2 * wpa_supplicant - TDLS
3 * Copyright (c) 2010-2011, Atheros Communications
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #include "utils/includes.h"
11 #include "utils/common.h"
12 #include "utils/eloop.h"
14 #include "common/ieee802_11_defs.h"
15 #include "crypto/sha256.h"
16 #include "crypto/crypto.h"
17 #include "crypto/aes_wrap.h"
18 #include "rsn_supp/wpa.h"
19 #include "rsn_supp/wpa_ie.h"
20 #include "rsn_supp/wpa_i.h"
21 #include "drivers/driver.h"
22 #include "l2_packet/l2_packet.h"
24 #ifdef CONFIG_TDLS_TESTING
25 #define TDLS_TESTING_LONG_FRAME BIT(0)
26 #define TDLS_TESTING_ALT_RSN_IE BIT(1)
27 #define TDLS_TESTING_DIFF_BSSID BIT(2)
28 #define TDLS_TESTING_SHORT_LIFETIME BIT(3)
29 #define TDLS_TESTING_WRONG_LIFETIME_RESP BIT(4)
30 #define TDLS_TESTING_WRONG_LIFETIME_CONF BIT(5)
31 #define TDLS_TESTING_LONG_LIFETIME BIT(6)
32 #define TDLS_TESTING_CONCURRENT_INIT BIT(7)
33 #define TDLS_TESTING_NO_TPK_EXPIRATION BIT(8)
34 #define TDLS_TESTING_DECLINE_RESP BIT(9)
35 #define TDLS_TESTING_IGNORE_AP_PROHIBIT BIT(10)
36 unsigned int tdls_testing = 0;
37 #endif /* CONFIG_TDLS_TESTING */
39 #define TPK_LIFETIME 43200 /* 12 hours */
40 #define TPK_M1_RETRY_COUNT 3
41 #define TPK_M1_TIMEOUT 5000 /* in milliseconds */
42 #define TPK_M2_RETRY_COUNT 10
43 #define TPK_M2_TIMEOUT 500 /* in milliseconds */
45 #define TDLS_MIC_LEN 16
47 #define TDLS_TIMEOUT_LEN 4
49 struct wpa_tdls_ftie {
50 u8 ie_type; /* FTIE */
54 u8 Anonce[WPA_NONCE_LEN]; /* Responder Nonce in TDLS */
55 u8 Snonce[WPA_NONCE_LEN]; /* Initiator Nonce in TDLS */
56 /* followed by optional elements */
59 struct wpa_tdls_timeoutie {
60 u8 ie_type; /* Timeout IE */
63 u8 value[TDLS_TIMEOUT_LEN];
66 struct wpa_tdls_lnkid {
67 u8 ie_type; /* Link Identifier IE */
70 u8 init_sta[ETH_ALEN];
71 u8 resp_sta[ETH_ALEN];
74 /* TDLS frame headers as per IEEE Std 802.11z-2010 */
75 struct wpa_tdls_frame {
76 u8 payloadtype; /* IEEE80211_TDLS_RFTYPE */
77 u8 category; /* Category */
78 u8 action; /* Action (enum tdls_frame_type) */
81 static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs);
82 static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx);
83 static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer);
86 #define TDLS_MAX_IE_LEN 80
87 #define IEEE80211_MAX_SUPP_RATES 32
89 struct wpa_tdls_peer {
90 struct wpa_tdls_peer *next;
91 unsigned int reconfig_key:1;
92 int initiator; /* whether this end was initiator for TDLS setup */
93 u8 addr[ETH_ALEN]; /* other end MAC address */
94 u8 inonce[WPA_NONCE_LEN]; /* Initiator Nonce */
95 u8 rnonce[WPA_NONCE_LEN]; /* Responder Nonce */
96 u8 rsnie_i[TDLS_MAX_IE_LEN]; /* Initiator RSN IE */
98 u8 rsnie_p[TDLS_MAX_IE_LEN]; /* Peer RSN IE */
101 int cipher; /* Selected cipher (WPA_CIPHER_*) */
105 u8 kck[16]; /* TPK-KCK */
106 u8 tk[16]; /* TPK-TK; assuming only CCMP will be used */
113 int count; /* Retry Count */
114 int timer; /* Timeout in milliseconds */
115 u8 action_code; /* TDLS frame type */
118 int buf_len; /* length of TPK message for retransmission */
119 u8 *buf; /* buffer for TPK message */
124 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
125 size_t supp_rates_len;
127 struct ieee80211_ht_capabilities *ht_capabilities;
128 struct ieee80211_vht_capabilities *vht_capabilities;
135 size_t ext_capab_len;
139 static int wpa_tdls_get_privacy(struct wpa_sm *sm)
142 * Get info needed from supplicant to check if the current BSS supports
143 * security. Other than OPEN mode, rest are considered secured
144 * WEP/WPA/WPA2 hence TDLS frames are processed for TPK handshake.
146 return sm->pairwise_cipher != WPA_CIPHER_NONE;
150 static u8 * wpa_add_ie(u8 *pos, const u8 *ie, size_t ie_len)
152 os_memcpy(pos, ie, ie_len);
157 static int wpa_tdls_del_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
159 if (wpa_sm_set_key(sm, WPA_ALG_NONE, peer->addr,
160 0, 0, NULL, 0, NULL, 0) < 0) {
161 wpa_printf(MSG_WARNING, "TDLS: Failed to delete TPK-TK from "
170 static int wpa_tdls_set_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
176 os_memset(rsc, 0, 6);
178 switch (peer->cipher) {
179 case WPA_CIPHER_CCMP:
183 case WPA_CIPHER_NONE:
184 wpa_printf(MSG_DEBUG, "TDLS: Pairwise Cipher Suite: "
185 "NONE - do not use pairwise keys");
188 wpa_printf(MSG_WARNING, "TDLS: Unsupported pairwise cipher %d",
189 sm->pairwise_cipher);
193 if (wpa_sm_set_key(sm, alg, peer->addr, -1, 1,
194 rsc, sizeof(rsc), peer->tpk.tk, key_len) < 0) {
195 wpa_printf(MSG_WARNING, "TDLS: Failed to set TPK to the "
203 static int wpa_tdls_send_tpk_msg(struct wpa_sm *sm, const u8 *dst,
204 u8 action_code, u8 dialog_token,
205 u16 status_code, const u8 *buf, size_t len)
207 return wpa_sm_send_tdls_mgmt(sm, dst, action_code, dialog_token,
208 status_code, buf, len);
212 static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
213 u8 dialog_token, u16 status_code,
214 const u8 *msg, size_t msg_len)
216 struct wpa_tdls_peer *peer;
218 wpa_printf(MSG_DEBUG, "TDLS: TPK send dest=" MACSTR " action_code=%u "
219 "dialog_token=%u status_code=%u msg_len=%u",
220 MAC2STR(dest), action_code, dialog_token, status_code,
221 (unsigned int) msg_len);
223 if (wpa_tdls_send_tpk_msg(sm, dest, action_code, dialog_token,
224 status_code, msg, msg_len)) {
225 wpa_printf(MSG_INFO, "TDLS: Failed to send message "
226 "(action_code=%u)", action_code);
230 if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
231 action_code == WLAN_TDLS_TEARDOWN ||
232 action_code == WLAN_TDLS_DISCOVERY_REQUEST ||
233 action_code == WLAN_TDLS_DISCOVERY_RESPONSE)
234 return 0; /* No retries */
236 for (peer = sm->tdls; peer; peer = peer->next) {
237 if (os_memcmp(peer->addr, dest, ETH_ALEN) == 0)
242 wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
243 "retry " MACSTR, MAC2STR(dest));
247 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
249 if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
250 peer->sm_tmr.count = TPK_M2_RETRY_COUNT;
251 peer->sm_tmr.timer = TPK_M2_TIMEOUT;
253 peer->sm_tmr.count = TPK_M1_RETRY_COUNT;
254 peer->sm_tmr.timer = TPK_M1_TIMEOUT;
257 /* Copy message to resend on timeout */
258 os_memcpy(peer->sm_tmr.dest, dest, ETH_ALEN);
259 peer->sm_tmr.action_code = action_code;
260 peer->sm_tmr.dialog_token = dialog_token;
261 peer->sm_tmr.status_code = status_code;
262 peer->sm_tmr.buf_len = msg_len;
263 os_free(peer->sm_tmr.buf);
264 peer->sm_tmr.buf = os_malloc(msg_len);
265 if (peer->sm_tmr.buf == NULL)
267 os_memcpy(peer->sm_tmr.buf, msg, msg_len);
269 wpa_printf(MSG_DEBUG, "TDLS: Retry timeout registered "
270 "(action_code=%u)", action_code);
271 eloop_register_timeout(peer->sm_tmr.timer / 1000,
272 (peer->sm_tmr.timer % 1000) * 1000,
273 wpa_tdls_tpk_retry_timeout, sm, peer);
278 static int wpa_tdls_do_teardown(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
279 u16 reason_code, int free_peer)
283 if (sm->tdls_external_setup) {
284 ret = wpa_tdls_send_teardown(sm, peer->addr, reason_code);
286 /* disable the link after teardown was sent */
287 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
289 ret = wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
292 if (sm->tdls_external_setup || free_peer)
293 wpa_tdls_peer_free(sm, peer);
299 static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx)
302 struct wpa_sm *sm = eloop_ctx;
303 struct wpa_tdls_peer *peer = timeout_ctx;
305 if (peer->sm_tmr.count) {
306 peer->sm_tmr.count--;
308 wpa_printf(MSG_INFO, "TDLS: Retrying sending of message "
310 peer->sm_tmr.action_code);
312 if (peer->sm_tmr.buf == NULL) {
313 wpa_printf(MSG_INFO, "TDLS: No retry buffer available "
314 "for action_code=%u",
315 peer->sm_tmr.action_code);
316 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm,
321 /* resend TPK Handshake Message to Peer */
322 if (wpa_tdls_send_tpk_msg(sm, peer->sm_tmr.dest,
323 peer->sm_tmr.action_code,
324 peer->sm_tmr.dialog_token,
325 peer->sm_tmr.status_code,
327 peer->sm_tmr.buf_len)) {
328 wpa_printf(MSG_INFO, "TDLS: Failed to retry "
332 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
333 eloop_register_timeout(peer->sm_tmr.timer / 1000,
334 (peer->sm_tmr.timer % 1000) * 1000,
335 wpa_tdls_tpk_retry_timeout, sm, peer);
337 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
339 wpa_printf(MSG_DEBUG, "TDLS: Sending Teardown Request");
340 wpa_tdls_do_teardown(sm, peer,
341 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, 1);
346 static void wpa_tdls_tpk_retry_timeout_cancel(struct wpa_sm *sm,
347 struct wpa_tdls_peer *peer,
350 if (action_code == peer->sm_tmr.action_code) {
351 wpa_printf(MSG_DEBUG, "TDLS: Retry timeout cancelled for "
352 "action_code=%u", action_code);
354 /* Cancel Timeout registered */
355 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
357 /* free all resources meant for retry */
358 os_free(peer->sm_tmr.buf);
359 peer->sm_tmr.buf = NULL;
361 peer->sm_tmr.count = 0;
362 peer->sm_tmr.timer = 0;
363 peer->sm_tmr.buf_len = 0;
364 peer->sm_tmr.action_code = 0xff;
366 wpa_printf(MSG_INFO, "TDLS: Error in cancelling retry timeout "
367 "(Unknown action_code=%u)", action_code);
372 static void wpa_tdls_generate_tpk(struct wpa_tdls_peer *peer,
373 const u8 *own_addr, const u8 *bssid)
375 u8 key_input[SHA256_MAC_LEN];
378 u8 data[3 * ETH_ALEN];
380 /* IEEE Std 802.11z-2010 8.5.9.1:
381 * TPK-Key-Input = SHA-256(min(SNonce, ANonce) || max(SNonce, ANonce))
383 len[0] = WPA_NONCE_LEN;
384 len[1] = WPA_NONCE_LEN;
385 if (os_memcmp(peer->inonce, peer->rnonce, WPA_NONCE_LEN) < 0) {
386 nonce[0] = peer->inonce;
387 nonce[1] = peer->rnonce;
389 nonce[0] = peer->rnonce;
390 nonce[1] = peer->inonce;
392 wpa_hexdump(MSG_DEBUG, "TDLS: min(Nonce)", nonce[0], WPA_NONCE_LEN);
393 wpa_hexdump(MSG_DEBUG, "TDLS: max(Nonce)", nonce[1], WPA_NONCE_LEN);
394 sha256_vector(2, nonce, len, key_input);
395 wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-Key-Input",
396 key_input, SHA256_MAC_LEN);
399 * TPK-Key-Data = KDF-N_KEY(TPK-Key-Input, "TDLS PMK",
400 * min(MAC_I, MAC_R) || max(MAC_I, MAC_R) || BSSID || N_KEY)
401 * TODO: is N_KEY really included in KDF Context and if so, in which
402 * presentation format (little endian 16-bit?) is it used? It gets
403 * added by the KDF anyway..
406 if (os_memcmp(own_addr, peer->addr, ETH_ALEN) < 0) {
407 os_memcpy(data, own_addr, ETH_ALEN);
408 os_memcpy(data + ETH_ALEN, peer->addr, ETH_ALEN);
410 os_memcpy(data, peer->addr, ETH_ALEN);
411 os_memcpy(data + ETH_ALEN, own_addr, ETH_ALEN);
413 os_memcpy(data + 2 * ETH_ALEN, bssid, ETH_ALEN);
414 wpa_hexdump(MSG_DEBUG, "TDLS: KDF Context", data, sizeof(data));
416 sha256_prf(key_input, SHA256_MAC_LEN, "TDLS PMK", data, sizeof(data),
417 (u8 *) &peer->tpk, sizeof(peer->tpk));
418 wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-KCK",
419 peer->tpk.kck, sizeof(peer->tpk.kck));
420 wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-TK",
421 peer->tpk.tk, sizeof(peer->tpk.tk));
427 * wpa_tdls_ftie_mic - Calculate TDLS FTIE MIC
429 * @lnkid: Pointer to the beginning of Link Identifier IE
430 * @rsnie: Pointer to the beginning of RSN IE used for handshake
431 * @timeoutie: Pointer to the beginning of Timeout IE used for handshake
432 * @ftie: Pointer to the beginning of FT IE
433 * @mic: Pointer for writing MIC
435 * Calculate MIC for TDLS frame.
437 static int wpa_tdls_ftie_mic(const u8 *kck, u8 trans_seq, const u8 *lnkid,
438 const u8 *rsnie, const u8 *timeoutie,
439 const u8 *ftie, u8 *mic)
442 struct wpa_tdls_ftie *_ftie;
443 const struct wpa_tdls_lnkid *_lnkid;
445 int len = 2 * ETH_ALEN + 1 + 2 + lnkid[1] + 2 + rsnie[1] +
446 2 + timeoutie[1] + 2 + ftie[1];
447 buf = os_zalloc(len);
449 wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation");
454 _lnkid = (const struct wpa_tdls_lnkid *) lnkid;
455 /* 1) TDLS initiator STA MAC address */
456 os_memcpy(pos, _lnkid->init_sta, ETH_ALEN);
458 /* 2) TDLS responder STA MAC address */
459 os_memcpy(pos, _lnkid->resp_sta, ETH_ALEN);
461 /* 3) Transaction Sequence number */
463 /* 4) Link Identifier IE */
464 os_memcpy(pos, lnkid, 2 + lnkid[1]);
467 os_memcpy(pos, rsnie, 2 + rsnie[1]);
469 /* 6) Timeout Interval IE */
470 os_memcpy(pos, timeoutie, 2 + timeoutie[1]);
471 pos += 2 + timeoutie[1];
472 /* 7) FTIE, with the MIC field of the FTIE set to 0 */
473 os_memcpy(pos, ftie, 2 + ftie[1]);
474 _ftie = (struct wpa_tdls_ftie *) pos;
475 os_memset(_ftie->mic, 0, TDLS_MIC_LEN);
478 wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf);
479 wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16);
480 ret = omac1_aes_128(kck, buf, pos - buf, mic);
482 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16);
488 * wpa_tdls_key_mic_teardown - Calculate TDLS FTIE MIC for Teardown frame
490 * @trans_seq: Transaction Sequence Number (4 - Teardown)
491 * @rcode: Reason code for Teardown
492 * @dtoken: Dialog Token used for that particular link
493 * @lnkid: Pointer to the beginning of Link Identifier IE
494 * @ftie: Pointer to the beginning of FT IE
495 * @mic: Pointer for writing MIC
497 * Calculate MIC for TDLS frame.
499 static int wpa_tdls_key_mic_teardown(const u8 *kck, u8 trans_seq, u16 rcode,
500 u8 dtoken, const u8 *lnkid,
501 const u8 *ftie, u8 *mic)
504 struct wpa_tdls_ftie *_ftie;
511 len = 2 + lnkid[1] + sizeof(rcode) + sizeof(dtoken) +
512 sizeof(trans_seq) + 2 + ftie[1];
514 buf = os_zalloc(len);
516 wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation");
521 /* 1) Link Identifier IE */
522 os_memcpy(pos, lnkid, 2 + lnkid[1]);
525 WPA_PUT_LE16(pos, rcode);
526 pos += sizeof(rcode);
527 /* 3) Dialog token */
529 /* 4) Transaction Sequence number */
531 /* 7) FTIE, with the MIC field of the FTIE set to 0 */
532 os_memcpy(pos, ftie, 2 + ftie[1]);
533 _ftie = (struct wpa_tdls_ftie *) pos;
534 os_memset(_ftie->mic, 0, TDLS_MIC_LEN);
537 wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf);
538 wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16);
539 ret = omac1_aes_128(kck, buf, pos - buf, mic);
541 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16);
546 static int wpa_supplicant_verify_tdls_mic(u8 trans_seq,
547 struct wpa_tdls_peer *peer,
548 const u8 *lnkid, const u8 *timeoutie,
549 const struct wpa_tdls_ftie *ftie)
554 wpa_tdls_ftie_mic(peer->tpk.kck, trans_seq, lnkid,
555 peer->rsnie_p, timeoutie, (u8 *) ftie,
557 if (os_memcmp(mic, ftie->mic, 16) != 0) {
558 wpa_printf(MSG_INFO, "TDLS: Invalid MIC in FTIE - "
560 wpa_hexdump(MSG_DEBUG, "TDLS: Received MIC",
562 wpa_hexdump(MSG_DEBUG, "TDLS: Calculated MIC",
567 wpa_printf(MSG_WARNING, "TDLS: Could not verify TDLS MIC, "
568 "TPK not set - dropping packet");
575 static int wpa_supplicant_verify_tdls_mic_teardown(
576 u8 trans_seq, u16 rcode, u8 dtoken, struct wpa_tdls_peer *peer,
577 const u8 *lnkid, const struct wpa_tdls_ftie *ftie)
582 wpa_tdls_key_mic_teardown(peer->tpk.kck, trans_seq, rcode,
583 dtoken, lnkid, (u8 *) ftie, mic);
584 if (os_memcmp(mic, ftie->mic, 16) != 0) {
585 wpa_printf(MSG_INFO, "TDLS: Invalid MIC in Teardown - "
590 wpa_printf(MSG_INFO, "TDLS: Could not verify TDLS Teardown "
591 "MIC, TPK not set - dropping packet");
598 static void wpa_tdls_tpk_timeout(void *eloop_ctx, void *timeout_ctx)
600 struct wpa_sm *sm = eloop_ctx;
601 struct wpa_tdls_peer *peer = timeout_ctx;
604 * On TPK lifetime expiration, we have an option of either tearing down
605 * the direct link or trying to re-initiate it. The selection of what
606 * to do is not strictly speaking controlled by our role in the expired
607 * link, but for now, use that to select whether to renew or tear down
611 if (peer->initiator) {
612 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
613 " - try to renew", MAC2STR(peer->addr));
614 wpa_tdls_start(sm, peer->addr);
616 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
617 " - tear down", MAC2STR(peer->addr));
618 wpa_tdls_do_teardown(sm, peer,
619 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, 1);
624 static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
626 wpa_printf(MSG_DEBUG, "TDLS: Clear state for peer " MACSTR,
627 MAC2STR(peer->addr));
628 eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
629 eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
630 peer->reconfig_key = 0;
632 os_free(peer->sm_tmr.buf);
633 peer->sm_tmr.buf = NULL;
634 os_free(peer->ht_capabilities);
635 peer->ht_capabilities = NULL;
636 os_free(peer->vht_capabilities);
637 peer->vht_capabilities = NULL;
638 os_free(peer->ext_capab);
639 peer->ext_capab = NULL;
640 peer->rsnie_i_len = peer->rsnie_p_len = 0;
642 peer->tpk_set = peer->tpk_success = 0;
643 os_memset(&peer->tpk, 0, sizeof(peer->tpk));
644 os_memset(peer->inonce, 0, WPA_NONCE_LEN);
645 os_memset(peer->rnonce, 0, WPA_NONCE_LEN);
649 static void wpa_tdls_linkid(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
650 struct wpa_tdls_lnkid *lnkid)
652 lnkid->ie_type = WLAN_EID_LINK_ID;
653 lnkid->ie_len = 3 * ETH_ALEN;
654 os_memcpy(lnkid->bssid, sm->bssid, ETH_ALEN);
655 if (peer->initiator) {
656 os_memcpy(lnkid->init_sta, sm->own_addr, ETH_ALEN);
657 os_memcpy(lnkid->resp_sta, peer->addr, ETH_ALEN);
659 os_memcpy(lnkid->init_sta, peer->addr, ETH_ALEN);
660 os_memcpy(lnkid->resp_sta, sm->own_addr, ETH_ALEN);
665 int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
667 struct wpa_tdls_peer *peer;
668 struct wpa_tdls_ftie *ftie;
669 struct wpa_tdls_lnkid lnkid;
674 if (sm->tdls_disabled || !sm->tdls_supported)
677 /* Find the node and free from the list */
678 for (peer = sm->tdls; peer; peer = peer->next) {
679 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
684 wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
685 "Teardown " MACSTR, MAC2STR(addr));
689 dialog_token = peer->dtoken;
691 wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown for " MACSTR,
695 if (wpa_tdls_get_privacy(sm) && peer->tpk_set && peer->tpk_success) {
696 /* To add FTIE for Teardown request and compute MIC */
697 ielen += sizeof(*ftie);
698 #ifdef CONFIG_TDLS_TESTING
699 if (tdls_testing & TDLS_TESTING_LONG_FRAME)
701 #endif /* CONFIG_TDLS_TESTING */
704 rbuf = os_zalloc(ielen + 1);
709 if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success)
712 ftie = (struct wpa_tdls_ftie *) pos;
713 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
714 /* Using the recent nonce which should be for CONFIRM frame */
715 os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
716 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
717 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
718 pos = (u8 *) (ftie + 1);
719 #ifdef CONFIG_TDLS_TESTING
720 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
721 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
724 *pos++ = 255; /* FTIE subelem */
725 *pos++ = 168; /* FTIE subelem length */
728 #endif /* CONFIG_TDLS_TESTING */
729 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TDLS Teardown handshake",
730 (u8 *) ftie, pos - (u8 *) ftie);
732 /* compute MIC before sending */
733 wpa_tdls_linkid(sm, peer, &lnkid);
734 wpa_tdls_key_mic_teardown(peer->tpk.kck, 4, reason_code,
735 dialog_token, (u8 *) &lnkid, (u8 *) ftie,
739 /* TODO: register for a Timeout handler, if Teardown is not received at
740 * the other end, then try again another time */
742 /* request driver to send Teardown using this FTIE */
743 wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_TEARDOWN, 0,
744 reason_code, rbuf, pos - rbuf);
747 /* clear the Peerkey statemachine */
748 wpa_tdls_peer_free(sm, peer);
754 int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
756 struct wpa_tdls_peer *peer;
758 if (sm->tdls_disabled || !sm->tdls_supported)
761 for (peer = sm->tdls; peer; peer = peer->next) {
762 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
767 wpa_printf(MSG_DEBUG, "TDLS: Could not find peer " MACSTR
768 " for link Teardown", MAC2STR(addr));
772 if (!peer->tpk_success) {
773 wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR
774 " not connected - cannot Teardown link", MAC2STR(addr));
778 return wpa_tdls_do_teardown(sm, peer, reason_code, 0);
782 void wpa_tdls_disable_link(struct wpa_sm *sm, const u8 *addr)
784 struct wpa_tdls_peer *peer;
786 for (peer = sm->tdls; peer; peer = peer->next) {
787 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
792 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, addr);
793 wpa_tdls_peer_free(sm, peer);
798 static int wpa_tdls_recv_teardown(struct wpa_sm *sm, const u8 *src_addr,
799 const u8 *buf, size_t len)
801 struct wpa_tdls_peer *peer = NULL;
802 struct wpa_tdls_ftie *ftie;
803 struct wpa_tdls_lnkid *lnkid;
804 struct wpa_eapol_ie_parse kde;
809 /* Find the node and free from the list */
810 for (peer = sm->tdls; peer; peer = peer->next) {
811 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
816 wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
817 "Teardown " MACSTR, MAC2STR(src_addr));
822 pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
824 reason_code = WPA_GET_LE16(pos);
827 wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown Request from " MACSTR
828 " (reason code %u)", MAC2STR(src_addr), reason_code);
830 ielen = len - (pos - buf); /* start of IE in buf */
831 if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) {
832 wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in Teardown");
836 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
837 wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TDLS "
841 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
843 if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success)
846 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
847 wpa_printf(MSG_INFO, "TDLS: No FTIE in TDLS Teardown");
851 ftie = (struct wpa_tdls_ftie *) kde.ftie;
853 /* Process MIC check to see if TDLS Teardown is right */
854 if (wpa_supplicant_verify_tdls_mic_teardown(4, reason_code,
856 (u8 *) lnkid, ftie) < 0) {
857 wpa_printf(MSG_DEBUG, "TDLS: MIC failure for TDLS "
858 "Teardown Request from " MACSTR, MAC2STR(src_addr));
864 * Request the driver to disable the direct link and clear associated
867 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
869 /* clear the Peerkey statemachine */
870 wpa_tdls_peer_free(sm, peer);
877 * wpa_tdls_send_error - To send suitable TDLS status response with
878 * appropriate status code mentioning reason for error/failure.
879 * @dst - MAC addr of Peer station
880 * @tdls_action - TDLS frame type for which error code is sent
881 * @status - status code mentioning reason
884 static int wpa_tdls_send_error(struct wpa_sm *sm, const u8 *dst,
885 u8 tdls_action, u8 dialog_token, u16 status)
887 wpa_printf(MSG_DEBUG, "TDLS: Sending error to " MACSTR
888 " (action=%u status=%u)",
889 MAC2STR(dst), tdls_action, status);
890 return wpa_tdls_tpk_send(sm, dst, tdls_action, dialog_token, status,
895 static struct wpa_tdls_peer *
896 wpa_tdls_add_peer(struct wpa_sm *sm, const u8 *addr, int *existing)
898 struct wpa_tdls_peer *peer;
902 for (peer = sm->tdls; peer; peer = peer->next) {
903 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0) {
906 return peer; /* re-use existing entry */
910 wpa_printf(MSG_INFO, "TDLS: Creating peer entry for " MACSTR,
913 peer = os_zalloc(sizeof(*peer));
917 os_memcpy(peer->addr, addr, ETH_ALEN);
918 peer->next = sm->tdls;
925 static int wpa_tdls_send_tpk_m1(struct wpa_sm *sm,
926 struct wpa_tdls_peer *peer)
929 struct wpa_tdls_timeoutie timeoutie;
931 struct wpa_tdls_ftie *ftie;
932 u8 *rbuf, *pos, *count_pos;
934 struct rsn_ie_hdr *hdr;
937 if (!wpa_tdls_get_privacy(sm)) {
938 wpa_printf(MSG_DEBUG, "TDLS: No security used on the link");
939 peer->rsnie_i_len = 0;
944 * TPK Handshake Message 1:
945 * FTIE: ANonce=0, SNonce=initiator nonce MIC=0, DataKDs=(RSNIE_I,
946 * Timeout Interval IE))
950 hdr = (struct rsn_ie_hdr *) peer->rsnie_i;
951 hdr->elem_id = WLAN_EID_RSN;
952 WPA_PUT_LE16(hdr->version, RSN_VERSION);
954 pos = (u8 *) (hdr + 1);
955 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
956 pos += RSN_SELECTOR_LEN;
963 * AES-CCMP is the default Encryption preferred for TDLS, so
964 * RSN IE is filled only with CCMP CIPHER
965 * Note: TKIP is not used to encrypt TDLS link.
967 * Regardless of the cipher used on the AP connection, select CCMP
970 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
971 pos += RSN_SELECTOR_LEN;
974 WPA_PUT_LE16(count_pos, count);
976 WPA_PUT_LE16(pos, 1);
978 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE);
979 pos += RSN_SELECTOR_LEN;
981 rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
982 rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2;
983 #ifdef CONFIG_TDLS_TESTING
984 if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) {
985 wpa_printf(MSG_DEBUG, "TDLS: Use alternative RSN IE for "
987 rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
989 #endif /* CONFIG_TDLS_TESTING */
990 WPA_PUT_LE16(pos, rsn_capab);
992 #ifdef CONFIG_TDLS_TESTING
993 if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) {
994 /* Number of PMKIDs */
998 #endif /* CONFIG_TDLS_TESTING */
1000 hdr->len = (pos - peer->rsnie_i) - 2;
1001 peer->rsnie_i_len = pos - peer->rsnie_i;
1002 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake",
1003 peer->rsnie_i, peer->rsnie_i_len);
1007 if (wpa_tdls_get_privacy(sm))
1008 buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
1009 sizeof(struct wpa_tdls_timeoutie);
1010 #ifdef CONFIG_TDLS_TESTING
1011 if (wpa_tdls_get_privacy(sm) &&
1012 (tdls_testing & TDLS_TESTING_LONG_FRAME))
1014 if (tdls_testing & TDLS_TESTING_DIFF_BSSID)
1015 buf_len += sizeof(struct wpa_tdls_lnkid);
1016 #endif /* CONFIG_TDLS_TESTING */
1017 rbuf = os_zalloc(buf_len + 1);
1019 wpa_tdls_peer_free(sm, peer);
1024 if (!wpa_tdls_get_privacy(sm))
1027 /* Initiator RSN IE */
1028 pos = wpa_add_ie(pos, peer->rsnie_i, peer->rsnie_i_len);
1030 ftie = (struct wpa_tdls_ftie *) pos;
1031 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
1032 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
1034 if (os_get_random(peer->inonce, WPA_NONCE_LEN)) {
1035 wpa_msg(sm->ctx->msg_ctx, MSG_WARNING,
1036 "TDLS: Failed to get random data for initiator Nonce");
1038 wpa_tdls_peer_free(sm, peer);
1041 wpa_hexdump(MSG_DEBUG, "TDLS: Initiator Nonce for TPK handshake",
1042 peer->inonce, WPA_NONCE_LEN);
1043 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
1045 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK Handshake M1",
1046 (u8 *) ftie, sizeof(struct wpa_tdls_ftie));
1048 pos = (u8 *) (ftie + 1);
1050 #ifdef CONFIG_TDLS_TESTING
1051 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
1052 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
1054 ftie->ie_len += 170;
1055 *pos++ = 255; /* FTIE subelem */
1056 *pos++ = 168; /* FTIE subelem length */
1059 #endif /* CONFIG_TDLS_TESTING */
1062 peer->lifetime = TPK_LIFETIME;
1063 #ifdef CONFIG_TDLS_TESTING
1064 if (tdls_testing & TDLS_TESTING_SHORT_LIFETIME) {
1065 wpa_printf(MSG_DEBUG, "TDLS: Testing - use short TPK "
1067 peer->lifetime = 301;
1069 if (tdls_testing & TDLS_TESTING_LONG_LIFETIME) {
1070 wpa_printf(MSG_DEBUG, "TDLS: Testing - use long TPK "
1072 peer->lifetime = 0xffffffff;
1074 #endif /* CONFIG_TDLS_TESTING */
1075 pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
1076 sizeof(timeoutie), peer->lifetime);
1077 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", peer->lifetime);
1081 #ifdef CONFIG_TDLS_TESTING
1082 if (tdls_testing & TDLS_TESTING_DIFF_BSSID) {
1083 wpa_printf(MSG_DEBUG, "TDLS: Testing - use incorrect BSSID in "
1085 struct wpa_tdls_lnkid *l = (struct wpa_tdls_lnkid *) pos;
1086 wpa_tdls_linkid(sm, peer, l);
1087 l->bssid[5] ^= 0x01;
1090 #endif /* CONFIG_TDLS_TESTING */
1092 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Request / TPK "
1093 "Handshake Message 1 (peer " MACSTR ")",
1094 MAC2STR(peer->addr));
1096 status = wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST,
1097 1, 0, rbuf, pos - rbuf);
1104 static int wpa_tdls_send_tpk_m2(struct wpa_sm *sm,
1105 const unsigned char *src_addr, u8 dtoken,
1106 struct wpa_tdls_lnkid *lnkid,
1107 const struct wpa_tdls_peer *peer)
1112 struct wpa_tdls_timeoutie timeoutie;
1113 struct wpa_tdls_ftie *ftie;
1117 if (wpa_tdls_get_privacy(sm)) {
1118 /* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce),
1120 buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
1121 sizeof(struct wpa_tdls_timeoutie);
1122 #ifdef CONFIG_TDLS_TESTING
1123 if (tdls_testing & TDLS_TESTING_LONG_FRAME)
1125 #endif /* CONFIG_TDLS_TESTING */
1128 rbuf = os_zalloc(buf_len + 1);
1133 if (!wpa_tdls_get_privacy(sm))
1137 pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len);
1139 ftie = (struct wpa_tdls_ftie *) pos;
1140 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
1141 /* TODO: ftie->mic_control to set 2-RESPONSE */
1142 os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
1143 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
1144 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
1145 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK M2",
1146 (u8 *) ftie, sizeof(*ftie));
1148 pos = (u8 *) (ftie + 1);
1150 #ifdef CONFIG_TDLS_TESTING
1151 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
1152 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
1154 ftie->ie_len += 170;
1155 *pos++ = 255; /* FTIE subelem */
1156 *pos++ = 168; /* FTIE subelem length */
1159 #endif /* CONFIG_TDLS_TESTING */
1162 lifetime = peer->lifetime;
1163 #ifdef CONFIG_TDLS_TESTING
1164 if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_RESP) {
1165 wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK "
1166 "lifetime in response");
1169 #endif /* CONFIG_TDLS_TESTING */
1170 pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
1171 sizeof(timeoutie), lifetime);
1172 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds from initiator",
1175 /* compute MIC before sending */
1176 wpa_tdls_ftie_mic(peer->tpk.kck, 2, (u8 *) lnkid, peer->rsnie_p,
1177 (u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
1180 status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE,
1181 dtoken, 0, rbuf, pos - rbuf);
1188 static int wpa_tdls_send_tpk_m3(struct wpa_sm *sm,
1189 const unsigned char *src_addr, u8 dtoken,
1190 struct wpa_tdls_lnkid *lnkid,
1191 const struct wpa_tdls_peer *peer)
1195 struct wpa_tdls_ftie *ftie;
1196 struct wpa_tdls_timeoutie timeoutie;
1201 if (wpa_tdls_get_privacy(sm)) {
1202 /* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce),
1204 buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) +
1205 sizeof(struct wpa_tdls_timeoutie);
1206 #ifdef CONFIG_TDLS_TESTING
1207 if (tdls_testing & TDLS_TESTING_LONG_FRAME)
1209 #endif /* CONFIG_TDLS_TESTING */
1212 rbuf = os_zalloc(buf_len + 1);
1217 if (!wpa_tdls_get_privacy(sm))
1221 pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len);
1223 ftie = (struct wpa_tdls_ftie *) pos;
1224 ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION;
1225 /*TODO: ftie->mic_control to set 3-CONFIRM */
1226 os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN);
1227 os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN);
1228 ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2;
1230 pos = (u8 *) (ftie + 1);
1232 #ifdef CONFIG_TDLS_TESTING
1233 if (tdls_testing & TDLS_TESTING_LONG_FRAME) {
1234 wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to "
1236 ftie->ie_len += 170;
1237 *pos++ = 255; /* FTIE subelem */
1238 *pos++ = 168; /* FTIE subelem length */
1241 #endif /* CONFIG_TDLS_TESTING */
1244 lifetime = peer->lifetime;
1245 #ifdef CONFIG_TDLS_TESTING
1246 if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_CONF) {
1247 wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK "
1248 "lifetime in confirm");
1251 #endif /* CONFIG_TDLS_TESTING */
1252 pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
1253 sizeof(timeoutie), lifetime);
1254 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds",
1257 /* compute MIC before sending */
1258 wpa_tdls_ftie_mic(peer->tpk.kck, 3, (u8 *) lnkid, peer->rsnie_p,
1259 (u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
1262 status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM,
1263 dtoken, 0, rbuf, pos - rbuf);
1270 static int wpa_tdls_send_discovery_response(struct wpa_sm *sm,
1271 struct wpa_tdls_peer *peer,
1274 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Discovery Response "
1275 "(peer " MACSTR ")", MAC2STR(peer->addr));
1277 return wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_DISCOVERY_RESPONSE,
1278 dialog_token, 0, NULL, 0);
1283 wpa_tdls_process_discovery_request(struct wpa_sm *sm, const u8 *addr,
1284 const u8 *buf, size_t len)
1286 struct wpa_eapol_ie_parse kde;
1287 const struct wpa_tdls_lnkid *lnkid;
1288 struct wpa_tdls_peer *peer;
1289 size_t min_req_len = sizeof(struct wpa_tdls_frame) +
1290 1 /* dialog token */ + sizeof(struct wpa_tdls_lnkid);
1293 wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from " MACSTR,
1296 if (len < min_req_len) {
1297 wpa_printf(MSG_DEBUG, "TDLS Discovery Request is too short: "
1302 dialog_token = buf[sizeof(struct wpa_tdls_frame)];
1304 if (wpa_supplicant_parse_ies(buf + sizeof(struct wpa_tdls_frame) + 1,
1305 len - (sizeof(struct wpa_tdls_frame) + 1),
1310 wpa_printf(MSG_DEBUG, "TDLS: Link ID not found in Discovery "
1315 lnkid = (const struct wpa_tdls_lnkid *) kde.lnkid;
1317 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
1318 wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from different "
1319 " BSS " MACSTR, MAC2STR(lnkid->bssid));
1323 peer = wpa_tdls_add_peer(sm, addr, NULL);
1327 return wpa_tdls_send_discovery_response(sm, peer, dialog_token);
1331 int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr)
1333 if (sm->tdls_disabled || !sm->tdls_supported)
1336 wpa_printf(MSG_DEBUG, "TDLS: Sending Discovery Request to peer "
1337 MACSTR, MAC2STR(addr));
1338 return wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_DISCOVERY_REQUEST,
1343 static int copy_supp_rates(const struct wpa_eapol_ie_parse *kde,
1344 struct wpa_tdls_peer *peer)
1346 if (!kde->supp_rates) {
1347 wpa_printf(MSG_DEBUG, "TDLS: No supported rates received");
1350 peer->supp_rates_len = merge_byte_arrays(
1351 peer->supp_rates, sizeof(peer->supp_rates),
1352 kde->supp_rates + 2, kde->supp_rates_len - 2,
1353 kde->ext_supp_rates ? kde->ext_supp_rates + 2 : NULL,
1354 kde->ext_supp_rates_len - 2);
1359 static int copy_peer_ht_capab(const struct wpa_eapol_ie_parse *kde,
1360 struct wpa_tdls_peer *peer)
1362 if (!kde->ht_capabilities ||
1363 kde->ht_capabilities_len <
1364 sizeof(struct ieee80211_ht_capabilities) ) {
1365 wpa_printf(MSG_DEBUG, "TDLS: No supported ht capabilities "
1370 if (!peer->ht_capabilities) {
1371 peer->ht_capabilities =
1372 os_zalloc(sizeof(struct ieee80211_ht_capabilities));
1373 if (peer->ht_capabilities == NULL)
1377 os_memcpy(peer->ht_capabilities, kde->ht_capabilities,
1378 sizeof(struct ieee80211_ht_capabilities));
1379 wpa_hexdump(MSG_DEBUG, "TDLS: Peer HT capabilities",
1380 (u8 *) peer->ht_capabilities,
1381 sizeof(struct ieee80211_ht_capabilities));
1387 static int copy_peer_vht_capab(const struct wpa_eapol_ie_parse *kde,
1388 struct wpa_tdls_peer *peer)
1390 if (!kde->vht_capabilities ||
1391 kde->vht_capabilities_len <
1392 sizeof(struct ieee80211_vht_capabilities) ) {
1393 wpa_printf(MSG_DEBUG, "TDLS: No supported vht capabilities "
1398 if (!peer->vht_capabilities) {
1399 peer->vht_capabilities =
1400 os_zalloc(sizeof(struct ieee80211_vht_capabilities));
1401 if (peer->vht_capabilities == NULL)
1405 os_memcpy(peer->vht_capabilities, kde->vht_capabilities,
1406 sizeof(struct ieee80211_vht_capabilities));
1407 wpa_hexdump(MSG_DEBUG, "TDLS: Peer VHT capabilities",
1408 (u8 *) peer->vht_capabilities,
1409 sizeof(struct ieee80211_vht_capabilities));
1415 static int copy_peer_ext_capab(const struct wpa_eapol_ie_parse *kde,
1416 struct wpa_tdls_peer *peer)
1418 if (!kde->ext_capab) {
1419 wpa_printf(MSG_DEBUG, "TDLS: No extended capabilities "
1424 if (!peer->ext_capab || peer->ext_capab_len < kde->ext_capab_len - 2) {
1425 /* Need to allocate buffer to fit the new information */
1426 os_free(peer->ext_capab);
1427 peer->ext_capab = os_zalloc(kde->ext_capab_len - 2);
1428 if (peer->ext_capab == NULL)
1432 peer->ext_capab_len = kde->ext_capab_len - 2;
1433 os_memcpy(peer->ext_capab, kde->ext_capab + 2, peer->ext_capab_len);
1439 static int wpa_tdls_process_tpk_m1(struct wpa_sm *sm, const u8 *src_addr,
1440 const u8 *buf, size_t len)
1442 struct wpa_tdls_peer *peer;
1443 struct wpa_eapol_ie_parse kde;
1444 struct wpa_ie_data ie;
1447 struct wpa_tdls_ftie *ftie = NULL;
1448 struct wpa_tdls_timeoutie *timeoutie;
1449 struct wpa_tdls_lnkid *lnkid;
1452 struct rsn_ie_hdr *hdr;
1459 u16 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
1460 int tdls_prohibited = sm->tdls_prohibited;
1461 int existing_peer = 0;
1467 cpos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
1469 /* driver had already verified the frame format */
1470 dtoken = *cpos++; /* dialog token */
1472 wpa_printf(MSG_INFO, "TDLS: Dialog Token in TPK M1 %d", dtoken);
1474 peer = wpa_tdls_add_peer(sm, src_addr, &existing_peer);
1478 /* If found, use existing entry instead of adding a new one;
1479 * how to handle the case where both ends initiate at the
1481 if (existing_peer) {
1482 if (peer->tpk_success) {
1483 wpa_printf(MSG_DEBUG, "TDLS: TDLS Setup Request while "
1484 "direct link is enabled - tear down the "
1487 /* TODO: Disabling the link would be more proper
1488 * operation here, but it seems to trigger a race with
1489 * some drivers handling the new request frame. */
1490 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
1492 if (sm->tdls_external_setup)
1493 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK,
1496 wpa_tdls_del_key(sm, peer);
1498 wpa_tdls_peer_free(sm, peer);
1502 * An entry is already present, so check if we already sent a
1503 * TDLS Setup Request. If so, compare MAC addresses and let the
1504 * STA with the lower MAC address continue as the initiator.
1505 * The other negotiation is terminated.
1507 if (peer->initiator) {
1508 if (os_memcmp(sm->own_addr, src_addr, ETH_ALEN) < 0) {
1509 wpa_printf(MSG_DEBUG, "TDLS: Discard request "
1510 "from peer with higher address "
1511 MACSTR, MAC2STR(src_addr));
1514 wpa_printf(MSG_DEBUG, "TDLS: Accept request "
1515 "from peer with lower address "
1516 MACSTR " (terminate previously "
1517 "initiated negotiation",
1519 if (sm->tdls_external_setup)
1520 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK,
1523 wpa_tdls_del_key(sm, peer);
1524 wpa_tdls_peer_free(sm, peer);
1529 /* capability information */
1530 peer->capability = WPA_GET_LE16(cpos);
1533 ielen = len - (cpos - buf); /* start of IE in buf */
1534 if (wpa_supplicant_parse_ies(cpos, ielen, &kde) < 0) {
1535 wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M1");
1539 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
1540 wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
1544 wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M1",
1545 kde.lnkid, kde.lnkid_len);
1546 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
1547 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
1548 wpa_printf(MSG_INFO, "TDLS: TPK M1 from diff BSS");
1549 status = WLAN_STATUS_NOT_IN_SAME_BSS;
1553 wpa_printf(MSG_DEBUG, "TDLS: TPK M1 - TPK initiator " MACSTR,
1556 if (copy_supp_rates(&kde, peer) < 0)
1559 if (copy_peer_ht_capab(&kde, peer) < 0)
1562 if (copy_peer_vht_capab(&kde, peer) < 0)
1565 if (copy_peer_ext_capab(&kde, peer) < 0)
1568 peer->qos_info = kde.qosinfo;
1570 peer->aid = kde.aid;
1572 #ifdef CONFIG_TDLS_TESTING
1573 if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) {
1574 peer = wpa_tdls_add_peer(sm, src_addr, NULL);
1577 wpa_printf(MSG_DEBUG, "TDLS: Testing concurrent initiation of "
1578 "TDLS setup - send own request");
1579 peer->initiator = 1;
1580 wpa_tdls_send_tpk_m1(sm, peer);
1583 if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
1585 wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
1587 tdls_prohibited = 0;
1589 #endif /* CONFIG_TDLS_TESTING */
1591 if (tdls_prohibited) {
1592 wpa_printf(MSG_INFO, "TDLS: TDLS prohibited in this BSS");
1593 status = WLAN_STATUS_REQUEST_DECLINED;
1597 if (!wpa_tdls_get_privacy(sm)) {
1599 wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M1 while "
1600 "security is disabled");
1601 status = WLAN_STATUS_SECURITY_DISABLED;
1607 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
1608 kde.rsn_ie == NULL) {
1609 wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M1");
1610 status = WLAN_STATUS_INVALID_PARAMETERS;
1614 if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) {
1615 wpa_printf(MSG_INFO, "TDLS: Too long Initiator RSN IE in "
1617 status = WLAN_STATUS_INVALID_RSNIE;
1621 if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
1622 wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M1");
1623 status = WLAN_STATUS_INVALID_RSNIE;
1627 cipher = ie.pairwise_cipher;
1628 if (cipher & WPA_CIPHER_CCMP) {
1629 wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
1630 cipher = WPA_CIPHER_CCMP;
1632 wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M1");
1633 status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1637 if ((ie.capabilities &
1638 (WPA_CAPABILITY_NO_PAIRWISE | WPA_CAPABILITY_PEERKEY_ENABLED)) !=
1639 WPA_CAPABILITY_PEERKEY_ENABLED) {
1640 wpa_printf(MSG_INFO, "TDLS: Invalid RSN Capabilities in "
1642 status = WLAN_STATUS_INVALID_RSN_IE_CAPAB;
1647 if (kde.key_lifetime == NULL) {
1648 wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M1");
1649 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
1652 timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
1653 lifetime = WPA_GET_LE32(timeoutie->value);
1654 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", lifetime);
1655 if (lifetime < 300) {
1656 wpa_printf(MSG_INFO, "TDLS: Too short TPK lifetime");
1657 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
1662 #ifdef CONFIG_TDLS_TESTING
1663 if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) {
1664 if (os_memcmp(sm->own_addr, peer->addr, ETH_ALEN) < 0) {
1666 * The request frame from us is going to win, so do not
1667 * replace information based on this request frame from
1670 goto skip_rsn_check;
1673 #endif /* CONFIG_TDLS_TESTING */
1675 peer->initiator = 0; /* Need to check */
1676 peer->dtoken = dtoken;
1678 if (!wpa_tdls_get_privacy(sm)) {
1679 peer->rsnie_i_len = 0;
1680 peer->rsnie_p_len = 0;
1681 peer->cipher = WPA_CIPHER_NONE;
1682 goto skip_rsn_check;
1685 ftie = (struct wpa_tdls_ftie *) kde.ftie;
1686 os_memcpy(peer->inonce, ftie->Snonce, WPA_NONCE_LEN);
1687 os_memcpy(peer->rsnie_i, kde.rsn_ie, kde.rsn_ie_len);
1688 peer->rsnie_i_len = kde.rsn_ie_len;
1689 peer->cipher = cipher;
1691 if (os_get_random(peer->rnonce, WPA_NONCE_LEN)) {
1692 wpa_msg(sm->ctx->ctx, MSG_WARNING,
1693 "TDLS: Failed to get random data for responder nonce");
1694 wpa_tdls_peer_free(sm, peer);
1699 /* get version info from RSNIE received from Peer */
1700 hdr = (struct rsn_ie_hdr *) kde.rsn_ie;
1701 rsn_ver = WPA_GET_LE16(hdr->version);
1703 /* use min(peer's version, out version) */
1704 if (rsn_ver > RSN_VERSION)
1705 rsn_ver = RSN_VERSION;
1707 hdr = (struct rsn_ie_hdr *) peer->rsnie_p;
1709 hdr->elem_id = WLAN_EID_RSN;
1710 WPA_PUT_LE16(hdr->version, rsn_ver);
1711 pos = (u8 *) (hdr + 1);
1713 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED);
1714 pos += RSN_SELECTOR_LEN;
1715 /* Include only the selected cipher in pairwise cipher suite */
1716 WPA_PUT_LE16(pos, 1);
1718 if (cipher == WPA_CIPHER_CCMP)
1719 RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
1720 pos += RSN_SELECTOR_LEN;
1722 WPA_PUT_LE16(pos, 1);
1724 RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE);
1725 pos += RSN_SELECTOR_LEN;
1727 rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED;
1728 rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2;
1729 WPA_PUT_LE16(pos, rsn_capab);
1732 hdr->len = (pos - peer->rsnie_p) - 2;
1733 peer->rsnie_p_len = pos - peer->rsnie_p;
1736 /* temp fix: validation of RSNIE later */
1737 os_memcpy(peer->rsnie_p, peer->rsnie_i, peer->rsnie_i_len);
1738 peer->rsnie_p_len = peer->rsnie_i_len;
1740 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake",
1741 peer->rsnie_p, peer->rsnie_p_len);
1743 peer->lifetime = lifetime;
1745 wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
1748 /* add the peer to the driver as a "setup in progress" peer */
1749 wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, 0, NULL, 0, NULL, NULL, 0,
1752 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Response / TPK M2");
1753 if (wpa_tdls_send_tpk_m2(sm, src_addr, dtoken, lnkid, peer) < 0) {
1754 wpa_tdls_disable_link(sm, peer->addr);
1761 wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken,
1767 static int wpa_tdls_enable_link(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
1769 peer->tpk_success = 1;
1770 eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
1771 if (wpa_tdls_get_privacy(sm)) {
1772 u32 lifetime = peer->lifetime;
1774 * Start the initiator process a bit earlier to avoid race
1775 * condition with the responder sending teardown request.
1777 if (lifetime > 3 && peer->initiator)
1779 eloop_register_timeout(lifetime, 0, wpa_tdls_tpk_timeout,
1781 #ifdef CONFIG_TDLS_TESTING
1782 if (tdls_testing & TDLS_TESTING_NO_TPK_EXPIRATION) {
1783 wpa_printf(MSG_DEBUG, "TDLS: Testing - disable TPK "
1785 eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
1787 #endif /* CONFIG_TDLS_TESTING */
1790 /* add supported rates, capabilities, and qos_info to the TDLS peer */
1791 if (wpa_sm_tdls_peer_addset(sm, peer->addr, 0, peer->aid,
1793 peer->supp_rates, peer->supp_rates_len,
1794 peer->ht_capabilities,
1795 peer->vht_capabilities,
1796 peer->qos_info, peer->ext_capab,
1797 peer->ext_capab_len) < 0)
1800 if (peer->reconfig_key && wpa_tdls_set_key(sm, peer) < 0) {
1801 wpa_printf(MSG_INFO, "TDLS: Could not configure key to the "
1805 peer->reconfig_key = 0;
1807 return wpa_sm_tdls_oper(sm, TDLS_ENABLE_LINK, peer->addr);
1811 static int wpa_tdls_process_tpk_m2(struct wpa_sm *sm, const u8 *src_addr,
1812 const u8 *buf, size_t len)
1814 struct wpa_tdls_peer *peer;
1815 struct wpa_eapol_ie_parse kde;
1816 struct wpa_ie_data ie;
1818 struct wpa_tdls_ftie *ftie;
1819 struct wpa_tdls_timeoutie *timeoutie;
1820 struct wpa_tdls_lnkid *lnkid;
1828 wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Response / TPK M2 "
1829 "(Peer " MACSTR ")", MAC2STR(src_addr));
1830 for (peer = sm->tdls; peer; peer = peer->next) {
1831 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
1835 wpa_printf(MSG_INFO, "TDLS: No matching peer found for "
1836 "TPK M2: " MACSTR, MAC2STR(src_addr));
1839 if (!peer->initiator) {
1841 * This may happen if both devices try to initiate TDLS at the
1842 * same time and we accept the TPK M1 from the peer in
1843 * wpa_tdls_process_tpk_m1() and clear our previous state.
1845 wpa_printf(MSG_INFO, "TDLS: We were not the initiator, so "
1846 "ignore TPK M2 from " MACSTR, MAC2STR(src_addr));
1849 wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_REQUEST);
1851 if (len < 3 + 2 + 1) {
1852 wpa_tdls_disable_link(sm, src_addr);
1857 pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
1858 status = WPA_GET_LE16(pos);
1859 pos += 2 /* status code */;
1861 if (status != WLAN_STATUS_SUCCESS) {
1862 wpa_printf(MSG_INFO, "TDLS: Status code in TPK M2: %u",
1864 wpa_tdls_disable_link(sm, src_addr);
1868 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
1870 /* TODO: need to verify dialog token matches here or in kernel */
1871 dtoken = *pos++; /* dialog token */
1873 wpa_printf(MSG_DEBUG, "TDLS: Dialog Token in TPK M2 %d", dtoken);
1875 if (len < 3 + 2 + 1 + 2) {
1876 wpa_tdls_disable_link(sm, src_addr);
1880 /* capability information */
1881 peer->capability = WPA_GET_LE16(pos);
1884 ielen = len - (pos - buf); /* start of IE in buf */
1885 if (wpa_supplicant_parse_ies(pos, ielen, &kde) < 0) {
1886 wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M2");
1890 #ifdef CONFIG_TDLS_TESTING
1891 if (tdls_testing & TDLS_TESTING_DECLINE_RESP) {
1892 wpa_printf(MSG_DEBUG, "TDLS: Testing - decline response");
1893 status = WLAN_STATUS_REQUEST_DECLINED;
1896 #endif /* CONFIG_TDLS_TESTING */
1898 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
1899 wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
1903 wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M2",
1904 kde.lnkid, kde.lnkid_len);
1905 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
1907 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
1908 wpa_printf(MSG_INFO, "TDLS: TPK M2 from different BSS");
1909 status = WLAN_STATUS_NOT_IN_SAME_BSS;
1913 if (copy_supp_rates(&kde, peer) < 0)
1916 if (copy_peer_ht_capab(&kde, peer) < 0)
1919 if (copy_peer_vht_capab(&kde, peer) < 0)
1922 if (copy_peer_ext_capab(&kde, peer) < 0)
1925 peer->qos_info = kde.qosinfo;
1927 peer->aid = kde.aid;
1929 if (!wpa_tdls_get_privacy(sm)) {
1930 peer->rsnie_p_len = 0;
1931 peer->cipher = WPA_CIPHER_NONE;
1935 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
1936 kde.rsn_ie == NULL) {
1937 wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M2");
1938 status = WLAN_STATUS_INVALID_PARAMETERS;
1941 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
1942 kde.rsn_ie, kde.rsn_ie_len);
1945 * FIX: bitwise comparison of RSN IE is not the correct way of
1946 * validation this. It can be different, but certain fields must
1947 * match. Since we list only a single pairwise cipher in TPK M1, the
1948 * memcmp is likely to work in most cases, though.
1950 if (kde.rsn_ie_len != peer->rsnie_i_len ||
1951 os_memcmp(peer->rsnie_i, kde.rsn_ie, peer->rsnie_i_len) != 0) {
1952 wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M2 does "
1953 "not match with RSN IE used in TPK M1");
1954 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Sent in TPK M1",
1955 peer->rsnie_i, peer->rsnie_i_len);
1956 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
1957 kde.rsn_ie, kde.rsn_ie_len);
1958 status = WLAN_STATUS_INVALID_RSNIE;
1962 if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
1963 wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M2");
1964 status = WLAN_STATUS_INVALID_RSNIE;
1968 cipher = ie.pairwise_cipher;
1969 if (cipher == WPA_CIPHER_CCMP) {
1970 wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
1971 cipher = WPA_CIPHER_CCMP;
1973 wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M2");
1974 status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1978 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M2",
1979 kde.ftie, sizeof(*ftie));
1980 ftie = (struct wpa_tdls_ftie *) kde.ftie;
1982 if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
1983 wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M2 does "
1984 "not match with FTIE SNonce used in TPK M1");
1985 /* Silently discard the frame */
1989 /* Responder Nonce and RSN IE */
1990 os_memcpy(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN);
1991 os_memcpy(peer->rsnie_p, kde.rsn_ie, kde.rsn_ie_len);
1992 peer->rsnie_p_len = kde.rsn_ie_len;
1993 peer->cipher = cipher;
1996 if (kde.key_lifetime == NULL) {
1997 wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M2");
1998 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
2001 timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
2002 lifetime = WPA_GET_LE32(timeoutie->value);
2003 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M2",
2005 if (lifetime != peer->lifetime) {
2006 wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
2007 "TPK M2 (expected %u)", lifetime, peer->lifetime);
2008 status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
2012 wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
2014 /* Process MIC check to see if TPK M2 is right */
2015 if (wpa_supplicant_verify_tdls_mic(2, peer, (u8 *) lnkid,
2016 (u8 *) timeoutie, ftie) < 0) {
2017 /* Discard the frame */
2018 wpa_tdls_del_key(sm, peer);
2019 wpa_tdls_peer_free(sm, peer);
2020 if (sm->tdls_external_setup)
2021 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
2025 if (wpa_tdls_set_key(sm, peer) < 0) {
2027 * Some drivers may not be able to config the key prior to full
2028 * STA entry having been configured.
2030 wpa_printf(MSG_DEBUG, "TDLS: Try to configure TPK again after "
2031 "STA entry is complete");
2032 peer->reconfig_key = 1;
2036 peer->dtoken = dtoken;
2038 wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Confirm / "
2039 "TPK Handshake Message 3");
2040 if (wpa_tdls_send_tpk_m3(sm, src_addr, dtoken, lnkid, peer) < 0) {
2041 wpa_tdls_disable_link(sm, peer->addr);
2045 ret = wpa_tdls_enable_link(sm, peer);
2047 wpa_printf(MSG_DEBUG, "TDLS: Could not enable link");
2048 wpa_tdls_do_teardown(sm, peer,
2049 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, 1);
2054 wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken,
2056 wpa_tdls_disable_link(sm, peer->addr);
2061 static int wpa_tdls_process_tpk_m3(struct wpa_sm *sm, const u8 *src_addr,
2062 const u8 *buf, size_t len)
2064 struct wpa_tdls_peer *peer;
2065 struct wpa_eapol_ie_parse kde;
2066 struct wpa_tdls_ftie *ftie;
2067 struct wpa_tdls_timeoutie *timeoutie;
2068 struct wpa_tdls_lnkid *lnkid;
2075 wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Confirm / TPK M3 "
2076 "(Peer " MACSTR ")", MAC2STR(src_addr));
2077 for (peer = sm->tdls; peer; peer = peer->next) {
2078 if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
2082 wpa_printf(MSG_INFO, "TDLS: No matching peer found for "
2083 "TPK M3: " MACSTR, MAC2STR(src_addr));
2086 wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_RESPONSE);
2091 pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
2093 status = WPA_GET_LE16(pos);
2096 wpa_printf(MSG_INFO, "TDLS: Status code in TPK M3: %u",
2100 pos += 2 /* status code */ + 1 /* dialog token */;
2102 ielen = len - (pos - buf); /* start of IE in buf */
2103 if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) {
2104 wpa_printf(MSG_INFO, "TDLS: Failed to parse KDEs in TPK M3");
2108 if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
2109 wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TPK M3");
2112 wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M3",
2113 (u8 *) kde.lnkid, kde.lnkid_len);
2114 lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
2116 if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
2117 wpa_printf(MSG_INFO, "TDLS: TPK M3 from diff BSS");
2121 if (!wpa_tdls_get_privacy(sm))
2124 if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
2125 wpa_printf(MSG_INFO, "TDLS: No FTIE in TPK M3");
2128 wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M3",
2129 kde.ftie, sizeof(*ftie));
2130 ftie = (struct wpa_tdls_ftie *) kde.ftie;
2132 if (kde.rsn_ie == NULL) {
2133 wpa_printf(MSG_INFO, "TDLS: No RSN IE in TPK M3");
2136 wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M3",
2137 kde.rsn_ie, kde.rsn_ie_len);
2138 if (kde.rsn_ie_len != peer->rsnie_p_len ||
2139 os_memcmp(kde.rsn_ie, peer->rsnie_p, peer->rsnie_p_len) != 0) {
2140 wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M3 does not match "
2141 "with the one sent in TPK M2");
2145 if (!os_memcmp(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN) == 0) {
2146 wpa_printf(MSG_INFO, "TDLS: FTIE ANonce in TPK M3 does "
2147 "not match with FTIE ANonce used in TPK M2");
2151 if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
2152 wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M3 does not "
2153 "match with FTIE SNonce used in TPK M1");
2157 if (kde.key_lifetime == NULL) {
2158 wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M3");
2161 timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
2162 wpa_hexdump(MSG_DEBUG, "TDLS: Timeout IE Received from TPK M3",
2163 (u8 *) timeoutie, sizeof(*timeoutie));
2164 lifetime = WPA_GET_LE32(timeoutie->value);
2165 wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M3",
2167 if (lifetime != peer->lifetime) {
2168 wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
2169 "TPK M3 (expected %u)", lifetime, peer->lifetime);
2173 if (wpa_supplicant_verify_tdls_mic(3, peer, (u8 *) lnkid,
2174 (u8 *) timeoutie, ftie) < 0) {
2175 wpa_tdls_del_key(sm, peer);
2179 if (wpa_tdls_set_key(sm, peer) < 0) {
2181 * Some drivers may not be able to config the key prior to full
2182 * STA entry having been configured.
2184 wpa_printf(MSG_DEBUG, "TDLS: Try to configure TPK again after "
2185 "STA entry is complete");
2186 peer->reconfig_key = 1;
2190 ret = wpa_tdls_enable_link(sm, peer);
2192 wpa_printf(MSG_DEBUG, "TDLS: Could not enable link");
2193 wpa_tdls_do_teardown(sm, peer,
2194 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, 1);
2198 wpa_tdls_disable_link(sm, peer->addr);
2203 static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs)
2205 struct wpa_tdls_timeoutie *lifetime = (struct wpa_tdls_timeoutie *) ie;
2207 os_memset(lifetime, 0, ie_len);
2208 lifetime->ie_type = WLAN_EID_TIMEOUT_INTERVAL;
2209 lifetime->ie_len = sizeof(struct wpa_tdls_timeoutie) - 2;
2210 lifetime->interval_type = WLAN_TIMEOUT_KEY_LIFETIME;
2211 WPA_PUT_LE32(lifetime->value, tsecs);
2212 os_memcpy(pos, ie, ie_len);
2213 return pos + ie_len;
2218 * wpa_tdls_start - Initiate TDLS handshake (send TPK Handshake Message 1)
2219 * @sm: Pointer to WPA state machine data from wpa_sm_init()
2220 * @peer: MAC address of the peer STA
2221 * Returns: 0 on success, or -1 on failure
2223 * Send TPK Handshake Message 1 info to driver to start TDLS
2224 * handshake with the peer.
2226 int wpa_tdls_start(struct wpa_sm *sm, const u8 *addr)
2228 struct wpa_tdls_peer *peer;
2229 int tdls_prohibited = sm->tdls_prohibited;
2231 if (sm->tdls_disabled || !sm->tdls_supported)
2234 #ifdef CONFIG_TDLS_TESTING
2235 if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
2237 wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
2239 tdls_prohibited = 0;
2241 #endif /* CONFIG_TDLS_TESTING */
2243 if (tdls_prohibited) {
2244 wpa_printf(MSG_DEBUG, "TDLS: TDLS is prohibited in this BSS - "
2245 "reject request to start setup");
2249 peer = wpa_tdls_add_peer(sm, addr, NULL);
2253 peer->initiator = 1;
2255 /* add the peer to the driver as a "setup in progress" peer */
2256 wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, 0, NULL, 0, NULL, NULL, 0,
2259 if (wpa_tdls_send_tpk_m1(sm, peer) < 0) {
2260 wpa_tdls_disable_link(sm, peer->addr);
2268 void wpa_tdls_remove(struct wpa_sm *sm, const u8 *addr)
2270 struct wpa_tdls_peer *peer;
2272 if (sm->tdls_disabled || !sm->tdls_supported)
2275 for (peer = sm->tdls; peer; peer = peer->next) {
2276 if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
2280 if (peer == NULL || !peer->tpk_success)
2283 if (sm->tdls_external_setup) {
2285 * Disable previous link to allow renegotiation to be completed
2288 wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
2294 * wpa_supplicant_rx_tdls - Receive TDLS data frame
2296 * This function is called to receive TDLS (ethertype = 0x890d) data frames.
2298 static void wpa_supplicant_rx_tdls(void *ctx, const u8 *src_addr,
2299 const u8 *buf, size_t len)
2301 struct wpa_sm *sm = ctx;
2302 struct wpa_tdls_frame *tf;
2304 wpa_hexdump(MSG_DEBUG, "TDLS: Received Data frame encapsulation",
2307 if (sm->tdls_disabled || !sm->tdls_supported) {
2308 wpa_printf(MSG_DEBUG, "TDLS: Discard message - TDLS disabled "
2309 "or unsupported by driver");
2313 if (os_memcmp(src_addr, sm->own_addr, ETH_ALEN) == 0) {
2314 wpa_printf(MSG_DEBUG, "TDLS: Discard copy of own message");
2318 if (len < sizeof(*tf)) {
2319 wpa_printf(MSG_INFO, "TDLS: Drop too short frame");
2323 /* Check to make sure its a valid encapsulated TDLS frame */
2324 tf = (struct wpa_tdls_frame *) buf;
2325 if (tf->payloadtype != 2 /* TDLS_RFTYPE */ ||
2326 tf->category != WLAN_ACTION_TDLS) {
2327 wpa_printf(MSG_INFO, "TDLS: Invalid frame - payloadtype=%u "
2328 "category=%u action=%u",
2329 tf->payloadtype, tf->category, tf->action);
2333 switch (tf->action) {
2334 case WLAN_TDLS_SETUP_REQUEST:
2335 wpa_tdls_process_tpk_m1(sm, src_addr, buf, len);
2337 case WLAN_TDLS_SETUP_RESPONSE:
2338 wpa_tdls_process_tpk_m2(sm, src_addr, buf, len);
2340 case WLAN_TDLS_SETUP_CONFIRM:
2341 wpa_tdls_process_tpk_m3(sm, src_addr, buf, len);
2343 case WLAN_TDLS_TEARDOWN:
2344 wpa_tdls_recv_teardown(sm, src_addr, buf, len);
2346 case WLAN_TDLS_DISCOVERY_REQUEST:
2347 wpa_tdls_process_discovery_request(sm, src_addr, buf, len);
2350 /* Kernel code will process remaining frames */
2351 wpa_printf(MSG_DEBUG, "TDLS: Ignore TDLS frame action code %u",
2359 * wpa_tdls_init - Initialize driver interface parameters for TDLS
2360 * @wpa_s: Pointer to wpa_supplicant data
2361 * Returns: 0 on success, -1 on failure
2363 * This function is called to initialize driver interface parameters for TDLS.
2364 * wpa_drv_init() must have been called before this function to initialize the
2367 int wpa_tdls_init(struct wpa_sm *sm)
2372 sm->l2_tdls = l2_packet_init(sm->bridge_ifname ? sm->bridge_ifname :
2375 ETH_P_80211_ENCAP, wpa_supplicant_rx_tdls,
2377 if (sm->l2_tdls == NULL) {
2378 wpa_printf(MSG_ERROR, "TDLS: Failed to open l2_packet "
2384 * Drivers that support TDLS but don't implement the get_capa callback
2385 * are assumed to perform everything internally
2387 if (wpa_sm_tdls_get_capa(sm, &sm->tdls_supported,
2388 &sm->tdls_external_setup) < 0) {
2389 sm->tdls_supported = 1;
2390 sm->tdls_external_setup = 0;
2393 wpa_printf(MSG_DEBUG, "TDLS: TDLS operation%s supported by "
2394 "driver", sm->tdls_supported ? "" : " not");
2395 wpa_printf(MSG_DEBUG, "TDLS: Driver uses %s link setup",
2396 sm->tdls_external_setup ? "external" : "internal");
2402 void wpa_tdls_teardown_peers(struct wpa_sm *sm)
2404 struct wpa_tdls_peer *peer;
2408 wpa_printf(MSG_DEBUG, "TDLS: Tear down peers");
2411 wpa_printf(MSG_DEBUG, "TDLS: Tear down peer " MACSTR,
2412 MAC2STR(peer->addr));
2413 if (sm->tdls_external_setup)
2414 wpa_tdls_send_teardown(sm, peer->addr,
2415 WLAN_REASON_DEAUTH_LEAVING);
2417 wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
2424 static void wpa_tdls_remove_peers(struct wpa_sm *sm)
2426 struct wpa_tdls_peer *peer, *tmp;
2434 res = wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
2435 wpa_printf(MSG_DEBUG, "TDLS: Remove peer " MACSTR " (res=%d)",
2436 MAC2STR(peer->addr), res);
2437 wpa_tdls_peer_free(sm, peer);
2445 * wpa_tdls_deinit - Deinitialize driver interface parameters for TDLS
2447 * This function is called to recover driver interface parameters for TDLS
2448 * and frees resources allocated for it.
2450 void wpa_tdls_deinit(struct wpa_sm *sm)
2456 l2_packet_deinit(sm->l2_tdls);
2459 wpa_tdls_remove_peers(sm);
2463 void wpa_tdls_assoc(struct wpa_sm *sm)
2465 wpa_printf(MSG_DEBUG, "TDLS: Remove peers on association");
2466 wpa_tdls_remove_peers(sm);
2470 void wpa_tdls_disassoc(struct wpa_sm *sm)
2472 wpa_printf(MSG_DEBUG, "TDLS: Remove peers on disassociation");
2473 wpa_tdls_remove_peers(sm);
2477 static int wpa_tdls_prohibited(const u8 *ies, size_t len)
2479 struct wpa_eapol_ie_parse elems;
2484 if (wpa_supplicant_parse_ies(ies, len, &elems) < 0)
2487 if (elems.ext_capab == NULL || elems.ext_capab_len < 2 + 5)
2490 /* bit 38 - TDLS Prohibited */
2491 return !!(elems.ext_capab[2 + 4] & 0x40);
2495 void wpa_tdls_ap_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
2497 sm->tdls_prohibited = wpa_tdls_prohibited(ies, len);
2498 wpa_printf(MSG_DEBUG, "TDLS: TDLS is %s in the target BSS",
2499 sm->tdls_prohibited ? "prohibited" : "allowed");
2503 void wpa_tdls_assoc_resp_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
2505 if (!sm->tdls_prohibited && wpa_tdls_prohibited(ies, len)) {
2506 wpa_printf(MSG_DEBUG, "TDLS: TDLS prohibited based on "
2507 "(Re)Association Response IEs");
2508 sm->tdls_prohibited = 1;
2513 void wpa_tdls_enable(struct wpa_sm *sm, int enabled)
2515 wpa_printf(MSG_DEBUG, "TDLS: %s", enabled ? "enabled" : "disabled");
2516 sm->tdls_disabled = !enabled;
2520 int wpa_tdls_is_external_setup(struct wpa_sm *sm)
2522 return sm->tdls_external_setup;