Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * wpa_supplicant - TDLS |
| 3 | * Copyright (c) 2010-2011, Atheros Communications |
| 4 | * |
Dmitry Shmidt | c5ec7f5 | 2012-03-06 16:33:24 -0800 | [diff] [blame] | 5 | * This software may be distributed under the terms of the BSD license. |
| 6 | * See README for more details. |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include "utils/includes.h" |
| 10 | |
| 11 | #include "utils/common.h" |
| 12 | #include "utils/eloop.h" |
| 13 | #include "utils/os.h" |
| 14 | #include "common/ieee802_11_defs.h" |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 15 | #include "common/ieee802_11_common.h" |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 16 | #include "crypto/sha256.h" |
| 17 | #include "crypto/crypto.h" |
| 18 | #include "crypto/aes_wrap.h" |
| 19 | #include "rsn_supp/wpa.h" |
| 20 | #include "rsn_supp/wpa_ie.h" |
| 21 | #include "rsn_supp/wpa_i.h" |
| 22 | #include "drivers/driver.h" |
| 23 | #include "l2_packet/l2_packet.h" |
| 24 | |
| 25 | #ifdef CONFIG_TDLS_TESTING |
| 26 | #define TDLS_TESTING_LONG_FRAME BIT(0) |
| 27 | #define TDLS_TESTING_ALT_RSN_IE BIT(1) |
| 28 | #define TDLS_TESTING_DIFF_BSSID BIT(2) |
| 29 | #define TDLS_TESTING_SHORT_LIFETIME BIT(3) |
| 30 | #define TDLS_TESTING_WRONG_LIFETIME_RESP BIT(4) |
| 31 | #define TDLS_TESTING_WRONG_LIFETIME_CONF BIT(5) |
| 32 | #define TDLS_TESTING_LONG_LIFETIME BIT(6) |
| 33 | #define TDLS_TESTING_CONCURRENT_INIT BIT(7) |
| 34 | #define TDLS_TESTING_NO_TPK_EXPIRATION BIT(8) |
| 35 | #define TDLS_TESTING_DECLINE_RESP BIT(9) |
| 36 | #define TDLS_TESTING_IGNORE_AP_PROHIBIT BIT(10) |
Dmitry Shmidt | 21de214 | 2014-04-08 10:50:52 -0700 | [diff] [blame] | 37 | #define TDLS_TESTING_WRONG_MIC BIT(11) |
Roshan Pius | 3a1667e | 2018-07-03 15:17:14 -0700 | [diff] [blame] | 38 | #define TDLS_TESTING_DOUBLE_TPK_M2 BIT(12) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 39 | unsigned int tdls_testing = 0; |
| 40 | #endif /* CONFIG_TDLS_TESTING */ |
| 41 | |
| 42 | #define TPK_LIFETIME 43200 /* 12 hours */ |
Dmitry Shmidt | f7e0a99 | 2013-05-23 11:03:10 -0700 | [diff] [blame] | 43 | #define TPK_M1_RETRY_COUNT 3 |
| 44 | #define TPK_M1_TIMEOUT 5000 /* in milliseconds */ |
| 45 | #define TPK_M2_RETRY_COUNT 10 |
| 46 | #define TPK_M2_TIMEOUT 500 /* in milliseconds */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 47 | |
| 48 | #define TDLS_MIC_LEN 16 |
| 49 | |
| 50 | #define TDLS_TIMEOUT_LEN 4 |
| 51 | |
| 52 | struct wpa_tdls_ftie { |
| 53 | u8 ie_type; /* FTIE */ |
| 54 | u8 ie_len; |
| 55 | u8 mic_ctrl[2]; |
| 56 | u8 mic[TDLS_MIC_LEN]; |
| 57 | u8 Anonce[WPA_NONCE_LEN]; /* Responder Nonce in TDLS */ |
| 58 | u8 Snonce[WPA_NONCE_LEN]; /* Initiator Nonce in TDLS */ |
| 59 | /* followed by optional elements */ |
| 60 | } STRUCT_PACKED; |
| 61 | |
| 62 | struct wpa_tdls_timeoutie { |
| 63 | u8 ie_type; /* Timeout IE */ |
| 64 | u8 ie_len; |
| 65 | u8 interval_type; |
| 66 | u8 value[TDLS_TIMEOUT_LEN]; |
| 67 | } STRUCT_PACKED; |
| 68 | |
| 69 | struct wpa_tdls_lnkid { |
| 70 | u8 ie_type; /* Link Identifier IE */ |
| 71 | u8 ie_len; |
| 72 | u8 bssid[ETH_ALEN]; |
| 73 | u8 init_sta[ETH_ALEN]; |
| 74 | u8 resp_sta[ETH_ALEN]; |
| 75 | } STRUCT_PACKED; |
| 76 | |
| 77 | /* TDLS frame headers as per IEEE Std 802.11z-2010 */ |
| 78 | struct wpa_tdls_frame { |
| 79 | u8 payloadtype; /* IEEE80211_TDLS_RFTYPE */ |
| 80 | u8 category; /* Category */ |
| 81 | u8 action; /* Action (enum tdls_frame_type) */ |
| 82 | } STRUCT_PACKED; |
| 83 | |
| 84 | static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs); |
| 85 | static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx); |
| 86 | static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer); |
Sunil Dutt | d0ef38b | 2013-09-30 17:34:13 +0300 | [diff] [blame] | 87 | static void wpa_tdls_disable_peer_link(struct wpa_sm *sm, |
| 88 | struct wpa_tdls_peer *peer); |
Dmitry Shmidt | b58836e | 2014-04-29 14:35:56 -0700 | [diff] [blame] | 89 | static int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr, |
| 90 | u16 reason_code); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 91 | |
| 92 | |
| 93 | #define TDLS_MAX_IE_LEN 80 |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 94 | #define IEEE80211_MAX_SUPP_RATES 32 |
| 95 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 96 | struct wpa_tdls_peer { |
| 97 | struct wpa_tdls_peer *next; |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 98 | unsigned int reconfig_key:1; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 99 | int initiator; /* whether this end was initiator for TDLS setup */ |
| 100 | u8 addr[ETH_ALEN]; /* other end MAC address */ |
| 101 | u8 inonce[WPA_NONCE_LEN]; /* Initiator Nonce */ |
| 102 | u8 rnonce[WPA_NONCE_LEN]; /* Responder Nonce */ |
| 103 | u8 rsnie_i[TDLS_MAX_IE_LEN]; /* Initiator RSN IE */ |
| 104 | size_t rsnie_i_len; |
| 105 | u8 rsnie_p[TDLS_MAX_IE_LEN]; /* Peer RSN IE */ |
| 106 | size_t rsnie_p_len; |
| 107 | u32 lifetime; |
| 108 | int cipher; /* Selected cipher (WPA_CIPHER_*) */ |
| 109 | u8 dtoken; |
| 110 | |
| 111 | struct tpk { |
| 112 | u8 kck[16]; /* TPK-KCK */ |
| 113 | u8 tk[16]; /* TPK-TK; assuming only CCMP will be used */ |
| 114 | } tpk; |
| 115 | int tpk_set; |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 116 | int tk_set; /* TPK-TK configured to the driver */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 117 | int tpk_success; |
Sunil Dutt | 73b28cc | 2013-09-30 17:38:41 +0300 | [diff] [blame] | 118 | int tpk_in_progress; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 119 | |
| 120 | struct tpk_timer { |
| 121 | u8 dest[ETH_ALEN]; |
| 122 | int count; /* Retry Count */ |
| 123 | int timer; /* Timeout in milliseconds */ |
| 124 | u8 action_code; /* TDLS frame type */ |
| 125 | u8 dialog_token; |
| 126 | u16 status_code; |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 127 | u32 peer_capab; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 128 | int buf_len; /* length of TPK message for retransmission */ |
| 129 | u8 *buf; /* buffer for TPK message */ |
| 130 | } sm_tmr; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 131 | |
| 132 | u16 capability; |
| 133 | |
| 134 | u8 supp_rates[IEEE80211_MAX_SUPP_RATES]; |
| 135 | size_t supp_rates_len; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 136 | |
| 137 | struct ieee80211_ht_capabilities *ht_capabilities; |
Dmitry Shmidt | 33e38bf | 2013-02-27 12:56:00 -0800 | [diff] [blame] | 138 | struct ieee80211_vht_capabilities *vht_capabilities; |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 139 | struct ieee80211_he_capabilities *he_capabilities; |
| 140 | size_t he_capab_len; |
| 141 | struct ieee80211_he_6ghz_band_cap *he_6ghz_band_capabilities; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 142 | struct ieee80211_eht_capabilities *eht_capabilities; |
| 143 | size_t eht_capab_len; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 144 | |
| 145 | u8 qos_info; |
| 146 | |
Dmitry Shmidt | 51b6ea8 | 2013-05-08 10:42:09 -0700 | [diff] [blame] | 147 | u16 aid; |
| 148 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 149 | u8 *ext_capab; |
| 150 | size_t ext_capab_len; |
Dmitry Shmidt | 344abd3 | 2014-01-14 13:17:00 -0800 | [diff] [blame] | 151 | |
| 152 | u8 *supp_channels; |
| 153 | size_t supp_channels_len; |
| 154 | |
| 155 | u8 *supp_oper_classes; |
| 156 | size_t supp_oper_classes_len; |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 157 | |
| 158 | u8 wmm_capable; |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 159 | |
| 160 | /* channel switch currently enabled */ |
| 161 | int chan_switch_enabled; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 162 | |
| 163 | int mld_link_id; |
Sunil Ravi | 99c035e | 2024-07-12 01:42:03 +0000 | [diff] [blame^] | 164 | bool disc_resp_rcvd; |
| 165 | bool setup_req_rcvd; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 166 | }; |
| 167 | |
| 168 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 169 | static const u8 * wpa_tdls_get_link_bssid(struct wpa_sm *sm, int link_id) |
| 170 | { |
| 171 | if (link_id >= 0) |
| 172 | return sm->mlo.links[link_id].bssid; |
| 173 | return sm->bssid; |
| 174 | } |
| 175 | |
| 176 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 177 | static int wpa_tdls_get_privacy(struct wpa_sm *sm) |
| 178 | { |
| 179 | /* |
| 180 | * Get info needed from supplicant to check if the current BSS supports |
| 181 | * security. Other than OPEN mode, rest are considered secured |
| 182 | * WEP/WPA/WPA2 hence TDLS frames are processed for TPK handshake. |
| 183 | */ |
| 184 | return sm->pairwise_cipher != WPA_CIPHER_NONE; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | static u8 * wpa_add_ie(u8 *pos, const u8 *ie, size_t ie_len) |
| 189 | { |
| 190 | os_memcpy(pos, ie, ie_len); |
| 191 | return pos + ie_len; |
| 192 | } |
| 193 | |
| 194 | |
| 195 | static int wpa_tdls_del_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer) |
| 196 | { |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 197 | if (wpa_sm_set_key(sm, -1, WPA_ALG_NONE, peer->addr, |
Hai Shalom | fdcde76 | 2020-04-02 11:19:20 -0700 | [diff] [blame] | 198 | 0, 0, NULL, 0, NULL, 0, KEY_FLAG_PAIRWISE) < 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 199 | wpa_printf(MSG_WARNING, "TDLS: Failed to delete TPK-TK from " |
| 200 | "the driver"); |
| 201 | return -1; |
| 202 | } |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | |
| 208 | static int wpa_tdls_set_key(struct wpa_sm *sm, struct wpa_tdls_peer *peer) |
| 209 | { |
| 210 | u8 key_len; |
| 211 | u8 rsc[6]; |
| 212 | enum wpa_alg alg; |
| 213 | |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 214 | if (peer->tk_set) { |
| 215 | /* |
| 216 | * This same TPK-TK has already been configured to the driver |
| 217 | * and this new configuration attempt (likely due to an |
| 218 | * unexpected retransmitted frame) would result in clearing |
| 219 | * the TX/RX sequence number which can break security, so must |
| 220 | * not allow that to happen. |
| 221 | */ |
| 222 | wpa_printf(MSG_INFO, "TDLS: TPK-TK for the peer " MACSTR |
| 223 | " has already been configured to the driver - do not reconfigure", |
| 224 | MAC2STR(peer->addr)); |
| 225 | return -1; |
| 226 | } |
| 227 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 228 | os_memset(rsc, 0, 6); |
| 229 | |
| 230 | switch (peer->cipher) { |
| 231 | case WPA_CIPHER_CCMP: |
| 232 | alg = WPA_ALG_CCMP; |
| 233 | key_len = 16; |
| 234 | break; |
| 235 | case WPA_CIPHER_NONE: |
| 236 | wpa_printf(MSG_DEBUG, "TDLS: Pairwise Cipher Suite: " |
| 237 | "NONE - do not use pairwise keys"); |
| 238 | return -1; |
| 239 | default: |
| 240 | wpa_printf(MSG_WARNING, "TDLS: Unsupported pairwise cipher %d", |
| 241 | sm->pairwise_cipher); |
| 242 | return -1; |
| 243 | } |
| 244 | |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 245 | wpa_printf(MSG_DEBUG, "TDLS: Configure pairwise key for peer " MACSTR, |
| 246 | MAC2STR(peer->addr)); |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 247 | if (wpa_sm_set_key(sm, -1, alg, peer->addr, 0, 1, rsc, sizeof(rsc), |
Hai Shalom | fdcde76 | 2020-04-02 11:19:20 -0700 | [diff] [blame] | 248 | peer->tpk.tk, key_len, |
| 249 | KEY_FLAG_PAIRWISE_RX_TX) < 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 250 | wpa_printf(MSG_WARNING, "TDLS: Failed to set TPK to the " |
| 251 | "driver"); |
| 252 | return -1; |
| 253 | } |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 254 | peer->tk_set = 1; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | |
| 259 | static int wpa_tdls_send_tpk_msg(struct wpa_sm *sm, const u8 *dst, |
| 260 | u8 action_code, u8 dialog_token, |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 261 | u16 status_code, u32 peer_capab, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 262 | int initiator, const u8 *buf, size_t len, |
| 263 | int link_id) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 264 | { |
| 265 | return wpa_sm_send_tdls_mgmt(sm, dst, action_code, dialog_token, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 266 | status_code, peer_capab, initiator, buf, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 267 | len, link_id); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | |
| 271 | static int wpa_tdls_tpk_send(struct wpa_sm *sm, const u8 *dest, u8 action_code, |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 272 | u8 dialog_token, u16 status_code, u32 peer_capab, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 273 | int initiator, const u8 *msg, size_t msg_len, |
| 274 | int link_id) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 275 | { |
| 276 | struct wpa_tdls_peer *peer; |
| 277 | |
| 278 | wpa_printf(MSG_DEBUG, "TDLS: TPK send dest=" MACSTR " action_code=%u " |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 279 | "dialog_token=%u status_code=%u peer_capab=%u initiator=%d " |
| 280 | "msg_len=%u", |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 281 | MAC2STR(dest), action_code, dialog_token, status_code, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 282 | peer_capab, initiator, (unsigned int) msg_len); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 283 | |
| 284 | if (wpa_tdls_send_tpk_msg(sm, dest, action_code, dialog_token, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 285 | status_code, peer_capab, initiator, msg, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 286 | msg_len, link_id)) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 287 | wpa_printf(MSG_INFO, "TDLS: Failed to send message " |
| 288 | "(action_code=%u)", action_code); |
| 289 | return -1; |
| 290 | } |
| 291 | |
| 292 | if (action_code == WLAN_TDLS_SETUP_CONFIRM || |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 293 | action_code == WLAN_TDLS_TEARDOWN || |
| 294 | action_code == WLAN_TDLS_DISCOVERY_REQUEST || |
| 295 | action_code == WLAN_TDLS_DISCOVERY_RESPONSE) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 296 | return 0; /* No retries */ |
| 297 | |
| 298 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 299 | if (ether_addr_equal(peer->addr, dest)) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 300 | break; |
| 301 | } |
| 302 | |
| 303 | if (peer == NULL) { |
| 304 | wpa_printf(MSG_INFO, "TDLS: No matching entry found for " |
| 305 | "retry " MACSTR, MAC2STR(dest)); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer); |
| 310 | |
Dmitry Shmidt | f7e0a99 | 2013-05-23 11:03:10 -0700 | [diff] [blame] | 311 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { |
| 312 | peer->sm_tmr.count = TPK_M2_RETRY_COUNT; |
| 313 | peer->sm_tmr.timer = TPK_M2_TIMEOUT; |
| 314 | } else { |
| 315 | peer->sm_tmr.count = TPK_M1_RETRY_COUNT; |
| 316 | peer->sm_tmr.timer = TPK_M1_TIMEOUT; |
| 317 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 318 | |
| 319 | /* Copy message to resend on timeout */ |
| 320 | os_memcpy(peer->sm_tmr.dest, dest, ETH_ALEN); |
| 321 | peer->sm_tmr.action_code = action_code; |
| 322 | peer->sm_tmr.dialog_token = dialog_token; |
| 323 | peer->sm_tmr.status_code = status_code; |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 324 | peer->sm_tmr.peer_capab = peer_capab; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 325 | peer->sm_tmr.buf_len = msg_len; |
| 326 | os_free(peer->sm_tmr.buf); |
Dmitry Shmidt | d2986c2 | 2017-10-23 14:22:09 -0700 | [diff] [blame] | 327 | peer->sm_tmr.buf = os_memdup(msg, msg_len); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 328 | if (peer->sm_tmr.buf == NULL) |
| 329 | return -1; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 330 | |
| 331 | wpa_printf(MSG_DEBUG, "TDLS: Retry timeout registered " |
| 332 | "(action_code=%u)", action_code); |
Dmitry Shmidt | f7e0a99 | 2013-05-23 11:03:10 -0700 | [diff] [blame] | 333 | eloop_register_timeout(peer->sm_tmr.timer / 1000, |
| 334 | (peer->sm_tmr.timer % 1000) * 1000, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 335 | wpa_tdls_tpk_retry_timeout, sm, peer); |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 340 | static int wpa_tdls_do_teardown(struct wpa_sm *sm, struct wpa_tdls_peer *peer, |
Sunil Dutt | 6a9f522 | 2013-09-30 17:10:18 +0300 | [diff] [blame] | 341 | u16 reason_code) |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 342 | { |
| 343 | int ret; |
| 344 | |
Sunil Dutt | 6a9f522 | 2013-09-30 17:10:18 +0300 | [diff] [blame] | 345 | ret = wpa_tdls_send_teardown(sm, peer->addr, reason_code); |
| 346 | /* disable the link after teardown was sent */ |
Sunil Dutt | d0ef38b | 2013-09-30 17:34:13 +0300 | [diff] [blame] | 347 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 348 | |
| 349 | return ret; |
| 350 | } |
| 351 | |
| 352 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 353 | static void wpa_tdls_tpk_retry_timeout(void *eloop_ctx, void *timeout_ctx) |
| 354 | { |
| 355 | |
| 356 | struct wpa_sm *sm = eloop_ctx; |
| 357 | struct wpa_tdls_peer *peer = timeout_ctx; |
| 358 | |
| 359 | if (peer->sm_tmr.count) { |
| 360 | peer->sm_tmr.count--; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 361 | |
| 362 | wpa_printf(MSG_INFO, "TDLS: Retrying sending of message " |
| 363 | "(action_code=%u)", |
| 364 | peer->sm_tmr.action_code); |
| 365 | |
| 366 | if (peer->sm_tmr.buf == NULL) { |
| 367 | wpa_printf(MSG_INFO, "TDLS: No retry buffer available " |
| 368 | "for action_code=%u", |
| 369 | peer->sm_tmr.action_code); |
| 370 | eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, |
| 371 | peer); |
| 372 | return; |
| 373 | } |
| 374 | |
| 375 | /* resend TPK Handshake Message to Peer */ |
| 376 | if (wpa_tdls_send_tpk_msg(sm, peer->sm_tmr.dest, |
| 377 | peer->sm_tmr.action_code, |
| 378 | peer->sm_tmr.dialog_token, |
| 379 | peer->sm_tmr.status_code, |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 380 | peer->sm_tmr.peer_capab, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 381 | peer->initiator, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 382 | peer->sm_tmr.buf, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 383 | peer->sm_tmr.buf_len, -1)) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 384 | wpa_printf(MSG_INFO, "TDLS: Failed to retry " |
| 385 | "transmission"); |
| 386 | } |
| 387 | |
| 388 | eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer); |
Dmitry Shmidt | f7e0a99 | 2013-05-23 11:03:10 -0700 | [diff] [blame] | 389 | eloop_register_timeout(peer->sm_tmr.timer / 1000, |
| 390 | (peer->sm_tmr.timer % 1000) * 1000, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 391 | wpa_tdls_tpk_retry_timeout, sm, peer); |
| 392 | } else { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 393 | eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer); |
| 394 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 395 | wpa_printf(MSG_DEBUG, "TDLS: Sending Teardown Request"); |
| 396 | wpa_tdls_do_teardown(sm, peer, |
Sunil Dutt | 6a9f522 | 2013-09-30 17:10:18 +0300 | [diff] [blame] | 397 | WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 398 | } |
| 399 | } |
| 400 | |
| 401 | |
| 402 | static void wpa_tdls_tpk_retry_timeout_cancel(struct wpa_sm *sm, |
| 403 | struct wpa_tdls_peer *peer, |
| 404 | u8 action_code) |
| 405 | { |
| 406 | if (action_code == peer->sm_tmr.action_code) { |
| 407 | wpa_printf(MSG_DEBUG, "TDLS: Retry timeout cancelled for " |
| 408 | "action_code=%u", action_code); |
| 409 | |
| 410 | /* Cancel Timeout registered */ |
| 411 | eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer); |
| 412 | |
| 413 | /* free all resources meant for retry */ |
| 414 | os_free(peer->sm_tmr.buf); |
| 415 | peer->sm_tmr.buf = NULL; |
| 416 | |
| 417 | peer->sm_tmr.count = 0; |
| 418 | peer->sm_tmr.timer = 0; |
| 419 | peer->sm_tmr.buf_len = 0; |
| 420 | peer->sm_tmr.action_code = 0xff; |
| 421 | } else { |
| 422 | wpa_printf(MSG_INFO, "TDLS: Error in cancelling retry timeout " |
| 423 | "(Unknown action_code=%u)", action_code); |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | |
| 428 | static void wpa_tdls_generate_tpk(struct wpa_tdls_peer *peer, |
| 429 | const u8 *own_addr, const u8 *bssid) |
| 430 | { |
| 431 | u8 key_input[SHA256_MAC_LEN]; |
| 432 | const u8 *nonce[2]; |
| 433 | size_t len[2]; |
| 434 | u8 data[3 * ETH_ALEN]; |
| 435 | |
Dmitry Shmidt | d2986c2 | 2017-10-23 14:22:09 -0700 | [diff] [blame] | 436 | /* IEEE Std 802.11-2016 12.7.9.2: |
| 437 | * TPK-Key-Input = Hash(min(SNonce, ANonce) || max(SNonce, ANonce)) |
| 438 | * Hash = SHA-256 for TDLS |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 439 | */ |
| 440 | len[0] = WPA_NONCE_LEN; |
| 441 | len[1] = WPA_NONCE_LEN; |
| 442 | if (os_memcmp(peer->inonce, peer->rnonce, WPA_NONCE_LEN) < 0) { |
| 443 | nonce[0] = peer->inonce; |
| 444 | nonce[1] = peer->rnonce; |
| 445 | } else { |
| 446 | nonce[0] = peer->rnonce; |
| 447 | nonce[1] = peer->inonce; |
| 448 | } |
| 449 | wpa_hexdump(MSG_DEBUG, "TDLS: min(Nonce)", nonce[0], WPA_NONCE_LEN); |
| 450 | wpa_hexdump(MSG_DEBUG, "TDLS: max(Nonce)", nonce[1], WPA_NONCE_LEN); |
| 451 | sha256_vector(2, nonce, len, key_input); |
| 452 | wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-Key-Input", |
| 453 | key_input, SHA256_MAC_LEN); |
| 454 | |
| 455 | /* |
Dmitry Shmidt | d2986c2 | 2017-10-23 14:22:09 -0700 | [diff] [blame] | 456 | * TPK = KDF-Hash-Length(TPK-Key-Input, "TDLS PMK", |
| 457 | * min(MAC_I, MAC_R) || max(MAC_I, MAC_R) || BSSID) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 458 | */ |
| 459 | |
| 460 | if (os_memcmp(own_addr, peer->addr, ETH_ALEN) < 0) { |
| 461 | os_memcpy(data, own_addr, ETH_ALEN); |
| 462 | os_memcpy(data + ETH_ALEN, peer->addr, ETH_ALEN); |
| 463 | } else { |
| 464 | os_memcpy(data, peer->addr, ETH_ALEN); |
| 465 | os_memcpy(data + ETH_ALEN, own_addr, ETH_ALEN); |
| 466 | } |
| 467 | os_memcpy(data + 2 * ETH_ALEN, bssid, ETH_ALEN); |
| 468 | wpa_hexdump(MSG_DEBUG, "TDLS: KDF Context", data, sizeof(data)); |
| 469 | |
| 470 | sha256_prf(key_input, SHA256_MAC_LEN, "TDLS PMK", data, sizeof(data), |
| 471 | (u8 *) &peer->tpk, sizeof(peer->tpk)); |
| 472 | wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-KCK", |
| 473 | peer->tpk.kck, sizeof(peer->tpk.kck)); |
| 474 | wpa_hexdump_key(MSG_DEBUG, "TDLS: TPK-TK", |
| 475 | peer->tpk.tk, sizeof(peer->tpk.tk)); |
| 476 | peer->tpk_set = 1; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | /** |
| 481 | * wpa_tdls_ftie_mic - Calculate TDLS FTIE MIC |
| 482 | * @kck: TPK-KCK |
| 483 | * @lnkid: Pointer to the beginning of Link Identifier IE |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 484 | * @rsne: Pointer to the beginning of RSNE used for handshake |
| 485 | * @rsne_len: Length of RSNE in octets |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 486 | * @timeoutie: Pointer to the beginning of Timeout IE used for handshake |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 487 | * @fte: Pointer to the beginning of FTE |
| 488 | * @fre_len: Length of FTE in octets |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 489 | * @mic: Pointer for writing MIC |
| 490 | * |
| 491 | * Calculate MIC for TDLS frame. |
| 492 | */ |
| 493 | static int wpa_tdls_ftie_mic(const u8 *kck, u8 trans_seq, const u8 *lnkid, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 494 | const u8 *rsne, size_t rsne_len, |
| 495 | const u8 *timeoutie, |
| 496 | const u8 *fte, size_t fte_len, u8 *mic) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 497 | { |
| 498 | u8 *buf, *pos; |
| 499 | struct wpa_tdls_ftie *_ftie; |
| 500 | const struct wpa_tdls_lnkid *_lnkid; |
| 501 | int ret; |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 502 | int len = 2 * ETH_ALEN + 1 + 2 + lnkid[1] + rsne_len + |
| 503 | 2 + timeoutie[1] + fte_len; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 504 | buf = os_zalloc(len); |
| 505 | if (!buf) { |
| 506 | wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation"); |
| 507 | return -1; |
| 508 | } |
| 509 | |
| 510 | pos = buf; |
| 511 | _lnkid = (const struct wpa_tdls_lnkid *) lnkid; |
| 512 | /* 1) TDLS initiator STA MAC address */ |
| 513 | os_memcpy(pos, _lnkid->init_sta, ETH_ALEN); |
| 514 | pos += ETH_ALEN; |
| 515 | /* 2) TDLS responder STA MAC address */ |
| 516 | os_memcpy(pos, _lnkid->resp_sta, ETH_ALEN); |
| 517 | pos += ETH_ALEN; |
| 518 | /* 3) Transaction Sequence number */ |
| 519 | *pos++ = trans_seq; |
| 520 | /* 4) Link Identifier IE */ |
| 521 | os_memcpy(pos, lnkid, 2 + lnkid[1]); |
| 522 | pos += 2 + lnkid[1]; |
| 523 | /* 5) RSN IE */ |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 524 | os_memcpy(pos, rsne, rsne_len); |
| 525 | pos += rsne_len; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 526 | /* 6) Timeout Interval IE */ |
| 527 | os_memcpy(pos, timeoutie, 2 + timeoutie[1]); |
| 528 | pos += 2 + timeoutie[1]; |
| 529 | /* 7) FTIE, with the MIC field of the FTIE set to 0 */ |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 530 | os_memcpy(pos, fte, fte_len); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 531 | _ftie = (struct wpa_tdls_ftie *) pos; |
| 532 | os_memset(_ftie->mic, 0, TDLS_MIC_LEN); |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 533 | pos += fte_len; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 534 | |
| 535 | wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf); |
| 536 | wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16); |
| 537 | ret = omac1_aes_128(kck, buf, pos - buf, mic); |
| 538 | os_free(buf); |
| 539 | wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16); |
| 540 | return ret; |
| 541 | } |
| 542 | |
| 543 | |
| 544 | /** |
| 545 | * wpa_tdls_key_mic_teardown - Calculate TDLS FTIE MIC for Teardown frame |
| 546 | * @kck: TPK-KCK |
| 547 | * @trans_seq: Transaction Sequence Number (4 - Teardown) |
| 548 | * @rcode: Reason code for Teardown |
| 549 | * @dtoken: Dialog Token used for that particular link |
| 550 | * @lnkid: Pointer to the beginning of Link Identifier IE |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 551 | * @fte: Pointer to the beginning of FTE |
| 552 | * @fre_len: Length of FTE in octets |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 553 | * @mic: Pointer for writing MIC |
| 554 | * |
| 555 | * Calculate MIC for TDLS frame. |
| 556 | */ |
| 557 | static int wpa_tdls_key_mic_teardown(const u8 *kck, u8 trans_seq, u16 rcode, |
| 558 | u8 dtoken, const u8 *lnkid, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 559 | const u8 *fte, size_t fte_len, u8 *mic) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 560 | { |
| 561 | u8 *buf, *pos; |
| 562 | struct wpa_tdls_ftie *_ftie; |
| 563 | int ret; |
| 564 | int len; |
| 565 | |
| 566 | if (lnkid == NULL) |
| 567 | return -1; |
| 568 | |
| 569 | len = 2 + lnkid[1] + sizeof(rcode) + sizeof(dtoken) + |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 570 | sizeof(trans_seq) + fte_len; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 571 | |
| 572 | buf = os_zalloc(len); |
| 573 | if (!buf) { |
| 574 | wpa_printf(MSG_WARNING, "TDLS: No memory for MIC calculation"); |
| 575 | return -1; |
| 576 | } |
| 577 | |
| 578 | pos = buf; |
| 579 | /* 1) Link Identifier IE */ |
| 580 | os_memcpy(pos, lnkid, 2 + lnkid[1]); |
| 581 | pos += 2 + lnkid[1]; |
| 582 | /* 2) Reason Code */ |
| 583 | WPA_PUT_LE16(pos, rcode); |
| 584 | pos += sizeof(rcode); |
| 585 | /* 3) Dialog token */ |
| 586 | *pos++ = dtoken; |
| 587 | /* 4) Transaction Sequence number */ |
| 588 | *pos++ = trans_seq; |
| 589 | /* 7) FTIE, with the MIC field of the FTIE set to 0 */ |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 590 | os_memcpy(pos, fte, fte_len); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 591 | _ftie = (struct wpa_tdls_ftie *) pos; |
| 592 | os_memset(_ftie->mic, 0, TDLS_MIC_LEN); |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 593 | pos += fte_len; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 594 | |
| 595 | wpa_hexdump(MSG_DEBUG, "TDLS: Data for FTIE MIC", buf, pos - buf); |
| 596 | wpa_hexdump_key(MSG_DEBUG, "TDLS: KCK", kck, 16); |
| 597 | ret = omac1_aes_128(kck, buf, pos - buf, mic); |
| 598 | os_free(buf); |
| 599 | wpa_hexdump(MSG_DEBUG, "TDLS: FTIE MIC", mic, 16); |
| 600 | return ret; |
| 601 | } |
| 602 | |
| 603 | |
| 604 | static int wpa_supplicant_verify_tdls_mic(u8 trans_seq, |
| 605 | struct wpa_tdls_peer *peer, |
| 606 | const u8 *lnkid, const u8 *timeoutie, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 607 | const struct wpa_tdls_ftie *ftie, |
| 608 | size_t fte_len) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 609 | { |
| 610 | u8 mic[16]; |
| 611 | |
| 612 | if (peer->tpk_set) { |
| 613 | wpa_tdls_ftie_mic(peer->tpk.kck, trans_seq, lnkid, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 614 | peer->rsnie_p, peer->rsnie_p_len, timeoutie, |
| 615 | (const u8 *) ftie, fte_len, mic); |
Dmitry Shmidt | c281702 | 2014-07-02 10:32:10 -0700 | [diff] [blame] | 616 | if (os_memcmp_const(mic, ftie->mic, 16) != 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 617 | wpa_printf(MSG_INFO, "TDLS: Invalid MIC in FTIE - " |
| 618 | "dropping packet"); |
| 619 | wpa_hexdump(MSG_DEBUG, "TDLS: Received MIC", |
| 620 | ftie->mic, 16); |
| 621 | wpa_hexdump(MSG_DEBUG, "TDLS: Calculated MIC", |
| 622 | mic, 16); |
| 623 | return -1; |
| 624 | } |
| 625 | } else { |
| 626 | wpa_printf(MSG_WARNING, "TDLS: Could not verify TDLS MIC, " |
| 627 | "TPK not set - dropping packet"); |
| 628 | return -1; |
| 629 | } |
| 630 | return 0; |
| 631 | } |
| 632 | |
| 633 | |
| 634 | static int wpa_supplicant_verify_tdls_mic_teardown( |
| 635 | u8 trans_seq, u16 rcode, u8 dtoken, struct wpa_tdls_peer *peer, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 636 | const u8 *lnkid, const struct wpa_tdls_ftie *ftie, size_t fte_len) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 637 | { |
| 638 | u8 mic[16]; |
| 639 | |
| 640 | if (peer->tpk_set) { |
| 641 | wpa_tdls_key_mic_teardown(peer->tpk.kck, trans_seq, rcode, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 642 | dtoken, lnkid, (const u8 *) ftie, |
| 643 | fte_len, mic); |
Dmitry Shmidt | c281702 | 2014-07-02 10:32:10 -0700 | [diff] [blame] | 644 | if (os_memcmp_const(mic, ftie->mic, 16) != 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 645 | wpa_printf(MSG_INFO, "TDLS: Invalid MIC in Teardown - " |
| 646 | "dropping packet"); |
| 647 | return -1; |
| 648 | } |
| 649 | } else { |
| 650 | wpa_printf(MSG_INFO, "TDLS: Could not verify TDLS Teardown " |
| 651 | "MIC, TPK not set - dropping packet"); |
| 652 | return -1; |
| 653 | } |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | |
| 658 | static void wpa_tdls_tpk_timeout(void *eloop_ctx, void *timeout_ctx) |
| 659 | { |
| 660 | struct wpa_sm *sm = eloop_ctx; |
| 661 | struct wpa_tdls_peer *peer = timeout_ctx; |
| 662 | |
| 663 | /* |
| 664 | * On TPK lifetime expiration, we have an option of either tearing down |
| 665 | * the direct link or trying to re-initiate it. The selection of what |
| 666 | * to do is not strictly speaking controlled by our role in the expired |
| 667 | * link, but for now, use that to select whether to renew or tear down |
| 668 | * the link. |
| 669 | */ |
| 670 | |
| 671 | if (peer->initiator) { |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 672 | u8 addr[ETH_ALEN]; |
| 673 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 674 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR |
| 675 | " - try to renew", MAC2STR(peer->addr)); |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 676 | /* cache the peer address before do_teardown */ |
| 677 | os_memcpy(addr, peer->addr, ETH_ALEN); |
| 678 | wpa_tdls_do_teardown(sm, peer, |
| 679 | WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED); |
| 680 | wpa_tdls_start(sm, addr); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 681 | } else { |
| 682 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime expired for " MACSTR |
| 683 | " - tear down", MAC2STR(peer->addr)); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 684 | wpa_tdls_do_teardown(sm, peer, |
Sunil Dutt | 6a9f522 | 2013-09-30 17:10:18 +0300 | [diff] [blame] | 685 | WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 686 | } |
| 687 | } |
| 688 | |
| 689 | |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 690 | static void wpa_tdls_peer_remove_from_list(struct wpa_sm *sm, |
| 691 | struct wpa_tdls_peer *peer) |
| 692 | { |
| 693 | struct wpa_tdls_peer *cur, *prev; |
| 694 | |
| 695 | cur = sm->tdls; |
| 696 | prev = NULL; |
| 697 | while (cur && cur != peer) { |
| 698 | prev = cur; |
| 699 | cur = cur->next; |
| 700 | } |
| 701 | |
| 702 | if (cur != peer) { |
| 703 | wpa_printf(MSG_ERROR, "TDLS: Could not find peer " MACSTR |
| 704 | " to remove it from the list", |
| 705 | MAC2STR(peer->addr)); |
| 706 | return; |
| 707 | } |
| 708 | |
| 709 | if (prev) |
| 710 | prev->next = peer->next; |
| 711 | else |
| 712 | sm->tdls = peer->next; |
| 713 | } |
| 714 | |
| 715 | |
| 716 | static void wpa_tdls_peer_clear(struct wpa_sm *sm, struct wpa_tdls_peer *peer) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 717 | { |
| 718 | wpa_printf(MSG_DEBUG, "TDLS: Clear state for peer " MACSTR, |
| 719 | MAC2STR(peer->addr)); |
| 720 | eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer); |
| 721 | eloop_cancel_timeout(wpa_tdls_tpk_retry_timeout, sm, peer); |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 722 | peer->reconfig_key = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 723 | peer->initiator = 0; |
Sunil Dutt | 73b28cc | 2013-09-30 17:38:41 +0300 | [diff] [blame] | 724 | peer->tpk_in_progress = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 725 | os_free(peer->sm_tmr.buf); |
| 726 | peer->sm_tmr.buf = NULL; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 727 | os_free(peer->ht_capabilities); |
| 728 | peer->ht_capabilities = NULL; |
Dmitry Shmidt | 33e38bf | 2013-02-27 12:56:00 -0800 | [diff] [blame] | 729 | os_free(peer->vht_capabilities); |
| 730 | peer->vht_capabilities = NULL; |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 731 | os_free(peer->he_capabilities); |
| 732 | peer->he_capabilities = NULL; |
| 733 | os_free(peer->he_6ghz_band_capabilities); |
| 734 | peer->he_6ghz_band_capabilities = NULL; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 735 | os_free(peer->eht_capabilities); |
| 736 | peer->eht_capabilities = NULL; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 737 | os_free(peer->ext_capab); |
| 738 | peer->ext_capab = NULL; |
Dmitry Shmidt | 344abd3 | 2014-01-14 13:17:00 -0800 | [diff] [blame] | 739 | os_free(peer->supp_channels); |
| 740 | peer->supp_channels = NULL; |
| 741 | os_free(peer->supp_oper_classes); |
| 742 | peer->supp_oper_classes = NULL; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 743 | peer->rsnie_i_len = peer->rsnie_p_len = 0; |
| 744 | peer->cipher = 0; |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 745 | peer->qos_info = 0; |
| 746 | peer->wmm_capable = 0; |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 747 | peer->tk_set = peer->tpk_set = peer->tpk_success = 0; |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 748 | peer->chan_switch_enabled = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 749 | os_memset(&peer->tpk, 0, sizeof(peer->tpk)); |
| 750 | os_memset(peer->inonce, 0, WPA_NONCE_LEN); |
| 751 | os_memset(peer->rnonce, 0, WPA_NONCE_LEN); |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 752 | peer->mld_link_id = -1; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 753 | } |
| 754 | |
| 755 | |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 756 | static void wpa_tdls_peer_free(struct wpa_sm *sm, struct wpa_tdls_peer *peer) |
| 757 | { |
| 758 | wpa_tdls_peer_clear(sm, peer); |
| 759 | wpa_tdls_peer_remove_from_list(sm, peer); |
| 760 | os_free(peer); |
| 761 | } |
| 762 | |
| 763 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 764 | static void wpa_tdls_linkid(struct wpa_sm *sm, struct wpa_tdls_peer *peer, |
| 765 | struct wpa_tdls_lnkid *lnkid) |
| 766 | { |
| 767 | lnkid->ie_type = WLAN_EID_LINK_ID; |
| 768 | lnkid->ie_len = 3 * ETH_ALEN; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 769 | os_memcpy(lnkid->bssid, wpa_tdls_get_link_bssid(sm, peer->mld_link_id), |
| 770 | ETH_ALEN); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 771 | if (peer->initiator) { |
| 772 | os_memcpy(lnkid->init_sta, sm->own_addr, ETH_ALEN); |
| 773 | os_memcpy(lnkid->resp_sta, peer->addr, ETH_ALEN); |
| 774 | } else { |
| 775 | os_memcpy(lnkid->init_sta, peer->addr, ETH_ALEN); |
| 776 | os_memcpy(lnkid->resp_sta, sm->own_addr, ETH_ALEN); |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | |
Dmitry Shmidt | b58836e | 2014-04-29 14:35:56 -0700 | [diff] [blame] | 781 | static int wpa_tdls_send_teardown(struct wpa_sm *sm, const u8 *addr, |
| 782 | u16 reason_code) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 783 | { |
| 784 | struct wpa_tdls_peer *peer; |
| 785 | struct wpa_tdls_ftie *ftie; |
| 786 | struct wpa_tdls_lnkid lnkid; |
| 787 | u8 dialog_token; |
| 788 | u8 *rbuf, *pos; |
| 789 | int ielen; |
| 790 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 791 | if (sm->tdls_disabled || !sm->tdls_supported) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 792 | return -1; |
| 793 | |
| 794 | /* Find the node and free from the list */ |
| 795 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 796 | if (ether_addr_equal(peer->addr, addr)) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 797 | break; |
| 798 | } |
| 799 | |
| 800 | if (peer == NULL) { |
| 801 | wpa_printf(MSG_INFO, "TDLS: No matching entry found for " |
| 802 | "Teardown " MACSTR, MAC2STR(addr)); |
| 803 | return 0; |
| 804 | } |
| 805 | |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 806 | /* Cancel active channel switch before teardown */ |
| 807 | if (peer->chan_switch_enabled) { |
| 808 | wpa_printf(MSG_DEBUG, "TDLS: First returning link with " MACSTR |
| 809 | " to base channel", MAC2STR(addr)); |
| 810 | wpa_sm_tdls_disable_channel_switch(sm, peer->addr); |
| 811 | } |
| 812 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 813 | dialog_token = peer->dtoken; |
| 814 | |
| 815 | wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown for " MACSTR, |
| 816 | MAC2STR(addr)); |
| 817 | |
| 818 | ielen = 0; |
| 819 | if (wpa_tdls_get_privacy(sm) && peer->tpk_set && peer->tpk_success) { |
| 820 | /* To add FTIE for Teardown request and compute MIC */ |
| 821 | ielen += sizeof(*ftie); |
| 822 | #ifdef CONFIG_TDLS_TESTING |
| 823 | if (tdls_testing & TDLS_TESTING_LONG_FRAME) |
| 824 | ielen += 170; |
| 825 | #endif /* CONFIG_TDLS_TESTING */ |
| 826 | } |
| 827 | |
| 828 | rbuf = os_zalloc(ielen + 1); |
| 829 | if (rbuf == NULL) |
| 830 | return -1; |
| 831 | pos = rbuf; |
| 832 | |
Dmitry Shmidt | 51b6ea8 | 2013-05-08 10:42:09 -0700 | [diff] [blame] | 833 | if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 834 | goto skip_ies; |
| 835 | |
| 836 | ftie = (struct wpa_tdls_ftie *) pos; |
| 837 | ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION; |
| 838 | /* Using the recent nonce which should be for CONFIRM frame */ |
| 839 | os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN); |
| 840 | os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN); |
| 841 | ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2; |
| 842 | pos = (u8 *) (ftie + 1); |
| 843 | #ifdef CONFIG_TDLS_TESTING |
| 844 | if (tdls_testing & TDLS_TESTING_LONG_FRAME) { |
| 845 | wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to " |
| 846 | "FTIE"); |
| 847 | ftie->ie_len += 170; |
| 848 | *pos++ = 255; /* FTIE subelem */ |
| 849 | *pos++ = 168; /* FTIE subelem length */ |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 850 | pos += 168; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 851 | } |
| 852 | #endif /* CONFIG_TDLS_TESTING */ |
| 853 | wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TDLS Teardown handshake", |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 854 | (u8 *) ftie, pos - (u8 *) ftie); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 855 | |
| 856 | /* compute MIC before sending */ |
| 857 | wpa_tdls_linkid(sm, peer, &lnkid); |
| 858 | wpa_tdls_key_mic_teardown(peer->tpk.kck, 4, reason_code, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 859 | dialog_token, (const u8 *) &lnkid, |
| 860 | (const u8 *) ftie, 2 + ftie->ie_len, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 861 | ftie->mic); |
| 862 | |
| 863 | skip_ies: |
| 864 | /* TODO: register for a Timeout handler, if Teardown is not received at |
| 865 | * the other end, then try again another time */ |
| 866 | |
| 867 | /* request driver to send Teardown using this FTIE */ |
| 868 | wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_TEARDOWN, 0, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 869 | reason_code, 0, peer->initiator, rbuf, pos - rbuf, |
| 870 | -1); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 871 | os_free(rbuf); |
| 872 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 873 | return 0; |
| 874 | } |
| 875 | |
| 876 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 877 | int wpa_tdls_teardown_link(struct wpa_sm *sm, const u8 *addr, u16 reason_code) |
| 878 | { |
| 879 | struct wpa_tdls_peer *peer; |
| 880 | |
| 881 | if (sm->tdls_disabled || !sm->tdls_supported) |
| 882 | return -1; |
| 883 | |
| 884 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 885 | if (ether_addr_equal(peer->addr, addr)) |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 886 | break; |
| 887 | } |
| 888 | |
| 889 | if (peer == NULL) { |
| 890 | wpa_printf(MSG_DEBUG, "TDLS: Could not find peer " MACSTR |
| 891 | " for link Teardown", MAC2STR(addr)); |
| 892 | return -1; |
| 893 | } |
| 894 | |
| 895 | if (!peer->tpk_success) { |
| 896 | wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR |
| 897 | " not connected - cannot Teardown link", MAC2STR(addr)); |
| 898 | return -1; |
| 899 | } |
| 900 | |
Sunil Dutt | 6a9f522 | 2013-09-30 17:10:18 +0300 | [diff] [blame] | 901 | return wpa_tdls_do_teardown(sm, peer, reason_code); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | |
Sunil Dutt | 38ffd88 | 2013-09-30 17:23:23 +0300 | [diff] [blame] | 905 | static void wpa_tdls_disable_peer_link(struct wpa_sm *sm, |
| 906 | struct wpa_tdls_peer *peer) |
| 907 | { |
| 908 | wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr); |
| 909 | wpa_tdls_peer_free(sm, peer); |
| 910 | } |
| 911 | |
| 912 | |
Dmitry Shmidt | 43cb578 | 2014-06-16 16:23:22 -0700 | [diff] [blame] | 913 | void wpa_tdls_disable_unreachable_link(struct wpa_sm *sm, const u8 *addr) |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 914 | { |
| 915 | struct wpa_tdls_peer *peer; |
| 916 | |
| 917 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 918 | if (ether_addr_equal(peer->addr, addr)) |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 919 | break; |
| 920 | } |
| 921 | |
Dmitry Shmidt | 43cb578 | 2014-06-16 16:23:22 -0700 | [diff] [blame] | 922 | if (!peer || !peer->tpk_success) { |
| 923 | wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR |
| 924 | " not connected - cannot teardown unreachable link", |
| 925 | MAC2STR(addr)); |
| 926 | return; |
| 927 | } |
| 928 | |
| 929 | if (wpa_tdls_is_external_setup(sm)) { |
| 930 | /* |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 931 | * Get us on the base channel, disable the link, send a |
| 932 | * teardown packet through the AP, and then reset link data. |
Dmitry Shmidt | 43cb578 | 2014-06-16 16:23:22 -0700 | [diff] [blame] | 933 | */ |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 934 | if (peer->chan_switch_enabled) |
| 935 | wpa_sm_tdls_disable_channel_switch(sm, peer->addr); |
Dmitry Shmidt | 43cb578 | 2014-06-16 16:23:22 -0700 | [diff] [blame] | 936 | wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, addr); |
| 937 | wpa_tdls_send_teardown(sm, addr, |
| 938 | WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE); |
| 939 | wpa_tdls_peer_free(sm, peer); |
| 940 | } else { |
Sunil Dutt | 38ffd88 | 2013-09-30 17:23:23 +0300 | [diff] [blame] | 941 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 43cb578 | 2014-06-16 16:23:22 -0700 | [diff] [blame] | 942 | } |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | |
Dmitry Shmidt | e0e48dc | 2013-11-18 12:00:06 -0800 | [diff] [blame] | 946 | const char * wpa_tdls_get_link_status(struct wpa_sm *sm, const u8 *addr) |
| 947 | { |
| 948 | struct wpa_tdls_peer *peer; |
| 949 | |
| 950 | if (sm->tdls_disabled || !sm->tdls_supported) |
| 951 | return "disabled"; |
| 952 | |
| 953 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 954 | if (ether_addr_equal(peer->addr, addr)) |
Dmitry Shmidt | e0e48dc | 2013-11-18 12:00:06 -0800 | [diff] [blame] | 955 | break; |
| 956 | } |
| 957 | |
| 958 | if (peer == NULL) |
| 959 | return "peer does not exist"; |
| 960 | |
| 961 | if (!peer->tpk_success) |
| 962 | return "peer not connected"; |
| 963 | |
| 964 | return "connected"; |
| 965 | } |
| 966 | |
| 967 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 968 | static int wpa_tdls_recv_teardown(struct wpa_sm *sm, const u8 *src_addr, |
| 969 | const u8 *buf, size_t len) |
| 970 | { |
| 971 | struct wpa_tdls_peer *peer = NULL; |
| 972 | struct wpa_tdls_ftie *ftie; |
| 973 | struct wpa_tdls_lnkid *lnkid; |
| 974 | struct wpa_eapol_ie_parse kde; |
| 975 | u16 reason_code; |
| 976 | const u8 *pos; |
| 977 | int ielen; |
| 978 | |
| 979 | /* Find the node and free from the list */ |
| 980 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 981 | if (ether_addr_equal(peer->addr, src_addr)) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 982 | break; |
| 983 | } |
| 984 | |
| 985 | if (peer == NULL) { |
| 986 | wpa_printf(MSG_INFO, "TDLS: No matching entry found for " |
| 987 | "Teardown " MACSTR, MAC2STR(src_addr)); |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | pos = buf; |
| 992 | pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */; |
| 993 | |
| 994 | reason_code = WPA_GET_LE16(pos); |
| 995 | pos += 2; |
| 996 | |
| 997 | wpa_printf(MSG_DEBUG, "TDLS: TDLS Teardown Request from " MACSTR |
| 998 | " (reason code %u)", MAC2STR(src_addr), reason_code); |
| 999 | |
| 1000 | ielen = len - (pos - buf); /* start of IE in buf */ |
Dmitry Shmidt | 7f65602 | 2015-02-25 14:36:37 -0800 | [diff] [blame] | 1001 | |
| 1002 | /* |
| 1003 | * Don't reject the message if failing to parse IEs. The IEs we need are |
| 1004 | * explicitly checked below. Some APs may add arbitrary padding to the |
| 1005 | * end of short TDLS frames and that would look like invalid IEs. |
| 1006 | */ |
| 1007 | if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) |
| 1008 | wpa_printf(MSG_DEBUG, |
| 1009 | "TDLS: Failed to parse IEs in Teardown - ignore as an interop workaround"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1010 | |
| 1011 | if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) { |
| 1012 | wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TDLS " |
| 1013 | "Teardown"); |
| 1014 | return -1; |
| 1015 | } |
| 1016 | lnkid = (struct wpa_tdls_lnkid *) kde.lnkid; |
| 1017 | |
| 1018 | if (!wpa_tdls_get_privacy(sm) || !peer->tpk_set || !peer->tpk_success) |
| 1019 | goto skip_ftie; |
| 1020 | |
| 1021 | if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) { |
| 1022 | wpa_printf(MSG_INFO, "TDLS: No FTIE in TDLS Teardown"); |
| 1023 | return -1; |
| 1024 | } |
| 1025 | |
| 1026 | ftie = (struct wpa_tdls_ftie *) kde.ftie; |
| 1027 | |
| 1028 | /* Process MIC check to see if TDLS Teardown is right */ |
| 1029 | if (wpa_supplicant_verify_tdls_mic_teardown(4, reason_code, |
| 1030 | peer->dtoken, peer, |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 1031 | (const u8 *) lnkid, |
| 1032 | ftie, kde.ftie_len) < 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1033 | wpa_printf(MSG_DEBUG, "TDLS: MIC failure for TDLS " |
| 1034 | "Teardown Request from " MACSTR, MAC2STR(src_addr)); |
| 1035 | return -1; |
| 1036 | } |
| 1037 | |
| 1038 | skip_ftie: |
| 1039 | /* |
| 1040 | * Request the driver to disable the direct link and clear associated |
| 1041 | * keys. |
| 1042 | */ |
Sunil Dutt | 38ffd88 | 2013-09-30 17:23:23 +0300 | [diff] [blame] | 1043 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1044 | return 0; |
| 1045 | } |
| 1046 | |
| 1047 | |
| 1048 | /** |
| 1049 | * wpa_tdls_send_error - To send suitable TDLS status response with |
| 1050 | * appropriate status code mentioning reason for error/failure. |
| 1051 | * @dst - MAC addr of Peer station |
| 1052 | * @tdls_action - TDLS frame type for which error code is sent |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 1053 | * @initiator - was this end the initiator of the connection |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1054 | * @status - status code mentioning reason |
| 1055 | */ |
| 1056 | |
| 1057 | static int wpa_tdls_send_error(struct wpa_sm *sm, const u8 *dst, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 1058 | u8 tdls_action, u8 dialog_token, int initiator, |
| 1059 | u16 status) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1060 | { |
| 1061 | wpa_printf(MSG_DEBUG, "TDLS: Sending error to " MACSTR |
| 1062 | " (action=%u status=%u)", |
| 1063 | MAC2STR(dst), tdls_action, status); |
| 1064 | return wpa_tdls_tpk_send(sm, dst, tdls_action, dialog_token, status, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1065 | 0, initiator, NULL, 0, -1); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1066 | } |
| 1067 | |
| 1068 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1069 | static struct wpa_tdls_peer * |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 1070 | wpa_tdls_add_peer(struct wpa_sm *sm, const u8 *addr, int *existing) |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1071 | { |
| 1072 | struct wpa_tdls_peer *peer; |
| 1073 | |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 1074 | if (existing) |
| 1075 | *existing = 0; |
| 1076 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 1077 | if (ether_addr_equal(peer->addr, addr)) { |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 1078 | if (existing) |
| 1079 | *existing = 1; |
| 1080 | return peer; /* re-use existing entry */ |
| 1081 | } |
| 1082 | } |
| 1083 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1084 | wpa_printf(MSG_INFO, "TDLS: Creating peer entry for " MACSTR, |
| 1085 | MAC2STR(addr)); |
| 1086 | |
| 1087 | peer = os_zalloc(sizeof(*peer)); |
| 1088 | if (peer == NULL) |
| 1089 | return NULL; |
| 1090 | |
| 1091 | os_memcpy(peer->addr, addr, ETH_ALEN); |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1092 | peer->mld_link_id = -1; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1093 | peer->next = sm->tdls; |
| 1094 | sm->tdls = peer; |
| 1095 | |
| 1096 | return peer; |
| 1097 | } |
| 1098 | |
| 1099 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1100 | static int wpa_tdls_send_tpk_m1(struct wpa_sm *sm, |
| 1101 | struct wpa_tdls_peer *peer) |
| 1102 | { |
| 1103 | size_t buf_len; |
| 1104 | struct wpa_tdls_timeoutie timeoutie; |
| 1105 | u16 rsn_capab; |
| 1106 | struct wpa_tdls_ftie *ftie; |
| 1107 | u8 *rbuf, *pos, *count_pos; |
| 1108 | u16 count; |
| 1109 | struct rsn_ie_hdr *hdr; |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1110 | int status; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1111 | |
| 1112 | if (!wpa_tdls_get_privacy(sm)) { |
| 1113 | wpa_printf(MSG_DEBUG, "TDLS: No security used on the link"); |
| 1114 | peer->rsnie_i_len = 0; |
| 1115 | goto skip_rsnie; |
| 1116 | } |
| 1117 | |
| 1118 | /* |
| 1119 | * TPK Handshake Message 1: |
| 1120 | * FTIE: ANonce=0, SNonce=initiator nonce MIC=0, DataKDs=(RSNIE_I, |
| 1121 | * Timeout Interval IE)) |
| 1122 | */ |
| 1123 | |
| 1124 | /* Filling RSN IE */ |
| 1125 | hdr = (struct rsn_ie_hdr *) peer->rsnie_i; |
| 1126 | hdr->elem_id = WLAN_EID_RSN; |
| 1127 | WPA_PUT_LE16(hdr->version, RSN_VERSION); |
| 1128 | |
| 1129 | pos = (u8 *) (hdr + 1); |
| 1130 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); |
| 1131 | pos += RSN_SELECTOR_LEN; |
| 1132 | count_pos = pos; |
| 1133 | pos += 2; |
| 1134 | |
| 1135 | count = 0; |
| 1136 | |
| 1137 | /* |
| 1138 | * AES-CCMP is the default Encryption preferred for TDLS, so |
| 1139 | * RSN IE is filled only with CCMP CIPHER |
| 1140 | * Note: TKIP is not used to encrypt TDLS link. |
| 1141 | * |
| 1142 | * Regardless of the cipher used on the AP connection, select CCMP |
| 1143 | * here. |
| 1144 | */ |
| 1145 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); |
| 1146 | pos += RSN_SELECTOR_LEN; |
| 1147 | count++; |
| 1148 | |
| 1149 | WPA_PUT_LE16(count_pos, count); |
| 1150 | |
| 1151 | WPA_PUT_LE16(pos, 1); |
| 1152 | pos += 2; |
| 1153 | RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE); |
| 1154 | pos += RSN_SELECTOR_LEN; |
| 1155 | |
| 1156 | rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED; |
| 1157 | rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2; |
| 1158 | #ifdef CONFIG_TDLS_TESTING |
| 1159 | if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) { |
| 1160 | wpa_printf(MSG_DEBUG, "TDLS: Use alternative RSN IE for " |
| 1161 | "testing"); |
| 1162 | rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED; |
| 1163 | } |
| 1164 | #endif /* CONFIG_TDLS_TESTING */ |
| 1165 | WPA_PUT_LE16(pos, rsn_capab); |
| 1166 | pos += 2; |
| 1167 | #ifdef CONFIG_TDLS_TESTING |
| 1168 | if (tdls_testing & TDLS_TESTING_ALT_RSN_IE) { |
| 1169 | /* Number of PMKIDs */ |
| 1170 | *pos++ = 0x00; |
| 1171 | *pos++ = 0x00; |
| 1172 | } |
| 1173 | #endif /* CONFIG_TDLS_TESTING */ |
| 1174 | |
| 1175 | hdr->len = (pos - peer->rsnie_i) - 2; |
| 1176 | peer->rsnie_i_len = pos - peer->rsnie_i; |
| 1177 | wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake", |
| 1178 | peer->rsnie_i, peer->rsnie_i_len); |
| 1179 | |
| 1180 | skip_rsnie: |
| 1181 | buf_len = 0; |
| 1182 | if (wpa_tdls_get_privacy(sm)) |
| 1183 | buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) + |
| 1184 | sizeof(struct wpa_tdls_timeoutie); |
| 1185 | #ifdef CONFIG_TDLS_TESTING |
| 1186 | if (wpa_tdls_get_privacy(sm) && |
| 1187 | (tdls_testing & TDLS_TESTING_LONG_FRAME)) |
| 1188 | buf_len += 170; |
| 1189 | if (tdls_testing & TDLS_TESTING_DIFF_BSSID) |
| 1190 | buf_len += sizeof(struct wpa_tdls_lnkid); |
| 1191 | #endif /* CONFIG_TDLS_TESTING */ |
| 1192 | rbuf = os_zalloc(buf_len + 1); |
| 1193 | if (rbuf == NULL) { |
| 1194 | wpa_tdls_peer_free(sm, peer); |
Hai Shalom | 6084025 | 2021-02-19 19:02:11 -0800 | [diff] [blame] | 1195 | return -2; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1196 | } |
| 1197 | pos = rbuf; |
| 1198 | |
| 1199 | if (!wpa_tdls_get_privacy(sm)) |
| 1200 | goto skip_ies; |
| 1201 | |
| 1202 | /* Initiator RSN IE */ |
| 1203 | pos = wpa_add_ie(pos, peer->rsnie_i, peer->rsnie_i_len); |
| 1204 | |
| 1205 | ftie = (struct wpa_tdls_ftie *) pos; |
| 1206 | ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION; |
| 1207 | ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2; |
| 1208 | |
| 1209 | if (os_get_random(peer->inonce, WPA_NONCE_LEN)) { |
| 1210 | wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, |
| 1211 | "TDLS: Failed to get random data for initiator Nonce"); |
| 1212 | os_free(rbuf); |
| 1213 | wpa_tdls_peer_free(sm, peer); |
Hai Shalom | 6084025 | 2021-02-19 19:02:11 -0800 | [diff] [blame] | 1214 | return -2; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1215 | } |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 1216 | peer->tk_set = 0; /* A new nonce results in a new TK */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1217 | wpa_hexdump(MSG_DEBUG, "TDLS: Initiator Nonce for TPK handshake", |
| 1218 | peer->inonce, WPA_NONCE_LEN); |
| 1219 | os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN); |
| 1220 | |
| 1221 | wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK Handshake M1", |
| 1222 | (u8 *) ftie, sizeof(struct wpa_tdls_ftie)); |
| 1223 | |
| 1224 | pos = (u8 *) (ftie + 1); |
| 1225 | |
| 1226 | #ifdef CONFIG_TDLS_TESTING |
| 1227 | if (tdls_testing & TDLS_TESTING_LONG_FRAME) { |
| 1228 | wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to " |
| 1229 | "FTIE"); |
| 1230 | ftie->ie_len += 170; |
| 1231 | *pos++ = 255; /* FTIE subelem */ |
| 1232 | *pos++ = 168; /* FTIE subelem length */ |
| 1233 | pos += 168; |
| 1234 | } |
| 1235 | #endif /* CONFIG_TDLS_TESTING */ |
| 1236 | |
| 1237 | /* Lifetime */ |
| 1238 | peer->lifetime = TPK_LIFETIME; |
| 1239 | #ifdef CONFIG_TDLS_TESTING |
| 1240 | if (tdls_testing & TDLS_TESTING_SHORT_LIFETIME) { |
| 1241 | wpa_printf(MSG_DEBUG, "TDLS: Testing - use short TPK " |
| 1242 | "lifetime"); |
| 1243 | peer->lifetime = 301; |
| 1244 | } |
| 1245 | if (tdls_testing & TDLS_TESTING_LONG_LIFETIME) { |
| 1246 | wpa_printf(MSG_DEBUG, "TDLS: Testing - use long TPK " |
| 1247 | "lifetime"); |
| 1248 | peer->lifetime = 0xffffffff; |
| 1249 | } |
| 1250 | #endif /* CONFIG_TDLS_TESTING */ |
| 1251 | pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie, |
| 1252 | sizeof(timeoutie), peer->lifetime); |
| 1253 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", peer->lifetime); |
| 1254 | |
| 1255 | skip_ies: |
| 1256 | |
| 1257 | #ifdef CONFIG_TDLS_TESTING |
| 1258 | if (tdls_testing & TDLS_TESTING_DIFF_BSSID) { |
Paul Stewart | 092955c | 2017-02-06 09:13:09 -0800 | [diff] [blame] | 1259 | struct wpa_tdls_lnkid *l = (struct wpa_tdls_lnkid *) pos; |
| 1260 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1261 | wpa_printf(MSG_DEBUG, "TDLS: Testing - use incorrect BSSID in " |
| 1262 | "Link Identifier"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1263 | wpa_tdls_linkid(sm, peer, l); |
| 1264 | l->bssid[5] ^= 0x01; |
| 1265 | pos += sizeof(*l); |
| 1266 | } |
| 1267 | #endif /* CONFIG_TDLS_TESTING */ |
| 1268 | |
| 1269 | wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Request / TPK " |
| 1270 | "Handshake Message 1 (peer " MACSTR ")", |
| 1271 | MAC2STR(peer->addr)); |
| 1272 | |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1273 | status = wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_SETUP_REQUEST, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1274 | 1, 0, 0, peer->initiator, rbuf, pos - rbuf, |
| 1275 | -1); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1276 | os_free(rbuf); |
| 1277 | |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1278 | return status; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1279 | } |
| 1280 | |
| 1281 | |
| 1282 | static int wpa_tdls_send_tpk_m2(struct wpa_sm *sm, |
| 1283 | const unsigned char *src_addr, u8 dtoken, |
| 1284 | struct wpa_tdls_lnkid *lnkid, |
| 1285 | const struct wpa_tdls_peer *peer) |
| 1286 | { |
| 1287 | u8 *rbuf, *pos; |
| 1288 | size_t buf_len; |
| 1289 | u32 lifetime; |
| 1290 | struct wpa_tdls_timeoutie timeoutie; |
| 1291 | struct wpa_tdls_ftie *ftie; |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1292 | int status; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1293 | |
| 1294 | buf_len = 0; |
| 1295 | if (wpa_tdls_get_privacy(sm)) { |
| 1296 | /* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce), |
| 1297 | * Lifetime */ |
| 1298 | buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) + |
| 1299 | sizeof(struct wpa_tdls_timeoutie); |
| 1300 | #ifdef CONFIG_TDLS_TESTING |
| 1301 | if (tdls_testing & TDLS_TESTING_LONG_FRAME) |
| 1302 | buf_len += 170; |
| 1303 | #endif /* CONFIG_TDLS_TESTING */ |
| 1304 | } |
| 1305 | |
| 1306 | rbuf = os_zalloc(buf_len + 1); |
| 1307 | if (rbuf == NULL) |
| 1308 | return -1; |
| 1309 | pos = rbuf; |
| 1310 | |
| 1311 | if (!wpa_tdls_get_privacy(sm)) |
| 1312 | goto skip_ies; |
| 1313 | |
| 1314 | /* Peer RSN IE */ |
| 1315 | pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len); |
| 1316 | |
| 1317 | ftie = (struct wpa_tdls_ftie *) pos; |
| 1318 | ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION; |
| 1319 | /* TODO: ftie->mic_control to set 2-RESPONSE */ |
| 1320 | os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN); |
| 1321 | os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN); |
| 1322 | ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2; |
| 1323 | wpa_hexdump(MSG_DEBUG, "TDLS: FTIE for TPK M2", |
| 1324 | (u8 *) ftie, sizeof(*ftie)); |
| 1325 | |
| 1326 | pos = (u8 *) (ftie + 1); |
| 1327 | |
| 1328 | #ifdef CONFIG_TDLS_TESTING |
| 1329 | if (tdls_testing & TDLS_TESTING_LONG_FRAME) { |
| 1330 | wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to " |
| 1331 | "FTIE"); |
| 1332 | ftie->ie_len += 170; |
| 1333 | *pos++ = 255; /* FTIE subelem */ |
| 1334 | *pos++ = 168; /* FTIE subelem length */ |
| 1335 | pos += 168; |
| 1336 | } |
| 1337 | #endif /* CONFIG_TDLS_TESTING */ |
| 1338 | |
| 1339 | /* Lifetime */ |
| 1340 | lifetime = peer->lifetime; |
| 1341 | #ifdef CONFIG_TDLS_TESTING |
| 1342 | if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_RESP) { |
| 1343 | wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK " |
| 1344 | "lifetime in response"); |
| 1345 | lifetime++; |
| 1346 | } |
| 1347 | #endif /* CONFIG_TDLS_TESTING */ |
| 1348 | pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie, |
| 1349 | sizeof(timeoutie), lifetime); |
| 1350 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds from initiator", |
| 1351 | lifetime); |
| 1352 | |
| 1353 | /* compute MIC before sending */ |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 1354 | wpa_tdls_ftie_mic(peer->tpk.kck, 2, (const u8 *) lnkid, peer->rsnie_p, |
| 1355 | peer->rsnie_p_len, (const u8 *) &timeoutie, |
| 1356 | (const u8 *) ftie, 2 + ftie->ie_len, ftie->mic); |
Dmitry Shmidt | 21de214 | 2014-04-08 10:50:52 -0700 | [diff] [blame] | 1357 | #ifdef CONFIG_TDLS_TESTING |
| 1358 | if (tdls_testing & TDLS_TESTING_WRONG_MIC) { |
| 1359 | wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong MIC"); |
| 1360 | ftie->mic[0] ^= 0x01; |
| 1361 | } |
| 1362 | #endif /* CONFIG_TDLS_TESTING */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1363 | |
| 1364 | skip_ies: |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1365 | status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 1366 | dtoken, 0, 0, peer->initiator, rbuf, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1367 | pos - rbuf, -1); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1368 | os_free(rbuf); |
| 1369 | |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1370 | return status; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | |
| 1374 | static int wpa_tdls_send_tpk_m3(struct wpa_sm *sm, |
| 1375 | const unsigned char *src_addr, u8 dtoken, |
| 1376 | struct wpa_tdls_lnkid *lnkid, |
| 1377 | const struct wpa_tdls_peer *peer) |
| 1378 | { |
| 1379 | u8 *rbuf, *pos; |
| 1380 | size_t buf_len; |
| 1381 | struct wpa_tdls_ftie *ftie; |
| 1382 | struct wpa_tdls_timeoutie timeoutie; |
| 1383 | u32 lifetime; |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1384 | int status; |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 1385 | u32 peer_capab = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1386 | |
| 1387 | buf_len = 0; |
| 1388 | if (wpa_tdls_get_privacy(sm)) { |
| 1389 | /* Peer RSN IE, FTIE(Initiator Nonce, Responder Nonce), |
| 1390 | * Lifetime */ |
| 1391 | buf_len += peer->rsnie_i_len + sizeof(struct wpa_tdls_ftie) + |
| 1392 | sizeof(struct wpa_tdls_timeoutie); |
| 1393 | #ifdef CONFIG_TDLS_TESTING |
| 1394 | if (tdls_testing & TDLS_TESTING_LONG_FRAME) |
| 1395 | buf_len += 170; |
| 1396 | #endif /* CONFIG_TDLS_TESTING */ |
| 1397 | } |
| 1398 | |
| 1399 | rbuf = os_zalloc(buf_len + 1); |
| 1400 | if (rbuf == NULL) |
| 1401 | return -1; |
| 1402 | pos = rbuf; |
| 1403 | |
| 1404 | if (!wpa_tdls_get_privacy(sm)) |
| 1405 | goto skip_ies; |
| 1406 | |
| 1407 | /* Peer RSN IE */ |
| 1408 | pos = wpa_add_ie(pos, peer->rsnie_p, peer->rsnie_p_len); |
| 1409 | |
| 1410 | ftie = (struct wpa_tdls_ftie *) pos; |
| 1411 | ftie->ie_type = WLAN_EID_FAST_BSS_TRANSITION; |
| 1412 | /*TODO: ftie->mic_control to set 3-CONFIRM */ |
| 1413 | os_memcpy(ftie->Anonce, peer->rnonce, WPA_NONCE_LEN); |
| 1414 | os_memcpy(ftie->Snonce, peer->inonce, WPA_NONCE_LEN); |
| 1415 | ftie->ie_len = sizeof(struct wpa_tdls_ftie) - 2; |
| 1416 | |
| 1417 | pos = (u8 *) (ftie + 1); |
| 1418 | |
| 1419 | #ifdef CONFIG_TDLS_TESTING |
| 1420 | if (tdls_testing & TDLS_TESTING_LONG_FRAME) { |
| 1421 | wpa_printf(MSG_DEBUG, "TDLS: Testing - add extra subelem to " |
| 1422 | "FTIE"); |
| 1423 | ftie->ie_len += 170; |
| 1424 | *pos++ = 255; /* FTIE subelem */ |
| 1425 | *pos++ = 168; /* FTIE subelem length */ |
| 1426 | pos += 168; |
| 1427 | } |
| 1428 | #endif /* CONFIG_TDLS_TESTING */ |
| 1429 | |
| 1430 | /* Lifetime */ |
| 1431 | lifetime = peer->lifetime; |
| 1432 | #ifdef CONFIG_TDLS_TESTING |
| 1433 | if (tdls_testing & TDLS_TESTING_WRONG_LIFETIME_CONF) { |
| 1434 | wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong TPK " |
| 1435 | "lifetime in confirm"); |
| 1436 | lifetime++; |
| 1437 | } |
| 1438 | #endif /* CONFIG_TDLS_TESTING */ |
| 1439 | pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie, |
| 1440 | sizeof(timeoutie), lifetime); |
| 1441 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", |
| 1442 | lifetime); |
| 1443 | |
| 1444 | /* compute MIC before sending */ |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 1445 | wpa_tdls_ftie_mic(peer->tpk.kck, 3, (const u8 *) lnkid, peer->rsnie_p, |
| 1446 | peer->rsnie_p_len, (const u8 *) &timeoutie, |
| 1447 | (const u8 *) ftie, 2 + ftie->ie_len, ftie->mic); |
Dmitry Shmidt | 21de214 | 2014-04-08 10:50:52 -0700 | [diff] [blame] | 1448 | #ifdef CONFIG_TDLS_TESTING |
| 1449 | if (tdls_testing & TDLS_TESTING_WRONG_MIC) { |
| 1450 | wpa_printf(MSG_DEBUG, "TDLS: Testing - use wrong MIC"); |
| 1451 | ftie->mic[0] ^= 0x01; |
| 1452 | } |
| 1453 | #endif /* CONFIG_TDLS_TESTING */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1454 | |
Dmitry Shmidt | b58836e | 2014-04-29 14:35:56 -0700 | [diff] [blame] | 1455 | skip_ies: |
| 1456 | |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 1457 | if (peer->he_capabilities) |
| 1458 | peer_capab |= TDLS_PEER_HE; |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 1459 | if (peer->vht_capabilities) |
| 1460 | peer_capab |= TDLS_PEER_VHT; |
Dmitry Shmidt | b58836e | 2014-04-29 14:35:56 -0700 | [diff] [blame] | 1461 | if (peer->ht_capabilities) |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 1462 | peer_capab |= TDLS_PEER_HT; |
Dmitry Shmidt | b58836e | 2014-04-29 14:35:56 -0700 | [diff] [blame] | 1463 | if (peer->wmm_capable) |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 1464 | peer_capab |= TDLS_PEER_WMM; |
| 1465 | |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1466 | status = wpa_tdls_tpk_send(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 1467 | dtoken, 0, peer_capab, peer->initiator, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1468 | rbuf, pos - rbuf, -1); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1469 | os_free(rbuf); |
| 1470 | |
Dmitry Shmidt | d5c075b | 2013-08-05 14:36:10 -0700 | [diff] [blame] | 1471 | return status; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1472 | } |
| 1473 | |
| 1474 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1475 | static int wpa_tdls_send_discovery_response(struct wpa_sm *sm, |
| 1476 | struct wpa_tdls_peer *peer, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1477 | u8 dialog_token, int link_id) |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1478 | { |
Dmitry Shmidt | 661b4f7 | 2014-09-29 14:58:27 -0700 | [diff] [blame] | 1479 | size_t buf_len = 0; |
| 1480 | struct wpa_tdls_timeoutie timeoutie; |
| 1481 | u16 rsn_capab; |
| 1482 | u8 *rbuf, *pos, *count_pos; |
| 1483 | u16 count; |
| 1484 | struct rsn_ie_hdr *hdr; |
| 1485 | int status; |
| 1486 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1487 | wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Discovery Response " |
| 1488 | "(peer " MACSTR ")", MAC2STR(peer->addr)); |
Dmitry Shmidt | 661b4f7 | 2014-09-29 14:58:27 -0700 | [diff] [blame] | 1489 | if (!wpa_tdls_get_privacy(sm)) |
| 1490 | goto skip_rsn_ies; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1491 | |
Dmitry Shmidt | 661b4f7 | 2014-09-29 14:58:27 -0700 | [diff] [blame] | 1492 | /* Filling RSN IE */ |
| 1493 | hdr = (struct rsn_ie_hdr *) peer->rsnie_i; |
| 1494 | hdr->elem_id = WLAN_EID_RSN; |
| 1495 | WPA_PUT_LE16(hdr->version, RSN_VERSION); |
| 1496 | pos = (u8 *) (hdr + 1); |
| 1497 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); |
| 1498 | pos += RSN_SELECTOR_LEN; |
| 1499 | count_pos = pos; |
| 1500 | pos += 2; |
| 1501 | count = 0; |
| 1502 | |
| 1503 | /* |
| 1504 | * AES-CCMP is the default encryption preferred for TDLS, so |
| 1505 | * RSN IE is filled only with CCMP cipher suite. |
| 1506 | * Note: TKIP is not used to encrypt TDLS link. |
| 1507 | * |
| 1508 | * Regardless of the cipher used on the AP connection, select CCMP |
| 1509 | * here. |
| 1510 | */ |
| 1511 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); |
| 1512 | pos += RSN_SELECTOR_LEN; |
| 1513 | count++; |
| 1514 | WPA_PUT_LE16(count_pos, count); |
| 1515 | WPA_PUT_LE16(pos, 1); |
| 1516 | pos += 2; |
| 1517 | RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE); |
| 1518 | pos += RSN_SELECTOR_LEN; |
| 1519 | |
| 1520 | rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED; |
| 1521 | rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2; |
| 1522 | WPA_PUT_LE16(pos, rsn_capab); |
| 1523 | pos += 2; |
| 1524 | hdr->len = (pos - (u8 *) hdr) - 2; |
| 1525 | peer->rsnie_i_len = pos - peer->rsnie_i; |
| 1526 | |
| 1527 | wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for Discovery Response", |
| 1528 | (u8 *) hdr, hdr->len + 2); |
| 1529 | skip_rsn_ies: |
| 1530 | buf_len = 0; |
| 1531 | if (wpa_tdls_get_privacy(sm)) { |
| 1532 | /* Peer RSN IE, Lifetime */ |
| 1533 | buf_len += peer->rsnie_i_len + |
| 1534 | sizeof(struct wpa_tdls_timeoutie); |
| 1535 | } |
| 1536 | rbuf = os_zalloc(buf_len + 1); |
| 1537 | if (rbuf == NULL) { |
| 1538 | wpa_tdls_peer_free(sm, peer); |
| 1539 | return -1; |
| 1540 | } |
| 1541 | pos = rbuf; |
| 1542 | |
| 1543 | if (!wpa_tdls_get_privacy(sm)) |
| 1544 | goto skip_ies; |
| 1545 | /* Initiator RSN IE */ |
| 1546 | pos = wpa_add_ie(pos, peer->rsnie_i, peer->rsnie_i_len); |
| 1547 | /* Lifetime */ |
| 1548 | peer->lifetime = TPK_LIFETIME; |
| 1549 | pos = wpa_add_tdls_timeoutie(pos, (u8 *) &timeoutie, |
| 1550 | sizeof(timeoutie), peer->lifetime); |
| 1551 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", peer->lifetime); |
| 1552 | skip_ies: |
| 1553 | status = wpa_tdls_tpk_send(sm, peer->addr, WLAN_TDLS_DISCOVERY_RESPONSE, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1554 | dialog_token, 0, 0, 0, rbuf, pos - rbuf, |
| 1555 | link_id); |
Dmitry Shmidt | 661b4f7 | 2014-09-29 14:58:27 -0700 | [diff] [blame] | 1556 | os_free(rbuf); |
| 1557 | |
| 1558 | return status; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1559 | } |
| 1560 | |
| 1561 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1562 | static bool wpa_tdls_is_lnkid_bss_valid(struct wpa_sm *sm, |
| 1563 | const struct wpa_tdls_lnkid *lnkid, |
| 1564 | int *link_id) |
| 1565 | { |
| 1566 | *link_id = -1; |
| 1567 | |
| 1568 | if (!sm->mlo.valid_links) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 1569 | if (!ether_addr_equal(sm->bssid, lnkid->bssid)) |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1570 | return false; |
| 1571 | } else { |
| 1572 | int i; |
| 1573 | |
Sunil Ravi | 99c035e | 2024-07-12 01:42:03 +0000 | [diff] [blame^] | 1574 | for_each_link(sm->mlo.valid_links, i) { |
| 1575 | if (ether_addr_equal(lnkid->bssid, |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 1576 | sm->mlo.links[i].bssid)) { |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1577 | *link_id = i; |
| 1578 | break; |
| 1579 | } |
| 1580 | } |
| 1581 | if (*link_id < 0) { |
| 1582 | wpa_printf(MSG_DEBUG, |
| 1583 | "TDLS: MLD link not found for linkid BSS " |
| 1584 | MACSTR, MAC2STR(lnkid->bssid)); |
| 1585 | return false; |
| 1586 | } |
| 1587 | } |
| 1588 | |
| 1589 | return true; |
| 1590 | } |
| 1591 | |
| 1592 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1593 | static int |
| 1594 | wpa_tdls_process_discovery_request(struct wpa_sm *sm, const u8 *addr, |
| 1595 | const u8 *buf, size_t len) |
| 1596 | { |
| 1597 | struct wpa_eapol_ie_parse kde; |
| 1598 | const struct wpa_tdls_lnkid *lnkid; |
| 1599 | struct wpa_tdls_peer *peer; |
| 1600 | size_t min_req_len = sizeof(struct wpa_tdls_frame) + |
| 1601 | 1 /* dialog token */ + sizeof(struct wpa_tdls_lnkid); |
| 1602 | u8 dialog_token; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1603 | int link_id = -1; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1604 | |
| 1605 | wpa_printf(MSG_DEBUG, "TDLS: Discovery Request from " MACSTR, |
| 1606 | MAC2STR(addr)); |
| 1607 | |
| 1608 | if (len < min_req_len) { |
| 1609 | wpa_printf(MSG_DEBUG, "TDLS Discovery Request is too short: " |
| 1610 | "%d", (int) len); |
| 1611 | return -1; |
| 1612 | } |
| 1613 | |
| 1614 | dialog_token = buf[sizeof(struct wpa_tdls_frame)]; |
| 1615 | |
Dmitry Shmidt | 0c08fdc | 2014-06-20 10:16:40 -0700 | [diff] [blame] | 1616 | /* |
| 1617 | * Some APs will tack on a weird IE to the end of a TDLS |
| 1618 | * discovery request packet. This needn't fail the response, |
| 1619 | * since the required IE are verified separately. |
| 1620 | */ |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1621 | if (wpa_supplicant_parse_ies(buf + sizeof(struct wpa_tdls_frame) + 1, |
| 1622 | len - (sizeof(struct wpa_tdls_frame) + 1), |
Dmitry Shmidt | 0c08fdc | 2014-06-20 10:16:40 -0700 | [diff] [blame] | 1623 | &kde) < 0) { |
| 1624 | wpa_printf(MSG_DEBUG, |
| 1625 | "TDLS: Failed to parse IEs in Discovery Request - ignore as an interop workaround"); |
| 1626 | } |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1627 | |
| 1628 | if (!kde.lnkid) { |
| 1629 | wpa_printf(MSG_DEBUG, "TDLS: Link ID not found in Discovery " |
| 1630 | "Request"); |
| 1631 | return -1; |
| 1632 | } |
| 1633 | |
| 1634 | lnkid = (const struct wpa_tdls_lnkid *) kde.lnkid; |
| 1635 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1636 | if (!wpa_tdls_is_lnkid_bss_valid(sm, lnkid, &link_id)) { |
| 1637 | wpa_printf(MSG_DEBUG, |
| 1638 | "TDLS: Discovery Request from different BSS " |
| 1639 | MACSTR, MAC2STR(lnkid->bssid)); |
| 1640 | return -1; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1641 | } |
| 1642 | |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 1643 | peer = wpa_tdls_add_peer(sm, addr, NULL); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1644 | if (peer == NULL) |
| 1645 | return -1; |
| 1646 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1647 | return wpa_tdls_send_discovery_response(sm, peer, dialog_token, |
| 1648 | link_id); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1649 | } |
| 1650 | |
| 1651 | |
| 1652 | int wpa_tdls_send_discovery_request(struct wpa_sm *sm, const u8 *addr) |
| 1653 | { |
| 1654 | if (sm->tdls_disabled || !sm->tdls_supported) |
| 1655 | return -1; |
| 1656 | |
| 1657 | wpa_printf(MSG_DEBUG, "TDLS: Sending Discovery Request to peer " |
| 1658 | MACSTR, MAC2STR(addr)); |
| 1659 | return wpa_tdls_tpk_send(sm, addr, WLAN_TDLS_DISCOVERY_REQUEST, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1660 | 1, 0, 0, 1, NULL, 0, -1); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1661 | } |
| 1662 | |
| 1663 | |
| 1664 | static int copy_supp_rates(const struct wpa_eapol_ie_parse *kde, |
| 1665 | struct wpa_tdls_peer *peer) |
| 1666 | { |
| 1667 | if (!kde->supp_rates) { |
| 1668 | wpa_printf(MSG_DEBUG, "TDLS: No supported rates received"); |
| 1669 | return -1; |
| 1670 | } |
Dmitry Shmidt | a54fa5f | 2013-01-15 13:53:35 -0800 | [diff] [blame] | 1671 | peer->supp_rates_len = merge_byte_arrays( |
| 1672 | peer->supp_rates, sizeof(peer->supp_rates), |
| 1673 | kde->supp_rates + 2, kde->supp_rates_len - 2, |
Dmitry Shmidt | 34af306 | 2013-07-11 10:46:32 -0700 | [diff] [blame] | 1674 | kde->ext_supp_rates ? kde->ext_supp_rates + 2 : NULL, |
Hai Shalom | 021b0b5 | 2019-04-10 11:17:58 -0700 | [diff] [blame] | 1675 | kde->ext_supp_rates ? kde->ext_supp_rates_len - 2 : 0); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1676 | return 0; |
| 1677 | } |
| 1678 | |
| 1679 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 1680 | static int copy_peer_ht_capab(const struct wpa_eapol_ie_parse *kde, |
| 1681 | struct wpa_tdls_peer *peer) |
| 1682 | { |
Dmitry Shmidt | 9d9e602 | 2015-04-23 10:34:55 -0700 | [diff] [blame] | 1683 | if (!kde->ht_capabilities) { |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 1684 | wpa_printf(MSG_DEBUG, "TDLS: No supported ht capabilities " |
| 1685 | "received"); |
| 1686 | return 0; |
| 1687 | } |
| 1688 | |
| 1689 | if (!peer->ht_capabilities) { |
| 1690 | peer->ht_capabilities = |
| 1691 | os_zalloc(sizeof(struct ieee80211_ht_capabilities)); |
| 1692 | if (peer->ht_capabilities == NULL) |
| 1693 | return -1; |
| 1694 | } |
| 1695 | |
| 1696 | os_memcpy(peer->ht_capabilities, kde->ht_capabilities, |
| 1697 | sizeof(struct ieee80211_ht_capabilities)); |
| 1698 | wpa_hexdump(MSG_DEBUG, "TDLS: Peer HT capabilities", |
| 1699 | (u8 *) peer->ht_capabilities, |
| 1700 | sizeof(struct ieee80211_ht_capabilities)); |
| 1701 | |
| 1702 | return 0; |
| 1703 | } |
| 1704 | |
| 1705 | |
Dmitry Shmidt | 33e38bf | 2013-02-27 12:56:00 -0800 | [diff] [blame] | 1706 | static int copy_peer_vht_capab(const struct wpa_eapol_ie_parse *kde, |
| 1707 | struct wpa_tdls_peer *peer) |
| 1708 | { |
Dmitry Shmidt | 9d9e602 | 2015-04-23 10:34:55 -0700 | [diff] [blame] | 1709 | if (!kde->vht_capabilities) { |
Dmitry Shmidt | 33e38bf | 2013-02-27 12:56:00 -0800 | [diff] [blame] | 1710 | wpa_printf(MSG_DEBUG, "TDLS: No supported vht capabilities " |
| 1711 | "received"); |
| 1712 | return 0; |
| 1713 | } |
| 1714 | |
| 1715 | if (!peer->vht_capabilities) { |
| 1716 | peer->vht_capabilities = |
| 1717 | os_zalloc(sizeof(struct ieee80211_vht_capabilities)); |
| 1718 | if (peer->vht_capabilities == NULL) |
| 1719 | return -1; |
| 1720 | } |
| 1721 | |
| 1722 | os_memcpy(peer->vht_capabilities, kde->vht_capabilities, |
| 1723 | sizeof(struct ieee80211_vht_capabilities)); |
| 1724 | wpa_hexdump(MSG_DEBUG, "TDLS: Peer VHT capabilities", |
| 1725 | (u8 *) peer->vht_capabilities, |
| 1726 | sizeof(struct ieee80211_vht_capabilities)); |
| 1727 | |
| 1728 | return 0; |
| 1729 | } |
| 1730 | |
| 1731 | |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 1732 | static int copy_peer_he_capab(const struct wpa_eapol_ie_parse *kde, |
| 1733 | struct wpa_tdls_peer *peer) |
| 1734 | { |
| 1735 | if (!kde->he_capabilities) { |
| 1736 | wpa_printf(MSG_DEBUG, "TDLS: No HE capabilities received"); |
| 1737 | return 0; |
| 1738 | } |
| 1739 | |
| 1740 | os_free(peer->he_capabilities); |
| 1741 | peer->he_capab_len = 0; |
| 1742 | peer->he_capabilities = os_memdup(kde->he_capabilities, |
| 1743 | kde->he_capab_len); |
| 1744 | if (!peer->he_capabilities) |
| 1745 | return -1; |
| 1746 | |
| 1747 | peer->he_capab_len = kde->he_capab_len; |
| 1748 | wpa_hexdump(MSG_DEBUG, "TDLS: Peer HE capabilities", |
| 1749 | peer->he_capabilities, peer->he_capab_len); |
| 1750 | |
| 1751 | return 0; |
| 1752 | } |
| 1753 | |
| 1754 | |
| 1755 | static int copy_peer_he_6ghz_band_capab(const struct wpa_eapol_ie_parse *kde, |
| 1756 | struct wpa_tdls_peer *peer) |
| 1757 | { |
| 1758 | if (!kde->he_6ghz_capabilities) { |
| 1759 | wpa_printf(MSG_DEBUG, |
| 1760 | "TDLS: No HE 6 GHz band capabilities received"); |
| 1761 | return 0; |
| 1762 | } |
| 1763 | |
| 1764 | if (!peer->he_6ghz_band_capabilities) { |
| 1765 | peer->he_6ghz_band_capabilities = |
| 1766 | os_zalloc(sizeof(struct ieee80211_he_6ghz_band_cap)); |
| 1767 | if (peer->he_6ghz_band_capabilities == NULL) |
| 1768 | return -1; |
| 1769 | } |
| 1770 | |
| 1771 | os_memcpy(peer->he_6ghz_band_capabilities, kde->he_6ghz_capabilities, |
| 1772 | sizeof(struct ieee80211_he_6ghz_band_cap)); |
| 1773 | |
| 1774 | wpa_hexdump(MSG_DEBUG, "TDLS: Peer 6 GHz band HE capabilities", |
| 1775 | peer->he_6ghz_band_capabilities, |
| 1776 | sizeof(struct ieee80211_he_6ghz_band_cap)); |
| 1777 | |
| 1778 | return 0; |
| 1779 | } |
| 1780 | |
| 1781 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 1782 | static int copy_peer_ext_capab(const struct wpa_eapol_ie_parse *kde, |
| 1783 | struct wpa_tdls_peer *peer) |
| 1784 | { |
| 1785 | if (!kde->ext_capab) { |
| 1786 | wpa_printf(MSG_DEBUG, "TDLS: No extended capabilities " |
| 1787 | "received"); |
| 1788 | return 0; |
| 1789 | } |
| 1790 | |
| 1791 | if (!peer->ext_capab || peer->ext_capab_len < kde->ext_capab_len - 2) { |
| 1792 | /* Need to allocate buffer to fit the new information */ |
| 1793 | os_free(peer->ext_capab); |
| 1794 | peer->ext_capab = os_zalloc(kde->ext_capab_len - 2); |
| 1795 | if (peer->ext_capab == NULL) |
| 1796 | return -1; |
| 1797 | } |
| 1798 | |
| 1799 | peer->ext_capab_len = kde->ext_capab_len - 2; |
| 1800 | os_memcpy(peer->ext_capab, kde->ext_capab + 2, peer->ext_capab_len); |
| 1801 | |
| 1802 | return 0; |
| 1803 | } |
| 1804 | |
| 1805 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1806 | static int copy_peer_eht_capab(const struct wpa_eapol_ie_parse *kde, |
| 1807 | struct wpa_tdls_peer *peer) |
| 1808 | { |
| 1809 | if (!kde->eht_capabilities) { |
| 1810 | wpa_printf(MSG_DEBUG, "TDLS: No EHT capabilities received"); |
| 1811 | return 0; |
| 1812 | } |
| 1813 | |
| 1814 | os_free(peer->eht_capabilities); |
| 1815 | peer->eht_capab_len = 0; |
| 1816 | peer->eht_capabilities = os_memdup(kde->eht_capabilities, |
| 1817 | kde->eht_capab_len); |
| 1818 | if (!peer->eht_capabilities) |
| 1819 | return -1; |
| 1820 | |
| 1821 | peer->eht_capab_len = kde->eht_capab_len; |
| 1822 | wpa_hexdump(MSG_DEBUG, "TDLS: Peer EHT capabilities", |
| 1823 | peer->eht_capabilities, peer->eht_capab_len); |
| 1824 | |
| 1825 | return 0; |
| 1826 | } |
| 1827 | |
| 1828 | |
Dmitry Shmidt | b36ed7c | 2014-03-17 10:57:26 -0700 | [diff] [blame] | 1829 | static int copy_peer_wmm_capab(const struct wpa_eapol_ie_parse *kde, |
| 1830 | struct wpa_tdls_peer *peer) |
| 1831 | { |
| 1832 | struct wmm_information_element *wmm; |
| 1833 | |
| 1834 | if (!kde->wmm) { |
| 1835 | wpa_printf(MSG_DEBUG, "TDLS: No supported WMM capabilities received"); |
| 1836 | return 0; |
| 1837 | } |
| 1838 | |
| 1839 | if (kde->wmm_len < sizeof(struct wmm_information_element)) { |
| 1840 | wpa_printf(MSG_DEBUG, "TDLS: Invalid supported WMM capabilities received"); |
| 1841 | return -1; |
| 1842 | } |
| 1843 | |
| 1844 | wmm = (struct wmm_information_element *) kde->wmm; |
| 1845 | peer->qos_info = wmm->qos_info; |
| 1846 | |
Dmitry Shmidt | df5a7e4 | 2014-04-02 12:59:59 -0700 | [diff] [blame] | 1847 | peer->wmm_capable = 1; |
| 1848 | |
Dmitry Shmidt | b36ed7c | 2014-03-17 10:57:26 -0700 | [diff] [blame] | 1849 | wpa_printf(MSG_DEBUG, "TDLS: Peer WMM QOS Info 0x%x", peer->qos_info); |
| 1850 | return 0; |
| 1851 | } |
| 1852 | |
| 1853 | |
Dmitry Shmidt | 344abd3 | 2014-01-14 13:17:00 -0800 | [diff] [blame] | 1854 | static int copy_peer_supp_channels(const struct wpa_eapol_ie_parse *kde, |
| 1855 | struct wpa_tdls_peer *peer) |
| 1856 | { |
| 1857 | if (!kde->supp_channels) { |
| 1858 | wpa_printf(MSG_DEBUG, "TDLS: No supported channels received"); |
| 1859 | return 0; |
| 1860 | } |
| 1861 | |
| 1862 | if (!peer->supp_channels || |
| 1863 | peer->supp_channels_len < kde->supp_channels_len) { |
| 1864 | os_free(peer->supp_channels); |
| 1865 | peer->supp_channels = os_zalloc(kde->supp_channels_len); |
| 1866 | if (peer->supp_channels == NULL) |
| 1867 | return -1; |
| 1868 | } |
| 1869 | |
| 1870 | peer->supp_channels_len = kde->supp_channels_len; |
| 1871 | |
| 1872 | os_memcpy(peer->supp_channels, kde->supp_channels, |
| 1873 | peer->supp_channels_len); |
| 1874 | wpa_hexdump(MSG_DEBUG, "TDLS: Peer Supported Channels", |
| 1875 | (u8 *) peer->supp_channels, peer->supp_channels_len); |
| 1876 | return 0; |
| 1877 | } |
| 1878 | |
| 1879 | |
| 1880 | static int copy_peer_supp_oper_classes(const struct wpa_eapol_ie_parse *kde, |
| 1881 | struct wpa_tdls_peer *peer) |
| 1882 | { |
| 1883 | if (!kde->supp_oper_classes) { |
| 1884 | wpa_printf(MSG_DEBUG, "TDLS: No supported operating classes received"); |
| 1885 | return 0; |
| 1886 | } |
| 1887 | |
| 1888 | if (!peer->supp_oper_classes || |
| 1889 | peer->supp_oper_classes_len < kde->supp_oper_classes_len) { |
| 1890 | os_free(peer->supp_oper_classes); |
| 1891 | peer->supp_oper_classes = os_zalloc(kde->supp_oper_classes_len); |
| 1892 | if (peer->supp_oper_classes == NULL) |
| 1893 | return -1; |
| 1894 | } |
| 1895 | |
| 1896 | peer->supp_oper_classes_len = kde->supp_oper_classes_len; |
| 1897 | os_memcpy(peer->supp_oper_classes, kde->supp_oper_classes, |
| 1898 | peer->supp_oper_classes_len); |
| 1899 | wpa_hexdump(MSG_DEBUG, "TDLS: Peer Supported Operating Classes", |
| 1900 | (u8 *) peer->supp_oper_classes, |
| 1901 | peer->supp_oper_classes_len); |
| 1902 | return 0; |
| 1903 | } |
| 1904 | |
| 1905 | |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 1906 | static int wpa_tdls_addset_peer(struct wpa_sm *sm, struct wpa_tdls_peer *peer, |
| 1907 | int add) |
| 1908 | { |
| 1909 | return wpa_sm_tdls_peer_addset(sm, peer->addr, add, peer->aid, |
| 1910 | peer->capability, |
| 1911 | peer->supp_rates, peer->supp_rates_len, |
| 1912 | peer->ht_capabilities, |
| 1913 | peer->vht_capabilities, |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 1914 | peer->he_capabilities, |
| 1915 | peer->he_capab_len, |
| 1916 | peer->he_6ghz_band_capabilities, |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 1917 | peer->qos_info, peer->wmm_capable, |
| 1918 | peer->ext_capab, peer->ext_capab_len, |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 1919 | peer->supp_channels, |
| 1920 | peer->supp_channels_len, |
| 1921 | peer->supp_oper_classes, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1922 | peer->supp_oper_classes_len, |
| 1923 | peer->eht_capabilities, |
| 1924 | peer->eht_capab_len, |
| 1925 | peer->mld_link_id); |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 1926 | } |
| 1927 | |
| 1928 | |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 1929 | static int tdls_nonce_set(const u8 *nonce) |
| 1930 | { |
| 1931 | int i; |
| 1932 | |
| 1933 | for (i = 0; i < WPA_NONCE_LEN; i++) { |
| 1934 | if (nonce[i]) |
| 1935 | return 1; |
| 1936 | } |
| 1937 | |
| 1938 | return 0; |
| 1939 | } |
| 1940 | |
| 1941 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1942 | static int wpa_tdls_process_tpk_m1(struct wpa_sm *sm, const u8 *src_addr, |
| 1943 | const u8 *buf, size_t len) |
| 1944 | { |
| 1945 | struct wpa_tdls_peer *peer; |
| 1946 | struct wpa_eapol_ie_parse kde; |
| 1947 | struct wpa_ie_data ie; |
| 1948 | int cipher; |
| 1949 | const u8 *cpos; |
| 1950 | struct wpa_tdls_ftie *ftie = NULL; |
| 1951 | struct wpa_tdls_timeoutie *timeoutie; |
| 1952 | struct wpa_tdls_lnkid *lnkid; |
| 1953 | u32 lifetime = 0; |
| 1954 | #if 0 |
| 1955 | struct rsn_ie_hdr *hdr; |
| 1956 | u8 *pos; |
| 1957 | u16 rsn_capab; |
| 1958 | u16 rsn_ver; |
| 1959 | #endif |
| 1960 | u8 dtoken; |
| 1961 | u16 ielen; |
| 1962 | u16 status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 1963 | int tdls_prohibited = sm->tdls_prohibited; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1964 | int existing_peer = 0; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 1965 | int link_id = -1; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 1966 | |
| 1967 | if (len < 3 + 3) |
| 1968 | return -1; |
| 1969 | |
| 1970 | cpos = buf; |
| 1971 | cpos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */; |
| 1972 | |
| 1973 | /* driver had already verified the frame format */ |
| 1974 | dtoken = *cpos++; /* dialog token */ |
| 1975 | |
| 1976 | wpa_printf(MSG_INFO, "TDLS: Dialog Token in TPK M1 %d", dtoken); |
| 1977 | |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 1978 | peer = wpa_tdls_add_peer(sm, src_addr, &existing_peer); |
| 1979 | if (peer == NULL) |
| 1980 | goto error; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 1981 | |
Dmitry Shmidt | 0ccb66e | 2013-03-29 16:41:28 -0700 | [diff] [blame] | 1982 | /* If found, use existing entry instead of adding a new one; |
| 1983 | * how to handle the case where both ends initiate at the |
| 1984 | * same time? */ |
| 1985 | if (existing_peer) { |
| 1986 | if (peer->tpk_success) { |
| 1987 | wpa_printf(MSG_DEBUG, "TDLS: TDLS Setup Request while " |
| 1988 | "direct link is enabled - tear down the " |
| 1989 | "old link first"); |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 1990 | wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr); |
| 1991 | wpa_tdls_peer_clear(sm, peer); |
| 1992 | } else if (peer->initiator) { |
| 1993 | /* |
| 1994 | * An entry is already present, so check if we already |
| 1995 | * sent a TDLS Setup Request. If so, compare MAC |
| 1996 | * addresses and let the STA with the lower MAC address |
| 1997 | * continue as the initiator. The other negotiation is |
| 1998 | * terminated. |
| 1999 | */ |
Dmitry Shmidt | 0ccb66e | 2013-03-29 16:41:28 -0700 | [diff] [blame] | 2000 | if (os_memcmp(sm->own_addr, src_addr, ETH_ALEN) < 0) { |
| 2001 | wpa_printf(MSG_DEBUG, "TDLS: Discard request " |
| 2002 | "from peer with higher address " |
| 2003 | MACSTR, MAC2STR(src_addr)); |
| 2004 | return -1; |
| 2005 | } else { |
| 2006 | wpa_printf(MSG_DEBUG, "TDLS: Accept request " |
| 2007 | "from peer with lower address " |
| 2008 | MACSTR " (terminate previously " |
| 2009 | "initiated negotiation", |
| 2010 | MAC2STR(src_addr)); |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2011 | wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, |
| 2012 | peer->addr); |
| 2013 | wpa_tdls_peer_clear(sm, peer); |
Dmitry Shmidt | 0ccb66e | 2013-03-29 16:41:28 -0700 | [diff] [blame] | 2014 | } |
| 2015 | } |
| 2016 | } |
| 2017 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2018 | /* capability information */ |
| 2019 | peer->capability = WPA_GET_LE16(cpos); |
| 2020 | cpos += 2; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2021 | |
| 2022 | ielen = len - (cpos - buf); /* start of IE in buf */ |
Dmitry Shmidt | 7f65602 | 2015-02-25 14:36:37 -0800 | [diff] [blame] | 2023 | |
| 2024 | /* |
| 2025 | * Don't reject the message if failing to parse IEs. The IEs we need are |
| 2026 | * explicitly checked below. Some APs may add arbitrary padding to the |
| 2027 | * end of short TDLS frames and that would look like invalid IEs. |
| 2028 | */ |
| 2029 | if (wpa_supplicant_parse_ies(cpos, ielen, &kde) < 0) |
| 2030 | wpa_printf(MSG_DEBUG, |
| 2031 | "TDLS: Failed to parse IEs in TPK M1 - ignore as an interop workaround"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2032 | |
| 2033 | if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) { |
| 2034 | wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in " |
| 2035 | "TPK M1"); |
| 2036 | goto error; |
| 2037 | } |
| 2038 | wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M1", |
| 2039 | kde.lnkid, kde.lnkid_len); |
| 2040 | lnkid = (struct wpa_tdls_lnkid *) kde.lnkid; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2041 | |
| 2042 | if (!wpa_tdls_is_lnkid_bss_valid(sm, lnkid, &link_id)) { |
| 2043 | wpa_printf(MSG_INFO, "TDLS: TPK M1 from diff BSS " |
| 2044 | MACSTR, MAC2STR(lnkid->bssid)); |
Dmitry Shmidt | 661b4f7 | 2014-09-29 14:58:27 -0700 | [diff] [blame] | 2045 | status = WLAN_STATUS_REQUEST_DECLINED; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2046 | goto error; |
| 2047 | } |
| 2048 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2049 | peer->mld_link_id = link_id; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2050 | wpa_printf(MSG_DEBUG, "TDLS: TPK M1 - TPK initiator " MACSTR, |
| 2051 | MAC2STR(src_addr)); |
| 2052 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2053 | if (copy_supp_rates(&kde, peer) < 0) |
| 2054 | goto error; |
| 2055 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 2056 | if (copy_peer_ht_capab(&kde, peer) < 0) |
| 2057 | goto error; |
| 2058 | |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 2059 | if (copy_peer_vht_capab(&kde, peer) < 0 || |
| 2060 | copy_peer_he_capab(&kde, peer) < 0 || |
| 2061 | copy_peer_he_6ghz_band_capab(&kde, peer) < 0) |
Dmitry Shmidt | 33e38bf | 2013-02-27 12:56:00 -0800 | [diff] [blame] | 2062 | goto error; |
| 2063 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2064 | if (copy_peer_eht_capab(&kde, peer) < 0) |
| 2065 | goto error; |
| 2066 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 2067 | if (copy_peer_ext_capab(&kde, peer) < 0) |
| 2068 | goto error; |
| 2069 | |
Dmitry Shmidt | 344abd3 | 2014-01-14 13:17:00 -0800 | [diff] [blame] | 2070 | if (copy_peer_supp_channels(&kde, peer) < 0) |
| 2071 | goto error; |
| 2072 | |
| 2073 | if (copy_peer_supp_oper_classes(&kde, peer) < 0) |
| 2074 | goto error; |
| 2075 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 2076 | peer->qos_info = kde.qosinfo; |
| 2077 | |
Dmitry Shmidt | b36ed7c | 2014-03-17 10:57:26 -0700 | [diff] [blame] | 2078 | /* Overwrite with the qos_info obtained in WMM IE */ |
| 2079 | if (copy_peer_wmm_capab(&kde, peer) < 0) |
| 2080 | goto error; |
| 2081 | |
Dmitry Shmidt | 51b6ea8 | 2013-05-08 10:42:09 -0700 | [diff] [blame] | 2082 | peer->aid = kde.aid; |
| 2083 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2084 | #ifdef CONFIG_TDLS_TESTING |
| 2085 | if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) { |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 2086 | peer = wpa_tdls_add_peer(sm, src_addr, NULL); |
| 2087 | if (peer == NULL) |
| 2088 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2089 | wpa_printf(MSG_DEBUG, "TDLS: Testing concurrent initiation of " |
| 2090 | "TDLS setup - send own request"); |
| 2091 | peer->initiator = 1; |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 2092 | wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, 0, NULL, 0, NULL, |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 2093 | NULL, NULL, 0, NULL, 0, 0, NULL, 0, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2094 | NULL, 0, NULL, 0, NULL, 0, link_id); |
Hai Shalom | 6084025 | 2021-02-19 19:02:11 -0800 | [diff] [blame] | 2095 | if (wpa_tdls_send_tpk_m1(sm, peer) == -2) { |
| 2096 | peer = NULL; |
| 2097 | goto error; |
| 2098 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2099 | } |
| 2100 | |
| 2101 | if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) && |
| 2102 | tdls_prohibited) { |
| 2103 | wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition " |
| 2104 | "on TDLS"); |
| 2105 | tdls_prohibited = 0; |
| 2106 | } |
| 2107 | #endif /* CONFIG_TDLS_TESTING */ |
| 2108 | |
| 2109 | if (tdls_prohibited) { |
| 2110 | wpa_printf(MSG_INFO, "TDLS: TDLS prohibited in this BSS"); |
| 2111 | status = WLAN_STATUS_REQUEST_DECLINED; |
| 2112 | goto error; |
| 2113 | } |
| 2114 | |
| 2115 | if (!wpa_tdls_get_privacy(sm)) { |
| 2116 | if (kde.rsn_ie) { |
| 2117 | wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M1 while " |
| 2118 | "security is disabled"); |
| 2119 | status = WLAN_STATUS_SECURITY_DISABLED; |
| 2120 | goto error; |
| 2121 | } |
| 2122 | goto skip_rsn; |
| 2123 | } |
| 2124 | |
| 2125 | if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) || |
| 2126 | kde.rsn_ie == NULL) { |
| 2127 | wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M1"); |
| 2128 | status = WLAN_STATUS_INVALID_PARAMETERS; |
| 2129 | goto error; |
| 2130 | } |
| 2131 | |
| 2132 | if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) { |
| 2133 | wpa_printf(MSG_INFO, "TDLS: Too long Initiator RSN IE in " |
| 2134 | "TPK M1"); |
| 2135 | status = WLAN_STATUS_INVALID_RSNIE; |
| 2136 | goto error; |
| 2137 | } |
| 2138 | |
| 2139 | if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) { |
| 2140 | wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M1"); |
| 2141 | status = WLAN_STATUS_INVALID_RSNIE; |
| 2142 | goto error; |
| 2143 | } |
| 2144 | |
| 2145 | cipher = ie.pairwise_cipher; |
| 2146 | if (cipher & WPA_CIPHER_CCMP) { |
| 2147 | wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link"); |
| 2148 | cipher = WPA_CIPHER_CCMP; |
| 2149 | } else { |
| 2150 | wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M1"); |
| 2151 | status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; |
| 2152 | goto error; |
| 2153 | } |
| 2154 | |
| 2155 | if ((ie.capabilities & |
| 2156 | (WPA_CAPABILITY_NO_PAIRWISE | WPA_CAPABILITY_PEERKEY_ENABLED)) != |
| 2157 | WPA_CAPABILITY_PEERKEY_ENABLED) { |
| 2158 | wpa_printf(MSG_INFO, "TDLS: Invalid RSN Capabilities in " |
| 2159 | "TPK M1"); |
| 2160 | status = WLAN_STATUS_INVALID_RSN_IE_CAPAB; |
| 2161 | goto error; |
| 2162 | } |
| 2163 | |
| 2164 | /* Lifetime */ |
| 2165 | if (kde.key_lifetime == NULL) { |
| 2166 | wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M1"); |
| 2167 | status = WLAN_STATUS_UNACCEPTABLE_LIFETIME; |
| 2168 | goto error; |
| 2169 | } |
| 2170 | timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime; |
| 2171 | lifetime = WPA_GET_LE32(timeoutie->value); |
| 2172 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds", lifetime); |
| 2173 | if (lifetime < 300) { |
| 2174 | wpa_printf(MSG_INFO, "TDLS: Too short TPK lifetime"); |
| 2175 | status = WLAN_STATUS_UNACCEPTABLE_LIFETIME; |
| 2176 | goto error; |
| 2177 | } |
| 2178 | |
| 2179 | skip_rsn: |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2180 | #ifdef CONFIG_TDLS_TESTING |
| 2181 | if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) { |
| 2182 | if (os_memcmp(sm->own_addr, peer->addr, ETH_ALEN) < 0) { |
| 2183 | /* |
| 2184 | * The request frame from us is going to win, so do not |
| 2185 | * replace information based on this request frame from |
| 2186 | * the peer. |
| 2187 | */ |
| 2188 | goto skip_rsn_check; |
| 2189 | } |
| 2190 | } |
| 2191 | #endif /* CONFIG_TDLS_TESTING */ |
| 2192 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2193 | peer->initiator = 0; /* Need to check */ |
| 2194 | peer->dtoken = dtoken; |
| 2195 | |
| 2196 | if (!wpa_tdls_get_privacy(sm)) { |
| 2197 | peer->rsnie_i_len = 0; |
| 2198 | peer->rsnie_p_len = 0; |
| 2199 | peer->cipher = WPA_CIPHER_NONE; |
| 2200 | goto skip_rsn_check; |
| 2201 | } |
| 2202 | |
| 2203 | ftie = (struct wpa_tdls_ftie *) kde.ftie; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2204 | os_memcpy(peer->rsnie_i, kde.rsn_ie, kde.rsn_ie_len); |
| 2205 | peer->rsnie_i_len = kde.rsn_ie_len; |
| 2206 | peer->cipher = cipher; |
| 2207 | |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 2208 | if (os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) != 0 || |
| 2209 | !tdls_nonce_set(peer->inonce)) { |
Sunil Dutt | 6102472 | 2013-09-15 12:09:40 -0700 | [diff] [blame] | 2210 | /* |
| 2211 | * There is no point in updating the RNonce for every obtained |
| 2212 | * TPK M1 frame (e.g., retransmission due to timeout) with the |
| 2213 | * same INonce (SNonce in FTIE). However, if the TPK M1 is |
| 2214 | * retransmitted with a different INonce, update the RNonce |
| 2215 | * since this is for a new TDLS session. |
| 2216 | */ |
| 2217 | wpa_printf(MSG_DEBUG, |
| 2218 | "TDLS: New TPK M1 INonce - generate new RNonce"); |
| 2219 | os_memcpy(peer->inonce, ftie->Snonce, WPA_NONCE_LEN); |
| 2220 | if (os_get_random(peer->rnonce, WPA_NONCE_LEN)) { |
| 2221 | wpa_msg(sm->ctx->ctx, MSG_WARNING, |
| 2222 | "TDLS: Failed to get random data for responder nonce"); |
Sunil Dutt | 6102472 | 2013-09-15 12:09:40 -0700 | [diff] [blame] | 2223 | goto error; |
| 2224 | } |
Jouni Malinen | c580b55 | 2017-09-22 11:03:15 +0300 | [diff] [blame] | 2225 | peer->tk_set = 0; /* A new nonce results in a new TK */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2226 | } |
| 2227 | |
| 2228 | #if 0 |
| 2229 | /* get version info from RSNIE received from Peer */ |
| 2230 | hdr = (struct rsn_ie_hdr *) kde.rsn_ie; |
| 2231 | rsn_ver = WPA_GET_LE16(hdr->version); |
| 2232 | |
| 2233 | /* use min(peer's version, out version) */ |
| 2234 | if (rsn_ver > RSN_VERSION) |
| 2235 | rsn_ver = RSN_VERSION; |
| 2236 | |
| 2237 | hdr = (struct rsn_ie_hdr *) peer->rsnie_p; |
| 2238 | |
| 2239 | hdr->elem_id = WLAN_EID_RSN; |
| 2240 | WPA_PUT_LE16(hdr->version, rsn_ver); |
| 2241 | pos = (u8 *) (hdr + 1); |
| 2242 | |
| 2243 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED); |
| 2244 | pos += RSN_SELECTOR_LEN; |
| 2245 | /* Include only the selected cipher in pairwise cipher suite */ |
| 2246 | WPA_PUT_LE16(pos, 1); |
| 2247 | pos += 2; |
| 2248 | if (cipher == WPA_CIPHER_CCMP) |
| 2249 | RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); |
| 2250 | pos += RSN_SELECTOR_LEN; |
| 2251 | |
| 2252 | WPA_PUT_LE16(pos, 1); |
| 2253 | pos += 2; |
| 2254 | RSN_SELECTOR_PUT(pos, RSN_AUTH_KEY_MGMT_TPK_HANDSHAKE); |
| 2255 | pos += RSN_SELECTOR_LEN; |
| 2256 | |
| 2257 | rsn_capab = WPA_CAPABILITY_PEERKEY_ENABLED; |
| 2258 | rsn_capab |= RSN_NUM_REPLAY_COUNTERS_16 << 2; |
| 2259 | WPA_PUT_LE16(pos, rsn_capab); |
| 2260 | pos += 2; |
| 2261 | |
| 2262 | hdr->len = (pos - peer->rsnie_p) - 2; |
| 2263 | peer->rsnie_p_len = pos - peer->rsnie_p; |
| 2264 | #endif |
| 2265 | |
| 2266 | /* temp fix: validation of RSNIE later */ |
| 2267 | os_memcpy(peer->rsnie_p, peer->rsnie_i, peer->rsnie_i_len); |
| 2268 | peer->rsnie_p_len = peer->rsnie_i_len; |
| 2269 | |
| 2270 | wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE for TPK handshake", |
| 2271 | peer->rsnie_p, peer->rsnie_p_len); |
| 2272 | |
| 2273 | peer->lifetime = lifetime; |
| 2274 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2275 | if (peer->mld_link_id >= 0) |
| 2276 | wpa_printf(MSG_DEBUG, "TDLS: Use link ID %u for TPK derivation", |
| 2277 | peer->mld_link_id); |
| 2278 | wpa_tdls_generate_tpk(peer, sm->own_addr, |
| 2279 | wpa_tdls_get_link_bssid(sm, peer->mld_link_id)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2280 | |
| 2281 | skip_rsn_check: |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 2282 | #ifdef CONFIG_TDLS_TESTING |
| 2283 | if (tdls_testing & TDLS_TESTING_CONCURRENT_INIT) |
| 2284 | goto skip_add_peer; |
| 2285 | #endif /* CONFIG_TDLS_TESTING */ |
| 2286 | |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2287 | /* add supported rates, capabilities, and qos_info to the TDLS peer */ |
| 2288 | if (wpa_tdls_addset_peer(sm, peer, 1) < 0) |
Dmitry Shmidt | 43cb578 | 2014-06-16 16:23:22 -0700 | [diff] [blame] | 2289 | goto error; |
| 2290 | |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 2291 | #ifdef CONFIG_TDLS_TESTING |
| 2292 | skip_add_peer: |
| 2293 | #endif /* CONFIG_TDLS_TESTING */ |
Sunil Dutt | 73b28cc | 2013-09-30 17:38:41 +0300 | [diff] [blame] | 2294 | peer->tpk_in_progress = 1; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2295 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2296 | wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Response / TPK M2"); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2297 | if (wpa_tdls_send_tpk_m2(sm, src_addr, dtoken, lnkid, peer) < 0) { |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2298 | wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2299 | goto error; |
| 2300 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2301 | |
Roshan Pius | 3a1667e | 2018-07-03 15:17:14 -0700 | [diff] [blame] | 2302 | #ifdef CONFIG_TDLS_TESTING |
| 2303 | if (tdls_testing & TDLS_TESTING_DOUBLE_TPK_M2) { |
| 2304 | wpa_printf(MSG_INFO, "TDLS: Testing - Send another TPK M2"); |
| 2305 | wpa_tdls_send_tpk_m2(sm, src_addr, dtoken, lnkid, peer); |
| 2306 | } |
| 2307 | #endif /* CONFIG_TDLS_TESTING */ |
| 2308 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2309 | return 0; |
| 2310 | |
| 2311 | error: |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 2312 | wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_RESPONSE, dtoken, 0, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2313 | status); |
Dmitry Shmidt | 43cb578 | 2014-06-16 16:23:22 -0700 | [diff] [blame] | 2314 | if (peer) |
| 2315 | wpa_tdls_peer_free(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2316 | return -1; |
| 2317 | } |
| 2318 | |
| 2319 | |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 2320 | static int wpa_tdls_enable_link(struct wpa_sm *sm, struct wpa_tdls_peer *peer) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2321 | { |
| 2322 | peer->tpk_success = 1; |
Sunil Dutt | 73b28cc | 2013-09-30 17:38:41 +0300 | [diff] [blame] | 2323 | peer->tpk_in_progress = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2324 | eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer); |
| 2325 | if (wpa_tdls_get_privacy(sm)) { |
| 2326 | u32 lifetime = peer->lifetime; |
| 2327 | /* |
| 2328 | * Start the initiator process a bit earlier to avoid race |
| 2329 | * condition with the responder sending teardown request. |
| 2330 | */ |
| 2331 | if (lifetime > 3 && peer->initiator) |
| 2332 | lifetime -= 3; |
| 2333 | eloop_register_timeout(lifetime, 0, wpa_tdls_tpk_timeout, |
| 2334 | sm, peer); |
| 2335 | #ifdef CONFIG_TDLS_TESTING |
Hai Shalom | 74f70d4 | 2019-02-11 14:42:39 -0800 | [diff] [blame] | 2336 | if (tdls_testing & TDLS_TESTING_NO_TPK_EXPIRATION) { |
| 2337 | wpa_printf(MSG_DEBUG, |
| 2338 | "TDLS: Testing - disable TPK expiration"); |
| 2339 | eloop_cancel_timeout(wpa_tdls_tpk_timeout, sm, peer); |
| 2340 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2341 | #endif /* CONFIG_TDLS_TESTING */ |
| 2342 | } |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2343 | |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 2344 | if (peer->reconfig_key && wpa_tdls_set_key(sm, peer) < 0) { |
| 2345 | wpa_printf(MSG_INFO, "TDLS: Could not configure key to the " |
| 2346 | "driver"); |
| 2347 | return -1; |
| 2348 | } |
| 2349 | peer->reconfig_key = 0; |
| 2350 | |
| 2351 | return wpa_sm_tdls_oper(sm, TDLS_ENABLE_LINK, peer->addr); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2352 | } |
| 2353 | |
| 2354 | |
| 2355 | static int wpa_tdls_process_tpk_m2(struct wpa_sm *sm, const u8 *src_addr, |
| 2356 | const u8 *buf, size_t len) |
| 2357 | { |
| 2358 | struct wpa_tdls_peer *peer; |
| 2359 | struct wpa_eapol_ie_parse kde; |
| 2360 | struct wpa_ie_data ie; |
| 2361 | int cipher; |
| 2362 | struct wpa_tdls_ftie *ftie; |
| 2363 | struct wpa_tdls_timeoutie *timeoutie; |
| 2364 | struct wpa_tdls_lnkid *lnkid; |
| 2365 | u32 lifetime; |
| 2366 | u8 dtoken; |
| 2367 | int ielen; |
| 2368 | u16 status; |
| 2369 | const u8 *pos; |
Dmitry Shmidt | 292b0c3 | 2013-11-22 12:54:42 -0800 | [diff] [blame] | 2370 | int ret = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2371 | |
| 2372 | wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Response / TPK M2 " |
| 2373 | "(Peer " MACSTR ")", MAC2STR(src_addr)); |
| 2374 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 2375 | if (ether_addr_equal(peer->addr, src_addr)) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2376 | break; |
| 2377 | } |
| 2378 | if (peer == NULL) { |
| 2379 | wpa_printf(MSG_INFO, "TDLS: No matching peer found for " |
| 2380 | "TPK M2: " MACSTR, MAC2STR(src_addr)); |
| 2381 | return -1; |
| 2382 | } |
Dmitry Shmidt | 0ccb66e | 2013-03-29 16:41:28 -0700 | [diff] [blame] | 2383 | if (!peer->initiator) { |
| 2384 | /* |
| 2385 | * This may happen if both devices try to initiate TDLS at the |
| 2386 | * same time and we accept the TPK M1 from the peer in |
| 2387 | * wpa_tdls_process_tpk_m1() and clear our previous state. |
| 2388 | */ |
| 2389 | wpa_printf(MSG_INFO, "TDLS: We were not the initiator, so " |
| 2390 | "ignore TPK M2 from " MACSTR, MAC2STR(src_addr)); |
| 2391 | return -1; |
| 2392 | } |
Dmitry Shmidt | 7d56b75 | 2015-12-22 10:59:44 -0800 | [diff] [blame] | 2393 | |
| 2394 | if (peer->tpk_success) { |
| 2395 | wpa_printf(MSG_INFO, "TDLS: Ignore incoming TPK M2 retry, from " |
| 2396 | MACSTR " as TPK M3 was already sent", |
| 2397 | MAC2STR(src_addr)); |
| 2398 | return 0; |
| 2399 | } |
| 2400 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2401 | wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_REQUEST); |
| 2402 | |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2403 | if (len < 3 + 2 + 1) { |
Sunil Dutt | d0ef38b | 2013-09-30 17:34:13 +0300 | [diff] [blame] | 2404 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2405 | return -1; |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2406 | } |
| 2407 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2408 | pos = buf; |
| 2409 | pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */; |
| 2410 | status = WPA_GET_LE16(pos); |
| 2411 | pos += 2 /* status code */; |
| 2412 | |
| 2413 | if (status != WLAN_STATUS_SUCCESS) { |
| 2414 | wpa_printf(MSG_INFO, "TDLS: Status code in TPK M2: %u", |
| 2415 | status); |
Sunil Dutt | d0ef38b | 2013-09-30 17:34:13 +0300 | [diff] [blame] | 2416 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2417 | return -1; |
| 2418 | } |
| 2419 | |
| 2420 | status = WLAN_STATUS_UNSPECIFIED_FAILURE; |
| 2421 | |
| 2422 | /* TODO: need to verify dialog token matches here or in kernel */ |
| 2423 | dtoken = *pos++; /* dialog token */ |
| 2424 | |
| 2425 | wpa_printf(MSG_DEBUG, "TDLS: Dialog Token in TPK M2 %d", dtoken); |
| 2426 | |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2427 | if (len < 3 + 2 + 1 + 2) { |
Sunil Dutt | d0ef38b | 2013-09-30 17:34:13 +0300 | [diff] [blame] | 2428 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2429 | return -1; |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2430 | } |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2431 | |
| 2432 | /* capability information */ |
| 2433 | peer->capability = WPA_GET_LE16(pos); |
| 2434 | pos += 2; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2435 | |
| 2436 | ielen = len - (pos - buf); /* start of IE in buf */ |
Dmitry Shmidt | 7f65602 | 2015-02-25 14:36:37 -0800 | [diff] [blame] | 2437 | |
| 2438 | /* |
| 2439 | * Don't reject the message if failing to parse IEs. The IEs we need are |
| 2440 | * explicitly checked below. Some APs may add arbitrary padding to the |
| 2441 | * end of short TDLS frames and that would look like invalid IEs. |
| 2442 | */ |
| 2443 | if (wpa_supplicant_parse_ies(pos, ielen, &kde) < 0) |
| 2444 | wpa_printf(MSG_DEBUG, |
| 2445 | "TDLS: Failed to parse IEs in TPK M2 - ignore as an interop workaround"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2446 | |
| 2447 | #ifdef CONFIG_TDLS_TESTING |
| 2448 | if (tdls_testing & TDLS_TESTING_DECLINE_RESP) { |
| 2449 | wpa_printf(MSG_DEBUG, "TDLS: Testing - decline response"); |
| 2450 | status = WLAN_STATUS_REQUEST_DECLINED; |
| 2451 | goto error; |
| 2452 | } |
| 2453 | #endif /* CONFIG_TDLS_TESTING */ |
| 2454 | |
| 2455 | if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) { |
| 2456 | wpa_printf(MSG_INFO, "TDLS: No valid Link Identifier IE in " |
| 2457 | "TPK M2"); |
| 2458 | goto error; |
| 2459 | } |
| 2460 | wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M2", |
| 2461 | kde.lnkid, kde.lnkid_len); |
| 2462 | lnkid = (struct wpa_tdls_lnkid *) kde.lnkid; |
| 2463 | |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 2464 | if (!ether_addr_equal(sm->bssid, |
| 2465 | wpa_tdls_get_link_bssid(sm, peer->mld_link_id))) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2466 | wpa_printf(MSG_INFO, "TDLS: TPK M2 from different BSS"); |
| 2467 | status = WLAN_STATUS_NOT_IN_SAME_BSS; |
| 2468 | goto error; |
| 2469 | } |
| 2470 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2471 | if (copy_supp_rates(&kde, peer) < 0) |
| 2472 | goto error; |
| 2473 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 2474 | if (copy_peer_ht_capab(&kde, peer) < 0) |
| 2475 | goto error; |
| 2476 | |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 2477 | if (copy_peer_vht_capab(&kde, peer) < 0 || |
| 2478 | copy_peer_he_capab(&kde, peer) < 0 || |
| 2479 | copy_peer_he_6ghz_band_capab(&kde, peer) < 0) |
Dmitry Shmidt | 33e38bf | 2013-02-27 12:56:00 -0800 | [diff] [blame] | 2480 | goto error; |
| 2481 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2482 | if (copy_peer_eht_capab(&kde, peer) < 0) |
| 2483 | goto error; |
| 2484 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 2485 | if (copy_peer_ext_capab(&kde, peer) < 0) |
| 2486 | goto error; |
| 2487 | |
Dmitry Shmidt | 344abd3 | 2014-01-14 13:17:00 -0800 | [diff] [blame] | 2488 | if (copy_peer_supp_channels(&kde, peer) < 0) |
| 2489 | goto error; |
| 2490 | |
| 2491 | if (copy_peer_supp_oper_classes(&kde, peer) < 0) |
| 2492 | goto error; |
| 2493 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 2494 | peer->qos_info = kde.qosinfo; |
| 2495 | |
Dmitry Shmidt | b36ed7c | 2014-03-17 10:57:26 -0700 | [diff] [blame] | 2496 | /* Overwrite with the qos_info obtained in WMM IE */ |
| 2497 | if (copy_peer_wmm_capab(&kde, peer) < 0) |
| 2498 | goto error; |
| 2499 | |
Dmitry Shmidt | 51b6ea8 | 2013-05-08 10:42:09 -0700 | [diff] [blame] | 2500 | peer->aid = kde.aid; |
| 2501 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2502 | if (!wpa_tdls_get_privacy(sm)) { |
| 2503 | peer->rsnie_p_len = 0; |
| 2504 | peer->cipher = WPA_CIPHER_NONE; |
| 2505 | goto skip_rsn; |
| 2506 | } |
| 2507 | |
| 2508 | if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie) || |
| 2509 | kde.rsn_ie == NULL) { |
| 2510 | wpa_printf(MSG_INFO, "TDLS: No FTIE or RSN IE in TPK M2"); |
| 2511 | status = WLAN_STATUS_INVALID_PARAMETERS; |
| 2512 | goto error; |
| 2513 | } |
| 2514 | wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2", |
| 2515 | kde.rsn_ie, kde.rsn_ie_len); |
| 2516 | |
Dmitry Shmidt | 09f57ba | 2014-06-10 16:07:13 -0700 | [diff] [blame] | 2517 | if (kde.rsn_ie_len > TDLS_MAX_IE_LEN) { |
| 2518 | wpa_printf(MSG_INFO, |
| 2519 | "TDLS: Too long Responder RSN IE in TPK M2"); |
| 2520 | status = WLAN_STATUS_INVALID_RSNIE; |
| 2521 | goto error; |
| 2522 | } |
| 2523 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2524 | /* |
| 2525 | * FIX: bitwise comparison of RSN IE is not the correct way of |
| 2526 | * validation this. It can be different, but certain fields must |
| 2527 | * match. Since we list only a single pairwise cipher in TPK M1, the |
| 2528 | * memcmp is likely to work in most cases, though. |
| 2529 | */ |
| 2530 | if (kde.rsn_ie_len != peer->rsnie_i_len || |
| 2531 | os_memcmp(peer->rsnie_i, kde.rsn_ie, peer->rsnie_i_len) != 0) { |
| 2532 | wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M2 does " |
| 2533 | "not match with RSN IE used in TPK M1"); |
| 2534 | wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Sent in TPK M1", |
| 2535 | peer->rsnie_i, peer->rsnie_i_len); |
| 2536 | wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M2", |
| 2537 | kde.rsn_ie, kde.rsn_ie_len); |
| 2538 | status = WLAN_STATUS_INVALID_RSNIE; |
| 2539 | goto error; |
| 2540 | } |
| 2541 | |
| 2542 | if (wpa_parse_wpa_ie_rsn(kde.rsn_ie, kde.rsn_ie_len, &ie) < 0) { |
| 2543 | wpa_printf(MSG_INFO, "TDLS: Failed to parse RSN IE in TPK M2"); |
| 2544 | status = WLAN_STATUS_INVALID_RSNIE; |
| 2545 | goto error; |
| 2546 | } |
| 2547 | |
| 2548 | cipher = ie.pairwise_cipher; |
| 2549 | if (cipher == WPA_CIPHER_CCMP) { |
| 2550 | wpa_printf(MSG_DEBUG, "TDLS: Using CCMP for direct link"); |
| 2551 | cipher = WPA_CIPHER_CCMP; |
| 2552 | } else { |
| 2553 | wpa_printf(MSG_INFO, "TDLS: No acceptable cipher in TPK M2"); |
| 2554 | status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; |
| 2555 | goto error; |
| 2556 | } |
| 2557 | |
| 2558 | wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M2", |
| 2559 | kde.ftie, sizeof(*ftie)); |
| 2560 | ftie = (struct wpa_tdls_ftie *) kde.ftie; |
| 2561 | |
Dmitry Shmidt | 57c2d39 | 2016-02-23 13:40:19 -0800 | [diff] [blame] | 2562 | if (os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) != 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2563 | wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M2 does " |
| 2564 | "not match with FTIE SNonce used in TPK M1"); |
| 2565 | /* Silently discard the frame */ |
| 2566 | return -1; |
| 2567 | } |
| 2568 | |
| 2569 | /* Responder Nonce and RSN IE */ |
| 2570 | os_memcpy(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN); |
| 2571 | os_memcpy(peer->rsnie_p, kde.rsn_ie, kde.rsn_ie_len); |
| 2572 | peer->rsnie_p_len = kde.rsn_ie_len; |
| 2573 | peer->cipher = cipher; |
| 2574 | |
| 2575 | /* Lifetime */ |
| 2576 | if (kde.key_lifetime == NULL) { |
| 2577 | wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M2"); |
| 2578 | status = WLAN_STATUS_UNACCEPTABLE_LIFETIME; |
| 2579 | goto error; |
| 2580 | } |
| 2581 | timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime; |
| 2582 | lifetime = WPA_GET_LE32(timeoutie->value); |
| 2583 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M2", |
| 2584 | lifetime); |
| 2585 | if (lifetime != peer->lifetime) { |
| 2586 | wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in " |
| 2587 | "TPK M2 (expected %u)", lifetime, peer->lifetime); |
| 2588 | status = WLAN_STATUS_UNACCEPTABLE_LIFETIME; |
| 2589 | goto error; |
| 2590 | } |
| 2591 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2592 | if (peer->mld_link_id >= 0) |
| 2593 | wpa_printf(MSG_DEBUG, "TDLS: Use link ID %u for TPK derivation", |
| 2594 | peer->mld_link_id); |
| 2595 | wpa_tdls_generate_tpk(peer, sm->own_addr, |
| 2596 | wpa_tdls_get_link_bssid(sm, peer->mld_link_id)); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2597 | |
| 2598 | /* Process MIC check to see if TPK M2 is right */ |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 2599 | if (wpa_supplicant_verify_tdls_mic(2, peer, (const u8 *) lnkid, |
| 2600 | (const u8 *) timeoutie, ftie, |
| 2601 | kde.ftie_len) < 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2602 | /* Discard the frame */ |
| 2603 | wpa_tdls_del_key(sm, peer); |
Sunil Dutt | 38ffd88 | 2013-09-30 17:23:23 +0300 | [diff] [blame] | 2604 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2605 | return -1; |
| 2606 | } |
| 2607 | |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 2608 | if (wpa_tdls_set_key(sm, peer) < 0) { |
| 2609 | /* |
| 2610 | * Some drivers may not be able to config the key prior to full |
| 2611 | * STA entry having been configured. |
| 2612 | */ |
| 2613 | wpa_printf(MSG_DEBUG, "TDLS: Try to configure TPK again after " |
| 2614 | "STA entry is complete"); |
| 2615 | peer->reconfig_key = 1; |
| 2616 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2617 | |
| 2618 | skip_rsn: |
| 2619 | peer->dtoken = dtoken; |
| 2620 | |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2621 | /* add supported rates, capabilities, and qos_info to the TDLS peer */ |
| 2622 | if (wpa_tdls_addset_peer(sm, peer, 0) < 0) |
| 2623 | goto error; |
| 2624 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2625 | wpa_printf(MSG_DEBUG, "TDLS: Sending TDLS Setup Confirm / " |
| 2626 | "TPK Handshake Message 3"); |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2627 | if (wpa_tdls_send_tpk_m3(sm, src_addr, dtoken, lnkid, peer) < 0) |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 2628 | goto error_no_msg; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2629 | |
Dmitry Shmidt | 292b0c3 | 2013-11-22 12:54:42 -0800 | [diff] [blame] | 2630 | if (!peer->tpk_success) { |
| 2631 | /* |
| 2632 | * Enable Link only when tpk_success is 0, signifying that this |
| 2633 | * processing of TPK M2 frame is not because of a retransmission |
| 2634 | * during TDLS setup handshake. |
| 2635 | */ |
| 2636 | ret = wpa_tdls_enable_link(sm, peer); |
| 2637 | if (ret < 0) { |
| 2638 | wpa_printf(MSG_DEBUG, "TDLS: Could not enable link"); |
| 2639 | wpa_tdls_do_teardown( |
| 2640 | sm, peer, |
| 2641 | WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED); |
| 2642 | } |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 2643 | } |
| 2644 | return ret; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2645 | |
| 2646 | error: |
Dmitry Shmidt | 9ead16e | 2014-10-07 13:15:23 -0700 | [diff] [blame] | 2647 | wpa_tdls_send_error(sm, src_addr, WLAN_TDLS_SETUP_CONFIRM, dtoken, 1, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2648 | status); |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 2649 | error_no_msg: |
Sunil Dutt | d0ef38b | 2013-09-30 17:34:13 +0300 | [diff] [blame] | 2650 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2651 | return -1; |
| 2652 | } |
| 2653 | |
| 2654 | |
| 2655 | static int wpa_tdls_process_tpk_m3(struct wpa_sm *sm, const u8 *src_addr, |
| 2656 | const u8 *buf, size_t len) |
| 2657 | { |
| 2658 | struct wpa_tdls_peer *peer; |
| 2659 | struct wpa_eapol_ie_parse kde; |
| 2660 | struct wpa_tdls_ftie *ftie; |
| 2661 | struct wpa_tdls_timeoutie *timeoutie; |
| 2662 | struct wpa_tdls_lnkid *lnkid; |
| 2663 | int ielen; |
| 2664 | u16 status; |
| 2665 | const u8 *pos; |
| 2666 | u32 lifetime; |
Dmitry Shmidt | 292b0c3 | 2013-11-22 12:54:42 -0800 | [diff] [blame] | 2667 | int ret = 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2668 | |
| 2669 | wpa_printf(MSG_DEBUG, "TDLS: Received TDLS Setup Confirm / TPK M3 " |
| 2670 | "(Peer " MACSTR ")", MAC2STR(src_addr)); |
| 2671 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 2672 | if (ether_addr_equal(peer->addr, src_addr)) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2673 | break; |
| 2674 | } |
| 2675 | if (peer == NULL) { |
| 2676 | wpa_printf(MSG_INFO, "TDLS: No matching peer found for " |
| 2677 | "TPK M3: " MACSTR, MAC2STR(src_addr)); |
| 2678 | return -1; |
| 2679 | } |
| 2680 | wpa_tdls_tpk_retry_timeout_cancel(sm, peer, WLAN_TDLS_SETUP_RESPONSE); |
| 2681 | |
| 2682 | if (len < 3 + 3) |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2683 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2684 | pos = buf; |
| 2685 | pos += 1 /* pkt_type */ + 1 /* Category */ + 1 /* Action */; |
| 2686 | |
| 2687 | status = WPA_GET_LE16(pos); |
| 2688 | |
| 2689 | if (status != 0) { |
| 2690 | wpa_printf(MSG_INFO, "TDLS: Status code in TPK M3: %u", |
| 2691 | status); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2692 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2693 | } |
| 2694 | pos += 2 /* status code */ + 1 /* dialog token */; |
| 2695 | |
| 2696 | ielen = len - (pos - buf); /* start of IE in buf */ |
Dmitry Shmidt | 0c08fdc | 2014-06-20 10:16:40 -0700 | [diff] [blame] | 2697 | |
| 2698 | /* |
| 2699 | * Don't reject the message if failing to parse IEs. The IEs we need are |
| 2700 | * explicitly checked below. Some APs piggy-back broken IEs to the end |
| 2701 | * of a TDLS Confirm packet, which will fail the link if we don't ignore |
| 2702 | * this error. |
| 2703 | */ |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2704 | if (wpa_supplicant_parse_ies((const u8 *) pos, ielen, &kde) < 0) { |
Dmitry Shmidt | 0c08fdc | 2014-06-20 10:16:40 -0700 | [diff] [blame] | 2705 | wpa_printf(MSG_DEBUG, |
| 2706 | "TDLS: Failed to parse KDEs in TPK M3 - ignore as an interop workaround"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2707 | } |
| 2708 | |
| 2709 | if (kde.lnkid == NULL || kde.lnkid_len < 3 * ETH_ALEN) { |
| 2710 | wpa_printf(MSG_INFO, "TDLS: No Link Identifier IE in TPK M3"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2711 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2712 | } |
| 2713 | wpa_hexdump(MSG_DEBUG, "TDLS: Link ID Received from TPK M3", |
| 2714 | (u8 *) kde.lnkid, kde.lnkid_len); |
| 2715 | lnkid = (struct wpa_tdls_lnkid *) kde.lnkid; |
| 2716 | |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 2717 | if (!ether_addr_equal(wpa_tdls_get_link_bssid(sm, peer->mld_link_id), |
| 2718 | lnkid->bssid)) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2719 | wpa_printf(MSG_INFO, "TDLS: TPK M3 from diff BSS"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2720 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2721 | } |
| 2722 | |
| 2723 | if (!wpa_tdls_get_privacy(sm)) |
| 2724 | goto skip_rsn; |
| 2725 | |
| 2726 | if (kde.ftie == NULL || kde.ftie_len < sizeof(*ftie)) { |
| 2727 | wpa_printf(MSG_INFO, "TDLS: No FTIE in TPK M3"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2728 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2729 | } |
| 2730 | wpa_hexdump(MSG_DEBUG, "TDLS: FTIE Received from TPK M3", |
| 2731 | kde.ftie, sizeof(*ftie)); |
| 2732 | ftie = (struct wpa_tdls_ftie *) kde.ftie; |
| 2733 | |
| 2734 | if (kde.rsn_ie == NULL) { |
| 2735 | wpa_printf(MSG_INFO, "TDLS: No RSN IE in TPK M3"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2736 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2737 | } |
| 2738 | wpa_hexdump(MSG_DEBUG, "TDLS: RSN IE Received from TPK M3", |
| 2739 | kde.rsn_ie, kde.rsn_ie_len); |
| 2740 | if (kde.rsn_ie_len != peer->rsnie_p_len || |
| 2741 | os_memcmp(kde.rsn_ie, peer->rsnie_p, peer->rsnie_p_len) != 0) { |
| 2742 | wpa_printf(MSG_INFO, "TDLS: RSN IE in TPK M3 does not match " |
| 2743 | "with the one sent in TPK M2"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2744 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2745 | } |
| 2746 | |
Dmitry Shmidt | 57c2d39 | 2016-02-23 13:40:19 -0800 | [diff] [blame] | 2747 | if (os_memcmp(peer->rnonce, ftie->Anonce, WPA_NONCE_LEN) != 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2748 | wpa_printf(MSG_INFO, "TDLS: FTIE ANonce in TPK M3 does " |
| 2749 | "not match with FTIE ANonce used in TPK M2"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2750 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2751 | } |
| 2752 | |
Dmitry Shmidt | 57c2d39 | 2016-02-23 13:40:19 -0800 | [diff] [blame] | 2753 | if (os_memcmp(peer->inonce, ftie->Snonce, WPA_NONCE_LEN) != 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2754 | wpa_printf(MSG_INFO, "TDLS: FTIE SNonce in TPK M3 does not " |
| 2755 | "match with FTIE SNonce used in TPK M1"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2756 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2757 | } |
| 2758 | |
| 2759 | if (kde.key_lifetime == NULL) { |
| 2760 | wpa_printf(MSG_INFO, "TDLS: No Key Lifetime IE in TPK M3"); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2761 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2762 | } |
| 2763 | timeoutie = (struct wpa_tdls_timeoutie *) kde.key_lifetime; |
| 2764 | wpa_hexdump(MSG_DEBUG, "TDLS: Timeout IE Received from TPK M3", |
| 2765 | (u8 *) timeoutie, sizeof(*timeoutie)); |
| 2766 | lifetime = WPA_GET_LE32(timeoutie->value); |
| 2767 | wpa_printf(MSG_DEBUG, "TDLS: TPK lifetime %u seconds in TPK M3", |
| 2768 | lifetime); |
| 2769 | if (lifetime != peer->lifetime) { |
| 2770 | wpa_printf(MSG_INFO, "TDLS: Unexpected TPK lifetime %u in " |
| 2771 | "TPK M3 (expected %u)", lifetime, peer->lifetime); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2772 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2773 | } |
| 2774 | |
Sunil Ravi | 38ad1ed | 2023-01-17 23:58:31 +0000 | [diff] [blame] | 2775 | if (wpa_supplicant_verify_tdls_mic(3, peer, (const u8 *) lnkid, |
| 2776 | (const u8 *) timeoutie, ftie, |
| 2777 | kde.ftie_len) < 0) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2778 | wpa_tdls_del_key(sm, peer); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2779 | goto error; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2780 | } |
| 2781 | |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 2782 | if (wpa_tdls_set_key(sm, peer) < 0) { |
| 2783 | /* |
| 2784 | * Some drivers may not be able to config the key prior to full |
| 2785 | * STA entry having been configured. |
| 2786 | */ |
| 2787 | wpa_printf(MSG_DEBUG, "TDLS: Try to configure TPK again after " |
| 2788 | "STA entry is complete"); |
| 2789 | peer->reconfig_key = 1; |
| 2790 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2791 | |
| 2792 | skip_rsn: |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2793 | /* add supported rates, capabilities, and qos_info to the TDLS peer */ |
| 2794 | if (wpa_tdls_addset_peer(sm, peer, 0) < 0) |
| 2795 | goto error; |
| 2796 | |
Dmitry Shmidt | 292b0c3 | 2013-11-22 12:54:42 -0800 | [diff] [blame] | 2797 | if (!peer->tpk_success) { |
| 2798 | /* |
| 2799 | * Enable Link only when tpk_success is 0, signifying that this |
| 2800 | * processing of TPK M3 frame is not because of a retransmission |
| 2801 | * during TDLS setup handshake. |
| 2802 | */ |
| 2803 | ret = wpa_tdls_enable_link(sm, peer); |
| 2804 | if (ret < 0) { |
| 2805 | wpa_printf(MSG_DEBUG, "TDLS: Could not enable link"); |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2806 | goto error; |
Dmitry Shmidt | 292b0c3 | 2013-11-22 12:54:42 -0800 | [diff] [blame] | 2807 | } |
Dmitry Shmidt | 8da800a | 2013-04-24 12:57:01 -0700 | [diff] [blame] | 2808 | } |
| 2809 | return ret; |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2810 | error: |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2811 | wpa_tdls_do_teardown(sm, peer, WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED); |
Sunil Dutt | adce9cf | 2013-09-15 11:51:00 -0700 | [diff] [blame] | 2812 | return -1; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2813 | } |
| 2814 | |
| 2815 | |
| 2816 | static u8 * wpa_add_tdls_timeoutie(u8 *pos, u8 *ie, size_t ie_len, u32 tsecs) |
| 2817 | { |
| 2818 | struct wpa_tdls_timeoutie *lifetime = (struct wpa_tdls_timeoutie *) ie; |
| 2819 | |
| 2820 | os_memset(lifetime, 0, ie_len); |
| 2821 | lifetime->ie_type = WLAN_EID_TIMEOUT_INTERVAL; |
| 2822 | lifetime->ie_len = sizeof(struct wpa_tdls_timeoutie) - 2; |
| 2823 | lifetime->interval_type = WLAN_TIMEOUT_KEY_LIFETIME; |
| 2824 | WPA_PUT_LE32(lifetime->value, tsecs); |
| 2825 | os_memcpy(pos, ie, ie_len); |
| 2826 | return pos + ie_len; |
| 2827 | } |
| 2828 | |
| 2829 | |
| 2830 | /** |
| 2831 | * wpa_tdls_start - Initiate TDLS handshake (send TPK Handshake Message 1) |
| 2832 | * @sm: Pointer to WPA state machine data from wpa_sm_init() |
| 2833 | * @peer: MAC address of the peer STA |
| 2834 | * Returns: 0 on success, or -1 on failure |
| 2835 | * |
| 2836 | * Send TPK Handshake Message 1 info to driver to start TDLS |
| 2837 | * handshake with the peer. |
| 2838 | */ |
| 2839 | int wpa_tdls_start(struct wpa_sm *sm, const u8 *addr) |
| 2840 | { |
| 2841 | struct wpa_tdls_peer *peer; |
| 2842 | int tdls_prohibited = sm->tdls_prohibited; |
Hai Shalom | 6084025 | 2021-02-19 19:02:11 -0800 | [diff] [blame] | 2843 | int res; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2844 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2845 | if (sm->tdls_disabled || !sm->tdls_supported) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2846 | return -1; |
| 2847 | |
| 2848 | #ifdef CONFIG_TDLS_TESTING |
| 2849 | if ((tdls_testing & TDLS_TESTING_IGNORE_AP_PROHIBIT) && |
| 2850 | tdls_prohibited) { |
| 2851 | wpa_printf(MSG_DEBUG, "TDLS: Testing - ignore AP prohibition " |
| 2852 | "on TDLS"); |
| 2853 | tdls_prohibited = 0; |
| 2854 | } |
| 2855 | #endif /* CONFIG_TDLS_TESTING */ |
| 2856 | |
| 2857 | if (tdls_prohibited) { |
| 2858 | wpa_printf(MSG_DEBUG, "TDLS: TDLS is prohibited in this BSS - " |
| 2859 | "reject request to start setup"); |
| 2860 | return -1; |
| 2861 | } |
| 2862 | |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 2863 | peer = wpa_tdls_add_peer(sm, addr, NULL); |
| 2864 | if (peer == NULL) |
| 2865 | return -1; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2866 | |
Sunil Dutt | 73b28cc | 2013-09-30 17:38:41 +0300 | [diff] [blame] | 2867 | if (peer->tpk_in_progress) { |
| 2868 | wpa_printf(MSG_DEBUG, "TDLS: Setup is already in progress with the peer"); |
| 2869 | return 0; |
| 2870 | } |
| 2871 | |
Sunil Ravi | 99c035e | 2024-07-12 01:42:03 +0000 | [diff] [blame^] | 2872 | if (sm->mlo.valid_links && !peer->disc_resp_rcvd) { |
| 2873 | wpa_printf(MSG_DEBUG, |
| 2874 | "TDLS: MLO STA connection - defer the setup request since Discovery Resp not yet received"); |
| 2875 | peer->setup_req_rcvd = true; |
| 2876 | return 0; |
| 2877 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2878 | peer->initiator = 1; |
| 2879 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2880 | /* add the peer to the driver as a "setup in progress" peer */ |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2881 | if (wpa_sm_tdls_peer_addset(sm, peer->addr, 1, 0, 0, NULL, 0, NULL, |
Hai Shalom | a20dcd7 | 2022-02-04 13:43:00 -0800 | [diff] [blame] | 2882 | NULL, NULL, 0, NULL, 0, 0, NULL, 0, NULL, 0, |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 2883 | NULL, 0, NULL, 0, peer->mld_link_id)) { |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 2884 | wpa_tdls_disable_peer_link(sm, peer); |
| 2885 | return -1; |
| 2886 | } |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2887 | |
Sunil Dutt | 73b28cc | 2013-09-30 17:38:41 +0300 | [diff] [blame] | 2888 | peer->tpk_in_progress = 1; |
| 2889 | |
Hai Shalom | 6084025 | 2021-02-19 19:02:11 -0800 | [diff] [blame] | 2890 | res = wpa_tdls_send_tpk_m1(sm, peer); |
| 2891 | if (res < 0) { |
| 2892 | if (res != -2) |
| 2893 | wpa_tdls_disable_peer_link(sm, peer); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2894 | return -1; |
| 2895 | } |
| 2896 | |
| 2897 | return 0; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2898 | } |
| 2899 | |
| 2900 | |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 2901 | void wpa_tdls_remove(struct wpa_sm *sm, const u8 *addr) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2902 | { |
| 2903 | struct wpa_tdls_peer *peer; |
| 2904 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2905 | if (sm->tdls_disabled || !sm->tdls_supported) |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 2906 | return; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2907 | |
| 2908 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 2909 | if (ether_addr_equal(peer->addr, addr)) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2910 | break; |
| 2911 | } |
| 2912 | |
| 2913 | if (peer == NULL || !peer->tpk_success) |
Dmitry Shmidt | 4b9d52f | 2013-02-05 17:44:43 -0800 | [diff] [blame] | 2914 | return; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2915 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2916 | if (sm->tdls_external_setup) { |
| 2917 | /* |
| 2918 | * Disable previous link to allow renegotiation to be completed |
| 2919 | * on AP path. |
| 2920 | */ |
Dmitry Shmidt | b58836e | 2014-04-29 14:35:56 -0700 | [diff] [blame] | 2921 | wpa_tdls_do_teardown(sm, peer, |
| 2922 | WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2923 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2924 | } |
| 2925 | |
| 2926 | |
| 2927 | /** |
| 2928 | * wpa_supplicant_rx_tdls - Receive TDLS data frame |
| 2929 | * |
| 2930 | * This function is called to receive TDLS (ethertype = 0x890d) data frames. |
| 2931 | */ |
| 2932 | static void wpa_supplicant_rx_tdls(void *ctx, const u8 *src_addr, |
| 2933 | const u8 *buf, size_t len) |
| 2934 | { |
| 2935 | struct wpa_sm *sm = ctx; |
| 2936 | struct wpa_tdls_frame *tf; |
| 2937 | |
| 2938 | wpa_hexdump(MSG_DEBUG, "TDLS: Received Data frame encapsulation", |
| 2939 | buf, len); |
| 2940 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2941 | if (sm->tdls_disabled || !sm->tdls_supported) { |
| 2942 | wpa_printf(MSG_DEBUG, "TDLS: Discard message - TDLS disabled " |
| 2943 | "or unsupported by driver"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2944 | return; |
| 2945 | } |
| 2946 | |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 2947 | if (ether_addr_equal(src_addr, sm->own_addr)) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2948 | wpa_printf(MSG_DEBUG, "TDLS: Discard copy of own message"); |
| 2949 | return; |
| 2950 | } |
| 2951 | |
| 2952 | if (len < sizeof(*tf)) { |
| 2953 | wpa_printf(MSG_INFO, "TDLS: Drop too short frame"); |
| 2954 | return; |
| 2955 | } |
| 2956 | |
| 2957 | /* Check to make sure its a valid encapsulated TDLS frame */ |
| 2958 | tf = (struct wpa_tdls_frame *) buf; |
| 2959 | if (tf->payloadtype != 2 /* TDLS_RFTYPE */ || |
| 2960 | tf->category != WLAN_ACTION_TDLS) { |
| 2961 | wpa_printf(MSG_INFO, "TDLS: Invalid frame - payloadtype=%u " |
| 2962 | "category=%u action=%u", |
| 2963 | tf->payloadtype, tf->category, tf->action); |
| 2964 | return; |
| 2965 | } |
| 2966 | |
| 2967 | switch (tf->action) { |
| 2968 | case WLAN_TDLS_SETUP_REQUEST: |
| 2969 | wpa_tdls_process_tpk_m1(sm, src_addr, buf, len); |
| 2970 | break; |
| 2971 | case WLAN_TDLS_SETUP_RESPONSE: |
| 2972 | wpa_tdls_process_tpk_m2(sm, src_addr, buf, len); |
| 2973 | break; |
| 2974 | case WLAN_TDLS_SETUP_CONFIRM: |
| 2975 | wpa_tdls_process_tpk_m3(sm, src_addr, buf, len); |
| 2976 | break; |
| 2977 | case WLAN_TDLS_TEARDOWN: |
| 2978 | wpa_tdls_recv_teardown(sm, src_addr, buf, len); |
| 2979 | break; |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 2980 | case WLAN_TDLS_DISCOVERY_REQUEST: |
| 2981 | wpa_tdls_process_discovery_request(sm, src_addr, buf, len); |
| 2982 | break; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 2983 | default: |
| 2984 | /* Kernel code will process remaining frames */ |
| 2985 | wpa_printf(MSG_DEBUG, "TDLS: Ignore TDLS frame action code %u", |
| 2986 | tf->action); |
| 2987 | break; |
| 2988 | } |
| 2989 | } |
| 2990 | |
| 2991 | |
| 2992 | /** |
| 2993 | * wpa_tdls_init - Initialize driver interface parameters for TDLS |
| 2994 | * @wpa_s: Pointer to wpa_supplicant data |
| 2995 | * Returns: 0 on success, -1 on failure |
| 2996 | * |
| 2997 | * This function is called to initialize driver interface parameters for TDLS. |
| 2998 | * wpa_drv_init() must have been called before this function to initialize the |
| 2999 | * driver interface. |
| 3000 | */ |
| 3001 | int wpa_tdls_init(struct wpa_sm *sm) |
| 3002 | { |
| 3003 | if (sm == NULL) |
| 3004 | return -1; |
| 3005 | |
Hai Shalom | 899fcc7 | 2020-10-19 14:38:18 -0700 | [diff] [blame] | 3006 | if (sm->l2_tdls) { |
| 3007 | l2_packet_deinit(sm->l2_tdls); |
| 3008 | sm->l2_tdls = NULL; |
| 3009 | } |
| 3010 | |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 3011 | sm->l2_tdls = l2_packet_init(sm->bridge_ifname ? sm->bridge_ifname : |
| 3012 | sm->ifname, |
| 3013 | sm->own_addr, |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3014 | ETH_P_80211_ENCAP, wpa_supplicant_rx_tdls, |
| 3015 | sm, 0); |
| 3016 | if (sm->l2_tdls == NULL) { |
| 3017 | wpa_printf(MSG_ERROR, "TDLS: Failed to open l2_packet " |
| 3018 | "connection"); |
| 3019 | return -1; |
| 3020 | } |
| 3021 | |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 3022 | /* |
| 3023 | * Drivers that support TDLS but don't implement the get_capa callback |
| 3024 | * are assumed to perform everything internally |
| 3025 | */ |
| 3026 | if (wpa_sm_tdls_get_capa(sm, &sm->tdls_supported, |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3027 | &sm->tdls_external_setup, |
| 3028 | &sm->tdls_chan_switch) < 0) { |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 3029 | sm->tdls_supported = 1; |
| 3030 | sm->tdls_external_setup = 0; |
| 3031 | } |
| 3032 | |
| 3033 | wpa_printf(MSG_DEBUG, "TDLS: TDLS operation%s supported by " |
| 3034 | "driver", sm->tdls_supported ? "" : " not"); |
| 3035 | wpa_printf(MSG_DEBUG, "TDLS: Driver uses %s link setup", |
| 3036 | sm->tdls_external_setup ? "external" : "internal"); |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3037 | wpa_printf(MSG_DEBUG, "TDLS: Driver %s TDLS channel switching", |
| 3038 | sm->tdls_chan_switch ? "supports" : "does not support"); |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 3039 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3040 | return 0; |
| 3041 | } |
| 3042 | |
| 3043 | |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 3044 | void wpa_tdls_teardown_peers(struct wpa_sm *sm) |
| 3045 | { |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 3046 | struct wpa_tdls_peer *peer, *tmp; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 3047 | |
Dmitry Shmidt | ff787d5 | 2015-01-12 13:01:47 -0800 | [diff] [blame] | 3048 | if (!sm) |
| 3049 | return; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 3050 | peer = sm->tdls; |
| 3051 | |
| 3052 | wpa_printf(MSG_DEBUG, "TDLS: Tear down peers"); |
| 3053 | |
| 3054 | while (peer) { |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 3055 | tmp = peer->next; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 3056 | wpa_printf(MSG_DEBUG, "TDLS: Tear down peer " MACSTR, |
| 3057 | MAC2STR(peer->addr)); |
| 3058 | if (sm->tdls_external_setup) |
Dmitry Shmidt | b58836e | 2014-04-29 14:35:56 -0700 | [diff] [blame] | 3059 | wpa_tdls_do_teardown(sm, peer, |
| 3060 | WLAN_REASON_DEAUTH_LEAVING); |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 3061 | else |
| 3062 | wpa_sm_tdls_oper(sm, TDLS_TEARDOWN, peer->addr); |
| 3063 | |
Dmitry Shmidt | d30ac60 | 2014-06-30 09:54:22 -0700 | [diff] [blame] | 3064 | peer = tmp; |
Dmitry Shmidt | f862328 | 2013-02-20 14:34:59 -0800 | [diff] [blame] | 3065 | } |
| 3066 | } |
| 3067 | |
| 3068 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3069 | static void wpa_tdls_remove_peers(struct wpa_sm *sm) |
| 3070 | { |
| 3071 | struct wpa_tdls_peer *peer, *tmp; |
| 3072 | |
| 3073 | peer = sm->tdls; |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3074 | |
| 3075 | while (peer) { |
| 3076 | int res; |
| 3077 | tmp = peer->next; |
| 3078 | res = wpa_sm_tdls_oper(sm, TDLS_DISABLE_LINK, peer->addr); |
| 3079 | wpa_printf(MSG_DEBUG, "TDLS: Remove peer " MACSTR " (res=%d)", |
| 3080 | MAC2STR(peer->addr), res); |
| 3081 | wpa_tdls_peer_free(sm, peer); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3082 | peer = tmp; |
| 3083 | } |
| 3084 | } |
| 3085 | |
| 3086 | |
| 3087 | /** |
| 3088 | * wpa_tdls_deinit - Deinitialize driver interface parameters for TDLS |
| 3089 | * |
| 3090 | * This function is called to recover driver interface parameters for TDLS |
| 3091 | * and frees resources allocated for it. |
| 3092 | */ |
| 3093 | void wpa_tdls_deinit(struct wpa_sm *sm) |
| 3094 | { |
| 3095 | if (sm == NULL) |
| 3096 | return; |
| 3097 | |
| 3098 | if (sm->l2_tdls) |
| 3099 | l2_packet_deinit(sm->l2_tdls); |
| 3100 | sm->l2_tdls = NULL; |
| 3101 | |
| 3102 | wpa_tdls_remove_peers(sm); |
| 3103 | } |
| 3104 | |
| 3105 | |
| 3106 | void wpa_tdls_assoc(struct wpa_sm *sm) |
| 3107 | { |
| 3108 | wpa_printf(MSG_DEBUG, "TDLS: Remove peers on association"); |
| 3109 | wpa_tdls_remove_peers(sm); |
| 3110 | } |
| 3111 | |
| 3112 | |
| 3113 | void wpa_tdls_disassoc(struct wpa_sm *sm) |
| 3114 | { |
| 3115 | wpa_printf(MSG_DEBUG, "TDLS: Remove peers on disassociation"); |
| 3116 | wpa_tdls_remove_peers(sm); |
| 3117 | } |
| 3118 | |
| 3119 | |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 3120 | static int wpa_tdls_prohibited(struct ieee802_11_elems *elems) |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3121 | { |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3122 | /* bit 38 - TDLS Prohibited */ |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 3123 | return !!(elems->ext_capab[4] & 0x40); |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3124 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3125 | |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3126 | |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 3127 | static int wpa_tdls_chan_switch_prohibited(struct ieee802_11_elems *elems) |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3128 | { |
| 3129 | /* bit 39 - TDLS Channel Switch Prohibited */ |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 3130 | return !!(elems->ext_capab[4] & 0x80); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3131 | } |
| 3132 | |
| 3133 | |
| 3134 | void wpa_tdls_ap_ies(struct wpa_sm *sm, const u8 *ies, size_t len) |
| 3135 | { |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 3136 | struct ieee802_11_elems elems; |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3137 | |
| 3138 | sm->tdls_prohibited = 0; |
| 3139 | sm->tdls_chan_switch_prohibited = 0; |
| 3140 | |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 3141 | if (ies == NULL || |
| 3142 | ieee802_11_parse_elems(ies, len, &elems, 0) == ParseFailed || |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 3143 | elems.ext_capab == NULL || elems.ext_capab_len < 5) |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3144 | return; |
| 3145 | |
| 3146 | sm->tdls_prohibited = wpa_tdls_prohibited(&elems); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3147 | wpa_printf(MSG_DEBUG, "TDLS: TDLS is %s in the target BSS", |
| 3148 | sm->tdls_prohibited ? "prohibited" : "allowed"); |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3149 | sm->tdls_chan_switch_prohibited = |
| 3150 | wpa_tdls_chan_switch_prohibited(&elems); |
| 3151 | wpa_printf(MSG_DEBUG, "TDLS: TDLS channel switch %s in the target BSS", |
| 3152 | sm->tdls_chan_switch_prohibited ? "prohibited" : "allowed"); |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3153 | } |
| 3154 | |
| 3155 | |
| 3156 | void wpa_tdls_assoc_resp_ies(struct wpa_sm *sm, const u8 *ies, size_t len) |
| 3157 | { |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 3158 | struct ieee802_11_elems elems; |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3159 | |
Dmitry Shmidt | d80a401 | 2015-11-05 16:35:40 -0800 | [diff] [blame] | 3160 | if (ies == NULL || |
| 3161 | ieee802_11_parse_elems(ies, len, &elems, 0) == ParseFailed || |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 3162 | elems.ext_capab == NULL || elems.ext_capab_len < 5) |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3163 | return; |
| 3164 | |
| 3165 | if (!sm->tdls_prohibited && wpa_tdls_prohibited(&elems)) { |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3166 | wpa_printf(MSG_DEBUG, "TDLS: TDLS prohibited based on " |
| 3167 | "(Re)Association Response IEs"); |
| 3168 | sm->tdls_prohibited = 1; |
| 3169 | } |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3170 | |
| 3171 | if (!sm->tdls_chan_switch_prohibited && |
| 3172 | wpa_tdls_chan_switch_prohibited(&elems)) { |
| 3173 | wpa_printf(MSG_DEBUG, |
| 3174 | "TDLS: TDLS channel switch prohibited based on (Re)Association Response IEs"); |
| 3175 | sm->tdls_chan_switch_prohibited = 1; |
| 3176 | } |
Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 3177 | } |
| 3178 | |
| 3179 | |
| 3180 | void wpa_tdls_enable(struct wpa_sm *sm, int enabled) |
| 3181 | { |
| 3182 | wpa_printf(MSG_DEBUG, "TDLS: %s", enabled ? "enabled" : "disabled"); |
| 3183 | sm->tdls_disabled = !enabled; |
| 3184 | } |
Dmitry Shmidt | 1f69aa5 | 2012-01-24 16:10:04 -0800 | [diff] [blame] | 3185 | |
| 3186 | |
| 3187 | int wpa_tdls_is_external_setup(struct wpa_sm *sm) |
| 3188 | { |
| 3189 | return sm->tdls_external_setup; |
| 3190 | } |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3191 | |
| 3192 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 3193 | int wpa_tdls_process_discovery_response(struct wpa_sm *sm, const u8 *addr, |
| 3194 | const u8 *buf, size_t len) |
| 3195 | { |
| 3196 | struct ieee802_11_elems elems; |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 3197 | const struct wpa_tdls_lnkid *lnkid; |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 3198 | struct wpa_tdls_peer *peer; |
| 3199 | size_t min_req_len = 1 /* Dialog Token */ + 2 /* Capability */ + |
| 3200 | sizeof(struct wpa_tdls_lnkid); |
| 3201 | int link_id = -1; |
| 3202 | |
| 3203 | wpa_printf(MSG_DEBUG, "TDLS: Process Discovery Response from " MACSTR, |
| 3204 | MAC2STR(addr)); |
| 3205 | |
| 3206 | if (len < min_req_len) { |
| 3207 | wpa_printf(MSG_DEBUG, "TDLS Discovery Resp is too short: %zu", |
| 3208 | len); |
| 3209 | return -1; |
| 3210 | } |
| 3211 | |
| 3212 | /* Elements start after the three octets of fixed field (one octet for |
| 3213 | * the Dialog Token field and two octets for the Capability field. */ |
| 3214 | if (ieee802_11_parse_elems(buf + 3, len - 3, &elems, 1) == |
| 3215 | ParseFailed) { |
| 3216 | wpa_printf(MSG_DEBUG, |
| 3217 | "TDLS: Failed to parse IEs in Discovery Response"); |
| 3218 | return -1; |
| 3219 | } |
| 3220 | |
| 3221 | if (!elems.link_id) { |
| 3222 | wpa_printf(MSG_DEBUG, |
| 3223 | "TDLS: Link Identifier element not found in Discovery Response"); |
| 3224 | return -1; |
| 3225 | } |
| 3226 | |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 3227 | lnkid = (const struct wpa_tdls_lnkid *) (elems.link_id - 2); |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 3228 | |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 3229 | if (!wpa_tdls_is_lnkid_bss_valid(sm, lnkid, &link_id)) { |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 3230 | wpa_printf(MSG_DEBUG, |
| 3231 | "TDLS: Discovery Response from different BSS " |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 3232 | MACSTR, MAC2STR(lnkid->bssid)); |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 3233 | return -1; |
| 3234 | } |
| 3235 | |
| 3236 | peer = wpa_tdls_add_peer(sm, addr, NULL); |
| 3237 | if (!peer) { |
| 3238 | wpa_printf(MSG_DEBUG, "TDLS: Could not add peer entry"); |
| 3239 | return -1; |
| 3240 | } |
| 3241 | |
| 3242 | peer->mld_link_id = link_id; |
| 3243 | wpa_printf(MSG_DEBUG, "TDLS: Link identifier BSS: " MACSTR |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 3244 | " , link id: %u", MAC2STR(lnkid->bssid), link_id); |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 3245 | |
Sunil Ravi | 99c035e | 2024-07-12 01:42:03 +0000 | [diff] [blame^] | 3246 | peer->disc_resp_rcvd = true; |
| 3247 | if (peer->setup_req_rcvd) { |
| 3248 | peer->setup_req_rcvd = false; |
| 3249 | wpa_printf(MSG_DEBUG, "TDLS: Process the deferred TDLS start"); |
| 3250 | return wpa_tdls_start(sm, addr); |
| 3251 | } |
| 3252 | |
Sunil Ravi | 2a14cf1 | 2023-11-21 00:54:38 +0000 | [diff] [blame] | 3253 | return 0; |
| 3254 | } |
| 3255 | |
| 3256 | |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3257 | int wpa_tdls_enable_chan_switch(struct wpa_sm *sm, const u8 *addr, |
| 3258 | u8 oper_class, |
| 3259 | struct hostapd_freq_params *freq_params) |
| 3260 | { |
| 3261 | struct wpa_tdls_peer *peer; |
| 3262 | int ret; |
| 3263 | |
| 3264 | if (sm->tdls_disabled || !sm->tdls_supported) |
| 3265 | return -1; |
| 3266 | |
| 3267 | if (!sm->tdls_chan_switch) { |
| 3268 | wpa_printf(MSG_DEBUG, |
| 3269 | "TDLS: Channel switching not supported by the driver"); |
| 3270 | return -1; |
| 3271 | } |
| 3272 | |
| 3273 | if (sm->tdls_chan_switch_prohibited) { |
| 3274 | wpa_printf(MSG_DEBUG, |
| 3275 | "TDLS: Channel switching is prohibited in this BSS - reject request to switch channel"); |
| 3276 | return -1; |
| 3277 | } |
| 3278 | |
| 3279 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 3280 | if (ether_addr_equal(peer->addr, addr)) |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3281 | break; |
| 3282 | } |
| 3283 | |
| 3284 | if (peer == NULL || !peer->tpk_success) { |
| 3285 | wpa_printf(MSG_ERROR, "TDLS: Peer " MACSTR |
| 3286 | " not found for channel switching", MAC2STR(addr)); |
| 3287 | return -1; |
| 3288 | } |
| 3289 | |
| 3290 | if (peer->chan_switch_enabled) { |
| 3291 | wpa_printf(MSG_DEBUG, "TDLS: Peer " MACSTR |
| 3292 | " already has channel switching enabled", |
| 3293 | MAC2STR(addr)); |
| 3294 | return 0; |
| 3295 | } |
| 3296 | |
| 3297 | ret = wpa_sm_tdls_enable_channel_switch(sm, peer->addr, |
| 3298 | oper_class, freq_params); |
| 3299 | if (!ret) |
| 3300 | peer->chan_switch_enabled = 1; |
| 3301 | |
| 3302 | return ret; |
| 3303 | } |
| 3304 | |
| 3305 | |
| 3306 | int wpa_tdls_disable_chan_switch(struct wpa_sm *sm, const u8 *addr) |
| 3307 | { |
| 3308 | struct wpa_tdls_peer *peer; |
| 3309 | |
| 3310 | if (sm->tdls_disabled || !sm->tdls_supported) |
| 3311 | return -1; |
| 3312 | |
| 3313 | for (peer = sm->tdls; peer; peer = peer->next) { |
Sunil Ravi | b0ac25f | 2024-07-12 01:42:03 +0000 | [diff] [blame] | 3314 | if (ether_addr_equal(peer->addr, addr)) |
Dmitry Shmidt | 6c0da2b | 2015-01-05 13:08:17 -0800 | [diff] [blame] | 3315 | break; |
| 3316 | } |
| 3317 | |
| 3318 | if (!peer || !peer->chan_switch_enabled) { |
| 3319 | wpa_printf(MSG_ERROR, "TDLS: Channel switching not enabled for " |
| 3320 | MACSTR, MAC2STR(addr)); |
| 3321 | return -1; |
| 3322 | } |
| 3323 | |
| 3324 | /* ignore the return value */ |
| 3325 | wpa_sm_tdls_disable_channel_switch(sm, peer->addr); |
| 3326 | |
| 3327 | peer->chan_switch_enabled = 0; |
| 3328 | return 0; |
| 3329 | } |