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 "ap/hostapd.h"
16 #include "ap/sta_info.h"
17 #include "ap/ieee802_11.h"
18 #include "ap/wpa_auth.h"
19 #include "wpa_supplicant_i.h"
20 #include "driver_i.h"
21 #include "mesh_mpm.h"
22 #include "mesh_rsn.h"
23
24 struct mesh_peer_mgmt_ie {
25 const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */
26 const u8 *llid; /* Local Link ID (2 octets) */
27 const u8 *plid; /* Peer Link ID (conditional, 2 octets) */
28 const u8 *reason; /* Reason Code (conditional, 2 octets) */
29 const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */
30 };
31
32 static void plink_timer(void *eloop_ctx, void *user_data);
33
34
35 enum plink_event {
36 PLINK_UNDEFINED,
37 OPN_ACPT,
38 OPN_RJCT,
39 CNF_ACPT,
40 CNF_RJCT,
41 CLS_ACPT,
42 REQ_RJCT
43 };
44
45 static const char * const mplstate[] = {
46 [0] = "UNINITIALIZED",
47 [PLINK_IDLE] = "IDLE",
48 [PLINK_OPN_SNT] = "OPN_SNT",
49 [PLINK_OPN_RCVD] = "OPN_RCVD",
50 [PLINK_CNF_RCVD] = "CNF_RCVD",
51 [PLINK_ESTAB] = "ESTAB",
52 [PLINK_HOLDING] = "HOLDING",
53 [PLINK_BLOCKED] = "BLOCKED"
54 };
55
56 static const char * const mplevent[] = {
57 [PLINK_UNDEFINED] = "UNDEFINED",
58 [OPN_ACPT] = "OPN_ACPT",
59 [OPN_RJCT] = "OPN_RJCT",
60 [CNF_ACPT] = "CNF_ACPT",
61 [CNF_RJCT] = "CNF_RJCT",
62 [CLS_ACPT] = "CLS_ACPT",
63 [REQ_RJCT] = "REQ_RJCT",
64 };
65
66
mesh_mpm_parse_peer_mgmt(struct wpa_supplicant * wpa_s,u8 action_field,const u8 * ie,size_t len,struct mesh_peer_mgmt_ie * mpm_ie)67 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s,
68 u8 action_field,
69 const u8 *ie, size_t len,
70 struct mesh_peer_mgmt_ie *mpm_ie)
71 {
72 os_memset(mpm_ie, 0, sizeof(*mpm_ie));
73
74 /* Remove optional Chosen PMK field at end */
75 if (len >= SAE_PMKID_LEN) {
76 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN;
77 len -= SAE_PMKID_LEN;
78 }
79
80 if ((action_field == PLINK_OPEN && len != 4) ||
81 (action_field == PLINK_CONFIRM && len != 6) ||
82 (action_field == PLINK_CLOSE && len != 6 && len != 8)) {
83 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie");
84 return -1;
85 }
86
87 /* required fields */
88 if (len < 4)
89 return -1;
90 mpm_ie->proto_id = ie;
91 mpm_ie->llid = ie + 2;
92 ie += 4;
93 len -= 4;
94
95 /* close reason is always present at end for close */
96 if (action_field == PLINK_CLOSE) {
97 if (len < 2)
98 return -1;
99 mpm_ie->reason = ie + len - 2;
100 len -= 2;
101 }
102
103 /* Peer Link ID, present for confirm, and possibly close */
104 if (len >= 2)
105 mpm_ie->plid = ie;
106
107 return 0;
108 }
109
110
plink_free_count(struct hostapd_data * hapd)111 static int plink_free_count(struct hostapd_data *hapd)
112 {
113 if (hapd->max_plinks > hapd->num_plinks)
114 return hapd->max_plinks - hapd->num_plinks;
115 return 0;
116 }
117
118
copy_supp_rates(struct wpa_supplicant * wpa_s,struct sta_info * sta,struct ieee802_11_elems * elems)119 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s,
120 struct sta_info *sta,
121 struct ieee802_11_elems *elems)
122 {
123 if (!elems->supp_rates) {
124 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR,
125 MAC2STR(sta->addr));
126 return WLAN_STATUS_UNSPECIFIED_FAILURE;
127 }
128
129 if (elems->supp_rates_len + elems->ext_supp_rates_len >
130 sizeof(sta->supported_rates)) {
131 wpa_msg(wpa_s, MSG_ERROR,
132 "Invalid supported rates element length " MACSTR
133 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len,
134 elems->ext_supp_rates_len);
135 return WLAN_STATUS_UNSPECIFIED_FAILURE;
136 }
137
138 sta->supported_rates_len = merge_byte_arrays(
139 sta->supported_rates, sizeof(sta->supported_rates),
140 elems->supp_rates, elems->supp_rates_len,
141 elems->ext_supp_rates, elems->ext_supp_rates_len);
142
143 return WLAN_STATUS_SUCCESS;
144 }
145
146
147 /* return true if elems from a neighbor match this MBSS */
matches_local(struct wpa_supplicant * wpa_s,struct ieee802_11_elems * elems)148 static Boolean matches_local(struct wpa_supplicant *wpa_s,
149 struct ieee802_11_elems *elems)
150 {
151 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
152
153 if (elems->mesh_config_len < 5)
154 return FALSE;
155
156 return (mconf->meshid_len == elems->mesh_id_len &&
157 os_memcmp(mconf->meshid, elems->mesh_id,
158 elems->mesh_id_len) == 0 &&
159 mconf->mesh_pp_id == elems->mesh_config[0] &&
160 mconf->mesh_pm_id == elems->mesh_config[1] &&
161 mconf->mesh_cc_id == elems->mesh_config[2] &&
162 mconf->mesh_sp_id == elems->mesh_config[3] &&
163 mconf->mesh_auth_id == elems->mesh_config[4]);
164 }
165
166
167 /* check if local link id is already used with another peer */
llid_in_use(struct wpa_supplicant * wpa_s,u16 llid)168 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid)
169 {
170 struct sta_info *sta;
171 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
172
173 for (sta = hapd->sta_list; sta; sta = sta->next) {
174 if (sta->my_lid == llid)
175 return TRUE;
176 }
177
178 return FALSE;
179 }
180
181
182 /* generate an llid for a link and set to initial state */
mesh_mpm_init_link(struct wpa_supplicant * wpa_s,struct sta_info * sta)183 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s,
184 struct sta_info *sta)
185 {
186 u16 llid;
187
188 do {
189 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0)
190 continue;
191 } while (!llid || llid_in_use(wpa_s, llid));
192
193 sta->my_lid = llid;
194 sta->peer_lid = 0;
195 sta->peer_aid = 0;
196
197 /*
198 * We do not use wpa_mesh_set_plink_state() here because there is no
199 * entry in kernel yet.
200 */
201 sta->plink_state = PLINK_IDLE;
202 }
203
204
mesh_mpm_send_plink_action(struct wpa_supplicant * wpa_s,struct sta_info * sta,enum plink_action_field type,u16 close_reason)205 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s,
206 struct sta_info *sta,
207 enum plink_action_field type,
208 u16 close_reason)
209 {
210 struct wpabuf *buf;
211 struct hostapd_iface *ifmsh = wpa_s->ifmsh;
212 struct hostapd_data *bss = ifmsh->bss[0];
213 struct mesh_conf *conf = ifmsh->mconf;
214 u8 supp_rates[2 + 2 + 32];
215 u8 *pos, *cat;
216 u8 ie_len, add_plid = 0;
217 int ret;
218 int ampe = conf->security & MESH_CONF_SEC_AMPE;
219 size_t buf_len;
220
221 if (!sta)
222 return;
223
224 buf_len = 2 + /* capability info */
225 2 + /* AID */
226 2 + 8 + /* supported rates */
227 2 + (32 - 8) +
228 2 + 32 + /* mesh ID */
229 2 + 7 + /* mesh config */
230 2 + 23 + /* peering management */
231 2 + 96 + /* AMPE */
232 2 + 16; /* MIC */
233 #ifdef CONFIG_IEEE80211N
234 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
235 buf_len += 2 + 26 + /* HT capabilities */
236 2 + 22; /* HT operation */
237 }
238 #endif /* CONFIG_IEEE80211N */
239 #ifdef CONFIG_IEEE80211AC
240 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
241 buf_len += 2 + 12 + /* VHT Capabilities */
242 2 + 5; /* VHT Operation */
243 }
244 #endif /* CONFIG_IEEE80211AC */
245 if (type != PLINK_CLOSE)
246 buf_len += conf->rsn_ie_len; /* RSN IE */
247
248 buf = wpabuf_alloc(buf_len);
249 if (!buf)
250 return;
251
252 cat = wpabuf_mhead_u8(buf);
253 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED);
254 wpabuf_put_u8(buf, type);
255
256 if (type != PLINK_CLOSE) {
257 u8 info;
258
259 /* capability info */
260 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0);
261
262 /* aid */
263 if (type == PLINK_CONFIRM)
264 wpabuf_put_le16(buf, sta->aid);
265
266 /* IE: supp + ext. supp rates */
267 pos = hostapd_eid_supp_rates(bss, supp_rates);
268 pos = hostapd_eid_ext_supp_rates(bss, pos);
269 wpabuf_put_data(buf, supp_rates, pos - supp_rates);
270
271 /* IE: RSN IE */
272 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len);
273
274 /* IE: Mesh ID */
275 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
276 wpabuf_put_u8(buf, conf->meshid_len);
277 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
278
279 /* IE: mesh conf */
280 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG);
281 wpabuf_put_u8(buf, 7);
282 wpabuf_put_u8(buf, conf->mesh_pp_id);
283 wpabuf_put_u8(buf, conf->mesh_pm_id);
284 wpabuf_put_u8(buf, conf->mesh_cc_id);
285 wpabuf_put_u8(buf, conf->mesh_sp_id);
286 wpabuf_put_u8(buf, conf->mesh_auth_id);
287 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1;
288 /* TODO: Add Connected to Mesh Gate/AS subfields */
289 wpabuf_put_u8(buf, info);
290 /* always forwarding & accepting plinks for now */
291 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER |
292 MESH_CAP_FORWARDING);
293 } else { /* Peer closing frame */
294 /* IE: Mesh ID */
295 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
296 wpabuf_put_u8(buf, conf->meshid_len);
297 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
298 }
299
300 /* IE: Mesh Peering Management element */
301 ie_len = 4;
302 if (ampe)
303 ie_len += PMKID_LEN;
304 switch (type) {
305 case PLINK_OPEN:
306 break;
307 case PLINK_CONFIRM:
308 ie_len += 2;
309 add_plid = 1;
310 break;
311 case PLINK_CLOSE:
312 ie_len += 2;
313 add_plid = 1;
314 ie_len += 2; /* reason code */
315 break;
316 }
317
318 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT);
319 wpabuf_put_u8(buf, ie_len);
320 /* peering protocol */
321 if (ampe)
322 wpabuf_put_le16(buf, 1);
323 else
324 wpabuf_put_le16(buf, 0);
325 wpabuf_put_le16(buf, sta->my_lid);
326 if (add_plid)
327 wpabuf_put_le16(buf, sta->peer_lid);
328 if (type == PLINK_CLOSE)
329 wpabuf_put_le16(buf, close_reason);
330 if (ampe) {
331 if (sta->sae == NULL) {
332 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session");
333 goto fail;
334 }
335 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta,
336 wpabuf_put(buf, PMKID_LEN));
337 }
338
339 #ifdef CONFIG_IEEE80211N
340 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
341 u8 ht_capa_oper[2 + 26 + 2 + 22];
342
343 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper);
344 pos = hostapd_eid_ht_operation(bss, pos);
345 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper);
346 }
347 #endif /* CONFIG_IEEE80211N */
348 #ifdef CONFIG_IEEE80211AC
349 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
350 u8 vht_capa_oper[2 + 12 + 2 + 5];
351
352 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0);
353 pos = hostapd_eid_vht_operation(bss, pos);
354 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper);
355 }
356 #endif /* CONFIG_IEEE80211AC */
357
358 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) {
359 wpa_msg(wpa_s, MSG_INFO,
360 "Mesh MPM: failed to add AMPE and MIC IE");
361 goto fail;
362 }
363
364 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to "
365 MACSTR " (my_lid=0x%x peer_lid=0x%x)",
366 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid);
367 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0,
368 sta->addr, wpa_s->own_addr, wpa_s->own_addr,
369 wpabuf_head(buf), wpabuf_len(buf), 0);
370 if (ret < 0)
371 wpa_msg(wpa_s, MSG_INFO,
372 "Mesh MPM: failed to send peering frame");
373
374 fail:
375 wpabuf_free(buf);
376 }
377
378
379 /* configure peering state in ours and driver's station entry */
wpa_mesh_set_plink_state(struct wpa_supplicant * wpa_s,struct sta_info * sta,enum mesh_plink_state state)380 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s,
381 struct sta_info *sta,
382 enum mesh_plink_state state)
383 {
384 struct hostapd_sta_add_params params;
385 int ret;
386
387 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s",
388 MAC2STR(sta->addr), mplstate[sta->plink_state],
389 mplstate[state]);
390 sta->plink_state = state;
391
392 os_memset(¶ms, 0, sizeof(params));
393 params.addr = sta->addr;
394 params.plink_state = state;
395 params.peer_aid = sta->peer_aid;
396 params.set = 1;
397
398 ret = wpa_drv_sta_add(wpa_s, ¶ms);
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
mesh_mpm_fsm_restart(struct wpa_supplicant * wpa_s,struct sta_info * sta)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
plink_timer(void * eloop_ctx,void * user_data)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_OPN_RCVD:
427 case PLINK_OPN_SNT:
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
mesh_mpm_plink_open(struct wpa_supplicant * wpa_s,struct sta_info * sta,enum mesh_plink_state next_state)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
mesh_mpm_plink_close(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)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
mesh_mpm_close_peer(struct wpa_supplicant * wpa_s,const u8 * addr)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
peer_add_timer(void * eloop_ctx,void * user_data)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
mesh_mpm_connect_peer(struct wpa_supplicant * wpa_s,const u8 * addr,int duration)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_OPN_SNT <= 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_OPN_SNT);
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
mesh_mpm_deinit(struct wpa_supplicant * wpa_s,struct hostapd_iface * ifmsh)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 */
mesh_mpm_auth_peer(struct wpa_supplicant * wpa_s,const u8 * addr)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(¶ms, 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, ¶ms);
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_OPN_SNT);
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 */
mesh_mpm_add_peer(struct wpa_supplicant * wpa_s,const u8 * addr,struct ieee802_11_elems * elems)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 #ifdef CONFIG_IEEE80211N
651 struct ieee80211_ht_operation *oper;
652 #endif /* CONFIG_IEEE80211N */
653 int ret;
654
655 if (elems->mesh_config_len >= 7 &&
656 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) {
657 wpa_msg(wpa_s, MSG_DEBUG,
658 "mesh: Ignore a crowded peer " MACSTR,
659 MAC2STR(addr));
660 return NULL;
661 }
662
663 sta = ap_get_sta(data, addr);
664 if (!sta) {
665 sta = ap_sta_add(data, addr);
666 if (!sta)
667 return NULL;
668 }
669
670 /* Set WMM by default since Mesh STAs are QoS STAs */
671 sta->flags |= WLAN_STA_WMM;
672
673 /* initialize sta */
674 if (copy_supp_rates(wpa_s, sta, elems)) {
675 ap_free_sta(data, sta);
676 return NULL;
677 }
678
679 if (!sta->my_lid)
680 mesh_mpm_init_link(wpa_s, sta);
681
682 #ifdef CONFIG_IEEE80211N
683 copy_sta_ht_capab(data, sta, elems->ht_capabilities);
684
685 oper = (struct ieee80211_ht_operation *) elems->ht_operation;
686 if (oper &&
687 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) &&
688 sta->ht_capabilities) {
689 wpa_msg(wpa_s, MSG_DEBUG, MACSTR
690 " does not support 40 MHz bandwidth",
691 MAC2STR(sta->addr));
692 set_disable_ht40(sta->ht_capabilities, 1);
693 }
694
695 update_ht_state(data, sta);
696 #endif /* CONFIG_IEEE80211N */
697
698 #ifdef CONFIG_IEEE80211AC
699 copy_sta_vht_capab(data, sta, elems->vht_capabilities);
700 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif);
701 #endif /* CONFIG_IEEE80211AC */
702
703 if (hostapd_get_aid(data, sta) < 0) {
704 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available");
705 ap_free_sta(data, sta);
706 return NULL;
707 }
708
709 /* insert into driver */
710 os_memset(¶ms, 0, sizeof(params));
711 params.supp_rates = sta->supported_rates;
712 params.supp_rates_len = sta->supported_rates_len;
713 params.addr = addr;
714 params.plink_state = sta->plink_state;
715 params.aid = sta->aid;
716 params.peer_aid = sta->peer_aid;
717 params.listen_interval = 100;
718 params.ht_capabilities = sta->ht_capabilities;
719 params.vht_capabilities = sta->vht_capabilities;
720 params.flags |= WPA_STA_WMM;
721 params.flags_mask |= WPA_STA_AUTHENTICATED;
722 if (conf->security == MESH_CONF_SEC_NONE) {
723 params.flags |= WPA_STA_AUTHORIZED;
724 params.flags |= WPA_STA_AUTHENTICATED;
725 } else {
726 sta->flags |= WLAN_STA_MFP;
727 params.flags |= WPA_STA_MFP;
728 }
729
730 ret = wpa_drv_sta_add(wpa_s, ¶ms);
731 if (ret) {
732 wpa_msg(wpa_s, MSG_ERROR,
733 "Driver failed to insert " MACSTR ": %d",
734 MAC2STR(addr), ret);
735 ap_free_sta(data, sta);
736 return NULL;
737 }
738
739 return sta;
740 }
741
742
wpa_mesh_new_mesh_peer(struct wpa_supplicant * wpa_s,const u8 * addr,struct ieee802_11_elems * elems)743 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
744 struct ieee802_11_elems *elems)
745 {
746 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
747 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
748 struct sta_info *sta;
749 struct wpa_ssid *ssid = wpa_s->current_ssid;
750
751 sta = mesh_mpm_add_peer(wpa_s, addr, elems);
752 if (!sta)
753 return;
754
755 if (ssid && ssid->no_auto_peer &&
756 (is_zero_ether_addr(data->mesh_required_peer) ||
757 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) {
758 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with "
759 MACSTR " because of no_auto_peer", MAC2STR(addr));
760 if (data->mesh_pending_auth) {
761 struct os_reltime age;
762 const struct ieee80211_mgmt *mgmt;
763 struct hostapd_frame_info fi;
764
765 mgmt = wpabuf_head(data->mesh_pending_auth);
766 os_reltime_age(&data->mesh_pending_auth_time, &age);
767 if (age.sec < 2 &&
768 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) {
769 wpa_printf(MSG_DEBUG,
770 "mesh: Process pending Authentication frame from %u.%06u seconds ago",
771 (unsigned int) age.sec,
772 (unsigned int) age.usec);
773 os_memset(&fi, 0, sizeof(fi));
774 ieee802_11_mgmt(
775 data,
776 wpabuf_head(data->mesh_pending_auth),
777 wpabuf_len(data->mesh_pending_auth),
778 &fi);
779 }
780 wpabuf_free(data->mesh_pending_auth);
781 data->mesh_pending_auth = NULL;
782 }
783 return;
784 }
785
786 if (conf->security == MESH_CONF_SEC_NONE) {
787 if (sta->plink_state < PLINK_OPN_SNT ||
788 sta->plink_state > PLINK_ESTAB)
789 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
790 } else {
791 mesh_rsn_auth_sae_sta(wpa_s, sta);
792 }
793 }
794
795
mesh_mpm_mgmt_rx(struct wpa_supplicant * wpa_s,struct rx_mgmt * rx_mgmt)796 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt)
797 {
798 struct hostapd_frame_info fi;
799
800 os_memset(&fi, 0, sizeof(fi));
801 fi.datarate = rx_mgmt->datarate;
802 fi.ssi_signal = rx_mgmt->ssi_signal;
803 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame,
804 rx_mgmt->frame_len, &fi);
805 }
806
807
mesh_mpm_plink_estab(struct wpa_supplicant * wpa_s,struct sta_info * sta)808 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
809 struct sta_info *sta)
810 {
811 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
812 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
813 u8 seq[6] = {};
814
815 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established",
816 MAC2STR(sta->addr));
817
818 if (conf->security & MESH_CONF_SEC_AMPE) {
819 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len);
820 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher),
821 sta->addr, 0, 0, seq, sizeof(seq),
822 sta->mtk, sta->mtk_len);
823
824 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC",
825 sta->mgtk_rsc, sizeof(sta->mgtk_rsc));
826 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK",
827 sta->mgtk, sta->mgtk_len);
828 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher),
829 sta->addr, sta->mgtk_key_id, 0,
830 sta->mgtk_rsc, sizeof(sta->mgtk_rsc),
831 sta->mgtk, sta->mgtk_len);
832
833 if (sta->igtk_len) {
834 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC",
835 sta->igtk_rsc, sizeof(sta->igtk_rsc));
836 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK",
837 sta->igtk, sta->igtk_len);
838 wpa_drv_set_key(
839 wpa_s,
840 wpa_cipher_to_alg(conf->mgmt_group_cipher),
841 sta->addr, sta->igtk_key_id, 0,
842 sta->igtk_rsc, sizeof(sta->igtk_rsc),
843 sta->igtk, sta->igtk_len);
844 }
845 }
846
847 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);
848 hapd->num_plinks++;
849
850 sta->flags |= WLAN_STA_ASSOC;
851 sta->mesh_sae_pmksa_caching = 0;
852
853 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
854 peer_add_timer(wpa_s, NULL);
855 eloop_cancel_timeout(plink_timer, wpa_s, sta);
856
857 /* Send ctrl event */
858 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR,
859 MAC2STR(sta->addr));
860 }
861
862
mesh_mpm_fsm(struct wpa_supplicant * wpa_s,struct sta_info * sta,enum plink_event event,u16 reason)863 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
864 enum plink_event event, u16 reason)
865 {
866 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
867 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
868
869 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s",
870 MAC2STR(sta->addr), mplstate[sta->plink_state],
871 mplevent[event]);
872
873 switch (sta->plink_state) {
874 case PLINK_IDLE:
875 switch (event) {
876 case CLS_ACPT:
877 mesh_mpm_fsm_restart(wpa_s, sta);
878 break;
879 case OPN_ACPT:
880 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD);
881 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM,
882 0);
883 break;
884 case REQ_RJCT:
885 mesh_mpm_send_plink_action(wpa_s, sta,
886 PLINK_CLOSE, reason);
887 break;
888 default:
889 break;
890 }
891 break;
892 case PLINK_OPN_SNT:
893 switch (event) {
894 case OPN_RJCT:
895 case CNF_RJCT:
896 if (!reason)
897 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
898 /* fall-through */
899 case CLS_ACPT:
900 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
901 if (!reason)
902 reason = WLAN_REASON_MESH_CLOSE_RCVD;
903 eloop_register_timeout(
904 conf->dot11MeshHoldingTimeout / 1000,
905 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
906 plink_timer, wpa_s, sta);
907 mesh_mpm_send_plink_action(wpa_s, sta,
908 PLINK_CLOSE, reason);
909 break;
910 case OPN_ACPT:
911 /* retry timer is left untouched */
912 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD);
913 mesh_mpm_send_plink_action(wpa_s, sta,
914 PLINK_CONFIRM, 0);
915 break;
916 case CNF_ACPT:
917 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
918 eloop_cancel_timeout(plink_timer, wpa_s, sta);
919 eloop_register_timeout(
920 conf->dot11MeshConfirmTimeout / 1000,
921 (conf->dot11MeshConfirmTimeout % 1000) * 1000,
922 plink_timer, wpa_s, sta);
923 break;
924 default:
925 break;
926 }
927 break;
928 case PLINK_OPN_RCVD:
929 switch (event) {
930 case OPN_RJCT:
931 case CNF_RJCT:
932 if (!reason)
933 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
934 /* fall-through */
935 case CLS_ACPT:
936 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
937 if (!reason)
938 reason = WLAN_REASON_MESH_CLOSE_RCVD;
939 eloop_register_timeout(
940 conf->dot11MeshHoldingTimeout / 1000,
941 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
942 plink_timer, wpa_s, sta);
943 sta->mpm_close_reason = reason;
944 mesh_mpm_send_plink_action(wpa_s, sta,
945 PLINK_CLOSE, reason);
946 break;
947 case OPN_ACPT:
948 mesh_mpm_send_plink_action(wpa_s, sta,
949 PLINK_CONFIRM, 0);
950 break;
951 case CNF_ACPT:
952 if (conf->security & MESH_CONF_SEC_AMPE)
953 mesh_rsn_derive_mtk(wpa_s, sta);
954 mesh_mpm_plink_estab(wpa_s, sta);
955 break;
956 default:
957 break;
958 }
959 break;
960 case PLINK_CNF_RCVD:
961 switch (event) {
962 case OPN_RJCT:
963 case CNF_RJCT:
964 if (!reason)
965 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
966 /* fall-through */
967 case CLS_ACPT:
968 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
969 if (!reason)
970 reason = WLAN_REASON_MESH_CLOSE_RCVD;
971 eloop_register_timeout(
972 conf->dot11MeshHoldingTimeout / 1000,
973 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
974 plink_timer, wpa_s, sta);
975 sta->mpm_close_reason = reason;
976 mesh_mpm_send_plink_action(wpa_s, sta,
977 PLINK_CLOSE, reason);
978 break;
979 case OPN_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 mesh_mpm_send_plink_action(wpa_s, sta,
984 PLINK_CONFIRM, 0);
985 break;
986 default:
987 break;
988 }
989 break;
990 case PLINK_ESTAB:
991 switch (event) {
992 case OPN_RJCT:
993 case CNF_RJCT:
994 case CLS_ACPT:
995 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
996 if (!reason)
997 reason = WLAN_REASON_MESH_CLOSE_RCVD;
998
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
1005 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR
1006 " closed with reason %d",
1007 MAC2STR(sta->addr), reason);
1008
1009 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR,
1010 MAC2STR(sta->addr));
1011
1012 hapd->num_plinks--;
1013
1014 mesh_mpm_send_plink_action(wpa_s, sta,
1015 PLINK_CLOSE, reason);
1016 break;
1017 case OPN_ACPT:
1018 mesh_mpm_send_plink_action(wpa_s, sta,
1019 PLINK_CONFIRM, 0);
1020 break;
1021 default:
1022 break;
1023 }
1024 break;
1025 case PLINK_HOLDING:
1026 switch (event) {
1027 case CLS_ACPT:
1028 mesh_mpm_fsm_restart(wpa_s, sta);
1029 break;
1030 case OPN_ACPT:
1031 case CNF_ACPT:
1032 case OPN_RJCT:
1033 case CNF_RJCT:
1034 reason = sta->mpm_close_reason;
1035 mesh_mpm_send_plink_action(wpa_s, sta,
1036 PLINK_CLOSE, reason);
1037 break;
1038 default:
1039 break;
1040 }
1041 break;
1042 default:
1043 wpa_msg(wpa_s, MSG_DEBUG,
1044 "Unsupported MPM event %s for state %s",
1045 mplevent[event], mplstate[sta->plink_state]);
1046 break;
1047 }
1048 }
1049
1050
mesh_mpm_action_rx(struct wpa_supplicant * wpa_s,const struct ieee80211_mgmt * mgmt,size_t len)1051 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s,
1052 const struct ieee80211_mgmt *mgmt, size_t len)
1053 {
1054 u8 action_field;
1055 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
1056 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
1057 struct sta_info *sta;
1058 u16 plid = 0, llid = 0, aid = 0;
1059 enum plink_event event;
1060 struct ieee802_11_elems elems;
1061 struct mesh_peer_mgmt_ie peer_mgmt_ie;
1062 const u8 *ies;
1063 size_t ie_len;
1064 int ret;
1065 u16 reason = 0;
1066
1067 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED)
1068 return;
1069
1070 action_field = mgmt->u.action.u.slf_prot_action.action;
1071 if (action_field != PLINK_OPEN &&
1072 action_field != PLINK_CONFIRM &&
1073 action_field != PLINK_CLOSE)
1074 return;
1075
1076 ies = mgmt->u.action.u.slf_prot_action.variable;
1077 ie_len = (const u8 *) mgmt + len -
1078 mgmt->u.action.u.slf_prot_action.variable;
1079
1080 /* at least expect mesh id and peering mgmt */
1081 if (ie_len < 2 + 2) {
1082 wpa_printf(MSG_DEBUG,
1083 "MPM: Ignore too short action frame %u ie_len %u",
1084 action_field, (unsigned int) ie_len);
1085 return;
1086 }
1087 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field);
1088
1089 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) {
1090 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x",
1091 WPA_GET_LE16(ies));
1092 ies += 2; /* capability */
1093 ie_len -= 2;
1094 }
1095 if (action_field == PLINK_CONFIRM) {
1096 aid = WPA_GET_LE16(ies);
1097 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid);
1098 ies += 2; /* aid */
1099 ie_len -= 2;
1100 }
1101
1102 /* check for mesh peering, mesh id and mesh config IEs */
1103 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
1104 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs");
1105 return;
1106 }
1107 if (!elems.peer_mgmt) {
1108 wpa_printf(MSG_DEBUG,
1109 "MPM: No Mesh Peering Management element");
1110 return;
1111 }
1112 if (action_field != PLINK_CLOSE) {
1113 if (!elems.mesh_id || !elems.mesh_config) {
1114 wpa_printf(MSG_DEBUG,
1115 "MPM: No Mesh ID or Mesh Configuration element");
1116 return;
1117 }
1118
1119 if (!matches_local(wpa_s, &elems)) {
1120 wpa_printf(MSG_DEBUG,
1121 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS");
1122 return;
1123 }
1124 }
1125
1126 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field,
1127 elems.peer_mgmt,
1128 elems.peer_mgmt_len,
1129 &peer_mgmt_ie);
1130 if (ret) {
1131 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame");
1132 return;
1133 }
1134
1135 /* the sender's llid is our plid and vice-versa */
1136 plid = WPA_GET_LE16(peer_mgmt_ie.llid);
1137 if (peer_mgmt_ie.plid)
1138 llid = WPA_GET_LE16(peer_mgmt_ie.plid);
1139 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid);
1140
1141 if (action_field == PLINK_CLOSE)
1142 wpa_printf(MSG_DEBUG, "MPM: close reason=%u",
1143 WPA_GET_LE16(peer_mgmt_ie.reason));
1144
1145 sta = ap_get_sta(hapd, mgmt->sa);
1146
1147 /*
1148 * If this is an open frame from an unknown STA, and this is an
1149 * open mesh, then go ahead and add the peer before proceeding.
1150 */
1151 if (!sta && action_field == PLINK_OPEN &&
1152 (!(mconf->security & MESH_CONF_SEC_AMPE) ||
1153 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL)))
1154 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems);
1155
1156 if (!sta) {
1157 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer");
1158 return;
1159 }
1160
1161 #ifdef CONFIG_SAE
1162 /* peer is in sae_accepted? */
1163 if (sta->sae && sta->sae->state != SAE_ACCEPTED) {
1164 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer");
1165 return;
1166 }
1167 #endif /* CONFIG_SAE */
1168
1169 if (!sta->my_lid)
1170 mesh_mpm_init_link(wpa_s, sta);
1171
1172 if (mconf->security & MESH_CONF_SEC_AMPE) {
1173 int res;
1174
1175 res = mesh_rsn_process_ampe(wpa_s, sta, &elems,
1176 &mgmt->u.action.category,
1177 peer_mgmt_ie.chosen_pmk,
1178 ies, ie_len);
1179 if (res) {
1180 wpa_printf(MSG_DEBUG,
1181 "MPM: RSN process rejected frame (res=%d)",
1182 res);
1183 if (action_field == PLINK_OPEN && res == -2) {
1184 /* AES-SIV decryption failed */
1185 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT,
1186 WLAN_REASON_MESH_INVALID_GTK);
1187 }
1188 return;
1189 }
1190 }
1191
1192 if (sta->plink_state == PLINK_BLOCKED) {
1193 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED");
1194 return;
1195 }
1196
1197 /* Now we will figure out the appropriate event... */
1198 switch (action_field) {
1199 case PLINK_OPEN:
1200 if (plink_free_count(hapd) == 0) {
1201 event = REQ_RJCT;
1202 reason = WLAN_REASON_MESH_MAX_PEERS;
1203 wpa_printf(MSG_INFO,
1204 "MPM: Peer link num over quota(%d)",
1205 hapd->max_plinks);
1206 } else if (sta->peer_lid && sta->peer_lid != plid) {
1207 wpa_printf(MSG_DEBUG,
1208 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1209 sta->peer_lid, plid);
1210 return; /* no FSM event */
1211 } else {
1212 sta->peer_lid = plid;
1213 event = OPN_ACPT;
1214 }
1215 break;
1216 case PLINK_CONFIRM:
1217 if (plink_free_count(hapd) == 0) {
1218 event = REQ_RJCT;
1219 reason = WLAN_REASON_MESH_MAX_PEERS;
1220 wpa_printf(MSG_INFO,
1221 "MPM: Peer link num over quota(%d)",
1222 hapd->max_plinks);
1223 } else if (sta->my_lid != llid ||
1224 (sta->peer_lid && sta->peer_lid != plid)) {
1225 wpa_printf(MSG_DEBUG,
1226 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x",
1227 sta->my_lid, llid, sta->peer_lid, plid);
1228 return; /* no FSM event */
1229 } else {
1230 if (!sta->peer_lid)
1231 sta->peer_lid = plid;
1232 sta->peer_aid = aid;
1233 event = CNF_ACPT;
1234 }
1235 break;
1236 case PLINK_CLOSE:
1237 if (sta->plink_state == PLINK_ESTAB)
1238 /* Do not check for llid or plid. This does not
1239 * follow the standard but since multiple plinks
1240 * per cand are not supported, it is necessary in
1241 * order to avoid a livelock when MP A sees an
1242 * establish peer link to MP B but MP B does not
1243 * see it. This can be caused by a timeout in
1244 * B's peer link establishment or B being
1245 * restarted.
1246 */
1247 event = CLS_ACPT;
1248 else if (sta->peer_lid != plid) {
1249 wpa_printf(MSG_DEBUG,
1250 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1251 sta->peer_lid, plid);
1252 return; /* no FSM event */
1253 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) {
1254 wpa_printf(MSG_DEBUG,
1255 "MPM: my_lid mismatch: 0x%x != 0x%x",
1256 sta->my_lid, llid);
1257 return; /* no FSM event */
1258 } else {
1259 event = CLS_ACPT;
1260 }
1261 break;
1262 default:
1263 /*
1264 * This cannot be hit due to the action_field check above, but
1265 * compilers may not be able to figure that out and can warn
1266 * about uninitialized event below.
1267 */
1268 return;
1269 }
1270 mesh_mpm_fsm(wpa_s, sta, event, reason);
1271 }
1272
1273
1274 /* called by ap_free_sta */
mesh_mpm_free_sta(struct hostapd_data * hapd,struct sta_info * sta)1275 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
1276 {
1277 if (sta->plink_state == PLINK_ESTAB)
1278 hapd->num_plinks--;
1279 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta);
1280 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta);
1281 }
1282