2 * wpa_supplicant - TDLS
3 * Copyright (c) 2010-2011, Atheros Communications
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
15 #include "utils/includes.h"
17 #include "utils/common.h"
18 #include "utils/eloop.h"
20 #include "common/ieee802_11_defs.h"
21 #include "crypto/sha256.h"
22 #include "crypto/crypto.h"
23 #include "crypto/aes_wrap.h"
24 #include "rsn_supp/wpa.h"
25 #include "rsn_supp/wpa_ie.h"
26 #include "rsn_supp/wpa_i.h"
27 #include "drivers/driver.h"
28 #include "l2_packet/l2_packet.h"
30 #ifdef CONFIG_TDLS_TESTING
31 #define TDLS_TESTING_LONG_FRAME BIT(0)
32 #define TDLS_TESTING_ALT_RSN_IE BIT(1)
33 #define TDLS_TESTING_DIFF_BSSID BIT(2)
34 #define TDLS_TESTING_SHORT_LIFETIME BIT(3)
35 #define TDLS_TESTING_WRONG_LIFETIME_RESP BIT(4)
36 #define TDLS_TESTING_WRONG_LIFETIME_CONF BIT(5)
37 #define TDLS_TESTING_LONG_LIFETIME BIT(6)
38 #define TDLS_TESTING_CONCURRENT_INIT BIT(7)
39 #define TDLS_TESTING_NO_TPK_EXPIRATION BIT(8)
40 #define TDLS_TESTING_DECLINE_RESP BIT(9)
41 #define TDLS_TESTING_IGNORE_AP_PROHIBIT BIT(10)
42 unsigned int tdls_testing = 0;
43 #endif /* CONFIG_TDLS_TESTING */
45 #define TPK_LIFETIME 43200 /* 12 hours */
46 #define TPK_RETRY_COUNT 3
47 #define TPK_TIMEOUT 5000 /* in milliseconds */
49 #define TDLS_MIC_LEN 16
51 #define TDLS_TIMEOUT_LEN 4
53 struct wpa_tdls_ftie {
54 u8 ie_type; /* FTIE */
58 u8 Anonce[WPA_NONCE_LEN]; /* Responder Nonce in TDLS */
59 u8 Snonce[WPA_NONCE_LEN]; /* Initiator Nonce in TDLS */
60 /* followed by optional elements */
63 struct wpa_tdls_timeoutie {
64 u8 ie_type; /* Timeout IE */
67 u8 value[TDLS_TIMEOUT_LEN];
70 struct wpa_tdls_lnkid {
71 u8 ie_type; /* Link Identifier IE */
74 u8 init_sta[ETH_ALEN];
75 u8 resp_sta[ETH_ALEN];
78 /* TDLS frame headers as per IEEE Std 802.11z-2010 */
79 struct wpa_tdls_frame {
80 u8 payloadtype; /* IEEE80211_TDLS_RFTYPE */
81 u8 category; /* Category */
82 u8 action; /* Action (enum tdls_frame_type) */
85 static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs);
86 static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx);
87 static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer);
90 #define TDLS_MAX_IE_LEN 80
91 #define IEEE80211_MAX_SUPP_RATES 32
93 struct wpa_tdls_peer {
94 struct wpa_tdls_peer *next;
95 int initiator; /* whether this end was initiator for TDLS setup */
96 u8 addr[ETH_ALEN]; /* other end MAC address */
97 u8 inonce[WPA_NONCE_LEN]; /* Initiator Nonce */
98 u8 rnonce[WPA_NONCE_LEN]; /* Responder Nonce */
99 u8 rsnie_i[TDLS_MAX_IE_LEN]; /* Initiator RSN IE */
101 u8 rsnie_p[TDLS_MAX_IE_LEN]; /* Peer RSN IE */
104 int cipher; /* Selected cipher (WPA_CIPHER_*) */
108 u8 kck[16]; /* TPK-KCK */
109 u8 tk[16]; /* TPK-TK; assuming only CCMP will be used */
116 int count; /* Retry Count */
117 int timer; /* Timeout in milliseconds */
118 u8 action_code; /* TDLS frame type */
121 int buf_len; /* length of TPK message for retransmission */
122 u8 *buf; /* buffer for TPK message */
127 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
128 size_t supp_rates_len;
132 static int wpa_tdls_get_privacy(struct wpa_sm *sm)
135 * Get info needed from supplicant to check if the current BSS supports
136 * security. Other than OPEN mode, rest are considered secured
137 * WEP/WPA/WPA2 hence TDLS frames are processed for TPK handshake.
139 return sm->pairwise_cipher != WPA_CIPHER_NONE;
143 static u8 * wpa_add_ie(u8 *pos, const u8 *ie, size_t ie_len)
145 os_memcpy(pos, ie, ie_len);
150 static int wpa_tdls_del_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
152 if (wpa_sm_set_key(sm, WPA_ALG_NONE, peer->addr,
153 0, 0, NULL, 0, NULL, 0) < 0) {
154 wpa_printf(MSG_WARNING, "TDLS: Failed to delete TPK-TK from "
163 static int wpa_tdls_set_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
169 os_memset(rsc, 0, 6);
171 switch (peer->cipher) {
172 case WPA_CIPHER_CCMP:
176 case WPA_CIPHER_NONE:
177 wpa_printf(MSG_DEBUG, "TDLS: Pairwise Cipher Suite: "
178 "NONE - do not use pairwise keys");
181 wpa_printf(MSG_WARNING, "TDLS: Unsupported pairwise cipher %d",
182 sm->pairwise_cipher);
186 if (wpa_sm_set_key(sm, alg, peer->addr, -1, 1,
187 rsc, sizeof(rsc), peer->tpk.tk, key_len) < 0) {
188 wpa_printf(MSG_WARNING, "TDLS: Failed to set TPK to the "
196 static int wpa_tdls_send_tpk_msg(struct wpa_sm *sm, const u8 *dst,
197 u8 action_code, u8 dialog_token,
198 u16 status_code, const u8 *buf, size_t len)
200 return wpa_sm_send_tdls_mgmt(sm, dst, action_code, dialog_token,
201 status_code, buf, len);
205 static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
206 u8 dialog_token, u16 status_code,
207 const u8 *msg, size_t msg_len)
209 struct wpa_tdls_peer *peer;
211 wpa_printf(MSG_DEBUG, "TDLS: TPK send dest=" MACSTR " action_code=%u "
212 "dialog_token=%u status_code=%u msg_len=%u",
213 MAC2STR(dest), action_code, dialog_token, status_code,
214 (unsigned int) msg_len);
216 if (wpa_tdls_send_tpk_msg(sm, dest, action_code, dialog_token,
217 status_code, msg, msg_len)) {
218 wpa_printf(MSG_INFO, "TDLS: Failed to send message "
219 "(action_code=%u)", action_code);
223 if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
224 action_code == WLAN_TDLS_TEARDOWN ||
225 action_code == WLAN_TDLS_DISCOVERY_REQUEST ||
226 action_code == WLAN_TDLS_DISCOVERY_RESPONSE)
227 return 0; /* No retries */
229 for (peer = sm->tdls; peer; peer = peer->next) {
230 if (os_memcmp(peer->addr, dest, ETH_ALEN) == 0)
235 wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
236 "retry " MACSTR, MAC2STR(dest));
240 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
242 peer->sm_tmr.count = TPK_RETRY_COUNT;
243 peer->sm_tmr.timer = TPK_TIMEOUT;
245 /* Copy message to resend on timeout */
246 os_memcpy(peer->sm_tmr.dest, dest, ETH_ALEN);
247 peer->sm_tmr.action_code = action_code;
248 peer->sm_tmr.dialog_token = dialog_token;
249 peer->sm_tmr.status_code = status_code;
250 peer->sm_tmr.buf_len = msg_len;
251 os_free(peer->sm_tmr.buf);
252 peer->sm_tmr.buf = os_malloc(msg_len);
253 if (peer->sm_tmr.buf == NULL)
255 os_memcpy(peer->sm_tmr.buf, msg, msg_len);
257 wpa_printf(MSG_DEBUG, "TDLS: Retry timeout registered "
258 "(action_code=%u)", action_code);
259 eloop_register_timeout(peer->sm_tmr.timer / 1000, 0,
260 wpa_tdls_tpk_retry_timeout, sm, peer);
265 static int wpa_tdls_do_teardown(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
270 if (sm->tdls_external_setup) {
271 ret = wpa_tdls_send_teardown(sm, peer->addr, reason_code);
273 /* disable the link after teardown was sent */
274 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
276 ret = wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
279 wpa_tdls_peer_free(sm, peer);
285 static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx)
288 struct wpa_sm *sm = eloop_ctx;
289 struct wpa_tdls_peer *peer = timeout_ctx;
291 if (peer->sm_tmr.count) {
292 peer->sm_tmr.count--;
293 peer->sm_tmr.timer = TPK_TIMEOUT;
295 wpa_printf(MSG_INFO, "TDLS: Retrying sending of message "
297 peer->sm_tmr.action_code);
299 if (peer->sm_tmr.buf == NULL) {
300 wpa_printf(MSG_INFO, "TDLS: No retry buffer available "
301 "for action_code=%u",
302 peer->sm_tmr.action_code);
303 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm,
308 /* resend TPK Handshake Message to Peer */
309 if (wpa_tdls_send_tpk_msg(sm, peer->sm_tmr.dest,
310 peer->sm_tmr.action_code,
311 peer->sm_tmr.dialog_token,
312 peer->sm_tmr.status_code,
314 peer->sm_tmr.buf_len)) {
315 wpa_printf(MSG_INFO, "TDLS: Failed to retry "
319 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
320 eloop_register_timeout(peer->sm_tmr.timer / 1000, 0,
321 wpa_tdls_tpk_retry_timeout, sm, peer);
323 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
325 wpa_printf(MSG_DEBUG, "TDLS: Sending Teardown Request");
326 wpa_tdls_do_teardown(sm, peer,
327 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
332 static void wpa_tdls_tpk_retry_timeout_cancel(struct wpa_sm *sm,
333 struct wpa_tdls_peer *peer,
336 if (action_code == peer->sm_tmr.action_code) {
337 wpa_printf(MSG_DEBUG, "TDLS: Retry timeout cancelled for "
338 "action_code=%u", action_code);
340 /* Cancel Timeout registered */
341 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
343 /* free all resources meant for retry */
344 os_free(peer->sm_tmr.buf);
345 peer->sm_tmr.buf = NULL;
347 peer->sm_tmr.count = 0;
348 peer->sm_tmr.timer = 0;
349 peer->sm_tmr.buf_len = 0;
350 peer->sm_tmr.action_code = 0xff;
352 wpa_printf(MSG_INFO, "TDLS: Error in cancelling retry timeout "
353 "(Unknown action_code=%u)", action_code);
358 static void wpa_tdls_generate_tpk(struct wpa_tdls_peer *peer,
359 const u8 *own_addr, const u8 *bssid)
361 u8 key_input[SHA256_MAC_LEN];
364 u8 data[3 * ETH_ALEN];
366 /* IEEE Std 802.11z-2010 8.5.9.1:
367 * TPK-Key-Input = SHA-256(min(SNonce, ANonce) || max(SNonce, ANonce))
369 len[0] = WPA_NONCE_LEN;
370 len[1] = WPA_NONCE_LEN;
371 if (os_memcmp(peer->inonce, peer->rnonce, WPA_NONCE_LEN) < 0) {
372 nonce[0] = peer->inonce;
373 nonce[1] = peer->rnonce;
375 nonce[0] = peer->rnonce;
376 nonce[1] = peer->inonce;
378 wpa_hexdump(MSG_DEBUG, "TDLS: min(Nonce)", nonce[0], WPA_NONCE_LEN);
379 wpa_hexdump(MSG_DEBUG, "TDLS: max(Nonce)", nonce[1], WPA_NONCE_LEN);
380 sha256_vector(2, nonce, len, key_input);
381 wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-Key-Input",
382 key_input, SHA256_MAC_LEN);
385 * TPK-Key-Data = KDF-N_KEY(TPK-Key-Input, "TDLS PMK",
386 * min(MAC_I, MAC_R) || max(MAC_I, MAC_R) || BSSID || N_KEY)
387 * TODO: is N_KEY really included in KDF Context and if so, in which
388 * presentation format (little endian 16-bit?) is it used? It gets
389 * added by the KDF anyway..
392 if (os_memcmp(own_addr, peer->addr, ETH_ALEN) < 0) {
393 os_memcpy(data, own_addr, ETH_ALEN);
394 os_memcpy(data + ETH_ALEN, peer->addr, ETH_ALEN);
396 os_memcpy(data, peer->addr, ETH_ALEN);
397 os_memcpy(data + ETH_ALEN, own_addr, ETH_ALEN);
399 os_memcpy(data + 2 * ETH_ALEN, bssid, ETH_ALEN);
400 wpa_hexdump(MSG_DEBUG, "TDLS: KDF Context", data, sizeof(data));
402 sha256_prf(key_input, SHA256_MAC_LEN, "TDLS PMK", data, sizeof(data),
403 (u8 *) &peer->tpk, sizeof(peer->tpk));
404 wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-KCK",
405 peer->tpk.kck, sizeof(peer->tpk.kck));
406 wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-TK",
407 peer->tpk.tk, sizeof(peer->tpk.tk));
413 * wpa_tdls_ftie_mic - Calculate TDLS FTIE MIC
415 * @lnkid: Pointer to the beginning of Link Identifier IE
416 * @rsnie: Pointer to the beginning of RSN IE used for handshake
417 * @timeoutie: Pointer to the beginning of Timeout IE used for handshake
418 * @ftie: Pointer to the beginning of FT IE
419 * @mic: Pointer for writing MIC
421 * Calculate MIC for TDLS frame.
423 static int wpa_tdls_ftie_mic(const u8 *kck, u8 trans_seq, const u8 *lnkid,
424 const u8 *rsnie, const u8 *timeoutie,
425 const u8 *ftie, u8 *mic)
428 struct wpa_tdls_ftie *_ftie;
429 const struct wpa_tdls_lnkid *_lnkid;
431 int len = 2 * ETH_ALEN + 1 + 2 + lnkid[1] + 2 + rsnie[1] +
432 2 + timeoutie[1] + 2 + ftie[1];
433 buf = os_zalloc(len);
435 wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation");
440 _lnkid = (const struct wpa_tdls_lnkid *) lnkid;
441 /* 1) TDLS initiator STA MAC address */
442 os_memcpy(pos, _lnkid->init_sta, ETH_ALEN);
444 /* 2) TDLS responder STA MAC address */
445 os_memcpy(pos, _lnkid->resp_sta, ETH_ALEN);
447 /* 3) Transaction Sequence number */
449 /* 4) Link Identifier IE */
450 os_memcpy(pos, lnkid, 2 + lnkid[1]);
453 os_memcpy(pos, rsnie, 2 + rsnie[1]);
455 /* 6) Timeout Interval IE */
456 os_memcpy(pos, timeoutie, 2 + timeoutie[1]);
457 pos += 2 + timeoutie[1];
458 /* 7) FTIE, with the MIC field of the FTIE set to 0 */
459 os_memcpy(pos, ftie, 2 + ftie[1]);
460 _ftie = (struct wpa_tdls_ftie *) pos;
461 os_memset(_ftie->mic, 0, TDLS_MIC_LEN);
464 wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf);
465 wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16);
466 ret = omac1_aes_128(kck, buf, pos - buf, mic);
468 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16);
474 * wpa_tdls_key_mic_teardown - Calculate TDLS FTIE MIC for Teardown frame
476 * @trans_seq: Transaction Sequence Number (4 - Teardown)
477 * @rcode: Reason code for Teardown
478 * @dtoken: Dialog Token used for that particular link
479 * @lnkid: Pointer to the beginning of Link Identifier IE
480 * @ftie: Pointer to the beginning of FT IE
481 * @mic: Pointer for writing MIC
483 * Calculate MIC for TDLS frame.
485 static int wpa_tdls_key_mic_teardown(const u8 *kck, u8 trans_seq, u16 rcode,
486 u8 dtoken, const u8 *lnkid,
487 const u8 *ftie, u8 *mic)
490 struct wpa_tdls_ftie *_ftie;
497 len = 2 + lnkid[1] + sizeof(rcode) + sizeof(dtoken) +
498 sizeof(trans_seq) + 2 + ftie[1];
500 buf = os_zalloc(len);
502 wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation");
507 /* 1) Link Identifier IE */
508 os_memcpy(pos, lnkid, 2 + lnkid[1]);
511 WPA_PUT_LE16(pos, rcode);
512 pos += sizeof(rcode);
513 /* 3) Dialog token */
515 /* 4) Transaction Sequence number */
517 /* 7) FTIE, with the MIC field of the FTIE set to 0 */
518 os_memcpy(pos, ftie, 2 + ftie[1]);
519 _ftie = (struct wpa_tdls_ftie *) pos;
520 os_memset(_ftie->mic, 0, TDLS_MIC_LEN);
523 wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf);
524 wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16);
525 ret = omac1_aes_128(kck, buf, pos - buf, mic);
527 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16);
532 static int wpa_supplicant_verify_tdls_mic(u8 trans_seq,
533 struct wpa_tdls_peer *peer,
534 const u8 *lnkid, const u8 *timeoutie,
535 const struct wpa_tdls_ftie *ftie)
540 wpa_tdls_ftie_mic(peer->tpk.kck, trans_seq, lnkid,
541 peer->rsnie_p, timeoutie, (u8 *) ftie,
543 if (os_memcmp(mic, ftie->mic, 16) != 0) {
544 wpa_printf(MSG_INFO, "TDLS: Invalid MIC in FTIE - "
546 wpa_hexdump(MSG_DEBUG, "TDLS: Received MIC",
548 wpa_hexdump(MSG_DEBUG, "TDLS: Calculated MIC",
553 wpa_printf(MSG_WARNING, "TDLS: Could not verify TDLS MIC, "
554 "TPK not set - dropping packet");
561 static int wpa_supplicant_verify_tdls_mic_teardown(
562 u8 trans_seq, u16 rcode, u8 dtoken, struct wpa_tdls_peer *peer,
563 const u8 *lnkid, const struct wpa_tdls_ftie *ftie)
568 wpa_tdls_key_mic_teardown(peer->tpk.kck, trans_seq, rcode,
569 dtoken, lnkid, (u8 *) ftie, mic);
570 if (os_memcmp(mic, ftie->mic, 16) != 0) {
571 wpa_printf(MSG_INFO, "TDLS: Invalid MIC in Teardown - "
576 wpa_printf(MSG_INFO, "TDLS: Could not verify TDLS Teardown "
577 "MIC, TPK not set - dropping packet");
584 static void wpa_tdls_tpk_timeout(void *eloop_ctx, void *timeout_ctx)
586 struct wpa_sm *sm = eloop_ctx;
587 struct wpa_tdls_peer *peer = timeout_ctx;
590 * On TPK lifetime expiration, we have an option of either tearing down
591 * the direct link or trying to re-initiate it. The selection of what
592 * to do is not strictly speaking controlled by our role in the expired
593 * link, but for now, use that to select whether to renew or tear down
597 if (peer->initiator) {
598 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
599 " - try to renew", MAC2STR(peer->addr));
600 wpa_tdls_start(sm, peer->addr);
602 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
603 " - tear down", MAC2STR(peer->addr));
604 wpa_tdls_do_teardown(sm, peer,
605 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
610 static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
612 wpa_printf(MSG_DEBUG, "TDLS: Clear state for peer " MACSTR,
613 MAC2STR(peer->addr));
614 eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
615 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
617 os_free(peer->sm_tmr.buf);
618 peer->sm_tmr.buf = NULL;
619 peer->rsnie_i_len = peer->rsnie_p_len = 0;
621 peer->tpk_set = peer->tpk_success = 0;
622 os_memset(&peer->tpk, 0, sizeof(peer->tpk));
623 os_memset(peer->inonce, 0, WPA_NONCE_LEN);
624 os_memset(peer->rnonce, 0, WPA_NONCE_LEN);
628 static void wpa_tdls_linkid(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
629 struct wpa_tdls_lnkid *lnkid)
631 lnkid->ie_type = WLAN_EID_LINK_ID;
632 lnkid->ie_len = 3 * ETH_ALEN;
633 os_memcpy(lnkid->bssid, sm->bssid, ETH_ALEN);
634 if (peer->initiator) {
635 os_memcpy(lnkid->init_sta, sm->own_addr, ETH_ALEN);
636 os_memcpy(lnkid->resp_sta, peer->addr, ETH_ALEN);
638 os_memcpy(lnkid->init_sta, peer->addr, ETH_ALEN);
639 os_memcpy(lnkid->resp_sta, sm->own_addr, ETH_ALEN);
644 int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
646 struct wpa_tdls_peer *peer;
647 struct wpa_tdls_ftie *ftie;
648 struct wpa_tdls_lnkid lnkid;
653 if (sm->tdls_disabled || !sm->tdls_supported)
656 /* Find the node and free from the list */
657 for (peer = sm->tdls; peer; peer = peer->next) {
658 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
663 wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
664 "Teardown " MACSTR, MAC2STR(addr));
668 dialog_token = peer->dtoken;
670 wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown for " MACSTR,
674 if (wpa_tdls_get_privacy(sm) && peer->tpk_set && peer->tpk_success) {
675 /* To add FTIE for Teardown request and compute MIC */
676 ielen += sizeof(*ftie);
677 #ifdef CONFIG_TDLS_TESTING
678 if (tdls_testing & TDLS_TESTING_LONG_FRAME)
680 #endif /* CONFIG_TDLS_TESTING */
683 rbuf = os_zalloc(ielen + 1);
688 if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success)
691 ftie = (struct wpa_tdls_ftie *) pos;
692 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
693 /* Using the recent nonce which should be for CONFIRM frame */
694 os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
695 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
696 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
697 pos = (u8 *) (ftie + 1);
698 #ifdef CONFIG_TDLS_TESTING
699 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
700 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
703 *pos++ = 255; /* FTIE subelem */
704 *pos++ = 168; /* FTIE subelem length */
706 #endif /* CONFIG_TDLS_TESTING */
707 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TDLS Teardown handshake",
708 (u8 *) ftie, sizeof(*ftie));
710 /* compute MIC before sending */
711 wpa_tdls_linkid(sm, peer, &lnkid);
712 wpa_tdls_key_mic_teardown(peer->tpk.kck, 4, reason_code,
713 dialog_token, (u8 *) &lnkid, (u8 *) ftie,
717 /* TODO: register for a Timeout handler, if Teardown is not received at
718 * the other end, then try again another time */
720 /* request driver to send Teardown using this FTIE */
721 wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_TEARDOWN, 0,
722 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, rbuf,
726 /* clear the Peerkey statemachine */
727 wpa_tdls_peer_free(sm, peer);
733 int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
735 struct wpa_tdls_peer *peer;
737 if (sm->tdls_disabled || !sm->tdls_supported)
740 for (peer = sm->tdls; peer; peer = peer->next) {
741 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
746 wpa_printf(MSG_DEBUG, "TDLS: Could not find peer " MACSTR
747 " for link Teardown", MAC2STR(addr));
751 if (!peer->tpk_success) {
752 wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR
753 " not connected - cannot Teardown link", MAC2STR(addr));
757 return wpa_tdls_do_teardown(sm, peer, reason_code);
761 void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr)
763 struct wpa_tdls_peer *peer;
765 for (peer = sm->tdls; peer; peer = peer->next) {
766 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
771 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, addr);
772 wpa_tdls_peer_free(sm, peer);
777 static int wpa_tdls_recv_teardown(struct wpa_sm *sm, const u8 *src_addr,
778 const u8 *buf, size_t len)
780 struct wpa_tdls_peer *peer = NULL;
781 struct wpa_tdls_ftie *ftie;
782 struct wpa_tdls_lnkid *lnkid;
783 struct wpa_eapol_ie_parse kde;
788 /* Find the node and free from the list */
789 for (peer = sm->tdls; peer; peer = peer->next) {
790 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
795 wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
796 "Teardown " MACSTR, MAC2STR(src_addr));
801 pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
803 reason_code = WPA_GET_LE16(pos);
806 wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown Request from " MACSTR
807 " (reason code %u)", MAC2STR(src_addr), reason_code);
809 ielen = len - (pos - buf); /* start of IE in buf */
810 if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) {
811 wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in Teardown");
815 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
816 wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TDLS "
820 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
822 if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success)
825 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
826 wpa_printf(MSG_INFO, "TDLS: No FTIE in TDLS Teardown");
830 ftie = (struct wpa_tdls_ftie *) kde.ftie;
832 /* Process MIC check to see if TDLS Teardown is right */
833 if (wpa_supplicant_verify_tdls_mic_teardown(4, reason_code,
835 (u8 *) lnkid, ftie) < 0) {
836 wpa_printf(MSG_DEBUG, "TDLS: MIC failure for TDLS "
837 "Teardown Request from " MACSTR, MAC2STR(src_addr));
843 * Request the driver to disable the direct link and clear associated
846 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
848 /* clear the Peerkey statemachine */
849 wpa_tdls_peer_free(sm, peer);
856 * wpa_tdls_send_error - To send suitable TDLS status response with
857 * appropriate status code mentioning reason for error/failure.
858 * @dst - MAC addr of Peer station
859 * @tdls_action - TDLS frame type for which error code is sent
860 * @status - status code mentioning reason
863 static int wpa_tdls_send_error(struct wpa_sm *sm, const u8 *dst,
864 u8 tdls_action, u8 dialog_token, u16 status)
866 wpa_printf(MSG_DEBUG, "TDLS: Sending error to " MACSTR
867 " (action=%u status=%u)",
868 MAC2STR(dst), tdls_action, status);
869 return wpa_tdls_tpk_send(sm, dst, tdls_action, dialog_token, status,
874 static struct wpa_tdls_peer *
875 wpa_tdls_add_peer(struct wpa_sm *sm, const u8 *addr)
877 struct wpa_tdls_peer *peer;
879 wpa_printf(MSG_INFO, "TDLS: Creating peer entry for " MACSTR,
882 peer = os_zalloc(sizeof(*peer));
886 os_memcpy(peer->addr, addr, ETH_ALEN);
887 peer->next = sm->tdls;
894 static int wpa_tdls_send_tpk_m1(struct wpa_sm *sm,
895 struct wpa_tdls_peer *peer)
898 struct wpa_tdls_timeoutie timeoutie;
900 struct wpa_tdls_ftie *ftie;
901 u8 *rbuf, *pos, *count_pos;
903 struct rsn_ie_hdr *hdr;
905 if (!wpa_tdls_get_privacy(sm)) {
906 wpa_printf(MSG_DEBUG, "TDLS: No security used on the link");
907 peer->rsnie_i_len = 0;
912 * TPK Handshake Message 1:
913 * FTIE: ANonce=0, SNonce=initiator nonce MIC=0, DataKDs=(RSNIE_I,
914 * Timeout Interval IE))
918 hdr = (struct rsn_ie_hdr *) peer->rsnie_i;
919 hdr->elem_id = WLAN_EID_RSN;
920 WPA_PUT_LE16(hdr->version, RSN_VERSION);
922 pos = (u8 *) (hdr + 1);
923 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
924 pos += RSN_SELECTOR_LEN;
931 * AES-CCMP is the default Encryption preferred for TDLS, so
932 * RSN IE is filled only with CCMP CIPHER
933 * Note: TKIP is not used to encrypt TDLS link.
935 * Regardless of the cipher used on the AP connection, select CCMP
938 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
939 pos += RSN_SELECTOR_LEN;
942 WPA_PUT_LE16(count_pos, count);
944 WPA_PUT_LE16(pos, 1);
946 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE);
947 pos += RSN_SELECTOR_LEN;
949 rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
950 rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2;
951 #ifdef CONFIG_TDLS_TESTING
952 if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) {
953 wpa_printf(MSG_DEBUG, "TDLS: Use alternative RSN IE for "
955 rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
957 #endif /* CONFIG_TDLS_TESTING */
958 WPA_PUT_LE16(pos, rsn_capab);
960 #ifdef CONFIG_TDLS_TESTING
961 if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) {
962 /* Number of PMKIDs */
966 #endif /* CONFIG_TDLS_TESTING */
968 hdr->len = (pos - peer->rsnie_i) - 2;
969 peer->rsnie_i_len = pos - peer->rsnie_i;
970 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake",
971 peer->rsnie_i, peer->rsnie_i_len);
975 if (wpa_tdls_get_privacy(sm))
976 buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
977 sizeof(struct wpa_tdls_timeoutie);
978 #ifdef CONFIG_TDLS_TESTING
979 if (wpa_tdls_get_privacy(sm) &&
980 (tdls_testing & TDLS_TESTING_LONG_FRAME))
982 if (tdls_testing & TDLS_TESTING_DIFF_BSSID)
983 buf_len += sizeof(struct wpa_tdls_lnkid);
984 #endif /* CONFIG_TDLS_TESTING */
985 rbuf = os_zalloc(buf_len + 1);
987 wpa_tdls_peer_free(sm, peer);
992 if (!wpa_tdls_get_privacy(sm))
995 /* Initiator RSN IE */
996 pos = wpa_add_ie(pos, peer->rsnie_i, peer->rsnie_i_len);
998 ftie = (struct wpa_tdls_ftie *) pos;
999 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
1000 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
1002 if (os_get_random(peer->inonce, WPA_NONCE_LEN)) {
1003 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1004 "TDLS: Failed to get random data for initiator Nonce");
1006 wpa_tdls_peer_free(sm, peer);
1009 wpa_hexdump(MSG_DEBUG, "TDLS: Initiator Nonce for TPK handshake",
1010 peer->inonce, WPA_NONCE_LEN);
1011 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
1013 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK Handshake M1",
1014 (u8 *) ftie, sizeof(struct wpa_tdls_ftie));
1016 pos = (u8 *) (ftie + 1);
1018 #ifdef CONFIG_TDLS_TESTING
1019 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
1020 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
1022 ftie->ie_len += 170;
1023 *pos++ = 255; /* FTIE subelem */
1024 *pos++ = 168; /* FTIE subelem length */
1027 #endif /* CONFIG_TDLS_TESTING */
1030 peer->lifetime = TPK_LIFETIME;
1031 #ifdef CONFIG_TDLS_TESTING
1032 if (tdls_testing & TDLS_TESTING_SHORT_LIFETIME) {
1033 wpa_printf(MSG_DEBUG, "TDLS: Testing - use short TPK "
1035 peer->lifetime = 301;
1037 if (tdls_testing & TDLS_TESTING_LONG_LIFETIME) {
1038 wpa_printf(MSG_DEBUG, "TDLS: Testing - use long TPK "
1040 peer->lifetime = 0xffffffff;
1042 #endif /* CONFIG_TDLS_TESTING */
1043 pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
1044 sizeof(timeoutie), peer->lifetime);
1045 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", peer->lifetime);
1049 #ifdef CONFIG_TDLS_TESTING
1050 if (tdls_testing & TDLS_TESTING_DIFF_BSSID) {
1051 wpa_printf(MSG_DEBUG, "TDLS: Testing - use incorrect BSSID in "
1053 struct wpa_tdls_lnkid *l = (struct wpa_tdls_lnkid *) pos;
1054 wpa_tdls_linkid(sm, peer, l);
1055 l->bssid[5] ^= 0x01;
1058 #endif /* CONFIG_TDLS_TESTING */
1060 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Request / TPK "
1061 "Handshake Message 1 (peer " MACSTR ")",
1062 MAC2STR(peer->addr));
1064 wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST, 1, 0,
1072 static int wpa_tdls_send_tpk_m2(struct wpa_sm *sm,
1073 const unsigned char *src_addr, u8 dtoken,
1074 struct wpa_tdls_lnkid *lnkid,
1075 const struct wpa_tdls_peer *peer)
1080 struct wpa_tdls_timeoutie timeoutie;
1081 struct wpa_tdls_ftie *ftie;
1084 if (wpa_tdls_get_privacy(sm)) {
1085 /* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce),
1087 buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
1088 sizeof(struct wpa_tdls_timeoutie);
1089 #ifdef CONFIG_TDLS_TESTING
1090 if (tdls_testing & TDLS_TESTING_LONG_FRAME)
1092 #endif /* CONFIG_TDLS_TESTING */
1095 rbuf = os_zalloc(buf_len + 1);
1100 if (!wpa_tdls_get_privacy(sm))
1104 pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len);
1106 ftie = (struct wpa_tdls_ftie *) pos;
1107 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
1108 /* TODO: ftie->mic_control to set 2-RESPONSE */
1109 os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
1110 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
1111 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
1112 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK M2",
1113 (u8 *) ftie, sizeof(*ftie));
1115 pos = (u8 *) (ftie + 1);
1117 #ifdef CONFIG_TDLS_TESTING
1118 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
1119 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
1121 ftie->ie_len += 170;
1122 *pos++ = 255; /* FTIE subelem */
1123 *pos++ = 168; /* FTIE subelem length */
1126 #endif /* CONFIG_TDLS_TESTING */
1129 lifetime = peer->lifetime;
1130 #ifdef CONFIG_TDLS_TESTING
1131 if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_RESP) {
1132 wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK "
1133 "lifetime in response");
1136 #endif /* CONFIG_TDLS_TESTING */
1137 pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
1138 sizeof(timeoutie), lifetime);
1139 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds from initiator",
1142 /* compute MIC before sending */
1143 wpa_tdls_ftie_mic(peer->tpk.kck, 2, (u8 *) lnkid, peer->rsnie_p,
1144 (u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
1147 wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken, 0,
1155 static int wpa_tdls_send_tpk_m3(struct wpa_sm *sm,
1156 const unsigned char *src_addr, u8 dtoken,
1157 struct wpa_tdls_lnkid *lnkid,
1158 const struct wpa_tdls_peer *peer)
1162 struct wpa_tdls_ftie *ftie;
1163 struct wpa_tdls_timeoutie timeoutie;
1167 if (wpa_tdls_get_privacy(sm)) {
1168 /* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce),
1170 buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
1171 sizeof(struct wpa_tdls_timeoutie);
1172 #ifdef CONFIG_TDLS_TESTING
1173 if (tdls_testing & TDLS_TESTING_LONG_FRAME)
1175 #endif /* CONFIG_TDLS_TESTING */
1178 rbuf = os_zalloc(buf_len + 1);
1183 if (!wpa_tdls_get_privacy(sm))
1187 pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len);
1189 ftie = (struct wpa_tdls_ftie *) pos;
1190 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
1191 /*TODO: ftie->mic_control to set 3-CONFIRM */
1192 os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
1193 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
1194 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
1196 pos = (u8 *) (ftie + 1);
1198 #ifdef CONFIG_TDLS_TESTING
1199 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
1200 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
1202 ftie->ie_len += 170;
1203 *pos++ = 255; /* FTIE subelem */
1204 *pos++ = 168; /* FTIE subelem length */
1207 #endif /* CONFIG_TDLS_TESTING */
1210 lifetime = peer->lifetime;
1211 #ifdef CONFIG_TDLS_TESTING
1212 if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_CONF) {
1213 wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK "
1214 "lifetime in confirm");
1217 #endif /* CONFIG_TDLS_TESTING */
1218 pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
1219 sizeof(timeoutie), lifetime);
1220 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds",
1223 /* compute MIC before sending */
1224 wpa_tdls_ftie_mic(peer->tpk.kck, 3, (u8 *) lnkid, peer->rsnie_p,
1225 (u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
1228 wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken, 0,
1236 static int wpa_tdls_send_discovery_response(struct wpa_sm *sm,
1237 struct wpa_tdls_peer *peer,
1240 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Discovery Response "
1241 "(peer " MACSTR ")", MAC2STR(peer->addr));
1243 return wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_DISCOVERY_RESPONSE,
1244 dialog_token, 0, NULL, 0);
1249 wpa_tdls_process_discovery_request(struct wpa_sm *sm, const u8 *addr,
1250 const u8 *buf, size_t len)
1252 struct wpa_eapol_ie_parse kde;
1253 const struct wpa_tdls_lnkid *lnkid;
1254 struct wpa_tdls_peer *peer;
1255 size_t min_req_len = sizeof(struct wpa_tdls_frame) +
1256 1 /* dialog token */ + sizeof(struct wpa_tdls_lnkid);
1259 wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from " MACSTR,
1262 if (len < min_req_len) {
1263 wpa_printf(MSG_DEBUG, "TDLS Discovery Request is too short: "
1268 dialog_token = buf[sizeof(struct wpa_tdls_frame)];
1270 if (wpa_supplicant_parse_ies(buf + sizeof(struct wpa_tdls_frame) + 1,
1271 len - (sizeof(struct wpa_tdls_frame) + 1),
1276 wpa_printf(MSG_DEBUG, "TDLS: Link ID not found in Discovery "
1281 lnkid = (const struct wpa_tdls_lnkid *) kde.lnkid;
1283 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
1284 wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from different "
1285 " BSS " MACSTR, MAC2STR(lnkid->bssid));
1289 peer = wpa_tdls_add_peer(sm, addr);
1293 return wpa_tdls_send_discovery_response(sm, peer, dialog_token);
1297 int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr)
1299 if (sm->tdls_disabled || !sm->tdls_supported)
1302 wpa_printf(MSG_DEBUG, "TDLS: Sending Discovery Request to peer "
1303 MACSTR, MAC2STR(addr));
1304 return wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_DISCOVERY_REQUEST,
1309 static int copy_supp_rates(const struct wpa_eapol_ie_parse *kde,
1310 struct wpa_tdls_peer *peer)
1312 if (!kde->supp_rates) {
1313 wpa_printf(MSG_DEBUG, "TDLS: No supported rates received");
1317 peer->supp_rates_len = kde->supp_rates_len - 2;
1318 if (peer->supp_rates_len > IEEE80211_MAX_SUPP_RATES)
1319 peer->supp_rates_len = IEEE80211_MAX_SUPP_RATES;
1320 os_memcpy(peer->supp_rates, kde->supp_rates + 2, peer->supp_rates_len);
1322 if (kde->ext_supp_rates) {
1323 int clen = kde->ext_supp_rates_len - 2;
1324 if (peer->supp_rates_len + clen > IEEE80211_MAX_SUPP_RATES)
1325 clen = IEEE80211_MAX_SUPP_RATES - peer->supp_rates_len;
1326 os_memcpy(peer->supp_rates + peer->supp_rates_len,
1327 kde->ext_supp_rates + 2, clen);
1328 peer->supp_rates_len += clen;
1335 static int wpa_tdls_process_tpk_m1(struct wpa_sm *sm, const u8 *src_addr,
1336 const u8 *buf, size_t len)
1338 struct wpa_tdls_peer *peer;
1339 struct wpa_eapol_ie_parse kde;
1340 struct wpa_ie_data ie;
1343 struct wpa_tdls_ftie *ftie = NULL;
1344 struct wpa_tdls_timeoutie *timeoutie;
1345 struct wpa_tdls_lnkid *lnkid;
1348 struct rsn_ie_hdr *hdr;
1355 u16 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
1356 int tdls_prohibited = sm->tdls_prohibited;
1357 int existing_peer = 0;
1363 cpos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
1365 /* driver had already verified the frame format */
1366 dtoken = *cpos++; /* dialog token */
1368 wpa_printf(MSG_INFO, "TDLS: Dialog Token in TPK M1 %d", dtoken);
1370 for (peer = sm->tdls; peer; peer = peer->next) {
1371 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0) {
1378 peer = wpa_tdls_add_peer(sm, src_addr);
1383 /* capability information */
1384 peer->capability = WPA_GET_LE16(cpos);
1387 ielen = len - (cpos - buf); /* start of IE in buf */
1388 if (wpa_supplicant_parse_ies(cpos, ielen, &kde) < 0) {
1389 wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M1");
1393 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
1394 wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
1398 wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M1",
1399 kde.lnkid, kde.lnkid_len);
1400 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
1401 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
1402 wpa_printf(MSG_INFO, "TDLS: TPK M1 from diff BSS");
1403 status = WLAN_STATUS_NOT_IN_SAME_BSS;
1407 wpa_printf(MSG_DEBUG, "TDLS: TPK M1 - TPK initiator " MACSTR,
1410 if (copy_supp_rates(&kde, peer) < 0)
1413 #ifdef CONFIG_TDLS_TESTING
1414 if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) {
1415 for (peer = sm->tdls; peer; peer = peer->next) {
1416 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
1420 peer = wpa_tdls_add_peer(sm, src_addr);
1424 wpa_printf(MSG_DEBUG, "TDLS: Testing concurrent initiation of "
1425 "TDLS setup - send own request");
1426 peer->initiator = 1;
1427 wpa_tdls_send_tpk_m1(sm, peer);
1430 if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
1432 wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
1434 tdls_prohibited = 0;
1436 #endif /* CONFIG_TDLS_TESTING */
1438 if (tdls_prohibited) {
1439 wpa_printf(MSG_INFO, "TDLS: TDLS prohibited in this BSS");
1440 status = WLAN_STATUS_REQUEST_DECLINED;
1444 if (!wpa_tdls_get_privacy(sm)) {
1446 wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M1 while "
1447 "security is disabled");
1448 status = WLAN_STATUS_SECURITY_DISABLED;
1454 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
1455 kde.rsn_ie == NULL) {
1456 wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M1");
1457 status = WLAN_STATUS_INVALID_PARAMETERS;
1461 if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) {
1462 wpa_printf(MSG_INFO, "TDLS: Too long Initiator RSN IE in "
1464 status = WLAN_STATUS_INVALID_RSNIE;
1468 if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
1469 wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M1");
1470 status = WLAN_STATUS_INVALID_RSNIE;
1474 cipher = ie.pairwise_cipher;
1475 if (cipher & WPA_CIPHER_CCMP) {
1476 wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
1477 cipher = WPA_CIPHER_CCMP;
1479 wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M1");
1480 status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1484 if ((ie.capabilities &
1485 (WPA_CAPABILITY_NO_PAIRWISE | WPA_CAPABILITY_PEERKEY_ENABLED)) !=
1486 WPA_CAPABILITY_PEERKEY_ENABLED) {
1487 wpa_printf(MSG_INFO, "TDLS: Invalid RSN Capabilities in "
1489 status = WLAN_STATUS_INVALID_RSN_IE_CAPAB;
1494 if (kde.key_lifetime == NULL) {
1495 wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M1");
1496 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
1499 timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
1500 lifetime = WPA_GET_LE32(timeoutie->value);
1501 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", lifetime);
1502 if (lifetime < 300) {
1503 wpa_printf(MSG_INFO, "TDLS: Too short TPK lifetime");
1504 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
1509 /* If found, use existing entry instead of adding a new one;
1510 * how to handle the case where both ends initiate at the
1512 if (existing_peer) {
1513 if (peer->tpk_success) {
1514 wpa_printf(MSG_DEBUG, "TDLS: TDLS Setup Request while "
1515 "direct link is enabled - tear down the "
1518 /* TODO: Disabling the link would be more proper
1519 * operation here, but it seems to trigger a race with
1520 * some drivers handling the new request frame. */
1521 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
1523 wpa_tdls_del_key(sm, peer);
1525 wpa_tdls_peer_free(sm, peer);
1529 * An entry is already present, so check if we already sent a
1530 * TDLS Setup Request. If so, compare MAC addresses and let the
1531 * STA with the lower MAC address continue as the initiator.
1532 * The other negotiation is terminated.
1534 if (peer->initiator) {
1535 if (os_memcmp(sm->own_addr, src_addr, ETH_ALEN) < 0) {
1536 wpa_printf(MSG_DEBUG, "TDLS: Discard request "
1537 "from peer with higher address "
1538 MACSTR, MAC2STR(src_addr));
1541 wpa_printf(MSG_DEBUG, "TDLS: Accept request "
1542 "from peer with lower address "
1543 MACSTR " (terminate previously "
1544 "initiated negotiation",
1546 wpa_tdls_peer_free(sm, peer);
1551 peer->initiator = 0; /* Need to check */
1552 peer->dtoken = dtoken;
1554 if (!wpa_tdls_get_privacy(sm)) {
1555 peer->rsnie_i_len = 0;
1556 peer->rsnie_p_len = 0;
1557 peer->cipher = WPA_CIPHER_NONE;
1558 goto skip_rsn_check;
1561 ftie = (struct wpa_tdls_ftie *) kde.ftie;
1562 os_memcpy(peer->inonce, ftie->Snonce, WPA_NONCE_LEN);
1563 os_memcpy(peer->rsnie_i, kde.rsn_ie, kde.rsn_ie_len);
1564 peer->rsnie_i_len = kde.rsn_ie_len;
1565 peer->cipher = cipher;
1567 if (os_get_random(peer->rnonce, WPA_NONCE_LEN)) {
1568 wpa_msg(sm->ctx->ctx, MSG_WARNING,
1569 "TDLS: Failed to get random data for responder nonce");
1570 wpa_tdls_peer_free(sm, peer);
1575 /* get version info from RSNIE received from Peer */
1576 hdr = (struct rsn_ie_hdr *) kde.rsn_ie;
1577 rsn_ver = WPA_GET_LE16(hdr->version);
1579 /* use min(peer's version, out version) */
1580 if (rsn_ver > RSN_VERSION)
1581 rsn_ver = RSN_VERSION;
1583 hdr = (struct rsn_ie_hdr *) peer->rsnie_p;
1585 hdr->elem_id = WLAN_EID_RSN;
1586 WPA_PUT_LE16(hdr->version, rsn_ver);
1587 pos = (u8 *) (hdr + 1);
1589 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
1590 pos += RSN_SELECTOR_LEN;
1591 /* Include only the selected cipher in pairwise cipher suite */
1592 WPA_PUT_LE16(pos, 1);
1594 if (cipher == WPA_CIPHER_CCMP)
1595 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1596 pos += RSN_SELECTOR_LEN;
1598 WPA_PUT_LE16(pos, 1);
1600 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE);
1601 pos += RSN_SELECTOR_LEN;
1603 rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
1604 rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2;
1605 WPA_PUT_LE16(pos, rsn_capab);
1608 hdr->len = (pos - peer->rsnie_p) - 2;
1609 peer->rsnie_p_len = pos - peer->rsnie_p;
1612 /* temp fix: validation of RSNIE later */
1613 os_memcpy(peer->rsnie_p, peer->rsnie_i, peer->rsnie_i_len);
1614 peer->rsnie_p_len = peer->rsnie_i_len;
1616 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake",
1617 peer->rsnie_p, peer->rsnie_p_len);
1619 peer->lifetime = lifetime;
1621 wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
1624 /* add the peer to the driver as a "setup in progress" peer */
1625 wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, NULL, 0);
1627 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Response / TPK M2");
1628 if (wpa_tdls_send_tpk_m2(sm, src_addr, dtoken, lnkid, peer) < 0) {
1629 wpa_tdls_disable_link(sm, peer->addr);
1636 wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken,
1642 static void wpa_tdls_enable_link(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
1644 peer->tpk_success = 1;
1645 eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
1646 if (wpa_tdls_get_privacy(sm)) {
1647 u32 lifetime = peer->lifetime;
1649 * Start the initiator process a bit earlier to avoid race
1650 * condition with the responder sending teardown request.
1652 if (lifetime > 3 && peer->initiator)
1654 eloop_register_timeout(lifetime, 0, wpa_tdls_tpk_timeout,
1656 #ifdef CONFIG_TDLS_TESTING
1657 if (tdls_testing & TDLS_TESTING_NO_TPK_EXPIRATION) {
1658 wpa_printf(MSG_DEBUG, "TDLS: Testing - disable TPK "
1660 eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
1662 #endif /* CONFIG_TDLS_TESTING */
1665 /* add supported rates and capabilities to the TDLS peer */
1666 wpa_sm_tdls_peer_addset(sm, peer->addr, 0, peer->capability,
1667 peer->supp_rates, peer->supp_rates_len);
1669 wpa_sm_tdls_oper(sm, TDLS_ENABLE_LINK, peer->addr);
1673 static int wpa_tdls_process_tpk_m2(struct wpa_sm *sm, const u8 *src_addr,
1674 const u8 *buf, size_t len)
1676 struct wpa_tdls_peer *peer;
1677 struct wpa_eapol_ie_parse kde;
1678 struct wpa_ie_data ie;
1680 struct wpa_tdls_ftie *ftie;
1681 struct wpa_tdls_timeoutie *timeoutie;
1682 struct wpa_tdls_lnkid *lnkid;
1689 wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Response / TPK M2 "
1690 "(Peer " MACSTR ")", MAC2STR(src_addr));
1691 for (peer = sm->tdls; peer; peer = peer->next) {
1692 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
1696 wpa_printf(MSG_INFO, "TDLS: No matching peer found for "
1697 "TPK M2: " MACSTR, MAC2STR(src_addr));
1700 wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_REQUEST);
1702 if (len < 3 + 2 + 1)
1705 pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
1706 status = WPA_GET_LE16(pos);
1707 pos += 2 /* status code */;
1709 if (status != WLAN_STATUS_SUCCESS) {
1710 wpa_printf(MSG_INFO, "TDLS: Status code in TPK M2: %u",
1715 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
1717 /* TODO: need to verify dialog token matches here or in kernel */
1718 dtoken = *pos++; /* dialog token */
1720 wpa_printf(MSG_DEBUG, "TDLS: Dialog Token in TPK M2 %d", dtoken);
1722 if (len < 3 + 2 + 1 + 2)
1725 /* capability information */
1726 peer->capability = WPA_GET_LE16(pos);
1729 ielen = len - (pos - buf); /* start of IE in buf */
1730 if (wpa_supplicant_parse_ies(pos, ielen, &kde) < 0) {
1731 wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M2");
1735 #ifdef CONFIG_TDLS_TESTING
1736 if (tdls_testing & TDLS_TESTING_DECLINE_RESP) {
1737 wpa_printf(MSG_DEBUG, "TDLS: Testing - decline response");
1738 status = WLAN_STATUS_REQUEST_DECLINED;
1741 #endif /* CONFIG_TDLS_TESTING */
1743 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
1744 wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
1748 wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M2",
1749 kde.lnkid, kde.lnkid_len);
1750 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
1752 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
1753 wpa_printf(MSG_INFO, "TDLS: TPK M2 from different BSS");
1754 status = WLAN_STATUS_NOT_IN_SAME_BSS;
1758 if (copy_supp_rates(&kde, peer) < 0)
1761 if (!wpa_tdls_get_privacy(sm)) {
1762 peer->rsnie_p_len = 0;
1763 peer->cipher = WPA_CIPHER_NONE;
1767 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
1768 kde.rsn_ie == NULL) {
1769 wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M2");
1770 status = WLAN_STATUS_INVALID_PARAMETERS;
1773 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
1774 kde.rsn_ie, kde.rsn_ie_len);
1777 * FIX: bitwise comparison of RSN IE is not the correct way of
1778 * validation this. It can be different, but certain fields must
1779 * match. Since we list only a single pairwise cipher in TPK M1, the
1780 * memcmp is likely to work in most cases, though.
1782 if (kde.rsn_ie_len != peer->rsnie_i_len ||
1783 os_memcmp(peer->rsnie_i, kde.rsn_ie, peer->rsnie_i_len) != 0) {
1784 wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M2 does "
1785 "not match with RSN IE used in TPK M1");
1786 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Sent in TPK M1",
1787 peer->rsnie_i, peer->rsnie_i_len);
1788 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
1789 kde.rsn_ie, kde.rsn_ie_len);
1790 status = WLAN_STATUS_INVALID_RSNIE;
1794 if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
1795 wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M2");
1796 status = WLAN_STATUS_INVALID_RSNIE;
1800 cipher = ie.pairwise_cipher;
1801 if (cipher == WPA_CIPHER_CCMP) {
1802 wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
1803 cipher = WPA_CIPHER_CCMP;
1805 wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M2");
1806 status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1810 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M2",
1811 kde.ftie, sizeof(*ftie));
1812 ftie = (struct wpa_tdls_ftie *) kde.ftie;
1814 if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
1815 wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M2 does "
1816 "not match with FTIE SNonce used in TPK M1");
1817 /* Silently discard the frame */
1821 /* Responder Nonce and RSN IE */
1822 os_memcpy(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN);
1823 os_memcpy(peer->rsnie_p, kde.rsn_ie, kde.rsn_ie_len);
1824 peer->rsnie_p_len = kde.rsn_ie_len;
1825 peer->cipher = cipher;
1828 if (kde.key_lifetime == NULL) {
1829 wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M2");
1830 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
1833 timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
1834 lifetime = WPA_GET_LE32(timeoutie->value);
1835 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M2",
1837 if (lifetime != peer->lifetime) {
1838 wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
1839 "TPK M2 (expected %u)", lifetime, peer->lifetime);
1840 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
1844 wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
1846 /* Process MIC check to see if TPK M2 is right */
1847 if (wpa_supplicant_verify_tdls_mic(2, peer, (u8 *) lnkid,
1848 (u8 *) timeoutie, ftie) < 0) {
1849 /* Discard the frame */
1850 wpa_tdls_del_key(sm, peer);
1851 wpa_tdls_peer_free(sm, peer);
1855 wpa_tdls_set_key(sm, peer);
1858 peer->dtoken = dtoken;
1860 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Confirm / "
1861 "TPK Handshake Message 3");
1862 wpa_tdls_send_tpk_m3(sm, src_addr, dtoken, lnkid, peer);
1864 wpa_tdls_enable_link(sm, peer);
1869 wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken,
1875 static int wpa_tdls_process_tpk_m3(struct wpa_sm *sm, const u8 *src_addr,
1876 const u8 *buf, size_t len)
1878 struct wpa_tdls_peer *peer;
1879 struct wpa_eapol_ie_parse kde;
1880 struct wpa_tdls_ftie *ftie;
1881 struct wpa_tdls_timeoutie *timeoutie;
1882 struct wpa_tdls_lnkid *lnkid;
1888 wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Confirm / TPK M3 "
1889 "(Peer " MACSTR ")", MAC2STR(src_addr));
1890 for (peer = sm->tdls; peer; peer = peer->next) {
1891 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
1895 wpa_printf(MSG_INFO, "TDLS: No matching peer found for "
1896 "TPK M3: " MACSTR, MAC2STR(src_addr));
1899 wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_RESPONSE);
1904 pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
1906 status = WPA_GET_LE16(pos);
1909 wpa_printf(MSG_INFO, "TDLS: Status code in TPK M3: %u",
1913 pos += 2 /* status code */ + 1 /* dialog token */;
1915 ielen = len - (pos - buf); /* start of IE in buf */
1916 if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) {
1917 wpa_printf(MSG_INFO, "TDLS: Failed to parse KDEs in TPK M3");
1921 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
1922 wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TPK M3");
1925 wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M3",
1926 (u8 *) kde.lnkid, kde.lnkid_len);
1927 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
1929 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
1930 wpa_printf(MSG_INFO, "TDLS: TPK M3 from diff BSS");
1934 if (!wpa_tdls_get_privacy(sm))
1937 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
1938 wpa_printf(MSG_INFO, "TDLS: No FTIE in TPK M3");
1941 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M3",
1942 kde.ftie, sizeof(*ftie));
1943 ftie = (struct wpa_tdls_ftie *) kde.ftie;
1945 if (kde.rsn_ie == NULL) {
1946 wpa_printf(MSG_INFO, "TDLS: No RSN IE in TPK M3");
1949 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M3",
1950 kde.rsn_ie, kde.rsn_ie_len);
1951 if (kde.rsn_ie_len != peer->rsnie_p_len ||
1952 os_memcmp(kde.rsn_ie, peer->rsnie_p, peer->rsnie_p_len) != 0) {
1953 wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M3 does not match "
1954 "with the one sent in TPK M2");
1958 if (!os_memcmp(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN) == 0) {
1959 wpa_printf(MSG_INFO, "TDLS: FTIE ANonce in TPK M3 does "
1960 "not match with FTIE ANonce used in TPK M2");
1964 if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
1965 wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M3 does not "
1966 "match with FTIE SNonce used in TPK M1");
1970 if (kde.key_lifetime == NULL) {
1971 wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M3");
1974 timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
1975 wpa_hexdump(MSG_DEBUG, "TDLS: Timeout IE Received from TPK M3",
1976 (u8 *) timeoutie, sizeof(*timeoutie));
1977 lifetime = WPA_GET_LE32(timeoutie->value);
1978 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M3",
1980 if (lifetime != peer->lifetime) {
1981 wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
1982 "TPK M3 (expected %u)", lifetime, peer->lifetime);
1986 if (wpa_supplicant_verify_tdls_mic(3, peer, (u8 *) lnkid,
1987 (u8 *) timeoutie, ftie) < 0) {
1988 wpa_tdls_del_key(sm, peer);
1989 wpa_tdls_peer_free(sm, peer);
1993 if (wpa_tdls_set_key(sm, peer) < 0)
1997 wpa_tdls_enable_link(sm, peer);
2003 static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs)
2005 struct wpa_tdls_timeoutie *lifetime = (struct wpa_tdls_timeoutie *) ie;
2007 os_memset(lifetime, 0, ie_len);
2008 lifetime->ie_type = WLAN_EID_TIMEOUT_INTERVAL;
2009 lifetime->ie_len = sizeof(struct wpa_tdls_timeoutie) - 2;
2010 lifetime->interval_type = WLAN_TIMEOUT_KEY_LIFETIME;
2011 WPA_PUT_LE32(lifetime->value, tsecs);
2012 os_memcpy(pos, ie, ie_len);
2013 return pos + ie_len;
2018 * wpa_tdls_start - Initiate TDLS handshake (send TPK Handshake Message 1)
2019 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2020 * @peer: MAC address of the peer STA
2021 * Returns: 0 on success, or -1 on failure
2023 * Send TPK Handshake Message 1 info to driver to start TDLS
2024 * handshake with the peer.
2026 int wpa_tdls_start(struct wpa_sm *sm, const u8 *addr)
2028 struct wpa_tdls_peer *peer;
2029 int tdls_prohibited = sm->tdls_prohibited;
2031 if (sm->tdls_disabled || !sm->tdls_supported)
2034 #ifdef CONFIG_TDLS_TESTING
2035 if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
2037 wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
2039 tdls_prohibited = 0;
2041 #endif /* CONFIG_TDLS_TESTING */
2043 if (tdls_prohibited) {
2044 wpa_printf(MSG_DEBUG, "TDLS: TDLS is prohibited in this BSS - "
2045 "reject request to start setup");
2049 /* Find existing entry and if found, use that instead of adding
2051 for (peer = sm->tdls; peer; peer = peer->next) {
2052 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
2057 peer = wpa_tdls_add_peer(sm, addr);
2062 peer->initiator = 1;
2064 /* add the peer to the driver as a "setup in progress" peer */
2065 wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, NULL, 0);
2067 if (wpa_tdls_send_tpk_m1(sm, peer) < 0) {
2068 wpa_tdls_disable_link(sm, peer->addr);
2076 int wpa_tdls_reneg(struct wpa_sm *sm, const u8 *addr)
2078 struct wpa_tdls_peer *peer;
2080 if (sm->tdls_disabled || !sm->tdls_supported)
2083 for (peer = sm->tdls; peer; peer = peer->next) {
2084 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
2088 if (peer == NULL || !peer->tpk_success)
2091 return wpa_tdls_start(sm, addr);
2096 * wpa_supplicant_rx_tdls - Receive TDLS data frame
2098 * This function is called to receive TDLS (ethertype = 0x890d) data frames.
2100 static void wpa_supplicant_rx_tdls(void *ctx, const u8 *src_addr,
2101 const u8 *buf, size_t len)
2103 struct wpa_sm *sm = ctx;
2104 struct wpa_tdls_frame *tf;
2106 wpa_hexdump(MSG_DEBUG, "TDLS: Received Data frame encapsulation",
2109 if (sm->tdls_disabled || !sm->tdls_supported) {
2110 wpa_printf(MSG_DEBUG, "TDLS: Discard message - TDLS disabled "
2111 "or unsupported by driver");
2115 if (os_memcmp(src_addr, sm->own_addr, ETH_ALEN) == 0) {
2116 wpa_printf(MSG_DEBUG, "TDLS: Discard copy of own message");
2120 if (len < sizeof(*tf)) {
2121 wpa_printf(MSG_INFO, "TDLS: Drop too short frame");
2125 /* Check to make sure its a valid encapsulated TDLS frame */
2126 tf = (struct wpa_tdls_frame *) buf;
2127 if (tf->payloadtype != 2 /* TDLS_RFTYPE */ ||
2128 tf->category != WLAN_ACTION_TDLS) {
2129 wpa_printf(MSG_INFO, "TDLS: Invalid frame - payloadtype=%u "
2130 "category=%u action=%u",
2131 tf->payloadtype, tf->category, tf->action);
2135 switch (tf->action) {
2136 case WLAN_TDLS_SETUP_REQUEST:
2137 wpa_tdls_process_tpk_m1(sm, src_addr, buf, len);
2139 case WLAN_TDLS_SETUP_RESPONSE:
2140 wpa_tdls_process_tpk_m2(sm, src_addr, buf, len);
2142 case WLAN_TDLS_SETUP_CONFIRM:
2143 wpa_tdls_process_tpk_m3(sm, src_addr, buf, len);
2145 case WLAN_TDLS_TEARDOWN:
2146 wpa_tdls_recv_teardown(sm, src_addr, buf, len);
2148 case WLAN_TDLS_DISCOVERY_REQUEST:
2149 wpa_tdls_process_discovery_request(sm, src_addr, buf, len);
2152 /* Kernel code will process remaining frames */
2153 wpa_printf(MSG_DEBUG, "TDLS: Ignore TDLS frame action code %u",
2161 * wpa_tdls_init - Initialize driver interface parameters for TDLS
2162 * @wpa_s: Pointer to wpa_supplicant data
2163 * Returns: 0 on success, -1 on failure
2165 * This function is called to initialize driver interface parameters for TDLS.
2166 * wpa_drv_init() must have been called before this function to initialize the
2169 int wpa_tdls_init(struct wpa_sm *sm)
2174 sm->l2_tdls = l2_packet_init(sm->ifname, sm->own_addr,
2175 ETH_P_80211_ENCAP, wpa_supplicant_rx_tdls,
2177 if (sm->l2_tdls == NULL) {
2178 wpa_printf(MSG_ERROR, "TDLS: Failed to open l2_packet "
2184 * Drivers that support TDLS but don't implement the get_capa callback
2185 * are assumed to perform everything internally
2187 if (wpa_sm_tdls_get_capa(sm, &sm->tdls_supported,
2188 &sm->tdls_external_setup) < 0) {
2189 sm->tdls_supported = 1;
2190 sm->tdls_external_setup = 0;
2193 wpa_printf(MSG_DEBUG, "TDLS: TDLS operation%s supported by "
2194 "driver", sm->tdls_supported ? "" : " not");
2195 wpa_printf(MSG_DEBUG, "TDLS: Driver uses %s link setup",
2196 sm->tdls_external_setup ? "external" : "internal");
2202 static void wpa_tdls_remove_peers(struct wpa_sm *sm)
2204 struct wpa_tdls_peer *peer, *tmp;
2212 res = wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
2213 wpa_printf(MSG_DEBUG, "TDLS: Remove peer " MACSTR " (res=%d)",
2214 MAC2STR(peer->addr), res);
2215 wpa_tdls_peer_free(sm, peer);
2223 * wpa_tdls_deinit - Deinitialize driver interface parameters for TDLS
2225 * This function is called to recover driver interface parameters for TDLS
2226 * and frees resources allocated for it.
2228 void wpa_tdls_deinit(struct wpa_sm *sm)
2234 l2_packet_deinit(sm->l2_tdls);
2237 wpa_tdls_remove_peers(sm);
2241 void wpa_tdls_assoc(struct wpa_sm *sm)
2243 wpa_printf(MSG_DEBUG, "TDLS: Remove peers on association");
2244 wpa_tdls_remove_peers(sm);
2248 void wpa_tdls_disassoc(struct wpa_sm *sm)
2250 wpa_printf(MSG_DEBUG, "TDLS: Remove peers on disassociation");
2251 wpa_tdls_remove_peers(sm);
2255 static int wpa_tdls_prohibited(const u8 *ies, size_t len)
2257 struct wpa_eapol_ie_parse elems;
2262 if (wpa_supplicant_parse_ies(ies, len, &elems) < 0)
2265 if (elems.ext_capab == NULL || elems.ext_capab_len < 2 + 5)
2268 /* bit 38 - TDLS Prohibited */
2269 return !!(elems.ext_capab[2 + 4] & 0x40);
2273 void wpa_tdls_ap_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
2275 sm->tdls_prohibited = wpa_tdls_prohibited(ies, len);
2276 wpa_printf(MSG_DEBUG, "TDLS: TDLS is %s in the target BSS",
2277 sm->tdls_prohibited ? "prohibited" : "allowed");
2281 void wpa_tdls_assoc_resp_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
2283 if (!sm->tdls_prohibited && wpa_tdls_prohibited(ies, len)) {
2284 wpa_printf(MSG_DEBUG, "TDLS: TDLS prohibited based on "
2285 "(Re)Association Response IEs");
2286 sm->tdls_prohibited = 1;
2291 void wpa_tdls_enable(struct wpa_sm *sm, int enabled)
2293 wpa_printf(MSG_DEBUG, "TDLS: %s", enabled ? "enabled" : "disabled");
2294 sm->tdls_disabled = !enabled;
2298 int wpa_tdls_is_external_setup(struct wpa_sm *sm)
2300 return sm->tdls_external_setup;