2 * WPA Supplicant - Basic mesh peer management
3 * Copyright (c) 2013-2014, cozybit, Inc. All rights reserved.
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "ap/hostapd.h"
15 #include "ap/sta_info.h"
16 #include "ap/ieee802_11.h"
17 #include "wpa_supplicant_i.h"
22 struct mesh_peer_mgmt_ie {
30 static void plink_timer(void *eloop_ctx, void *user_data);
45 static const char * const mplstate[] = {
46 [PLINK_LISTEN] = "LISTEN",
47 [PLINK_OPEN_SENT] = "OPEN_SENT",
48 [PLINK_OPEN_RCVD] = "OPEN_RCVD",
49 [PLINK_CNF_RCVD] = "CNF_RCVD",
50 [PLINK_ESTAB] = "ESTAB",
51 [PLINK_HOLDING] = "HOLDING",
52 [PLINK_BLOCKED] = "BLOCKED"
55 static const char * const mplevent[] = {
56 [PLINK_UNDEFINED] = "UNDEFINED",
57 [OPN_ACPT] = "OPN_ACPT",
58 [OPN_RJCT] = "OPN_RJCT",
59 [OPN_IGNR] = "OPN_IGNR",
60 [CNF_ACPT] = "CNF_ACPT",
61 [CNF_RJCT] = "CNF_RJCT",
62 [CNF_IGNR] = "CNF_IGNR",
63 [CLS_ACPT] = "CLS_ACPT",
64 [CLS_IGNR] = "CLS_IGNR"
68 static int mesh_mpm_parse_peer_mgmt(struct wpa_supplicant *wpa_s,
70 const u8 *ie, size_t len,
71 struct mesh_peer_mgmt_ie *mpm_ie)
73 os_memset(mpm_ie, 0, sizeof(*mpm_ie));
75 /* remove optional PMK at end */
78 mpm_ie->pmk = ie + len - 16;
81 if ((action_field == PLINK_OPEN && len != 4) ||
82 (action_field == PLINK_CONFIRM && len != 6) ||
83 (action_field == PLINK_CLOSE && len != 6 && len != 8)) {
84 wpa_msg(wpa_s, MSG_DEBUG, "MPM: Invalid peer mgmt ie");
91 mpm_ie->proto_id = ie;
92 mpm_ie->llid = ie + 2;
96 /* close reason is always present at end for close */
97 if (action_field == PLINK_CLOSE) {
100 mpm_ie->reason = ie + len - 2;
104 /* plid, present for confirm, and possibly close */
112 static int plink_free_count(struct hostapd_data *hapd)
114 if (hapd->max_plinks > hapd->num_plinks)
115 return hapd->max_plinks - hapd->num_plinks;
120 static u16 copy_supp_rates(struct wpa_supplicant *wpa_s,
121 struct sta_info *sta,
122 struct ieee802_11_elems *elems)
124 if (!elems->supp_rates) {
125 wpa_msg(wpa_s, MSG_ERROR, "no supported rates from " MACSTR,
127 return WLAN_STATUS_UNSPECIFIED_FAILURE;
130 if (elems->supp_rates_len + elems->ext_supp_rates_len >
131 sizeof(sta->supported_rates)) {
132 wpa_msg(wpa_s, MSG_ERROR,
133 "Invalid supported rates element length " MACSTR
134 " %d+%d", MAC2STR(sta->addr), elems->supp_rates_len,
135 elems->ext_supp_rates_len);
136 return WLAN_STATUS_UNSPECIFIED_FAILURE;
139 sta->supported_rates_len = merge_byte_arrays(
140 sta->supported_rates, sizeof(sta->supported_rates),
141 elems->supp_rates, elems->supp_rates_len,
142 elems->ext_supp_rates, elems->ext_supp_rates_len);
144 return WLAN_STATUS_SUCCESS;
148 /* return true if elems from a neighbor match this MBSS */
149 static Boolean matches_local(struct wpa_supplicant *wpa_s,
150 struct ieee802_11_elems *elems)
152 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
154 if (elems->mesh_config_len < 5)
157 return (mconf->meshid_len == elems->mesh_id_len &&
158 os_memcmp(mconf->meshid, elems->mesh_id,
159 elems->mesh_id_len) == 0 &&
160 mconf->mesh_pp_id == elems->mesh_config[0] &&
161 mconf->mesh_pm_id == elems->mesh_config[1] &&
162 mconf->mesh_cc_id == elems->mesh_config[2] &&
163 mconf->mesh_sp_id == elems->mesh_config[3] &&
164 mconf->mesh_auth_id == elems->mesh_config[4]);
168 /* check if local link id is already used with another peer */
169 static Boolean llid_in_use(struct wpa_supplicant *wpa_s, u16 llid)
171 struct sta_info *sta;
172 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
174 for (sta = hapd->sta_list; sta; sta = sta->next) {
175 if (sta->my_lid == llid)
183 /* generate an llid for a link and set to initial state */
184 static void mesh_mpm_init_link(struct wpa_supplicant *wpa_s,
185 struct sta_info *sta)
190 if (os_get_random((u8 *) &llid, sizeof(llid)) < 0)
192 } while (!llid || llid_in_use(wpa_s, llid));
198 * We do not use wpa_mesh_set_plink_state() here because there is no
199 * entry in kernel yet.
201 sta->plink_state = PLINK_LISTEN;
205 static void mesh_mpm_send_plink_action(struct wpa_supplicant *wpa_s,
206 struct sta_info *sta,
207 enum plink_action_field type,
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 #ifdef CONFIG_IEEE80211N
216 u8 ht_capa_oper[2 + 26 + 2 + 22];
217 #endif /* CONFIG_IEEE80211N */
219 u8 ie_len, add_plid = 0;
221 int ampe = conf->security & MESH_CONF_SEC_AMPE;
227 buf_len = 2 + /* capability info */
229 2 + 8 + /* supported rates */
231 2 + 32 + /* mesh ID */
232 2 + 7 + /* mesh config */
233 2 + 23 + /* peering management */
236 #ifdef CONFIG_IEEE80211N
237 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
238 buf_len += 2 + 26 + /* HT capabilities */
239 2 + 22; /* HT operation */
241 #endif /* CONFIG_IEEE80211N */
242 buf = wpabuf_alloc(buf_len);
246 cat = wpabuf_mhead_u8(buf);
247 wpabuf_put_u8(buf, WLAN_ACTION_SELF_PROTECTED);
248 wpabuf_put_u8(buf, type);
250 if (type != PLINK_CLOSE) {
253 /* capability info */
254 wpabuf_put_le16(buf, ampe ? IEEE80211_CAP_PRIVACY : 0);
257 if (type == PLINK_CONFIRM)
258 wpabuf_put_le16(buf, sta->peer_lid);
260 /* IE: supp + ext. supp rates */
261 pos = hostapd_eid_supp_rates(bss, supp_rates);
262 pos = hostapd_eid_ext_supp_rates(bss, pos);
263 wpabuf_put_data(buf, supp_rates, pos - supp_rates);
266 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
267 wpabuf_put_u8(buf, conf->meshid_len);
268 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
271 wpabuf_put_u8(buf, WLAN_EID_MESH_CONFIG);
272 wpabuf_put_u8(buf, 7);
273 wpabuf_put_u8(buf, conf->mesh_pp_id);
274 wpabuf_put_u8(buf, conf->mesh_pm_id);
275 wpabuf_put_u8(buf, conf->mesh_cc_id);
276 wpabuf_put_u8(buf, conf->mesh_sp_id);
277 wpabuf_put_u8(buf, conf->mesh_auth_id);
278 info = (bss->num_plinks > 63 ? 63 : bss->num_plinks) << 1;
279 /* TODO: Add Connected to Mesh Gate/AS subfields */
280 wpabuf_put_u8(buf, info);
281 /* always forwarding & accepting plinks for now */
282 wpabuf_put_u8(buf, 0x1 | 0x8);
283 } else { /* Peer closing frame */
285 wpabuf_put_u8(buf, WLAN_EID_MESH_ID);
286 wpabuf_put_u8(buf, conf->meshid_len);
287 wpabuf_put_data(buf, conf->meshid, conf->meshid_len);
290 /* IE: Mesh Peering Management element */
304 ie_len += 2; /* reason code */
308 wpabuf_put_u8(buf, WLAN_EID_PEER_MGMT);
309 wpabuf_put_u8(buf, ie_len);
310 /* peering protocol */
312 wpabuf_put_le16(buf, 1);
314 wpabuf_put_le16(buf, 0);
315 wpabuf_put_le16(buf, sta->my_lid);
317 wpabuf_put_le16(buf, sta->peer_lid);
318 if (type == PLINK_CLOSE)
319 wpabuf_put_le16(buf, close_reason);
321 if (sta->sae == NULL) {
322 wpa_msg(wpa_s, MSG_INFO, "Mesh MPM: no SAE session");
325 mesh_rsn_get_pmkid(wpa_s->mesh_rsn, sta,
326 wpabuf_put(buf, PMKID_LEN));
329 #ifdef CONFIG_IEEE80211N
330 if (type != PLINK_CLOSE && wpa_s->mesh_ht_enabled) {
331 pos = hostapd_eid_ht_capabilities(bss, ht_capa_oper);
332 pos = hostapd_eid_ht_operation(bss, pos);
333 wpabuf_put_data(buf, ht_capa_oper, pos - ht_capa_oper);
335 #endif /* CONFIG_IEEE80211N */
337 if (ampe && mesh_rsn_protect_frame(wpa_s->mesh_rsn, sta, cat, buf)) {
338 wpa_msg(wpa_s, MSG_INFO,
339 "Mesh MPM: failed to add AMPE and MIC IE");
343 ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0,
344 sta->addr, wpa_s->own_addr, wpa_s->own_addr,
345 wpabuf_head(buf), wpabuf_len(buf), 0);
347 wpa_msg(wpa_s, MSG_INFO,
348 "Mesh MPM: failed to send peering frame");
355 /* configure peering state in ours and driver's station entry */
356 void wpa_mesh_set_plink_state(struct wpa_supplicant *wpa_s,
357 struct sta_info *sta,
358 enum mesh_plink_state state)
360 struct hostapd_sta_add_params params;
363 sta->plink_state = state;
365 os_memset(¶ms, 0, sizeof(params));
366 params.addr = sta->addr;
367 params.plink_state = state;
370 wpa_msg(wpa_s, MSG_DEBUG, "MPM set " MACSTR " into %s",
371 MAC2STR(sta->addr), mplstate[state]);
372 ret = wpa_drv_sta_add(wpa_s, ¶ms);
374 wpa_msg(wpa_s, MSG_ERROR, "Driver failed to set " MACSTR
375 ": %d", MAC2STR(sta->addr), ret);
380 static void mesh_mpm_fsm_restart(struct wpa_supplicant *wpa_s,
381 struct sta_info *sta)
383 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
385 eloop_cancel_timeout(plink_timer, wpa_s, sta);
387 ap_free_sta(hapd, sta);
391 static void plink_timer(void *eloop_ctx, void *user_data)
393 struct wpa_supplicant *wpa_s = eloop_ctx;
394 struct sta_info *sta = user_data;
396 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
398 switch (sta->plink_state) {
399 case PLINK_OPEN_RCVD:
400 case PLINK_OPEN_SENT:
402 if (sta->mpm_retries < conf->dot11MeshMaxRetries) {
403 eloop_register_timeout(
404 conf->dot11MeshRetryTimeout / 1000,
405 (conf->dot11MeshRetryTimeout % 1000) * 1000,
406 plink_timer, wpa_s, sta);
407 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
411 reason = WLAN_REASON_MESH_MAX_RETRIES;
412 /* fall through on else */
417 reason = WLAN_REASON_MESH_CONFIRM_TIMEOUT;
418 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
419 eloop_register_timeout(conf->dot11MeshHoldingTimeout / 1000,
420 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
421 plink_timer, wpa_s, sta);
422 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
426 mesh_mpm_fsm_restart(wpa_s, sta);
434 /* initiate peering with station */
436 mesh_mpm_plink_open(struct wpa_supplicant *wpa_s, struct sta_info *sta,
437 enum mesh_plink_state next_state)
439 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
441 eloop_cancel_timeout(plink_timer, wpa_s, sta);
442 eloop_register_timeout(conf->dot11MeshRetryTimeout / 1000,
443 (conf->dot11MeshRetryTimeout % 1000) * 1000,
444 plink_timer, wpa_s, sta);
445 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_OPEN, 0);
446 wpa_mesh_set_plink_state(wpa_s, sta, next_state);
450 int mesh_mpm_plink_close(struct hostapd_data *hapd,
451 struct sta_info *sta, void *ctx)
453 struct wpa_supplicant *wpa_s = ctx;
454 int reason = WLAN_REASON_MESH_PEERING_CANCELLED;
457 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
458 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CLOSE, reason);
459 wpa_printf(MSG_DEBUG, "MPM closing plink sta=" MACSTR,
461 eloop_cancel_timeout(plink_timer, wpa_s, sta);
469 void mesh_mpm_deinit(struct wpa_supplicant *wpa_s, struct hostapd_iface *ifmsh)
471 struct hostapd_data *hapd = ifmsh->bss[0];
473 /* notify peers we're leaving */
474 ap_for_each_sta(hapd, mesh_mpm_plink_close, wpa_s);
476 hapd->num_plinks = 0;
477 hostapd_free_stas(hapd);
481 /* for mesh_rsn to indicate this peer has completed authentication, and we're
482 * ready to start AMPE */
483 void mesh_mpm_auth_peer(struct wpa_supplicant *wpa_s, const u8 *addr)
485 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
486 struct hostapd_sta_add_params params;
487 struct sta_info *sta;
490 sta = ap_get_sta(data, addr);
492 wpa_msg(wpa_s, MSG_DEBUG, "no such mesh peer");
496 /* TODO: Should do nothing if this STA is already authenticated, but
497 * the AP code already sets this flag. */
498 sta->flags |= WLAN_STA_AUTH;
500 mesh_rsn_init_ampe_sta(wpa_s, sta);
502 os_memset(¶ms, 0, sizeof(params));
503 params.addr = sta->addr;
504 params.flags = WPA_STA_AUTHENTICATED | WPA_STA_AUTHORIZED;
507 wpa_msg(wpa_s, MSG_DEBUG, "MPM authenticating " MACSTR,
509 ret = wpa_drv_sta_add(wpa_s, ¶ms);
511 wpa_msg(wpa_s, MSG_ERROR,
512 "Driver failed to set " MACSTR ": %d",
513 MAC2STR(sta->addr), ret);
517 mesh_mpm_init_link(wpa_s, sta);
519 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_SENT);
523 * Initialize a sta_info structure for a peer and upload it into the driver
524 * in preparation for beginning authentication or peering. This is done when a
525 * Beacon (secure or open mesh) or a peering open frame (for open mesh) is
526 * received from the peer for the first time.
528 static struct sta_info * mesh_mpm_add_peer(struct wpa_supplicant *wpa_s,
530 struct ieee802_11_elems *elems)
532 struct hostapd_sta_add_params params;
533 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
534 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
535 struct sta_info *sta;
538 sta = ap_get_sta(data, addr);
540 sta = ap_sta_add(data, addr);
546 if (copy_supp_rates(wpa_s, sta, elems)) {
547 ap_free_sta(data, sta);
551 mesh_mpm_init_link(wpa_s, sta);
553 #ifdef CONFIG_IEEE80211N
554 copy_sta_ht_capab(data, sta, elems->ht_capabilities,
555 elems->ht_capabilities_len);
556 update_ht_state(data, sta);
557 #endif /* CONFIG_IEEE80211N */
559 /* insert into driver */
560 os_memset(¶ms, 0, sizeof(params));
561 params.supp_rates = sta->supported_rates;
562 params.supp_rates_len = sta->supported_rates_len;
564 params.plink_state = sta->plink_state;
565 params.aid = sta->peer_lid;
566 params.listen_interval = 100;
567 params.ht_capabilities = sta->ht_capabilities;
568 params.flags |= WPA_STA_WMM;
569 params.flags_mask |= WPA_STA_AUTHENTICATED;
570 if (conf->security == MESH_CONF_SEC_NONE) {
571 params.flags |= WPA_STA_AUTHORIZED;
572 params.flags |= WPA_STA_AUTHENTICATED;
574 sta->flags |= WLAN_STA_MFP;
575 params.flags |= WPA_STA_MFP;
578 ret = wpa_drv_sta_add(wpa_s, ¶ms);
580 wpa_msg(wpa_s, MSG_ERROR,
581 "Driver failed to insert " MACSTR ": %d",
583 ap_free_sta(data, sta);
591 void wpa_mesh_new_mesh_peer(struct wpa_supplicant *wpa_s, const u8 *addr,
592 struct ieee802_11_elems *elems)
594 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
595 struct hostapd_data *data = wpa_s->ifmsh->bss[0];
596 struct sta_info *sta;
597 struct wpa_ssid *ssid = wpa_s->current_ssid;
599 sta = mesh_mpm_add_peer(wpa_s, addr, elems);
603 if (ssid && ssid->no_auto_peer) {
604 wpa_msg(wpa_s, MSG_INFO, "will not initiate new peer link with "
605 MACSTR " because of no_auto_peer", MAC2STR(addr));
606 if (data->mesh_pending_auth) {
607 struct os_reltime age;
608 const struct ieee80211_mgmt *mgmt;
609 struct hostapd_frame_info fi;
611 mgmt = wpabuf_head(data->mesh_pending_auth);
612 os_reltime_age(&data->mesh_pending_auth_time, &age);
614 os_memcmp(mgmt->sa, addr, ETH_ALEN) == 0) {
615 wpa_printf(MSG_DEBUG,
616 "mesh: Process pending Authentication frame from %u.%06u seconds ago",
617 (unsigned int) age.sec,
618 (unsigned int) age.usec);
619 os_memset(&fi, 0, sizeof(fi));
622 wpabuf_head(data->mesh_pending_auth),
623 wpabuf_len(data->mesh_pending_auth),
626 wpabuf_free(data->mesh_pending_auth);
627 data->mesh_pending_auth = NULL;
632 if (conf->security == MESH_CONF_SEC_NONE)
633 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_SENT);
635 mesh_rsn_auth_sae_sta(wpa_s, sta);
639 void mesh_mpm_mgmt_rx(struct wpa_supplicant *wpa_s, struct rx_mgmt *rx_mgmt)
641 struct hostapd_frame_info fi;
643 os_memset(&fi, 0, sizeof(fi));
644 fi.datarate = rx_mgmt->datarate;
645 fi.ssi_signal = rx_mgmt->ssi_signal;
646 ieee802_11_mgmt(wpa_s->ifmsh->bss[0], rx_mgmt->frame,
647 rx_mgmt->frame_len, &fi);
651 static void mesh_mpm_plink_estab(struct wpa_supplicant *wpa_s,
652 struct sta_info *sta)
654 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
655 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
658 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR " established",
661 if (conf->security & MESH_CONF_SEC_AMPE) {
662 wpa_drv_set_key(wpa_s, WPA_ALG_CCMP, sta->addr, 0, 0,
663 seq, sizeof(seq), sta->mtk, sizeof(sta->mtk));
664 wpa_drv_set_key(wpa_s, WPA_ALG_CCMP, sta->addr, 1, 0,
666 sta->mgtk, sizeof(sta->mgtk));
667 wpa_drv_set_key(wpa_s, WPA_ALG_IGTK, sta->addr, 4, 0,
669 sta->mgtk, sizeof(sta->mgtk));
671 wpa_hexdump_key(MSG_DEBUG, "mtk:", sta->mtk, sizeof(sta->mtk));
672 wpa_hexdump_key(MSG_DEBUG, "mgtk:",
673 sta->mgtk, sizeof(sta->mgtk));
676 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_ESTAB);
679 sta->flags |= WLAN_STA_ASSOC;
681 eloop_cancel_timeout(plink_timer, wpa_s, sta);
683 /* Send ctrl event */
684 wpa_msg_ctrl(wpa_s, MSG_INFO, MESH_PEER_CONNECTED MACSTR,
689 static void mesh_mpm_fsm(struct wpa_supplicant *wpa_s, struct sta_info *sta,
690 enum plink_event event)
692 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
693 struct mesh_conf *conf = wpa_s->ifmsh->mconf;
696 wpa_msg(wpa_s, MSG_DEBUG, "MPM " MACSTR " state %s event %s",
697 MAC2STR(sta->addr), mplstate[sta->plink_state],
700 switch (sta->plink_state) {
704 mesh_mpm_fsm_restart(wpa_s, sta);
707 mesh_mpm_plink_open(wpa_s, sta, PLINK_OPEN_RCVD);
708 mesh_mpm_send_plink_action(wpa_s, sta, PLINK_CONFIRM,
715 case PLINK_OPEN_SENT:
719 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
722 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
724 reason = WLAN_REASON_MESH_CLOSE_RCVD;
725 eloop_register_timeout(
726 conf->dot11MeshHoldingTimeout / 1000,
727 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
728 plink_timer, wpa_s, sta);
729 mesh_mpm_send_plink_action(wpa_s, sta,
730 PLINK_CLOSE, reason);
733 /* retry timer is left untouched */
734 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_OPEN_RCVD);
735 mesh_mpm_send_plink_action(wpa_s, sta,
739 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_CNF_RCVD);
740 eloop_register_timeout(
741 conf->dot11MeshConfirmTimeout / 1000,
742 (conf->dot11MeshConfirmTimeout % 1000) * 1000,
743 plink_timer, wpa_s, sta);
749 case PLINK_OPEN_RCVD:
753 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
756 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
758 reason = WLAN_REASON_MESH_CLOSE_RCVD;
759 eloop_register_timeout(
760 conf->dot11MeshHoldingTimeout / 1000,
761 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
762 plink_timer, wpa_s, sta);
763 sta->mpm_close_reason = reason;
764 mesh_mpm_send_plink_action(wpa_s, sta,
765 PLINK_CLOSE, reason);
768 mesh_mpm_send_plink_action(wpa_s, sta,
772 if (conf->security & MESH_CONF_SEC_AMPE)
773 mesh_rsn_derive_mtk(wpa_s, sta);
774 mesh_mpm_plink_estab(wpa_s, sta);
784 reason = WLAN_REASON_MESH_CONFIG_POLICY_VIOLATION;
787 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
789 reason = WLAN_REASON_MESH_CLOSE_RCVD;
790 eloop_register_timeout(
791 conf->dot11MeshHoldingTimeout / 1000,
792 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
793 plink_timer, wpa_s, sta);
794 sta->mpm_close_reason = reason;
795 mesh_mpm_send_plink_action(wpa_s, sta,
796 PLINK_CLOSE, reason);
799 mesh_mpm_plink_estab(wpa_s, sta);
800 mesh_mpm_send_plink_action(wpa_s, sta,
810 wpa_mesh_set_plink_state(wpa_s, sta, PLINK_HOLDING);
811 reason = WLAN_REASON_MESH_CLOSE_RCVD;
813 eloop_register_timeout(
814 conf->dot11MeshHoldingTimeout / 1000,
815 (conf->dot11MeshHoldingTimeout % 1000) * 1000,
816 plink_timer, wpa_s, sta);
817 sta->mpm_close_reason = reason;
819 wpa_msg(wpa_s, MSG_INFO, "mesh plink with " MACSTR
820 " closed with reason %d",
821 MAC2STR(sta->addr), reason);
823 wpa_msg_ctrl(wpa_s, MSG_INFO,
824 MESH_PEER_DISCONNECTED MACSTR,
829 mesh_mpm_send_plink_action(wpa_s, sta,
830 PLINK_CLOSE, reason);
833 mesh_mpm_send_plink_action(wpa_s, sta,
843 mesh_mpm_fsm_restart(wpa_s, sta);
849 reason = sta->mpm_close_reason;
850 mesh_mpm_send_plink_action(wpa_s, sta,
851 PLINK_CLOSE, reason);
858 wpa_msg(wpa_s, MSG_DEBUG,
859 "Unsupported MPM event %s for state %s",
860 mplevent[event], mplstate[sta->plink_state]);
866 void mesh_mpm_action_rx(struct wpa_supplicant *wpa_s,
867 const struct ieee80211_mgmt *mgmt, size_t len)
870 struct hostapd_data *hapd = wpa_s->ifmsh->bss[0];
871 struct mesh_conf *mconf = wpa_s->ifmsh->mconf;
872 struct sta_info *sta;
873 u16 plid = 0, llid = 0;
874 enum plink_event event;
875 struct ieee802_11_elems elems;
876 struct mesh_peer_mgmt_ie peer_mgmt_ie;
881 if (mgmt->u.action.category != WLAN_ACTION_SELF_PROTECTED)
884 action_field = mgmt->u.action.u.slf_prot_action.action;
885 if (action_field != PLINK_OPEN &&
886 action_field != PLINK_CONFIRM &&
887 action_field != PLINK_CLOSE)
890 ies = mgmt->u.action.u.slf_prot_action.variable;
891 ie_len = (const u8 *) mgmt + len -
892 mgmt->u.action.u.slf_prot_action.variable;
894 /* at least expect mesh id and peering mgmt */
895 if (ie_len < 2 + 2) {
896 wpa_printf(MSG_DEBUG,
897 "MPM: Ignore too short action frame %u ie_len %u",
898 action_field, (unsigned int) ie_len);
901 wpa_printf(MSG_DEBUG, "MPM: Received PLINK action %u", action_field);
903 if (action_field == PLINK_OPEN || action_field == PLINK_CONFIRM) {
904 wpa_printf(MSG_DEBUG, "MPM: Capability 0x%x",
906 ies += 2; /* capability */
909 if (action_field == PLINK_CONFIRM) {
910 wpa_printf(MSG_DEBUG, "MPM: AID 0x%x", WPA_GET_LE16(ies));
915 /* check for mesh peering, mesh id and mesh config IEs */
916 if (ieee802_11_parse_elems(ies, ie_len, &elems, 0) == ParseFailed) {
917 wpa_printf(MSG_DEBUG, "MPM: Failed to parse PLINK IEs");
920 if (!elems.peer_mgmt) {
921 wpa_printf(MSG_DEBUG,
922 "MPM: No Mesh Peering Management element");
925 if (action_field != PLINK_CLOSE) {
926 if (!elems.mesh_id || !elems.mesh_config) {
927 wpa_printf(MSG_DEBUG,
928 "MPM: No Mesh ID or Mesh Configuration element");
932 if (!matches_local(wpa_s, &elems)) {
933 wpa_printf(MSG_DEBUG,
934 "MPM: Mesh ID or Mesh Configuration element do not match local MBSS");
939 ret = mesh_mpm_parse_peer_mgmt(wpa_s, action_field,
944 wpa_printf(MSG_DEBUG, "MPM: Mesh parsing rejected frame");
948 /* the sender's llid is our plid and vice-versa */
949 plid = WPA_GET_LE16(peer_mgmt_ie.llid);
950 if (peer_mgmt_ie.plid)
951 llid = WPA_GET_LE16(peer_mgmt_ie.plid);
952 wpa_printf(MSG_DEBUG, "MPM: plid=0x%x llid=0x%x", plid, llid);
954 sta = ap_get_sta(hapd, mgmt->sa);
957 * If this is an open frame from an unknown STA, and this is an
958 * open mesh, then go ahead and add the peer before proceeding.
960 if (!sta && action_field == PLINK_OPEN &&
961 !(mconf->security & MESH_CONF_SEC_AMPE))
962 sta = mesh_mpm_add_peer(wpa_s, mgmt->sa, &elems);
965 wpa_printf(MSG_DEBUG, "MPM: No STA entry for peer");
970 /* peer is in sae_accepted? */
971 if (sta->sae && sta->sae->state != SAE_ACCEPTED) {
972 wpa_printf(MSG_DEBUG, "MPM: SAE not yet accepted for peer");
975 #endif /* CONFIG_SAE */
978 mesh_mpm_init_link(wpa_s, sta);
980 if ((mconf->security & MESH_CONF_SEC_AMPE) &&
981 mesh_rsn_process_ampe(wpa_s, sta, &elems,
982 &mgmt->u.action.category,
984 wpa_printf(MSG_DEBUG, "MPM: RSN process rejected frame");
988 if (sta->plink_state == PLINK_BLOCKED) {
989 wpa_printf(MSG_DEBUG, "MPM: PLINK_BLOCKED");
993 /* Now we will figure out the appropriate event... */
994 switch (action_field) {
996 if (plink_free_count(hapd) == 0) {
999 "MPM: Peer link num over quota(%d)",
1001 } else if (sta->peer_lid && sta->peer_lid != plid) {
1004 sta->peer_lid = plid;
1009 if (plink_free_count(hapd) == 0) {
1011 wpa_printf(MSG_INFO,
1012 "MPM: Peer link num over quota(%d)",
1014 } else if (sta->my_lid != llid ||
1015 (sta->peer_lid && sta->peer_lid != plid)) {
1019 sta->peer_lid = plid;
1024 if (sta->plink_state == PLINK_ESTAB)
1025 /* Do not check for llid or plid. This does not
1026 * follow the standard but since multiple plinks
1027 * per cand are not supported, it is necessary in
1028 * order to avoid a livelock when MP A sees an
1029 * establish peer link to MP B but MP B does not
1030 * see it. This can be caused by a timeout in
1031 * B's peer link establishment or B being
1035 else if (sta->peer_lid != plid)
1037 else if (peer_mgmt_ie.plid && sta->my_lid != llid)
1044 * This cannot be hit due to the action_field check above, but
1045 * compilers may not be able to figure that out and can warn
1046 * about uninitialized event below.
1050 mesh_mpm_fsm(wpa_s, sta, event);
1054 /* called by ap_free_sta */
1055 void mesh_mpm_free_sta(struct sta_info *sta)
1057 eloop_cancel_timeout(plink_timer, ELOOP_ALL_CTX, sta);
1058 eloop_cancel_timeout(mesh_auth_timer, ELOOP_ALL_CTX, sta);