X-Git-Url: http://www.project-moonshot.org/gitweb/?p=mech_eap.git;a=blobdiff_plain;f=libeap%2Fwpa_supplicant%2Fibss_rsn.c;h=d9d0ae7f10dd63c25a04175d32d3682bac5c3410;hp=0e332534e491efe5b3f5920562c32c71492414e8;hb=4f319dde67a76fe0aaf33f6d2788968012584ada;hpb=ed09b5e64dd485851310307979d5eed14678087b

diff --git a/libeap/wpa_supplicant/ibss_rsn.c b/libeap/wpa_supplicant/ibss_rsn.c
index 0e33253..d9d0ae7 100644
--- a/libeap/wpa_supplicant/ibss_rsn.c
+++ b/libeap/wpa_supplicant/ibss_rsn.c
@@ -1,31 +1,44 @@
 /*
  * wpa_supplicant - IBSS RSN
- * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2009-2013, 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.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
  */
 
 #include "includes.h"
 
 #include "common.h"
+#include "common/wpa_ctrl.h"
+#include "utils/eloop.h"
 #include "l2_packet/l2_packet.h"
 #include "rsn_supp/wpa.h"
 #include "rsn_supp/wpa_ie.h"
 #include "ap/wpa_auth.h"
 #include "wpa_supplicant_i.h"
 #include "driver_i.h"
+#include "common/ieee802_11_defs.h"
 #include "ibss_rsn.h"
 
 
+static void ibss_rsn_auth_timeout(void *eloop_ctx, void *timeout_ctx);
+
+
+static struct ibss_rsn_peer * ibss_rsn_get_peer(struct ibss_rsn *ibss_rsn,
+						const u8 *addr)
+{
+	struct ibss_rsn_peer *peer;
+
+	for (peer = ibss_rsn->peers; peer; peer = peer->next)
+		if (os_memcmp(addr, peer->addr, ETH_ALEN) == 0)
+			break;
+	return peer;
+}
+
+
 static void ibss_rsn_free(struct ibss_rsn_peer *peer)
 {
+	eloop_cancel_timeout(ibss_rsn_auth_timeout, peer, NULL);
 	wpa_auth_sta_deinit(peer->auth);
 	wpa_sm_deinit(peer->supp);
 	os_free(peer);
@@ -39,6 +52,13 @@ static void supp_set_state(void *ctx, enum wpa_states state)
 }
 
 
+static enum wpa_states supp_get_state(void *ctx)
+{
+	struct ibss_rsn_peer *peer = ctx;
+	return peer->supp_state;
+}
+
+
 static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
 			   size_t len)
 {
@@ -52,7 +72,7 @@ static int supp_ether_send(void *ctx, const u8 *dest, u16 proto, const u8 *buf,
 	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);
+	return -1;
 }
 
 
@@ -100,6 +120,22 @@ static int supp_get_beacon_ie(void *ctx)
 }
 
 
+static void ibss_check_rsn_completed(struct ibss_rsn_peer *peer)
+{
+	struct wpa_supplicant *wpa_s = peer->ibss_rsn->wpa_s;
+
+	if ((peer->authentication_status &
+	     (IBSS_RSN_SET_PTK_SUPP | IBSS_RSN_SET_PTK_AUTH)) !=
+	    (IBSS_RSN_SET_PTK_SUPP | IBSS_RSN_SET_PTK_AUTH))
+		return;
+	if (peer->authentication_status & IBSS_RSN_REPORTED_PTK)
+		return;
+	peer->authentication_status |= IBSS_RSN_REPORTED_PTK;
+	wpa_msg(wpa_s, MSG_INFO, IBSS_RSN_COMPLETED MACSTR,
+		MAC2STR(peer->addr));
+}
+
+
 static int supp_set_key(void *ctx, enum wpa_alg alg,
 			const u8 *addr, int key_idx, int set_tx,
 			const u8 *seq, size_t seq_len,
@@ -114,6 +150,8 @@ static int supp_set_key(void *ctx, enum wpa_alg alg,
 	wpa_hexdump_key(MSG_DEBUG, "SUPP: set_key - key", key, key_len);
 
 	if (key_idx == 0) {
+		peer->authentication_status |= IBSS_RSN_SET_PTK_SUPP;
+		ibss_check_rsn_completed(peer);
 		/*
 		 * In IBSS RSN, the pairwise key from the 4-way handshake
 		 * initiated by the peer with highest MAC address is used.
@@ -125,6 +163,8 @@ static int supp_set_key(void *ctx, enum wpa_alg alg,
 		}
 	}
 
+	if (is_broadcast_ether_addr(addr))
+		addr = peer->addr;
 	return wpa_drv_set_key(peer->ibss_rsn->wpa_s, alg, addr, key_idx,
 			       set_tx, seq, seq_len, key, key_len);
 }
@@ -153,8 +193,14 @@ static void supp_cancel_auth_timeout(void *ctx)
 }
 
 
-int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
-		       const u8 *psk)
+static void supp_deauthenticate(void * ctx, int reason_code)
+{
+	wpa_printf(MSG_DEBUG, "SUPP: %s (TODO)", __func__);
+}
+
+
+static 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)
@@ -163,6 +209,7 @@ int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
 	ctx->ctx = peer;
 	ctx->msg_ctx = peer->ibss_rsn->wpa_s;
 	ctx->set_state = supp_set_state;
+	ctx->get_state = supp_get_state;
 	ctx->ether_send = supp_ether_send;
 	ctx->get_beacon_ie = supp_get_beacon_ie;
 	ctx->alloc_eapol = supp_alloc_eapol;
@@ -170,6 +217,7 @@ int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
 	ctx->get_network_ctx = supp_get_network_ctx;
 	ctx->mlme_setprotection = supp_mlme_setprotection;
 	ctx->cancel_auth_timeout = supp_cancel_auth_timeout;
+	ctx->deauthenticate = supp_deauthenticate;
 	peer->supp = wpa_sm_init(ctx);
 	if (peer->supp == NULL) {
 		wpa_printf(MSG_DEBUG, "SUPP: wpa_sm_init() failed");
@@ -182,7 +230,7 @@ int ibss_rsn_supp_init(struct ibss_rsn_peer *peer, const u8 *own_addr,
 	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);
+	wpa_sm_set_pmk(peer->supp, psk, PMK_LEN, NULL);
 
 	peer->supp_ie_len = sizeof(peer->supp_ie);
 	if (wpa_sm_set_assoc_wpa_ie_default(peer->supp, peer->supp_ie,
@@ -209,7 +257,8 @@ static void auth_logger(void *ctx, const u8 *addr, logger_level level,
 }
 
 
-static const u8 * auth_get_psk(void *ctx, const u8 *addr, const u8 *prev_psk)
+static const u8 * auth_get_psk(void *ctx, const u8 *addr,
+			       const u8 *p2p_dev_addr, const u8 *prev_psk)
 {
 	struct ibss_rsn *ibss_rsn = ctx;
 	wpa_printf(MSG_DEBUG, "AUTH: %s (addr=" MACSTR " prev_psk=%p)",
@@ -234,7 +283,7 @@ static int auth_send_eapol(void *ctx, const u8 *addr, const u8 *data,
 		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);
+	return -1;
 }
 
 
@@ -257,6 +306,15 @@ static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
 	wpa_hexdump_key(MSG_DEBUG, "AUTH: set_key - key", key, key_len);
 
 	if (idx == 0) {
+		if (addr) {
+			struct ibss_rsn_peer *peer;
+			peer = ibss_rsn_get_peer(ibss_rsn, addr);
+			if (peer) {
+				peer->authentication_status |=
+					IBSS_RSN_SET_PTK_AUTH;
+				ibss_check_rsn_completed(peer);
+			}
+		}
 		/*
 		 * In IBSS RSN, the pairwise key from the 4-way handshake
 		 * initiated by the peer with highest MAC address is used.
@@ -273,6 +331,78 @@ static int auth_set_key(void *ctx, int vlan_id, enum wpa_alg alg,
 }
 
 
+static void ibss_rsn_disconnect(void *ctx, const u8 *addr, u16 reason)
+{
+	struct ibss_rsn *ibss_rsn = ctx;
+	wpa_drv_sta_deauth(ibss_rsn->wpa_s, addr, reason);
+}
+
+
+static int auth_for_each_sta(void *ctx, int (*cb)(struct wpa_state_machine *sm,
+						  void *ctx),
+			     void *cb_ctx)
+{
+	struct ibss_rsn *ibss_rsn = ctx;
+	struct ibss_rsn_peer *peer;
+
+	wpa_printf(MSG_DEBUG, "AUTH: for_each_sta");
+
+	for (peer = ibss_rsn->peers; peer; peer = peer->next) {
+		if (peer->auth && cb(peer->auth, cb_ctx))
+			return 1;
+	}
+
+	return 0;
+}
+
+
+static void ibss_set_sta_authorized(struct ibss_rsn *ibss_rsn,
+				    struct ibss_rsn_peer *peer, int authorized)
+{
+	int res;
+
+	if (authorized) {
+		res = wpa_drv_sta_set_flags(ibss_rsn->wpa_s, peer->addr,
+					    WPA_STA_AUTHORIZED,
+					    WPA_STA_AUTHORIZED, ~0);
+		wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " authorizing port",
+			   MAC2STR(peer->addr));
+	} else {
+		res = wpa_drv_sta_set_flags(ibss_rsn->wpa_s, peer->addr,
+					    0, 0, ~WPA_STA_AUTHORIZED);
+		wpa_printf(MSG_DEBUG, "AUTH: " MACSTR " unauthorizing port",
+			   MAC2STR(peer->addr));
+	}
+
+	if (res && errno != ENOENT) {
+		wpa_printf(MSG_DEBUG, "Could not set station " MACSTR " flags "
+			   "for kernel driver (errno=%d)",
+			   MAC2STR(peer->addr), errno);
+	}
+}
+
+
+static void auth_set_eapol(void *ctx, const u8 *addr,
+				       wpa_eapol_variable var, int value)
+{
+	struct ibss_rsn *ibss_rsn = ctx;
+	struct ibss_rsn_peer *peer = ibss_rsn_get_peer(ibss_rsn, addr);
+
+	if (peer == NULL)
+		return;
+
+	switch (var) {
+	case WPA_EAPOL_authorized:
+		ibss_set_sta_authorized(ibss_rsn, peer, value);
+		break;
+	default:
+		/* do not handle any other event */
+		wpa_printf(MSG_DEBUG, "AUTH: eapol event not handled %d", var);
+		break;
+	}
+}
+
+
 static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
 				    const u8 *own_addr)
 {
@@ -288,13 +418,17 @@ static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
 	conf.rsn_pairwise = WPA_CIPHER_CCMP;
 	conf.wpa_group = WPA_CIPHER_CCMP;
 	conf.eapol_version = 2;
+	conf.wpa_group_rekey = 600;
 
 	os_memset(&cb, 0, sizeof(cb));
 	cb.ctx = ibss_rsn;
 	cb.logger = auth_logger;
+	cb.set_eapol = auth_set_eapol;
 	cb.send_eapol = auth_send_eapol;
 	cb.get_psk = auth_get_psk;
 	cb.set_key = auth_set_key;
+	cb.for_each_sta = auth_for_each_sta;
+	cb.disconnect = ibss_rsn_disconnect;
 
 	ibss_rsn->auth_group = wpa_init(own_addr, &conf, &cb);
 	if (ibss_rsn->auth_group == NULL) {
@@ -302,6 +436,8 @@ static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
 		return -1;
 	}
 
+	wpa_init_keys(ibss_rsn->auth_group);
+
 	return 0;
 }
 
@@ -309,7 +445,7 @@ static int ibss_rsn_auth_init_group(struct ibss_rsn *ibss_rsn,
 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);
+	peer->auth = wpa_auth_sta_init(ibss_rsn->auth_group, peer->addr, NULL);
 	if (peer->auth == NULL) {
 		wpa_printf(MSG_DEBUG, "AUTH: wpa_auth_sta_init() failed");
 		return -1;
@@ -337,35 +473,195 @@ static int ibss_rsn_auth_init(struct ibss_rsn *ibss_rsn,
 }
 
 
-int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
+static int ibss_rsn_send_auth(struct ibss_rsn *ibss_rsn, const u8 *da, int seq)
+{
+	struct ieee80211_mgmt auth;
+	const size_t auth_length = IEEE80211_HDRLEN + sizeof(auth.u.auth);
+	struct wpa_supplicant *wpa_s = ibss_rsn->wpa_s;
+
+	if (wpa_s->driver->send_frame == NULL)
+		return -1;
+
+	os_memset(&auth, 0, sizeof(auth));
+
+	auth.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+					  WLAN_FC_STYPE_AUTH);
+	os_memcpy(auth.da, da, ETH_ALEN);
+	os_memcpy(auth.sa, wpa_s->own_addr, ETH_ALEN);
+	os_memcpy(auth.bssid, wpa_s->bssid, ETH_ALEN);
+
+	auth.u.auth.auth_alg = host_to_le16(WLAN_AUTH_OPEN);
+	auth.u.auth.auth_transaction = host_to_le16(seq);
+	auth.u.auth.status_code = host_to_le16(WLAN_STATUS_SUCCESS);
+
+	wpa_printf(MSG_DEBUG, "RSN: IBSS TX Auth frame (SEQ %d) to " MACSTR,
+		   seq, MAC2STR(da));
+
+	return wpa_s->driver->send_frame(wpa_s->drv_priv, (u8 *) &auth,
+					 auth_length, 0);
+}
+
+
+static int ibss_rsn_is_auth_started(struct ibss_rsn_peer * peer)
+{
+	return peer->authentication_status &
+	       (IBSS_RSN_AUTH_BY_US | IBSS_RSN_AUTH_EAPOL_BY_US);
+}
+
+
+static struct ibss_rsn_peer *
+ibss_rsn_peer_init(struct ibss_rsn *ibss_rsn, const u8 *addr)
 {
 	struct ibss_rsn_peer *peer;
+	if (ibss_rsn == NULL)
+		return NULL;
+
+	peer = ibss_rsn_get_peer(ibss_rsn, addr);
+	if (peer) {
+		wpa_printf(MSG_DEBUG, "RSN: IBSS Supplicant for peer "MACSTR
+			   " already running", MAC2STR(addr));
+		return peer;
+	}
 
-	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator and "
-		   "Supplicant for peer " MACSTR, MAC2STR(addr));
+	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Supplicant for peer "MACSTR,
+		   MAC2STR(addr));
 
 	peer = os_zalloc(sizeof(*peer));
-	if (peer == NULL)
-		return -1;
+	if (peer == NULL) {
+		wpa_printf(MSG_DEBUG, "RSN: Could not allocate memory.");
+		return NULL;
+	}
 
 	peer->ibss_rsn = ibss_rsn;
 	os_memcpy(peer->addr, addr, ETH_ALEN);
+	peer->authentication_status = IBSS_RSN_AUTH_NOT_AUTHENTICATED;
 
-	if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr, ibss_rsn->psk)
-	    < 0) {
+	if (ibss_rsn_supp_init(peer, ibss_rsn->wpa_s->own_addr,
+			       ibss_rsn->psk) < 0) {
 		ibss_rsn_free(peer);
+		return NULL;
+	}
+
+	peer->next = ibss_rsn->peers;
+	ibss_rsn->peers = peer;
+
+	return peer;
+}
+
+
+static void ibss_rsn_auth_timeout(void *eloop_ctx, void *timeout_ctx)
+{
+	struct ibss_rsn_peer *peer = eloop_ctx;
+
+	/*
+	 * Assume peer does not support Authentication exchange or the frame was
+	 * lost somewhere - start EAPOL Authenticator.
+	 */
+	wpa_printf(MSG_DEBUG,
+		   "RSN: Timeout on waiting Authentication frame response from "
+		   MACSTR " - start authenticator", MAC2STR(peer->addr));
+
+	peer->authentication_status |= IBSS_RSN_AUTH_BY_US;
+	ibss_rsn_auth_init(peer->ibss_rsn, peer);
+}
+
+
+int ibss_rsn_start(struct ibss_rsn *ibss_rsn, const u8 *addr)
+{
+	struct ibss_rsn_peer *peer;
+	int res;
+
+	if (!ibss_rsn)
 		return -1;
+
+	/* if the peer already exists, exit immediately */
+	peer = ibss_rsn_get_peer(ibss_rsn, addr);
+	if (peer)
+		return 0;
+
+	peer = ibss_rsn_peer_init(ibss_rsn, addr);
+	if (peer == NULL)
+		return -1;
+
+	/* Open Authentication: send first Authentication frame */
+	res = ibss_rsn_send_auth(ibss_rsn, addr, 1);
+	if (res) {
+		/*
+		 * The driver may not support Authentication frame exchange in
+		 * IBSS. Ignore authentication and go through EAPOL exchange.
+		 */
+		peer->authentication_status |= IBSS_RSN_AUTH_BY_US;
+		return ibss_rsn_auth_init(ibss_rsn, peer);
+	} else {
+		os_get_reltime(&peer->own_auth_tx);
+		eloop_register_timeout(1, 0, ibss_rsn_auth_timeout, peer, NULL);
 	}
 
-	if (ibss_rsn_auth_init(ibss_rsn, peer) < 0) {
-		ibss_rsn_free(peer);
+	return 0;
+}
+
+
+static int ibss_rsn_peer_authenticated(struct ibss_rsn *ibss_rsn,
+				       struct ibss_rsn_peer *peer, int reason)
+{
+	int already_started;
+
+	if (ibss_rsn == NULL || peer == NULL)
 		return -1;
+
+	already_started = ibss_rsn_is_auth_started(peer);
+	peer->authentication_status |= reason;
+
+	if (already_started) {
+		wpa_printf(MSG_DEBUG, "RSN: IBSS Authenticator already "
+			   "started for peer " MACSTR, MAC2STR(peer->addr));
+		return 0;
 	}
 
-	peer->next = ibss_rsn->peers;
-	ibss_rsn->peers = peer;
+	wpa_printf(MSG_DEBUG, "RSN: Starting IBSS Authenticator "
+		   "for now-authenticated peer " MACSTR, MAC2STR(peer->addr));
 
-	return 0;
+	return ibss_rsn_auth_init(ibss_rsn, peer);
+}
+
+
+void ibss_rsn_stop(struct ibss_rsn *ibss_rsn, const u8 *peermac)
+{
+	struct ibss_rsn_peer *peer, *prev;
+
+	if (ibss_rsn == NULL)
+		return;
+
+	if (peermac == NULL) {
+		/* remove all peers */
+		wpa_printf(MSG_DEBUG, "%s: Remove all peers", __func__);
+		peer = ibss_rsn->peers;
+		while (peer) {
+			prev = peer;
+			peer = peer->next;
+			ibss_rsn_free(prev);
+			ibss_rsn->peers = peer;
+		}
+	} else {
+		/* remove specific peer */
+		wpa_printf(MSG_DEBUG, "%s: Remove specific peer " MACSTR,
+			   __func__, MAC2STR(peermac));
+
+		for (prev = NULL, peer = ibss_rsn->peers; peer != NULL;
+		     prev = peer, peer = peer->next) {
+			if (os_memcmp(peermac, peer->addr, ETH_ALEN) == 0) {
+				if (prev == NULL)
+					ibss_rsn->peers = peer->next;
+				else
+					prev->next = peer->next;
+				ibss_rsn_free(peer);
+				wpa_printf(MSG_DEBUG, "%s: Successfully "
+					   "removed a specific peer",
+					   __func__);
+				break;
+			}
+		}
+	}
 }
 
 
@@ -401,7 +697,8 @@ void ibss_rsn_deinit(struct ibss_rsn *ibss_rsn)
 		ibss_rsn_free(prev);
 	}
 
-	wpa_deinit(ibss_rsn->auth_group);
+	if (ibss_rsn->auth_group)
+		wpa_deinit(ibss_rsn->auth_group);
 	os_free(ibss_rsn);
 
 }
@@ -466,10 +763,21 @@ static int ibss_rsn_process_rx_eapol(struct ibss_rsn *ibss_rsn,
 		return -1;
 	os_memcpy(tmp, buf, len);
 	if (supp) {
-		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant");
+		peer->authentication_status |= IBSS_RSN_AUTH_EAPOL_BY_PEER;
+		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Supplicant from "
+			   MACSTR, MAC2STR(peer->addr));
 		wpa_sm_rx_eapol(peer->supp, peer->addr, tmp, len);
 	} else {
-		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator");
+		if (ibss_rsn_is_auth_started(peer) == 0) {
+			wpa_printf(MSG_DEBUG, "RSN: IBSS EAPOL for "
+				   "Authenticator dropped as " MACSTR " is not "
+				   "authenticated", MAC2STR(peer->addr));
+			os_free(tmp);
+			return -1;
+		}
+
+		wpa_printf(MSG_DEBUG, "RSN: IBSS RX EAPOL for Authenticator "
+			   "from "MACSTR, MAC2STR(peer->addr));
 		wpa_receive(ibss_rsn->auth_group, peer->auth, tmp, len);
 	}
 	os_free(tmp);
@@ -483,19 +791,28 @@ int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
 {
 	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 == NULL)
+		return -1;
+
+	peer = ibss_rsn_get_peer(ibss_rsn, src_addr);
+	if (peer)
+		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)
+		peer = ibss_rsn_peer_init(ibss_rsn, src_addr);
+		if (peer == NULL)
 			return -1;
+
+		/* assume the peer is authenticated already */
+		wpa_printf(MSG_DEBUG, "RSN: IBSS Not using IBSS Auth for peer "
+			   MACSTR, MAC2STR(src_addr));
+		ibss_rsn_peer_authenticated(ibss_rsn, peer,
+					    IBSS_RSN_AUTH_EAPOL_BY_US);
+
 		return ibss_rsn_process_rx_eapol(ibss_rsn, ibss_rsn->peers,
 						 buf, len);
 	}
@@ -503,8 +820,101 @@ int ibss_rsn_rx_eapol(struct ibss_rsn *ibss_rsn, const u8 *src_addr,
 	return 0;
 }
 
-
 void ibss_rsn_set_psk(struct ibss_rsn *ibss_rsn, const u8 *psk)
 {
+	if (ibss_rsn == NULL)
+		return;
 	os_memcpy(ibss_rsn->psk, psk, PMK_LEN);
 }
+
+
+static void ibss_rsn_handle_auth_1_of_2(struct ibss_rsn *ibss_rsn,
+					struct ibss_rsn_peer *peer,
+					const u8* addr)
+{
+	wpa_printf(MSG_DEBUG, "RSN: IBSS RX Auth frame (SEQ 1) from " MACSTR,
+		   MAC2STR(addr));
+
+	if (peer &&
+	    peer->authentication_status & IBSS_RSN_AUTH_EAPOL_BY_PEER) {
+		if (peer->own_auth_tx.sec) {
+			struct os_reltime now, diff;
+			os_get_reltime(&now);
+			os_reltime_sub(&now, &peer->own_auth_tx, &diff);
+			if (diff.sec == 0 && diff.usec < 500000) {
+				wpa_printf(MSG_DEBUG, "RSN: Skip IBSS reinit since only %u usec from own Auth frame TX",
+					   (int) diff.usec);
+				goto skip_reinit;
+			}
+		}
+		/*
+		 * A peer sent us an Authentication frame even though it already
+		 * started an EAPOL session. We should reinit state machines
+		 * here, but it's much more complicated than just deleting and
+		 * recreating the state machine
+		 */
+		wpa_printf(MSG_DEBUG, "RSN: IBSS Reinitializing station "
+			   MACSTR, MAC2STR(addr));
+
+		ibss_rsn_stop(ibss_rsn, addr);
+		peer = NULL;
+	}
+
+	if (!peer) {
+		peer = ibss_rsn_peer_init(ibss_rsn, addr);
+		if (!peer)
+			return;
+
+		wpa_printf(MSG_DEBUG, "RSN: IBSS Auth started by peer " MACSTR,
+			   MAC2STR(addr));
+	}
+
+skip_reinit:
+	/* reply with an Authentication frame now, before sending an EAPOL */
+	ibss_rsn_send_auth(ibss_rsn, addr, 2);
+	/* no need to start another AUTH challenge in the other way.. */
+	ibss_rsn_peer_authenticated(ibss_rsn, peer, IBSS_RSN_AUTH_EAPOL_BY_US);
+}
+
+
+void ibss_rsn_handle_auth(struct ibss_rsn *ibss_rsn, const u8 *auth_frame,
+			  size_t len)
+{
+	const struct ieee80211_mgmt *header;
+	struct ibss_rsn_peer *peer;
+	size_t auth_length;
+
+	header = (const struct ieee80211_mgmt *) auth_frame;
+	auth_length = IEEE80211_HDRLEN + sizeof(header->u.auth);
+
+	if (ibss_rsn == NULL || len < auth_length)
+		return;
+
+	if (le_to_host16(header->u.auth.auth_alg) != WLAN_AUTH_OPEN ||
+	    le_to_host16(header->u.auth.status_code) != WLAN_STATUS_SUCCESS)
+		return;
+
+	peer = ibss_rsn_get_peer(ibss_rsn, header->sa);
+
+	switch (le_to_host16(header->u.auth.auth_transaction)) {
+	case 1:
+		ibss_rsn_handle_auth_1_of_2(ibss_rsn, peer, header->sa);
+		break;
+	case 2:
+		wpa_printf(MSG_DEBUG, "RSN: IBSS RX Auth frame (SEQ 2) from "
+			   MACSTR, MAC2STR(header->sa));
+		if (!peer) {
+			wpa_printf(MSG_DEBUG, "RSN: Received Auth seq 2 from "
+				   "unknown STA " MACSTR, MAC2STR(header->sa));
+			break;
+		}
+
+		/* authentication has been completed */
+		eloop_cancel_timeout(ibss_rsn_auth_timeout, peer, NULL);
+		wpa_printf(MSG_DEBUG, "RSN: IBSS Auth completed with " MACSTR,
+			   MAC2STR(header->sa));
+		ibss_rsn_peer_authenticated(ibss_rsn, peer,
+					    IBSS_RSN_AUTH_BY_US);
+		break;
+	}
+}