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->msg_ctx = peer->ibss_rsn->wpa_s;
148 ctx->set_state = supp_set_state;
149 ctx->ether_send = supp_ether_send;
150 ctx->get_beacon_ie = supp_get_beacon_ie;
151 ctx->alloc_eapol = supp_alloc_eapol;
152 ctx->set_key = supp_set_key;
153 ctx->get_network_ctx = supp_get_network_ctx;
154 ctx->mlme_setprotection = supp_mlme_setprotection;
155 ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
156 peer->supp = wpa_sm_init(ctx);
157 if (peer->supp == NULL) {
158 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
162 wpa_sm_set_own_addr(peer->supp, own_addr);
163 wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
164 wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
165 wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
166 wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
167 wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
168 wpa_sm_set_pmk(peer->supp, psk, PMK_LEN);
170 peer->supp_ie_len = sizeof(peer->supp_ie);
171 if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
172 &peer->supp_ie_len) < 0) {
173 wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
178 wpa_sm_notify_assoc(peer->supp, peer->addr);
184 static void auth_logger(void *ctx, const u8 *addr, logger_level level,
188 wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
191 wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
195 static const u8 * auth_get_psk(void *ctx, const u8 *addr, const u8 *prev_psk)
197 struct ibss_rsn *ibss_rsn = ctx;
198 wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
199 __func__, MAC2STR(addr), prev_psk);
202 return ibss_rsn->psk;
206 static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
207 size_t data_len, int encrypt)
209 struct ibss_rsn *ibss_rsn = ctx;
210 struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
212 wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
214 __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
217 return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
220 return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
224 static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
227 struct wpa_auth_config conf;
228 struct wpa_auth_callbacks cb;
230 wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
232 os_memset(&conf, 0, sizeof(conf));
234 conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
235 conf.wpa_pairwise = WPA_CIPHER_CCMP;
236 conf.rsn_pairwise = WPA_CIPHER_CCMP;
237 conf.wpa_group = WPA_CIPHER_CCMP;
238 conf.eapol_version = 2;
240 os_memset(&cb, 0, sizeof(cb));
242 cb.logger = auth_logger;
243 cb.send_eapol = auth_send_eapol;
244 cb.get_psk = auth_get_psk;
246 ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
247 if (ibss_rsn->auth_group == NULL) {
248 wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
256 static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
257 struct ibss_rsn_peer *peer)
259 peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr);
260 if (peer->auth == NULL) {
261 wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
265 /* TODO: get peer RSN IE with Probe Request */
266 if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
267 (u8 *) "\x30\x14\x01\x00"
269 "\x01\x00\x00\x0f\xac\x04"
270 "\x01\x00\x00\x0f\xac\x02"
271 "\x00\x00", 22, NULL, 0) !=
273 wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
277 wpa_auth_sm_event(peer->auth, WPA_ASSOC);
279 wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth);
285 int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
287 struct ibss_rsn_peer *peer;
289 wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
290 "Supplicant for peer " MACSTR, MAC2STR(addr));
292 peer = os_zalloc(sizeof(*peer));
296 peer->ibss_rsn = ibss_rsn;
297 os_memcpy(peer->addr, addr, ETH_ALEN);
299 if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
305 if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
310 peer->next = ibss_rsn->peers;
311 ibss_rsn->peers = peer;
317 struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
319 struct ibss_rsn *ibss_rsn;
321 ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
322 if (ibss_rsn == NULL)
324 ibss_rsn->wpa_s = wpa_s;
326 if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
327 ibss_rsn_deinit(ibss_rsn);
335 void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
337 struct ibss_rsn_peer *peer, *prev;
339 if (ibss_rsn == NULL)
342 peer = ibss_rsn->peers;
349 wpa_deinit(ibss_rsn->auth_group);
355 static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
357 const struct ieee802_1x_hdr *hdr;
358 const struct wpa_eapol_key *key;
362 /* TODO: Support other EAPOL packets than just EAPOL-Key */
364 if (len < sizeof(*hdr) + sizeof(*key))
367 hdr = (const struct ieee802_1x_hdr *) buf;
368 key = (const struct wpa_eapol_key *) (hdr + 1);
369 plen = be_to_host16(hdr->length);
371 if (hdr->version < EAPOL_VERSION) {
372 /* TODO: backwards compatibility */
374 if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
375 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
376 "not a Key frame", hdr->type);
379 if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
380 wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
381 "invalid (frame size %lu)",
382 (unsigned long) plen, (unsigned long) len);
386 if (key->type != EAPOL_KEY_TYPE_RSN) {
387 wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
388 "discarded", key->type);
392 key_info = WPA_GET_BE16(key->key_info);
394 return !!(key_info & WPA_KEY_INFO_ACK);
398 static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
399 struct ibss_rsn_peer *peer,
400 const u8 *buf, size_t len)
405 supp = ibss_rsn_eapol_dst_supp(buf, len);
409 tmp = os_malloc(len);
412 os_memcpy(tmp, buf, len);
414 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
415 wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
417 wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
418 wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
426 int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
427 const u8 *buf, size_t len)
429 struct ibss_rsn_peer *peer;
431 for (peer = ibss_rsn->peers; peer; peer = peer->next) {
432 if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
433 return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
437 if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
439 * Create new IBSS peer based on an EAPOL message from the peer
442 if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
444 return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
452 void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
454 os_memcpy(ibss_rsn->psk, psk, PMK_LEN);