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VHT: Remove a redundant check
[thirdparty/hostap.git] / wpa_supplicant / mesh_mpm.c
CommitLineData
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"
adc6a5d8 14#include "common/hw_features_common.h"
5f92659d
BC		 15#include "ap/hostapd.h"
16#include "ap/sta_info.h"
17#include "ap/ieee802_11.h"
9f2cf23e 18#include "ap/wpa_auth.h"
5f92659d
BC		 19#include "wpa_supplicant_i.h"
20#include "driver_i.h"
21#include "mesh_mpm.h"
0f950df0 22#include "mesh_rsn.h"
5f92659d 23
5f92659d 24struct mesh_peer_mgmt_ie {
c2ed7797
JM		 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) */
5f92659d
BC		 30};
31
32static void plink_timer(void *eloop_ctx, void *user_data);
33
34
35enum plink_event {
36 PLINK_UNDEFINED,
37 OPN_ACPT,
38 OPN_RJCT,
5f92659d
BC		 39 CNF_ACPT,
40 CNF_RJCT,
5f92659d 41 CLS_ACPT,
02022564 42 REQ_RJCT
5f92659d
BC		 43};
44
45static const char * const mplstate[] = {
b5f5c324 46 [0] = "UNINITIALIZED",
d02e5498
JM		 47 [PLINK_IDLE] = "IDLE",
48 [PLINK_OPN_SNT] = "OPN_SNT",
49 [PLINK_OPN_RCVD] = "OPN_RCVD",
5f92659d
BC		 50 [PLINK_CNF_RCVD] = "CNF_RCVD",
51 [PLINK_ESTAB] = "ESTAB",
52 [PLINK_HOLDING] = "HOLDING",
53 [PLINK_BLOCKED] = "BLOCKED"
54};
55
56static const char * const mplevent[] = {
57 [PLINK_UNDEFINED] = "UNDEFINED",
58 [OPN_ACPT] = "OPN_ACPT",
59 [OPN_RJCT] = "OPN_RJCT",
5f92659d
BC		 60 [CNF_ACPT] = "CNF_ACPT",
61 [CNF_RJCT] = "CNF_RJCT",
5f92659d 62 [CLS_ACPT] = "CLS_ACPT",
02022564 63 [REQ_RJCT] = "REQ_RJCT",
5f92659d
BC		 64};
65
66
67static 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
c2ed7797
JM		 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;
5f92659d
BC		 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
c2ed7797
JM		 103 /* Peer Link ID, present for confirm, and possibly close */
104 if (len >= 2)
5f92659d
BC		 105 mpm_ie->plid = ie;
106
107 return 0;
108}
109
110
111static 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
119static 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 */
148static 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 */
168static 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 */
183static 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;
e347cafe 195 sta->peer_aid = 0;
871ff0b7
MH		 196
197 /*
198 * We do not use wpa_mesh_set_plink_state() here because there is no
199 * entry in kernel yet.
200 */
d02e5498 201 sta->plink_state = PLINK_IDLE;
5f92659d
BC		 202}
203
204
205static 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];
0f950df0 215 u8 *pos, *cat;
5f92659d
BC		 216 u8 ie_len, add_plid = 0;
217 int ret;
218 int ampe = conf->security & MESH_CONF_SEC_AMPE;
798b3182 219 size_t buf_len;
5f92659d
BC		 220
221 if (!sta)
222 return;
223
798b3182
MH		 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
6334330e 234 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
798b3182
MH		 235 buf_len += 2 + 26 + /* HT capabilities */
236 2 + 22; /* HT operation */
237 }
238#endif /* CONFIG_IEEE80211N */
a65efbfb
PO		 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 */
f029c44c
MH		 245 if (type != PLINK_CLOSE)
246 buf_len += conf->rsn_ie_len; /* RSN IE */
247
798b3182 248 buf = wpabuf_alloc(buf_len);
5f92659d
BC		 249 if (!buf)
250 return;
251
0f950df0 252 cat = wpabuf_mhead_u8(buf);
5f92659d
BC		 253 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED);
254 wpabuf_put_u8(buf, type);
255
256 if (type != PLINK_CLOSE) {
d5b95325
MH		 257 u8 info;
258
5f92659d
BC		 259 /* capability info */
260 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0);
261
5cfb672d 262 /* aid */
5f92659d 263 if (type == PLINK_CONFIRM)
681753f2 264 wpabuf_put_le16(buf, sta->aid);
5f92659d
BC		 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
f029c44c
MH		 271 /* IE: RSN IE */
272 wpabuf_put_data(buf, conf->rsn_ie, conf->rsn_ie_len);
273
5f92659d
BC		 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);
d5b95325
MH		 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);
5f92659d 290 /* always forwarding & accepting plinks for now */
5a8e48fd
MH		 291 wpabuf_put_u8(buf, MESH_CAP_ACCEPT_ADDITIONAL_PEER |
292 MESH_CAP_FORWARDING);
5f92659d
BC		 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);
608b0ff5
JM		 330 if (ampe) {
331 if (sta->sae == NULL) {
332 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session");
333 goto fail;
334 }
0f950df0
TP		 335 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta,
336 wpabuf_put(buf, PMKID_LEN));
608b0ff5 337 }
5f92659d 338
5cfb672d 339#ifdef CONFIG_IEEE80211N
6334330e 340 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
a65efbfb
PO		 341 u8 ht_capa_oper[2 + 26 + 2 + 22];
342
5cfb672d
JM		 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 */
a65efbfb
PO		 348#ifdef CONFIG_IEEE80211AC
349 if (type != PLINK_CLOSE && wpa_s->mesh_vht_enabled) {
350 u8 vht_capa_oper[2 + 12 + 2 + 5];
351
fc72a48a 352 pos = hostapd_eid_vht_capabilities(bss, vht_capa_oper, 0);
a65efbfb
PO		 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 */
5f92659d 357
0f950df0
TP		 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
b5f5c324
JM		 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);
5f92659d
BC		 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
0f950df0 374fail:
5f92659d
BC		 375 wpabuf_free(buf);
376}
377
378
379/* configure peering state in ours and driver's station entry */
871ff0b7
MH		 380void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s,
381 struct sta_info *sta,
382 enum mesh_plink_state state)
5f92659d
BC		 383{
384 struct hostapd_sta_add_params params;
385 int ret;
386
b5f5c324
JM		 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]);
5f92659d
BC		 390 sta->plink_state = state;
391
392 os_memset(&params, 0, sizeof(params));
393 params.addr = sta->addr;
394 params.plink_state = state;
e347cafe 395 params.peer_aid = sta->peer_aid;
5f92659d
BC		 396 params.set = 1;
397
5f92659d
BC		 398 ret = wpa_drv_sta_add(wpa_s, &params);
399 if (ret) {
400 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR
401 ": %d", MAC2STR(sta->addr), ret);
402 }
403}
404
405
406static 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
41bff862 413 ap_free_sta(hapd, sta);
5f92659d
BC		 414}
415
416
417static 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;
e6096799 422 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
9f2cf23e 423 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
5f92659d
BC		 424
425 switch (sta->plink_state) {
d02e5498
JM		 426 case PLINK_OPN_RCVD:
427 case PLINK_OPN_SNT:
5f92659d 428 /* retry timer */
e6096799
MH		 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);
5f92659d
BC		 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;
871ff0b7 445 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
e6096799
MH		 446 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000,
447 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
448 plink_timer, wpa_s, sta);
5f92659d
BC		 449 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
450 break;
451 case PLINK_HOLDING:
452 /* holding timer */
9f2cf23e
MH		 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 }
5f92659d
BC		 460 mesh_mpm_fsm_restart(wpa_s, sta);
461 break;
462 default:
463 break;
464 }
465}
466
467
468/* initiate peering with station */
469static void
470mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta,
471 enum mesh_plink_state next_state)
472{
e6096799
MH		 473 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
474
5f92659d 475 eloop_cancel_timeout(plink_timer, wpa_s, sta);
e6096799
MH		 476 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000,
477 (conf->dot11MeshRetryTimeout % 1000) * 1000,
478 plink_timer, wpa_s, sta);
5f92659d
BC		 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
e174ef34
MH		 484static int mesh_mpm_plink_close(struct hostapd_data *hapd, struct sta_info *sta,
485 void *ctx)
5f92659d
BC		 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
e174ef34
MH		 503int 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
9f2cf23e
MH		 524static 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
533int mesh_mpm_connect_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
534 int duration)
2604edbf
MH		 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
d02e5498 561 if ((PLINK_OPN_SNT <= sta->plink_state &&
2604edbf
MH		 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
9f2cf23e 569 if (conf->security == MESH_CONF_SEC_NONE) {
d02e5498 570 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
9f2cf23e 571 } else {
2604edbf 572 mesh_rsn_auth_sae_sta(wpa_s, sta);
9f2cf23e
MH		 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 }
2604edbf
MH		 577
578 return 0;
579}
580
581
5f92659d
BC		 582void 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);
9f2cf23e 591 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
5f92659d
BC		 592}
593
594
595/* for mesh_rsn to indicate this peer has completed authentication, and we're
596 * ready to start AMPE */
597void 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
0f950df0
TP		 614 mesh_rsn_init_ampe_sta(wpa_s, sta);
615
5f92659d
BC		 616 os_memset(&params, 0, sizeof(params));
617 params.addr = sta->addr;
618 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED;
619 params.set = 1;
620
621 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR,
622 MAC2STR(sta->addr));
623 ret = wpa_drv_sta_add(wpa_s, &params);
624 if (ret) {
625 wpa_msg(wpa_s, MSG_ERROR,
626 "Driver failed to set " MACSTR ": %d",
627 MAC2STR(sta->addr), ret);
628 }
629
630 if (!sta->my_lid)
631 mesh_mpm_init_link(wpa_s, sta);
632
d02e5498 633 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
5f92659d
BC		 634}
635
745d9369
BC		 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 */
642static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s,
643 const u8 *addr,
644 struct ieee802_11_elems *elems)
5f92659d
BC		 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;
adc6a5d8
MH		 650#ifdef CONFIG_IEEE80211N
651 struct ieee80211_ht_operation *oper;
652#endif /* CONFIG_IEEE80211N */
745d9369 653 int ret;
5f92659d 654
d70a8ab1
MH		 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
5f92659d
BC		 663 sta = ap_get_sta(data, addr);
664 if (!sta) {
665 sta = ap_sta_add(data, addr);
666 if (!sta)
745d9369 667 return NULL;
5f92659d
BC		 668 }
669
a73c9842
PO		 670 /* Set WMM by default since Mesh STAs are QoS STAs */
671 sta->flags |= WLAN_STA_WMM;
672
5f92659d 673 /* initialize sta */
745d9369
BC		 674 if (copy_supp_rates(wpa_s, sta, elems)) {
675 ap_free_sta(data, sta);
676 return NULL;
677 }
5f92659d 678
cc64fe7b
JM		 679 if (!sta->my_lid)
680 mesh_mpm_init_link(wpa_s, sta);
5f92659d 681
5cfb672d 682#ifdef CONFIG_IEEE80211N
baae4cb9 683 copy_sta_ht_capab(data, sta, elems->ht_capabilities);
adc6a5d8
MH		 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 wpa_msg(wpa_s, MSG_DEBUG, MACSTR
689 " does not support 40 MHz bandwidth",
690 MAC2STR(sta->addr));
691 set_disable_ht40(sta->ht_capabilities, 1);
692 }
693
5cfb672d
JM		 694 update_ht_state(data, sta);
695#endif /* CONFIG_IEEE80211N */
696
a65efbfb
PO		 697#ifdef CONFIG_IEEE80211AC
698 copy_sta_vht_capab(data, sta, elems->vht_capabilities);
699 set_sta_vht_opmode(data, sta, elems->vht_opmode_notif);
700#endif /* CONFIG_IEEE80211AC */
701
681753f2
BC		 702 if (hostapd_get_aid(data, sta) < 0) {
703 wpa_msg(wpa_s, MSG_ERROR, "No AIDs available");
704 ap_free_sta(data, sta);
705 return NULL;
706 }
707
5f92659d
BC		 708 /* insert into driver */
709 os_memset(&params, 0, sizeof(params));
710 params.supp_rates = sta->supported_rates;
711 params.supp_rates_len = sta->supported_rates_len;
712 params.addr = addr;
713 params.plink_state = sta->plink_state;
681753f2 714 params.aid = sta->aid;
e347cafe 715 params.peer_aid = sta->peer_aid;
5f92659d 716 params.listen_interval = 100;
5cfb672d 717 params.ht_capabilities = sta->ht_capabilities;
a65efbfb 718 params.vht_capabilities = sta->vht_capabilities;
5f92659d
BC		 719 params.flags |= WPA_STA_WMM;
720 params.flags_mask |= WPA_STA_AUTHENTICATED;
721 if (conf->security == MESH_CONF_SEC_NONE) {
722 params.flags |= WPA_STA_AUTHORIZED;
723 params.flags |= WPA_STA_AUTHENTICATED;
724 } else {
725 sta->flags |= WLAN_STA_MFP;
726 params.flags |= WPA_STA_MFP;
727 }
728
729 ret = wpa_drv_sta_add(wpa_s, &params);
730 if (ret) {
731 wpa_msg(wpa_s, MSG_ERROR,
732 "Driver failed to insert " MACSTR ": %d",
733 MAC2STR(addr), ret);
745d9369
BC		 734 ap_free_sta(data, sta);
735 return NULL;
5f92659d
BC		 736 }
737
745d9369
BC		 738 return sta;
739}
740
741
742void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
743 struct ieee802_11_elems *elems)
744{
745 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
746 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
747 struct sta_info *sta;
748 struct wpa_ssid *ssid = wpa_s->current_ssid;
749
750 sta = mesh_mpm_add_peer(wpa_s, addr, elems);
751 if (!sta)
752 return;
753
9f2cf23e
MH		 754 if (ssid && ssid->no_auto_peer &&
755 (is_zero_ether_addr(data->mesh_required_peer) ||
756 os_memcmp(data->mesh_required_peer, addr, ETH_ALEN) != 0)) {
07cb45cc
TP		 757 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with "
758 MACSTR " because of no_auto_peer", MAC2STR(addr));
3a322496
JM		 759 if (data->mesh_pending_auth) {
760 struct os_reltime age;
761 const struct ieee80211_mgmt *mgmt;
762 struct hostapd_frame_info fi;
763
764 mgmt = wpabuf_head(data->mesh_pending_auth);
765 os_reltime_age(&data->mesh_pending_auth_time, &age);
766 if (age.sec < 2 &&
767 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) {
768 wpa_printf(MSG_DEBUG,
769 "mesh: Process pending Authentication frame from %u.%06u seconds ago",
770 (unsigned int) age.sec,
771 (unsigned int) age.usec);
772 os_memset(&fi, 0, sizeof(fi));
773 ieee802_11_mgmt(
774 data,
775 wpabuf_head(data->mesh_pending_auth),
776 wpabuf_len(data->mesh_pending_auth),
777 &fi);
778 }
779 wpabuf_free(data->mesh_pending_auth);
780 data->mesh_pending_auth = NULL;
781 }
07cb45cc
TP		 782 return;
783 }
784
27446e47 785 if (conf->security == MESH_CONF_SEC_NONE) {
d02e5498 786 if (sta->plink_state < PLINK_OPN_SNT ||
27446e47 787 sta->plink_state > PLINK_ESTAB)
d02e5498 788 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_SNT);
27446e47 789 } else {
0f950df0 790 mesh_rsn_auth_sae_sta(wpa_s, sta);
27446e47 791 }
5f92659d
BC		 792}
793
794
795void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt)
796{
797 struct hostapd_frame_info fi;
798
799 os_memset(&fi, 0, sizeof(fi));
800 fi.datarate = rx_mgmt->datarate;
801 fi.ssi_signal = rx_mgmt->ssi_signal;
802 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame,
803 rx_mgmt->frame_len, &fi);
804}
805
806
807static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
808 struct sta_info *sta)
809{
810 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
0f950df0
TP		 811 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
812 u8 seq[6] = {};
5f92659d
BC		 813
814 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established",
815 MAC2STR(sta->addr));
816
0f950df0 817 if (conf->security & MESH_CONF_SEC_AMPE) {
b02f4d05 818 wpa_hexdump_key(MSG_DEBUG, "mesh: MTK", sta->mtk, sta->mtk_len);
3b6deac0
JM		 819 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->pairwise_cipher),
820 sta->addr, 0, 0, seq, sizeof(seq),
821 sta->mtk, sta->mtk_len);
a4eec3c2 822
f868d560
JM		 823 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK Key RSC",
824 sta->mgtk_rsc, sizeof(sta->mgtk_rsc));
a4eec3c2
JM		 825 wpa_hexdump_key(MSG_DEBUG, "mesh: RX MGTK",
826 sta->mgtk, sta->mgtk_len);
3b6deac0
JM		 827 wpa_drv_set_key(wpa_s, wpa_cipher_to_alg(conf->group_cipher),
828 sta->addr, sta->mgtk_key_id, 0,
f868d560 829 sta->mgtk_rsc, sizeof(sta->mgtk_rsc),
a4eec3c2 830 sta->mgtk, sta->mgtk_len);
4367eec4
JM		 831
832 if (sta->igtk_len) {
f868d560
JM		 833 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK Key RSC",
834 sta->igtk_rsc, sizeof(sta->igtk_rsc));
3b6deac0 835 wpa_hexdump_key(MSG_DEBUG, "mesh: RX IGTK",
4367eec4 836 sta->igtk, sta->igtk_len);
3b6deac0
JM		 837 wpa_drv_set_key(
838 wpa_s,
839 wpa_cipher_to_alg(conf->mgmt_group_cipher),
840 sta->addr, sta->igtk_key_id, 0,
841 sta->igtk_rsc, sizeof(sta->igtk_rsc),
842 sta->igtk, sta->igtk_len);
4367eec4 843 }
0f950df0
TP		 844 }
845
5f92659d
BC		 846 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);
847 hapd->num_plinks++;
848
849 sta->flags |= WLAN_STA_ASSOC;
9f2cf23e 850 sta->mesh_sae_pmksa_caching = 0;
5f92659d 851
9f2cf23e
MH		 852 eloop_cancel_timeout(peer_add_timer, wpa_s, NULL);
853 peer_add_timer(wpa_s, NULL);
5f92659d
BC		 854 eloop_cancel_timeout(plink_timer, wpa_s, sta);
855
856 /* Send ctrl event */
6174de66
JM		 857 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR,
858 MAC2STR(sta->addr));
5f92659d
BC		 859}
860
861
862static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
02022564 863 enum plink_event event, u16 reason)
5f92659d
BC		 864{
865 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
0f950df0 866 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
5f92659d
BC		 867
868 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s",
869 MAC2STR(sta->addr), mplstate[sta->plink_state],
870 mplevent[event]);
871
872 switch (sta->plink_state) {
d02e5498 873 case PLINK_IDLE:
5f92659d
BC		 874 switch (event) {
875 case CLS_ACPT:
876 mesh_mpm_fsm_restart(wpa_s, sta);
877 break;
878 case OPN_ACPT:
d02e5498 879 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPN_RCVD);
5f92659d
BC		 880 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM,
881 0);
882 break;
02022564
JM		 883 case REQ_RJCT:
884 mesh_mpm_send_plink_action(wpa_s, sta,
885 PLINK_CLOSE, reason);
886 break;
5f92659d
BC		 887 default:
888 break;
889 }
890 break;
d02e5498 891 case PLINK_OPN_SNT:
5f92659d
BC		 892 switch (event) {
893 case OPN_RJCT:
894 case CNF_RJCT:
02022564
JM		 895 if (!reason)
896 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
5f92659d
BC		 897 /* fall-through */
898 case CLS_ACPT:
899 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
900 if (!reason)
901 reason = WLAN_REASON_MESH_CLOSE_RCVD;
e6096799
MH		 902 eloop_register_timeout(
903 conf->dot11MeshHoldingTimeout / 1000,
904 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
905 plink_timer, wpa_s, sta);
5f92659d
BC		 906 mesh_mpm_send_plink_action(wpa_s, sta,
907 PLINK_CLOSE, reason);
908 break;
909 case OPN_ACPT:
910 /* retry timer is left untouched */
d02e5498 911 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPN_RCVD);
5f92659d
BC		 912 mesh_mpm_send_plink_action(wpa_s, sta,
913 PLINK_CONFIRM, 0);
914 break;
915 case CNF_ACPT:
916 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
baa12136 917 eloop_cancel_timeout(plink_timer, wpa_s, sta);
e6096799
MH		 918 eloop_register_timeout(
919 conf->dot11MeshConfirmTimeout / 1000,
920 (conf->dot11MeshConfirmTimeout % 1000) * 1000,
921 plink_timer, wpa_s, sta);
5f92659d
BC		 922 break;
923 default:
924 break;
925 }
926 break;
d02e5498 927 case PLINK_OPN_RCVD:
5f92659d
BC		 928 switch (event) {
929 case OPN_RJCT:
930 case CNF_RJCT:
02022564
JM		 931 if (!reason)
932 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
5f92659d
BC		 933 /* fall-through */
934 case CLS_ACPT:
935 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
936 if (!reason)
937 reason = WLAN_REASON_MESH_CLOSE_RCVD;
e6096799
MH		 938 eloop_register_timeout(
939 conf->dot11MeshHoldingTimeout / 1000,
940 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
941 plink_timer, wpa_s, sta);
5f92659d
BC		 942 sta->mpm_close_reason = reason;
943 mesh_mpm_send_plink_action(wpa_s, sta,
944 PLINK_CLOSE, reason);
945 break;
946 case OPN_ACPT:
947 mesh_mpm_send_plink_action(wpa_s, sta,
948 PLINK_CONFIRM, 0);
949 break;
950 case CNF_ACPT:
0f950df0
TP		 951 if (conf->security & MESH_CONF_SEC_AMPE)
952 mesh_rsn_derive_mtk(wpa_s, sta);
5f92659d
BC		 953 mesh_mpm_plink_estab(wpa_s, sta);
954 break;
955 default:
956 break;
957 }
958 break;
959 case PLINK_CNF_RCVD:
960 switch (event) {
961 case OPN_RJCT:
962 case CNF_RJCT:
02022564
JM		 963 if (!reason)
964 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
5f92659d
BC		 965 /* fall-through */
966 case CLS_ACPT:
967 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
968 if (!reason)
969 reason = WLAN_REASON_MESH_CLOSE_RCVD;
e6096799
MH		 970 eloop_register_timeout(
971 conf->dot11MeshHoldingTimeout / 1000,
972 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
973 plink_timer, wpa_s, sta);
5f92659d
BC		 974 sta->mpm_close_reason = reason;
975 mesh_mpm_send_plink_action(wpa_s, sta,
976 PLINK_CLOSE, reason);
977 break;
978 case OPN_ACPT:
f42c3ceb
PO		 979 if (conf->security & MESH_CONF_SEC_AMPE)
980 mesh_rsn_derive_mtk(wpa_s, sta);
5f92659d
BC		 981 mesh_mpm_plink_estab(wpa_s, sta);
982 mesh_mpm_send_plink_action(wpa_s, sta,
983 PLINK_CONFIRM, 0);
984 break;
985 default:
986 break;
987 }
988 break;
989 case PLINK_ESTAB:
990 switch (event) {
78ac3685
JM		 991 case OPN_RJCT:
992 case CNF_RJCT:
5f92659d
BC		 993 case CLS_ACPT:
994 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
02022564
JM		 995 if (!reason)
996 reason = WLAN_REASON_MESH_CLOSE_RCVD;
5f92659d 997
e6096799
MH		 998 eloop_register_timeout(
999 conf->dot11MeshHoldingTimeout / 1000,
1000 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
1001 plink_timer, wpa_s, sta);
5f92659d
BC		 1002 sta->mpm_close_reason = reason;
1003
1004 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR
1005 " closed with reason %d",
1006 MAC2STR(sta->addr), reason);
1007
6174de66
JM		 1008 wpa_msg(wpa_s, MSG_INFO, MESH_PEER_DISCONNECTED MACSTR,
1009 MAC2STR(sta->addr));
5f92659d
BC		 1010
1011 hapd->num_plinks--;
1012
1013 mesh_mpm_send_plink_action(wpa_s, sta,
1014 PLINK_CLOSE, reason);
1015 break;
1016 case OPN_ACPT:
1017 mesh_mpm_send_plink_action(wpa_s, sta,
1018 PLINK_CONFIRM, 0);
1019 break;
1020 default:
1021 break;
1022 }
1023 break;
1024 case PLINK_HOLDING:
1025 switch (event) {
1026 case CLS_ACPT:
1027 mesh_mpm_fsm_restart(wpa_s, sta);
1028 break;
1029 case OPN_ACPT:
1030 case CNF_ACPT:
1031 case OPN_RJCT:
1032 case CNF_RJCT:
1033 reason = sta->mpm_close_reason;
1034 mesh_mpm_send_plink_action(wpa_s, sta,
1035 PLINK_CLOSE, reason);
1036 break;
1037 default:
1038 break;
1039 }
1040 break;
1041 default:
1042 wpa_msg(wpa_s, MSG_DEBUG,
1043 "Unsupported MPM event %s for state %s",
1044 mplevent[event], mplstate[sta->plink_state]);
1045 break;
1046 }
1047}
1048
1049
1050void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s,
1051 const struct ieee80211_mgmt *mgmt, size_t len)
1052{
1053 u8 action_field;
1054 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
0f950df0 1055 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
5f92659d 1056 struct sta_info *sta;
e347cafe 1057 u16 plid = 0, llid = 0, aid = 0;
5f92659d
BC		 1058 enum plink_event event;
1059 struct ieee802_11_elems elems;
1060 struct mesh_peer_mgmt_ie peer_mgmt_ie;
1061 const u8 *ies;
1062 size_t ie_len;
1063 int ret;
02022564 1064 u16 reason = 0;
5f92659d
BC		 1065
1066 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED)
1067 return;
1068
1069 action_field = mgmt->u.action.u.slf_prot_action.action;
c932b43e
JM		 1070 if (action_field != PLINK_OPEN &&
1071 action_field != PLINK_CONFIRM &&
1072 action_field != PLINK_CLOSE)
1073 return;
5f92659d
BC		 1074
1075 ies = mgmt->u.action.u.slf_prot_action.variable;
1076 ie_len = (const u8 *) mgmt + len -
1077 mgmt->u.action.u.slf_prot_action.variable;
1078
1079 /* at least expect mesh id and peering mgmt */
c932b43e
JM		 1080 if (ie_len < 2 + 2) {
1081 wpa_printf(MSG_DEBUG,
1082 "MPM: Ignore too short action frame %u ie_len %u",
1083 action_field, (unsigned int) ie_len);
5f92659d 1084 return;
c932b43e
JM		 1085 }
1086 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field);
5f92659d
BC		 1087
1088 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) {
c932b43e
JM		 1089 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x",
1090 WPA_GET_LE16(ies));
5f92659d
BC		 1091 ies += 2; /* capability */
1092 ie_len -= 2;
1093 }
1094 if (action_field == PLINK_CONFIRM) {
e347cafe
MH		 1095 aid = WPA_GET_LE16(ies);
1096 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", aid);
5f92659d
BC		 1097 ies += 2; /* aid */
1098 ie_len -= 2;
1099 }
1100
1101 /* check for mesh peering, mesh id and mesh config IEs */
c932b43e
JM		 1102 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
1103 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs");
5f92659d 1104 return;
c932b43e
JM		 1105 }
1106 if (!elems.peer_mgmt) {
1107 wpa_printf(MSG_DEBUG,
1108 "MPM: No Mesh Peering Management element");
5f92659d 1109 return;
c932b43e
JM		 1110 }
1111 if (action_field != PLINK_CLOSE) {
1112 if (!elems.mesh_id || !elems.mesh_config) {
1113 wpa_printf(MSG_DEBUG,
1114 "MPM: No Mesh ID or Mesh Configuration element");
1115 return;
1116 }
5f92659d 1117
c932b43e
JM		 1118 if (!matches_local(wpa_s, &elems)) {
1119 wpa_printf(MSG_DEBUG,
1120 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS");
1121 return;
1122 }
1123 }
5f92659d
BC		 1124
1125 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field,
1126 elems.peer_mgmt,
1127 elems.peer_mgmt_len,
1128 &peer_mgmt_ie);
c932b43e
JM		 1129 if (ret) {
1130 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame");
5f92659d 1131 return;
c932b43e 1132 }
5f92659d
BC		 1133
1134 /* the sender's llid is our plid and vice-versa */
1135 plid = WPA_GET_LE16(peer_mgmt_ie.llid);
1136 if (peer_mgmt_ie.plid)
1137 llid = WPA_GET_LE16(peer_mgmt_ie.plid);
c932b43e 1138 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid);
5f92659d 1139
e8afaad7
JM		 1140 if (action_field == PLINK_CLOSE)
1141 wpa_printf(MSG_DEBUG, "MPM: close reason=%u",
1142 WPA_GET_LE16(peer_mgmt_ie.reason));
1143
5f92659d 1144 sta = ap_get_sta(hapd, mgmt->sa);
745d9369
BC		 1145
1146 /*
1147 * If this is an open frame from an unknown STA, and this is an
1148 * open mesh, then go ahead and add the peer before proceeding.
1149 */
1150 if (!sta && action_field == PLINK_OPEN &&
9f2cf23e 1151 (!(mconf->security & MESH_CONF_SEC_AMPE) ||
c1bd4bac 1152 wpa_auth_pmksa_get(hapd->wpa_auth, mgmt->sa, NULL)))
745d9369
BC		 1153 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems);
1154
c932b43e
JM		 1155 if (!sta) {
1156 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer");
5f92659d 1157 return;
c932b43e 1158 }
5f92659d 1159
0f950df0
TP		 1160#ifdef CONFIG_SAE
1161 /* peer is in sae_accepted? */
c932b43e
JM		 1162 if (sta->sae && sta->sae->state != SAE_ACCEPTED) {
1163 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer");
0f950df0 1164 return;
c932b43e 1165 }
0f950df0
TP		 1166#endif /* CONFIG_SAE */
1167
5f92659d
BC		 1168 if (!sta->my_lid)
1169 mesh_mpm_init_link(wpa_s, sta);
1170
1f2f3f1c
JM		 1171 if (mconf->security & MESH_CONF_SEC_AMPE) {
1172 int res;
1173
1174 res = mesh_rsn_process_ampe(wpa_s, sta, &elems,
1175 &mgmt->u.action.category,
1176 peer_mgmt_ie.chosen_pmk,
1177 ies, ie_len);
1178 if (res) {
1179 wpa_printf(MSG_DEBUG,
1180 "MPM: RSN process rejected frame (res=%d)",
1181 res);
1182 if (action_field == PLINK_OPEN && res == -2) {
1183 /* AES-SIV decryption failed */
02022564
JM		 1184 mesh_mpm_fsm(wpa_s, sta, OPN_RJCT,
1185 WLAN_REASON_MESH_INVALID_GTK);
1f2f3f1c
JM		 1186 }
1187 return;
1188 }
c932b43e 1189 }
0f950df0 1190
c932b43e
JM		 1191 if (sta->plink_state == PLINK_BLOCKED) {
1192 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED");
5f92659d 1193 return;
c932b43e 1194 }
5f92659d
BC		 1195
1196 /* Now we will figure out the appropriate event... */
1197 switch (action_field) {
1198 case PLINK_OPEN:
46e8d90f 1199 if (plink_free_count(hapd) == 0) {
02022564
JM		 1200 event = REQ_RJCT;
1201 reason = WLAN_REASON_MESH_MAX_PEERS;
46e8d90f
MH		 1202 wpa_printf(MSG_INFO,
1203 "MPM: Peer link num over quota(%d)",
1204 hapd->max_plinks);
1205 } else if (sta->peer_lid && sta->peer_lid != plid) {
8bd90996
JM		 1206 wpa_printf(MSG_DEBUG,
1207 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1208 sta->peer_lid, plid);
02022564 1209 return; /* no FSM event */
5f92659d
BC		 1210 } else {
1211 sta->peer_lid = plid;
1212 event = OPN_ACPT;
1213 }
1214 break;
1215 case PLINK_CONFIRM:
46e8d90f 1216 if (plink_free_count(hapd) == 0) {
02022564
JM		 1217 event = REQ_RJCT;
1218 reason = WLAN_REASON_MESH_MAX_PEERS;
46e8d90f
MH		 1219 wpa_printf(MSG_INFO,
1220 "MPM: Peer link num over quota(%d)",
1221 hapd->max_plinks);
1222 } else if (sta->my_lid != llid ||
1223 (sta->peer_lid && sta->peer_lid != plid)) {
8bd90996
JM		 1224 wpa_printf(MSG_DEBUG,
1225 "MPM: lid mismatch: my_lid: 0x%x != 0x%x or peer_lid: 0x%x != 0x%x",
1226 sta->my_lid, llid, sta->peer_lid, plid);
02022564 1227 return; /* no FSM event */
5f92659d
BC		 1228 } else {
1229 if (!sta->peer_lid)
1230 sta->peer_lid = plid;
e347cafe 1231 sta->peer_aid = aid;
5f92659d
BC		 1232 event = CNF_ACPT;
1233 }
1234 break;
1235 case PLINK_CLOSE:
1236 if (sta->plink_state == PLINK_ESTAB)
1237 /* Do not check for llid or plid. This does not
1238 * follow the standard but since multiple plinks
1239 * per cand are not supported, it is necessary in
1240 * order to avoid a livelock when MP A sees an
1241 * establish peer link to MP B but MP B does not
1242 * see it. This can be caused by a timeout in
1243 * B's peer link establishment or B being
1244 * restarted.
1245 */
1246 event = CLS_ACPT;
8bd90996
JM		 1247 else if (sta->peer_lid != plid) {
1248 wpa_printf(MSG_DEBUG,
1249 "MPM: peer_lid mismatch: 0x%x != 0x%x",
1250 sta->peer_lid, plid);
02022564 1251 return; /* no FSM event */
8bd90996
JM		 1252 } else if (peer_mgmt_ie.plid && sta->my_lid != llid) {
1253 wpa_printf(MSG_DEBUG,
1254 "MPM: my_lid mismatch: 0x%x != 0x%x",
1255 sta->my_lid, llid);
02022564 1256 return; /* no FSM event */
8bd90996 1257 } else {
5f92659d 1258 event = CLS_ACPT;
8bd90996 1259 }
5f92659d 1260 break;
763041b2
JM		 1261 default:
1262 /*
1263 * This cannot be hit due to the action_field check above, but
1264 * compilers may not be able to figure that out and can warn
1265 * about uninitialized event below.
1266 */
1267 return;
5f92659d 1268 }
02022564 1269 mesh_mpm_fsm(wpa_s, sta, event, reason);
5f92659d 1270}
c596f3f0
CYY		 1271
1272
1273/* called by ap_free_sta */
9684c756 1274void mesh_mpm_free_sta(struct hostapd_data *hapd, struct sta_info *sta)
c596f3f0 1275{
9684c756
SD		 1276 if (sta->plink_state == PLINK_ESTAB)
1277 hapd->num_plinks--;
c596f3f0
CYY		 1278 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta);
1279 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta);
1280}
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