action.u.slf_prot_action.variable;
847
848 /* at least expect mesh id and peering mgmt */
c932b43e
JM		 849 if (ie_len < 2 + 2) {
850 wpa_printf(MSG_DEBUG,
851 "MPM: Ignore too short action frame %u ie_len %u",
852 action_field, (unsigned int) ie_len);
5f92659d 853 return;
c932b43e
JM		 854 }
855 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field);
5f92659d
BC		 856
857 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) {
c932b43e
JM		 858 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x",
859 WPA_GET_LE16(ies));
5f92659d
BC		 860 ies += 2; /* capability */
861 ie_len -= 2;
862 }
863 if (action_field == PLINK_CONFIRM) {
c932b43e 864 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", WPA_GET_LE16(ies));
5f92659d
BC		 865 ies += 2; /* aid */
866 ie_len -= 2;
867 }
868
869 /* check for mesh peering, mesh id and mesh config IEs */
c932b43e
JM		 870 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
871 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs");
5f92659d 872 return;
c932b43e
JM		 873 }
874 if (!elems.peer_mgmt) {
875 wpa_printf(MSG_DEBUG,
876 "MPM: No Mesh Peering Management element");
5f92659d 877 return;
c932b43e
JM		 878 }
879 if (action_field != PLINK_CLOSE) {
880 if (!elems.mesh_id || !elems.mesh_config) {
881 wpa_printf(MSG_DEBUG,
882 "MPM: No Mesh ID or Mesh Configuration element");
883 return;
884 }
5f92659d 885
c932b43e
JM		 886 if (!matches_local(wpa_s, &elems)) {
887 wpa_printf(MSG_DEBUG,
888 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS");
889 return;
890 }
891 }
5f92659d
BC		 892
893 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field,
894 elems.peer_mgmt,
895 elems.peer_mgmt_len,
896 &peer_mgmt_ie);
c932b43e
JM		 897 if (ret) {
898 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame");
5f92659d 899 return;
c932b43e 900 }
5f92659d
BC		 901
902 /* the sender's llid is our plid and vice-versa */
903 plid = WPA_GET_LE16(peer_mgmt_ie.llid);
904 if (peer_mgmt_ie.plid)
905 llid = WPA_GET_LE16(peer_mgmt_ie.plid);
c932b43e 906 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid);
5f92659d
BC		 907
908 sta = ap_get_sta(hapd, mgmt->sa);
c932b43e
JM		 909 if (!sta) {
910 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer");
5f92659d 911 return;
c932b43e 912 }
5f92659d 913
0f950df0
TP		 914#ifdef CONFIG_SAE
915 /* peer is in sae_accepted? */
c932b43e
JM		 916 if (sta->sae && sta->sae->state != SAE_ACCEPTED) {
917 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer");
0f950df0 918 return;
c932b43e 919 }
0f950df0
TP		 920#endif /* CONFIG_SAE */
921
5f92659d
BC		 922 if (!sta->my_lid)
923 mesh_mpm_init_link(wpa_s, sta);
924
c932b43e
JM		 925 if ((mconf->security & MESH_CONF_SEC_AMPE) &&
926 mesh_rsn_process_ampe(wpa_s, sta, &elems,
927 &mgmt->u.action.category,
928 ies, ie_len)) {
929 wpa_printf(MSG_DEBUG, "MPM: RSN process rejected frame");
930 return;
931 }
0f950df0 932
c932b43e
JM		 933 if (sta->plink_state == PLINK_BLOCKED) {
934 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED");
5f92659d 935 return;
c932b43e 936 }
5f92659d
BC		 937
938 /* Now we will figure out the appropriate event... */
939 switch (action_field) {
940 case PLINK_OPEN:
941 if (!plink_free_count(hapd) ||
942 (sta->peer_lid && sta->peer_lid != plid)) {
943 event = OPN_IGNR;
944 } else {
945 sta->peer_lid = plid;
946 event = OPN_ACPT;
947 }
948 break;
949 case PLINK_CONFIRM:
950 if (!plink_free_count(hapd) ||
951 sta->my_lid != llid ||
952 (sta->peer_lid && sta->peer_lid != plid)) {
953 event = CNF_IGNR;
954 } else {
955 if (!sta->peer_lid)
956 sta->peer_lid = plid;
957 event = CNF_ACPT;
958 }
959 break;
960 case PLINK_CLOSE:
961 if (sta->plink_state == PLINK_ESTAB)
962 /* Do not check for llid or plid. This does not
963 * follow the standard but since multiple plinks
964 * per cand are not supported, it is necessary in
965 * order to avoid a livelock when MP A sees an
966 * establish peer link to MP B but MP B does not
967 * see it. This can be caused by a timeout in
968 * B's peer link establishment or B being
969 * restarted.
970 */
971 event = CLS_ACPT;
972 else if (sta->peer_lid != plid)
973 event = CLS_IGNR;
974 else if (peer_mgmt_ie.plid && sta->my_lid != llid)
975 event = CLS_IGNR;
976 else
977 event = CLS_ACPT;
978 break;
763041b2
JM		 979 default:
980 /*
981 * This cannot be hit due to the action_field check above, but
982 * compilers may not be able to figure that out and can warn
983 * about uninitialized event below.
984 */
985 return;
5f92659d
BC		 986 }
987 mesh_mpm_fsm(wpa_s, sta, event);
988}
c596f3f0
CYY		 989
990
991/* called by ap_free_sta */
992void mesh_mpm_free_sta(struct sta_info *sta)
993{
994 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta);
995 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta);
996}
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