/* * wpa_supplicant - SME * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi> * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "includes.h" #include "common.h" #include "utils/eloop.h" #include "common/ieee802_11_defs.h" #include "common/ieee802_11_common.h" #include "eapol_supp/eapol_supp_sm.h" #include "common/wpa_common.h" #include "common/sae.h" #include "rsn_supp/wpa.h" #include "rsn_supp/pmksa_cache.h" #include "config.h" #include "wpa_supplicant_i.h" #include "driver_i.h" #include "wpas_glue.h" #include "wps_supplicant.h" #include "p2p_supplicant.h" #include "notify.h" #include "bss.h" #include "scan.h" #include "sme.h" #include "hs20_supplicant.h" #define SME_AUTH_TIMEOUT 5 #define SME_ASSOC_TIMEOUT 5 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx); static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx); static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx); #ifdef CONFIG_IEEE80211W static void sme_stop_sa_query(struct wpa_supplicant *wpa_s); #endif /* CONFIG_IEEE80211W */ #ifdef CONFIG_SAE static int index_within_array(const int *array, int idx) { int i; for (i = 0; i < idx; i++) { if (array[i] <= 0) return 0; } return 1; } static int sme_set_sae_group(struct wpa_supplicant *wpa_s) { int *groups = wpa_s->conf->sae_groups; int default_groups[] = { 19, 20, 21, 25, 26, 0 }; if (!groups || groups[0] <= 0) groups = default_groups; /* Configuration may have changed, so validate current index */ if (!index_within_array(groups, wpa_s->sme.sae_group_index)) return -1; for (;;) { int group = groups[wpa_s->sme.sae_group_index]; if (group <= 0) break; if (sae_set_group(&wpa_s->sme.sae, group) == 0) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d", wpa_s->sme.sae.group); return 0; } wpa_s->sme.sae_group_index++; } return -1; } static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, const u8 *bssid) { struct wpabuf *buf; size_t len; if (ssid->passphrase == NULL) { wpa_printf(MSG_DEBUG, "SAE: No password available"); return NULL; } if (sme_set_sae_group(wpa_s) < 0) { wpa_printf(MSG_DEBUG, "SAE: Failed to select group"); return NULL; } if (sae_prepare_commit(wpa_s->own_addr, bssid, (u8 *) ssid->passphrase, os_strlen(ssid->passphrase), &wpa_s->sme.sae) < 0) { wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); return NULL; } len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0; buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len); if (buf == NULL) return NULL; wpabuf_put_le16(buf, 1); /* Transaction seq# */ wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token); return buf; } static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s) { struct wpabuf *buf; buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN); if (buf == NULL) return NULL; wpabuf_put_le16(buf, 2); /* Transaction seq# */ wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); sae_write_confirm(&wpa_s->sme.sae, buf); return buf; } #endif /* CONFIG_SAE */ /** * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt * @wpa_s: Pointer to wpa_supplicant data * @bss: Pointer to the bss which is the target of authentication attempt */ static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { const u8 rrm_ie_len = 5; u8 *pos; const u8 *rrm_ie; wpa_s->rrm.rrm_used = 0; wpa_printf(MSG_DEBUG, "RRM: Determining whether RRM can be used - device support: 0x%x", wpa_s->drv_rrm_flags); rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES); if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) { wpa_printf(MSG_DEBUG, "RRM: No RRM in network"); return; } if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) || !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) { wpa_printf(MSG_DEBUG, "RRM: Insufficient RRM support in driver - do not use RRM"); return; } if (sizeof(wpa_s->sme.assoc_req_ie) < wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) { wpa_printf(MSG_INFO, "RRM: Unable to use RRM, no room for RRM IE"); return; } wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request"); pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; os_memset(pos, 0, 2 + rrm_ie_len); *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES; *pos++ = rrm_ie_len; /* Set supported capabilites flags */ if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION) *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT; wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2; wpa_s->rrm.rrm_used = 1; } static void sme_send_authentication(struct wpa_supplicant *wpa_s, struct wpa_bss *bss, struct wpa_ssid *ssid, int start) { struct wpa_driver_auth_params params; struct wpa_ssid *old_ssid; #ifdef CONFIG_IEEE80211R const u8 *ie; #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IEEE80211R const u8 *md = NULL; #endif /* CONFIG_IEEE80211R */ int i, bssid_changed; struct wpabuf *resp = NULL; u8 ext_capab[18]; int ext_capab_len; int skip_auth; #ifdef CONFIG_MBO const u8 *mbo; #endif /* CONFIG_MBO */ if (bss == NULL) { wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for " "the network"); wpas_connect_work_done(wpa_s); return; } skip_auth = wpa_s->conf->reassoc_same_bss_optim && wpa_s->reassoc_same_bss; wpa_s->current_bss = bss; os_memset(¶ms, 0, sizeof(params)); wpa_s->reassociate = 0; params.freq = bss->freq; params.bssid = bss->bssid; params.ssid = bss->ssid; params.ssid_len = bss->ssid_len; params.p2p = ssid->p2p_group; if (wpa_s->sme.ssid_len != params.ssid_len || os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0) wpa_s->sme.prev_bssid_set = 0; wpa_s->sme.freq = params.freq; os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len); wpa_s->sme.ssid_len = params.ssid_len; params.auth_alg = WPA_AUTH_ALG_OPEN; #ifdef IEEE8021X_EAPOL if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) { if (ssid->leap) { if (ssid->non_leap == 0) params.auth_alg = WPA_AUTH_ALG_LEAP; else params.auth_alg |= WPA_AUTH_ALG_LEAP; } } #endif /* IEEE8021X_EAPOL */ wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", params.auth_alg); if (ssid->auth_alg) { params.auth_alg = ssid->auth_alg; wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: " "0x%x", params.auth_alg); } #ifdef CONFIG_SAE wpa_s->sme.sae_pmksa_caching = 0; if (wpa_key_mgmt_sae(ssid->key_mgmt)) { const u8 *rsn; struct wpa_ie_data ied; rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); if (!rsn) { wpa_dbg(wpa_s, MSG_DEBUG, "SAE enabled, but target BSS does not advertise RSN"); } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 && wpa_key_mgmt_sae(ied.key_mgmt)) { wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg"); params.auth_alg = WPA_AUTH_ALG_SAE; } else { wpa_dbg(wpa_s, MSG_DEBUG, "SAE enabled, but target BSS does not advertise SAE AKM for RSN"); } } #endif /* CONFIG_SAE */ for (i = 0; i < NUM_WEP_KEYS; i++) { if (ssid->wep_key_len[i]) params.wep_key[i] = ssid->wep_key[i]; params.wep_key_len[i] = ssid->wep_key_len[i]; } params.wep_tx_keyidx = ssid->wep_tx_keyidx; bssid_changed = !is_zero_ether_addr(wpa_s->bssid); os_memset(wpa_s->bssid, 0, ETH_ALEN); os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN); if (bssid_changed) wpas_notify_bssid_changed(wpa_s); if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) || wpa_bss_get_ie(bss, WLAN_EID_RSN)) && wpa_key_mgmt_wpa(ssid->key_mgmt)) { int try_opportunistic; try_opportunistic = (ssid->proactive_key_caching < 0 ? wpa_s->conf->okc : ssid->proactive_key_caching) && (ssid->proto & WPA_PROTO_RSN); if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, wpa_s->current_ssid, try_opportunistic) == 0) eapol_sm_notify_pmkid_attempt(wpa_s->eapol); wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); if (wpa_supplicant_set_suites(wpa_s, bss, ssid, wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len)) { wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " "key management and encryption suites"); wpas_connect_work_done(wpa_s); return; } } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) { /* * Both WPA and non-WPA IEEE 802.1X enabled in configuration - * use non-WPA since the scan results did not indicate that the * AP is using WPA or WPA2. */ wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); wpa_s->sme.assoc_req_ie_len = 0; } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie); if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len)) { wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA " "key management and encryption suites (no " "scan results)"); wpas_connect_work_done(wpa_s); return; } #ifdef CONFIG_WPS } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { struct wpabuf *wps_ie; wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_s->sme.assoc_req_ie)) { wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie); os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie), wpa_s->sme.assoc_req_ie_len); } else wpa_s->sme.assoc_req_ie_len = 0; wpabuf_free(wps_ie); wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); #endif /* CONFIG_WPS */ } else { wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); wpa_s->sme.assoc_req_ie_len = 0; } #ifdef CONFIG_IEEE80211R ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) md = ie + 2; wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); if (md) { /* Prepare for the next transition */ wpa_ft_prepare_auth_request(wpa_s->wpa, ie); } if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) { if (wpa_s->sme.assoc_req_ie_len + 5 < sizeof(wpa_s->sme.assoc_req_ie)) { struct rsn_mdie *mdie; u8 *pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; *pos++ = WLAN_EID_MOBILITY_DOMAIN; *pos++ = sizeof(*mdie); mdie = (struct rsn_mdie *) pos; os_memcpy(mdie->mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN]; wpa_s->sme.assoc_req_ie_len += 5; } if (wpa_s->sme.ft_used && os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 && wpa_sm_has_ptk(wpa_s->wpa)) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT " "over-the-air"); params.auth_alg = WPA_AUTH_ALG_FT; params.ie = wpa_s->sme.ft_ies; params.ie_len = wpa_s->sme.ft_ies_len; } } #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IEEE80211W wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid); if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) { const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); struct wpa_ie_data _ie; if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 && _ie.capabilities & (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports " "MFP: require MFP"); wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED; } } #endif /* CONFIG_IEEE80211W */ #ifdef CONFIG_P2P if (wpa_s->global->p2p) { u8 *pos; size_t len; int res; pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len; len = sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len; res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, ssid->p2p_group); if (res >= 0) wpa_s->sme.assoc_req_ie_len += res; } #endif /* CONFIG_P2P */ #ifdef CONFIG_FST if (wpa_s->fst_ies) { int fst_ies_len = wpabuf_len(wpa_s->fst_ies); if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <= sizeof(wpa_s->sme.assoc_req_ie)) { os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpabuf_head(wpa_s->fst_ies), fst_ies_len); wpa_s->sme.assoc_req_ie_len += fst_ies_len; } } #endif /* CONFIG_FST */ sme_auth_handle_rrm(wpa_s, bss); #ifdef CONFIG_MBO mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE); if (mbo) { int len; len = wpas_mbo_supp_op_class_ie( wpa_s, bss->freq, wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len); if (len > 0) wpa_s->sme.assoc_req_ie_len += len; } #endif /* CONFIG_MBO */ ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab, sizeof(ext_capab)); if (ext_capab_len > 0) { u8 *pos = wpa_s->sme.assoc_req_ie; if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN) pos += 2 + pos[1]; os_memmove(pos + ext_capab_len, pos, wpa_s->sme.assoc_req_ie_len - (pos - wpa_s->sme.assoc_req_ie)); wpa_s->sme.assoc_req_ie_len += ext_capab_len; os_memcpy(pos, ext_capab, ext_capab_len); } #ifdef CONFIG_HS20 if (is_hs20_network(wpa_s, ssid, bss)) { struct wpabuf *hs20; hs20 = wpabuf_alloc(20); if (hs20) { int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid); size_t len; wpas_hs20_add_indication(hs20, pps_mo_id); len = sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len; if (wpabuf_len(hs20) <= len) { os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpabuf_head(hs20), wpabuf_len(hs20)); wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20); } wpabuf_free(hs20); } } #endif /* CONFIG_HS20 */ if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) { struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]; size_t len; len = sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len; if (wpabuf_len(buf) <= len) { os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpabuf_head(buf), wpabuf_len(buf)); wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf); } } #ifdef CONFIG_MBO if (mbo) { int len; len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len); if (len >= 0) wpa_s->sme.assoc_req_ie_len += len; } #endif /* CONFIG_MBO */ #ifdef CONFIG_SAE if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE && pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0) { wpa_dbg(wpa_s, MSG_DEBUG, "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication"); params.auth_alg = WPA_AUTH_ALG_OPEN; wpa_s->sme.sae_pmksa_caching = 1; } if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) { if (start) resp = sme_auth_build_sae_commit(wpa_s, ssid, bss->bssid); else resp = sme_auth_build_sae_confirm(wpa_s); if (resp == NULL) { wpas_connection_failed(wpa_s, bss->bssid); return; } params.sae_data = wpabuf_head(resp); params.sae_data_len = wpabuf_len(resp); wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED; } #endif /* CONFIG_SAE */ wpa_supplicant_cancel_sched_scan(wpa_s); wpa_supplicant_cancel_scan(wpa_s); wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), wpa_ssid_txt(params.ssid, params.ssid_len), params.freq); wpa_clear_keys(wpa_s, bss->bssid); wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); old_ssid = wpa_s->current_ssid; wpa_s->current_ssid = ssid; wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); wpa_supplicant_initiate_eapol(wpa_s); if (old_ssid != wpa_s->current_ssid) wpas_notify_network_changed(wpa_s); #ifdef CONFIG_P2P /* * If multi-channel concurrency is not supported, check for any * frequency conflict. In case of any frequency conflict, remove the * least prioritized connection. */ if (wpa_s->num_multichan_concurrent < 2) { int freq, num; num = get_shared_radio_freqs(wpa_s, &freq, 1); if (num > 0 && freq > 0 && freq != params.freq) { wpa_printf(MSG_DEBUG, "Conflicting frequency found (%d != %d)", freq, params.freq); if (wpas_p2p_handle_frequency_conflicts(wpa_s, params.freq, ssid) < 0) { wpas_connection_failed(wpa_s, bss->bssid); wpa_supplicant_mark_disassoc(wpa_s); wpabuf_free(resp); wpas_connect_work_done(wpa_s); return; } } } #endif /* CONFIG_P2P */ if (skip_auth) { wpa_msg(wpa_s, MSG_DEBUG, "SME: Skip authentication step on reassoc-to-same-BSS"); wpabuf_free(resp); sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN); return; } wpa_s->sme.auth_alg = params.auth_alg; if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) { wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the " "driver failed"); wpas_connection_failed(wpa_s, bss->bssid); wpa_supplicant_mark_disassoc(wpa_s); wpabuf_free(resp); wpas_connect_work_done(wpa_s); return; } eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, NULL); /* * Association will be started based on the authentication event from * the driver. */ wpabuf_free(resp); } static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit) { struct wpa_connect_work *cwork = work->ctx; struct wpa_supplicant *wpa_s = work->wpa_s; if (deinit) { if (work->started) wpa_s->connect_work = NULL; wpas_connect_work_free(cwork); return; } wpa_s->connect_work = work; if (cwork->bss_removed || !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) || wpas_network_disabled(wpa_s, cwork->ssid)) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt"); wpas_connect_work_done(wpa_s); return; } sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1); } void sme_authenticate(struct wpa_supplicant *wpa_s, struct wpa_bss *bss, struct wpa_ssid *ssid) { struct wpa_connect_work *cwork; if (bss == NULL || ssid == NULL) return; if (wpa_s->connect_work) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist"); return; } if (radio_work_pending(wpa_s, "sme-connect")) { /* * The previous sme-connect work might no longer be valid due to * the fact that the BSS list was updated. In addition, it makes * sense to adhere to the 'newer' decision. */ wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove previous pending sme-connect"); radio_remove_works(wpa_s, "sme-connect", 0); } wpas_abort_ongoing_scan(wpa_s); cwork = os_zalloc(sizeof(*cwork)); if (cwork == NULL) return; cwork->bss = bss; cwork->ssid = ssid; cwork->sme = 1; #ifdef CONFIG_SAE wpa_s->sme.sae.state = SAE_NOTHING; wpa_s->sme.sae.send_confirm = 0; wpa_s->sme.sae_group_index = 0; #endif /* CONFIG_SAE */ if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1, sme_auth_start_cb, cwork) < 0) wpas_connect_work_free(cwork); } #ifdef CONFIG_SAE static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction, u16 status_code, const u8 *data, size_t len) { int *groups; wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u " "status code %u", auth_transaction, status_code); if (auth_transaction == 1 && status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ && wpa_s->sme.sae.state == SAE_COMMITTED && wpa_s->current_bss && wpa_s->current_ssid) { int default_groups[] = { 19, 20, 21, 25, 26, 0 }; u16 group; groups = wpa_s->conf->sae_groups; if (!groups || groups[0] <= 0) groups = default_groups; if (len < sizeof(le16)) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Too short SAE anti-clogging token request"); return -1; } group = WPA_GET_LE16(data); wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token requested (group %u)", group); if (sae_group_allowed(&wpa_s->sme.sae, groups, group) != WLAN_STATUS_SUCCESS) { wpa_dbg(wpa_s, MSG_ERROR, "SME: SAE group %u of anti-clogging request is invalid", group); return -1; } wpabuf_free(wpa_s->sme.sae_token); wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16), len - sizeof(le16)); sme_send_authentication(wpa_s, wpa_s->current_bss, wpa_s->current_ssid, 1); return 0; } if (auth_transaction == 1 && status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && wpa_s->sme.sae.state == SAE_COMMITTED && wpa_s->current_bss && wpa_s->current_ssid) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported"); wpa_s->sme.sae_group_index++; if (sme_set_sae_group(wpa_s) < 0) return -1; /* no other groups enabled */ wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group"); sme_send_authentication(wpa_s, wpa_s->current_bss, wpa_s->current_ssid, 1); return 0; } if (status_code != WLAN_STATUS_SUCCESS) return -1; if (auth_transaction == 1) { u16 res; groups = wpa_s->conf->sae_groups; wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit"); if (wpa_s->current_bss == NULL || wpa_s->current_ssid == NULL) return -1; if (wpa_s->sme.sae.state != SAE_COMMITTED) return -1; if (groups && groups[0] <= 0) groups = NULL; res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL, groups); if (res == SAE_SILENTLY_DISCARD) { wpa_printf(MSG_DEBUG, "SAE: Drop commit message due to reflection attack"); return 0; } if (res != WLAN_STATUS_SUCCESS) return -1; if (sae_process_commit(&wpa_s->sme.sae) < 0) { wpa_printf(MSG_DEBUG, "SAE: Failed to process peer " "commit"); return -1; } wpabuf_free(wpa_s->sme.sae_token); wpa_s->sme.sae_token = NULL; sme_send_authentication(wpa_s, wpa_s->current_bss, wpa_s->current_ssid, 0); return 0; } else if (auth_transaction == 2) { wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm"); if (wpa_s->sme.sae.state != SAE_CONFIRMED) return -1; if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0) return -1; wpa_s->sme.sae.state = SAE_ACCEPTED; sae_clear_temp_data(&wpa_s->sme.sae); return 1; } return -1; } #endif /* CONFIG_SAE */ void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { struct wpa_ssid *ssid = wpa_s->current_ssid; if (ssid == NULL) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " "when network is not selected"); return; } if (wpa_s->wpa_state != WPA_AUTHENTICATING) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event " "when not in authenticating state"); return; } if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with " "unexpected peer " MACSTR, MAC2STR(data->auth.peer)); return; } wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR " auth_type=%d auth_transaction=%d status_code=%d", MAC2STR(data->auth.peer), data->auth.auth_type, data->auth.auth_transaction, data->auth.status_code); wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs", data->auth.ies, data->auth.ies_len); eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); #ifdef CONFIG_SAE if (data->auth.auth_type == WLAN_AUTH_SAE) { int res; res = sme_sae_auth(wpa_s, data->auth.auth_transaction, data->auth.status_code, data->auth.ies, data->auth.ies_len); if (res < 0) { wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); } if (res != 1) return; wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for " "4-way handshake"); wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN, wpa_s->sme.sae.pmkid, wpa_s->pending_bssid); } #endif /* CONFIG_SAE */ if (data->auth.status_code != WLAN_STATUS_SUCCESS) { char *ie_txt = NULL; if (data->auth.ies && data->auth.ies_len) { size_t buflen = 2 * data->auth.ies_len + 1; ie_txt = os_malloc(buflen); if (ie_txt) { wpa_snprintf_hex(ie_txt, buflen, data->auth.ies, data->auth.ies_len); } } wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR " auth_type=%u auth_transaction=%u status_code=%u ie=%s", MAC2STR(data->auth.peer), data->auth.auth_type, data->auth.auth_transaction, data->auth.status_code, ie_txt); os_free(ie_txt); if (data->auth.status_code != WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG || wpa_s->sme.auth_alg == data->auth.auth_type || wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) { wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); return; } wpas_connect_work_done(wpa_s); switch (data->auth.auth_type) { case WLAN_AUTH_OPEN: wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED; wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth"); wpa_supplicant_associate(wpa_s, wpa_s->current_bss, wpa_s->current_ssid); return; case WLAN_AUTH_SHARED_KEY: wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP; wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth"); wpa_supplicant_associate(wpa_s, wpa_s->current_bss, wpa_s->current_ssid); return; default: return; } } #ifdef CONFIG_IEEE80211R if (data->auth.auth_type == WLAN_AUTH_FT) { if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies, data->auth.ies_len, 0, data->auth.peer, NULL, 0) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: FT Authentication response processing failed"); wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR " reason=%d locally_generated=1", MAC2STR(wpa_s->pending_bssid), WLAN_REASON_DEAUTH_LEAVING); wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_mark_disassoc(wpa_s); return; } } #endif /* CONFIG_IEEE80211R */ sme_associate(wpa_s, ssid->mode, data->auth.peer, data->auth.auth_type); } void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode, const u8 *bssid, u16 auth_type) { struct wpa_driver_associate_params params; struct ieee802_11_elems elems; #ifdef CONFIG_HT_OVERRIDES struct ieee80211_ht_capabilities htcaps; struct ieee80211_ht_capabilities htcaps_mask; #endif /* CONFIG_HT_OVERRIDES */ #ifdef CONFIG_VHT_OVERRIDES struct ieee80211_vht_capabilities vhtcaps; struct ieee80211_vht_capabilities vhtcaps_mask; #endif /* CONFIG_VHT_OVERRIDES */ os_memset(¶ms, 0, sizeof(params)); params.bssid = bssid; params.ssid = wpa_s->sme.ssid; params.ssid_len = wpa_s->sme.ssid_len; params.freq.freq = wpa_s->sme.freq; params.bg_scan_period = wpa_s->current_ssid ? wpa_s->current_ssid->bg_scan_period : -1; params.wpa_ie = wpa_s->sme.assoc_req_ie_len ? wpa_s->sme.assoc_req_ie : NULL; params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len; params.pairwise_suite = wpa_s->pairwise_cipher; params.group_suite = wpa_s->group_cipher; params.key_mgmt_suite = wpa_s->key_mgmt; params.wpa_proto = wpa_s->wpa_proto; #ifdef CONFIG_HT_OVERRIDES os_memset(&htcaps, 0, sizeof(htcaps)); os_memset(&htcaps_mask, 0, sizeof(htcaps_mask)); params.htcaps = (u8 *) &htcaps; params.htcaps_mask = (u8 *) &htcaps_mask; wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); #endif /* CONFIG_HT_OVERRIDES */ #ifdef CONFIG_VHT_OVERRIDES os_memset(&vhtcaps, 0, sizeof(vhtcaps)); os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask)); params.vhtcaps = &vhtcaps; params.vhtcaps_mask = &vhtcaps_mask; wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms); #endif /* CONFIG_VHT_OVERRIDES */ #ifdef CONFIG_IEEE80211R if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) { params.wpa_ie = wpa_s->sme.ft_ies; params.wpa_ie_len = wpa_s->sme.ft_ies_len; } #endif /* CONFIG_IEEE80211R */ params.mode = mode; params.mgmt_frame_protection = wpa_s->sme.mfp; params.rrm_used = wpa_s->rrm.rrm_used; if (wpa_s->sme.prev_bssid_set) params.prev_bssid = wpa_s->sme.prev_bssid; wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid), params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "", params.freq.freq); wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); if (params.wpa_ie == NULL || ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!"); os_memset(&elems, 0, sizeof(elems)); } if (elems.rsn_ie) { params.wpa_proto = WPA_PROTO_RSN; wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2, elems.rsn_ie_len + 2); } else if (elems.wpa_ie) { params.wpa_proto = WPA_PROTO_WPA; wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2, elems.wpa_ie_len + 2); } else if (elems.osen) { params.wpa_proto = WPA_PROTO_OSEN; wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2, elems.osen_len + 2); } else wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group) params.p2p = 1; if (wpa_s->p2pdev->set_sta_uapsd) params.uapsd = wpa_s->p2pdev->sta_uapsd; else params.uapsd = -1; if (wpa_drv_associate(wpa_s, ¶ms) < 0) { wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the " "driver failed"); wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); return; } eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s, NULL); } int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md, const u8 *ies, size_t ies_len) { if (md == NULL || ies == NULL) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain"); os_free(wpa_s->sme.ft_ies); wpa_s->sme.ft_ies = NULL; wpa_s->sme.ft_ies_len = 0; wpa_s->sme.ft_used = 0; return 0; } os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN); wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len); os_free(wpa_s->sme.ft_ies); wpa_s->sme.ft_ies = os_malloc(ies_len); if (wpa_s->sme.ft_ies == NULL) return -1; os_memcpy(wpa_s->sme.ft_ies, ies, ies_len); wpa_s->sme.ft_ies_len = ies_len; return 0; } static void sme_deauth(struct wpa_supplicant *wpa_s) { int bssid_changed; bssid_changed = !is_zero_ether_addr(wpa_s->bssid); if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, WLAN_REASON_DEAUTH_LEAVING) < 0) { wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver " "failed"); } wpa_s->sme.prev_bssid_set = 0; wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); os_memset(wpa_s->bssid, 0, ETH_ALEN); os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); if (bssid_changed) wpas_notify_bssid_changed(wpa_s); } void sme_event_assoc_reject(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: " "status code %d", MAC2STR(wpa_s->pending_bssid), data->assoc_reject.status_code); eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); #ifdef CONFIG_SAE if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid && wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) { wpa_dbg(wpa_s, MSG_DEBUG, "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication"); wpa_sm_aborted_cached(wpa_s->wpa); wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid); if (wpa_s->current_bss) { struct wpa_bss *bss = wpa_s->current_bss; struct wpa_ssid *ssid = wpa_s->current_ssid; wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid, WLAN_REASON_DEAUTH_LEAVING); wpas_connect_work_done(wpa_s); wpa_supplicant_mark_disassoc(wpa_s); wpa_supplicant_connect(wpa_s, bss, ssid); return; } } #endif /* CONFIG_SAE */ /* * For now, unconditionally terminate the previous authentication. In * theory, this should not be needed, but mac80211 gets quite confused * if the authentication is left pending.. Some roaming cases might * benefit from using the previous authentication, so this could be * optimized in the future. */ sme_deauth(wpa_s); } void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out"); wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_mark_disassoc(wpa_s); } void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out"); wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_mark_disassoc(wpa_s); } void sme_event_disassoc(struct wpa_supplicant *wpa_s, struct disassoc_info *info) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received"); if (wpa_s->sme.prev_bssid_set) { /* * cfg80211/mac80211 can get into somewhat confused state if * the AP only disassociates us and leaves us in authenticated * state. For now, force the state to be cleared to avoid * confusing errors if we try to associate with the AP again. */ wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear " "driver state"); wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid, WLAN_REASON_DEAUTH_LEAVING); } } static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (wpa_s->wpa_state == WPA_AUTHENTICATING) { wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout"); sme_deauth(wpa_s); } } static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (wpa_s->wpa_state == WPA_ASSOCIATING) { wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout"); sme_deauth(wpa_s); } } void sme_state_changed(struct wpa_supplicant *wpa_s) { /* Make sure timers are cleaned up appropriately. */ if (wpa_s->wpa_state != WPA_ASSOCIATING) eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); if (wpa_s->wpa_state != WPA_AUTHENTICATING) eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); } void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s, const u8 *prev_pending_bssid) { /* * mac80211-workaround to force deauth on failed auth cmd, * requires us to remain in authenticating state to allow the * second authentication attempt to be continued properly. */ wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication " "to proceed after disconnection event"); wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN); /* * Re-arm authentication timer in case auth fails for whatever reason. */ eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s, NULL); } void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s) { wpa_s->sme.prev_bssid_set = 0; #ifdef CONFIG_SAE wpabuf_free(wpa_s->sme.sae_token); wpa_s->sme.sae_token = NULL; sae_clear_data(&wpa_s->sme.sae); #endif /* CONFIG_SAE */ #ifdef CONFIG_IEEE80211R if (wpa_s->sme.ft_ies) sme_update_ft_ies(wpa_s, NULL, NULL, 0); #endif /* CONFIG_IEEE80211R */ } void sme_deinit(struct wpa_supplicant *wpa_s) { os_free(wpa_s->sme.ft_ies); wpa_s->sme.ft_ies = NULL; wpa_s->sme.ft_ies_len = 0; #ifdef CONFIG_IEEE80211W sme_stop_sa_query(wpa_s); #endif /* CONFIG_IEEE80211W */ sme_clear_on_disassoc(wpa_s); eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL); eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL); eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); } static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s, const u8 *chan_list, u8 num_channels, u8 num_intol) { struct ieee80211_2040_bss_coex_ie *bc_ie; struct ieee80211_2040_intol_chan_report *ic_report; struct wpabuf *buf; wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR " (num_channels=%u num_intol=%u)", MAC2STR(wpa_s->bssid), num_channels, num_intol); wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels", chan_list, num_channels); buf = wpabuf_alloc(2 + /* action.category + action_code */ sizeof(struct ieee80211_2040_bss_coex_ie) + sizeof(struct ieee80211_2040_intol_chan_report) + num_channels); if (buf == NULL) return; wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC); wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX); bc_ie = wpabuf_put(buf, sizeof(*bc_ie)); bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE; bc_ie->length = 1; if (num_intol) bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ; if (num_channels > 0) { ic_report = wpabuf_put(buf, sizeof(*ic_report)); ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT; ic_report->length = num_channels + 1; ic_report->op_class = 0; os_memcpy(wpabuf_put(buf, num_channels), chan_list, num_channels); } if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, wpa_s->own_addr, wpa_s->bssid, wpabuf_head(buf), wpabuf_len(buf), 0) < 0) { wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send 20/40 BSS Coexistence frame"); } wpabuf_free(buf); } int sme_proc_obss_scan(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; const u8 *ie; u16 ht_cap; u8 chan_list[P2P_MAX_CHANNELS], channel; u8 num_channels = 0, num_intol = 0, i; if (!wpa_s->sme.sched_obss_scan) return 0; wpa_s->sme.sched_obss_scan = 0; if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED) return 1; /* * Check whether AP uses regulatory triplet or channel triplet in * country info. Right now the operating class of the BSS channel * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12), * based on the assumption that operating class triplet is not used in * beacon frame. If the First Channel Number/Operating Extension * Identifier octet has a positive integer value of 201 or greater, * then its operating class triplet. * * TODO: If Supported Operating Classes element is present in beacon * frame, have to lookup operating class in Annex E and fill them in * 2040 coex frame. */ ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY); if (ie && (ie[1] >= 6) && (ie[5] >= 201)) return 1; os_memset(chan_list, 0, sizeof(chan_list)); dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { /* Skip other band bss */ enum hostapd_hw_mode mode; mode = ieee80211_freq_to_chan(bss->freq, &channel); if (mode != HOSTAPD_MODE_IEEE80211G && mode != HOSTAPD_MODE_IEEE80211B) continue; ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP); ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0; wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR " freq=%u chan=%u ht_cap=0x%x", MAC2STR(bss->bssid), bss->freq, channel, ht_cap); if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) { if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT) num_intol++; /* Check whether the channel is already considered */ for (i = 0; i < num_channels; i++) { if (channel == chan_list[i]) break; } if (i != num_channels) continue; chan_list[num_channels++] = channel; } } sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol); return 1; } static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s, struct wpa_driver_scan_params *params) { /* Include only affected channels */ struct hostapd_hw_modes *mode; int count, i; int start, end; mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, HOSTAPD_MODE_IEEE80211G); if (mode == NULL) { /* No channels supported in this band - use empty list */ params->freqs = os_zalloc(sizeof(int)); return; } if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN && wpa_s->current_bss) { const u8 *ie; ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION); if (ie && ie[1] >= 2) { u8 o; o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE; else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW; } } start = wpa_s->assoc_freq - 10; end = wpa_s->assoc_freq + 10; switch (wpa_s->sme.ht_sec_chan) { case HT_SEC_CHAN_UNKNOWN: /* HT40+ possible on channels 1..9 */ if (wpa_s->assoc_freq <= 2452) start -= 20; /* HT40- possible on channels 5-13 */ if (wpa_s->assoc_freq >= 2432) end += 20; break; case HT_SEC_CHAN_ABOVE: end += 20; break; case HT_SEC_CHAN_BELOW: start -= 20; break; } wpa_printf(MSG_DEBUG, "OBSS: assoc_freq %d possible affected range %d-%d", wpa_s->assoc_freq, start, end); params->freqs = os_calloc(mode->num_channels + 1, sizeof(int)); if (params->freqs == NULL) return; for (count = 0, i = 0; i < mode->num_channels; i++) { int freq; if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED) continue; freq = mode->channels[i].freq; if (freq - 10 >= end || freq + 10 <= start) continue; /* not affected */ params->freqs[count++] = freq; } } static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; struct wpa_driver_scan_params params; if (!wpa_s->current_bss) { wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request"); return; } os_memset(¶ms, 0, sizeof(params)); wpa_obss_scan_freqs_list(wpa_s, ¶ms); params.low_priority = 1; wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan"); if (wpa_supplicant_trigger_scan(wpa_s, ¶ms)) wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan"); else wpa_s->sme.sched_obss_scan = 1; os_free(params.freqs); eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, sme_obss_scan_timeout, wpa_s, NULL); } void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable) { const u8 *ie; struct wpa_bss *bss = wpa_s->current_bss; struct wpa_ssid *ssid = wpa_s->current_ssid; struct hostapd_hw_modes *hw_mode = NULL; int i; eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL); wpa_s->sme.sched_obss_scan = 0; wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN; if (!enable) return; /* * Schedule OBSS scan if driver is using station SME in wpa_supplicant * or it expects OBSS scan to be performed by wpa_supplicant. */ if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) || ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA) return; if (!wpa_s->hw.modes) return; /* only HT caps in 11g mode are relevant */ for (i = 0; i < wpa_s->hw.num_modes; i++) { hw_mode = &wpa_s->hw.modes[i]; if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G) break; } /* Driver does not support HT40 for 11g or doesn't have 11g. */ if (i == wpa_s->hw.num_modes || !hw_mode || !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) return; if (bss == NULL || bss->freq < 2400 || bss->freq > 2500) return; /* Not associated on 2.4 GHz band */ /* Check whether AP supports HT40 */ ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP); if (!ie || ie[1] < 2 || !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) return; /* AP does not support HT40 */ ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS); if (!ie || ie[1] < 14) return; /* AP does not request OBSS scans */ wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6); if (wpa_s->sme.obss_scan_int < 10) { wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u " "replaced with the minimum 10 sec", wpa_s->sme.obss_scan_int); wpa_s->sme.obss_scan_int = 10; } wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec", wpa_s->sme.obss_scan_int); eloop_register_timeout(wpa_s->sme.obss_scan_int, 0, sme_obss_scan_timeout, wpa_s, NULL); } #ifdef CONFIG_IEEE80211W static const unsigned int sa_query_max_timeout = 1000; static const unsigned int sa_query_retry_timeout = 201; static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s) { u32 tu; struct os_reltime now, passed; os_get_reltime(&now); os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed); tu = (passed.sec * 1000000 + passed.usec) / 1024; if (sa_query_max_timeout < tu) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out"); sme_stop_sa_query(wpa_s); wpa_supplicant_deauthenticate( wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID); return 1; } return 0; } static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s, const u8 *trans_id) { u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN]; wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to " MACSTR, MAC2STR(wpa_s->bssid)); wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID", trans_id, WLAN_SA_QUERY_TR_ID_LEN); req[0] = WLAN_ACTION_SA_QUERY; req[1] = WLAN_SA_QUERY_REQUEST; os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN); if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, wpa_s->own_addr, wpa_s->bssid, req, sizeof(req), 0) < 0) wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query " "Request"); } static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; unsigned int timeout, sec, usec; u8 *trans_id, *nbuf; if (wpa_s->sme.sa_query_count > 0 && sme_check_sa_query_timeout(wpa_s)) return; nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id, wpa_s->sme.sa_query_count + 1, WLAN_SA_QUERY_TR_ID_LEN); if (nbuf == NULL) return; if (wpa_s->sme.sa_query_count == 0) { /* Starting a new SA Query procedure */ os_get_reltime(&wpa_s->sme.sa_query_start); } trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN; wpa_s->sme.sa_query_trans_id = nbuf; wpa_s->sme.sa_query_count++; if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) { wpa_printf(MSG_DEBUG, "Could not generate SA Query ID"); return; } timeout = sa_query_retry_timeout; sec = ((timeout / 1000) * 1024) / 1000; usec = (timeout % 1000) * 1024; eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL); wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d", wpa_s->sme.sa_query_count); sme_send_sa_query_req(wpa_s, trans_id); } static void sme_start_sa_query(struct wpa_supplicant *wpa_s) { sme_sa_query_timer(wpa_s, NULL); } static void sme_stop_sa_query(struct wpa_supplicant *wpa_s) { eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL); os_free(wpa_s->sme.sa_query_trans_id); wpa_s->sme.sa_query_trans_id = NULL; wpa_s->sme.sa_query_count = 0; } void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa, const u8 *da, u16 reason_code) { struct wpa_ssid *ssid; struct os_reltime now; if (wpa_s->wpa_state != WPA_COMPLETED) return; ssid = wpa_s->current_ssid; if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION) return; if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) return; if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA && reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA) return; if (wpa_s->sme.sa_query_count > 0) return; os_get_reltime(&now); if (wpa_s->sme.last_unprot_disconnect.sec && !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10)) return; /* limit SA Query procedure frequency */ wpa_s->sme.last_unprot_disconnect = now; wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - " "possible AP/STA state mismatch - trigger SA Query"); sme_start_sa_query(wpa_s); } void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa, const u8 *data, size_t len) { int i; if (wpa_s->sme.sa_query_trans_id == NULL || len < 1 + WLAN_SA_QUERY_TR_ID_LEN || data[0] != WLAN_SA_QUERY_RESPONSE) return; wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from " MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]); if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) return; for (i = 0; i < wpa_s->sme.sa_query_count; i++) { if (os_memcmp(wpa_s->sme.sa_query_trans_id + i * WLAN_SA_QUERY_TR_ID_LEN, data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0) break; } if (i >= wpa_s->sme.sa_query_count) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query " "transaction identifier found"); return; } wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received " "from " MACSTR, MAC2STR(sa)); sme_stop_sa_query(wpa_s); } #endif /* CONFIG_IEEE80211W */