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,