2 * wpa_supplicant - IBSS RSN
3 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #include "l2_packet/l2_packet.h"
19 #include "wpa_supplicant_i.h"
22 #include "../hostapd/wpa.h"
26 static void ibss_rsn_free(struct ibss_rsn_peer
*peer
)
28 wpa_auth_sta_deinit(peer
->auth
);
29 wpa_sm_deinit(peer
->supp
);
34 static void supp_set_state(void *ctx
, wpa_states state
)
36 struct ibss_rsn_peer
*peer
= ctx
;
37 peer
->supp_state
= state
;
41 static int supp_ether_send(void *ctx
, const u8
*dest
, u16 proto
, const u8
*buf
,
44 struct ibss_rsn_peer
*peer
= ctx
;
45 struct wpa_supplicant
*wpa_s
= peer
->ibss_rsn
->wpa_s
;
47 wpa_printf(MSG_DEBUG
, "SUPP: %s(dest=" MACSTR
" proto=0x%04x "
49 __func__
, MAC2STR(dest
), proto
, (unsigned long) len
);
52 return l2_packet_send(wpa_s
->l2
, dest
, proto
, buf
, len
);
54 return wpa_drv_send_eapol(wpa_s
, dest
, proto
, buf
, len
);
58 static u8
* supp_alloc_eapol(void *ctx
, u8 type
, const void *data
,
59 u16 data_len
, size_t *msg_len
, void **data_pos
)
61 struct ieee802_1x_hdr
*hdr
;
63 wpa_printf(MSG_DEBUG
, "SUPP: %s(type=%d data_len=%d)",
64 __func__
, type
, data_len
);
66 *msg_len
= sizeof(*hdr
) + data_len
;
67 hdr
= os_malloc(*msg_len
);
73 hdr
->length
= host_to_be16(data_len
);
76 os_memcpy(hdr
+ 1, data
, data_len
);
78 os_memset(hdr
+ 1, 0, data_len
);
87 static int supp_get_beacon_ie(void *ctx
)
89 struct ibss_rsn_peer
*peer
= ctx
;
91 wpa_printf(MSG_DEBUG
, "SUPP: %s", __func__
);
92 /* TODO: get correct RSN IE */
93 return wpa_sm_set_ap_rsn_ie(peer
->supp
,
94 (u8
*) "\x30\x14\x01\x00"
96 "\x01\x00\x00\x0f\xac\x04"
97 "\x01\x00\x00\x0f\xac\x02"
102 static int supp_set_key(void *ctx
, wpa_alg alg
,
103 const u8
*addr
, int key_idx
, int set_tx
,
104 const u8
*seq
, size_t seq_len
,
105 const u8
*key
, size_t key_len
)
107 wpa_printf(MSG_DEBUG
, "SUPP: %s(alg=%d addr=" MACSTR
" key_idx=%d "
109 __func__
, alg
, MAC2STR(addr
), key_idx
, set_tx
);
110 wpa_hexdump(MSG_DEBUG
, "SUPP: set_key - seq", seq
, seq_len
);
111 wpa_hexdump(MSG_DEBUG
, "SUPP: set_key - key", key
, key_len
);
116 static void * supp_get_network_ctx(void *ctx
)
118 struct ibss_rsn_peer
*peer
= ctx
;
119 return wpa_supplicant_get_ssid(peer
->ibss_rsn
->wpa_s
);
123 static int supp_mlme_setprotection(void *ctx
, const u8
*addr
,
124 int protection_type
, int key_type
)
126 wpa_printf(MSG_DEBUG
, "SUPP: %s(addr=" MACSTR
" protection_type=%d "
128 __func__
, MAC2STR(addr
), protection_type
, key_type
);
133 static void supp_cancel_auth_timeout(void *ctx
)
135 wpa_printf(MSG_DEBUG
, "SUPP: %s", __func__
);
139 int ibss_rsn_supp_init(struct ibss_rsn_peer
*peer
, const u8
*own_addr
,
142 struct wpa_sm_ctx
*ctx
= os_zalloc(sizeof(*ctx
));
147 ctx
->set_state
= supp_set_state
;
148 ctx
->ether_send
= supp_ether_send
;
149 ctx
->get_beacon_ie
= supp_get_beacon_ie
;
150 ctx
->alloc_eapol
= supp_alloc_eapol
;
151 ctx
->set_key
= supp_set_key
;
152 ctx
->get_network_ctx
= supp_get_network_ctx
;
153 ctx
->mlme_setprotection
= supp_mlme_setprotection
;
154 ctx
->cancel_auth_timeout
= supp_cancel_auth_timeout
;
155 peer
->supp
= wpa_sm_init(ctx
);
156 if (peer
->supp
== NULL
) {
157 wpa_printf(MSG_DEBUG
, "SUPP: wpa_sm_init() failed");
161 wpa_sm_set_own_addr(peer
->supp
, own_addr
);
162 wpa_sm_set_param(peer
->supp
, WPA_PARAM_RSN_ENABLED
, 1);
163 wpa_sm_set_param(peer
->supp
, WPA_PARAM_PROTO
, WPA_PROTO_RSN
);
164 wpa_sm_set_param(peer
->supp
, WPA_PARAM_PAIRWISE
, WPA_CIPHER_CCMP
);
165 wpa_sm_set_param(peer
->supp
, WPA_PARAM_GROUP
, WPA_CIPHER_CCMP
);
166 wpa_sm_set_param(peer
->supp
, WPA_PARAM_KEY_MGMT
, WPA_KEY_MGMT_PSK
);
167 wpa_sm_set_pmk(peer
->supp
, psk
, PMK_LEN
);
169 peer
->supp_ie_len
= sizeof(peer
->supp_ie
);
170 if (wpa_sm_set_assoc_wpa_ie_default(peer
->supp
, peer
->supp_ie
,
171 &peer
->supp_ie_len
) < 0) {
172 wpa_printf(MSG_DEBUG
, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
177 wpa_sm_notify_assoc(peer
->supp
, peer
->addr
);
183 static void auth_logger(void *ctx
, const u8
*addr
, logger_level level
,
187 wpa_printf(MSG_DEBUG
, "AUTH: " MACSTR
" - %s",
190 wpa_printf(MSG_DEBUG
, "AUTH: %s", txt
);
194 static const u8
* auth_get_psk(void *ctx
, const u8
*addr
, const u8
*prev_psk
)
196 struct ibss_rsn
*ibss_rsn
= ctx
;
197 wpa_printf(MSG_DEBUG
, "AUTH: %s (addr=" MACSTR
" prev_psk=%p)",
198 __func__
, MAC2STR(addr
), prev_psk
);
201 return ibss_rsn
->psk
;
205 static int auth_send_eapol(void *ctx
, const u8
*addr
, const u8
*data
,
206 size_t data_len
, int encrypt
)
208 struct ibss_rsn
*ibss_rsn
= ctx
;
209 struct wpa_supplicant
*wpa_s
= ibss_rsn
->wpa_s
;
211 wpa_printf(MSG_DEBUG
, "AUTH: %s(addr=" MACSTR
" data_len=%lu "
213 __func__
, MAC2STR(addr
), (unsigned long) data_len
, encrypt
);
216 return l2_packet_send(wpa_s
->l2
, addr
, ETH_P_EAPOL
, data
,
219 return wpa_drv_send_eapol(wpa_s
, addr
, ETH_P_EAPOL
, data
, data_len
);
223 static int ibss_rsn_auth_init_group(struct ibss_rsn
*ibss_rsn
,
226 struct wpa_auth_config conf
;
227 struct wpa_auth_callbacks cb
;
229 wpa_printf(MSG_DEBUG
, "AUTH: Initializing group state machine");
231 os_memset(&conf
, 0, sizeof(conf
));
233 conf
.wpa_key_mgmt
= WPA_KEY_MGMT_PSK
;
234 conf
.wpa_pairwise
= WPA_CIPHER_CCMP
;
235 conf
.rsn_pairwise
= WPA_CIPHER_CCMP
;
236 conf
.wpa_group
= WPA_CIPHER_CCMP
;
237 conf
.eapol_version
= 2;
239 os_memset(&cb
, 0, sizeof(cb
));
241 cb
.logger
= auth_logger
;
242 cb
.send_eapol
= auth_send_eapol
;
243 cb
.get_psk
= auth_get_psk
;
245 ibss_rsn
->auth_group
= wpa_init(own_addr
, &conf
, &cb
);
246 if (ibss_rsn
->auth_group
== NULL
) {
247 wpa_printf(MSG_DEBUG
, "AUTH: wpa_init() failed");
255 static int ibss_rsn_auth_init(struct ibss_rsn
*ibss_rsn
,
256 struct ibss_rsn_peer
*peer
)
258 peer
->auth
= wpa_auth_sta_init(ibss_rsn
->auth_group
, peer
->addr
);
259 if (peer
->auth
== NULL
) {
260 wpa_printf(MSG_DEBUG
, "AUTH: wpa_auth_sta_init() failed");
264 /* TODO: get peer RSN IE with Probe Request */
265 if (wpa_validate_wpa_ie(ibss_rsn
->auth_group
, peer
->auth
,
266 (u8
*) "\x30\x14\x01\x00"
268 "\x01\x00\x00\x0f\xac\x04"
269 "\x01\x00\x00\x0f\xac\x02"
270 "\x00\x00", 22, NULL
, 0) !=
272 wpa_printf(MSG_DEBUG
, "AUTH: wpa_validate_wpa_ie() failed");
276 wpa_auth_sm_event(peer
->auth
, WPA_ASSOC
);
278 wpa_auth_sta_associated(ibss_rsn
->auth_group
, peer
->auth
);
284 int ibss_rsn_start(struct ibss_rsn
*ibss_rsn
, const u8
*addr
)
286 struct ibss_rsn_peer
*peer
;
288 wpa_printf(MSG_DEBUG
, "RSN: Starting IBSS Authenticator and "
289 "Supplicant for peer " MACSTR
, MAC2STR(addr
));
291 peer
= os_zalloc(sizeof(*peer
));
295 peer
->ibss_rsn
= ibss_rsn
;
296 os_memcpy(peer
->addr
, addr
, ETH_ALEN
);
298 if (ibss_rsn_supp_init(peer
, ibss_rsn
->wpa_s
->own_addr
, ibss_rsn
->psk
)
304 if (ibss_rsn_auth_init(ibss_rsn
, peer
) < 0) {
309 peer
->next
= ibss_rsn
->peers
;
310 ibss_rsn
->peers
= peer
;
316 struct ibss_rsn
* ibss_rsn_init(struct wpa_supplicant
*wpa_s
)
318 struct ibss_rsn
*ibss_rsn
;
320 ibss_rsn
= os_zalloc(sizeof(*ibss_rsn
));
321 if (ibss_rsn
== NULL
)
323 ibss_rsn
->wpa_s
= wpa_s
;
325 if (ibss_rsn_auth_init_group(ibss_rsn
, wpa_s
->own_addr
) < 0) {
326 ibss_rsn_deinit(ibss_rsn
);
334 void ibss_rsn_deinit(struct ibss_rsn
*ibss_rsn
)
336 struct ibss_rsn_peer
*peer
, *prev
;
338 if (ibss_rsn
== NULL
)
341 peer
= ibss_rsn
->peers
;
348 wpa_deinit(ibss_rsn
->auth_group
);
354 static int ibss_rsn_eapol_dst_supp(const u8
*buf
, size_t len
)
356 const struct ieee802_1x_hdr
*hdr
;
357 const struct wpa_eapol_key
*key
;
361 /* TODO: Support other EAPOL packets than just EAPOL-Key */
363 if (len
< sizeof(*hdr
) + sizeof(*key
))
366 hdr
= (const struct ieee802_1x_hdr
*) buf
;
367 key
= (const struct wpa_eapol_key
*) (hdr
+ 1);
368 plen
= be_to_host16(hdr
->length
);
370 if (hdr
->version
< EAPOL_VERSION
) {
371 /* TODO: backwards compatibility */
373 if (hdr
->type
!= IEEE802_1X_TYPE_EAPOL_KEY
) {
374 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame (type %u) discarded, "
375 "not a Key frame", hdr
->type
);
378 if (plen
> len
- sizeof(*hdr
) || plen
< sizeof(*key
)) {
379 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame payload size %lu "
380 "invalid (frame size %lu)",
381 (unsigned long) plen
, (unsigned long) len
);
385 if (key
->type
!= EAPOL_KEY_TYPE_RSN
) {
386 wpa_printf(MSG_DEBUG
, "RSN: EAPOL-Key type (%d) unknown, "
387 "discarded", key
->type
);
391 key_info
= WPA_GET_BE16(key
->key_info
);
393 return !!(key_info
& WPA_KEY_INFO_ACK
);
397 static int ibss_rsn_process_rx_eapol(struct ibss_rsn
*ibss_rsn
,
398 struct ibss_rsn_peer
*peer
,
399 const u8
*buf
, size_t len
)
404 supp
= ibss_rsn_eapol_dst_supp(buf
, len
);
408 tmp
= os_malloc(len
);
411 os_memcpy(tmp
, buf
, len
);
413 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Supplicant");
414 wpa_sm_rx_eapol(peer
->supp
, peer
->addr
, tmp
, len
);
416 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Authenticator");
417 wpa_receive(ibss_rsn
->auth_group
, peer
->auth
, tmp
, len
);
425 int ibss_rsn_rx_eapol(struct ibss_rsn
*ibss_rsn
, const u8
*src_addr
,
426 const u8
*buf
, size_t len
)
428 struct ibss_rsn_peer
*peer
;
430 for (peer
= ibss_rsn
->peers
; peer
; peer
= peer
->next
) {
431 if (os_memcmp(src_addr
, peer
->addr
, ETH_ALEN
) == 0)
432 return ibss_rsn_process_rx_eapol(ibss_rsn
, peer
,
436 if (ibss_rsn_eapol_dst_supp(buf
, len
) > 0) {
438 * Create new IBSS peer based on an EAPOL message from the peer
441 if (ibss_rsn_start(ibss_rsn
, src_addr
) < 0)
443 return ibss_rsn_process_rx_eapol(ibss_rsn
, ibss_rsn
->peers
,
451 void ibss_rsn_set_psk(struct ibss_rsn
*ibss_rsn
, const u8
*psk
)
453 os_memcpy(ibss_rsn
->psk
, psk
, PMK_LEN
);