vendor/wpa/2.0

1 files changed, 2334 insertions, 0 deletions

diff --git a/src/rsn_supp/tdls.c b/src/rsn_supp/tdls.c
new file mode 100644
index 0000000000000..7646ca88671a3
--- /dev/null
+++ b/src/rsn_supp/tdls.c
@@ -0,0 +1,2334 @@
+/*
+ * wpa_supplicant - TDLS
+ * Copyright (c) 2010-2011, Atheros Communications
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "utils/eloop.h"
+#include "utils/os.h"
+#include "common/ieee802_11_defs.h"
+#include "crypto/sha256.h"
+#include "crypto/crypto.h"
+#include "crypto/aes_wrap.h"
+#include "rsn_supp/wpa.h"
+#include "rsn_supp/wpa_ie.h"
+#include "rsn_supp/wpa_i.h"
+#include "drivers/driver.h"
+#include "l2_packet/l2_packet.h"
+
+#ifdef CONFIG_TDLS_TESTING
+#define TDLS_TESTING_LONG_FRAME BIT(0)
+#define TDLS_TESTING_ALT_RSN_IE BIT(1)
+#define TDLS_TESTING_DIFF_BSSID BIT(2)
+#define TDLS_TESTING_SHORT_LIFETIME BIT(3)
+#define TDLS_TESTING_WRONG_LIFETIME_RESP BIT(4)
+#define TDLS_TESTING_WRONG_LIFETIME_CONF BIT(5)
+#define TDLS_TESTING_LONG_LIFETIME BIT(6)
+#define TDLS_TESTING_CONCURRENT_INIT BIT(7)
+#define TDLS_TESTING_NO_TPK_EXPIRATION BIT(8)
+#define TDLS_TESTING_DECLINE_RESP BIT(9)
+#define TDLS_TESTING_IGNORE_AP_PROHIBIT BIT(10)
+unsigned int tdls_testing = 0;
+#endif /* CONFIG_TDLS_TESTING */
+
+#define TPK_LIFETIME 43200 /* 12 hours */
+#define TPK_RETRY_COUNT 3
+#define TPK_TIMEOUT 5000 /* in milliseconds */
+
+#define TDLS_MIC_LEN		16
+
+#define TDLS_TIMEOUT_LEN	4
+
+struct wpa_tdls_ftie {
+	u8 ie_type; /* FTIE */
+	u8 ie_len;
+	u8 mic_ctrl[2];
+	u8 mic[TDLS_MIC_LEN];
+	u8 Anonce[WPA_NONCE_LEN]; /* Responder Nonce in TDLS */
+	u8 Snonce[WPA_NONCE_LEN]; /* Initiator Nonce in TDLS */
+	/* followed by optional elements */
+} STRUCT_PACKED;
+
+struct wpa_tdls_timeoutie {
+	u8 ie_type; /* Timeout IE */
+	u8 ie_len;
+	u8 interval_type;
+	u8 value[TDLS_TIMEOUT_LEN];
+} STRUCT_PACKED;
+
+struct wpa_tdls_lnkid {
+	u8 ie_type; /* Link Identifier IE */
+	u8 ie_len;
+	u8 bssid[ETH_ALEN];
+	u8 init_sta[ETH_ALEN];
+	u8 resp_sta[ETH_ALEN];
+} STRUCT_PACKED;
+
+/* TDLS frame headers as per IEEE Std 802.11z-2010 */
+struct wpa_tdls_frame {
+	u8 payloadtype; /* IEEE80211_TDLS_RFTYPE */
+	u8 category; /* Category */
+	u8 action; /* Action (enum tdls_frame_type) */
+} STRUCT_PACKED;
+
+static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs);
+static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx);
+static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer);
+
+
+#define TDLS_MAX_IE_LEN 80
+#define IEEE80211_MAX_SUPP_RATES 32
+
+struct wpa_tdls_peer {
+	struct wpa_tdls_peer *next;
+	int initiator; /* whether this end was initiator for TDLS setup */
+	u8 addr[ETH_ALEN]; /* other end MAC address */
+	u8 inonce[WPA_NONCE_LEN]; /* Initiator Nonce */
+	u8 rnonce[WPA_NONCE_LEN]; /* Responder Nonce */
+	u8 rsnie_i[TDLS_MAX_IE_LEN]; /* Initiator RSN IE */
+	size_t rsnie_i_len;
+	u8 rsnie_p[TDLS_MAX_IE_LEN]; /* Peer RSN IE */
+	size_t rsnie_p_len;
+	u32 lifetime;
+	int cipher; /* Selected cipher (WPA_CIPHER_*) */
+	u8 dtoken;
+
+	struct tpk {
+		u8 kck[16]; /* TPK-KCK */
+		u8 tk[16]; /* TPK-TK; assuming only CCMP will be used */
+	} tpk;
+	int tpk_set;
+	int tpk_success;
+
+	struct tpk_timer {
+		u8 dest[ETH_ALEN];
+		int count;      /* Retry Count */
+		int timer;      /* Timeout in milliseconds */
+		u8 action_code; /* TDLS frame type */
+		u8 dialog_token;
+		u16 status_code;
+		int buf_len;    /* length of TPK message for retransmission */
+		u8 *buf;        /* buffer for TPK message */
+	} sm_tmr;
+
+	u16 capability;
+
+	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
+	size_t supp_rates_len;
+};
+
+
+static int wpa_tdls_get_privacy(struct wpa_sm *sm)
+{
+	/*
+	 * Get info needed from supplicant to check if the current BSS supports
+	 * security. Other than OPEN mode, rest are considered secured
+	 * WEP/WPA/WPA2 hence TDLS frames are processed for TPK handshake.
+	 */
+	return sm->pairwise_cipher != WPA_CIPHER_NONE;
+}
+
+
+static u8 * wpa_add_ie(u8 *pos, const u8 *ie, size_t ie_len)
+{
+	os_memcpy(pos, ie, ie_len);
+	return pos + ie_len;
+}
+
+
+static int wpa_tdls_del_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+{
+	if (wpa_sm_set_key(sm, WPA_ALG_NONE, peer->addr,
+			   0, 0, NULL, 0, NULL, 0) < 0) {
+		wpa_printf(MSG_WARNING, "TDLS: Failed to delete TPK-TK from "
+			   "the driver");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int wpa_tdls_set_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+{
+	u8 key_len;
+	u8 rsc[6];
+	enum wpa_alg alg;
+
+	os_memset(rsc, 0, 6);
+
+	switch (peer->cipher) {
+	case WPA_CIPHER_CCMP:
+		alg = WPA_ALG_CCMP;
+		key_len = 16;
+		break;
+	case WPA_CIPHER_NONE:
+		wpa_printf(MSG_DEBUG, "TDLS: Pairwise Cipher Suite: "
+			   "NONE - do not use pairwise keys");
+		return -1;
+	default:
+		wpa_printf(MSG_WARNING, "TDLS: Unsupported pairwise cipher %d",
+			   sm->pairwise_cipher);
+		return -1;
+	}
+
+	if (wpa_sm_set_key(sm, alg, peer->addr, -1, 1,
+			   rsc, sizeof(rsc), peer->tpk.tk, key_len) < 0) {
+		wpa_printf(MSG_WARNING, "TDLS: Failed to set TPK to the "
+			   "driver");
+		return -1;
+	}
+	return 0;
+}
+
+
+static int wpa_tdls_send_tpk_msg(struct wpa_sm *sm, const u8 *dst,
+				 u8 action_code, u8 dialog_token,
+				 u16 status_code, const u8 *buf, size_t len)
+{
+	return wpa_sm_send_tdls_mgmt(sm, dst, action_code, dialog_token,
+				     status_code, buf, len);
+}
+
+
+static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
+			     u8 dialog_token, u16 status_code,
+			     const u8 *msg, size_t msg_len)
+{
+	struct wpa_tdls_peer *peer;
+
+	wpa_printf(MSG_DEBUG, "TDLS: TPK send dest=" MACSTR " action_code=%u "
+		   "dialog_token=%u status_code=%u msg_len=%u",
+		   MAC2STR(dest), action_code, dialog_token, status_code,
+		   (unsigned int) msg_len);
+
+	if (wpa_tdls_send_tpk_msg(sm, dest, action_code, dialog_token,
+				  status_code, msg, msg_len)) {
+		wpa_printf(MSG_INFO, "TDLS: Failed to send message "
+			   "(action_code=%u)", action_code);
+		return -1;
+	}
+
+	if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
+	    action_code == WLAN_TDLS_TEARDOWN ||
+	    action_code == WLAN_TDLS_DISCOVERY_REQUEST ||
+	    action_code == WLAN_TDLS_DISCOVERY_RESPONSE)
+		return 0; /* No retries */
+
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, dest, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
+			   "retry " MACSTR, MAC2STR(dest));
+		return 0;
+	}
+
+	eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
+
+	peer->sm_tmr.count = TPK_RETRY_COUNT;
+	peer->sm_tmr.timer = TPK_TIMEOUT;
+
+	/* Copy message to resend on timeout */
+	os_memcpy(peer->sm_tmr.dest, dest, ETH_ALEN);
+	peer->sm_tmr.action_code = action_code;
+	peer->sm_tmr.dialog_token = dialog_token;
+	peer->sm_tmr.status_code = status_code;
+	peer->sm_tmr.buf_len = msg_len;
+	os_free(peer->sm_tmr.buf);
+	peer->sm_tmr.buf = os_malloc(msg_len);
+	if (peer->sm_tmr.buf == NULL)
+		return -1;
+	os_memcpy(peer->sm_tmr.buf, msg, msg_len);
+
+	wpa_printf(MSG_DEBUG, "TDLS: Retry timeout registered "
+		   "(action_code=%u)", action_code);
+	eloop_register_timeout(peer->sm_tmr.timer / 1000, 0,
+			       wpa_tdls_tpk_retry_timeout, sm, peer);
+	return 0;
+}
+
+
+static int wpa_tdls_do_teardown(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
+				u16 reason_code, int free_peer)
+{
+	int ret;
+
+	if (sm->tdls_external_setup) {
+		ret = wpa_tdls_send_teardown(sm, peer->addr, reason_code);
+
+		/* disable the link after teardown was sent */
+		wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
+	} else {
+		ret = wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
+	}
+
+	if (sm->tdls_external_setup || free_peer)
+		wpa_tdls_peer_free(sm, peer);
+
+	return ret;
+}
+
+
+static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx)
+{
+
+	struct wpa_sm *sm = eloop_ctx;
+	struct wpa_tdls_peer *peer = timeout_ctx;
+
+	if (peer->sm_tmr.count) {
+		peer->sm_tmr.count--;
+		peer->sm_tmr.timer = TPK_TIMEOUT;
+
+		wpa_printf(MSG_INFO, "TDLS: Retrying sending of message "
+			   "(action_code=%u)",
+			   peer->sm_tmr.action_code);
+
+		if (peer->sm_tmr.buf == NULL) {
+			wpa_printf(MSG_INFO, "TDLS: No retry buffer available "
+				   "for action_code=%u",
+				   peer->sm_tmr.action_code);
+			eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm,
+					     peer);
+			return;
+		}
+
+		/* resend TPK Handshake Message to Peer */
+		if (wpa_tdls_send_tpk_msg(sm, peer->sm_tmr.dest,
+					  peer->sm_tmr.action_code,
+					  peer->sm_tmr.dialog_token,
+					  peer->sm_tmr.status_code,
+					  peer->sm_tmr.buf,
+					  peer->sm_tmr.buf_len)) {
+			wpa_printf(MSG_INFO, "TDLS: Failed to retry "
+				   "transmission");
+		}
+
+		eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
+		eloop_register_timeout(peer->sm_tmr.timer / 1000, 0,
+				       wpa_tdls_tpk_retry_timeout, sm, peer);
+	} else {
+		eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
+
+		wpa_printf(MSG_DEBUG, "TDLS: Sending Teardown Request");
+		wpa_tdls_do_teardown(sm, peer,
+				     WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, 1);
+	}
+}
+
+
+static void wpa_tdls_tpk_retry_timeout_cancel(struct wpa_sm *sm,
+					      struct wpa_tdls_peer *peer,
+					      u8 action_code)
+{
+	if (action_code == peer->sm_tmr.action_code) {
+		wpa_printf(MSG_DEBUG, "TDLS: Retry timeout cancelled for "
+			   "action_code=%u", action_code);
+
+		/* Cancel Timeout registered */
+		eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
+
+		/* free all resources meant for retry */
+		os_free(peer->sm_tmr.buf);
+		peer->sm_tmr.buf = NULL;
+
+		peer->sm_tmr.count = 0;
+		peer->sm_tmr.timer = 0;
+		peer->sm_tmr.buf_len = 0;
+		peer->sm_tmr.action_code = 0xff;
+	} else {
+		wpa_printf(MSG_INFO, "TDLS: Error in cancelling retry timeout "
+			   "(Unknown action_code=%u)", action_code);
+	}
+}
+
+
+static void wpa_tdls_generate_tpk(struct wpa_tdls_peer *peer,
+				  const u8 *own_addr, const u8 *bssid)
+{
+	u8 key_input[SHA256_MAC_LEN];
+	const u8 *nonce[2];
+	size_t len[2];
+	u8 data[3 * ETH_ALEN];
+
+	/* IEEE Std 802.11z-2010 8.5.9.1:
+	 * TPK-Key-Input = SHA-256(min(SNonce, ANonce) || max(SNonce, ANonce))
+	 */
+	len[0] = WPA_NONCE_LEN;
+	len[1] = WPA_NONCE_LEN;
+	if (os_memcmp(peer->inonce, peer->rnonce, WPA_NONCE_LEN) < 0) {
+		nonce[0] = peer->inonce;
+		nonce[1] = peer->rnonce;
+	} else {
+		nonce[0] = peer->rnonce;
+		nonce[1] = peer->inonce;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: min(Nonce)", nonce[0], WPA_NONCE_LEN);
+	wpa_hexdump(MSG_DEBUG, "TDLS: max(Nonce)", nonce[1], WPA_NONCE_LEN);
+	sha256_vector(2, nonce, len, key_input);
+	wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-Key-Input",
+			key_input, SHA256_MAC_LEN);
+
+	/*
+	 * TPK-Key-Data = KDF-N_KEY(TPK-Key-Input, "TDLS PMK",
+	 *	min(MAC_I, MAC_R) || max(MAC_I, MAC_R) || BSSID || N_KEY)
+	 * TODO: is N_KEY really included in KDF Context and if so, in which
+	 * presentation format (little endian 16-bit?) is it used? It gets
+	 * added by the KDF anyway..
+	 */
+
+	if (os_memcmp(own_addr, peer->addr, ETH_ALEN) < 0) {
+		os_memcpy(data, own_addr, ETH_ALEN);
+		os_memcpy(data + ETH_ALEN, peer->addr, ETH_ALEN);
+	} else {
+		os_memcpy(data, peer->addr, ETH_ALEN);
+		os_memcpy(data + ETH_ALEN, own_addr, ETH_ALEN);
+	}
+	os_memcpy(data + 2 * ETH_ALEN, bssid, ETH_ALEN);
+	wpa_hexdump(MSG_DEBUG, "TDLS: KDF Context", data, sizeof(data));
+
+	sha256_prf(key_input, SHA256_MAC_LEN, "TDLS PMK", data, sizeof(data),
+		   (u8 *) &peer->tpk, sizeof(peer->tpk));
+	wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-KCK",
+			peer->tpk.kck, sizeof(peer->tpk.kck));
+	wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-TK",
+			peer->tpk.tk, sizeof(peer->tpk.tk));
+	peer->tpk_set = 1;
+}
+
+
+/**
+ * wpa_tdls_ftie_mic - Calculate TDLS FTIE MIC
+ * @kck: TPK-KCK
+ * @lnkid: Pointer to the beginning of Link Identifier IE
+ * @rsnie: Pointer to the beginning of RSN IE used for handshake
+ * @timeoutie: Pointer to the beginning of Timeout IE used for handshake
+ * @ftie: Pointer to the beginning of FT IE
+ * @mic: Pointer for writing MIC
+ *
+ * Calculate MIC for TDLS frame.
+ */
+static int wpa_tdls_ftie_mic(const u8 *kck, u8 trans_seq, const u8 *lnkid,
+			     const u8 *rsnie, const u8 *timeoutie,
+			     const u8 *ftie, u8 *mic)
+{
+	u8 *buf, *pos;
+	struct wpa_tdls_ftie *_ftie;
+	const struct wpa_tdls_lnkid *_lnkid;
+	int ret;
+	int len = 2 * ETH_ALEN + 1 + 2 + lnkid[1] + 2 + rsnie[1] +
+		2 + timeoutie[1] + 2 + ftie[1];
+	buf = os_zalloc(len);
+	if (!buf) {
+		wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation");
+		return -1;
+	}
+
+	pos = buf;
+	_lnkid = (const struct wpa_tdls_lnkid *) lnkid;
+	/* 1) TDLS initiator STA MAC address */
+	os_memcpy(pos, _lnkid->init_sta, ETH_ALEN);
+	pos += ETH_ALEN;
+	/* 2) TDLS responder STA MAC address */
+	os_memcpy(pos, _lnkid->resp_sta, ETH_ALEN);
+	pos += ETH_ALEN;
+	/* 3) Transaction Sequence number */
+	*pos++ = trans_seq;
+	/* 4) Link Identifier IE */
+	os_memcpy(pos, lnkid, 2 + lnkid[1]);
+	pos += 2 + lnkid[1];
+	/* 5) RSN IE */
+	os_memcpy(pos, rsnie, 2 + rsnie[1]);
+	pos += 2 + rsnie[1];
+	/* 6) Timeout Interval IE */
+	os_memcpy(pos, timeoutie, 2 + timeoutie[1]);
+	pos += 2 + timeoutie[1];
+	/* 7) FTIE, with the MIC field of the FTIE set to 0 */
+	os_memcpy(pos, ftie, 2 + ftie[1]);
+	_ftie = (struct wpa_tdls_ftie *) pos;
+	os_memset(_ftie->mic, 0, TDLS_MIC_LEN);
+	pos += 2 + ftie[1];
+
+	wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf);
+	wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16);
+	ret = omac1_aes_128(kck, buf, pos - buf, mic);
+	os_free(buf);
+	wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16);
+	return ret;
+}
+
+
+/**
+ * wpa_tdls_key_mic_teardown - Calculate TDLS FTIE MIC for Teardown frame
+ * @kck: TPK-KCK
+ * @trans_seq: Transaction Sequence Number (4 - Teardown)
+ * @rcode: Reason code for Teardown
+ * @dtoken: Dialog Token used for that particular link
+ * @lnkid: Pointer to the beginning of Link Identifier IE
+ * @ftie: Pointer to the beginning of FT IE
+ * @mic: Pointer for writing MIC
+ *
+ * Calculate MIC for TDLS frame.
+ */
+static int wpa_tdls_key_mic_teardown(const u8 *kck, u8 trans_seq, u16 rcode,
+				     u8 dtoken, const u8 *lnkid,
+				     const u8 *ftie, u8 *mic)
+{
+	u8 *buf, *pos;
+	struct wpa_tdls_ftie *_ftie;
+	int ret;
+	int len;
+
+	if (lnkid == NULL)
+		return -1;
+
+	len = 2 + lnkid[1] + sizeof(rcode) + sizeof(dtoken) +
+		sizeof(trans_seq) + 2 + ftie[1];
+
+	buf = os_zalloc(len);
+	if (!buf) {
+		wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation");
+		return -1;
+	}
+
+	pos = buf;
+	/* 1) Link Identifier IE */
+	os_memcpy(pos, lnkid, 2 + lnkid[1]);
+	pos += 2 + lnkid[1];
+	/* 2) Reason Code */
+	WPA_PUT_LE16(pos, rcode);
+	pos += sizeof(rcode);
+	/* 3) Dialog token */
+	*pos++ = dtoken;
+	/* 4) Transaction Sequence number */
+	*pos++ = trans_seq;
+	/* 7) FTIE, with the MIC field of the FTIE set to 0 */
+	os_memcpy(pos, ftie, 2 + ftie[1]);
+	_ftie = (struct wpa_tdls_ftie *) pos;
+	os_memset(_ftie->mic, 0, TDLS_MIC_LEN);
+	pos += 2 + ftie[1];
+
+	wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf);
+	wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16);
+	ret = omac1_aes_128(kck, buf, pos - buf, mic);
+	os_free(buf);
+	wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16);
+	return ret;
+}
+
+
+static int wpa_supplicant_verify_tdls_mic(u8 trans_seq,
+					  struct wpa_tdls_peer *peer,
+					  const u8 *lnkid, const u8 *timeoutie,
+					  const struct wpa_tdls_ftie *ftie)
+{
+	u8 mic[16];
+
+	if (peer->tpk_set) {
+		wpa_tdls_ftie_mic(peer->tpk.kck, trans_seq, lnkid,
+				  peer->rsnie_p, timeoutie, (u8 *) ftie,
+				  mic);
+		if (os_memcmp(mic, ftie->mic, 16) != 0) {
+			wpa_printf(MSG_INFO, "TDLS: Invalid MIC in FTIE - "
+				   "dropping packet");
+			wpa_hexdump(MSG_DEBUG, "TDLS: Received MIC",
+				    ftie->mic, 16);
+			wpa_hexdump(MSG_DEBUG, "TDLS: Calculated MIC",
+				    mic, 16);
+			return -1;
+		}
+	} else {
+		wpa_printf(MSG_WARNING, "TDLS: Could not verify TDLS MIC, "
+			   "TPK not set - dropping packet");
+		return -1;
+	}
+	return 0;
+}
+
+
+static int wpa_supplicant_verify_tdls_mic_teardown(
+	u8 trans_seq, u16 rcode, u8 dtoken, struct wpa_tdls_peer *peer,
+	const u8 *lnkid, const struct wpa_tdls_ftie *ftie)
+{
+	u8 mic[16];
+
+	if (peer->tpk_set) {
+		wpa_tdls_key_mic_teardown(peer->tpk.kck, trans_seq, rcode,
+					  dtoken, lnkid, (u8 *) ftie, mic);
+		if (os_memcmp(mic, ftie->mic, 16) != 0) {
+			wpa_printf(MSG_INFO, "TDLS: Invalid MIC in Teardown - "
+				   "dropping packet");
+			return -1;
+		}
+	} else {
+		wpa_printf(MSG_INFO, "TDLS: Could not verify TDLS Teardown "
+			   "MIC, TPK not set - dropping packet");
+		return -1;
+	}
+	return 0;
+}
+
+
+static void wpa_tdls_tpk_timeout(void *eloop_ctx, void *timeout_ctx)
+{
+	struct wpa_sm *sm = eloop_ctx;
+	struct wpa_tdls_peer *peer = timeout_ctx;
+
+	/*
+	 * On TPK lifetime expiration, we have an option of either tearing down
+	 * the direct link or trying to re-initiate it. The selection of what
+	 * to do is not strictly speaking controlled by our role in the expired
+	 * link, but for now, use that to select whether to renew or tear down
+	 * the link.
+	 */
+
+	if (peer->initiator) {
+		wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
+			   " - try to renew", MAC2STR(peer->addr));
+		wpa_tdls_start(sm, peer->addr);
+	} else {
+		wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
+			   " - tear down", MAC2STR(peer->addr));
+		wpa_tdls_do_teardown(sm, peer,
+				     WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, 1);
+	}
+}
+
+
+static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+{
+	wpa_printf(MSG_DEBUG, "TDLS: Clear state for peer " MACSTR,
+		   MAC2STR(peer->addr));
+	eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
+	eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
+	peer->initiator = 0;
+	os_free(peer->sm_tmr.buf);
+	peer->sm_tmr.buf = NULL;
+	peer->rsnie_i_len = peer->rsnie_p_len = 0;
+	peer->cipher = 0;
+	peer->tpk_set = peer->tpk_success = 0;
+	os_memset(&peer->tpk, 0, sizeof(peer->tpk));
+	os_memset(peer->inonce, 0, WPA_NONCE_LEN);
+	os_memset(peer->rnonce, 0, WPA_NONCE_LEN);
+}
+
+
+static void wpa_tdls_linkid(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
+			    struct wpa_tdls_lnkid *lnkid)
+{
+	lnkid->ie_type = WLAN_EID_LINK_ID;
+	lnkid->ie_len = 3 * ETH_ALEN;
+	os_memcpy(lnkid->bssid, sm->bssid, ETH_ALEN);
+	if (peer->initiator) {
+		os_memcpy(lnkid->init_sta, sm->own_addr, ETH_ALEN);
+		os_memcpy(lnkid->resp_sta, peer->addr, ETH_ALEN);
+	} else {
+		os_memcpy(lnkid->init_sta, peer->addr, ETH_ALEN);
+		os_memcpy(lnkid->resp_sta, sm->own_addr, ETH_ALEN);
+	}
+}
+
+
+int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
+{
+	struct wpa_tdls_peer *peer;
+	struct wpa_tdls_ftie *ftie;
+	struct wpa_tdls_lnkid lnkid;
+	u8 dialog_token;
+	u8 *rbuf, *pos;
+	int ielen;
+
+	if (sm->tdls_disabled || !sm->tdls_supported)
+		return -1;
+
+	/* Find the node and free from the list */
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
+			   "Teardown " MACSTR, MAC2STR(addr));
+		return 0;
+	}
+
+	dialog_token = peer->dtoken;
+
+	wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown for " MACSTR,
+		   MAC2STR(addr));
+
+	ielen = 0;
+	if (wpa_tdls_get_privacy(sm) && peer->tpk_set && peer->tpk_success) {
+		/* To add FTIE for Teardown request and compute MIC */
+		ielen += sizeof(*ftie);
+#ifdef CONFIG_TDLS_TESTING
+		if (tdls_testing & TDLS_TESTING_LONG_FRAME)
+			ielen += 170;
+#endif /* CONFIG_TDLS_TESTING */
+	}
+
+	rbuf = os_zalloc(ielen + 1);
+	if (rbuf == NULL)
+		return -1;
+	pos = rbuf;
+
+	if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success)
+		goto skip_ies;
+
+	ftie = (struct wpa_tdls_ftie *) pos;
+	ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
+	/* Using the recent nonce which should be for CONFIRM frame */
+	os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
+	os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
+	ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
+	pos = (u8 *) (ftie + 1);
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
+			   "FTIE");
+		ftie->ie_len += 170;
+		*pos++ = 255; /* FTIE subelem */
+		*pos++ = 168; /* FTIE subelem length */
+		pos += 168;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+	wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TDLS Teardown handshake",
+		    (u8 *) ftie, pos - (u8 *) ftie);
+
+	/* compute MIC before sending */
+	wpa_tdls_linkid(sm, peer, &lnkid);
+	wpa_tdls_key_mic_teardown(peer->tpk.kck, 4, reason_code,
+				  dialog_token, (u8 *) &lnkid, (u8 *) ftie,
+				  ftie->mic);
+
+skip_ies:
+	/* TODO: register for a Timeout handler, if Teardown is not received at
+	 * the other end, then try again another time */
+
+	/* request driver to send Teardown using this FTIE */
+	wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_TEARDOWN, 0,
+			  WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, rbuf,
+			  pos - rbuf);
+	os_free(rbuf);
+
+	/* clear the Peerkey statemachine */
+	wpa_tdls_peer_free(sm, peer);
+
+	return 0;
+}
+
+
+int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
+{
+	struct wpa_tdls_peer *peer;
+
+	if (sm->tdls_disabled || !sm->tdls_supported)
+		return -1;
+
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer == NULL) {
+		wpa_printf(MSG_DEBUG, "TDLS: Could not find peer " MACSTR
+		   " for link Teardown", MAC2STR(addr));
+		return -1;
+	}
+
+	if (!peer->tpk_success) {
+		wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR
+		   " not connected - cannot Teardown link", MAC2STR(addr));
+		return -1;
+	}
+
+	return wpa_tdls_do_teardown(sm, peer, reason_code, 0);
+}
+
+
+void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr)
+{
+	struct wpa_tdls_peer *peer;
+
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer) {
+		wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, addr);
+		wpa_tdls_peer_free(sm, peer);
+	}
+}
+
+
+static int wpa_tdls_recv_teardown(struct wpa_sm *sm, const u8 *src_addr,
+				  const u8 *buf, size_t len)
+{
+	struct wpa_tdls_peer *peer = NULL;
+	struct wpa_tdls_ftie *ftie;
+	struct wpa_tdls_lnkid *lnkid;
+	struct wpa_eapol_ie_parse kde;
+	u16 reason_code;
+	const u8 *pos;
+	int ielen;
+
+	/* Find the node and free from the list */
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
+			   "Teardown " MACSTR, MAC2STR(src_addr));
+		return 0;
+	}
+
+	pos = buf;
+	pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
+
+	reason_code = WPA_GET_LE16(pos);
+	pos += 2;
+
+	wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown Request from " MACSTR
+		   " (reason code %u)", MAC2STR(src_addr), reason_code);
+
+	ielen = len - (pos - buf); /* start of IE in buf */
+	if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) {
+		wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in Teardown");
+		return -1;
+	}
+
+	if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
+		wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TDLS "
+			   "Teardown");
+		return -1;
+	}
+	lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
+
+	if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success)
+		goto skip_ftie;
+
+	if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
+		wpa_printf(MSG_INFO, "TDLS: No FTIE in TDLS Teardown");
+		return -1;
+	}
+
+	ftie = (struct wpa_tdls_ftie *) kde.ftie;
+
+	/* Process MIC check to see if TDLS Teardown is right */
+	if (wpa_supplicant_verify_tdls_mic_teardown(4, reason_code,
+						    peer->dtoken, peer,
+						    (u8 *) lnkid, ftie) < 0) {
+		wpa_printf(MSG_DEBUG, "TDLS: MIC failure for TDLS "
+			   "Teardown Request from " MACSTR, MAC2STR(src_addr));
+		return -1;
+	}
+
+skip_ftie:
+	/*
+	 * Request the driver to disable the direct link and clear associated
+	 * keys.
+	 */
+	wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
+
+	/* clear the Peerkey statemachine */
+	wpa_tdls_peer_free(sm, peer);
+
+	return 0;
+}
+
+
+/**
+ * wpa_tdls_send_error - To send suitable TDLS status response with
+ *	appropriate status code mentioning reason for error/failure.
+ * @dst 	- MAC addr of Peer station
+ * @tdls_action - TDLS frame type for which error code is sent
+ * @status 	- status code mentioning reason
+ */
+
+static int wpa_tdls_send_error(struct wpa_sm *sm, const u8 *dst,
+			       u8 tdls_action, u8 dialog_token, u16 status)
+{
+	wpa_printf(MSG_DEBUG, "TDLS: Sending error to " MACSTR
+		   " (action=%u status=%u)",
+		   MAC2STR(dst), tdls_action, status);
+	return wpa_tdls_tpk_send(sm, dst, tdls_action, dialog_token, status,
+				 NULL, 0);
+}
+
+
+static struct wpa_tdls_peer *
+wpa_tdls_add_peer(struct wpa_sm *sm, const u8 *addr)
+{
+	struct wpa_tdls_peer *peer;
+
+	wpa_printf(MSG_INFO, "TDLS: Creating peer entry for " MACSTR,
+		   MAC2STR(addr));
+
+	peer = os_zalloc(sizeof(*peer));
+	if (peer == NULL)
+		return NULL;
+
+	os_memcpy(peer->addr, addr, ETH_ALEN);
+	peer->next = sm->tdls;
+	sm->tdls = peer;
+
+	return peer;
+}
+
+
+static int wpa_tdls_send_tpk_m1(struct wpa_sm *sm,
+				struct wpa_tdls_peer *peer)
+{
+	size_t buf_len;
+	struct wpa_tdls_timeoutie timeoutie;
+	u16 rsn_capab;
+	struct wpa_tdls_ftie *ftie;
+	u8 *rbuf, *pos, *count_pos;
+	u16 count;
+	struct rsn_ie_hdr *hdr;
+
+	if (!wpa_tdls_get_privacy(sm)) {
+		wpa_printf(MSG_DEBUG, "TDLS: No security used on the link");
+		peer->rsnie_i_len = 0;
+		goto skip_rsnie;
+	}
+
+	/*
+	 * TPK Handshake Message 1:
+	 * FTIE: ANonce=0, SNonce=initiator nonce MIC=0, DataKDs=(RSNIE_I,
+	 * Timeout Interval IE))
+	 */
+
+	/* Filling RSN IE */
+	hdr = (struct rsn_ie_hdr *) peer->rsnie_i;
+	hdr->elem_id = WLAN_EID_RSN;
+	WPA_PUT_LE16(hdr->version, RSN_VERSION);
+
+	pos = (u8 *) (hdr + 1);
+	RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
+	pos += RSN_SELECTOR_LEN;
+	count_pos = pos;
+	pos += 2;
+
+	count = 0;
+
+	/*
+	 * AES-CCMP is the default Encryption preferred for TDLS, so
+	 * RSN IE is filled only with CCMP CIPHER
+	 * Note: TKIP is not used to encrypt TDLS link.
+	 *
+	 * Regardless of the cipher used on the AP connection, select CCMP
+	 * here.
+	 */
+	RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+	pos += RSN_SELECTOR_LEN;
+	count++;
+
+	WPA_PUT_LE16(count_pos, count);
+
+	WPA_PUT_LE16(pos, 1);
+	pos += 2;
+	RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE);
+	pos += RSN_SELECTOR_LEN;
+
+	rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
+	rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2;
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) {
+		wpa_printf(MSG_DEBUG, "TDLS: Use alternative RSN IE for "
+			   "testing");
+		rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+	WPA_PUT_LE16(pos, rsn_capab);
+	pos += 2;
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) {
+		/* Number of PMKIDs */
+		*pos++ = 0x00;
+		*pos++ = 0x00;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	hdr->len = (pos - peer->rsnie_i) - 2;
+	peer->rsnie_i_len = pos - peer->rsnie_i;
+	wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake",
+		    peer->rsnie_i, peer->rsnie_i_len);
+
+skip_rsnie:
+	buf_len = 0;
+	if (wpa_tdls_get_privacy(sm))
+		buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
+			sizeof(struct wpa_tdls_timeoutie);
+#ifdef CONFIG_TDLS_TESTING
+	if (wpa_tdls_get_privacy(sm) &&
+	    (tdls_testing & TDLS_TESTING_LONG_FRAME))
+		buf_len += 170;
+	if (tdls_testing & TDLS_TESTING_DIFF_BSSID)
+		buf_len += sizeof(struct wpa_tdls_lnkid);
+#endif /* CONFIG_TDLS_TESTING */
+	rbuf = os_zalloc(buf_len + 1);
+	if (rbuf == NULL) {
+		wpa_tdls_peer_free(sm, peer);
+		return -1;
+	}
+	pos = rbuf;
+
+	if (!wpa_tdls_get_privacy(sm))
+		goto skip_ies;
+
+	/* Initiator RSN IE */
+	pos = wpa_add_ie(pos, peer->rsnie_i, peer->rsnie_i_len);
+
+	ftie = (struct wpa_tdls_ftie *) pos;
+	ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
+	ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
+
+	if (os_get_random(peer->inonce, WPA_NONCE_LEN)) {
+		wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
+			"TDLS: Failed to get random data for initiator Nonce");
+		os_free(rbuf);
+		wpa_tdls_peer_free(sm, peer);
+		return -1;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: Initiator Nonce for TPK handshake",
+		    peer->inonce, WPA_NONCE_LEN);
+	os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
+
+	wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK Handshake M1",
+		    (u8 *) ftie, sizeof(struct wpa_tdls_ftie));
+
+	pos = (u8 *) (ftie + 1);
+
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
+			   "FTIE");
+		ftie->ie_len += 170;
+		*pos++ = 255; /* FTIE subelem */
+		*pos++ = 168; /* FTIE subelem length */
+		pos += 168;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	/* Lifetime */
+	peer->lifetime = TPK_LIFETIME;
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_SHORT_LIFETIME) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - use short TPK "
+			   "lifetime");
+		peer->lifetime = 301;
+	}
+	if (tdls_testing & TDLS_TESTING_LONG_LIFETIME) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - use long TPK "
+			   "lifetime");
+		peer->lifetime = 0xffffffff;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+	pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
+				     sizeof(timeoutie), peer->lifetime);
+	wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", peer->lifetime);
+
+skip_ies:
+
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_DIFF_BSSID) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - use incorrect BSSID in "
+			   "Link Identifier");
+		struct wpa_tdls_lnkid *l = (struct wpa_tdls_lnkid *) pos;
+		wpa_tdls_linkid(sm, peer, l);
+		l->bssid[5] ^= 0x01;
+		pos += sizeof(*l);
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Request / TPK "
+		   "Handshake Message 1 (peer " MACSTR ")",
+		   MAC2STR(peer->addr));
+
+	wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST, 1, 0,
+			  rbuf, pos - rbuf);
+	os_free(rbuf);
+
+	return 0;
+}
+
+
+static int wpa_tdls_send_tpk_m2(struct wpa_sm *sm,
+				const unsigned char *src_addr, u8 dtoken,
+				struct wpa_tdls_lnkid *lnkid,
+				const struct wpa_tdls_peer *peer)
+{
+	u8 *rbuf, *pos;
+	size_t buf_len;
+	u32 lifetime;
+	struct wpa_tdls_timeoutie timeoutie;
+	struct wpa_tdls_ftie *ftie;
+
+	buf_len = 0;
+	if (wpa_tdls_get_privacy(sm)) {
+		/* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce),
+		 * Lifetime */
+		buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
+			sizeof(struct wpa_tdls_timeoutie);
+#ifdef CONFIG_TDLS_TESTING
+		if (tdls_testing & TDLS_TESTING_LONG_FRAME)
+			buf_len += 170;
+#endif /* CONFIG_TDLS_TESTING */
+	}
+
+	rbuf = os_zalloc(buf_len + 1);
+	if (rbuf == NULL)
+		return -1;
+	pos = rbuf;
+
+	if (!wpa_tdls_get_privacy(sm))
+		goto skip_ies;
+
+	/* Peer RSN IE */
+	pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len);
+
+	ftie = (struct wpa_tdls_ftie *) pos;
+	ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
+	/* TODO: ftie->mic_control to set 2-RESPONSE */
+	os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
+	os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
+	ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
+	wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK M2",
+		    (u8 *) ftie, sizeof(*ftie));
+
+	pos = (u8 *) (ftie + 1);
+
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
+			   "FTIE");
+		ftie->ie_len += 170;
+		*pos++ = 255; /* FTIE subelem */
+		*pos++ = 168; /* FTIE subelem length */
+		pos += 168;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	/* Lifetime */
+	lifetime = peer->lifetime;
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_RESP) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK "
+			   "lifetime in response");
+		lifetime++;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+	pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
+				     sizeof(timeoutie), lifetime);
+	wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds from initiator",
+		   lifetime);
+
+	/* compute MIC before sending */
+	wpa_tdls_ftie_mic(peer->tpk.kck, 2, (u8 *) lnkid, peer->rsnie_p,
+			  (u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
+
+skip_ies:
+	wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken, 0,
+			  rbuf, pos - rbuf);
+	os_free(rbuf);
+
+	return 0;
+}
+
+
+static int wpa_tdls_send_tpk_m3(struct wpa_sm *sm,
+				const unsigned char *src_addr, u8 dtoken,
+				struct wpa_tdls_lnkid *lnkid,
+				const struct wpa_tdls_peer *peer)
+{
+	u8 *rbuf, *pos;
+	size_t buf_len;
+	struct wpa_tdls_ftie *ftie;
+	struct wpa_tdls_timeoutie timeoutie;
+	u32 lifetime;
+
+	buf_len = 0;
+	if (wpa_tdls_get_privacy(sm)) {
+		/* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce),
+		 * Lifetime */
+		buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
+			sizeof(struct wpa_tdls_timeoutie);
+#ifdef CONFIG_TDLS_TESTING
+		if (tdls_testing & TDLS_TESTING_LONG_FRAME)
+			buf_len += 170;
+#endif /* CONFIG_TDLS_TESTING */
+	}
+
+	rbuf = os_zalloc(buf_len + 1);
+	if (rbuf == NULL)
+		return -1;
+	pos = rbuf;
+
+	if (!wpa_tdls_get_privacy(sm))
+		goto skip_ies;
+
+	/* Peer RSN IE */
+	pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len);
+
+	ftie = (struct wpa_tdls_ftie *) pos;
+	ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
+	/*TODO: ftie->mic_control to set 3-CONFIRM */
+	os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
+	os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
+	ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
+
+	pos = (u8 *) (ftie + 1);
+
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
+			   "FTIE");
+		ftie->ie_len += 170;
+		*pos++ = 255; /* FTIE subelem */
+		*pos++ = 168; /* FTIE subelem length */
+		pos += 168;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	/* Lifetime */
+	lifetime = peer->lifetime;
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_CONF) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK "
+			   "lifetime in confirm");
+		lifetime++;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+	pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
+				     sizeof(timeoutie), lifetime);
+	wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds",
+		   lifetime);
+
+	/* compute MIC before sending */
+	wpa_tdls_ftie_mic(peer->tpk.kck, 3, (u8 *) lnkid, peer->rsnie_p,
+			  (u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
+
+skip_ies:
+	wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken, 0,
+			  rbuf, pos - rbuf);
+	os_free(rbuf);
+
+	return 0;
+}
+
+
+static int wpa_tdls_send_discovery_response(struct wpa_sm *sm,
+					    struct wpa_tdls_peer *peer,
+					    u8 dialog_token)
+{
+	wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Discovery Response "
+		   "(peer " MACSTR ")", MAC2STR(peer->addr));
+
+	return wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_DISCOVERY_RESPONSE,
+				 dialog_token, 0, NULL, 0);
+}
+
+
+static int
+wpa_tdls_process_discovery_request(struct wpa_sm *sm, const u8 *addr,
+				   const u8 *buf, size_t len)
+{
+	struct wpa_eapol_ie_parse kde;
+	const struct wpa_tdls_lnkid *lnkid;
+	struct wpa_tdls_peer *peer;
+	size_t min_req_len = sizeof(struct wpa_tdls_frame) +
+		1 /* dialog token */ + sizeof(struct wpa_tdls_lnkid);
+	u8 dialog_token;
+
+	wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from " MACSTR,
+		   MAC2STR(addr));
+
+	if (len < min_req_len) {
+		wpa_printf(MSG_DEBUG, "TDLS Discovery Request is too short: "
+			   "%d", (int) len);
+		return -1;
+	}
+
+	dialog_token = buf[sizeof(struct wpa_tdls_frame)];
+
+	if (wpa_supplicant_parse_ies(buf + sizeof(struct wpa_tdls_frame) + 1,
+				     len - (sizeof(struct wpa_tdls_frame) + 1),
+				     &kde) < 0)
+		return -1;
+
+	if (!kde.lnkid) {
+		wpa_printf(MSG_DEBUG, "TDLS: Link ID not found in Discovery "
+			   "Request");
+		return -1;
+	}
+
+	lnkid = (const struct wpa_tdls_lnkid *) kde.lnkid;
+
+	if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
+		wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from different "
+			   " BSS " MACSTR, MAC2STR(lnkid->bssid));
+		return -1;
+	}
+
+	peer = wpa_tdls_add_peer(sm, addr);
+	if (peer == NULL)
+		return -1;
+
+	return wpa_tdls_send_discovery_response(sm, peer, dialog_token);
+}
+
+
+int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr)
+{
+	if (sm->tdls_disabled || !sm->tdls_supported)
+		return -1;
+
+	wpa_printf(MSG_DEBUG, "TDLS: Sending Discovery Request to peer "
+		   MACSTR, MAC2STR(addr));
+	return wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_DISCOVERY_REQUEST,
+				 1, 0, NULL, 0);
+}
+
+
+static int copy_supp_rates(const struct wpa_eapol_ie_parse *kde,
+			   struct wpa_tdls_peer *peer)
+{
+	if (!kde->supp_rates) {
+		wpa_printf(MSG_DEBUG, "TDLS: No supported rates received");
+		return -1;
+	}
+
+	peer->supp_rates_len = kde->supp_rates_len - 2;
+	if (peer->supp_rates_len > IEEE80211_MAX_SUPP_RATES)
+		peer->supp_rates_len = IEEE80211_MAX_SUPP_RATES;
+	os_memcpy(peer->supp_rates, kde->supp_rates + 2, peer->supp_rates_len);
+
+	if (kde->ext_supp_rates) {
+		int clen = kde->ext_supp_rates_len - 2;
+		if (peer->supp_rates_len + clen > IEEE80211_MAX_SUPP_RATES)
+			clen = IEEE80211_MAX_SUPP_RATES - peer->supp_rates_len;
+		os_memcpy(peer->supp_rates + peer->supp_rates_len,
+			  kde->ext_supp_rates + 2, clen);
+		peer->supp_rates_len += clen;
+	}
+
+	return 0;
+}
+
+
+static int wpa_tdls_process_tpk_m1(struct wpa_sm *sm, const u8 *src_addr,
+				   const u8 *buf, size_t len)
+{
+	struct wpa_tdls_peer *peer;
+	struct wpa_eapol_ie_parse kde;
+	struct wpa_ie_data ie;
+	int cipher;
+	const u8 *cpos;
+	struct wpa_tdls_ftie *ftie = NULL;
+	struct wpa_tdls_timeoutie *timeoutie;
+	struct wpa_tdls_lnkid *lnkid;
+	u32 lifetime = 0;
+#if 0
+	struct rsn_ie_hdr *hdr;
+	u8 *pos;
+	u16 rsn_capab;
+	u16 rsn_ver;
+#endif
+	u8 dtoken;
+	u16 ielen;
+	u16 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
+	int tdls_prohibited = sm->tdls_prohibited;
+	int existing_peer = 0;
+
+	if (len < 3 + 3)
+		return -1;
+
+	cpos = buf;
+	cpos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
+
+	/* driver had already verified the frame format */
+	dtoken = *cpos++; /* dialog token */
+
+	wpa_printf(MSG_INFO, "TDLS: Dialog Token in TPK M1 %d", dtoken);
+
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0) {
+			existing_peer = 1;
+			break;
+		}
+	}
+
+	if (peer == NULL) {
+		peer = wpa_tdls_add_peer(sm, src_addr);
+		if (peer == NULL)
+			goto error;
+	}
+
+	/* capability information */
+	peer->capability = WPA_GET_LE16(cpos);
+	cpos += 2;
+
+	ielen = len - (cpos - buf); /* start of IE in buf */
+	if (wpa_supplicant_parse_ies(cpos, ielen, &kde) < 0) {
+		wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M1");
+		goto error;
+	}
+
+	if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
+		wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
+			   "TPK M1");
+		goto error;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M1",
+		    kde.lnkid, kde.lnkid_len);
+	lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
+	if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
+		wpa_printf(MSG_INFO, "TDLS: TPK M1 from diff BSS");
+		status = WLAN_STATUS_NOT_IN_SAME_BSS;
+		goto error;
+	}
+
+	wpa_printf(MSG_DEBUG, "TDLS: TPK M1 - TPK initiator " MACSTR,
+		   MAC2STR(src_addr));
+
+	if (copy_supp_rates(&kde, peer) < 0)
+		goto error;
+
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) {
+		for (peer = sm->tdls; peer; peer = peer->next) {
+			if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
+				break;
+		}
+		if (peer == NULL) {
+			peer = wpa_tdls_add_peer(sm, src_addr);
+			if (peer == NULL)
+				goto error;
+		}
+		wpa_printf(MSG_DEBUG, "TDLS: Testing concurrent initiation of "
+			   "TDLS setup - send own request");
+		peer->initiator = 1;
+		wpa_tdls_send_tpk_m1(sm, peer);
+	}
+
+	if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
+	    tdls_prohibited) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
+			   "on TDLS");
+		tdls_prohibited = 0;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	if (tdls_prohibited) {
+		wpa_printf(MSG_INFO, "TDLS: TDLS prohibited in this BSS");
+		status = WLAN_STATUS_REQUEST_DECLINED;
+		goto error;
+	}
+
+	if (!wpa_tdls_get_privacy(sm)) {
+		if (kde.rsn_ie) {
+			wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M1 while "
+				   "security is disabled");
+			status = WLAN_STATUS_SECURITY_DISABLED;
+			goto error;
+		}
+		goto skip_rsn;
+	}
+
+	if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
+	    kde.rsn_ie == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M1");
+		status = WLAN_STATUS_INVALID_PARAMETERS;
+		goto error;
+	}
+
+	if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) {
+		wpa_printf(MSG_INFO, "TDLS: Too long Initiator RSN IE in "
+			   "TPK M1");
+		status = WLAN_STATUS_INVALID_RSNIE;
+		goto error;
+	}
+
+	if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
+		wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M1");
+		status = WLAN_STATUS_INVALID_RSNIE;
+		goto error;
+	}
+
+	cipher = ie.pairwise_cipher;
+	if (cipher & WPA_CIPHER_CCMP) {
+		wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
+		cipher = WPA_CIPHER_CCMP;
+	} else {
+		wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M1");
+		status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
+		goto error;
+	}
+
+	if ((ie.capabilities &
+	     (WPA_CAPABILITY_NO_PAIRWISE | WPA_CAPABILITY_PEERKEY_ENABLED)) !=
+	    WPA_CAPABILITY_PEERKEY_ENABLED) {
+		wpa_printf(MSG_INFO, "TDLS: Invalid RSN Capabilities in "
+			   "TPK M1");
+		status = WLAN_STATUS_INVALID_RSN_IE_CAPAB;
+		goto error;
+	}
+
+	/* Lifetime */
+	if (kde.key_lifetime == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M1");
+		status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+		goto error;
+	}
+	timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
+	lifetime = WPA_GET_LE32(timeoutie->value);
+	wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", lifetime);
+	if (lifetime < 300) {
+		wpa_printf(MSG_INFO, "TDLS: Too short TPK lifetime");
+		status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+		goto error;
+	}
+
+skip_rsn:
+	/* If found, use existing entry instead of adding a new one;
+	 * how to handle the case where both ends initiate at the
+	 * same time? */
+	if (existing_peer) {
+		if (peer->tpk_success) {
+			wpa_printf(MSG_DEBUG, "TDLS: TDLS Setup Request while "
+				   "direct link is enabled - tear down the "
+				   "old link first");
+#if 0
+			/* TODO: Disabling the link would be more proper
+			 * operation here, but it seems to trigger a race with
+			 * some drivers handling the new request frame. */
+			wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
+#else
+			if (sm->tdls_external_setup)
+				wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK,
+						 src_addr);
+			else
+				wpa_tdls_del_key(sm, peer);
+#endif
+			wpa_tdls_peer_free(sm, peer);
+		}
+
+		/*
+		 * An entry is already present, so check if we already sent a
+		 * TDLS Setup Request. If so, compare MAC addresses and let the
+		 * STA with the lower MAC address continue as the initiator.
+		 * The other negotiation is terminated.
+		 */
+		if (peer->initiator) {
+			if (os_memcmp(sm->own_addr, src_addr, ETH_ALEN) < 0) {
+				wpa_printf(MSG_DEBUG, "TDLS: Discard request "
+					   "from peer with higher address "
+					   MACSTR, MAC2STR(src_addr));
+				return -1;
+			} else {
+				wpa_printf(MSG_DEBUG, "TDLS: Accept request "
+					   "from peer with lower address "
+					   MACSTR " (terminate previously "
+					   "initiated negotiation",
+					   MAC2STR(src_addr));
+				wpa_tdls_peer_free(sm, peer);
+			}
+		}
+	}
+
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) {
+		if (os_memcmp(sm->own_addr, peer->addr, ETH_ALEN) < 0) {
+			/*
+			 * The request frame from us is going to win, so do not
+			 * replace information based on this request frame from
+			 * the peer.
+			 */
+			goto skip_rsn_check;
+		}
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	peer->initiator = 0; /* Need to check */
+	peer->dtoken = dtoken;
+
+	if (!wpa_tdls_get_privacy(sm)) {
+		peer->rsnie_i_len = 0;
+		peer->rsnie_p_len = 0;
+		peer->cipher = WPA_CIPHER_NONE;
+		goto skip_rsn_check;
+	}
+
+	ftie = (struct wpa_tdls_ftie *) kde.ftie;
+	os_memcpy(peer->inonce, ftie->Snonce, WPA_NONCE_LEN);
+	os_memcpy(peer->rsnie_i, kde.rsn_ie, kde.rsn_ie_len);
+	peer->rsnie_i_len = kde.rsn_ie_len;
+	peer->cipher = cipher;
+
+	if (os_get_random(peer->rnonce, WPA_NONCE_LEN)) {
+		wpa_msg(sm->ctx->ctx, MSG_WARNING,
+			"TDLS: Failed to get random data for responder nonce");
+		wpa_tdls_peer_free(sm, peer);
+		goto error;
+	}
+
+#if 0
+	/* get version info from RSNIE received from Peer */
+	hdr = (struct rsn_ie_hdr *) kde.rsn_ie;
+	rsn_ver = WPA_GET_LE16(hdr->version);
+
+	/* use min(peer's version, out version) */
+	if (rsn_ver > RSN_VERSION)
+		rsn_ver = RSN_VERSION;
+
+	hdr = (struct rsn_ie_hdr *) peer->rsnie_p;
+
+	hdr->elem_id = WLAN_EID_RSN;
+	WPA_PUT_LE16(hdr->version, rsn_ver);
+	pos = (u8 *) (hdr + 1);
+
+	RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
+	pos += RSN_SELECTOR_LEN;
+	/* Include only the selected cipher in pairwise cipher suite */
+	WPA_PUT_LE16(pos, 1);
+	pos += 2;
+	if (cipher == WPA_CIPHER_CCMP)
+		RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
+	pos += RSN_SELECTOR_LEN;
+
+	WPA_PUT_LE16(pos, 1);
+	pos += 2;
+	RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE);
+	pos += RSN_SELECTOR_LEN;
+
+	rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
+	rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2;
+	WPA_PUT_LE16(pos, rsn_capab);
+	pos += 2;
+
+	hdr->len = (pos - peer->rsnie_p) - 2;
+	peer->rsnie_p_len = pos - peer->rsnie_p;
+#endif
+
+	/* temp fix: validation of RSNIE later */
+	os_memcpy(peer->rsnie_p, peer->rsnie_i, peer->rsnie_i_len);
+	peer->rsnie_p_len = peer->rsnie_i_len;
+
+	wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake",
+		    peer->rsnie_p, peer->rsnie_p_len);
+
+	peer->lifetime = lifetime;
+
+	wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
+
+skip_rsn_check:
+	/* add the peer to the driver as a "setup in progress" peer */
+	wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, NULL, 0);
+
+	wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Response / TPK M2");
+	if (wpa_tdls_send_tpk_m2(sm, src_addr, dtoken, lnkid, peer) < 0) {
+		wpa_tdls_disable_link(sm, peer->addr);
+		goto error;
+	}
+
+	return 0;
+
+error:
+	wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken,
+			    status);
+	return -1;
+}
+
+
+static void wpa_tdls_enable_link(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+{
+	peer->tpk_success = 1;
+	eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
+	if (wpa_tdls_get_privacy(sm)) {
+		u32 lifetime = peer->lifetime;
+		/*
+		 * Start the initiator process a bit earlier to avoid race
+		 * condition with the responder sending teardown request.
+		 */
+		if (lifetime > 3 && peer->initiator)
+			lifetime -= 3;
+		eloop_register_timeout(lifetime, 0, wpa_tdls_tpk_timeout,
+				       sm, peer);
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_NO_TPK_EXPIRATION) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - disable TPK "
+			   "expiration");
+		eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
+	}
+#endif /* CONFIG_TDLS_TESTING */
+	}
+
+	/* add supported rates and capabilities to the TDLS peer */
+	wpa_sm_tdls_peer_addset(sm, peer->addr, 0, peer->capability,
+				peer->supp_rates, peer->supp_rates_len);
+
+	wpa_sm_tdls_oper(sm, TDLS_ENABLE_LINK, peer->addr);
+}
+
+
+static int wpa_tdls_process_tpk_m2(struct wpa_sm *sm, const u8 *src_addr,
+				   const u8 *buf, size_t len)
+{
+	struct wpa_tdls_peer *peer;
+	struct wpa_eapol_ie_parse kde;
+	struct wpa_ie_data ie;
+	int cipher;
+	struct wpa_tdls_ftie *ftie;
+	struct wpa_tdls_timeoutie *timeoutie;
+	struct wpa_tdls_lnkid *lnkid;
+	u32 lifetime;
+	u8 dtoken;
+	int ielen;
+	u16 status;
+	const u8 *pos;
+
+	wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Response / TPK M2 "
+		   "(Peer " MACSTR ")", MAC2STR(src_addr));
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
+			break;
+	}
+	if (peer == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No matching peer found for "
+			   "TPK M2: " MACSTR, MAC2STR(src_addr));
+		return -1;
+	}
+	wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_REQUEST);
+
+	if (len < 3 + 2 + 1)
+		return -1;
+	pos = buf;
+	pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
+	status = WPA_GET_LE16(pos);
+	pos += 2 /* status code */;
+
+	if (status != WLAN_STATUS_SUCCESS) {
+		wpa_printf(MSG_INFO, "TDLS: Status code in TPK M2: %u",
+			   status);
+		if (sm->tdls_external_setup)
+			wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
+		return -1;
+	}
+
+	status = WLAN_STATUS_UNSPECIFIED_FAILURE;
+
+	/* TODO: need to verify dialog token matches here or in kernel */
+	dtoken = *pos++; /* dialog token */
+
+	wpa_printf(MSG_DEBUG, "TDLS: Dialog Token in TPK M2 %d", dtoken);
+
+	if (len < 3 + 2 + 1 + 2)
+		return -1;
+
+	/* capability information */
+	peer->capability = WPA_GET_LE16(pos);
+	pos += 2;
+
+	ielen = len - (pos - buf); /* start of IE in buf */
+	if (wpa_supplicant_parse_ies(pos, ielen, &kde) < 0) {
+		wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M2");
+		goto error;
+	}
+
+#ifdef CONFIG_TDLS_TESTING
+	if (tdls_testing & TDLS_TESTING_DECLINE_RESP) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - decline response");
+		status = WLAN_STATUS_REQUEST_DECLINED;
+		goto error;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
+		wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
+			   "TPK M2");
+		goto error;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M2",
+		    kde.lnkid, kde.lnkid_len);
+	lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
+
+	if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
+		wpa_printf(MSG_INFO, "TDLS: TPK M2 from different BSS");
+		status = WLAN_STATUS_NOT_IN_SAME_BSS;
+		goto error;
+	}
+
+	if (copy_supp_rates(&kde, peer) < 0)
+		goto error;
+
+	if (!wpa_tdls_get_privacy(sm)) {
+		peer->rsnie_p_len = 0;
+		peer->cipher = WPA_CIPHER_NONE;
+		goto skip_rsn;
+	}
+
+	if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
+	    kde.rsn_ie == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M2");
+		status = WLAN_STATUS_INVALID_PARAMETERS;
+		goto error;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
+		    kde.rsn_ie, kde.rsn_ie_len);
+
+	/*
+	 * FIX: bitwise comparison of RSN IE is not the correct way of
+	 * validation this. It can be different, but certain fields must
+	 * match. Since we list only a single pairwise cipher in TPK M1, the
+	 * memcmp is likely to work in most cases, though.
+	 */
+	if (kde.rsn_ie_len != peer->rsnie_i_len ||
+	    os_memcmp(peer->rsnie_i, kde.rsn_ie, peer->rsnie_i_len) != 0) {
+		wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M2 does "
+			   "not match with RSN IE used in TPK M1");
+		wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Sent in TPK M1",
+			    peer->rsnie_i, peer->rsnie_i_len);
+		wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
+			    kde.rsn_ie, kde.rsn_ie_len);
+		status = WLAN_STATUS_INVALID_RSNIE;
+		goto error;
+	}
+
+	if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
+		wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M2");
+		status = WLAN_STATUS_INVALID_RSNIE;
+		goto error;
+	}
+
+	cipher = ie.pairwise_cipher;
+	if (cipher == WPA_CIPHER_CCMP) {
+		wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
+		cipher = WPA_CIPHER_CCMP;
+	} else {
+		wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M2");
+		status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
+		goto error;
+	}
+
+	wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M2",
+		    kde.ftie, sizeof(*ftie));
+	ftie = (struct wpa_tdls_ftie *) kde.ftie;
+
+	if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
+		wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M2 does "
+			   "not match with FTIE SNonce used in TPK M1");
+		/* Silently discard the frame */
+		return -1;
+	}
+
+	/* Responder Nonce and RSN IE */
+	os_memcpy(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN);
+	os_memcpy(peer->rsnie_p, kde.rsn_ie, kde.rsn_ie_len);
+	peer->rsnie_p_len = kde.rsn_ie_len;
+	peer->cipher = cipher;
+
+	/* Lifetime */
+	if (kde.key_lifetime == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M2");
+		status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+		goto error;
+	}
+	timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
+	lifetime = WPA_GET_LE32(timeoutie->value);
+	wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M2",
+		   lifetime);
+	if (lifetime != peer->lifetime) {
+		wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
+			   "TPK M2 (expected %u)", lifetime, peer->lifetime);
+		status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+		goto error;
+	}
+
+	wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
+
+	/* Process MIC check to see if TPK M2 is right */
+	if (wpa_supplicant_verify_tdls_mic(2, peer, (u8 *) lnkid,
+					   (u8 *) timeoutie, ftie) < 0) {
+		/* Discard the frame */
+		wpa_tdls_del_key(sm, peer);
+		wpa_tdls_peer_free(sm, peer);
+		if (sm->tdls_external_setup)
+			wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
+		return -1;
+	}
+
+	wpa_tdls_set_key(sm, peer);
+
+skip_rsn:
+	peer->dtoken = dtoken;
+
+	wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Confirm / "
+		   "TPK Handshake Message 3");
+	wpa_tdls_send_tpk_m3(sm, src_addr, dtoken, lnkid, peer);
+
+	wpa_tdls_enable_link(sm, peer);
+
+	return 0;
+
+error:
+	wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken,
+			    status);
+	if (sm->tdls_external_setup)
+		wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
+	return -1;
+}
+
+
+static int wpa_tdls_process_tpk_m3(struct wpa_sm *sm, const u8 *src_addr,
+				   const u8 *buf, size_t len)
+{
+	struct wpa_tdls_peer *peer;
+	struct wpa_eapol_ie_parse kde;
+	struct wpa_tdls_ftie *ftie;
+	struct wpa_tdls_timeoutie *timeoutie;
+	struct wpa_tdls_lnkid *lnkid;
+	int ielen;
+	u16 status;
+	const u8 *pos;
+	u32 lifetime;
+
+	wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Confirm / TPK M3 "
+		   "(Peer " MACSTR ")", MAC2STR(src_addr));
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
+			break;
+	}
+	if (peer == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No matching peer found for "
+			   "TPK M3: " MACSTR, MAC2STR(src_addr));
+		return -1;
+	}
+	wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_RESPONSE);
+
+	if (len < 3 + 3)
+		return -1;
+	pos = buf;
+	pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
+
+	status = WPA_GET_LE16(pos);
+
+	if (status != 0) {
+		wpa_printf(MSG_INFO, "TDLS: Status code in TPK M3: %u",
+			   status);
+		if (sm->tdls_external_setup)
+			wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
+		return -1;
+	}
+	pos += 2 /* status code */ + 1 /* dialog token */;
+
+	ielen = len - (pos - buf); /* start of IE in buf */
+	if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) {
+		wpa_printf(MSG_INFO, "TDLS: Failed to parse KDEs in TPK M3");
+		return -1;
+	}
+
+	if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
+		wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TPK M3");
+		return -1;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M3",
+		    (u8 *) kde.lnkid, kde.lnkid_len);
+	lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
+
+	if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
+		wpa_printf(MSG_INFO, "TDLS: TPK M3 from diff BSS");
+		return -1;
+	}
+
+	if (!wpa_tdls_get_privacy(sm))
+		goto skip_rsn;
+
+	if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
+		wpa_printf(MSG_INFO, "TDLS: No FTIE in TPK M3");
+		return -1;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M3",
+		    kde.ftie, sizeof(*ftie));
+	ftie = (struct wpa_tdls_ftie *) kde.ftie;
+
+	if (kde.rsn_ie == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No RSN IE in TPK M3");
+		return -1;
+	}
+	wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M3",
+		    kde.rsn_ie, kde.rsn_ie_len);
+	if (kde.rsn_ie_len != peer->rsnie_p_len ||
+	    os_memcmp(kde.rsn_ie, peer->rsnie_p, peer->rsnie_p_len) != 0) {
+		wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M3 does not match "
+			   "with the one sent in TPK M2");
+		return -1;
+	}
+
+	if (!os_memcmp(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN) == 0) {
+		wpa_printf(MSG_INFO, "TDLS: FTIE ANonce in TPK M3 does "
+			   "not match with FTIE ANonce used in TPK M2");
+		return -1;
+	}
+
+	if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
+		wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M3 does not "
+			   "match with FTIE SNonce used in TPK M1");
+		return -1;
+	}
+
+	if (kde.key_lifetime == NULL) {
+		wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M3");
+		return -1;
+	}
+	timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
+	wpa_hexdump(MSG_DEBUG, "TDLS: Timeout IE Received from TPK M3",
+		    (u8 *) timeoutie, sizeof(*timeoutie));
+	lifetime = WPA_GET_LE32(timeoutie->value);
+	wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M3",
+		   lifetime);
+	if (lifetime != peer->lifetime) {
+		wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
+			   "TPK M3 (expected %u)", lifetime, peer->lifetime);
+		if (sm->tdls_external_setup)
+			wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
+		return -1;
+	}
+
+	if (wpa_supplicant_verify_tdls_mic(3, peer, (u8 *) lnkid,
+					   (u8 *) timeoutie, ftie) < 0) {
+		wpa_tdls_del_key(sm, peer);
+		wpa_tdls_peer_free(sm, peer);
+		return -1;
+	}
+
+	if (wpa_tdls_set_key(sm, peer) < 0)
+		return -1;
+
+skip_rsn:
+	wpa_tdls_enable_link(sm, peer);
+
+	return 0;
+}
+
+
+static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs)
+{
+	struct wpa_tdls_timeoutie *lifetime = (struct wpa_tdls_timeoutie *) ie;
+
+	os_memset(lifetime, 0, ie_len);
+	lifetime->ie_type = WLAN_EID_TIMEOUT_INTERVAL;
+	lifetime->ie_len = sizeof(struct wpa_tdls_timeoutie) - 2;
+	lifetime->interval_type = WLAN_TIMEOUT_KEY_LIFETIME;
+	WPA_PUT_LE32(lifetime->value, tsecs);
+	os_memcpy(pos, ie, ie_len);
+	return pos + ie_len;
+}
+
+
+/**
+ * wpa_tdls_start - Initiate TDLS handshake (send TPK Handshake Message 1)
+ * @sm: Pointer to WPA state machine data from wpa_sm_init()
+ * @peer: MAC address of the peer STA
+ * Returns: 0 on success, or -1 on failure
+ *
+ * Send TPK Handshake Message 1 info to driver to start TDLS
+ * handshake with the peer.
+ */
+int wpa_tdls_start(struct wpa_sm *sm, const u8 *addr)
+{
+	struct wpa_tdls_peer *peer;
+	int tdls_prohibited = sm->tdls_prohibited;
+
+	if (sm->tdls_disabled || !sm->tdls_supported)
+		return -1;
+
+#ifdef CONFIG_TDLS_TESTING
+	if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
+	    tdls_prohibited) {
+		wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
+			   "on TDLS");
+		tdls_prohibited = 0;
+	}
+#endif /* CONFIG_TDLS_TESTING */
+
+	if (tdls_prohibited) {
+		wpa_printf(MSG_DEBUG, "TDLS: TDLS is prohibited in this BSS - "
+			   "reject request to start setup");
+		return -1;
+	}
+
+	/* Find existing entry and if found, use that instead of adding
+	 * a new one */
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer == NULL) {
+		peer = wpa_tdls_add_peer(sm, addr);
+		if (peer == NULL)
+			return -1;
+	}
+
+	peer->initiator = 1;
+
+	/* add the peer to the driver as a "setup in progress" peer */
+	wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, NULL, 0);
+
+	if (wpa_tdls_send_tpk_m1(sm, peer) < 0) {
+		wpa_tdls_disable_link(sm, peer->addr);
+		return -1;
+	}
+
+	return 0;
+}
+
+
+int wpa_tdls_reneg(struct wpa_sm *sm, const u8 *addr)
+{
+	struct wpa_tdls_peer *peer;
+
+	if (sm->tdls_disabled || !sm->tdls_supported)
+		return -1;
+
+	for (peer = sm->tdls; peer; peer = peer->next) {
+		if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+			break;
+	}
+
+	if (peer == NULL || !peer->tpk_success)
+		return -1;
+
+	if (sm->tdls_external_setup) {
+		/*
+		 * Disable previous link to allow renegotiation to be completed
+		 * on AP path.
+		 */
+		wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
+	}
+
+	return wpa_tdls_start(sm, addr);
+}
+
+
+/**
+ * wpa_supplicant_rx_tdls - Receive TDLS data frame
+ *
+ * This function is called to receive TDLS (ethertype = 0x890d) data frames.
+ */
+static void wpa_supplicant_rx_tdls(void *ctx, const u8 *src_addr,
+				   const u8 *buf, size_t len)
+{
+	struct wpa_sm *sm = ctx;
+	struct wpa_tdls_frame *tf;
+
+	wpa_hexdump(MSG_DEBUG, "TDLS: Received Data frame encapsulation",
+		    buf, len);
+
+	if (sm->tdls_disabled || !sm->tdls_supported) {
+		wpa_printf(MSG_DEBUG, "TDLS: Discard message - TDLS disabled "
+			   "or unsupported by driver");
+		return;
+	}
+
+	if (os_memcmp(src_addr, sm->own_addr, ETH_ALEN) == 0) {
+		wpa_printf(MSG_DEBUG, "TDLS: Discard copy of own message");
+		return;
+	}
+
+	if (len < sizeof(*tf)) {
+		wpa_printf(MSG_INFO, "TDLS: Drop too short frame");
+		return;
+	}
+
+	/* Check to make sure its a valid encapsulated TDLS frame */
+	tf = (struct wpa_tdls_frame *) buf;
+	if (tf->payloadtype != 2 /* TDLS_RFTYPE */ ||
+	    tf->category != WLAN_ACTION_TDLS) {
+		wpa_printf(MSG_INFO, "TDLS: Invalid frame - payloadtype=%u "
+			   "category=%u action=%u",
+			   tf->payloadtype, tf->category, tf->action);
+		return;
+	}
+
+	switch (tf->action) {
+	case WLAN_TDLS_SETUP_REQUEST:
+		wpa_tdls_process_tpk_m1(sm, src_addr, buf, len);
+		break;
+	case WLAN_TDLS_SETUP_RESPONSE:
+		wpa_tdls_process_tpk_m2(sm, src_addr, buf, len);
+		break;
+	case WLAN_TDLS_SETUP_CONFIRM:
+		wpa_tdls_process_tpk_m3(sm, src_addr, buf, len);
+		break;
+	case WLAN_TDLS_TEARDOWN:
+		wpa_tdls_recv_teardown(sm, src_addr, buf, len);
+		break;
+	case WLAN_TDLS_DISCOVERY_REQUEST:
+		wpa_tdls_process_discovery_request(sm, src_addr, buf, len);
+		break;
+	default:
+		/* Kernel code will process remaining frames */
+		wpa_printf(MSG_DEBUG, "TDLS: Ignore TDLS frame action code %u",
+			   tf->action);
+		break;
+	}
+}
+
+
+/**
+ * wpa_tdls_init - Initialize driver interface parameters for TDLS
+ * @wpa_s: Pointer to wpa_supplicant data
+ * Returns: 0 on success, -1 on failure
+ *
+ * This function is called to initialize driver interface parameters for TDLS.
+ * wpa_drv_init() must have been called before this function to initialize the
+ * driver interface.
+ */
+int wpa_tdls_init(struct wpa_sm *sm)
+{
+	if (sm == NULL)
+		return -1;
+
+	sm->l2_tdls = l2_packet_init(sm->bridge_ifname ? sm->bridge_ifname :
+				     sm->ifname,
+				     sm->own_addr,
+				     ETH_P_80211_ENCAP, wpa_supplicant_rx_tdls,
+				     sm, 0);
+	if (sm->l2_tdls == NULL) {
+		wpa_printf(MSG_ERROR, "TDLS: Failed to open l2_packet "
+			   "connection");
+		return -1;
+	}
+
+	/*
+	 * Drivers that support TDLS but don't implement the get_capa callback
+	 * are assumed to perform everything internally
+	 */
+	if (wpa_sm_tdls_get_capa(sm, &sm->tdls_supported,
+				 &sm->tdls_external_setup) < 0) {
+		sm->tdls_supported = 1;
+		sm->tdls_external_setup = 0;
+	}
+
+	wpa_printf(MSG_DEBUG, "TDLS: TDLS operation%s supported by "
+		   "driver", sm->tdls_supported ? "" : " not");
+	wpa_printf(MSG_DEBUG, "TDLS: Driver uses %s link setup",
+		   sm->tdls_external_setup ? "external" : "internal");
+
+	return 0;
+}
+
+
+static void wpa_tdls_remove_peers(struct wpa_sm *sm)
+{
+	struct wpa_tdls_peer *peer, *tmp;
+
+	peer = sm->tdls;
+	sm->tdls = NULL;
+
+	while (peer) {
+		int res;
+		tmp = peer->next;
+		res = wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
+		wpa_printf(MSG_DEBUG, "TDLS: Remove peer " MACSTR " (res=%d)",
+			   MAC2STR(peer->addr), res);
+		wpa_tdls_peer_free(sm, peer);
+		os_free(peer);
+		peer = tmp;
+	}
+}
+
+
+/**
+ * wpa_tdls_deinit - Deinitialize driver interface parameters for TDLS
+ *
+ * This function is called to recover driver interface parameters for TDLS
+ * and frees resources allocated for it.
+ */
+void wpa_tdls_deinit(struct wpa_sm *sm)
+{
+	if (sm == NULL)
+		return;
+
+	if (sm->l2_tdls)
+		l2_packet_deinit(sm->l2_tdls);
+	sm->l2_tdls = NULL;
+
+	wpa_tdls_remove_peers(sm);
+}
+
+
+void wpa_tdls_assoc(struct wpa_sm *sm)
+{
+	wpa_printf(MSG_DEBUG, "TDLS: Remove peers on association");
+	wpa_tdls_remove_peers(sm);
+}
+
+
+void wpa_tdls_disassoc(struct wpa_sm *sm)
+{
+	wpa_printf(MSG_DEBUG, "TDLS: Remove peers on disassociation");
+	wpa_tdls_remove_peers(sm);
+}
+
+
+static int wpa_tdls_prohibited(const u8 *ies, size_t len)
+{
+	struct wpa_eapol_ie_parse elems;
+
+	if (ies == NULL)
+		return 0;
+
+	if (wpa_supplicant_parse_ies(ies, len, &elems) < 0)
+		return 0;
+
+	if (elems.ext_capab == NULL || elems.ext_capab_len < 2 + 5)
+		return 0;
+
+	 /* bit 38 - TDLS Prohibited */
+	return !!(elems.ext_capab[2 + 4] & 0x40);
+}
+
+
+void wpa_tdls_ap_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
+{
+	sm->tdls_prohibited = wpa_tdls_prohibited(ies, len);
+	wpa_printf(MSG_DEBUG, "TDLS: TDLS is %s in the target BSS",
+		   sm->tdls_prohibited ? "prohibited" : "allowed");
+}
+
+
+void wpa_tdls_assoc_resp_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
+{
+	if (!sm->tdls_prohibited && wpa_tdls_prohibited(ies, len)) {
+		wpa_printf(MSG_DEBUG, "TDLS: TDLS prohibited based on "
+			   "(Re)Association Response IEs");
+		sm->tdls_prohibited = 1;
+	}
+}
+
+
+void wpa_tdls_enable(struct wpa_sm *sm, int enabled)
+{
+	wpa_printf(MSG_DEBUG, "TDLS: %s", enabled ? "enabled" : "disabled");
+	sm->tdls_disabled = !enabled;
+}
+
+
+int wpa_tdls_is_external_setup(struct wpa_sm *sm)
+{
+	return sm->tdls_external_setup;
+}