* wpa_supplicant - TDLS
* Copyright (c) 2010-2011, Atheros Communications
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "utils/includes.h"
#define TDLS_TESTING_SHORT_LIFETIME BIT(3)
#define TDLS_TESTING_WRONG_LIFETIME_RESP BIT(4)
#define TDLS_TESTING_WRONG_LIFETIME_CONF BIT(5)
+#define TDLS_TESTING_LONG_LIFETIME BIT(6)
+#define TDLS_TESTING_CONCURRENT_INIT BIT(7)
+#define TDLS_TESTING_NO_TPK_EXPIRATION BIT(8)
+#define TDLS_TESTING_DECLINE_RESP BIT(9)
+#define TDLS_TESTING_IGNORE_AP_PROHIBIT BIT(10)
+#define TDLS_TESTING_WRONG_MIC BIT(11)
unsigned int tdls_testing = 0;
#endif /* CONFIG_TDLS_TESTING */
#define TPK_LIFETIME 43200 /* 12 hours */
-#define TPK_RETRY_COUNT 3
-#define TPK_TIMEOUT 5000 /* in milliseconds */
+#define TPK_M1_RETRY_COUNT 3
+#define TPK_M1_TIMEOUT 5000 /* in milliseconds */
+#define TPK_M2_RETRY_COUNT 10
+#define TPK_M2_TIMEOUT 500 /* in milliseconds */
#define TDLS_MIC_LEN 16
static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs);
static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx);
static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer);
+static void wpa_tdls_disable_peer_link(struct wpa_sm *sm,
+ struct wpa_tdls_peer *peer);
+static int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr,
+ u16 reason_code);
#define TDLS_MAX_IE_LEN 80
+#define IEEE80211_MAX_SUPP_RATES 32
+
struct wpa_tdls_peer {
struct wpa_tdls_peer *next;
+ unsigned int reconfig_key:1;
int initiator; /* whether this end was initiator for TDLS setup */
u8 addr[ETH_ALEN]; /* other end MAC address */
u8 inonce[WPA_NONCE_LEN]; /* Initiator Nonce */
} tpk;
int tpk_set;
int tpk_success;
+ int tpk_in_progress;
struct tpk_timer {
u8 dest[ETH_ALEN];
u8 action_code; /* TDLS frame type */
u8 dialog_token;
u16 status_code;
+ u32 peer_capab;
int buf_len; /* length of TPK message for retransmission */
u8 *buf; /* buffer for TPK message */
} sm_tmr;
+
+ u16 capability;
+
+ u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
+ size_t supp_rates_len;
+
+ struct ieee80211_ht_capabilities *ht_capabilities;
+ struct ieee80211_vht_capabilities *vht_capabilities;
+
+ u8 qos_info;
+
+ u16 aid;
+
+ u8 *ext_capab;
+ size_t ext_capab_len;
+
+ u8 *supp_channels;
+ size_t supp_channels_len;
+
+ u8 *supp_oper_classes;
+ size_t supp_oper_classes_len;
+
+ u8 wmm_capable;
};
{
if (wpa_sm_set_key(sm, WPA_ALG_NONE, peer->addr,
0, 0, NULL, 0, NULL, 0) < 0) {
- wpa_printf(MSG_WARNING, "TDLS: Failed to delete PTK-TK from "
+ wpa_printf(MSG_WARNING, "TDLS: Failed to delete TPK-TK from "
"the driver");
return -1;
}
static int wpa_tdls_send_tpk_msg(struct wpa_sm *sm, const u8 *dst,
u8 action_code, u8 dialog_token,
- u16 status_code, const u8 *buf, size_t len)
+ u16 status_code, u32 peer_capab,
+ const u8 *buf, size_t len)
{
return wpa_sm_send_tdls_mgmt(sm, dst, action_code, dialog_token,
- status_code, buf, len);
+ status_code, peer_capab, buf, len);
}
static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code,
- u8 dialog_token, u16 status_code,
+ u8 dialog_token, u16 status_code, u32 peer_capab,
const u8 *msg, size_t msg_len)
{
struct wpa_tdls_peer *peer;
wpa_printf(MSG_DEBUG, "TDLS: TPK send dest=" MACSTR " action_code=%u "
- "dialog_token=%u status_code=%u msg_len=%u",
+ "dialog_token=%u status_code=%u peer_capab=%u msg_len=%u",
MAC2STR(dest), action_code, dialog_token, status_code,
- (unsigned int) msg_len);
+ peer_capab, (unsigned int) msg_len);
if (wpa_tdls_send_tpk_msg(sm, dest, action_code, dialog_token,
- status_code, msg, msg_len)) {
+ status_code, peer_capab, msg, msg_len)) {
wpa_printf(MSG_INFO, "TDLS: Failed to send message "
"(action_code=%u)", action_code);
return -1;
}
if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
- action_code == WLAN_TDLS_TEARDOWN)
+ action_code == WLAN_TDLS_TEARDOWN ||
+ action_code == WLAN_TDLS_DISCOVERY_REQUEST ||
+ action_code == WLAN_TDLS_DISCOVERY_RESPONSE)
return 0; /* No retries */
for (peer = sm->tdls; peer; peer = peer->next) {
eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
- peer->sm_tmr.count = TPK_RETRY_COUNT;
- peer->sm_tmr.timer = TPK_TIMEOUT;
+ if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
+ peer->sm_tmr.count = TPK_M2_RETRY_COUNT;
+ peer->sm_tmr.timer = TPK_M2_TIMEOUT;
+ } else {
+ peer->sm_tmr.count = TPK_M1_RETRY_COUNT;
+ peer->sm_tmr.timer = TPK_M1_TIMEOUT;
+ }
/* Copy message to resend on timeout */
os_memcpy(peer->sm_tmr.dest, dest, ETH_ALEN);
peer->sm_tmr.action_code = action_code;
peer->sm_tmr.dialog_token = dialog_token;
peer->sm_tmr.status_code = status_code;
+ peer->sm_tmr.peer_capab = peer_capab;
peer->sm_tmr.buf_len = msg_len;
os_free(peer->sm_tmr.buf);
peer->sm_tmr.buf = os_malloc(msg_len);
wpa_printf(MSG_DEBUG, "TDLS: Retry timeout registered "
"(action_code=%u)", action_code);
- eloop_register_timeout(peer->sm_tmr.timer / 1000, 0,
+ eloop_register_timeout(peer->sm_tmr.timer / 1000,
+ (peer->sm_tmr.timer % 1000) * 1000,
wpa_tdls_tpk_retry_timeout, sm, peer);
return 0;
}
-static void tdls_clear_peer(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+static int wpa_tdls_do_teardown(struct wpa_sm *sm, struct wpa_tdls_peer *peer,
+ u16 reason_code)
{
- u8 mac[ETH_ALEN];
- struct wpa_tdls_peer *tmp;
-
- os_memcpy(mac, peer->addr, ETH_ALEN);
- tmp = peer->next;
- peer->initiator = 0;
- eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
- os_free(peer->sm_tmr.buf);
+ int ret;
- /* reset all */
- os_memset(peer, 0, sizeof(*peer));
+ ret = wpa_tdls_send_teardown(sm, peer->addr, reason_code);
+ /* disable the link after teardown was sent */
+ wpa_tdls_disable_peer_link(sm, peer);
- /* restore things */
- os_memcpy(peer->addr, mac, ETH_ALEN);
- peer->next = tmp;
+ return ret;
}
if (peer->sm_tmr.count) {
peer->sm_tmr.count--;
- peer->sm_tmr.timer = TPK_TIMEOUT;
wpa_printf(MSG_INFO, "TDLS: Retrying sending of message "
"(action_code=%u)",
peer->sm_tmr.action_code,
peer->sm_tmr.dialog_token,
peer->sm_tmr.status_code,
+ peer->sm_tmr.peer_capab,
peer->sm_tmr.buf,
peer->sm_tmr.buf_len)) {
wpa_printf(MSG_INFO, "TDLS: Failed to retry "
}
eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
- eloop_register_timeout(peer->sm_tmr.timer / 1000, 0,
+ eloop_register_timeout(peer->sm_tmr.timer / 1000,
+ (peer->sm_tmr.timer % 1000) * 1000,
wpa_tdls_tpk_retry_timeout, sm, peer);
} else {
- wpa_printf(MSG_INFO, "Sending Tear_Down Request");
- wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
-
- wpa_printf(MSG_INFO, "Clearing SM: Peerkey(" MACSTR ")",
- MAC2STR(peer->addr));
eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
- /* clear the Peerkey statemachine */
- wpa_tdls_peer_free(sm, peer);
+ wpa_printf(MSG_DEBUG, "TDLS: Sending Teardown Request");
+ wpa_tdls_do_teardown(sm, peer,
+ WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
}
}
} else {
wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR
" - tear down", MAC2STR(peer->addr));
- wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
+ wpa_tdls_do_teardown(sm, peer,
+ WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
}
}
-static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+static void wpa_tdls_peer_remove_from_list(struct wpa_sm *sm,
+ struct wpa_tdls_peer *peer)
+{
+ struct wpa_tdls_peer *cur, *prev;
+
+ cur = sm->tdls;
+ prev = NULL;
+ while (cur && cur != peer) {
+ prev = cur;
+ cur = cur->next;
+ }
+
+ if (cur != peer) {
+ wpa_printf(MSG_ERROR, "TDLS: Could not find peer " MACSTR
+ " to remove it from the list",
+ MAC2STR(peer->addr));
+ return;
+ }
+
+ if (prev)
+ prev->next = peer->next;
+ else
+ sm->tdls = peer->next;
+}
+
+
+static void wpa_tdls_peer_clear(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
{
+ wpa_printf(MSG_DEBUG, "TDLS: Clear state for peer " MACSTR,
+ MAC2STR(peer->addr));
eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
+ eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer);
+ peer->reconfig_key = 0;
+ peer->initiator = 0;
+ peer->tpk_in_progress = 0;
+ os_free(peer->sm_tmr.buf);
+ peer->sm_tmr.buf = NULL;
+ os_free(peer->ht_capabilities);
+ peer->ht_capabilities = NULL;
+ os_free(peer->vht_capabilities);
+ peer->vht_capabilities = NULL;
+ os_free(peer->ext_capab);
+ peer->ext_capab = NULL;
+ os_free(peer->supp_channels);
+ peer->supp_channels = NULL;
+ os_free(peer->supp_oper_classes);
+ peer->supp_oper_classes = NULL;
+ peer->rsnie_i_len = peer->rsnie_p_len = 0;
+ peer->cipher = 0;
+ peer->qos_info = 0;
+ peer->wmm_capable = 0;
+ peer->tpk_set = peer->tpk_success = 0;
+ os_memset(&peer->tpk, 0, sizeof(peer->tpk));
+ os_memset(peer->inonce, 0, WPA_NONCE_LEN);
+ os_memset(peer->rnonce, 0, WPA_NONCE_LEN);
+}
- /* need to clear Peerkey SM */
- tdls_clear_peer(sm, peer);
- //os_free(peer);
+
+static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+{
+ wpa_tdls_peer_clear(sm, peer);
+ wpa_tdls_peer_remove_from_list(sm, peer);
+ os_free(peer);
}
}
-int wpa_tdls_recv_teardown_notify(struct wpa_sm *sm, const u8 *addr,
+static int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr,
u16 reason_code)
{
struct wpa_tdls_peer *peer;
u8 *rbuf, *pos;
int ielen;
+ if (sm->tdls_disabled || !sm->tdls_supported)
+ return -1;
+
/* Find the node and free from the list */
for (peer = sm->tdls; peer; peer = peer->next) {
if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
ftie->ie_len += 170;
*pos++ = 255; /* FTIE subelem */
*pos++ = 168; /* FTIE subelem length */
+ pos += 168;
}
#endif /* CONFIG_TDLS_TESTING */
wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TDLS Teardown handshake",
- (u8 *) ftie, sizeof(*ftie));
+ (u8 *) ftie, pos - (u8 *) ftie);
/* compute MIC before sending */
wpa_tdls_linkid(sm, peer, &lnkid);
/* request driver to send Teardown using this FTIE */
wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_TEARDOWN, 0,
- WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED, rbuf,
- pos - rbuf);
+ reason_code, 0, rbuf, pos - rbuf);
os_free(rbuf);
- /* clear the Peerkey statemachine */
+ return 0;
+}
+
+
+int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code)
+{
+ struct wpa_tdls_peer *peer;
+
+ if (sm->tdls_disabled || !sm->tdls_supported)
+ return -1;
+
+ for (peer = sm->tdls; peer; peer = peer->next) {
+ if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+ break;
+ }
+
+ if (peer == NULL) {
+ wpa_printf(MSG_DEBUG, "TDLS: Could not find peer " MACSTR
+ " for link Teardown", MAC2STR(addr));
+ return -1;
+ }
+
+ if (!peer->tpk_success) {
+ wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR
+ " not connected - cannot Teardown link", MAC2STR(addr));
+ return -1;
+ }
+
+ return wpa_tdls_do_teardown(sm, peer, reason_code);
+}
+
+
+static void wpa_tdls_disable_peer_link(struct wpa_sm *sm,
+ struct wpa_tdls_peer *peer)
+{
+ wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
wpa_tdls_peer_free(sm, peer);
+}
- return 0;
+
+void wpa_tdls_disable_unreachable_link(struct wpa_sm *sm, const u8 *addr)
+{
+ struct wpa_tdls_peer *peer;
+
+ for (peer = sm->tdls; peer; peer = peer->next) {
+ if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+ break;
+ }
+
+ if (!peer || !peer->tpk_success) {
+ wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR
+ " not connected - cannot teardown unreachable link",
+ MAC2STR(addr));
+ return;
+ }
+
+ if (wpa_tdls_is_external_setup(sm)) {
+ /*
+ * Disable the link, send a teardown packet through the
+ * AP, and then reset link data.
+ */
+ wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, addr);
+ wpa_tdls_send_teardown(sm, addr,
+ WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE);
+ wpa_tdls_peer_free(sm, peer);
+ } else {
+ wpa_tdls_disable_peer_link(sm, peer);
+ }
+}
+
+
+const char * wpa_tdls_get_link_status(struct wpa_sm *sm, const u8 *addr)
+{
+ struct wpa_tdls_peer *peer;
+
+ if (sm->tdls_disabled || !sm->tdls_supported)
+ return "disabled";
+
+ for (peer = sm->tdls; peer; peer = peer->next) {
+ if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+ break;
+ }
+
+ if (peer == NULL)
+ return "peer does not exist";
+
+ if (!peer->tpk_success)
+ return "peer not connected";
+
+ return "connected";
}
if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success)
goto skip_ftie;
- if (kde.ftie == NULL) {
+ if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
wpa_printf(MSG_INFO, "TDLS: No FTIE in TDLS Teardown");
return -1;
}
(u8 *) lnkid, ftie) < 0) {
wpa_printf(MSG_DEBUG, "TDLS: MIC failure for TDLS "
"Teardown Request from " MACSTR, MAC2STR(src_addr));
-#if 0
return -1;
-#else
- /* TODO: figure out whether this workaround could be disabled
- */
- wpa_printf(MSG_DEBUG, "TDLS: Workaround - ignore Teardown MIC "
- "failure");
-#endif
}
skip_ftie:
* Request the driver to disable the direct link and clear associated
* keys.
*/
- wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, src_addr);
-
- /* clear the Peerkey statemachine */
- wpa_tdls_peer_free(sm, peer);
-
+ wpa_tdls_disable_peer_link(sm, peer);
return 0;
}
static int wpa_tdls_send_error(struct wpa_sm *sm, const u8 *dst,
u8 tdls_action, u8 dialog_token, u16 status)
{
+ wpa_printf(MSG_DEBUG, "TDLS: Sending error to " MACSTR
+ " (action=%u status=%u)",
+ MAC2STR(dst), tdls_action, status);
return wpa_tdls_tpk_send(sm, dst, tdls_action, dialog_token, status,
- NULL, 0);
+ 0, NULL, 0);
+}
+
+
+static struct wpa_tdls_peer *
+wpa_tdls_add_peer(struct wpa_sm *sm, const u8 *addr, int *existing)
+{
+ struct wpa_tdls_peer *peer;
+
+ if (existing)
+ *existing = 0;
+ for (peer = sm->tdls; peer; peer = peer->next) {
+ if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0) {
+ if (existing)
+ *existing = 1;
+ return peer; /* re-use existing entry */
+ }
+ }
+
+ wpa_printf(MSG_INFO, "TDLS: Creating peer entry for " MACSTR,
+ MAC2STR(addr));
+
+ peer = os_zalloc(sizeof(*peer));
+ if (peer == NULL)
+ return NULL;
+
+ os_memcpy(peer->addr, addr, ETH_ALEN);
+ peer->next = sm->tdls;
+ sm->tdls = peer;
+
+ return peer;
}
u8 *rbuf, *pos, *count_pos;
u16 count;
struct rsn_ie_hdr *hdr;
+ int status;
if (!wpa_tdls_get_privacy(sm)) {
wpa_printf(MSG_DEBUG, "TDLS: No security used on the link");
"lifetime");
peer->lifetime = 301;
}
+ if (tdls_testing & TDLS_TESTING_LONG_LIFETIME) {
+ wpa_printf(MSG_DEBUG, "TDLS: Testing - use long TPK "
+ "lifetime");
+ peer->lifetime = 0xffffffff;
+ }
#endif /* CONFIG_TDLS_TESTING */
pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie,
sizeof(timeoutie), peer->lifetime);
"Handshake Message 1 (peer " MACSTR ")",
MAC2STR(peer->addr));
- wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST, 0, 0,
- rbuf, pos - rbuf);
+ status = wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST,
+ 1, 0, 0, rbuf, pos - rbuf);
os_free(rbuf);
- return 0;
+ return status;
}
u32 lifetime;
struct wpa_tdls_timeoutie timeoutie;
struct wpa_tdls_ftie *ftie;
+ int status;
buf_len = 0;
if (wpa_tdls_get_privacy(sm)) {
/* compute MIC before sending */
wpa_tdls_ftie_mic(peer->tpk.kck, 2, (u8 *) lnkid, peer->rsnie_p,
(u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
+#ifdef CONFIG_TDLS_TESTING
+ if (tdls_testing & TDLS_TESTING_WRONG_MIC) {
+ wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong MIC");
+ ftie->mic[0] ^= 0x01;
+ }
+#endif /* CONFIG_TDLS_TESTING */
skip_ies:
- wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken, 0,
- rbuf, pos - rbuf);
+ status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE,
+ dtoken, 0, 0, rbuf, pos - rbuf);
os_free(rbuf);
- return 0;
+ return status;
}
struct wpa_tdls_ftie *ftie;
struct wpa_tdls_timeoutie timeoutie;
u32 lifetime;
+ int status;
+ u32 peer_capab = 0;
buf_len = 0;
if (wpa_tdls_get_privacy(sm)) {
/* compute MIC before sending */
wpa_tdls_ftie_mic(peer->tpk.kck, 3, (u8 *) lnkid, peer->rsnie_p,
(u8 *) &timeoutie, (u8 *) ftie, ftie->mic);
+#ifdef CONFIG_TDLS_TESTING
+ if (tdls_testing & TDLS_TESTING_WRONG_MIC) {
+ wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong MIC");
+ ftie->mic[0] ^= 0x01;
+ }
+#endif /* CONFIG_TDLS_TESTING */
skip_ies:
- wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken, 0,
- rbuf, pos - rbuf);
+
+ if (peer->vht_capabilities)
+ peer_capab |= TDLS_PEER_VHT;
+ if (peer->ht_capabilities)
+ peer_capab |= TDLS_PEER_HT;
+ if (peer->wmm_capable)
+ peer_capab |= TDLS_PEER_WMM;
+
+ status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM,
+ dtoken, 0, peer_capab, rbuf, pos - rbuf);
os_free(rbuf);
- return 0;
+ return status;
}
-static int wpa_tdls_process_tpk_m1(struct wpa_sm *sm, const u8 *src_addr,
- const u8 *buf, size_t len)
+static int wpa_tdls_send_discovery_response(struct wpa_sm *sm,
+ struct wpa_tdls_peer *peer,
+ u8 dialog_token)
{
- struct wpa_tdls_peer *peer;
- struct wpa_eapol_ie_parse kde;
- struct wpa_ie_data ie;
- int cipher;
- const u8 *cpos;
- struct wpa_tdls_ftie *ftie = NULL;
- struct wpa_tdls_timeoutie *timeoutie;
- struct wpa_tdls_lnkid *lnkid;
- u32 lifetime = 0;
-#if 0
- struct rsn_ie_hdr *hdr;
- u8 *pos;
- u16 rsn_capab;
- u16 rsn_ver;
-#endif
- u8 dtoken;
- u16 ielen;
+ wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Discovery Response "
+ "(peer " MACSTR ")", MAC2STR(peer->addr));
- cpos = buf;
- cpos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
+ return wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_DISCOVERY_RESPONSE,
+ dialog_token, 0, 0, NULL, 0);
+}
- /* driver had already verified the frame format */
- dtoken = *cpos++; /* dialog token */
- wpa_printf(MSG_INFO, "TDLS: Dialog Token in TPK M1 %d", dtoken);
+static int
+wpa_tdls_process_discovery_request(struct wpa_sm *sm, const u8 *addr,
+ const u8 *buf, size_t len)
+{
+ struct wpa_eapol_ie_parse kde;
+ const struct wpa_tdls_lnkid *lnkid;
+ struct wpa_tdls_peer *peer;
+ size_t min_req_len = sizeof(struct wpa_tdls_frame) +
+ 1 /* dialog token */ + sizeof(struct wpa_tdls_lnkid);
+ u8 dialog_token;
- cpos += 2; /* capability information */
+ wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from " MACSTR,
+ MAC2STR(addr));
- ielen = len - (cpos - buf); /* start of IE in buf */
- if (wpa_supplicant_parse_ies(cpos, ielen, &kde) < 0) {
- wpa_printf(MSG_INFO, "TDLS: Failed to parse KDEs in TPK M1");
+ if (len < min_req_len) {
+ wpa_printf(MSG_DEBUG, "TDLS Discovery Request is too short: "
+ "%d", (int) len);
return -1;
}
- if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
- wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TPK M1");
- return -1;
+ dialog_token = buf[sizeof(struct wpa_tdls_frame)];
+
+ /*
+ * Some APs will tack on a weird IE to the end of a TDLS
+ * discovery request packet. This needn't fail the response,
+ * since the required IE are verified separately.
+ */
+ if (wpa_supplicant_parse_ies(buf + sizeof(struct wpa_tdls_frame) + 1,
+ len - (sizeof(struct wpa_tdls_frame) + 1),
+ &kde) < 0) {
+ wpa_printf(MSG_DEBUG,
+ "TDLS: Failed to parse IEs in Discovery Request - ignore as an interop workaround");
}
- lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
- if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
- wpa_printf(MSG_INFO, "TDLS: TPK M1 from diff BSS");
- wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE,
- dtoken, WLAN_STATUS_NOT_IN_SAME_BSS);
+
+ if (!kde.lnkid) {
+ wpa_printf(MSG_DEBUG, "TDLS: Link ID not found in Discovery "
+ "Request");
return -1;
}
- wpa_printf(MSG_DEBUG, "TDLS: TPK M1 - TPK initiator " MACSTR,
- MAC2STR(src_addr));
-
- if (!wpa_tdls_get_privacy(sm))
- goto skip_rsn;
+ lnkid = (const struct wpa_tdls_lnkid *) kde.lnkid;
- if (kde.ftie == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No FTIE in TPK M1");
- return -1;
- }
- ftie = (struct wpa_tdls_ftie *) kde.ftie;
- if (kde.rsn_ie == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No RSN IE in TPK M1");
+ if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
+ wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from different "
+ " BSS " MACSTR, MAC2STR(lnkid->bssid));
return -1;
}
- if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) {
- wpa_printf(MSG_INFO, "TDLS: Too long Initiator RSN IE in "
- "TPK M1");
+ peer = wpa_tdls_add_peer(sm, addr, NULL);
+ if (peer == NULL)
return -1;
- }
- if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
- wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M1");
+ return wpa_tdls_send_discovery_response(sm, peer, dialog_token);
+}
+
+
+int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr)
+{
+ if (sm->tdls_disabled || !sm->tdls_supported)
return -1;
- }
- cipher = ie.pairwise_cipher;
- if (cipher & WPA_CIPHER_CCMP) {
- wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
- cipher = WPA_CIPHER_CCMP;
- } else {
- wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M1");
- wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE,
- dtoken,
- WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID);
+ wpa_printf(MSG_DEBUG, "TDLS: Sending Discovery Request to peer "
+ MACSTR, MAC2STR(addr));
+ return wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_DISCOVERY_REQUEST,
+ 1, 0, 0, NULL, 0);
+}
+
+
+static int copy_supp_rates(const struct wpa_eapol_ie_parse *kde,
+ struct wpa_tdls_peer *peer)
+{
+ if (!kde->supp_rates) {
+ wpa_printf(MSG_DEBUG, "TDLS: No supported rates received");
return -1;
}
+ peer->supp_rates_len = merge_byte_arrays(
+ peer->supp_rates, sizeof(peer->supp_rates),
+ kde->supp_rates + 2, kde->supp_rates_len - 2,
+ kde->ext_supp_rates ? kde->ext_supp_rates + 2 : NULL,
+ kde->ext_supp_rates_len - 2);
+ return 0;
+}
-skip_rsn:
- /* Find existing entry and if found, use that instead of adding
- * a new one; how to handle the case where both ends initiate at the
- * same time? */
- for (peer = sm->tdls; peer; peer = peer->next) {
- if (os_memcmp(peer->addr, src_addr, ETH_ALEN) == 0)
- break;
+
+static int copy_peer_ht_capab(const struct wpa_eapol_ie_parse *kde,
+ struct wpa_tdls_peer *peer)
+{
+ if (!kde->ht_capabilities ||
+ kde->ht_capabilities_len <
+ sizeof(struct ieee80211_ht_capabilities) ) {
+ wpa_printf(MSG_DEBUG, "TDLS: No supported ht capabilities "
+ "received");
+ return 0;
}
- if (peer == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
- "peer, creating one for " MACSTR,
- MAC2STR(src_addr));
- peer = os_malloc(sizeof(*peer));
- if (peer == NULL)
- return -1;
- os_memset(peer, 0, sizeof(*peer));
- os_memcpy(peer->addr, src_addr, ETH_ALEN);
- peer->next = sm->tdls;
- sm->tdls = peer;
- } else {
- /*
- * An entry is already present, so check if a TPK_M1 Request
- * had been sent.
- * If so compare MAC address and let
- * - greater MAC continue to be initiator
- * - other MAC be Peer and process the Req.
- */
- if (peer->initiator) {
- if (os_memcmp(sm->own_addr, src_addr, ETH_ALEN) > 0) {
- wpa_printf(MSG_DEBUG, "TDLS: Dropping Request "
- "from peer with smaller address "
- MACSTR, MAC2STR(src_addr));
- return -1;
- } else {
- /*
- * If smaller node then accept the packet,
- * clear values and get ready to process this
- * Req.
- */
- wpa_printf(MSG_DEBUG, "TDLS: Accepting "
- "Request from peer " MACSTR,
- MAC2STR(src_addr));
- /* clear sm info and preserve the list */
- wpa_tdls_peer_free(sm, peer);
- }
- }
+ if (!peer->ht_capabilities) {
+ peer->ht_capabilities =
+ os_zalloc(sizeof(struct ieee80211_ht_capabilities));
+ if (peer->ht_capabilities == NULL)
+ return -1;
}
- peer->initiator = 0; /* Need to check */
- peer->dtoken = dtoken;
+ os_memcpy(peer->ht_capabilities, kde->ht_capabilities,
+ sizeof(struct ieee80211_ht_capabilities));
+ wpa_hexdump(MSG_DEBUG, "TDLS: Peer HT capabilities",
+ (u8 *) peer->ht_capabilities,
+ sizeof(struct ieee80211_ht_capabilities));
- if (!wpa_tdls_get_privacy(sm)) {
- peer->rsnie_i_len = 0;
- peer->rsnie_p_len = 0;
- peer->cipher = WPA_CIPHER_NONE;
- goto skip_rsn_check;
- }
+ return 0;
+}
- os_memcpy(peer->inonce, ftie->Snonce, WPA_NONCE_LEN);
- os_memcpy(peer->rsnie_i, kde.rsn_ie, kde.rsn_ie_len);
- peer->rsnie_i_len = kde.rsn_ie_len;
- peer->cipher = cipher;
- if (os_get_random(peer->rnonce, WPA_NONCE_LEN)) {
- wpa_msg(sm->ctx->ctx, MSG_WARNING,
- "TDLS: Failed to get random data for responder nonce");
- wpa_tdls_peer_free(sm, peer);
- return -1;
+static int copy_peer_vht_capab(const struct wpa_eapol_ie_parse *kde,
+ struct wpa_tdls_peer *peer)
+{
+ if (!kde->vht_capabilities ||
+ kde->vht_capabilities_len <
+ sizeof(struct ieee80211_vht_capabilities) ) {
+ wpa_printf(MSG_DEBUG, "TDLS: No supported vht capabilities "
+ "received");
+ return 0;
}
-#if 0
- /* get version info from RSNIE received from Peer */
- hdr = (struct rsn_ie_hdr *) kde.rsn_ie;
- rsn_ver = WPA_GET_LE16(hdr->version);
+ if (!peer->vht_capabilities) {
+ peer->vht_capabilities =
+ os_zalloc(sizeof(struct ieee80211_vht_capabilities));
+ if (peer->vht_capabilities == NULL)
+ return -1;
+ }
+
+ os_memcpy(peer->vht_capabilities, kde->vht_capabilities,
+ sizeof(struct ieee80211_vht_capabilities));
+ wpa_hexdump(MSG_DEBUG, "TDLS: Peer VHT capabilities",
+ (u8 *) peer->vht_capabilities,
+ sizeof(struct ieee80211_vht_capabilities));
+
+ return 0;
+}
+
+
+static int copy_peer_ext_capab(const struct wpa_eapol_ie_parse *kde,
+ struct wpa_tdls_peer *peer)
+{
+ if (!kde->ext_capab) {
+ wpa_printf(MSG_DEBUG, "TDLS: No extended capabilities "
+ "received");
+ return 0;
+ }
+
+ if (!peer->ext_capab || peer->ext_capab_len < kde->ext_capab_len - 2) {
+ /* Need to allocate buffer to fit the new information */
+ os_free(peer->ext_capab);
+ peer->ext_capab = os_zalloc(kde->ext_capab_len - 2);
+ if (peer->ext_capab == NULL)
+ return -1;
+ }
+
+ peer->ext_capab_len = kde->ext_capab_len - 2;
+ os_memcpy(peer->ext_capab, kde->ext_capab + 2, peer->ext_capab_len);
+
+ return 0;
+}
+
+
+static int copy_peer_wmm_capab(const struct wpa_eapol_ie_parse *kde,
+ struct wpa_tdls_peer *peer)
+{
+ struct wmm_information_element *wmm;
+
+ if (!kde->wmm) {
+ wpa_printf(MSG_DEBUG, "TDLS: No supported WMM capabilities received");
+ return 0;
+ }
+
+ if (kde->wmm_len < sizeof(struct wmm_information_element)) {
+ wpa_printf(MSG_DEBUG, "TDLS: Invalid supported WMM capabilities received");
+ return -1;
+ }
+
+ wmm = (struct wmm_information_element *) kde->wmm;
+ peer->qos_info = wmm->qos_info;
+
+ peer->wmm_capable = 1;
+
+ wpa_printf(MSG_DEBUG, "TDLS: Peer WMM QOS Info 0x%x", peer->qos_info);
+ return 0;
+}
+
+
+static int copy_peer_supp_channels(const struct wpa_eapol_ie_parse *kde,
+ struct wpa_tdls_peer *peer)
+{
+ if (!kde->supp_channels) {
+ wpa_printf(MSG_DEBUG, "TDLS: No supported channels received");
+ return 0;
+ }
+
+ if (!peer->supp_channels ||
+ peer->supp_channels_len < kde->supp_channels_len) {
+ os_free(peer->supp_channels);
+ peer->supp_channels = os_zalloc(kde->supp_channels_len);
+ if (peer->supp_channels == NULL)
+ return -1;
+ }
+
+ peer->supp_channels_len = kde->supp_channels_len;
+
+ os_memcpy(peer->supp_channels, kde->supp_channels,
+ peer->supp_channels_len);
+ wpa_hexdump(MSG_DEBUG, "TDLS: Peer Supported Channels",
+ (u8 *) peer->supp_channels, peer->supp_channels_len);
+ return 0;
+}
+
+
+static int copy_peer_supp_oper_classes(const struct wpa_eapol_ie_parse *kde,
+ struct wpa_tdls_peer *peer)
+{
+ if (!kde->supp_oper_classes) {
+ wpa_printf(MSG_DEBUG, "TDLS: No supported operating classes received");
+ return 0;
+ }
+
+ if (!peer->supp_oper_classes ||
+ peer->supp_oper_classes_len < kde->supp_oper_classes_len) {
+ os_free(peer->supp_oper_classes);
+ peer->supp_oper_classes = os_zalloc(kde->supp_oper_classes_len);
+ if (peer->supp_oper_classes == NULL)
+ return -1;
+ }
+
+ peer->supp_oper_classes_len = kde->supp_oper_classes_len;
+ os_memcpy(peer->supp_oper_classes, kde->supp_oper_classes,
+ peer->supp_oper_classes_len);
+ wpa_hexdump(MSG_DEBUG, "TDLS: Peer Supported Operating Classes",
+ (u8 *) peer->supp_oper_classes,
+ peer->supp_oper_classes_len);
+ return 0;
+}
+
+
+static int wpa_tdls_process_tpk_m1(struct wpa_sm *sm, const u8 *src_addr,
+ const u8 *buf, size_t len)
+{
+ struct wpa_tdls_peer *peer;
+ struct wpa_eapol_ie_parse kde;
+ struct wpa_ie_data ie;
+ int cipher;
+ const u8 *cpos;
+ struct wpa_tdls_ftie *ftie = NULL;
+ struct wpa_tdls_timeoutie *timeoutie;
+ struct wpa_tdls_lnkid *lnkid;
+ u32 lifetime = 0;
+#if 0
+ struct rsn_ie_hdr *hdr;
+ u8 *pos;
+ u16 rsn_capab;
+ u16 rsn_ver;
+#endif
+ u8 dtoken;
+ u16 ielen;
+ u16 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
+ int tdls_prohibited = sm->tdls_prohibited;
+ int existing_peer = 0;
+
+ if (len < 3 + 3)
+ return -1;
+
+ cpos = buf;
+ cpos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
+
+ /* driver had already verified the frame format */
+ dtoken = *cpos++; /* dialog token */
+
+ wpa_printf(MSG_INFO, "TDLS: Dialog Token in TPK M1 %d", dtoken);
+
+ peer = wpa_tdls_add_peer(sm, src_addr, &existing_peer);
+ if (peer == NULL)
+ goto error;
+
+ /* If found, use existing entry instead of adding a new one;
+ * how to handle the case where both ends initiate at the
+ * same time? */
+ if (existing_peer) {
+ if (peer->tpk_success) {
+ wpa_printf(MSG_DEBUG, "TDLS: TDLS Setup Request while "
+ "direct link is enabled - tear down the "
+ "old link first");
+ wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
+ wpa_tdls_peer_clear(sm, peer);
+ } else if (peer->initiator) {
+ /*
+ * An entry is already present, so check if we already
+ * sent a TDLS Setup Request. If so, compare MAC
+ * addresses and let the STA with the lower MAC address
+ * continue as the initiator. The other negotiation is
+ * terminated.
+ */
+ if (os_memcmp(sm->own_addr, src_addr, ETH_ALEN) < 0) {
+ wpa_printf(MSG_DEBUG, "TDLS: Discard request "
+ "from peer with higher address "
+ MACSTR, MAC2STR(src_addr));
+ return -1;
+ } else {
+ wpa_printf(MSG_DEBUG, "TDLS: Accept request "
+ "from peer with lower address "
+ MACSTR " (terminate previously "
+ "initiated negotiation",
+ MAC2STR(src_addr));
+ wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK,
+ peer->addr);
+ wpa_tdls_peer_clear(sm, peer);
+ }
+ }
+ }
+
+ /* capability information */
+ peer->capability = WPA_GET_LE16(cpos);
+ cpos += 2;
+
+ ielen = len - (cpos - buf); /* start of IE in buf */
+ if (wpa_supplicant_parse_ies(cpos, ielen, &kde) < 0) {
+ wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M1");
+ goto error;
+ }
+
+ if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
+ wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
+ "TPK M1");
+ goto error;
+ }
+ wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M1",
+ kde.lnkid, kde.lnkid_len);
+ lnkid = (struct wpa_tdls_lnkid *) kde.lnkid;
+ if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
+ wpa_printf(MSG_INFO, "TDLS: TPK M1 from diff BSS");
+ status = WLAN_STATUS_NOT_IN_SAME_BSS;
+ goto error;
+ }
+
+ wpa_printf(MSG_DEBUG, "TDLS: TPK M1 - TPK initiator " MACSTR,
+ MAC2STR(src_addr));
+
+ if (copy_supp_rates(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_ht_capab(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_vht_capab(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_ext_capab(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_supp_channels(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_supp_oper_classes(&kde, peer) < 0)
+ goto error;
+
+ peer->qos_info = kde.qosinfo;
+
+ /* Overwrite with the qos_info obtained in WMM IE */
+ if (copy_peer_wmm_capab(&kde, peer) < 0)
+ goto error;
+
+ peer->aid = kde.aid;
+
+#ifdef CONFIG_TDLS_TESTING
+ if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) {
+ peer = wpa_tdls_add_peer(sm, src_addr, NULL);
+ if (peer == NULL)
+ goto error;
+ wpa_printf(MSG_DEBUG, "TDLS: Testing concurrent initiation of "
+ "TDLS setup - send own request");
+ peer->initiator = 1;
+ wpa_tdls_send_tpk_m1(sm, peer);
+ }
+
+ if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
+ tdls_prohibited) {
+ wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
+ "on TDLS");
+ tdls_prohibited = 0;
+ }
+#endif /* CONFIG_TDLS_TESTING */
+
+ if (tdls_prohibited) {
+ wpa_printf(MSG_INFO, "TDLS: TDLS prohibited in this BSS");
+ status = WLAN_STATUS_REQUEST_DECLINED;
+ goto error;
+ }
+
+ if (!wpa_tdls_get_privacy(sm)) {
+ if (kde.rsn_ie) {
+ wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M1 while "
+ "security is disabled");
+ status = WLAN_STATUS_SECURITY_DISABLED;
+ goto error;
+ }
+ goto skip_rsn;
+ }
+
+ if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
+ kde.rsn_ie == NULL) {
+ wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M1");
+ status = WLAN_STATUS_INVALID_PARAMETERS;
+ goto error;
+ }
+
+ if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) {
+ wpa_printf(MSG_INFO, "TDLS: Too long Initiator RSN IE in "
+ "TPK M1");
+ status = WLAN_STATUS_INVALID_RSNIE;
+ goto error;
+ }
+
+ if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
+ wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M1");
+ status = WLAN_STATUS_INVALID_RSNIE;
+ goto error;
+ }
+
+ cipher = ie.pairwise_cipher;
+ if (cipher & WPA_CIPHER_CCMP) {
+ wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
+ cipher = WPA_CIPHER_CCMP;
+ } else {
+ wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M1");
+ status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
+ goto error;
+ }
+
+ if ((ie.capabilities &
+ (WPA_CAPABILITY_NO_PAIRWISE | WPA_CAPABILITY_PEERKEY_ENABLED)) !=
+ WPA_CAPABILITY_PEERKEY_ENABLED) {
+ wpa_printf(MSG_INFO, "TDLS: Invalid RSN Capabilities in "
+ "TPK M1");
+ status = WLAN_STATUS_INVALID_RSN_IE_CAPAB;
+ goto error;
+ }
+
+ /* Lifetime */
+ if (kde.key_lifetime == NULL) {
+ wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M1");
+ status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+ goto error;
+ }
+ timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
+ lifetime = WPA_GET_LE32(timeoutie->value);
+ wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", lifetime);
+ if (lifetime < 300) {
+ wpa_printf(MSG_INFO, "TDLS: Too short TPK lifetime");
+ status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+ goto error;
+ }
+
+skip_rsn:
+#ifdef CONFIG_TDLS_TESTING
+ if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) {
+ if (os_memcmp(sm->own_addr, peer->addr, ETH_ALEN) < 0) {
+ /*
+ * The request frame from us is going to win, so do not
+ * replace information based on this request frame from
+ * the peer.
+ */
+ goto skip_rsn_check;
+ }
+ }
+#endif /* CONFIG_TDLS_TESTING */
+
+ peer->initiator = 0; /* Need to check */
+ peer->dtoken = dtoken;
+
+ if (!wpa_tdls_get_privacy(sm)) {
+ peer->rsnie_i_len = 0;
+ peer->rsnie_p_len = 0;
+ peer->cipher = WPA_CIPHER_NONE;
+ goto skip_rsn_check;
+ }
+
+ ftie = (struct wpa_tdls_ftie *) kde.ftie;
+ os_memcpy(peer->rsnie_i, kde.rsn_ie, kde.rsn_ie_len);
+ peer->rsnie_i_len = kde.rsn_ie_len;
+ peer->cipher = cipher;
+
+ if (os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) != 0) {
+ /*
+ * There is no point in updating the RNonce for every obtained
+ * TPK M1 frame (e.g., retransmission due to timeout) with the
+ * same INonce (SNonce in FTIE). However, if the TPK M1 is
+ * retransmitted with a different INonce, update the RNonce
+ * since this is for a new TDLS session.
+ */
+ wpa_printf(MSG_DEBUG,
+ "TDLS: New TPK M1 INonce - generate new RNonce");
+ os_memcpy(peer->inonce, ftie->Snonce, WPA_NONCE_LEN);
+ if (os_get_random(peer->rnonce, WPA_NONCE_LEN)) {
+ wpa_msg(sm->ctx->ctx, MSG_WARNING,
+ "TDLS: Failed to get random data for responder nonce");
+ goto error;
+ }
+ }
+
+#if 0
+ /* get version info from RSNIE received from Peer */
+ hdr = (struct rsn_ie_hdr *) kde.rsn_ie;
+ rsn_ver = WPA_GET_LE16(hdr->version);
/* use min(peer's version, out version) */
if (rsn_ver > RSN_VERSION)
os_memcpy(peer->rsnie_p, peer->rsnie_i, peer->rsnie_i_len);
peer->rsnie_p_len = peer->rsnie_i_len;
- wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for PTK handshake",
+ wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake",
peer->rsnie_p, peer->rsnie_p_len);
- /* Lifetime */
- if (kde.key_lifetime == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M1");
- return -1;
- }
- timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
- lifetime = WPA_GET_LE32(timeoutie->value);
- wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", lifetime);
- if (lifetime < 300)
- lifetime = 300; /* minimum seconds */
peer->lifetime = lifetime;
wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
skip_rsn_check:
+ /* add the peer to the driver as a "setup in progress" peer */
+ if (wpa_sm_tdls_peer_addset(sm, peer->addr, 1, peer->aid,
+ peer->capability,
+ peer->supp_rates, peer->supp_rates_len,
+ peer->ht_capabilities,
+ peer->vht_capabilities,
+ peer->qos_info, peer->ext_capab,
+ peer->ext_capab_len,
+ peer->supp_channels,
+ peer->supp_channels_len,
+ peer->supp_oper_classes,
+ peer->supp_oper_classes_len))
+ goto error;
+
+ peer->tpk_in_progress = 1;
+
wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Response / TPK M2");
- wpa_tdls_send_tpk_m2(sm, src_addr, dtoken, lnkid, peer);
+ if (wpa_tdls_send_tpk_m2(sm, src_addr, dtoken, lnkid, peer) < 0) {
+ wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr);
+ goto error;
+ }
return 0;
+
+error:
+ wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken,
+ status);
+ if (peer)
+ wpa_tdls_peer_free(sm, peer);
+ return -1;
}
-static void wpa_tdls_enable_link(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
+static int wpa_tdls_enable_link(struct wpa_sm *sm, struct wpa_tdls_peer *peer)
{
peer->tpk_success = 1;
+ peer->tpk_in_progress = 0;
eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
if (wpa_tdls_get_privacy(sm)) {
- eloop_register_timeout(peer->lifetime, 0, wpa_tdls_tpk_timeout,
+ u32 lifetime = peer->lifetime;
+ /*
+ * Start the initiator process a bit earlier to avoid race
+ * condition with the responder sending teardown request.
+ */
+ if (lifetime > 3 && peer->initiator)
+ lifetime -= 3;
+ eloop_register_timeout(lifetime, 0, wpa_tdls_tpk_timeout,
sm, peer);
+#ifdef CONFIG_TDLS_TESTING
+ if (tdls_testing & TDLS_TESTING_NO_TPK_EXPIRATION) {
+ wpa_printf(MSG_DEBUG, "TDLS: Testing - disable TPK "
+ "expiration");
+ eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer);
+ }
+#endif /* CONFIG_TDLS_TESTING */
+ }
+
+ if (peer->reconfig_key && wpa_tdls_set_key(sm, peer) < 0) {
+ wpa_printf(MSG_INFO, "TDLS: Could not configure key to the "
+ "driver");
+ return -1;
}
- wpa_sm_tdls_oper(sm, TDLS_ENABLE_LINK, peer->addr);
+ peer->reconfig_key = 0;
+
+ return wpa_sm_tdls_oper(sm, TDLS_ENABLE_LINK, peer->addr);
}
int ielen;
u16 status;
const u8 *pos;
+ int ret = 0;
wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Response / TPK M2 "
"(Peer " MACSTR ")", MAC2STR(src_addr));
"TPK M2: " MACSTR, MAC2STR(src_addr));
return -1;
}
+ if (!peer->initiator) {
+ /*
+ * This may happen if both devices try to initiate TDLS at the
+ * same time and we accept the TPK M1 from the peer in
+ * wpa_tdls_process_tpk_m1() and clear our previous state.
+ */
+ wpa_printf(MSG_INFO, "TDLS: We were not the initiator, so "
+ "ignore TPK M2 from " MACSTR, MAC2STR(src_addr));
+ return -1;
+ }
wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_REQUEST);
- if (len < 3 + 2 + 1)
+ if (len < 3 + 2 + 1) {
+ wpa_tdls_disable_peer_link(sm, peer);
return -1;
+ }
+
pos = buf;
pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
status = WPA_GET_LE16(pos);
pos += 2 /* status code */;
- if (status != 0) {
+ if (status != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_INFO, "TDLS: Status code in TPK M2: %u",
status);
+ wpa_tdls_disable_peer_link(sm, peer);
return -1;
}
+ status = WLAN_STATUS_UNSPECIFIED_FAILURE;
+
/* TODO: need to verify dialog token matches here or in kernel */
dtoken = *pos++; /* dialog token */
wpa_printf(MSG_DEBUG, "TDLS: Dialog Token in TPK M2 %d", dtoken);
- if (len < 3 + 2 + 1 + 2)
+ if (len < 3 + 2 + 1 + 2) {
+ wpa_tdls_disable_peer_link(sm, peer);
return -1;
- pos += 2; /* capability information */
+ }
+
+ /* capability information */
+ peer->capability = WPA_GET_LE16(pos);
+ pos += 2;
ielen = len - (pos - buf); /* start of IE in buf */
if (wpa_supplicant_parse_ies(pos, ielen, &kde) < 0) {
wpa_printf(MSG_INFO, "TDLS: Failed to parse IEs in TPK M2");
- return -1;
+ goto error;
+ }
+
+#ifdef CONFIG_TDLS_TESTING
+ if (tdls_testing & TDLS_TESTING_DECLINE_RESP) {
+ wpa_printf(MSG_DEBUG, "TDLS: Testing - decline response");
+ status = WLAN_STATUS_REQUEST_DECLINED;
+ goto error;
}
+#endif /* CONFIG_TDLS_TESTING */
if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in "
"TPK M2");
- return -1;
+ goto error;
}
wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M2",
kde.lnkid, kde.lnkid_len);
if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
wpa_printf(MSG_INFO, "TDLS: TPK M2 from different BSS");
- wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM,
- dtoken, WLAN_STATUS_NOT_IN_SAME_BSS);
- return -1;
+ status = WLAN_STATUS_NOT_IN_SAME_BSS;
+ goto error;
}
+ if (copy_supp_rates(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_ht_capab(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_vht_capab(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_ext_capab(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_supp_channels(&kde, peer) < 0)
+ goto error;
+
+ if (copy_peer_supp_oper_classes(&kde, peer) < 0)
+ goto error;
+
+ peer->qos_info = kde.qosinfo;
+
+ /* Overwrite with the qos_info obtained in WMM IE */
+ if (copy_peer_wmm_capab(&kde, peer) < 0)
+ goto error;
+
+ peer->aid = kde.aid;
+
if (!wpa_tdls_get_privacy(sm)) {
peer->rsnie_p_len = 0;
peer->cipher = WPA_CIPHER_NONE;
goto skip_rsn;
}
- if (kde.rsn_ie == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No RSN IE in TPK M2");
- return -1;
+ if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) ||
+ kde.rsn_ie == NULL) {
+ wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M2");
+ status = WLAN_STATUS_INVALID_PARAMETERS;
+ goto error;
}
- wpa_hexdump(MSG_DEBUG, "TDLS: RSNIE Received from TPK M2",
+ wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
kde.rsn_ie, kde.rsn_ie_len);
+ if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) {
+ wpa_printf(MSG_INFO,
+ "TDLS: Too long Responder RSN IE in TPK M2");
+ status = WLAN_STATUS_INVALID_RSNIE;
+ goto error;
+ }
+
+ /*
+ * FIX: bitwise comparison of RSN IE is not the correct way of
+ * validation this. It can be different, but certain fields must
+ * match. Since we list only a single pairwise cipher in TPK M1, the
+ * memcmp is likely to work in most cases, though.
+ */
if (kde.rsn_ie_len != peer->rsnie_i_len ||
os_memcmp(peer->rsnie_i, kde.rsn_ie, peer->rsnie_i_len) != 0) {
wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M2 does "
peer->rsnie_i, peer->rsnie_i_len);
wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2",
kde.rsn_ie, kde.rsn_ie_len);
- wpa_tdls_send_error(sm, src_addr,
- WLAN_TDLS_SETUP_CONFIRM, dtoken,
- WLAN_STATUS_UNSUPPORTED_RSN_IE_VERSION);
-
- return -1;
+ status = WLAN_STATUS_INVALID_RSNIE;
+ goto error;
}
if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) {
wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M2");
- return -1;
+ status = WLAN_STATUS_INVALID_RSNIE;
+ goto error;
}
cipher = ie.pairwise_cipher;
- if (cipher & WPA_CIPHER_CCMP) {
+ if (cipher == WPA_CIPHER_CCMP) {
wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link");
cipher = WPA_CIPHER_CCMP;
} else {
wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M2");
- wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM,
- dtoken,
- WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID);
- return -1;
+ status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
+ goto error;
}
- if (kde.ftie == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No FTIE in TPK M2");
- return -1;
- }
wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M2",
kde.ftie, sizeof(*ftie));
ftie = (struct wpa_tdls_ftie *) kde.ftie;
if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M2 does "
"not match with FTIE SNonce used in TPK M1");
+ /* Silently discard the frame */
return -1;
}
/* Lifetime */
if (kde.key_lifetime == NULL) {
wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M2");
- return -1;
+ status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+ goto error;
}
timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
lifetime = WPA_GET_LE32(timeoutie->value);
if (lifetime != peer->lifetime) {
wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
"TPK M2 (expected %u)", lifetime, peer->lifetime);
- wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM,
- dtoken, WLAN_STATUS_UNACCEPTABLE_LIFETIME);
- return -1;
+ status = WLAN_STATUS_UNACCEPTABLE_LIFETIME;
+ goto error;
}
wpa_tdls_generate_tpk(peer, sm->own_addr, sm->bssid);
/* Process MIC check to see if TPK M2 is right */
if (wpa_supplicant_verify_tdls_mic(2, peer, (u8 *) lnkid,
(u8 *) timeoutie, ftie) < 0) {
+ /* Discard the frame */
wpa_tdls_del_key(sm, peer);
- wpa_tdls_peer_free(sm, peer);
+ wpa_tdls_disable_peer_link(sm, peer);
return -1;
}
- wpa_tdls_set_key(sm, peer);
+ if (wpa_tdls_set_key(sm, peer) < 0) {
+ /*
+ * Some drivers may not be able to config the key prior to full
+ * STA entry having been configured.
+ */
+ wpa_printf(MSG_DEBUG, "TDLS: Try to configure TPK again after "
+ "STA entry is complete");
+ peer->reconfig_key = 1;
+ }
skip_rsn:
peer->dtoken = dtoken;
+ /* add supported rates, capabilities, and qos_info to the TDLS peer */
+ if (wpa_sm_tdls_peer_addset(sm, peer->addr, 0, peer->aid,
+ peer->capability,
+ peer->supp_rates, peer->supp_rates_len,
+ peer->ht_capabilities,
+ peer->vht_capabilities,
+ peer->qos_info, peer->ext_capab,
+ peer->ext_capab_len,
+ peer->supp_channels,
+ peer->supp_channels_len,
+ peer->supp_oper_classes,
+ peer->supp_oper_classes_len) < 0)
+ goto error;
+
wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Confirm / "
"TPK Handshake Message 3");
- wpa_tdls_send_tpk_m3(sm, src_addr, dtoken, lnkid, peer);
+ if (wpa_tdls_send_tpk_m3(sm, src_addr, dtoken, lnkid, peer) < 0)
+ goto error;
- wpa_tdls_enable_link(sm, peer);
+ if (!peer->tpk_success) {
+ /*
+ * Enable Link only when tpk_success is 0, signifying that this
+ * processing of TPK M2 frame is not because of a retransmission
+ * during TDLS setup handshake.
+ */
+ ret = wpa_tdls_enable_link(sm, peer);
+ if (ret < 0) {
+ wpa_printf(MSG_DEBUG, "TDLS: Could not enable link");
+ wpa_tdls_do_teardown(
+ sm, peer,
+ WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
+ }
+ }
+ return ret;
- return 0;
+error:
+ wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken,
+ status);
+ wpa_tdls_disable_peer_link(sm, peer);
+ return -1;
}
u16 status;
const u8 *pos;
u32 lifetime;
+ int ret = 0;
wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Confirm / TPK M3 "
"(Peer " MACSTR ")", MAC2STR(src_addr));
}
wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_RESPONSE);
+ if (len < 3 + 3)
+ goto error;
pos = buf;
pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */;
if (status != 0) {
wpa_printf(MSG_INFO, "TDLS: Status code in TPK M3: %u",
status);
- return -1;
+ goto error;
}
pos += 2 /* status code */ + 1 /* dialog token */;
ielen = len - (pos - buf); /* start of IE in buf */
+
+ /*
+ * Don't reject the message if failing to parse IEs. The IEs we need are
+ * explicitly checked below. Some APs piggy-back broken IEs to the end
+ * of a TDLS Confirm packet, which will fail the link if we don't ignore
+ * this error.
+ */
if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) {
- wpa_printf(MSG_INFO, "TDLS: Failed to parse KDEs in TPK M3");
- return -1;
+ wpa_printf(MSG_DEBUG,
+ "TDLS: Failed to parse KDEs in TPK M3 - ignore as an interop workaround");
}
if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) {
wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TPK M3");
- return -1;
+ goto error;
}
wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M3",
(u8 *) kde.lnkid, kde.lnkid_len);
if (os_memcmp(sm->bssid, lnkid->bssid, ETH_ALEN) != 0) {
wpa_printf(MSG_INFO, "TDLS: TPK M3 from diff BSS");
- return -1;
+ goto error;
}
if (!wpa_tdls_get_privacy(sm))
goto skip_rsn;
- if (kde.ftie == NULL) {
+ if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) {
wpa_printf(MSG_INFO, "TDLS: No FTIE in TPK M3");
- return -1;
+ goto error;
}
wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M3",
- (u8 *) ftie, sizeof(*ftie));
+ kde.ftie, sizeof(*ftie));
ftie = (struct wpa_tdls_ftie *) kde.ftie;
if (kde.rsn_ie == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No RSN IE KDE in TPK M3");
- return -1;
+ wpa_printf(MSG_INFO, "TDLS: No RSN IE in TPK M3");
+ goto error;
}
- wpa_hexdump(MSG_DEBUG, "TDLS: RSNIE Received from TPK M3",
+ wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M3",
kde.rsn_ie, kde.rsn_ie_len);
+ if (kde.rsn_ie_len != peer->rsnie_p_len ||
+ os_memcmp(kde.rsn_ie, peer->rsnie_p, peer->rsnie_p_len) != 0) {
+ wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M3 does not match "
+ "with the one sent in TPK M2");
+ goto error;
+ }
if (!os_memcmp(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN) == 0) {
wpa_printf(MSG_INFO, "TDLS: FTIE ANonce in TPK M3 does "
"not match with FTIE ANonce used in TPK M2");
- return -1;
+ goto error;
}
if (!os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) == 0) {
wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M3 does not "
"match with FTIE SNonce used in TPK M1");
- return -1;
+ goto error;
}
if (kde.key_lifetime == NULL) {
wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M3");
- return -1;
+ goto error;
}
timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime;
wpa_hexdump(MSG_DEBUG, "TDLS: Timeout IE Received from TPK M3",
if (lifetime != peer->lifetime) {
wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in "
"TPK M3 (expected %u)", lifetime, peer->lifetime);
- return -1;
+ goto error;
}
if (wpa_supplicant_verify_tdls_mic(3, peer, (u8 *) lnkid,
(u8 *) timeoutie, ftie) < 0) {
wpa_tdls_del_key(sm, peer);
- wpa_tdls_peer_free(sm, peer);
- return -1;
+ goto error;
}
- if (wpa_tdls_set_key(sm, peer) < 0)
- return -1;
+ if (wpa_tdls_set_key(sm, peer) < 0) {
+ /*
+ * Some drivers may not be able to config the key prior to full
+ * STA entry having been configured.
+ */
+ wpa_printf(MSG_DEBUG, "TDLS: Try to configure TPK again after "
+ "STA entry is complete");
+ peer->reconfig_key = 1;
+ }
skip_rsn:
- wpa_tdls_enable_link(sm, peer);
-
- return 0;
+ /* add supported rates, capabilities, and qos_info to the TDLS peer */
+ if (wpa_sm_tdls_peer_addset(sm, peer->addr, 0, peer->aid,
+ peer->capability,
+ peer->supp_rates, peer->supp_rates_len,
+ peer->ht_capabilities,
+ peer->vht_capabilities,
+ peer->qos_info, peer->ext_capab,
+ peer->ext_capab_len,
+ peer->supp_channels,
+ peer->supp_channels_len,
+ peer->supp_oper_classes,
+ peer->supp_oper_classes_len) < 0)
+ goto error;
+
+ if (!peer->tpk_success) {
+ /*
+ * Enable Link only when tpk_success is 0, signifying that this
+ * processing of TPK M3 frame is not because of a retransmission
+ * during TDLS setup handshake.
+ */
+ ret = wpa_tdls_enable_link(sm, peer);
+ if (ret < 0) {
+ wpa_printf(MSG_DEBUG, "TDLS: Could not enable link");
+ wpa_tdls_do_teardown(
+ sm, peer,
+ WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
+ }
+ }
+ return ret;
+error:
+ wpa_tdls_disable_peer_link(sm, peer);
+ return -1;
}
int wpa_tdls_start(struct wpa_sm *sm, const u8 *addr)
{
struct wpa_tdls_peer *peer;
+ int tdls_prohibited = sm->tdls_prohibited;
- /* Find existing entry and if found, use that instead of adding
- * a new one */
- for (peer = sm->tdls; peer; peer = peer->next) {
- if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
- break;
+ if (sm->tdls_disabled || !sm->tdls_supported)
+ return -1;
+
+#ifdef CONFIG_TDLS_TESTING
+ if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) &&
+ tdls_prohibited) {
+ wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition "
+ "on TDLS");
+ tdls_prohibited = 0;
}
+#endif /* CONFIG_TDLS_TESTING */
- if (peer == NULL) {
- wpa_printf(MSG_INFO, "TDLS: No matching entry found for "
- "peer, creating one for " MACSTR, MAC2STR(addr));
- peer = os_malloc(sizeof(*peer));
- if (peer == NULL)
- return -1;
- os_memset(peer, 0, sizeof(*peer));
- os_memcpy(peer->addr, addr, ETH_ALEN);
- peer->next = sm->tdls;
- sm->tdls = peer;
+ if (tdls_prohibited) {
+ wpa_printf(MSG_DEBUG, "TDLS: TDLS is prohibited in this BSS - "
+ "reject request to start setup");
+ return -1;
+ }
+
+ peer = wpa_tdls_add_peer(sm, addr, NULL);
+ if (peer == NULL)
+ return -1;
+
+ if (peer->tpk_in_progress) {
+ wpa_printf(MSG_DEBUG, "TDLS: Setup is already in progress with the peer");
+ return 0;
}
peer->initiator = 1;
- return wpa_tdls_send_tpk_m1(sm, peer);
+ /* add the peer to the driver as a "setup in progress" peer */
+ wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, 0, NULL, 0, NULL, NULL, 0,
+ NULL, 0, NULL, 0, NULL, 0);
+
+ peer->tpk_in_progress = 1;
+
+ if (wpa_tdls_send_tpk_m1(sm, peer) < 0) {
+ wpa_tdls_disable_peer_link(sm, peer);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+void wpa_tdls_remove(struct wpa_sm *sm, const u8 *addr)
+{
+ struct wpa_tdls_peer *peer;
+
+ if (sm->tdls_disabled || !sm->tdls_supported)
+ return;
+
+ for (peer = sm->tdls; peer; peer = peer->next) {
+ if (os_memcmp(peer->addr, addr, ETH_ALEN) == 0)
+ break;
+ }
+
+ if (peer == NULL || !peer->tpk_success)
+ return;
+
+ if (sm->tdls_external_setup) {
+ /*
+ * Disable previous link to allow renegotiation to be completed
+ * on AP path.
+ */
+ wpa_tdls_do_teardown(sm, peer,
+ WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED);
+ }
}
wpa_hexdump(MSG_DEBUG, "TDLS: Received Data frame encapsulation",
buf, len);
+ if (sm->tdls_disabled || !sm->tdls_supported) {
+ wpa_printf(MSG_DEBUG, "TDLS: Discard message - TDLS disabled "
+ "or unsupported by driver");
+ return;
+ }
+
if (os_memcmp(src_addr, sm->own_addr, ETH_ALEN) == 0) {
wpa_printf(MSG_DEBUG, "TDLS: Discard copy of own message");
return;
case WLAN_TDLS_TEARDOWN:
wpa_tdls_recv_teardown(sm, src_addr, buf, len);
break;
+ case WLAN_TDLS_DISCOVERY_REQUEST:
+ wpa_tdls_process_discovery_request(sm, src_addr, buf, len);
+ break;
default:
/* Kernel code will process remaining frames */
wpa_printf(MSG_DEBUG, "TDLS: Ignore TDLS frame action code %u",
if (sm == NULL)
return -1;
- sm->l2_tdls = l2_packet_init(sm->ifname, sm->own_addr,
+ sm->l2_tdls = l2_packet_init(sm->bridge_ifname ? sm->bridge_ifname :
+ sm->ifname,
+ sm->own_addr,
ETH_P_80211_ENCAP, wpa_supplicant_rx_tdls,
sm, 0);
if (sm->l2_tdls == NULL) {
return -1;
}
+ /*
+ * Drivers that support TDLS but don't implement the get_capa callback
+ * are assumed to perform everything internally
+ */
+ if (wpa_sm_tdls_get_capa(sm, &sm->tdls_supported,
+ &sm->tdls_external_setup) < 0) {
+ sm->tdls_supported = 1;
+ sm->tdls_external_setup = 0;
+ }
+
+ wpa_printf(MSG_DEBUG, "TDLS: TDLS operation%s supported by "
+ "driver", sm->tdls_supported ? "" : " not");
+ wpa_printf(MSG_DEBUG, "TDLS: Driver uses %s link setup",
+ sm->tdls_external_setup ? "external" : "internal");
+
return 0;
}
+void wpa_tdls_teardown_peers(struct wpa_sm *sm)
+{
+ struct wpa_tdls_peer *peer, *tmp;
+
+ peer = sm->tdls;
+
+ wpa_printf(MSG_DEBUG, "TDLS: Tear down peers");
+
+ while (peer) {
+ tmp = peer->next;
+ wpa_printf(MSG_DEBUG, "TDLS: Tear down peer " MACSTR,
+ MAC2STR(peer->addr));
+ if (sm->tdls_external_setup)
+ wpa_tdls_do_teardown(sm, peer,
+ WLAN_REASON_DEAUTH_LEAVING);
+ else
+ wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr);
+
+ peer = tmp;
+ }
+}
+
+
static void wpa_tdls_remove_peers(struct wpa_sm *sm)
{
struct wpa_tdls_peer *peer, *tmp;
peer = sm->tdls;
- sm->tdls = NULL;
while (peer) {
int res;
wpa_printf(MSG_DEBUG, "TDLS: Remove peer " MACSTR " (res=%d)",
MAC2STR(peer->addr), res);
wpa_tdls_peer_free(sm, peer);
- os_free(peer);
peer = tmp;
}
}
wpa_printf(MSG_DEBUG, "TDLS: Remove peers on disassociation");
wpa_tdls_remove_peers(sm);
}
+
+
+static int wpa_tdls_prohibited(const u8 *ies, size_t len)
+{
+ struct wpa_eapol_ie_parse elems;
+
+ if (ies == NULL)
+ return 0;
+
+ if (wpa_supplicant_parse_ies(ies, len, &elems) < 0)
+ return 0;
+
+ if (elems.ext_capab == NULL || elems.ext_capab_len < 2 + 5)
+ return 0;
+
+ /* bit 38 - TDLS Prohibited */
+ return !!(elems.ext_capab[2 + 4] & 0x40);
+}
+
+
+void wpa_tdls_ap_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
+{
+ sm->tdls_prohibited = wpa_tdls_prohibited(ies, len);
+ wpa_printf(MSG_DEBUG, "TDLS: TDLS is %s in the target BSS",
+ sm->tdls_prohibited ? "prohibited" : "allowed");
+}
+
+
+void wpa_tdls_assoc_resp_ies(struct wpa_sm *sm, const u8 *ies, size_t len)
+{
+ if (!sm->tdls_prohibited && wpa_tdls_prohibited(ies, len)) {
+ wpa_printf(MSG_DEBUG, "TDLS: TDLS prohibited based on "
+ "(Re)Association Response IEs");
+ sm->tdls_prohibited = 1;
+ }
+}
+
+
+void wpa_tdls_enable(struct wpa_sm *sm, int enabled)
+{
+ wpa_printf(MSG_DEBUG, "TDLS: %s", enabled ? "enabled" : "disabled");
+ sm->tdls_disabled = !enabled;
+}
+
+
+int wpa_tdls_is_external_setup(struct wpa_sm *sm)
+{
+ return sm->tdls_external_setup;
+}
projects / mech_eap.git / blobdiff