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 wpa_printf(MSG_DEBUG
, "SUPP: %s", __func__
);
95 static int supp_set_key(void *ctx
, wpa_alg alg
,
96 const u8
*addr
, int key_idx
, int set_tx
,
97 const u8
*seq
, size_t seq_len
,
98 const u8
*key
, size_t key_len
)
100 wpa_printf(MSG_DEBUG
, "SUPP: %s(alg=%d addr=" MACSTR
" key_idx=%d "
102 __func__
, alg
, MAC2STR(addr
), key_idx
, set_tx
);
103 wpa_hexdump(MSG_DEBUG
, "SUPP: set_key - seq", seq
, seq_len
);
104 wpa_hexdump(MSG_DEBUG
, "SUPP: set_key - key", key
, key_len
);
109 static void * supp_get_network_ctx(void *ctx
)
111 struct ibss_rsn_peer
*peer
= ctx
;
112 return wpa_supplicant_get_ssid(peer
->ibss_rsn
->wpa_s
);
116 static int supp_mlme_setprotection(void *ctx
, const u8
*addr
,
117 int protection_type
, int key_type
)
119 wpa_printf(MSG_DEBUG
, "SUPP: %s(addr=" MACSTR
" protection_type=%d "
121 __func__
, MAC2STR(addr
), protection_type
, key_type
);
126 static void supp_cancel_auth_timeout(void *ctx
)
128 wpa_printf(MSG_DEBUG
, "SUPP: %s", __func__
);
132 int ibss_rsn_supp_init(struct ibss_rsn_peer
*peer
, const u8
*own_addr
,
135 struct wpa_sm_ctx
*ctx
= os_zalloc(sizeof(*ctx
));
140 ctx
->set_state
= supp_set_state
;
141 ctx
->ether_send
= supp_ether_send
;
142 ctx
->get_beacon_ie
= supp_get_beacon_ie
;
143 ctx
->alloc_eapol
= supp_alloc_eapol
;
144 ctx
->set_key
= supp_set_key
;
145 ctx
->get_network_ctx
= supp_get_network_ctx
;
146 ctx
->mlme_setprotection
= supp_mlme_setprotection
;
147 ctx
->cancel_auth_timeout
= supp_cancel_auth_timeout
;
148 peer
->supp
= wpa_sm_init(ctx
);
149 if (peer
->supp
== NULL
) {
150 wpa_printf(MSG_DEBUG
, "SUPP: wpa_sm_init() failed");
154 wpa_sm_set_own_addr(peer
->supp
, own_addr
);
155 wpa_sm_set_param(peer
->supp
, WPA_PARAM_RSN_ENABLED
, 1);
156 wpa_sm_set_param(peer
->supp
, WPA_PARAM_PROTO
, WPA_PROTO_RSN
);
157 wpa_sm_set_param(peer
->supp
, WPA_PARAM_PAIRWISE
, WPA_CIPHER_CCMP
);
158 wpa_sm_set_param(peer
->supp
, WPA_PARAM_GROUP
, WPA_CIPHER_CCMP
);
159 wpa_sm_set_param(peer
->supp
, WPA_PARAM_KEY_MGMT
, WPA_KEY_MGMT_PSK
);
160 wpa_sm_set_pmk(peer
->supp
, psk
, PMK_LEN
);
163 peer
->supp_ie_len
= sizeof(peer
->supp_ie
);
164 if (wpa_sm_set_assoc_wpa_ie_default(peer
->supp
, peer
->supp_ie
,
165 &peer
->supp_ie_len
) < 0) {
166 wpa_printf(MSG_DEBUG
, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
172 wpa_sm_notify_assoc(peer
->supp
, peer
->addr
);
178 static void auth_logger(void *ctx
, const u8
*addr
, logger_level level
,
182 wpa_printf(MSG_DEBUG
, "AUTH: " MACSTR
" - %s",
185 wpa_printf(MSG_DEBUG
, "AUTH: %s", txt
);
189 static const u8
* auth_get_psk(void *ctx
, const u8
*addr
, const u8
*prev_psk
)
191 struct ibss_rsn
*ibss_rsn
= ctx
;
192 wpa_printf(MSG_DEBUG
, "AUTH: %s (addr=" MACSTR
" prev_psk=%p)",
193 __func__
, MAC2STR(addr
), prev_psk
);
196 return ibss_rsn
->psk
;
200 static int auth_send_eapol(void *ctx
, const u8
*addr
, const u8
*data
,
201 size_t data_len
, int encrypt
)
203 struct ibss_rsn
*ibss_rsn
= ctx
;
204 struct wpa_supplicant
*wpa_s
= ibss_rsn
->wpa_s
;
206 wpa_printf(MSG_DEBUG
, "AUTH: %s(addr=" MACSTR
" data_len=%lu "
208 __func__
, MAC2STR(addr
), (unsigned long) data_len
, encrypt
);
211 return l2_packet_send(wpa_s
->l2
, addr
, ETH_P_EAPOL
, data
,
214 return wpa_drv_send_eapol(wpa_s
, addr
, ETH_P_EAPOL
, data
, data_len
);
218 static int ibss_rsn_auth_init_group(struct ibss_rsn
*ibss_rsn
,
221 struct wpa_auth_config conf
;
222 struct wpa_auth_callbacks cb
;
224 wpa_printf(MSG_DEBUG
, "AUTH: Initializing group state machine");
226 os_memset(&conf
, 0, sizeof(conf
));
228 conf
.wpa_key_mgmt
= WPA_KEY_MGMT_PSK
;
229 conf
.wpa_pairwise
= WPA_CIPHER_CCMP
;
230 conf
.rsn_pairwise
= WPA_CIPHER_CCMP
;
231 conf
.wpa_group
= WPA_CIPHER_CCMP
;
232 conf
.eapol_version
= 2;
234 os_memset(&cb
, 0, sizeof(cb
));
236 cb
.logger
= auth_logger
;
237 cb
.send_eapol
= auth_send_eapol
;
238 cb
.get_psk
= auth_get_psk
;
240 ibss_rsn
->auth_group
= wpa_init(own_addr
, &conf
, &cb
);
241 if (ibss_rsn
->auth_group
== NULL
) {
242 wpa_printf(MSG_DEBUG
, "AUTH: wpa_init() failed");
250 static int ibss_rsn_auth_init(struct ibss_rsn
*ibss_rsn
,
251 struct ibss_rsn_peer
*peer
)
253 peer
->auth
= wpa_auth_sta_init(ibss_rsn
->auth_group
, peer
->addr
);
254 if (peer
->auth
== NULL
) {
255 wpa_printf(MSG_DEBUG
, "AUTH: wpa_auth_sta_init() failed");
259 /* TODO: get peer RSN IE with Probe Request */
260 if (wpa_validate_wpa_ie(ibss_rsn
->auth_group
, peer
->auth
,
261 (u8
*) "\x30\x12\x01\x00"
263 "\x01\x00\x00\x0f\xac\x04"
264 "\x01\x00\x00\x0f\xac\x02", 20, NULL
, 0) !=
266 wpa_printf(MSG_DEBUG
, "AUTH: wpa_validate_wpa_ie() failed");
270 wpa_auth_sm_event(peer
->auth
, WPA_ASSOC
);
272 wpa_auth_sta_associated(ibss_rsn
->auth_group
, peer
->auth
);
278 int ibss_rsn_start(struct ibss_rsn
*ibss_rsn
, const u8
*addr
)
280 struct ibss_rsn_peer
*peer
;
282 wpa_printf(MSG_DEBUG
, "RSN: Starting IBSS Authenticator and "
283 "Supplicant for peer " MACSTR
, MAC2STR(addr
));
285 peer
= os_zalloc(sizeof(*peer
));
289 peer
->ibss_rsn
= ibss_rsn
;
290 os_memcpy(peer
->addr
, addr
, ETH_ALEN
);
292 if (ibss_rsn_supp_init(peer
, ibss_rsn
->wpa_s
->own_addr
, ibss_rsn
->psk
)
298 if (ibss_rsn_auth_init(ibss_rsn
, peer
) < 0) {
303 peer
->next
= ibss_rsn
->peers
;
304 ibss_rsn
->peers
= peer
;
310 struct ibss_rsn
* ibss_rsn_init(struct wpa_supplicant
*wpa_s
)
312 struct ibss_rsn
*ibss_rsn
;
314 ibss_rsn
= os_zalloc(sizeof(*ibss_rsn
));
315 if (ibss_rsn
== NULL
)
317 ibss_rsn
->wpa_s
= wpa_s
;
319 if (ibss_rsn_auth_init_group(ibss_rsn
, wpa_s
->own_addr
) < 0) {
320 ibss_rsn_deinit(ibss_rsn
);
328 void ibss_rsn_deinit(struct ibss_rsn
*ibss_rsn
)
330 struct ibss_rsn_peer
*peer
, *prev
;
332 if (ibss_rsn
== NULL
)
335 peer
= ibss_rsn
->peers
;
342 wpa_deinit(ibss_rsn
->auth_group
);
348 static int ibss_rsn_eapol_dst_supp(const u8
*buf
, size_t len
)
350 const struct ieee802_1x_hdr
*hdr
;
351 const struct wpa_eapol_key
*key
;
355 /* TODO: Support other EAPOL packets than just EAPOL-Key */
357 if (len
< sizeof(*hdr
) + sizeof(*key
))
360 hdr
= (const struct ieee802_1x_hdr
*) buf
;
361 key
= (const struct wpa_eapol_key
*) (hdr
+ 1);
362 plen
= be_to_host16(hdr
->length
);
364 if (hdr
->version
< EAPOL_VERSION
) {
365 /* TODO: backwards compatibility */
367 if (hdr
->type
!= IEEE802_1X_TYPE_EAPOL_KEY
) {
368 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame (type %u) discarded, "
369 "not a Key frame", hdr
->type
);
372 if (plen
> len
- sizeof(*hdr
) || plen
< sizeof(*key
)) {
373 wpa_printf(MSG_DEBUG
, "RSN: EAPOL frame payload size %lu "
374 "invalid (frame size %lu)",
375 (unsigned long) plen
, (unsigned long) len
);
379 if (key
->type
!= EAPOL_KEY_TYPE_RSN
) {
380 wpa_printf(MSG_DEBUG
, "RSN: EAPOL-Key type (%d) unknown, "
381 "discarded", key
->type
);
385 key_info
= WPA_GET_BE16(key
->key_info
);
387 return !!(key_info
& WPA_KEY_INFO_ACK
);
391 static int ibss_rsn_process_rx_eapol(struct ibss_rsn
*ibss_rsn
,
392 struct ibss_rsn_peer
*peer
,
393 const u8
*buf
, size_t len
)
398 supp
= ibss_rsn_eapol_dst_supp(buf
, len
);
402 tmp
= os_malloc(len
);
405 os_memcpy(tmp
, buf
, len
);
407 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Supplicant");
408 wpa_sm_rx_eapol(peer
->supp
, peer
->addr
, tmp
, len
);
410 wpa_printf(MSG_DEBUG
, "RSN: IBSS RX EAPOL for Authenticator");
411 wpa_receive(ibss_rsn
->auth_group
, peer
->auth
, tmp
, len
);
419 int ibss_rsn_rx_eapol(struct ibss_rsn
*ibss_rsn
, const u8
*src_addr
,
420 const u8
*buf
, size_t len
)
422 struct ibss_rsn_peer
*peer
;
424 for (peer
= ibss_rsn
->peers
; peer
; peer
= peer
->next
) {
425 if (os_memcmp(src_addr
, peer
->addr
, ETH_ALEN
) == 0)
426 return ibss_rsn_process_rx_eapol(ibss_rsn
, peer
,
430 if (ibss_rsn_eapol_dst_supp(buf
, len
) > 0) {
432 * Create new IBSS peer based on an EAPOL message from the peer
435 if (ibss_rsn_start(ibss_rsn
, src_addr
) < 0)
437 return ibss_rsn_process_rx_eapol(ibss_rsn
, ibss_rsn
->peers
,