1 /*
2 * WPA Supplicant - Basic mesh peer management
3 * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/hw_features_common.h"
15 #include "common/ocv.h"
16 #include "ap/hostapd.h"
17 #include "ap/sta_info.h"
18 #include "ap/ieee802_11.h"
19 #include "ap/wpa_auth.h"
20 #include "wpa_supplicant_i.h"
21 #include "driver_i.h"
22 #include "mesh_mpm.h"
23 #include "mesh_rsn.h"
24 #include "notify.h"
25
26 struct mesh_peer_mgmt_ie {
27 const u8 *proto_id; /* Mesh Peering Protocol Identifier (2 octets) */
28 const u8 *llid; /* Local Link ID (2 octets) */
29 const u8 *plid; /* Peer Link ID (conditional, 2 octets) */
30 const u8 *reason; /* Reason Code (conditional, 2 octets) */
31 const u8 *chosen_pmk; /* Chosen PMK (optional, 16 octets) */
32 };
33
34 static void plink_timer(void *eloop_ctx, void *user_data);
35
36
37 enum plink_event {
38 PLINK_UNDEFINED,
39 OPN_ACPT,
40 OPN_RJCT,
41 CNF_ACPT,
42 CNF_RJCT,
43 CLS_ACPT,
44 REQ_RJCT
45 };
46
47 static const char * const mplstate[] = {
48 [0] = "UNINITIALIZED",
49 [PLINK_IDLE] = "IDLE",
50 [PLINK_OPN_SNT] = "OPN_SNT",
51 [PLINK_OPN_RCVD] = "OPN_RCVD",
52 [PLINK_CNF_RCVD] = "CNF_RCVD",
53 [PLINK_ESTAB] = "ESTAB",
54 [PLINK_HOLDING] = "HOLDING",
55 [PLINK_BLOCKED] = "BLOCKED"
56 };
57
58 static const char * const mplevent[] = {
59 [PLINK_UNDEFINED] = "UNDEFINED",
60 [OPN_ACPT] = "OPN_ACPT",
61 [OPN_RJCT] = "OPN_RJCT",
62 [CNF_ACPT] = "CNF_ACPT",
63 [CNF_RJCT] = "CNF_RJCT",
64 [CLS_ACPT] = "CLS_ACPT",
65 [REQ_RJCT] = "REQ_RJCT",
66 };
67
68
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)69 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s,
70 u8 action_field,
71 const u8 *ie, size_t len,
72 struct mesh_peer_mgmt_ie *mpm_ie)
73 {
74 os_memset(mpm_ie, 0, sizeof(*mpm_ie));
75
76 /* Remove optional Chosen PMK field at end */
77 if (len >= SAE_PMKID_LEN) {
78 mpm_ie->chosen_pmk = ie + len - SAE_PMKID_LEN;
79 len -= SAE_PMKID_LEN;
80 }
81
82 if ((action_field == PLINK_OPEN && len != 4) ||
83 (action_field == PLINK_CONFIRM && len != 6) ||
84 (action_field == PLINK_CLOSE && len != 6 && len != 8)) {
85 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie");
86 return -1;
87 }
88
89 /* required fields */
90 if (len < 4)
91 return -1;
92 mpm_ie->proto_id = ie;
93 mpm_ie->llid = ie + 2;
94 ie += 4;
95 len -= 4;
96
97 /* close reason is always present at end for close */
98 if (action_field == PLINK_CLOSE) {
99 if (len < 2)
100 return -1;
101 mpm_ie->reason = ie + len - 2;
102 len -= 2;
103 }
104
105 /* Peer Link ID, present for confirm, and possibly close */
106 if (len >= 2)
107 mpm_ie->plid = ie;
108
109 return 0;
110 }
111
112
plink_free_count(struct hostapd_data * hapd)113 static int plink_free_count(struct hostapd_data *hapd)
114 {
115 if (hapd->max_plinks > hapd->num_plinks)
116 return hapd->max_plinks - hapd->num_plinks;
117 return 0;
118 }
119
120
copy_supp_rates(struct wpa_supplicant * wpa_s,struct sta_info * sta,struct ieee802_11_elems * elems)121 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s,
122 struct sta_info *sta,
123 struct ieee802_11_elems *elems)
124 {
125 if (!elems->supp_rates) {
126 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR,
127 MAC2STR(sta->addr));
128 return WLAN_STATUS_UNSPECIFIED_FAILURE;
129 }
130
131 if (elems->supp_rates_len + elems->ext_supp_rates_len >
132 sizeof(sta->supported_rates)) {
133 wpa_msg(wpa_s, MSG_ERROR,
134 "Invalid supported rates element length " MACSTR
135 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len,
136 elems->ext_supp_rates_len);
137 return WLAN_STATUS_UNSPECIFIED_FAILURE;
138 }
139
140 sta->supported_rates_len = merge_byte_arrays(
141 sta->supported_rates, sizeof(sta->supported_rates),
142 elems->supp_rates, elems->supp_rates_len,
143 elems->ext_supp_rates, elems->ext_supp_rates_len);
144
145 return WLAN_STATUS_SUCCESS;
146 }
147
148
149 /* return true if elems from a neighbor match this MBSS */
matches_local(struct wpa_supplicant * wpa_s,struct ieee802_11_elems * elems)150 static bool matches_local(struct wpa_supplicant *wpa_s,
151 struct ieee802_11_elems *elems)
152 {
153 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
154
155 if (elems->mesh_config_len < 5)
156 return false;
157
158 return (mconf->meshid_len == elems->mesh_id_len &&
159 os_memcmp(mconf->meshid, elems->mesh_id,
160 elems->mesh_id_len) == 0 &&
161 mconf->mesh_pp_id == elems->mesh_config[0] &&
162 mconf->mesh_pm_id == elems->mesh_config[1] &&
163 mconf->mesh_cc_id == elems->mesh_config[2] &&
164 mconf->mesh_sp_id == elems->mesh_config[3] &&
165 mconf->mesh_auth_id == elems->mesh_config[4]);
166 }
167
168
169 /* check if local link id is already used with another peer */
llid_in_use(struct wpa_supplicant * wpa_s,u16 llid)170 static bool llid_in_use(struct wpa_supplicant *wpa_s, u16 llid)
171 {
172 struct sta_info *sta;
173 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
174
175 for (sta = hapd->sta_list; sta; sta = sta->next) {
176 if (sta->my_lid == llid)
177 return true;
178 }
179
180 return false;
181 }
182
183
184 /* generate an llid for a link and set to initial state */
mesh_mpm_init_link(struct wpa_supplicant * wpa_s,struct sta_info * sta)185 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s,
186 struct sta_info *sta)
187 {
188 u16 llid;
189
190 do {
191 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0)
192 llid = 0; /* continue */
193 } while (!llid || llid_in_use(wpa_s, llid));
194
195 sta->my_lid = llid;
196 sta->peer_lid = 0;
197 sta->peer_aid = 0;
198
199 /*
200 * We do not use wpa_mesh_set_plink_state() here because there is no
201 * entry in kernel yet.
202 */
203 sta->plink_state = PLINK_IDLE;
204 }
205
206
mesh_mpm_send_plink_action(struct wpa_supplicant * wpa_s,struct sta_info * sta,enum plink_action_field type,u16 close_reason)207 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s,
208 struct sta_info *sta,
209 enum plink_action_field type,
210 u16 close_reason)
211 {
212 struct wpabuf *buf;
213 struct hostapd_iface *ifmsh = wpa_s->ifmsh;
214 struct hostapd_data *bss = ifmsh->bss[0];
215 struct mesh_conf *conf = ifmsh->mconf;
216 u8 supp_rates[2 + 2 + 32];
217 u8 *pos, *cat;
218 u8 ie_len, add_plid = 0;
219 int ret;
220 int ampe = conf->security & MESH_CONF_SEC_AMPE;
221 size_t buf_len;
222
223 if (!sta)
224 return;
225
226 buf_len = 2 + /* Category and Action */
227 2 + /* capability info */
228 2 + /* AID */
229 2 + 8 + /* supported rates */
230 2 + (32 - 8) +
231 2 + 32 + /* mesh ID */
232 2 + 7 + /* mesh config */
233 2 + 24 + /* peering management */
234 2 + 96 + 32 + 32 + /* AMPE (96 + max GTKlen + max IGTKlen) */
235 2 + 16; /* MIC */
236 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
237 buf_len += 2 + 26 + /* HT capabilities */
238 2 + 22; /* HT operation */
239 }
240 #ifdef CONFIG_IEEE80211AC
241 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
242 buf_len += 2 + 12 + /* VHT Capabilities */
243 2 + 5; /* VHT Operation */
244 }
245 #endif /* CONFIG_IEEE80211AC */
246 #ifdef CONFIG_IEEE80211AX
247 if (type != PLINK_CLOSE && wpa_s->mesh_he_enabled) {
248 buf_len += 3 +
249 HE_MAX_MAC_CAPAB_SIZE +
250 HE_MAX_PHY_CAPAB_SIZE +
251 HE_MAX_MCS_CAPAB_SIZE +
252 HE_MAX_PPET_CAPAB_SIZE;
253 buf_len += 3 + sizeof(struct ieee80211_he_operation);
254 if (is_6ghz_op_class(bss->iconf->op_class))
255 buf_len += sizeof(struct ieee80211_he_6ghz_oper_info) +
256 3 + sizeof(struct ieee80211_he_6ghz_band_cap);
257 }
258 #endif /* CONFIG_IEEE80211AX */
259 if (type != PLINK_CLOSE)
260 buf_len += conf->rsn_ie_len; /* RSN IE */
261 #ifdef CONFIG_OCV
262 /* OCI is included even when the other STA doesn't support OCV */
263 if (type != PLINK_CLOSE && conf->ocv)
264 buf_len += OCV_OCI_EXTENDED_LEN;
265 #endif /* CONFIG_OCV */
266
267 buf = wpabuf_alloc(buf_len);
268 if (!buf)
269 return;
270
271 cat = wpabuf_mhead_u8(buf);
272 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED);
273 wpabuf_put_u8(buf, type);
274
275 if (type != PLINK_CLOSE) {
276 u8 info;
277
278 /* capability info */
279 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0);
280
281 /* aid */
282 if (type == PLINK_CONFIRM)
283 wpabuf_put_le16(buf, sta->aid);
284
285 /* IE: supp + ext. supp rates */
286 pos = hostapd_eid_supp_rates(bss, supp_rates);
287 pos = hostapd_eid_ext_supp_rates(bss, pos);
288 wpabuf_put_data(buf, supp_rates, pos - supp_rates);
289
290 /* IE: RSN IE */
291 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len);
292
293 /* IE: Mesh ID */
294 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
295 wpabuf_put_u8(buf, conf->meshid_len);
296 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
297
298 /* IE: mesh conf */
299 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG);
300 wpabuf_put_u8(buf, 7);
301 wpabuf_put_u8(buf, conf->mesh_pp_id);
302 wpabuf_put_u8(buf, conf->mesh_pm_id);
303 wpabuf_put_u8(buf, conf->mesh_cc_id);
304 wpabuf_put_u8(buf, conf->mesh_sp_id);
305 wpabuf_put_u8(buf, conf->mesh_auth_id);
306 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1;
307 /* TODO: Add Connected to Mesh Gate/AS subfields */
308 wpabuf_put_u8(buf, info);
309 /* Set forwarding based on configuration and always accept
310 * plinks for now */
311 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER |
312 (conf->mesh_fwding ? MESH_CAP_FORWARDING : 0));
313 } else { /* Peer closing frame */
314 /* IE: Mesh ID */
315 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
316 wpabuf_put_u8(buf, conf->meshid_len);
317 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
318 }
319
320 /* IE: Mesh Peering Management element */
321 ie_len = 4;
322 if (ampe)
323 ie_len += PMKID_LEN;
324 switch (type) {
325 case PLINK_OPEN:
326 break;
327 case PLINK_CONFIRM:
328 ie_len += 2;
329 add_plid = 1;
330 break;
331 case PLINK_CLOSE:
332 ie_len += 2;
333 add_plid = 1;
334 ie_len += 2; /* reason code */
335 break;
336 }
337
338 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT);
339 wpabuf_put_u8(buf, ie_len);
340 /* peering protocol */
341 if (ampe)
342 wpabuf_put_le16(buf, 1);
343 else
344 wpabuf_put_le16(buf, 0);
345 wpabuf_put_le16(buf, sta->my_lid);
346 if (add_plid)
347 wpabuf_put_le16(buf, sta->peer_lid);
348 if (type == PLINK_CLOSE)
349 wpabuf_put_le16(buf, close_reason);
350 if (ampe) {
351 if (sta->sae == NULL) {
352 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session");
353 goto fail;
354 }
355 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta,
356 wpabuf_put(buf, PMKID_LEN));
357 }
358
359 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
360 u8 ht_capa_oper[2 + 26 + 2 + 22];
361
362 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper);
363 pos = hostapd_eid_ht_operation(bss, pos);
364 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper);
365 }
366 #ifdef CONFIG_IEEE80211AC
367 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
368 u8 vht_capa_oper[2 + 12 + 2 + 5];
369
370 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0);
371 pos = hostapd_eid_vht_operation(bss, pos);
372 wpabuf_put_data(buf, vht_capa_oper, pos - vht_capa_oper);
373 }
374 #endif /* CONFIG_IEEE80211AC */
375 #ifdef CONFIG_IEEE80211AX
376 if (type != PLINK_CLOSE && wpa_s->mesh_he_enabled) {
377 u8 he_capa_oper[3 +
378 HE_MAX_MAC_CAPAB_SIZE +
379 HE_MAX_PHY_CAPAB_SIZE +
380 HE_MAX_MCS_CAPAB_SIZE +
381 HE_MAX_PPET_CAPAB_SIZE +
382 3 + sizeof(struct ieee80211_he_operation) +
383 sizeof(struct ieee80211_he_6ghz_oper_info) +
384 3 + sizeof(struct ieee80211_he_6ghz_band_cap)];
385
386 pos = hostapd_eid_he_capab(bss, he_capa_oper,
387 IEEE80211_MODE_MESH);
388 pos = hostapd_eid_he_operation(bss, pos);
389 pos = hostapd_eid_he_6ghz_band_cap(bss, pos);
390 wpabuf_put_data(buf, he_capa_oper, pos - he_capa_oper);
391 }
392 #endif /* CONFIG_IEEE80211AX */
393
394 #ifdef CONFIG_OCV
395 if (type != PLINK_CLOSE && conf->ocv) {
396 struct wpa_channel_info ci;
397
398 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
399 wpa_printf(MSG_WARNING,
400 "Mesh MPM: Failed to get channel info for OCI element");
401 goto fail;
402 }
403
404 pos = wpabuf_put(buf, OCV_OCI_EXTENDED_LEN);
405 if (ocv_insert_extended_oci(&ci, pos) < 0)
406 goto fail;
407 }
408 #endif /* CONFIG_OCV */
409
410 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) {
411 wpa_msg(wpa_s, MSG_INFO,
412 "Mesh MPM: failed to add AMPE and MIC IE");
413 goto fail;
414 }
415
416 wpa_msg(wpa_s, MSG_DEBUG, "Mesh MPM: Sending peering frame type %d to "
417 MACSTR " (my_lid=0x%x peer_lid=0x%x)",
418 type, MAC2STR(sta->addr), sta->my_lid, sta->peer_lid);
419 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0,
420 sta->addr, wpa_s->own_addr, wpa_s->own_addr,
421 wpabuf_head(buf), wpabuf_len(buf), 0);
422 if (ret < 0)
423 wpa_msg(wpa_s, MSG_INFO,
424 "Mesh MPM: failed to send peering frame");
425
426 fail:
427 wpabuf_free(buf);
428 }
429
430
431 /* 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)432 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s,
433 struct sta_info *sta,
434 enum mesh_plink_state state)
435 {
436 struct hostapd_sta_add_params params;
437 int ret;
438
439 wpa_msg_only_for_cb(wpa_s, MSG_DEBUG, "MPM set " MACSTR " from %s into %s",
440 MAC2STR(sta->addr), mplstate[sta->plink_state],
441 mplstate[state]);
442 wpa_printf(MSG_DEBUG, "MPM set " MACSTR_SEC " from %s into %s",
443 MAC2STR_SEC(sta->addr), mplstate[sta->plink_state],
444 mplstate[state]);
445 sta->plink_state = state;
446
447 os_memset(¶ms, 0, sizeof(params));
448 params.addr = sta->addr;
449 params.plink_state = state;
450 params.peer_aid = sta->peer_aid;
451 params.set = 1;
452
453 ret = wpa_drv_sta_add(wpa_s, ¶ms);
454 if (ret) {
455 wpa_msg_only_for_cb(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR
456 ": %d", MAC2STR(sta->addr), ret);
457 wpa_printf(MSG_DEBUG, "Driver failed to set " MACSTR_SEC
458 ": %d", MAC2STR_SEC(sta->addr), ret);
459 }
460 }
461
462
mesh_mpm_fsm_restart(struct wpa_supplicant * wpa_s,struct sta_info * sta)463 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s,
464 struct sta_info *sta)
465 {
466 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
467
468 eloop_cancel_timeout(plink_timer, wpa_s, sta);
469
470 ap_free_sta(hapd, sta);
471 }
472
473
plink_timer(void * eloop_ctx,void * user_data)474 static void plink_timer(void *eloop_ctx, void *user_data)
475 {
476 struct wpa_supplicant *wpa_s = eloop_ctx;
477 struct sta_info *sta = user_data;
478 u16 reason = 0;
479 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
480 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
481
482 switch (sta->plink_state) {
483 case PLINK_OPN_RCVD:
484 case PLINK_OPN_SNT:
485 /* retry timer */
486 if (sta->mpm_retries < conf->dot11MeshMaxRetries) {
487 eloop_register_timeout(
488 conf->dot11MeshRetryTimeout / 1000,
489 (conf->dot11MeshRetryTimeout % 1000) * 1000,
490 plink_timer, wpa_s, sta);
491 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
492 sta->mpm_retries++;
493 break;
494 }
495 reason = WLAN_REASON_MESH_MAX_RETRIES;
496 /* fall through */
497
498 case PLINK_CNF_RCVD:
499 /* confirm timer */
500 if (!reason)
501 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT;
502 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
503 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000,
504 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
505 plink_timer, wpa_s, sta);
506 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
507 break;
508 case PLINK_HOLDING:
509 /* holding timer */
510
511 if (sta->mesh_sae_pmksa_caching) {
512 wpa_printf(MSG_DEBUG, "MPM: Peer " MACSTR_SEC
513 " looks like it does not support mesh SAE PMKSA caching, so remove the cached entry for it",
514 MAC2STR_SEC(sta->addr));
515 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
516 }
517 mesh_mpm_fsm_restart(wpa_s, sta);
518 break;
519 default:
520 break;
521 }
522 }
523
524
525 /* initiate peering with station */
526 static void
mesh_mpm_plink_open(struct wpa_supplicant * wpa_s,struct sta_info * sta,enum mesh_plink_state next_state)527 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta,
528 enum mesh_plink_state next_state)
529 {
530 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
531
532 eloop_cancel_timeout(plink_timer, wpa_s, sta);
533 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000,
534 (conf->dot11MeshRetryTimeout % 1000) * 1000,
535 plink_timer, wpa_s, sta);
536 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
537 wpa_mesh_set_plink_state(wpa_s, sta, next_state);
538 }
539
540
mesh_mpm_plink_close(struct hostapd_data * hapd,struct sta_info * sta,void * ctx)541 static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta,
542 void *ctx)
543 {
544 struct wpa_supplicant *wpa_s = ctx;
545 int reason = WLAN_REASON_MESH_PEERING_CANCELLED;
546
547 if (sta) {
548 if (sta->plink_state == PLINK_ESTAB)
549 hapd->num_plinks--;
550 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
551 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
552 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR_SEC,
553 MAC2STR_SEC(sta->addr));
554 eloop_cancel_timeout(plink_timer, wpa_s, sta);
555 eloop_cancel_timeout(mesh_auth_timer, wpa_s, sta);
556 return 0;
557 }
558
559 return 1;
560 }
561
562
mesh_mpm_close_peer(struct wpa_supplicant * wpa_s,const u8 * addr)563 int mesh_mpm_close_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
564 {
565 struct hostapd_data *hapd;
566 struct sta_info *sta;
567
568 if (!wpa_s->ifmsh) {
569 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet");
570 return -1;
571 }
572
573 hapd = wpa_s->ifmsh->bss[0];
574 sta = ap_get_sta(hapd, addr);
575 if (!sta) {
576 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer");
577 return -1;
578 }
579
580 return mesh_mpm_plink_close(hapd, sta, wpa_s) == 0 ? 0 : -1;
581 }
582
583
peer_add_timer(void * eloop_ctx,void * user_data)584 static void peer_add_timer(void *eloop_ctx, void *user_data)
585 {
586 struct wpa_supplicant *wpa_s = eloop_ctx;
587 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
588
589 os_memset(hapd->mesh_required_peer, 0, ETH_ALEN);
590 }
591
592
mesh_mpm_connect_peer(struct wpa_supplicant * wpa_s,const u8 * addr,int duration)593 int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
594 int duration)
595 {
596 struct wpa_ssid *ssid = wpa_s->current_ssid;
597 struct hostapd_data *hapd;
598 struct sta_info *sta;
599 struct mesh_conf *conf;
600
601 if (!wpa_s->ifmsh) {
602 wpa_msg(wpa_s, MSG_INFO, "Mesh is not prepared yet");
603 return -1;
604 }
605
606 if (!ssid || !ssid->no_auto_peer) {
607 wpa_msg(wpa_s, MSG_INFO,
608 "This command is available only with no_auto_peer mesh network");
609 return -1;
610 }
611
612 hapd = wpa_s->ifmsh->bss[0];
613 conf = wpa_s->ifmsh->mconf;
614
615 sta = ap_get_sta(hapd, addr);
616 if (!sta) {
617 wpa_msg(wpa_s, MSG_INFO, "No such mesh peer");
618 return -1;
619 }
620
621 if ((PLINK_OPN_SNT <= sta->plink_state &&
622 sta->plink_state <= PLINK_ESTAB) ||
623 (sta->sae && sta->sae->state > SAE_NOTHING)) {
624 wpa_msg(wpa_s, MSG_INFO,
625 "Specified peer is connecting/connected");
626 return -1;
627 }
628
629 if (conf->security == MESH_CONF_SEC_NONE) {
630 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
631 } else {
632 mesh_rsn_auth_sae_sta(wpa_s, sta);
633 os_memcpy(hapd->mesh_required_peer, addr, ETH_ALEN);
634 eloop_register_timeout(duration == -1 ? 10 : duration, 0,
635 peer_add_timer, wpa_s, NULL);
636 }
637
638 return 0;
639 }
640
641
mesh_mpm_deinit(struct wpa_supplicant * wpa_s,struct hostapd_iface * ifmsh)642 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh)
643 {
644 struct hostapd_data *hapd = ifmsh->bss[0];
645
646 /* notify peers we're leaving */
647 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s);
648
649 hapd->num_plinks = 0;
650 hostapd_free_stas(hapd);
651 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
652 }
653
654
655 /* for mesh_rsn to indicate this peer has completed authentication, and we're
656 * ready to start AMPE */
mesh_mpm_auth_peer(struct wpa_supplicant * wpa_s,const u8 * addr)657 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
658 {
659 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
660 struct hostapd_sta_add_params params;
661 struct sta_info *sta;
662 int ret;
663
664 sta = ap_get_sta(data, addr);
665 if (!sta) {
666 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer");
667 return;
668 }
669
670 /* TODO: Should do nothing if this STA is already authenticated, but
671 * the AP code already sets this flag. */
672 sta->flags |= WLAN_STA_AUTH;
673
674 mesh_rsn_init_ampe_sta(wpa_s, sta);
675
676 os_memset(¶ms, 0, sizeof(params));
677 params.addr = sta->addr;
678 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED;
679 params.set = 1;
680
681 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR,
682 MAC2STR(sta->addr));
683 ret = wpa_drv_sta_add(wpa_s, ¶ms);
684 if (ret) {
685 wpa_msg_only_for_cb(wpa_s, MSG_ERROR,
686 "Driver failed to set " MACSTR ": %d",
687 MAC2STR(sta->addr), ret);
688 wpa_printf(MSG_ERROR, "Driver failed to set " MACSTR_SEC ": %d",
689 MAC2STR_SEC(sta->addr), ret);
690 }
691
692 if (!sta->my_lid)
693 mesh_mpm_init_link(wpa_s, sta);
694
695 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
696 }
697
698 /*
699 * Initialize a sta_info structure for a peer and upload it into the driver
700 * in preparation for beginning authentication or peering. This is done when a
701 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is
702 * received from the peer for the first time.
703 */
mesh_mpm_add_peer(struct wpa_supplicant * wpa_s,const u8 * addr,struct ieee802_11_elems * elems)704 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s,
705 const u8 *addr,
706 struct ieee802_11_elems *elems)
707 {
708 struct hostapd_sta_add_params params;
709 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
710 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
711 struct sta_info *sta;
712 struct ieee80211_ht_operation *oper;
713 int ret;
714
715 if (elems->mesh_config_len >= 7 &&
716 !(elems->mesh_config[6] & MESH_CAP_ACCEPT_ADDITIONAL_PEER)) {
717 wpa_msg_only_for_cb(wpa_s, MSG_DEBUG,
718 "mesh: Ignore a crowded peer " MACSTR,
719 MAC2STR(addr));
720 wpa_printf(MSG_ERROR, "mesh: Ignore a crowded peer " MACSTR_SEC,
721 MAC2STR_SEC(addr));
722 return NULL;
723 }
724
725 sta = ap_get_sta(data, addr);
726 if (sta)
727 return NULL;
728
729 sta = ap_sta_add(data, addr);
730 if (!sta)
731 return NULL;
732
733 /* Set WMM by default since Mesh STAs are QoS STAs */
734 sta->flags |= WLAN_STA_WMM;
735
736 /* initialize sta */
737 if (copy_supp_rates(wpa_s, sta, elems)) {
738 ap_free_sta(data, sta);
739 return NULL;
740 }
741
742 if (!sta->my_lid)
743 mesh_mpm_init_link(wpa_s, sta);
744
745 copy_sta_ht_capab(data, sta, elems->ht_capabilities);
746
747 oper = (struct ieee80211_ht_operation *) elems->ht_operation;
748 if (oper &&
749 !(oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) &&
750 sta->ht_capabilities) {
751 wpa_msg(wpa_s, MSG_DEBUG, MACSTR
752 " does not support 40 MHz bandwidth",
753 MAC2STR(sta->addr));
754 set_disable_ht40(sta->ht_capabilities, 1);
755 }
756
757 update_ht_state(data, sta);
758
759 #ifdef CONFIG_IEEE80211AC
760 copy_sta_vht_capab(data, sta, elems->vht_capabilities);
761 copy_sta_vht_oper(data, sta, elems->vht_operation);
762 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif);
763 #endif /* CONFIG_IEEE80211AC */
764
765 #ifdef CONFIG_IEEE80211AX
766 copy_sta_he_capab(data, sta, IEEE80211_MODE_MESH,
767 elems->he_capabilities, elems->he_capabilities_len);
768 copy_sta_he_6ghz_capab(data, sta, elems->he_6ghz_band_cap);
769 #endif /* CONFIG_IEEE80211AX */
770
771 if (hostapd_get_aid(data, sta) < 0) {
772 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available");
773 ap_free_sta(data, sta);
774 return NULL;
775 }
776
777 /* insert into driver */
778 os_memset(¶ms, 0, sizeof(params));
779 params.supp_rates = sta->supported_rates;
780 params.supp_rates_len = sta->supported_rates_len;
781 params.addr = addr;
782 params.plink_state = sta->plink_state;
783 params.aid = sta->aid;
784 params.peer_aid = sta->peer_aid;
785 params.listen_interval = 100;
786 params.ht_capabilities = sta->ht_capabilities;
787 params.vht_capabilities = sta->vht_capabilities;
788 params.he_capab = sta->he_capab;
789 params.he_capab_len = sta->he_capab_len;
790 params.he_6ghz_capab = sta->he_6ghz_capab;
791 params.flags |= WPA_STA_WMM;
792 params.flags_mask |= WPA_STA_AUTHENTICATED;
793 if (conf->security == MESH_CONF_SEC_NONE) {
794 params.flags |= WPA_STA_AUTHORIZED;
795 params.flags |= WPA_STA_AUTHENTICATED;
796 } else {
797 sta->flags |= WLAN_STA_MFP;
798 params.flags |= WPA_STA_MFP;
799 }
800
801 ret = wpa_drv_sta_add(wpa_s, ¶ms);
802 if (ret) {
803 wpa_msg_only_for_cb(wpa_s, MSG_ERROR,
804 "Driver failed to insert " MACSTR ": %d",
805 MAC2STR(addr), ret);
806 wpa_printf(MSG_ERROR, "Driver failed to insert " MACSTR_SEC ": %d",
807 MAC2STR_SEC(addr), ret);
808 ap_free_sta(data, sta);
809 return NULL;
810 }
811
812 return sta;
813 }
814
815
wpa_mesh_new_mesh_peer(struct wpa_supplicant * wpa_s,const u8 * addr,struct ieee802_11_elems * elems)816 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
817 struct ieee802_11_elems *elems)
818 {
819 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
820 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
821 struct sta_info *sta;
822 struct wpa_ssid *ssid = wpa_s->current_ssid;
823
824 sta = mesh_mpm_add_peer(wpa_s, addr, elems);
825 if (!sta)
826 return;
827
828 if (ssid && ssid->no_auto_peer &&
829 (is_zero_ether_addr(data->mesh_required_peer) ||
830 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) {
831 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with "
832 MACSTR " because of no_auto_peer", MAC2STR(addr));
833 if (data->mesh_pending_auth) {
834 struct os_reltime age;
835 const struct ieee80211_mgmt *mgmt;
836 struct hostapd_frame_info fi;
837
838 mgmt = wpabuf_head(data->mesh_pending_auth);
839 os_reltime_age(&data->mesh_pending_auth_time, &age);
840 if (age.sec < 2 &&
841 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) {
842 wpa_printf(MSG_DEBUG,
843 "mesh: Process pending Authentication frame from %u.%06u seconds ago",
844 (unsigned int) age.sec,
845 (unsigned int) age.usec);
846 os_memset(&fi, 0, sizeof(fi));
847 ieee802_11_mgmt(
848 data,
849 wpabuf_head(data->mesh_pending_auth),
850 wpabuf_len(data->mesh_pending_auth),
851 &fi);
852 }
853 wpabuf_free(data->mesh_pending_auth);
854 data->mesh_pending_auth = NULL;
855 }
856 return;
857 }
858
859 if (conf->security == MESH_CONF_SEC_NONE) {
860 if (sta->plink_state < PLINK_OPN_SNT ||
861 sta->plink_state > PLINK_ESTAB)
862 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
863 } else {
864 mesh_rsn_auth_sae_sta(wpa_s, sta);
865 }
866 }
867
868
mesh_mpm_mgmt_rx(struct wpa_supplicant * wpa_s,struct rx_mgmt * rx_mgmt)869 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt)
870 {
871 struct hostapd_frame_info fi;
872
873 os_memset(&fi, 0, sizeof(fi));
874 fi.datarate = rx_mgmt->datarate;
875 fi.ssi_signal = rx_mgmt->ssi_signal;
876 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame,
877 rx_mgmt->frame_len, &fi);
878 }
879
880
mesh_mpm_plink_estab(struct wpa_supplicant * wpa_s,struct sta_info * sta)881 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
882 struct sta_info *sta)
883 {
884 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
885 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
886 u8 seq[6] = {};
887
888 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established",
889 MAC2STR(sta->addr));
890
891 if (conf->security & MESH_CONF_SEC_AMPE) {
892 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len);
893 wpa_drv_set_key(wpa_s,
894 #ifdef CONFIG_MLD_PATCH
895 -1,
896 #endif
897 wpa_cipher_to_alg(conf->pairwise_cipher),
898 sta->addr, 0, 0, seq, sizeof(seq),
899 sta->mtk, sta->mtk_len,
900 KEY_FLAG_PAIRWISE_RX_TX);
901
902 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC",
903 sta->mgtk_rsc, sizeof(sta->mgtk_rsc));
904 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK",
905 sta->mgtk, sta->mgtk_len);
906 wpa_drv_set_key(wpa_s,
907 #ifdef CONFIG_MLD_PATCH
908 -1,
909 #endif
910 wpa_cipher_to_alg(conf->group_cipher),
911 sta->addr, sta->mgtk_key_id, 0,
912 sta->mgtk_rsc, sizeof(sta->mgtk_rsc),
913 sta->mgtk, sta->mgtk_len,
914 KEY_FLAG_GROUP_RX);
915
916 if (sta->igtk_len) {
917 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC",
918 sta->igtk_rsc, sizeof(sta->igtk_rsc));
919 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK",
920 sta->igtk, sta->igtk_len);
921 wpa_drv_set_key(
922 wpa_s,
923 #ifdef CONFIG_MLD_PATCH
924 -1,
925 #endif
926 wpa_cipher_to_alg(conf->mgmt_group_cipher),
927 sta->addr, sta->igtk_key_id, 0,
928 sta->igtk_rsc, sizeof(sta->igtk_rsc),
929 sta->igtk, sta->igtk_len,
930 KEY_FLAG_GROUP_RX);
931 }
932 }
933
934 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);
935 hapd->num_plinks++;
936
937 sta->flags |= WLAN_STA_ASSOC;
938 sta->mesh_sae_pmksa_caching = 0;
939
940 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
941 peer_add_timer(wpa_s, NULL);
942 eloop_cancel_timeout(plink_timer, wpa_s, sta);
943
944 /* Send ctrl event */
945 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR,
946 MAC2STR(sta->addr));
947
948 /* Send D-Bus event */
949 wpas_notify_mesh_peer_connected(wpa_s, sta->addr);
950 }
951
952
mesh_mpm_fsm(struct wpa_supplicant * wpa_s,struct sta_info * sta,enum plink_event event,u16 reason)953 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
954 enum plink_event event, u16 reason)
955 {
956 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
957 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
958
959 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s",
960 MAC2STR(sta->addr), mplstate[sta->plink_state],
961 mplevent[event]);
962
963 switch (sta->plink_state) {
964 case PLINK_IDLE:
965 switch (event) {
966 case CLS_ACPT:
967 mesh_mpm_fsm_restart(wpa_s, sta);
968 break;
969 case OPN_ACPT:
970 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD);
971 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM,
972 0);
973 break;
974 case REQ_RJCT:
975 mesh_mpm_send_plink_action(wpa_s, sta,
976 PLINK_CLOSE, reason);
977 break;
978 default:
979 break;
980 }
981 break;
982 case PLINK_OPN_SNT:
983 switch (event) {
984 case OPN_RJCT:
985 case CNF_RJCT:
986 if (!reason)
987 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
988 /* fall-through */
989 case CLS_ACPT:
990 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
991 if (!reason)
992 reason = WLAN_REASON_MESH_CLOSE_RCVD;
993 eloop_register_timeout(
994 conf->dot11MeshHoldingTimeout / 1000,
995 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
996 plink_timer, wpa_s, sta);
997 mesh_mpm_send_plink_action(wpa_s, sta,
998 PLINK_CLOSE, reason);
999 break;
1000 case OPN_ACPT:
1001 /* retry timer is left untouched */
1002 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD);
1003 mesh_mpm_send_plink_action(wpa_s, sta,
1004 PLINK_CONFIRM, 0);
1005 break;
1006 case CNF_ACPT:
1007 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
1008 eloop_cancel_timeout(plink_timer, wpa_s, sta);
1009 eloop_register_timeout(
1010 conf->dot11MeshConfirmTimeout / 1000,
1011 (conf->dot11MeshConfirmTimeout % 1000) * 1000,
1012 plink_timer, wpa_s, sta);
1013 break;
1014 default:
1015 break;
1016 }
1017 break;
1018 case PLINK_OPN_RCVD:
1019 switch (event) {
1020 case OPN_RJCT:
1021 case CNF_RJCT:
1022 if (!reason)
1023 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
1024 /* fall-through */
1025 case CLS_ACPT:
1026 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
1027 if (!reason)
1028 reason = WLAN_REASON_MESH_CLOSE_RCVD;
1029 eloop_register_timeout(
1030 conf->dot11MeshHoldingTimeout / 1000,
1031 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
1032 plink_timer, wpa_s, sta);
1033 sta->mpm_close_reason = reason;
1034 mesh_mpm_send_plink_action(wpa_s, sta,
1035 PLINK_CLOSE, reason);
1036 break;
1037 case OPN_ACPT:
1038 mesh_mpm_send_plink_action(wpa_s, sta,
1039 PLINK_CONFIRM, 0);
1040 break;
1041 case CNF_ACPT:
1042 if (conf->security & MESH_CONF_SEC_AMPE)
1043 mesh_rsn_derive_mtk(wpa_s, sta);
1044 mesh_mpm_plink_estab(wpa_s, sta);
1045 break;
1046 default:
1047 break;
1048 }
1049 break;
1050 case PLINK_CNF_RCVD:
1051 switch (event) {
1052 case OPN_RJCT:
1053 case CNF_RJCT:
1054 if (!reason)
1055 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
1056 /* fall-through */
1057 case CLS_ACPT:
1058 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
1059 if (!reason)
1060 reason = WLAN_REASON_MESH_CLOSE_RCVD;
1061 eloop_register_timeout(
1062 conf->dot11MeshHoldingTimeout / 1000,
1063 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
1064 plink_timer, wpa_s, sta);
1065 sta->mpm_close_reason = reason;
1066 mesh_mpm_send_plink_action(wpa_s, sta,
1067 PLINK_CLOSE, reason);
1068 break;
1069 case OPN_ACPT:
1070 if (conf->security & MESH_CONF_SEC_AMPE)
1071 mesh_rsn_derive_mtk(wpa_s, sta);
1072 mesh_mpm_plink_estab(wpa_s, sta);
1073 mesh_mpm_send_plink_action(wpa_s, sta,
1074 PLINK_CONFIRM, 0);
1075 break;
1076 default:
1077 break;
1078 }
1079 break;
1080 case PLINK_ESTAB:
1081 switch (event) {
1082 case OPN_RJCT:
1083 case CNF_RJCT:
1084 case CLS_ACPT:
1085 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
1086 if (!reason)
1087 reason = WLAN_REASON_MESH_CLOSE_RCVD;
1088
1089 eloop_register_timeout(
1090 conf->dot11MeshHoldingTimeout / 1000,
1091 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
1092 plink_timer, wpa_s, sta);
1093 sta->mpm_close_reason = reason;
1094
1095 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR
1096 " closed with reason %d",
1097 MAC2STR(sta->addr), reason);
1098
1099 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR,
1100 MAC2STR(sta->addr));
1101
1102 /* Send D-Bus event */
1103 wpas_notify_mesh_peer_disconnected(wpa_s, sta->addr,
1104 reason);
1105
1106 hapd->num_plinks--;
1107
1108 mesh_mpm_send_plink_action(wpa_s, sta,
1109 PLINK_CLOSE, reason);
1110 break;
1111 case OPN_ACPT:
1112 mesh_mpm_send_plink_action(wpa_s, sta,
1113 PLINK_CONFIRM, 0);
1114 break;
1115 default:
1116 break;
1117 }
1118 break;
1119 case PLINK_HOLDING:
1120 switch (event) {
1121 case CLS_ACPT:
1122 mesh_mpm_fsm_restart(wpa_s, sta);
1123 break;
1124 case OPN_ACPT:
1125 case CNF_ACPT:
1126 case OPN_RJCT:
1127 case CNF_RJCT:
1128 reason = sta->mpm_close_reason;
1129 mesh_mpm_send_plink_action(wpa_s, sta,
1130 PLINK_CLOSE, reason);
1131 break;
1132 default:
1133 break;
1134 }
1135 break;
1136 default:
1137 wpa_msg(wpa_s, MSG_DEBUG,
1138 "Unsupported MPM event %s for state %s",
1139 mplevent[event], mplstate[sta->plink_state]);
1140 break;
1141 }
1142 }
1143
1144
mesh_mpm_action_rx(struct wpa_supplicant * wpa_s,const struct ieee80211_mgmt * mgmt,size_t len)1145 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s,
1146 const struct ieee80211_mgmt *mgmt, size_t len)
1147 {
1148 u8 action_field;
1149 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
1150 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
1151 struct sta_info *sta;
1152 u16 plid = 0, llid = 0, aid = 0;
1153 enum plink_event event;
1154 struct ieee802_11_elems elems;
1155 struct mesh_peer_mgmt_ie peer_mgmt_ie;
1156 const u8 *ies;
1157 size_t ie_len;
1158 int ret;
1159 u16 reason = 0;
1160
1161 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED)
1162 return;
1163
1164 action_field = mgmt->u.action.u.slf_prot_action.action;
1165 if (action_field != PLINK_OPEN &&
1166 action_field != PLINK_CONFIRM &&
1167 action_field != PLINK_CLOSE)
1168 return;
1169
1170 ies = mgmt->u.action.u.slf_prot_action.variable;
1171 ie_len = (const u8 *) mgmt + len -
1172 mgmt->u.action.u.slf_prot_action.variable;
1173
1174 /* at least expect mesh id and peering mgmt */
1175 if (ie_len < 2 + 2) {
1176 wpa_printf(MSG_DEBUG,
1177 "MPM: Ignore too short action frame %u ie_len %u",
1178 action_field, (unsigned int) ie_len);
1179 return;
1180 }
1181 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field);
1182
1183 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) {
1184 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x",
1185 WPA_GET_LE16(ies));
1186 ies += 2; /* capability */
1187 ie_len -= 2;
1188 }
1189 if (action_field == PLINK_CONFIRM) {
1190 aid = WPA_GET_LE16(ies);
1191 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid);
1192 ies += 2; /* aid */
1193 ie_len -= 2;
1194 }
1195
1196 /* check for mesh peering, mesh id and mesh config IEs */
1197 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
1198 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs");
1199 return;
1200 }
1201 if (!elems.peer_mgmt) {
1202 wpa_printf(MSG_DEBUG,
1203 "MPM: No Mesh Peering Management element");
1204 return;
1205 }
1206 if (action_field != PLINK_CLOSE) {
1207 if (!elems.mesh_id || !elems.mesh_config) {
1208 wpa_printf(MSG_DEBUG,
1209 "MPM: No Mesh ID or Mesh Configuration element");
1210 return;
1211 }
1212
1213 if (!matches_local(wpa_s, &elems)) {
1214 wpa_printf(MSG_DEBUG,
1215 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS");
1216 return;
1217 }
1218 }
1219
1220 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field,
1221 elems.peer_mgmt,
1222 elems.peer_mgmt_len,
1223 &peer_mgmt_ie);
1224 if (ret) {
1225 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame");
1226 return;
1227 }
1228
1229 /* the sender's llid is our plid and vice-versa */
1230 plid = WPA_GET_LE16(peer_mgmt_ie.llid);
1231 if (peer_mgmt_ie.plid)
1232 llid = WPA_GET_LE16(peer_mgmt_ie.plid);
1233 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid);
1234
1235 if (action_field == PLINK_CLOSE)
1236 wpa_printf(MSG_DEBUG, "MPM: close reason=%u",
1237 WPA_GET_LE16(peer_mgmt_ie.reason));
1238
1239 sta = ap_get_sta(hapd, mgmt->sa);
1240
1241 /*
1242 * If this is an open frame from an unknown STA, and this is an
1243 * open mesh, then go ahead and add the peer before proceeding.
1244 */
1245 if (!sta && action_field == PLINK_OPEN &&
1246 (!(mconf->security & MESH_CONF_SEC_AMPE) ||
1247 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL)))
1248 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems);
1249
1250 if (!sta) {
1251 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer");
1252 return;
1253 }
1254
1255 #ifdef CONFIG_SAE
1256 /* peer is in sae_accepted? */
1257 if (sta->sae && sta->sae->state != SAE_ACCEPTED) {
1258 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer");
1259 return;
1260 }
1261 #endif /* CONFIG_SAE */
1262
1263 if (!sta->my_lid)
1264 mesh_mpm_init_link(wpa_s, sta);
1265
1266 if (mconf->security & MESH_CONF_SEC_AMPE) {
1267 int res;
1268
1269 res = mesh_rsn_process_ampe(wpa_s, sta, &elems,
1270 &mgmt->u.action.category,
1271 peer_mgmt_ie.chosen_pmk,
1272 ies, ie_len);
1273 if (res) {
1274 wpa_printf(MSG_DEBUG,
1275 "MPM: RSN process rejected frame (res=%d)",
1276 res);
1277 if (action_field == PLINK_OPEN && res == -2) {
1278 /* AES-SIV decryption failed */
1279 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT,
1280 WLAN_REASON_MESH_INVALID_GTK);
1281 }
1282 return;
1283 }
1284
1285 #ifdef CONFIG_OCV
1286 if (action_field == PLINK_OPEN && elems.rsn_ie) {
1287 struct wpa_state_machine *sm = sta->wpa_sm;
1288 struct wpa_ie_data data;
1289
1290 res = wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2,
1291 elems.rsn_ie_len + 2,
1292 &data);
1293 if (res) {
1294 wpa_printf(MSG_DEBUG,
1295 "Failed to parse RSN IE (res=%d)",
1296 res);
1297 wpa_hexdump(MSG_DEBUG, "RSN IE", elems.rsn_ie,
1298 elems.rsn_ie_len);
1299 return;
1300 }
1301
1302 wpa_auth_set_ocv(sm, mconf->ocv &&
1303 (data.capabilities &
1304 WPA_CAPABILITY_OCVC));
1305 }
1306
1307 if (action_field != PLINK_CLOSE &&
1308 wpa_auth_uses_ocv(sta->wpa_sm)) {
1309 struct wpa_channel_info ci;
1310 int tx_chanwidth;
1311 int tx_seg1_idx;
1312
1313 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
1314 wpa_printf(MSG_WARNING,
1315 "MPM: Failed to get channel info to validate received OCI in MPM Confirm");
1316 return;
1317 }
1318
1319 if (get_tx_parameters(
1320 sta, channel_width_to_int(ci.chanwidth),
1321 ci.seg1_idx, &tx_chanwidth,
1322 &tx_seg1_idx) < 0)
1323 return;
1324
1325 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci,
1326 tx_chanwidth, tx_seg1_idx) !=
1327 OCI_SUCCESS) {
1328 wpa_printf(MSG_WARNING, "MPM: OCV failed: %s",
1329 ocv_errorstr);
1330 return;
1331 }
1332 }
1333 #endif /* CONFIG_OCV */
1334 }
1335
1336 if (sta->plink_state == PLINK_BLOCKED) {
1337 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED");
1338 return;
1339 }
1340
1341 /* Now we will figure out the appropriate event... */
1342 switch (action_field) {
1343 case PLINK_OPEN:
1344 if (plink_free_count(hapd) == 0) {
1345 event = REQ_RJCT;
1346 reason = WLAN_REASON_MESH_MAX_PEERS;
1347 wpa_printf(MSG_INFO,
1348 "MPM: Peer link num over quota(%d)",
1349 hapd->max_plinks);
1350 } else if (sta->peer_lid && sta->peer_lid != plid) {
1351 wpa_printf(MSG_DEBUG,
1352 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1353 sta->peer_lid, plid);
1354 return; /* no FSM event */
1355 } else {
1356 sta->peer_lid = plid;
1357 event = OPN_ACPT;
1358 }
1359 break;
1360 case PLINK_CONFIRM:
1361 if (plink_free_count(hapd) == 0) {
1362 event = REQ_RJCT;
1363 reason = WLAN_REASON_MESH_MAX_PEERS;
1364 wpa_printf(MSG_INFO,
1365 "MPM: Peer link num over quota(%d)",
1366 hapd->max_plinks);
1367 } else if (sta->my_lid != llid ||
1368 (sta->peer_lid && sta->peer_lid != plid)) {
1369 wpa_printf(MSG_DEBUG,
1370 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x",
1371 sta->my_lid, llid, sta->peer_lid, plid);
1372 return; /* no FSM event */
1373 } else {
1374 if (!sta->peer_lid)
1375 sta->peer_lid = plid;
1376 sta->peer_aid = aid;
1377 event = CNF_ACPT;
1378 }
1379 break;
1380 case PLINK_CLOSE:
1381 if (sta->plink_state == PLINK_ESTAB)
1382 /* Do not check for llid or plid. This does not
1383 * follow the standard but since multiple plinks
1384 * per cand are not supported, it is necessary in
1385 * order to avoid a livelock when MP A sees an
1386 * establish peer link to MP B but MP B does not
1387 * see it. This can be caused by a timeout in
1388 * B's peer link establishment or B being
1389 * restarted.
1390 */
1391 event = CLS_ACPT;
1392 else if (sta->peer_lid != plid) {
1393 wpa_printf(MSG_DEBUG,
1394 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1395 sta->peer_lid, plid);
1396 return; /* no FSM event */
1397 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) {
1398 wpa_printf(MSG_DEBUG,
1399 "MPM: my_lid mismatch: 0x%x != 0x%x",
1400 sta->my_lid, llid);
1401 return; /* no FSM event */
1402 } else {
1403 event = CLS_ACPT;
1404 }
1405 break;
1406 default:
1407 /*
1408 * This cannot be hit due to the action_field check above, but
1409 * compilers may not be able to figure that out and can warn
1410 * about uninitialized event below.
1411 */
1412 return;
1413 }
1414 mesh_mpm_fsm(wpa_s, sta, event, reason);
1415 }
1416
1417
1418 /* called by ap_free_sta */
mesh_mpm_free_sta(struct hostapd_data * hapd,struct sta_info * sta)1419 void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
1420 {
1421 if (sta->plink_state == PLINK_ESTAB)
1422 hapd->num_plinks--;
1423 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta);
1424 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta);
1425 }
1426