2 * wpa_supplicant - IBSS RSN
3 * Copyright (c) 2009-2013, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "common/wpa_ctrl.h"
13 #include "utils/eloop.h"
14 #include "l2_packet/l2_packet.h"
15 #include "rsn_supp/wpa.h"
16 #include "rsn_supp/wpa_ie.h"
17 #include "ap/wpa_auth.h"
18 #include "wpa_supplicant_i.h"
20 #include "common/ieee802_11_defs.h"
24 static void ibss_rsn_auth_timeout(void *eloop_ctx, void *timeout_ctx);
27 static struct ibss_rsn_peer * ibss_rsn_get_peer(struct ibss_rsn *ibss_rsn,
30 struct ibss_rsn_peer *peer;
32 for (peer = ibss_rsn->peers; peer; peer = peer->next)
33 if (os_memcmp(addr, peer->addr, ETH_ALEN) == 0)
39 static void ibss_rsn_free(struct ibss_rsn_peer *peer)
41 eloop_cancel_timeout(ibss_rsn_auth_timeout, peer, NULL);
42 wpa_auth_sta_deinit(peer->auth);
43 wpa_sm_deinit(peer->supp);
48 static void supp_set_state(void *ctx, enum wpa_states state)
50 struct ibss_rsn_peer *peer = ctx;
51 peer->supp_state = state;
55 static enum wpa_states supp_get_state(void *ctx)
57 struct ibss_rsn_peer *peer = ctx;
58 return peer->supp_state;
62 static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
65 struct ibss_rsn_peer *peer = ctx;
66 struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
68 wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
70 __func__, MAC2STR(dest), proto, (unsigned long) len);
73 return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
79 static u8 * supp_alloc_eapol(void *ctx, u8 type, const void *data,
80 u16 data_len, size_t *msg_len, void **data_pos)
82 struct ieee802_1x_hdr *hdr;
84 wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
85 __func__, type, data_len);
87 *msg_len = sizeof(*hdr) + data_len;
88 hdr = os_malloc(*msg_len);
94 hdr->length = host_to_be16(data_len);
97 os_memcpy(hdr + 1, data, data_len);
99 os_memset(hdr + 1, 0, data_len);
108 static int supp_get_beacon_ie(void *ctx)
110 struct ibss_rsn_peer *peer = ctx;
112 wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
113 /* TODO: get correct RSN IE */
114 return wpa_sm_set_ap_rsn_ie(peer->supp,
115 (u8 *) "\x30\x14\x01\x00"
117 "\x01\x00\x00\x0f\xac\x04"
118 "\x01\x00\x00\x0f\xac\x02"
123 static void ibss_check_rsn_completed(struct ibss_rsn_peer *peer)
125 struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
127 if ((peer->authentication_status &
128 (IBSS_RSN_SET_PTK_SUPP | IBSS_RSN_SET_PTK_AUTH)) !=
129 (IBSS_RSN_SET_PTK_SUPP | IBSS_RSN_SET_PTK_AUTH))
131 if (peer->authentication_status & IBSS_RSN_REPORTED_PTK)
133 peer->authentication_status |= IBSS_RSN_REPORTED_PTK;
134 wpa_msg(wpa_s, MSG_INFO, IBSS_RSN_COMPLETED MACSTR,
135 MAC2STR(peer->addr));
139 static int supp_set_key(void *ctx, enum wpa_alg alg,
140 const u8 *addr, int key_idx, int set_tx,
141 const u8 *seq, size_t seq_len,
142 const u8 *key, size_t key_len)
144 struct ibss_rsn_peer *peer = ctx;
146 wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
148 __func__, alg, MAC2STR(addr), key_idx, set_tx);
149 wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
150 wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
153 peer->authentication_status |= IBSS_RSN_SET_PTK_SUPP;
154 ibss_check_rsn_completed(peer);
156 * In IBSS RSN, the pairwise key from the 4-way handshake
157 * initiated by the peer with highest MAC address is used.
159 if (os_memcmp(peer->ibss_rsn->wpa_s->own_addr, peer->addr,
161 wpa_printf(MSG_DEBUG, "SUPP: Do not use this PTK");
166 if (is_broadcast_ether_addr(addr))
168 return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
169 set_tx, seq, seq_len, key, key_len);
173 static void * supp_get_network_ctx(void *ctx)
175 struct ibss_rsn_peer *peer = ctx;
176 return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
180 static int supp_mlme_setprotection(void *ctx, const u8 *addr,
181 int protection_type, int key_type)
183 wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
185 __func__, MAC2STR(addr), protection_type, key_type);
190 static void supp_cancel_auth_timeout(void *ctx)
192 wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
196 static void supp_deauthenticate(void * ctx, int reason_code)
198 wpa_printf(MSG_DEBUG, "SUPP: %s (TODO)", __func__);
202 static int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
205 struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
210 ctx->msg_ctx = peer->ibss_rsn->wpa_s;
211 ctx->set_state = supp_set_state;
212 ctx->get_state = supp_get_state;
213 ctx->ether_send = supp_ether_send;
214 ctx->get_beacon_ie = supp_get_beacon_ie;
215 ctx->alloc_eapol = supp_alloc_eapol;
216 ctx->set_key = supp_set_key;
217 ctx->get_network_ctx = supp_get_network_ctx;
218 ctx->mlme_setprotection = supp_mlme_setprotection;
219 ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
220 ctx->deauthenticate = supp_deauthenticate;
221 peer->supp = wpa_sm_init(ctx);
222 if (peer->supp == NULL) {
223 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
228 wpa_sm_set_own_addr(peer->supp, own_addr);
229 wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
230 wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
231 wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
232 wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
233 wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
234 wpa_sm_set_pmk(peer->supp, psk, PMK_LEN, NULL, NULL);
236 peer->supp_ie_len = sizeof(peer->supp_ie);
237 if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
238 &peer->supp_ie_len) < 0) {
239 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
244 wpa_sm_notify_assoc(peer->supp, peer->addr);
250 static void auth_logger(void *ctx, const u8 *addr, logger_level level,
254 wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
257 wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
261 static const u8 * auth_get_psk(void *ctx, const u8 *addr,
262 const u8 *p2p_dev_addr, const u8 *prev_psk)
264 struct ibss_rsn *ibss_rsn = ctx;
265 wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
266 __func__, MAC2STR(addr), prev_psk);
269 return ibss_rsn->psk;
273 static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
274 size_t data_len, int encrypt)
276 struct ibss_rsn *ibss_rsn = ctx;
277 struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
279 wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
281 __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
284 return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
291 static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
292 const u8 *addr, int idx, u8 *key, size_t key_len)
294 struct ibss_rsn *ibss_rsn = ctx;
297 os_memset(seq, 0, sizeof(seq));
300 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d addr=" MACSTR
302 __func__, alg, MAC2STR(addr), idx);
304 wpa_printf(MSG_DEBUG, "AUTH: %s(alg=%d key_idx=%d)",
307 wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
311 struct ibss_rsn_peer *peer;
312 peer = ibss_rsn_get_peer(ibss_rsn, addr);
314 peer->authentication_status |=
315 IBSS_RSN_SET_PTK_AUTH;
316 ibss_check_rsn_completed(peer);
320 * In IBSS RSN, the pairwise key from the 4-way handshake
321 * initiated by the peer with highest MAC address is used.
324 os_memcmp(ibss_rsn->wpa_s->own_addr, addr, ETH_ALEN) < 0) {
325 wpa_printf(MSG_DEBUG, "AUTH: Do not use this PTK");
330 return wpa_drv_set_key(ibss_rsn->wpa_s, alg, addr, idx,
331 1, seq, 6, key, key_len);
335 static void ibss_rsn_disconnect(void *ctx, const u8 *addr, u16 reason)
337 struct ibss_rsn *ibss_rsn = ctx;
338 wpa_drv_sta_deauth(ibss_rsn->wpa_s, addr, reason);
342 static int auth_for_each_sta(void *ctx, int (*cb)(struct wpa_state_machine *sm,
346 struct ibss_rsn *ibss_rsn = ctx;
347 struct ibss_rsn_peer *peer;
349 wpa_printf(MSG_DEBUG, "AUTH: for_each_sta");
351 for (peer = ibss_rsn->peers; peer; peer = peer->next) {
352 if (peer->auth && cb(peer->auth, cb_ctx))
360 static void ibss_set_sta_authorized(struct ibss_rsn *ibss_rsn,
361 struct ibss_rsn_peer *peer, int authorized)
366 res = wpa_drv_sta_set_flags(ibss_rsn->wpa_s, peer->addr,
368 WPA_STA_AUTHORIZED, ~0);
369 wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " authorizing port",
370 MAC2STR(peer->addr));
372 res = wpa_drv_sta_set_flags(ibss_rsn->wpa_s, peer->addr,
373 0, 0, ~WPA_STA_AUTHORIZED);
374 wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " unauthorizing port",
375 MAC2STR(peer->addr));
378 if (res && errno != ENOENT) {
379 wpa_printf(MSG_DEBUG, "Could not set station " MACSTR " flags "
380 "for kernel driver (errno=%d)",
381 MAC2STR(peer->addr), errno);
386 static void auth_set_eapol(void *ctx, const u8 *addr,
387 wpa_eapol_variable var, int value)
389 struct ibss_rsn *ibss_rsn = ctx;
390 struct ibss_rsn_peer *peer = ibss_rsn_get_peer(ibss_rsn, addr);
396 case WPA_EAPOL_authorized:
397 ibss_set_sta_authorized(ibss_rsn, peer, value);
400 /* do not handle any other event */
401 wpa_printf(MSG_DEBUG, "AUTH: eapol event not handled %d", var);
407 static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
408 const u8 *own_addr, struct wpa_ssid *ssid)
410 struct wpa_auth_config conf;
411 struct wpa_auth_callbacks cb;
413 wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
415 os_memset(&conf, 0, sizeof(conf));
417 conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
418 conf.wpa_pairwise = WPA_CIPHER_CCMP;
419 conf.rsn_pairwise = WPA_CIPHER_CCMP;
420 conf.wpa_group = WPA_CIPHER_CCMP;
421 conf.eapol_version = 2;
422 conf.wpa_group_rekey = ssid->group_rekey ? ssid->group_rekey : 600;
424 os_memset(&cb, 0, sizeof(cb));
426 cb.logger = auth_logger;
427 cb.set_eapol = auth_set_eapol;
428 cb.send_eapol = auth_send_eapol;
429 cb.get_psk = auth_get_psk;
430 cb.set_key = auth_set_key;
431 cb.for_each_sta = auth_for_each_sta;
432 cb.disconnect = ibss_rsn_disconnect;
434 ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
435 if (ibss_rsn->auth_group == NULL) {
436 wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
440 wpa_init_keys(ibss_rsn->auth_group);
446 static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
447 struct ibss_rsn_peer *peer)
449 peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr, NULL);
450 if (peer->auth == NULL) {
451 wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
455 /* TODO: get peer RSN IE with Probe Request */
456 if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
457 (u8 *) "\x30\x14\x01\x00"
459 "\x01\x00\x00\x0f\xac\x04"
460 "\x01\x00\x00\x0f\xac\x02"
461 "\x00\x00", 22, NULL, 0) !=
463 wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
467 if (wpa_auth_sm_event(peer->auth, WPA_ASSOC))
470 if (wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth))
477 static int ibss_rsn_send_auth(struct ibss_rsn *ibss_rsn, const u8 *da, int seq)
479 struct ieee80211_mgmt auth;
480 const size_t auth_length = IEEE80211_HDRLEN + sizeof(auth.u.auth);
481 struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
483 if (wpa_s->driver->send_frame == NULL)
486 os_memset(&auth, 0, sizeof(auth));
488 auth.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
490 os_memcpy(auth.da, da, ETH_ALEN);
491 os_memcpy(auth.sa, wpa_s->own_addr, ETH_ALEN);
492 os_memcpy(auth.bssid, wpa_s->bssid, ETH_ALEN);
494 auth.u.auth.auth_alg = host_to_le16(WLAN_AUTH_OPEN);
495 auth.u.auth.auth_transaction = host_to_le16(seq);
496 auth.u.auth.status_code = host_to_le16(WLAN_STATUS_SUCCESS);
498 wpa_printf(MSG_DEBUG, "RSN: IBSS TX Auth frame (SEQ %d) to " MACSTR,
501 return wpa_s->driver->send_frame(wpa_s->drv_priv, (u8 *) &auth,
506 static int ibss_rsn_is_auth_started(struct ibss_rsn_peer * peer)
508 return peer->authentication_status &
509 (IBSS_RSN_AUTH_BY_US | IBSS_RSN_AUTH_EAPOL_BY_US);
513 static struct ibss_rsn_peer *
514 ibss_rsn_peer_init(struct ibss_rsn *ibss_rsn, const u8 *addr)
516 struct ibss_rsn_peer *peer;
517 if (ibss_rsn == NULL)
520 peer = ibss_rsn_get_peer(ibss_rsn, addr);
522 wpa_printf(MSG_DEBUG, "RSN: IBSS Supplicant for peer "MACSTR
523 " already running", MAC2STR(addr));
527 wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Supplicant for peer "MACSTR,
530 peer = os_zalloc(sizeof(*peer));
532 wpa_printf(MSG_DEBUG, "RSN: Could not allocate memory.");
536 peer->ibss_rsn = ibss_rsn;
537 os_memcpy(peer->addr, addr, ETH_ALEN);
538 peer->authentication_status = IBSS_RSN_AUTH_NOT_AUTHENTICATED;
540 if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr,
541 ibss_rsn->psk) < 0) {
546 peer->next = ibss_rsn->peers;
547 ibss_rsn->peers = peer;
553 static void ibss_rsn_auth_timeout(void *eloop_ctx, void *timeout_ctx)
555 struct ibss_rsn_peer *peer = eloop_ctx;
558 * Assume peer does not support Authentication exchange or the frame was
559 * lost somewhere - start EAPOL Authenticator.
561 wpa_printf(MSG_DEBUG,
562 "RSN: Timeout on waiting Authentication frame response from "
563 MACSTR " - start authenticator", MAC2STR(peer->addr));
565 peer->authentication_status |= IBSS_RSN_AUTH_BY_US;
566 ibss_rsn_auth_init(peer->ibss_rsn, peer);
570 int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
572 struct ibss_rsn_peer *peer;
578 /* if the peer already exists, exit immediately */
579 peer = ibss_rsn_get_peer(ibss_rsn, addr);
583 peer = ibss_rsn_peer_init(ibss_rsn, addr);
587 /* Open Authentication: send first Authentication frame */
588 res = ibss_rsn_send_auth(ibss_rsn, addr, 1);
591 * The driver may not support Authentication frame exchange in
592 * IBSS. Ignore authentication and go through EAPOL exchange.
594 peer->authentication_status |= IBSS_RSN_AUTH_BY_US;
595 return ibss_rsn_auth_init(ibss_rsn, peer);
597 os_get_reltime(&peer->own_auth_tx);
598 eloop_register_timeout(1, 0, ibss_rsn_auth_timeout, peer, NULL);
605 static int ibss_rsn_peer_authenticated(struct ibss_rsn *ibss_rsn,
606 struct ibss_rsn_peer *peer, int reason)
610 if (ibss_rsn == NULL || peer == NULL)
613 already_started = ibss_rsn_is_auth_started(peer);
614 peer->authentication_status |= reason;
616 if (already_started) {
617 wpa_printf(MSG_DEBUG, "RSN: IBSS Authenticator already "
618 "started for peer " MACSTR, MAC2STR(peer->addr));
622 wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator "
623 "for now-authenticated peer " MACSTR, MAC2STR(peer->addr));
625 return ibss_rsn_auth_init(ibss_rsn, peer);
629 void ibss_rsn_stop(struct ibss_rsn *ibss_rsn, const u8 *peermac)
631 struct ibss_rsn_peer *peer, *prev;
633 if (ibss_rsn == NULL)
636 if (peermac == NULL) {
637 /* remove all peers */
638 wpa_printf(MSG_DEBUG, "%s: Remove all peers", __func__);
639 peer = ibss_rsn->peers;
644 ibss_rsn->peers = peer;
647 /* remove specific peer */
648 wpa_printf(MSG_DEBUG, "%s: Remove specific peer " MACSTR,
649 __func__, MAC2STR(peermac));
651 for (prev = NULL, peer = ibss_rsn->peers; peer != NULL;
652 prev = peer, peer = peer->next) {
653 if (os_memcmp(peermac, peer->addr, ETH_ALEN) == 0) {
655 ibss_rsn->peers = peer->next;
657 prev->next = peer->next;
659 wpa_printf(MSG_DEBUG, "%s: Successfully "
660 "removed a specific peer",
669 struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s,
670 struct wpa_ssid *ssid)
672 struct ibss_rsn *ibss_rsn;
674 ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
675 if (ibss_rsn == NULL)
677 ibss_rsn->wpa_s = wpa_s;
679 if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr, ssid) < 0) {
680 ibss_rsn_deinit(ibss_rsn);
688 void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
690 struct ibss_rsn_peer *peer, *prev;
692 if (ibss_rsn == NULL)
695 peer = ibss_rsn->peers;
702 if (ibss_rsn->auth_group)
703 wpa_deinit(ibss_rsn->auth_group);
709 static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
711 const struct ieee802_1x_hdr *hdr;
712 const struct wpa_eapol_key *key;
716 /* TODO: Support other EAPOL packets than just EAPOL-Key */
718 if (len < sizeof(*hdr) + sizeof(*key))
721 hdr = (const struct ieee802_1x_hdr *) buf;
722 key = (const struct wpa_eapol_key *) (hdr + 1);
723 plen = be_to_host16(hdr->length);
725 if (hdr->version < EAPOL_VERSION) {
726 /* TODO: backwards compatibility */
728 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
729 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
730 "not a Key frame", hdr->type);
733 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
734 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
735 "invalid (frame size %lu)",
736 (unsigned long) plen, (unsigned long) len);
740 if (key->type != EAPOL_KEY_TYPE_RSN) {
741 wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
742 "discarded", key->type);
746 key_info = WPA_GET_BE16(key->key_info);
748 return !!(key_info & WPA_KEY_INFO_ACK);
752 static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
753 struct ibss_rsn_peer *peer,
754 const u8 *buf, size_t len)
759 supp = ibss_rsn_eapol_dst_supp(buf, len);
763 tmp = os_malloc(len);
766 os_memcpy(tmp, buf, len);
768 peer->authentication_status |= IBSS_RSN_AUTH_EAPOL_BY_PEER;
769 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant from "
770 MACSTR, MAC2STR(peer->addr));
771 wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
773 if (ibss_rsn_is_auth_started(peer) == 0) {
774 wpa_printf(MSG_DEBUG, "RSN: IBSS EAPOL for "
775 "Authenticator dropped as " MACSTR " is not "
776 "authenticated", MAC2STR(peer->addr));
781 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator "
782 "from "MACSTR, MAC2STR(peer->addr));
783 wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
791 int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
792 const u8 *buf, size_t len)
794 struct ibss_rsn_peer *peer;
796 if (ibss_rsn == NULL)
799 peer = ibss_rsn_get_peer(ibss_rsn, src_addr);
801 return ibss_rsn_process_rx_eapol(ibss_rsn, peer, buf, len);
803 if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
805 * Create new IBSS peer based on an EAPOL message from the peer
808 peer = ibss_rsn_peer_init(ibss_rsn, src_addr);
812 /* assume the peer is authenticated already */
813 wpa_printf(MSG_DEBUG, "RSN: IBSS Not using IBSS Auth for peer "
814 MACSTR, MAC2STR(src_addr));
815 ibss_rsn_peer_authenticated(ibss_rsn, peer,
816 IBSS_RSN_AUTH_EAPOL_BY_US);
818 return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
825 void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
827 if (ibss_rsn == NULL)
829 os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
833 static void ibss_rsn_handle_auth_1_of_2(struct ibss_rsn *ibss_rsn,
834 struct ibss_rsn_peer *peer,
837 wpa_printf(MSG_DEBUG, "RSN: IBSS RX Auth frame (SEQ 1) from " MACSTR,
841 peer->authentication_status & IBSS_RSN_AUTH_EAPOL_BY_PEER) {
842 if (peer->own_auth_tx.sec) {
843 struct os_reltime now, diff;
844 os_get_reltime(&now);
845 os_reltime_sub(&now, &peer->own_auth_tx, &diff);
846 if (diff.sec == 0 && diff.usec < 500000) {
847 wpa_printf(MSG_DEBUG, "RSN: Skip IBSS reinit since only %u usec from own Auth frame TX",
853 * A peer sent us an Authentication frame even though it already
854 * started an EAPOL session. We should reinit state machines
855 * here, but it's much more complicated than just deleting and
856 * recreating the state machine
858 wpa_printf(MSG_DEBUG, "RSN: IBSS Reinitializing station "
859 MACSTR, MAC2STR(addr));
861 ibss_rsn_stop(ibss_rsn, addr);
866 peer = ibss_rsn_peer_init(ibss_rsn, addr);
870 wpa_printf(MSG_DEBUG, "RSN: IBSS Auth started by peer " MACSTR,
875 /* reply with an Authentication frame now, before sending an EAPOL */
876 ibss_rsn_send_auth(ibss_rsn, addr, 2);
877 /* no need to start another AUTH challenge in the other way.. */
878 ibss_rsn_peer_authenticated(ibss_rsn, peer, IBSS_RSN_AUTH_EAPOL_BY_US);
882 void ibss_rsn_handle_auth(struct ibss_rsn *ibss_rsn, const u8 *auth_frame,
885 const struct ieee80211_mgmt *header;
886 struct ibss_rsn_peer *peer;
889 header = (const struct ieee80211_mgmt *) auth_frame;
890 auth_length = IEEE80211_HDRLEN + sizeof(header->u.auth);
892 if (ibss_rsn == NULL || len < auth_length)
895 if (le_to_host16(header->u.auth.auth_alg) != WLAN_AUTH_OPEN ||
896 le_to_host16(header->u.auth.status_code) != WLAN_STATUS_SUCCESS)
899 peer = ibss_rsn_get_peer(ibss_rsn, header->sa);
901 switch (le_to_host16(header->u.auth.auth_transaction)) {
903 ibss_rsn_handle_auth_1_of_2(ibss_rsn, peer, header->sa);
906 wpa_printf(MSG_DEBUG, "RSN: IBSS RX Auth frame (SEQ 2) from "
907 MACSTR, MAC2STR(header->sa));
909 wpa_printf(MSG_DEBUG, "RSN: Received Auth seq 2 from "
910 "unknown STA " MACSTR, MAC2STR(header->sa));
914 /* authentication has been completed */
915 eloop_cancel_timeout(ibss_rsn_auth_timeout, peer, NULL);
916 wpa_printf(MSG_DEBUG, "RSN: IBSS Auth completed with " MACSTR,
917 MAC2STR(header->sa));
918 ibss_rsn_peer_authenticated(ibss_rsn, peer,
919 IBSS_RSN_AUTH_BY_US);