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
, u16 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
,
263 size_t *psk_len
, int *vlan_id
)
265 struct ibss_rsn
*ibss_rsn
= ctx
;
271 wpa_printf(MSG_DEBUG
, "AUTH: %s (addr=" MACSTR
" prev_psk=%p)",
272 __func__
, MAC2STR(addr
), prev_psk
);
275 return ibss_rsn
->psk
;
279 static int auth_send_eapol(void *ctx
, const u8
*addr
, const u8
*data
,
280 size_t data_len
, int encrypt
)
282 struct ibss_rsn
*ibss_rsn
= ctx
;
283 struct wpa_supplicant
*wpa_s
= ibss_rsn
->wpa_s
;
285 wpa_printf(MSG_DEBUG
, "AUTH: %s(addr=" MACSTR
" data_len=%lu "
287 __func__
, MAC2STR(addr
), (unsigned long) data_len
, encrypt
);
290 return l2_packet_send(wpa_s
->l2
, addr
, ETH_P_EAPOL
, data
,
297 static int auth_set_key(void *ctx
, int vlan_id
, enum wpa_alg alg
,
298 const u8
*addr
, int idx
, u8
*key
, size_t key_len
)
300 struct ibss_rsn
*ibss_rsn
= ctx
;
303 os_memset(seq
, 0, sizeof(seq
));
306 wpa_printf(MSG_DEBUG
, "AUTH: %s(alg=%d addr=" MACSTR
308 __func__
, alg
, MAC2STR(addr
), idx
);
310 wpa_printf(MSG_DEBUG
, "AUTH: %s(alg=%d key_idx=%d)",
313 wpa_hexdump_key(MSG_DEBUG
, "AUTH: set_key - key", key
, key_len
);
317 struct ibss_rsn_peer
*peer
;
318 peer
= ibss_rsn_get_peer(ibss_rsn
, addr
);
320 peer
->authentication_status
|=
321 IBSS_RSN_SET_PTK_AUTH
;
322 ibss_check_rsn_completed(peer
);
326 * In IBSS RSN, the pairwise key from the 4-way handshake
327 * initiated by the peer with highest MAC address is used.
330 os_memcmp(ibss_rsn
->wpa_s
->own_addr
, addr
, ETH_ALEN
) < 0) {
331 wpa_printf(MSG_DEBUG
, "AUTH: Do not use this PTK");
336 return wpa_drv_set_key(ibss_rsn
->wpa_s
, alg
, addr
, idx
,
337 1, seq
, 6, key
, key_len
);
341 static void ibss_rsn_disconnect(void *ctx
, const u8
*addr
, u16 reason
)
343 struct ibss_rsn
*ibss_rsn
= ctx
;
344 wpa_drv_sta_deauth(ibss_rsn
->wpa_s
, addr
, reason
);
348 static int auth_for_each_sta(void *ctx
, int (*cb
)(struct wpa_state_machine
*sm
,
352 struct ibss_rsn
*ibss_rsn
= ctx
;
353 struct ibss_rsn_peer
*peer
;
355 wpa_printf(MSG_DEBUG
, "AUTH: for_each_sta");
357 for (peer
= ibss_rsn
->peers
; peer
; peer
= peer
->next
) {
358 if (peer
->auth
&& cb(peer
->auth
, cb_ctx
))
366 static void ibss_set_sta_authorized(struct ibss_rsn
*ibss_rsn
,
367 struct ibss_rsn_peer
*peer
, int authorized
)
372 res
= wpa_drv_sta_set_flags(ibss_rsn
->wpa_s
, peer
->addr
,
374 WPA_STA_AUTHORIZED
, ~0);
375 wpa_printf(MSG_DEBUG
, "AUTH: " MACSTR
" authorizing port",
376 MAC2STR(peer
->addr
));
378 res
= wpa_drv_sta_set_flags(ibss_rsn
->wpa_s
, peer
->addr
,
379 0, 0, ~WPA_STA_AUTHORIZED
);
380 wpa_printf(MSG_DEBUG
, "AUTH: " MACSTR
" unauthorizing port",
381 MAC2STR(peer
->addr
));
384 if (res
&& errno
!= ENOENT
) {
385 wpa_printf(MSG_DEBUG
, "Could not set station " MACSTR
" flags "
386 "for kernel driver (errno=%d)",
387 MAC2STR(peer
->addr
), errno
);
392 static void auth_set_eapol(void *ctx
, const u8
*addr
,
393 wpa_eapol_variable var
, int value
)
395 struct ibss_rsn
*ibss_rsn
= ctx
;
396 struct ibss_rsn_peer
*peer
= ibss_rsn_get_peer(ibss_rsn
, addr
);
402 case WPA_EAPOL_authorized
:
403 ibss_set_sta_authorized(ibss_rsn
, peer
, value
);
406 /* do not handle any other event */
407 wpa_printf(MSG_DEBUG
, "AUTH: eapol event not handled %d", var
);
413 static int ibss_rsn_auth_init_group(struct ibss_rsn
*ibss_rsn
,
414 const u8
*own_addr
, struct wpa_ssid
*ssid
)
416 struct wpa_auth_config conf
;
417 static const struct wpa_auth_callbacks cb
= {
418 .logger
= auth_logger
,
419 .set_eapol
= auth_set_eapol
,
420 .send_eapol
= auth_send_eapol
,
421 .get_psk
= auth_get_psk
,
422 .set_key
= auth_set_key
,
423 .for_each_sta
= auth_for_each_sta
,
424 .disconnect
= ibss_rsn_disconnect
,
427 wpa_printf(MSG_DEBUG
, "AUTH: Initializing group state machine");
429 os_memset(&conf
, 0, sizeof(conf
));
431 conf
.wpa_key_mgmt
= WPA_KEY_MGMT_PSK
;
432 conf
.wpa_pairwise
= WPA_CIPHER_CCMP
;
433 conf
.rsn_pairwise
= WPA_CIPHER_CCMP
;
434 conf
.wpa_group
= WPA_CIPHER_CCMP
;
435 conf
.eapol_version
= 2;
436 conf
.wpa_group_rekey
= ssid
->group_rekey
? ssid
->group_rekey
: 600;
437 conf
.wpa_group_update_count
= 4;
438 conf
.wpa_pairwise_update_count
= 4;
440 ibss_rsn
->auth_group
= wpa_init(own_addr
, &conf
, &cb
, ibss_rsn
);
441 if (ibss_rsn
->auth_group
== NULL
) {
442 wpa_printf(MSG_DEBUG
, "AUTH: wpa_init() failed");
446 wpa_init_keys(ibss_rsn
->auth_group
);
452 static int ibss_rsn_auth_init(struct ibss_rsn
*ibss_rsn
,
453 struct ibss_rsn_peer
*peer
)
455 peer
->auth
= wpa_auth_sta_init(ibss_rsn
->auth_group
, peer
->addr
, NULL
);
456 if (peer
->auth
== NULL
) {
457 wpa_printf(MSG_DEBUG
, "AUTH: wpa_auth_sta_init() failed");
461 /* TODO: get peer RSN IE with Probe Request */
462 if (wpa_validate_wpa_ie(ibss_rsn
->auth_group
, peer
->auth
, 0,
463 (u8
*) "\x30\x14\x01\x00"
465 "\x01\x00\x00\x0f\xac\x04"
466 "\x01\x00\x00\x0f\xac\x02"
467 "\x00\x00", 22, NULL
, 0, NULL
, 0) !=
469 wpa_printf(MSG_DEBUG
, "AUTH: wpa_validate_wpa_ie() failed");
473 if (wpa_auth_sm_event(peer
->auth
, WPA_ASSOC
))
476 if (wpa_auth_sta_associated(ibss_rsn
->auth_group
, peer
->auth
))
483 static int ibss_rsn_send_auth(struct ibss_rsn
*ibss_rsn
, const u8
*da
, int seq
)
485 struct ieee80211_mgmt auth
;
486 const size_t auth_length
= IEEE80211_HDRLEN
+ sizeof(auth
.u
.auth
);
487 struct wpa_supplicant
*wpa_s
= ibss_rsn
->wpa_s
;
489 if (wpa_s
->driver
->send_frame
== NULL
)
492 os_memset(&auth
, 0, sizeof(auth
));
494 auth
.frame_control
= IEEE80211_FC(WLAN_FC_TYPE_MGMT
,
496 os_memcpy(auth
.da
, da
, ETH_ALEN
);
497 os_memcpy(auth
.sa
, wpa_s
->own_addr
, ETH_ALEN
);
498 os_memcpy(auth
.bssid
, wpa_s
->bssid
, ETH_ALEN
);
500 auth
.u
.auth
.auth_alg
= host_to_le16(WLAN_AUTH_OPEN
);
501 auth
.u
.auth
.auth_transaction
= host_to_le16(seq
);
502 auth
.u
.auth
.status_code
= host_to_le16(WLAN_STATUS_SUCCESS
);
504 wpa_printf(MSG_DEBUG
, "RSN: IBSS TX Auth frame (SEQ %d) to " MACSTR
,
507 return wpa_s
->driver
->send_frame(wpa_s
->drv_priv
, (u8
*) &auth
,
512 static int ibss_rsn_is_auth_started(struct ibss_rsn_peer
* peer
)
514 return peer
->authentication_status
&
515 (IBSS_RSN_AUTH_BY_US
| IBSS_RSN_AUTH_EAPOL_BY_US
);
519 static struct ibss_rsn_peer
*
520 ibss_rsn_peer_init(struct ibss_rsn
*ibss_rsn
, const u8
*addr
)
522 struct ibss_rsn_peer
*peer
;
523 if (ibss_rsn
== NULL
)
526 peer
= ibss_rsn_get_peer(ibss_rsn
, addr
);
528 wpa_printf(MSG_DEBUG
, "RSN: IBSS Supplicant for peer "MACSTR
529 " already running", MAC2STR(addr
));
533 wpa_printf(MSG_DEBUG
, "RSN: Starting IBSS Supplicant for peer "MACSTR
,
536 peer
= os_zalloc(sizeof(*peer
));
538 wpa_printf(MSG_DEBUG
, "RSN: Could not allocate memory.");
542 peer
->ibss_rsn
= ibss_rsn
;
543 os_memcpy(peer
->addr
, addr
, ETH_ALEN
);
544 peer
->authentication_status
= IBSS_RSN_AUTH_NOT_AUTHENTICATED
;
546 if (ibss_rsn_supp_init(peer
, ibss_rsn
->wpa_s
->own_addr
,
547 ibss_rsn
->psk
) < 0) {
552 peer
->next
= ibss_rsn
->peers
;
553 ibss_rsn
->peers
= peer
;
559 static void ibss_rsn_auth_timeout(void *eloop_ctx
, void *timeout_ctx
)
561 struct ibss_rsn_peer
*peer
= eloop_ctx
;
564 * Assume peer does not support Authentication exchange or the frame was
565 * lost somewhere - start EAPOL Authenticator.
567 wpa_printf(MSG_DEBUG
,
568 "RSN: Timeout on waiting Authentication frame response from "
569 MACSTR
" - start authenticator", MAC2STR(peer
->addr
));
571 peer
->authentication_status
|= IBSS_RSN_AUTH_BY_US
;
572 ibss_rsn_auth_init(peer
->ibss_rsn
, peer
);
576 int ibss_rsn_start(struct ibss_rsn
*ibss_rsn
, const u8
*addr
)
578 struct ibss_rsn_peer
*peer
;
584 /* if the peer already exists, exit immediately */
585 peer
= ibss_rsn_get_peer(ibss_rsn
, addr
);
589 peer
= ibss_rsn_peer_init(ibss_rsn
, addr
);
593 /* Open Authentication: send first Authentication frame */
594 res
= ibss_rsn_send_auth(ibss_rsn
, addr
, 1);
597 * The driver may not support Authentication frame exchange in
598 * IBSS. Ignore authentication and go through EAPOL exchange.
600 peer
->authentication_status
|= IBSS_RSN_AUTH_BY_US
;
601 return ibss_rsn_auth_init(ibss_rsn
, peer
);
603 os_get_reltime(&peer
->own_auth_tx
);
604 eloop_register_timeout(1, 0, ibss_rsn_auth_timeout
, peer
, NULL
);
611 static int ibss_rsn_peer_authenticated(struct ibss_rsn
*ibss_rsn
,
612 struct ibss_rsn_peer
*peer
, int reason
)
616 if (ibss_rsn
== NULL
|| peer
== NULL
)
619 already_started
= ibss_rsn_is_auth_started(peer
);
620 peer
->authentication_status
|= reason
;
622 if (already_started
) {
623 wpa_printf(MSG_DEBUG
, "RSN: IBSS Authenticator already "
624 "started for peer " MACSTR
, MAC2STR(peer
->addr
));
628 wpa_printf(MSG_DEBUG
, "RSN: Starting IBSS Authenticator "
629 "for now-authenticated peer " MACSTR
, MAC2STR(peer
->addr
));
631 return ibss_rsn_auth_init(ibss_rsn
, peer
);
635 void ibss_rsn_stop(struct ibss_rsn
*ibss_rsn
, const u8
*peermac
)
637 struct ibss_rsn_peer
*peer
, *prev
;
639 if (ibss_rsn
== NULL
)
642 if (peermac
== NULL
) {
643 /* remove all peers */
644 wpa_printf(MSG_DEBUG
, "%s: Remove all peers", __func__
);
645 peer
= ibss_rsn
->peers
;
650 ibss_rsn
->peers
= peer
;
653 /* remove specific peer */
654 wpa_printf(MSG_DEBUG
, "%s: Remove specific peer " MACSTR
,
655 __func__
, MAC2STR(peermac
));
657 for (prev
= NULL
, peer
= ibss_rsn
->peers
; peer
!= NULL
;
658 prev
= peer
, peer
= peer
->next
) {
659 if (os_memcmp(peermac
, peer
->addr
, ETH_ALEN
) == 0) {
661 ibss_rsn
->peers
= peer
->next
;
663 prev
->next
= peer
->next
;
665 wpa_printf(MSG_DEBUG
, "%s: Successfully "
666 "removed a specific peer",
675 struct ibss_rsn
* ibss_rsn_init(struct wpa_supplicant
*wpa_s
,
676 struct wpa_ssid
*ssid
)
678 struct ibss_rsn
*ibss_rsn
;
680 ibss_rsn
= os_zalloc(sizeof(*ibss_rsn
));
681 if (ibss_rsn
== NULL
)
683 ibss_rsn
->wpa_s
= wpa_s
;
685 if (ibss_rsn_auth_init_group(ibss_rsn
, wpa_s
->own_addr
, ssid
) < 0) {
686 ibss_rsn_deinit(ibss_rsn
);
694 void ibss_rsn_deinit(struct ibss_rsn
*ibss_rsn
)
696 struct ibss_rsn_peer
*peer
, *prev
;
698 if (ibss_rsn
== NULL
)
701 peer
= ibss_rsn
->peers
;
708 if (ibss_rsn
->auth_group
)
709 wpa_deinit(ibss_rsn
->auth_group
);
715 static int ibss_rsn_eapol_dst_supp(const u8
*buf
, size_t len
)
717 const struct ieee802_1x_hdr
*hdr
;
718 const struct wpa_eapol_key
*key
;
722 /* TODO: Support other EAPOL packets than just EAPOL-Key */
724 if (len
< sizeof(*hdr
) + sizeof(*key
))
727 hdr
= (const struct ieee802_1x_hdr
*) buf
;
728 key
= (const struct wpa_eapol_key
*) (hdr
+ 1);
729 plen
= be_to_host16(hdr
->length
);
731 if (hdr
->version
< EAPOL_VERSION
) {
732 /* TODO: backwards compatibility */
734 if (hdr
->type
!= IEEE802_1X_TYPE_EAPOL_KEY
) {
735 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame (type %u) discarded, "
736 "not a Key frame", hdr
->type
);
739 if (plen
> len
- sizeof(*hdr
) || plen
< sizeof(*key
)) {
740 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame payload size %lu "
741 "invalid (frame size %lu)",
742 (unsigned long) plen
, (unsigned long) len
);
746 if (key
->type
!= EAPOL_KEY_TYPE_RSN
) {
747 wpa_printf(MSG_DEBUG
, "RSN: EAPOL-Key type (%d) unknown, "
748 "discarded", key
->type
);
752 key_info
= WPA_GET_BE16(key
->key_info
);
754 return !!(key_info
& WPA_KEY_INFO_ACK
);
758 static int ibss_rsn_process_rx_eapol(struct ibss_rsn
*ibss_rsn
,
759 struct ibss_rsn_peer
*peer
,
760 const u8
*buf
, size_t len
)
765 supp
= ibss_rsn_eapol_dst_supp(buf
, len
);
769 tmp
= os_memdup(buf
, len
);
773 peer
->authentication_status
|= IBSS_RSN_AUTH_EAPOL_BY_PEER
;
774 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Supplicant from "
775 MACSTR
, MAC2STR(peer
->addr
));
776 wpa_sm_rx_eapol(peer
->supp
, peer
->addr
, tmp
, len
);
778 if (ibss_rsn_is_auth_started(peer
) == 0) {
779 wpa_printf(MSG_DEBUG
, "RSN: IBSS EAPOL for "
780 "Authenticator dropped as " MACSTR
" is not "
781 "authenticated", MAC2STR(peer
->addr
));
786 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Authenticator "
787 "from "MACSTR
, MAC2STR(peer
->addr
));
788 wpa_receive(ibss_rsn
->auth_group
, peer
->auth
, tmp
, len
);
796 int ibss_rsn_rx_eapol(struct ibss_rsn
*ibss_rsn
, const u8
*src_addr
,
797 const u8
*buf
, size_t len
)
799 struct ibss_rsn_peer
*peer
;
801 if (ibss_rsn
== NULL
)
804 peer
= ibss_rsn_get_peer(ibss_rsn
, src_addr
);
806 return ibss_rsn_process_rx_eapol(ibss_rsn
, peer
, buf
, len
);
808 if (ibss_rsn_eapol_dst_supp(buf
, len
) > 0) {
810 * Create new IBSS peer based on an EAPOL message from the peer
813 peer
= ibss_rsn_peer_init(ibss_rsn
, src_addr
);
817 /* assume the peer is authenticated already */
818 wpa_printf(MSG_DEBUG
, "RSN: IBSS Not using IBSS Auth for peer "
819 MACSTR
, MAC2STR(src_addr
));
820 ibss_rsn_peer_authenticated(ibss_rsn
, peer
,
821 IBSS_RSN_AUTH_EAPOL_BY_US
);
823 return ibss_rsn_process_rx_eapol(ibss_rsn
, ibss_rsn
->peers
,
830 void ibss_rsn_set_psk(struct ibss_rsn
*ibss_rsn
, const u8
*psk
)
832 if (ibss_rsn
== NULL
)
834 os_memcpy(ibss_rsn
->psk
, psk
, PMK_LEN
);
838 static void ibss_rsn_handle_auth_1_of_2(struct ibss_rsn
*ibss_rsn
,
839 struct ibss_rsn_peer
*peer
,
842 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX Auth frame (SEQ 1) from " MACSTR
,
846 peer
->authentication_status
& (IBSS_RSN_SET_PTK_SUPP
|
847 IBSS_RSN_SET_PTK_AUTH
)) {
848 /* Clear the TK for this pair to allow recovery from the case
849 * where the peer STA has restarted and lost its key while we
850 * still have a pairwise key configured. */
851 wpa_printf(MSG_DEBUG
, "RSN: Clear pairwise key for peer "
852 MACSTR
, MAC2STR(addr
));
853 wpa_drv_set_key(ibss_rsn
->wpa_s
, WPA_ALG_NONE
, addr
, 0, 0,
858 peer
->authentication_status
& IBSS_RSN_AUTH_EAPOL_BY_PEER
) {
859 if (peer
->own_auth_tx
.sec
) {
860 struct os_reltime now
, diff
;
861 os_get_reltime(&now
);
862 os_reltime_sub(&now
, &peer
->own_auth_tx
, &diff
);
863 if (diff
.sec
== 0 && diff
.usec
< 500000) {
864 wpa_printf(MSG_DEBUG
, "RSN: Skip IBSS reinit since only %u usec from own Auth frame TX",
870 * A peer sent us an Authentication frame even though it already
871 * started an EAPOL session. We should reinit state machines
872 * here, but it's much more complicated than just deleting and
873 * recreating the state machine
875 wpa_printf(MSG_DEBUG
, "RSN: IBSS Reinitializing station "
876 MACSTR
, MAC2STR(addr
));
878 ibss_rsn_stop(ibss_rsn
, addr
);
883 peer
= ibss_rsn_peer_init(ibss_rsn
, addr
);
887 wpa_printf(MSG_DEBUG
, "RSN: IBSS Auth started by peer " MACSTR
,
892 /* reply with an Authentication frame now, before sending an EAPOL */
893 ibss_rsn_send_auth(ibss_rsn
, addr
, 2);
894 /* no need to start another AUTH challenge in the other way.. */
895 ibss_rsn_peer_authenticated(ibss_rsn
, peer
, IBSS_RSN_AUTH_EAPOL_BY_US
);
899 void ibss_rsn_handle_auth(struct ibss_rsn
*ibss_rsn
, const u8
*auth_frame
,
902 const struct ieee80211_mgmt
*header
;
903 struct ibss_rsn_peer
*peer
;
906 header
= (const struct ieee80211_mgmt
*) auth_frame
;
907 auth_length
= IEEE80211_HDRLEN
+ sizeof(header
->u
.auth
);
909 if (ibss_rsn
== NULL
|| len
< auth_length
)
912 if (le_to_host16(header
->u
.auth
.auth_alg
) != WLAN_AUTH_OPEN
||
913 le_to_host16(header
->u
.auth
.status_code
) != WLAN_STATUS_SUCCESS
)
916 peer
= ibss_rsn_get_peer(ibss_rsn
, header
->sa
);
918 switch (le_to_host16(header
->u
.auth
.auth_transaction
)) {
920 ibss_rsn_handle_auth_1_of_2(ibss_rsn
, peer
, header
->sa
);
923 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX Auth frame (SEQ 2) from "
924 MACSTR
, MAC2STR(header
->sa
));
926 wpa_printf(MSG_DEBUG
, "RSN: Received Auth seq 2 from "
927 "unknown STA " MACSTR
, MAC2STR(header
->sa
));
931 /* authentication has been completed */
932 eloop_cancel_timeout(ibss_rsn_auth_timeout
, peer
, NULL
);
933 wpa_printf(MSG_DEBUG
, "RSN: IBSS Auth completed with " MACSTR
,
934 MAC2STR(header
->sa
));
935 ibss_rsn_peer_authenticated(ibss_rsn
, peer
,
936 IBSS_RSN_AUTH_BY_US
);