[thirdparty/hostap.git] / wpa_supplicant / ibss_rsn.c

/*
 * wpa_supplicant - IBSS RSN
 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"

#include "common.h"
#include "l2_packet/l2_packet.h"
#include "wpa_supplicant_i.h"
#include "wpa.h"
#include "wpa_ie.h"
#include "../hostapd/wpa.h"
#include "ibss_rsn.h"


static void ibss_rsn_free(struct ibss_rsn_peer *peer)
{
	wpa_auth_sta_deinit(peer->auth);
	wpa_sm_deinit(peer->supp);
	os_free(peer);
}


static void supp_set_state(void *ctx, wpa_states state)
{
	struct ibss_rsn_peer *peer = ctx;
	peer->supp_state = state;
}


static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
			   size_t len)
{
	struct ibss_rsn_peer *peer = ctx;
	struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;

	wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
		   "len=%lu)",
		   __func__, MAC2STR(dest), proto, (unsigned long) len);

	if (wpa_s->l2)
		return l2_packet_send(wpa_s->l2, dest, proto, buf, len);

	return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
}


static u8 * supp_alloc_eapol(void *ctx, u8 type, const void *data,
			     u16 data_len, size_t *msg_len, void **data_pos)
{
	struct ieee802_1x_hdr *hdr;

	wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
		   __func__, type, data_len);

	*msg_len = sizeof(*hdr) + data_len;
	hdr = os_malloc(*msg_len);
	if (hdr == NULL)
		return NULL;

	hdr->version = 2;
	hdr->type = type;
	hdr->length = host_to_be16(data_len);

	if (data)
		os_memcpy(hdr + 1, data, data_len);
	else
		os_memset(hdr + 1, 0, data_len);

	if (data_pos)
		*data_pos = hdr + 1;

	return (u8 *) hdr;
}


static int supp_get_beacon_ie(void *ctx)
{
	struct ibss_rsn_peer *peer = ctx;

	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
	/* TODO: get correct RSN IE */
	return wpa_sm_set_ap_rsn_ie(peer->supp,
				    (u8 *) "\x30\x14\x01\x00"
				    "\x00\x0f\xac\x04"
				    "\x01\x00\x00\x0f\xac\x04"
				    "\x01\x00\x00\x0f\xac\x02"
				    "\x00\x00", 22);
}


static int supp_set_key(void *ctx, wpa_alg alg,
			const u8 *addr, int key_idx, int set_tx,
			const u8 *seq, size_t seq_len,
			const u8 *key, size_t key_len)
{
	wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
		   "set_tx=%d)",
		   __func__, alg, MAC2STR(addr), key_idx, set_tx);
	wpa_hexdump(MSG_DEBUG, "SUPP: set_key - seq", seq, seq_len);
	wpa_hexdump(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
	return 0;
}


static void * supp_get_network_ctx(void *ctx)
{
	struct ibss_rsn_peer *peer = ctx;
	return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
}


static int supp_mlme_setprotection(void *ctx, const u8 *addr,
				   int protection_type, int key_type)
{
	wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
		   "key_type=%d)",
		   __func__, MAC2STR(addr), protection_type, key_type);
	return 0;
}


static void supp_cancel_auth_timeout(void *ctx)
{
	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
}


int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
		       const u8 *psk)
{
	struct wpa_sm_ctx *ctx = os_zalloc(sizeof(*ctx));
	if (ctx == NULL)
		return -1;

	ctx->ctx = peer;
	ctx->set_state = supp_set_state;
	ctx->ether_send = supp_ether_send;
	ctx->get_beacon_ie = supp_get_beacon_ie;
	ctx->alloc_eapol = supp_alloc_eapol;
	ctx->set_key = supp_set_key;
	ctx->get_network_ctx = supp_get_network_ctx;
	ctx->mlme_setprotection = supp_mlme_setprotection;
	ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
	peer->supp = wpa_sm_init(ctx);
	if (peer->supp == NULL) {
		wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
		return -1;
	}

	wpa_sm_set_own_addr(peer->supp, own_addr);
	wpa_sm_set_param(peer->supp, WPA_PARAM_RSN_ENABLED, 1);
	wpa_sm_set_param(peer->supp, WPA_PARAM_PROTO, WPA_PROTO_RSN);
	wpa_sm_set_param(peer->supp, WPA_PARAM_PAIRWISE, WPA_CIPHER_CCMP);
	wpa_sm_set_param(peer->supp, WPA_PARAM_GROUP, WPA_CIPHER_CCMP);
	wpa_sm_set_param(peer->supp, WPA_PARAM_KEY_MGMT, WPA_KEY_MGMT_PSK);
	wpa_sm_set_pmk(peer->supp, psk, PMK_LEN);

	peer->supp_ie_len = sizeof(peer->supp_ie);
	if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
					    &peer->supp_ie_len) < 0) {
		wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_set_assoc_wpa_ie_default()"
			   " failed");
		return -1;
	}

	wpa_sm_notify_assoc(peer->supp, peer->addr);

	return 0;
}


static void auth_logger(void *ctx, const u8 *addr, logger_level level,
			const char *txt)
{
	if (addr)
		wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
			   MAC2STR(addr), txt);
	else
		wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
}


static const u8 * auth_get_psk(void *ctx, const u8 *addr, const u8 *prev_psk)
{
	struct ibss_rsn *ibss_rsn = ctx;
	wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
		   __func__, MAC2STR(addr), prev_psk);
	if (prev_psk)
		return NULL;
	return ibss_rsn->psk;
}


static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
			   size_t data_len, int encrypt)
{
	struct ibss_rsn *ibss_rsn = ctx;
	struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;

	wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
		   "encrypt=%d)",
		   __func__, MAC2STR(addr), (unsigned long) data_len, encrypt);

	if (wpa_s->l2)
		return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
				      data_len);

	return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
}


static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
				    const u8 *own_addr)
{
	struct wpa_auth_config conf;
	struct wpa_auth_callbacks cb;

	wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");

	os_memset(&conf, 0, sizeof(conf));
	conf.wpa = 2;
	conf.wpa_key_mgmt = WPA_KEY_MGMT_PSK;
	conf.wpa_pairwise = WPA_CIPHER_CCMP;
	conf.rsn_pairwise = WPA_CIPHER_CCMP;
	conf.wpa_group = WPA_CIPHER_CCMP;
	conf.eapol_version = 2;

	os_memset(&cb, 0, sizeof(cb));
	cb.ctx = ibss_rsn;
	cb.logger = auth_logger;
	cb.send_eapol = auth_send_eapol;
	cb.get_psk = auth_get_psk;

	ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
	if (ibss_rsn->auth_group == NULL) {
		wpa_printf(MSG_DEBUG, "AUTH: wpa_init() failed");
		return -1;
	}

	return 0;
}


static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
			      struct ibss_rsn_peer *peer)
{
	peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr);
	if (peer->auth == NULL) {
		wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
		return -1;
	}

	/* TODO: get peer RSN IE with Probe Request */
	if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
				(u8 *) "\x30\x14\x01\x00"
				"\x00\x0f\xac\x04"
				"\x01\x00\x00\x0f\xac\x04"
				"\x01\x00\x00\x0f\xac\x02"
				"\x00\x00", 22, NULL, 0) !=
	    WPA_IE_OK) {
		wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
		return -1;
	}

	wpa_auth_sm_event(peer->auth, WPA_ASSOC);

	wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth);

	return 0;
}


int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
{
	struct ibss_rsn_peer *peer;

	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
		   "Supplicant for peer " MACSTR, MAC2STR(addr));

	peer = os_zalloc(sizeof(*peer));
	if (peer == NULL)
		return -1;

	peer->ibss_rsn = ibss_rsn;
	os_memcpy(peer->addr, addr, ETH_ALEN);

	if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
	    < 0) {
		ibss_rsn_free(peer);
		return -1;
	}

	if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
		ibss_rsn_free(peer);
		return -1;
	}

	peer->next = ibss_rsn->peers;
	ibss_rsn->peers = peer;

	return 0;
}


struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
{
	struct ibss_rsn *ibss_rsn;

	ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
	if (ibss_rsn == NULL)
		return NULL;
	ibss_rsn->wpa_s = wpa_s;

	if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
		ibss_rsn_deinit(ibss_rsn);
		return NULL;
	}

	return ibss_rsn;
}


void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
{
	struct ibss_rsn_peer *peer, *prev;

	if (ibss_rsn == NULL)
		return;

	peer = ibss_rsn->peers;
	while (peer) {
		prev = peer;
		peer = peer->next;
		ibss_rsn_free(prev);
	}

	wpa_deinit(ibss_rsn->auth_group);
	os_free(ibss_rsn);

}


static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
{
	const struct ieee802_1x_hdr *hdr;
	const struct wpa_eapol_key *key;
	u16 key_info;
	size_t plen;

	/* TODO: Support other EAPOL packets than just EAPOL-Key */

	if (len < sizeof(*hdr) + sizeof(*key))
		return -1;

	hdr = (const struct ieee802_1x_hdr *) buf;
	key = (const struct wpa_eapol_key *) (hdr + 1);
	plen = be_to_host16(hdr->length);

	if (hdr->version < EAPOL_VERSION) {
		/* TODO: backwards compatibility */
	}
	if (hdr->type != IEEE802_1X_TYPE_EAPOL_KEY) {
		wpa_printf(MSG_DEBUG, "RSN: EAPOL frame (type %u) discarded, "
			"not a Key frame", hdr->type);
		return -1;
	}
	if (plen > len - sizeof(*hdr) || plen < sizeof(*key)) {
		wpa_printf(MSG_DEBUG, "RSN: EAPOL frame payload size %lu "
			   "invalid (frame size %lu)",
			   (unsigned long) plen, (unsigned long) len);
		return -1;
	}

	if (key->type != EAPOL_KEY_TYPE_RSN) {
		wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
			   "discarded", key->type);
		return -1;
	}

	key_info = WPA_GET_BE16(key->key_info);

	return !!(key_info & WPA_KEY_INFO_ACK);
}


static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
				     struct ibss_rsn_peer *peer,
				     const u8 *buf, size_t len)
{
	int supp;
	u8 *tmp;

	supp = ibss_rsn_eapol_dst_supp(buf, len);
	if (supp < 0)
		return -1;

	tmp = os_malloc(len);
	if (tmp == NULL)
		return -1;
	os_memcpy(tmp, buf, len);
	if (supp) {
		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
		wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
	} else {
		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
		wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
	}
	os_free(tmp);

	return 1;
}


int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
		      const u8 *buf, size_t len)
{
	struct ibss_rsn_peer *peer;

	for (peer = ibss_rsn->peers; peer; peer = peer->next) {
		if (os_memcmp(src_addr, peer->addr, ETH_ALEN) == 0)
			return ibss_rsn_process_rx_eapol(ibss_rsn, peer,
							 buf, len);
	}

	if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
		/*
		 * Create new IBSS peer based on an EAPOL message from the peer
		 * Authenticator.
		 */
		if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
			return -1;
		return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
						 buf, len);
	}

	return 0;
}
Commit	Line	Data
11ef8d35 JM	1	/*
	2	* wpa_supplicant - IBSS RSN
	3	* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
	4	*
	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.
	8	*
	9	* Alternatively, this software may be distributed under the terms of BSD
	10	* license.
	11	*
	12	* See README and COPYING for more details.
	13	*/
	14
	15	#include "includes.h"
	16
	17	#include "common.h"
e2d492dd	18	#include "l2_packet/l2_packet.h"
11ef8d35 JM	19	#include "wpa_supplicant_i.h"
	20	#include "wpa.h"
	21	#include "wpa_ie.h"
	22	#include "../hostapd/wpa.h"
	23	#include "ibss_rsn.h"
	24
	25
	26	static void ibss_rsn_free(struct ibss_rsn_peer *peer)
	27	{
	28	wpa_auth_sta_deinit(peer->auth);
	29	wpa_sm_deinit(peer->supp);
	30	os_free(peer);
	31	}
	32
	33
3146b2b9 JM	34	static void supp_set_state(void *ctx, wpa_states state)
	35	{
	36	struct ibss_rsn_peer *peer = ctx;
	37	peer->supp_state = state;
	38	}
	39
	40
11ef8d35 JM	41	static int supp_ether_send(void ctx, const u8 dest, u16 proto, const u8 *buf,
	42	size_t len)
	43	{
e2d492dd JM	44	struct ibss_rsn_peer *peer = ctx;
e2d492dd JM	45	struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
11ef8d35 JM	46
	47	wpa_printf(MSG_DEBUG, "SUPP: %s(dest=" MACSTR " proto=0x%04x "
	48	"len=%lu)",
	49	__func__, MAC2STR(dest), proto, (unsigned long) len);
	50
e2d492dd JM	51	if (wpa_s->l2)
e2d492dd JM	52	return l2_packet_send(wpa_s->l2, dest, proto, buf, len);
11ef8d35	53
e2d492dd	54	return wpa_drv_send_eapol(wpa_s, dest, proto, buf, len);
11ef8d35 JM	55	}
	56
	57
	58	static u8 * supp_alloc_eapol(void ctx, u8 type, const void data,
	59	u16 data_len, size_t msg_len, void *data_pos)
	60	{
	61	struct ieee802_1x_hdr *hdr;
	62
	63	wpa_printf(MSG_DEBUG, "SUPP: %s(type=%d data_len=%d)",
	64	__func__, type, data_len);
	65
	66	msg_len = sizeof(hdr) + data_len;
	67	hdr = os_malloc(*msg_len);
	68	if (hdr == NULL)
	69	return NULL;
	70
	71	hdr->version = 2;
	72	hdr->type = type;
	73	hdr->length = host_to_be16(data_len);
	74
	75	if (data)
	76	os_memcpy(hdr + 1, data, data_len);
	77	else
	78	os_memset(hdr + 1, 0, data_len);
	79
	80	if (data_pos)
	81	*data_pos = hdr + 1;
	82
	83	return (u8 *) hdr;
	84	}
	85
	86
	87	static int supp_get_beacon_ie(void *ctx)
	88	{
4691fc7b JM	89	struct ibss_rsn_peer *peer = ctx;
4691fc7b JM	90
11ef8d35	91	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
4691fc7b JM	92	/* TODO: get correct RSN IE */
	93	return wpa_sm_set_ap_rsn_ie(peer->supp,
	94	(u8 *) "\x30\x14\x01\x00"
	95	"\x00\x0f\xac\x04"
	96	"\x01\x00\x00\x0f\xac\x04"
	97	"\x01\x00\x00\x0f\xac\x02"
	98	"\x00\x00", 22);
11ef8d35 JM	99	}
	100
	101
	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)
	106	{
	107	wpa_printf(MSG_DEBUG, "SUPP: %s(alg=%d addr=" MACSTR " key_idx=%d "
	108	"set_tx=%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);
	112	return 0;
	113	}
	114
	115
3146b2b9 JM	116	static void * supp_get_network_ctx(void *ctx)
	117	{
	118	struct ibss_rsn_peer *peer = ctx;
	119	return wpa_supplicant_get_ssid(peer->ibss_rsn->wpa_s);
	120	}
	121
	122
11ef8d35 JM	123	static int supp_mlme_setprotection(void ctx, const u8 addr,
	124	int protection_type, int key_type)
	125	{
	126	wpa_printf(MSG_DEBUG, "SUPP: %s(addr=" MACSTR " protection_type=%d "
	127	"key_type=%d)",
	128	__func__, MAC2STR(addr), protection_type, key_type);
	129	return 0;
	130	}
	131
	132
	133	static void supp_cancel_auth_timeout(void *ctx)
	134	{
	135	wpa_printf(MSG_DEBUG, "SUPP: %s", __func__);
	136	}
	137
	138
	139	int ibss_rsn_supp_init(struct ibss_rsn_peer peer, const u8 own_addr,
	140	const u8 *psk)
	141	{
	142	struct wpa_sm_ctx ctx = os_zalloc(sizeof(ctx));
	143	if (ctx == NULL)
	144	return -1;
	145
	146	ctx->ctx = peer;
3146b2b9	147	ctx->set_state = supp_set_state;
11ef8d35 JM	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;
3146b2b9	152	ctx->get_network_ctx = supp_get_network_ctx;
11ef8d35 JM	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");
	158	return -1;
	159	}
	160
	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);
	168
11ef8d35 JM	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()"
	173	" failed");
	174	return -1;
	175	}
11ef8d35 JM	176
	177	wpa_sm_notify_assoc(peer->supp, peer->addr);
	178
	179	return 0;
	180	}
	181
	182
	183	static void auth_logger(void ctx, const u8 addr, logger_level level,
	184	const char *txt)
	185	{
	186	if (addr)
	187	wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " - %s",
	188	MAC2STR(addr), txt);
	189	else
	190	wpa_printf(MSG_DEBUG, "AUTH: %s", txt);
	191	}
	192
	193
	194	static const u8 * auth_get_psk(void ctx, const u8 addr, const u8 *prev_psk)
	195	{
	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);
	199	if (prev_psk)
	200	return NULL;
	201	return ibss_rsn->psk;
	202	}
	203
	204
	205	static int auth_send_eapol(void ctx, const u8 addr, const u8 *data,
	206	size_t data_len, int encrypt)
	207	{
da3c6a5e JM	208	struct ibss_rsn *ibss_rsn = ctx;
da3c6a5e JM	209	struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
11ef8d35 JM	210
	211	wpa_printf(MSG_DEBUG, "AUTH: %s(addr=" MACSTR " data_len=%lu "
	212	"encrypt=%d)",
	213	__func__, MAC2STR(addr), (unsigned long) data_len, encrypt);
	214
e2d492dd JM	215	if (wpa_s->l2)
	216	return l2_packet_send(wpa_s->l2, addr, ETH_P_EAPOL, data,
	217	data_len);
11ef8d35	218
e2d492dd	219	return wpa_drv_send_eapol(wpa_s, addr, ETH_P_EAPOL, data, data_len);
11ef8d35 JM	220	}
	221
	222
	223	static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
	224	const u8 *own_addr)
	225	{
	226	struct wpa_auth_config conf;
	227	struct wpa_auth_callbacks cb;
	228
	229	wpa_printf(MSG_DEBUG, "AUTH: Initializing group state machine");
	230
	231	os_memset(&conf, 0, sizeof(conf));
	232	conf.wpa = 2;
	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;
	238
	239	os_memset(&cb, 0, sizeof(cb));
	240	cb.ctx = ibss_rsn;
	241	cb.logger = auth_logger;
	242	cb.send_eapol = auth_send_eapol;
	243	cb.get_psk = auth_get_psk;
	244
	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");
	248	return -1;
	249	}
	250
	251	return 0;
	252	}
	253
	254
	255	static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
	256	struct ibss_rsn_peer *peer)
	257	{
	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");
	261	return -1;
	262	}
	263
d0fc6e12 JM	264	/* TODO: get peer RSN IE with Probe Request */
d0fc6e12 JM	265	if (wpa_validate_wpa_ie(ibss_rsn->auth_group, peer->auth,
4691fc7b	266	(u8 *) "\x30\x14\x01\x00"
d0fc6e12 JM	267	"\x00\x0f\xac\x04"
d0fc6e12 JM	268	"\x01\x00\x00\x0f\xac\x04"
4691fc7b JM	269	"\x01\x00\x00\x0f\xac\x02"
4691fc7b JM	270	"\x00\x00", 22, NULL, 0) !=
d0fc6e12	271	WPA_IE_OK) {
11ef8d35 JM	272	wpa_printf(MSG_DEBUG, "AUTH: wpa_validate_wpa_ie() failed");
	273	return -1;
	274	}
11ef8d35 JM	275
	276	wpa_auth_sm_event(peer->auth, WPA_ASSOC);
	277
	278	wpa_auth_sta_associated(ibss_rsn->auth_group, peer->auth);
	279
	280	return 0;
	281	}
	282
	283
	284	int ibss_rsn_start(struct ibss_rsn ibss_rsn, const u8 addr)
	285	{
	286	struct ibss_rsn_peer *peer;
	287
	288	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
	289	"Supplicant for peer " MACSTR, MAC2STR(addr));
	290
	291	peer = os_zalloc(sizeof(*peer));
	292	if (peer == NULL)
	293	return -1;
	294
e2d492dd	295	peer->ibss_rsn = ibss_rsn;
11ef8d35 JM	296	os_memcpy(peer->addr, addr, ETH_ALEN);
	297
	298	if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
	299	< 0) {
	300	ibss_rsn_free(peer);
	301	return -1;
	302	}
	303
	304	if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
	305	ibss_rsn_free(peer);
	306	return -1;
	307	}
	308
	309	peer->next = ibss_rsn->peers;
	310	ibss_rsn->peers = peer;
	311
	312	return 0;
	313	}
	314
	315
	316	struct ibss_rsn * ibss_rsn_init(struct wpa_supplicant *wpa_s)
	317	{
	318	struct ibss_rsn *ibss_rsn;
	319
	320	ibss_rsn = os_zalloc(sizeof(*ibss_rsn));
	321	if (ibss_rsn == NULL)
	322	return NULL;
	323	ibss_rsn->wpa_s = wpa_s;
	324
	325	if (ibss_rsn_auth_init_group(ibss_rsn, wpa_s->own_addr) < 0) {
	326	ibss_rsn_deinit(ibss_rsn);
	327	return NULL;
	328	}
	329
	330	return ibss_rsn;
	331	}
	332
	333
	334	void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
	335	{
	336	struct ibss_rsn_peer peer, prev;
	337
	338	if (ibss_rsn == NULL)
	339	return;
	340
	341	peer = ibss_rsn->peers;
	342	while (peer) {
	343	prev = peer;
	344	peer = peer->next;
	345	ibss_rsn_free(prev);
	346	}
	347
	348	wpa_deinit(ibss_rsn->auth_group);
	349	os_free(ibss_rsn);
	350
	351	}
8be18440 JM	352
	353
	354	static int ibss_rsn_eapol_dst_supp(const u8 *buf, size_t len)
	355	{
	356	const struct ieee802_1x_hdr *hdr;
	357	const struct wpa_eapol_key *key;
	358	u16 key_info;
	359	size_t plen;
	360
	361	/* TODO: Support other EAPOL packets than just EAPOL-Key */
	362
	363	if (len < sizeof(hdr) + sizeof(key))
	364	return -1;
	365
	366	hdr = (const struct ieee802_1x_hdr *) buf;
	367	key = (const struct wpa_eapol_key *) (hdr + 1);
	368	plen = be_to_host16(hdr->length);
	369
	370	if (hdr->version < EAPOL_VERSION) {
	371	/* TODO: backwards compatibility */
	372	}
	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);
	376	return -1;
	377	}
	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);
	382	return -1;
	383	}
	384
	385	if (key->type != EAPOL_KEY_TYPE_RSN) {
	386	wpa_printf(MSG_DEBUG, "RSN: EAPOL-Key type (%d) unknown, "
	387	"discarded", key->type);
	388	return -1;
	389	}
	390
	391	key_info = WPA_GET_BE16(key->key_info);
	392
	393	return !!(key_info & WPA_KEY_INFO_ACK);
	394	}
	395
	396
	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)
	400	{
	401	int supp;
	402	u8 *tmp;
	403
	404	supp = ibss_rsn_eapol_dst_supp(buf, len);
	405	if (supp < 0)
	406	return -1;
	407
	408	tmp = os_malloc(len);
	409	if (tmp == NULL)
	410	return -1;
	411	os_memcpy(tmp, buf, len);
	412	if (supp) {
	413	wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
	414	wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
	415	} else {
416	wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
417	wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
418	}
419	os_free(tmp);
420
421	return 1;
422	}
423
424
425	int ibss_rsn_rx_eapol(struct ibss_rsn ibss_rsn, const u8 src_addr,
426	const u8 *buf, size_t len)
427	{
428	struct ibss_rsn_peer *peer;
429
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,
433	buf, len);
434	}
435
436	if (ibss_rsn_eapol_dst_supp(buf, len) > 0) {
437	/*
438	* Create new IBSS peer based on an EAPOL message from the peer
439	* Authenticator.
440	*/
441	if (ibss_rsn_start(ibss_rsn, src_addr) < 0)
442	return -1;
443	return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
444	buf, len);
445	}
446
447	return 0;
448	}