/* * WPA Supplicant - Driver event processing * Copyright (c) 2003-2014, Jouni Malinen * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "includes.h" #include "common.h" #include "eapol_supp/eapol_supp_sm.h" #include "rsn_supp/wpa.h" #include "eloop.h" #include "config.h" #include "l2_packet/l2_packet.h" #include "wpa_supplicant_i.h" #include "driver_i.h" #include "pcsc_funcs.h" #include "rsn_supp/preauth.h" #include "rsn_supp/pmksa_cache.h" #include "common/wpa_ctrl.h" #include "eap_peer/eap.h" #include "ap/hostapd.h" #include "p2p/p2p.h" #include "wnm_sta.h" #include "notify.h" #include "common/ieee802_11_defs.h" #include "common/ieee802_11_common.h" #include "crypto/random.h" #include "blacklist.h" #include "wpas_glue.h" #include "wps_supplicant.h" #include "ibss_rsn.h" #include "sme.h" #include "gas_query.h" #include "p2p_supplicant.h" #include "bgscan.h" #include "autoscan.h" #include "ap.h" #include "bss.h" #include "scan.h" #include "offchannel.h" #include "interworking.h" #ifndef CONFIG_NO_SCAN_PROCESSING static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s, int new_scan, int own_request); #endif /* CONFIG_NO_SCAN_PROCESSING */ static int wpas_temp_disabled(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) { struct os_reltime now; if (ssid == NULL || ssid->disabled_until.sec == 0) return 0; os_get_reltime(&now); if (ssid->disabled_until.sec > now.sec) return ssid->disabled_until.sec - now.sec; wpas_clear_temp_disabled(wpa_s, ssid, 0); return 0; } static struct wpa_bss * wpa_supplicant_get_new_bss( struct wpa_supplicant *wpa_s, const u8 *bssid) { struct wpa_bss *bss = NULL; struct wpa_ssid *ssid = wpa_s->current_ssid; if (ssid->ssid_len > 0) bss = wpa_bss_get(wpa_s, bssid, ssid->ssid, ssid->ssid_len); if (!bss) bss = wpa_bss_get_bssid(wpa_s, bssid); return bss; } static void wpa_supplicant_update_current_bss(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss = wpa_supplicant_get_new_bss(wpa_s, wpa_s->bssid); if (!bss) { wpa_supplicant_update_scan_results(wpa_s); /* Get the BSS from the new scan results */ bss = wpa_supplicant_get_new_bss(wpa_s, wpa_s->bssid); } if (bss) wpa_s->current_bss = bss; } static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s) { struct wpa_ssid *ssid, *old_ssid; int res; if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid) { wpa_supplicant_update_current_bss(wpa_s); return 0; } wpa_dbg(wpa_s, MSG_DEBUG, "Select network based on association " "information"); ssid = wpa_supplicant_get_ssid(wpa_s); if (ssid == NULL) { wpa_msg(wpa_s, MSG_INFO, "No network configuration found for the current AP"); return -1; } if (wpas_network_disabled(wpa_s, ssid)) { wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is disabled"); return -1; } if (disallowed_bssid(wpa_s, wpa_s->bssid) || disallowed_ssid(wpa_s, ssid->ssid, ssid->ssid_len)) { wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS is disallowed"); return -1; } res = wpas_temp_disabled(wpa_s, ssid); if (res > 0) { wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is temporarily " "disabled for %d second(s)", res); return -1; } wpa_dbg(wpa_s, MSG_DEBUG, "Network configuration found for the " "current AP"); if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { u8 wpa_ie[80]; size_t wpa_ie_len = sizeof(wpa_ie); if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, wpa_ie, &wpa_ie_len) < 0) wpa_dbg(wpa_s, MSG_DEBUG, "Could not set WPA suites"); } else { wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); } if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) eapol_sm_invalidate_cached_session(wpa_s->eapol); old_ssid = wpa_s->current_ssid; wpa_s->current_ssid = ssid; wpa_supplicant_update_current_bss(wpa_s); 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); return 0; } void wpa_supplicant_stop_countermeasures(void *eloop_ctx, void *sock_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (wpa_s->countermeasures) { wpa_s->countermeasures = 0; wpa_drv_set_countermeasures(wpa_s, 0); wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped"); wpa_supplicant_req_scan(wpa_s, 0, 0); } } void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s) { int bssid_changed; wnm_bss_keep_alive_deinit(wpa_s); #ifdef CONFIG_IBSS_RSN ibss_rsn_deinit(wpa_s->ibss_rsn); wpa_s->ibss_rsn = NULL; #endif /* CONFIG_IBSS_RSN */ #ifdef CONFIG_AP wpa_supplicant_ap_deinit(wpa_s); #endif /* CONFIG_AP */ if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) return; wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); bssid_changed = !is_zero_ether_addr(wpa_s->bssid); os_memset(wpa_s->bssid, 0, ETH_ALEN); os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); #ifdef CONFIG_SME wpa_s->sme.prev_bssid_set = 0; #endif /* CONFIG_SME */ #ifdef CONFIG_P2P os_memset(wpa_s->go_dev_addr, 0, ETH_ALEN); #endif /* CONFIG_P2P */ wpa_s->current_bss = NULL; wpa_s->assoc_freq = 0; #ifdef CONFIG_IEEE80211R #ifdef CONFIG_SME if (wpa_s->sme.ft_ies) sme_update_ft_ies(wpa_s, NULL, NULL, 0); #endif /* CONFIG_SME */ #endif /* CONFIG_IEEE80211R */ if (bssid_changed) wpas_notify_bssid_changed(wpa_s); eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE); eapol_sm_notify_portValid(wpa_s->eapol, FALSE); if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); wpa_s->ap_ies_from_associnfo = 0; wpa_s->current_ssid = NULL; eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); wpa_s->key_mgmt = 0; } static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s) { struct wpa_ie_data ie; int pmksa_set = -1; size_t i; if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 || ie.pmkid == NULL) return; for (i = 0; i < ie.num_pmkid; i++) { pmksa_set = pmksa_cache_set_current(wpa_s->wpa, ie.pmkid + i * PMKID_LEN, NULL, NULL, 0); if (pmksa_set == 0) { eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1); break; } } wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from " "PMKSA cache", pmksa_set == 0 ? "" : "not "); } static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { if (data == NULL) { wpa_dbg(wpa_s, MSG_DEBUG, "RSN: No data in PMKID candidate " "event"); return; } wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR " index=%d preauth=%d", MAC2STR(data->pmkid_candidate.bssid), data->pmkid_candidate.index, data->pmkid_candidate.preauth); pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid, data->pmkid_candidate.index, data->pmkid_candidate.preauth); } static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s) { if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) return 0; #ifdef IEEE8021X_EAPOL if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA && wpa_s->current_ssid && !(wpa_s->current_ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST | EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) { /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either * plaintext or static WEP keys). */ return 0; } #endif /* IEEE8021X_EAPOL */ return 1; } /** * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC * @wpa_s: pointer to wpa_supplicant data * @ssid: Configuration data for the network * Returns: 0 on success, -1 on failure * * This function is called when starting authentication with a network that is * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA). */ int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) { #ifdef IEEE8021X_EAPOL #ifdef PCSC_FUNCS int aka = 0, sim = 0; if ((ssid != NULL && ssid->eap.pcsc == NULL) || wpa_s->scard != NULL || wpa_s->conf->external_sim) return 0; if (ssid == NULL || ssid->eap.eap_methods == NULL) { sim = 1; aka = 1; } else { struct eap_method_type *eap = ssid->eap.eap_methods; while (eap->vendor != EAP_VENDOR_IETF || eap->method != EAP_TYPE_NONE) { if (eap->vendor == EAP_VENDOR_IETF) { if (eap->method == EAP_TYPE_SIM) sim = 1; else if (eap->method == EAP_TYPE_AKA || eap->method == EAP_TYPE_AKA_PRIME) aka = 1; } eap++; } } if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL) sim = 0; if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL && eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA_PRIME) == NULL) aka = 0; if (!sim && !aka) { wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to " "use SIM, but neither EAP-SIM nor EAP-AKA are " "enabled"); return 0; } wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to use SIM " "(sim=%d aka=%d) - initialize PCSC", sim, aka); wpa_s->scard = scard_init(wpa_s->conf->pcsc_reader); if (wpa_s->scard == NULL) { wpa_msg(wpa_s, MSG_WARNING, "Failed to initialize SIM " "(pcsc-lite)"); return -1; } wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard); eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard); #endif /* PCSC_FUNCS */ #endif /* IEEE8021X_EAPOL */ return 0; } #ifndef CONFIG_NO_SCAN_PROCESSING static int has_wep_key(struct wpa_ssid *ssid) { int i; for (i = 0; i < NUM_WEP_KEYS; i++) { if (ssid->wep_key_len[i]) return 1; } return 0; } static int wpa_supplicant_match_privacy(struct wpa_bss *bss, struct wpa_ssid *ssid) { int privacy = 0; if (ssid->mixed_cell) return 1; #ifdef CONFIG_WPS if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) return 1; #endif /* CONFIG_WPS */ if (has_wep_key(ssid)) privacy = 1; #ifdef IEEE8021X_EAPOL if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST | EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) privacy = 1; #endif /* IEEE8021X_EAPOL */ if (wpa_key_mgmt_wpa(ssid->key_mgmt)) privacy = 1; if (ssid->key_mgmt & WPA_KEY_MGMT_OSEN) privacy = 1; if (bss->caps & IEEE80211_CAP_PRIVACY) return privacy; return !privacy; } static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, struct wpa_bss *bss) { struct wpa_ie_data ie; int proto_match = 0; const u8 *rsn_ie, *wpa_ie; int ret; int wep_ok; ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss); if (ret >= 0) return ret; /* Allow TSN if local configuration accepts WEP use without WPA/WPA2 */ wep_ok = !wpa_key_mgmt_wpa(ssid->key_mgmt) && (((ssid->key_mgmt & WPA_KEY_MGMT_NONE) && ssid->wep_key_len[ssid->wep_tx_keyidx] > 0) || (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)); rsn_ie = wpa_bss_get_ie(bss, WLAN_EID_RSN); while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) { proto_match++; if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - parse " "failed"); break; } if (wep_ok && (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104))) { wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN " "in RSN IE"); return 1; } if (!(ie.proto & ssid->proto)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - proto " "mismatch"); break; } if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - PTK " "cipher mismatch"); break; } if (!(ie.group_cipher & ssid->group_cipher)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - GTK " "cipher mismatch"); break; } if (!(ie.key_mgmt & ssid->key_mgmt)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - key mgmt " "mismatch"); break; } #ifdef CONFIG_IEEE80211W if (!(ie.capabilities & WPA_CAPABILITY_MFPC) && (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ? wpa_s->conf->pmf : ssid->ieee80211w) == MGMT_FRAME_PROTECTION_REQUIRED) { wpa_dbg(wpa_s, MSG_DEBUG, " skip RSN IE - no mgmt " "frame protection"); break; } #endif /* CONFIG_IEEE80211W */ wpa_dbg(wpa_s, MSG_DEBUG, " selected based on RSN IE"); return 1; } wpa_ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE); while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) { proto_match++; if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - parse " "failed"); break; } if (wep_ok && (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104))) { wpa_dbg(wpa_s, MSG_DEBUG, " selected based on TSN " "in WPA IE"); return 1; } if (!(ie.proto & ssid->proto)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - proto " "mismatch"); break; } if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - PTK " "cipher mismatch"); break; } if (!(ie.group_cipher & ssid->group_cipher)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - GTK " "cipher mismatch"); break; } if (!(ie.key_mgmt & ssid->key_mgmt)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip WPA IE - key mgmt " "mismatch"); break; } wpa_dbg(wpa_s, MSG_DEBUG, " selected based on WPA IE"); return 1; } if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && !wpa_ie && !rsn_ie) { wpa_dbg(wpa_s, MSG_DEBUG, " allow for non-WPA IEEE 802.1X"); return 1; } if ((ssid->proto & (WPA_PROTO_WPA | WPA_PROTO_RSN)) && wpa_key_mgmt_wpa(ssid->key_mgmt) && proto_match == 0) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - no WPA/RSN proto match"); return 0; } if ((ssid->key_mgmt & WPA_KEY_MGMT_OSEN) && wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE)) { wpa_dbg(wpa_s, MSG_DEBUG, " allow in OSEN"); return 1; } if (!wpa_key_mgmt_wpa(ssid->key_mgmt)) { wpa_dbg(wpa_s, MSG_DEBUG, " allow in non-WPA/WPA2"); return 1; } wpa_dbg(wpa_s, MSG_DEBUG, " reject due to mismatch with " "WPA/WPA2"); return 0; } static int freq_allowed(int *freqs, int freq) { int i; if (freqs == NULL) return 1; for (i = 0; freqs[i]; i++) if (freqs[i] == freq) return 1; return 0; } static int ht_supported(const struct hostapd_hw_modes *mode) { if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) { /* * The driver did not indicate whether it supports HT. Assume * it does to avoid connection issues. */ return 1; } /* * IEEE Std 802.11n-2009 20.1.1: * An HT non-AP STA shall support all EQM rates for one spatial stream. */ return mode->mcs_set[0] == 0xff; } static int vht_supported(const struct hostapd_hw_modes *mode) { if (!(mode->flags & HOSTAPD_MODE_FLAG_VHT_INFO_KNOWN)) { /* * The driver did not indicate whether it supports VHT. Assume * it does to avoid connection issues. */ return 1; } /* * A VHT non-AP STA shall support MCS 0-7 for one spatial stream. * TODO: Verify if this complies with the standard */ return (mode->vht_mcs_set[0] & 0x3) != 3; } static int rate_match(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { const struct hostapd_hw_modes *mode = NULL, *modes; const u8 scan_ie[2] = { WLAN_EID_SUPP_RATES, WLAN_EID_EXT_SUPP_RATES }; const u8 *rate_ie; int i, j, k; if (bss->freq == 0) return 1; /* Cannot do matching without knowing band */ modes = wpa_s->hw.modes; if (modes == NULL) { /* * The driver does not provide any additional information * about the utilized hardware, so allow the connection attempt * to continue. */ return 1; } for (i = 0; i < wpa_s->hw.num_modes; i++) { for (j = 0; j < modes[i].num_channels; j++) { int freq = modes[i].channels[j].freq; if (freq == bss->freq) { if (mode && mode->mode == HOSTAPD_MODE_IEEE80211G) break; /* do not allow 802.11b replace * 802.11g */ mode = &modes[i]; break; } } } if (mode == NULL) return 0; for (i = 0; i < (int) sizeof(scan_ie); i++) { rate_ie = wpa_bss_get_ie(bss, scan_ie[i]); if (rate_ie == NULL) continue; for (j = 2; j < rate_ie[1] + 2; j++) { int flagged = !!(rate_ie[j] & 0x80); int r = (rate_ie[j] & 0x7f) * 5; /* * IEEE Std 802.11n-2009 7.3.2.2: * The new BSS Membership selector value is encoded * like a legacy basic rate, but it is not a rate and * only indicates if the BSS members are required to * support the mandatory features of Clause 20 [HT PHY] * in order to join the BSS. */ if (flagged && ((rate_ie[j] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)) { if (!ht_supported(mode)) { wpa_dbg(wpa_s, MSG_DEBUG, " hardware does not support " "HT PHY"); return 0; } continue; } /* There's also a VHT selector for 802.11ac */ if (flagged && ((rate_ie[j] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) { if (!vht_supported(mode)) { wpa_dbg(wpa_s, MSG_DEBUG, " hardware does not support " "VHT PHY"); return 0; } continue; } if (!flagged) continue; /* check for legacy basic rates */ for (k = 0; k < mode->num_rates; k++) { if (mode->rates[k] == r) break; } if (k == mode->num_rates) { /* * IEEE Std 802.11-2007 7.3.2.2 demands that in * order to join a BSS all required rates * have to be supported by the hardware. */ wpa_dbg(wpa_s, MSG_DEBUG, " hardware does " "not support required rate %d.%d Mbps", r / 10, r % 10); return 0; } } } return 1; } /* * Test whether BSS is in an ESS. * This is done differently in DMG (60 GHz) and non-DMG bands */ static int bss_is_ess(struct wpa_bss *bss) { if (bss_is_dmg(bss)) { return (bss->caps & IEEE80211_CAP_DMG_MASK) == IEEE80211_CAP_DMG_AP; } return ((bss->caps & (IEEE80211_CAP_ESS | IEEE80211_CAP_IBSS)) == IEEE80211_CAP_ESS); } static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s, int i, struct wpa_bss *bss, struct wpa_ssid *group, int only_first_ssid) { u8 wpa_ie_len, rsn_ie_len; int wpa; struct wpa_blacklist *e; const u8 *ie; struct wpa_ssid *ssid; int osen; ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE); wpa_ie_len = ie ? ie[1] : 0; ie = wpa_bss_get_ie(bss, WLAN_EID_RSN); rsn_ie_len = ie ? ie[1] : 0; ie = wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE); osen = ie != NULL; wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR " ssid='%s' " "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d%s%s%s", i, MAC2STR(bss->bssid), wpa_ssid_txt(bss->ssid, bss->ssid_len), wpa_ie_len, rsn_ie_len, bss->caps, bss->level, wpa_bss_get_vendor_ie(bss, WPS_IE_VENDOR_TYPE) ? " wps" : "", (wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) || wpa_bss_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) ? " p2p" : "", osen ? " osen=1" : ""); e = wpa_blacklist_get(wpa_s, bss->bssid); if (e) { int limit = 1; if (wpa_supplicant_enabled_networks(wpa_s) == 1) { /* * When only a single network is enabled, we can * trigger blacklisting on the first failure. This * should not be done with multiple enabled networks to * avoid getting forced to move into a worse ESS on * single error if there are no other BSSes of the * current ESS. */ limit = 0; } if (e->count > limit) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted " "(count=%d limit=%d)", e->count, limit); return NULL; } } if (bss->ssid_len == 0) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID not known"); return NULL; } if (disallowed_bssid(wpa_s, bss->bssid)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID disallowed"); return NULL; } if (disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID disallowed"); return NULL; } wpa = wpa_ie_len > 0 || rsn_ie_len > 0; for (ssid = group; ssid; ssid = only_first_ssid ? NULL : ssid->pnext) { int check_ssid = wpa ? 1 : (ssid->ssid_len != 0); int res; if (wpas_network_disabled(wpa_s, ssid)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled"); continue; } res = wpas_temp_disabled(wpa_s, ssid); if (res > 0) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - disabled " "temporarily for %d second(s)", res); continue; } #ifdef CONFIG_WPS if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && e && e->count > 0) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - blacklisted " "(WPS)"); continue; } if (wpa && ssid->ssid_len == 0 && wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss)) check_ssid = 0; if (!wpa && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) { /* Only allow wildcard SSID match if an AP * advertises active WPS operation that matches * with our mode. */ check_ssid = 1; if (ssid->ssid_len == 0 && wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss)) check_ssid = 0; } #endif /* CONFIG_WPS */ if (ssid->bssid_set && ssid->ssid_len == 0 && os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0) check_ssid = 0; if (check_ssid && (bss->ssid_len != ssid->ssid_len || os_memcmp(bss->ssid, ssid->ssid, bss->ssid_len) != 0)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - SSID mismatch"); continue; } if (ssid->bssid_set && os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - BSSID mismatch"); continue; } if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss)) continue; if (!osen && !wpa && !(ssid->key_mgmt & WPA_KEY_MGMT_NONE) && !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - non-WPA network " "not allowed"); continue; } if (wpa && !wpa_key_mgmt_wpa(ssid->key_mgmt) && has_wep_key(ssid)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - ignore WPA/WPA2 AP for WEP network block"); continue; } if ((ssid->key_mgmt & WPA_KEY_MGMT_OSEN) && !osen) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - non-OSEN network " "not allowed"); continue; } if (!wpa_supplicant_match_privacy(bss, ssid)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - privacy " "mismatch"); continue; } if (!bss_is_ess(bss)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - not ESS network"); continue; } if (!freq_allowed(ssid->freq_list, bss->freq)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - frequency not " "allowed"); continue; } if (!rate_match(wpa_s, bss)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - rate sets do " "not match"); continue; } #ifdef CONFIG_P2P if (ssid->p2p_group && !wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) && !wpa_bss_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - no P2P IE seen"); continue; } if (!is_zero_ether_addr(ssid->go_p2p_dev_addr)) { struct wpabuf *p2p_ie; u8 dev_addr[ETH_ALEN]; ie = wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE); if (ie == NULL) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - no P2P element"); continue; } p2p_ie = wpa_bss_get_vendor_ie_multi( bss, P2P_IE_VENDOR_TYPE); if (p2p_ie == NULL) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - could not fetch P2P element"); continue; } if (p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr) < 0 || os_memcmp(dev_addr, ssid->go_p2p_dev_addr, ETH_ALEN) != 0) { wpa_dbg(wpa_s, MSG_DEBUG, " skip - no matching GO P2P Device Address in P2P element"); wpabuf_free(p2p_ie); continue; } wpabuf_free(p2p_ie); } /* * TODO: skip the AP if its P2P IE has Group Formation * bit set in the P2P Group Capability Bitmap and we * are not in Group Formation with that device. */ #endif /* CONFIG_P2P */ /* Matching configuration found */ return ssid; } /* No matching configuration found */ return NULL; } static struct wpa_bss * wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group, struct wpa_ssid **selected_ssid, int only_first_ssid) { unsigned int i; if (only_first_ssid) wpa_dbg(wpa_s, MSG_DEBUG, "Try to find BSS matching pre-selected network id=%d", group->id); else wpa_dbg(wpa_s, MSG_DEBUG, "Selecting BSS from priority group %d", group->priority); for (i = 0; i < wpa_s->last_scan_res_used; i++) { struct wpa_bss *bss = wpa_s->last_scan_res[i]; *selected_ssid = wpa_scan_res_match(wpa_s, i, bss, group, only_first_ssid); if (!*selected_ssid) continue; wpa_dbg(wpa_s, MSG_DEBUG, " selected BSS " MACSTR " ssid='%s'", MAC2STR(bss->bssid), wpa_ssid_txt(bss->ssid, bss->ssid_len)); return bss; } return NULL; } struct wpa_bss * wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s, struct wpa_ssid **selected_ssid) { struct wpa_bss *selected = NULL; int prio; struct wpa_ssid *next_ssid = NULL; if (wpa_s->last_scan_res == NULL || wpa_s->last_scan_res_used == 0) return NULL; /* no scan results from last update */ if (wpa_s->next_ssid) { struct wpa_ssid *ssid; /* check that next_ssid is still valid */ for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { if (ssid == wpa_s->next_ssid) break; } next_ssid = ssid; wpa_s->next_ssid = NULL; } while (selected == NULL) { for (prio = 0; prio < wpa_s->conf->num_prio; prio++) { if (next_ssid && next_ssid->priority == wpa_s->conf->pssid[prio]->priority) { selected = wpa_supplicant_select_bss( wpa_s, next_ssid, selected_ssid, 1); if (selected) break; } selected = wpa_supplicant_select_bss( wpa_s, wpa_s->conf->pssid[prio], selected_ssid, 0); if (selected) break; } if (selected == NULL && wpa_s->blacklist && !wpa_s->countermeasures) { wpa_dbg(wpa_s, MSG_DEBUG, "No APs found - clear " "blacklist and try again"); wpa_blacklist_clear(wpa_s); wpa_s->blacklist_cleared++; } else if (selected == NULL) break; } return selected; } static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s, int timeout_sec, int timeout_usec) { if (!wpa_supplicant_enabled_networks(wpa_s)) { /* * No networks are enabled; short-circuit request so * we don't wait timeout seconds before transitioning * to INACTIVE state. */ wpa_dbg(wpa_s, MSG_DEBUG, "Short-circuit new scan request " "since there are no enabled networks"); wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); return; } wpa_s->scan_for_connection = 1; wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec); } int wpa_supplicant_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *selected, struct wpa_ssid *ssid) { if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) { wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP "PBC session overlap"); #ifdef CONFIG_P2P if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT || wpa_s->p2p_in_provisioning) { eloop_register_timeout(0, 0, wpas_p2p_pbc_overlap_cb, wpa_s, NULL); return -1; } #endif /* CONFIG_P2P */ #ifdef CONFIG_WPS wpas_wps_cancel(wpa_s); #endif /* CONFIG_WPS */ return -1; } wpa_msg(wpa_s, MSG_DEBUG, "Considering connect request: reassociate: %d selected: " MACSTR " bssid: " MACSTR " pending: " MACSTR " wpa_state: %s ssid=%p current_ssid=%p", wpa_s->reassociate, MAC2STR(selected->bssid), MAC2STR(wpa_s->bssid), MAC2STR(wpa_s->pending_bssid), wpa_supplicant_state_txt(wpa_s->wpa_state), ssid, wpa_s->current_ssid); /* * Do not trigger new association unless the BSSID has changed or if * reassociation is requested. If we are in process of associating with * the selected BSSID, do not trigger new attempt. */ if (wpa_s->reassociate || (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 && ((wpa_s->wpa_state != WPA_ASSOCIATING && wpa_s->wpa_state != WPA_AUTHENTICATING) || (!is_zero_ether_addr(wpa_s->pending_bssid) && os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) != 0) || (is_zero_ether_addr(wpa_s->pending_bssid) && ssid != wpa_s->current_ssid)))) { if (wpa_supplicant_scard_init(wpa_s, ssid)) { wpa_supplicant_req_new_scan(wpa_s, 10, 0); return 0; } wpa_msg(wpa_s, MSG_DEBUG, "Request association with " MACSTR, MAC2STR(selected->bssid)); wpa_supplicant_associate(wpa_s, selected, ssid); } else { wpa_dbg(wpa_s, MSG_DEBUG, "Already associated or trying to " "connect with the selected AP"); } return 0; } static struct wpa_ssid * wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s) { int prio; struct wpa_ssid *ssid; for (prio = 0; prio < wpa_s->conf->num_prio; prio++) { for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext) { if (wpas_network_disabled(wpa_s, ssid)) continue; if (ssid->mode == IEEE80211_MODE_IBSS || ssid->mode == IEEE80211_MODE_AP) return ssid; } } return NULL; } /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based * on BSS added and BSS changed events */ static void wpa_supplicant_rsn_preauth_scan_results( struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; if (rsn_preauth_scan_results(wpa_s->wpa) < 0) return; dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { const u8 *ssid, *rsn; ssid = wpa_bss_get_ie(bss, WLAN_EID_SSID); if (ssid == NULL) continue; rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); if (rsn == NULL) continue; rsn_preauth_scan_result(wpa_s->wpa, bss->bssid, ssid, rsn); } } static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s, struct wpa_bss *selected, struct wpa_ssid *ssid) { struct wpa_bss *current_bss = NULL; int min_diff; if (wpa_s->reassociate) return 1; /* explicit request to reassociate */ if (wpa_s->wpa_state < WPA_ASSOCIATED) return 1; /* we are not associated; continue */ if (wpa_s->current_ssid == NULL) return 1; /* unknown current SSID */ if (wpa_s->current_ssid != ssid) return 1; /* different network block */ if (wpas_driver_bss_selection(wpa_s)) return 0; /* Driver-based roaming */ if (wpa_s->current_ssid->ssid) current_bss = wpa_bss_get(wpa_s, wpa_s->bssid, wpa_s->current_ssid->ssid, wpa_s->current_ssid->ssid_len); if (!current_bss) current_bss = wpa_bss_get_bssid(wpa_s, wpa_s->bssid); if (!current_bss) return 1; /* current BSS not seen in scan results */ if (current_bss == selected) return 0; if (selected->last_update_idx > current_bss->last_update_idx) return 1; /* current BSS not seen in the last scan */ #ifndef CONFIG_NO_ROAMING wpa_dbg(wpa_s, MSG_DEBUG, "Considering within-ESS reassociation"); wpa_dbg(wpa_s, MSG_DEBUG, "Current BSS: " MACSTR " level=%d", MAC2STR(current_bss->bssid), current_bss->level); wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR " level=%d", MAC2STR(selected->bssid), selected->level); if (wpa_s->current_ssid->bssid_set && os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) == 0) { wpa_dbg(wpa_s, MSG_DEBUG, "Allow reassociation - selected BSS " "has preferred BSSID"); return 1; } if (current_bss->level < 0 && current_bss->level > selected->level) { wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - Current BSS has better " "signal level"); return 0; } min_diff = 2; if (current_bss->level < 0) { if (current_bss->level < -85) min_diff = 1; else if (current_bss->level < -80) min_diff = 2; else if (current_bss->level < -75) min_diff = 3; else if (current_bss->level < -70) min_diff = 4; else min_diff = 5; } if (abs(current_bss->level - selected->level) < min_diff) { wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - too small difference " "in signal level"); return 0; } return 1; #else /* CONFIG_NO_ROAMING */ return 0; #endif /* CONFIG_NO_ROAMING */ } /* Return != 0 if no scan results could be fetched or if scan results should not * be shared with other virtual interfaces. */ static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s, union wpa_event_data *data, int own_request) { struct wpa_scan_results *scan_res = NULL; int ret = 0; int ap = 0; #ifndef CONFIG_NO_RANDOM_POOL size_t i, num; #endif /* CONFIG_NO_RANDOM_POOL */ #ifdef CONFIG_AP if (wpa_s->ap_iface) ap = 1; #endif /* CONFIG_AP */ wpa_supplicant_notify_scanning(wpa_s, 0); scan_res = wpa_supplicant_get_scan_results(wpa_s, data ? &data->scan_info : NULL, 1); if (scan_res == NULL) { if (wpa_s->conf->ap_scan == 2 || ap || wpa_s->scan_res_handler == scan_only_handler) return -1; if (!own_request) return -1; wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results - try " "scanning again"); wpa_supplicant_req_new_scan(wpa_s, 1, 0); ret = -1; goto scan_work_done; } #ifndef CONFIG_NO_RANDOM_POOL num = scan_res->num; if (num > 10) num = 10; for (i = 0; i < num; i++) { u8 buf[5]; struct wpa_scan_res *res = scan_res->res[i]; buf[0] = res->bssid[5]; buf[1] = res->qual & 0xff; buf[2] = res->noise & 0xff; buf[3] = res->level & 0xff; buf[4] = res->tsf & 0xff; random_add_randomness(buf, sizeof(buf)); } #endif /* CONFIG_NO_RANDOM_POOL */ if (own_request && wpa_s->scan_res_handler && (wpa_s->own_scan_running || !wpa_s->external_scan_running)) { void (*scan_res_handler)(struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res); scan_res_handler = wpa_s->scan_res_handler; wpa_s->scan_res_handler = NULL; scan_res_handler(wpa_s, scan_res); ret = -2; goto scan_work_done; } if (ap) { wpa_dbg(wpa_s, MSG_DEBUG, "Ignore scan results in AP mode"); #ifdef CONFIG_AP if (wpa_s->ap_iface->scan_cb) wpa_s->ap_iface->scan_cb(wpa_s->ap_iface); #endif /* CONFIG_AP */ goto scan_work_done; } wpa_dbg(wpa_s, MSG_DEBUG, "New scan results available (own=%u ext=%u)", wpa_s->own_scan_running, wpa_s->external_scan_running); if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && wpa_s->manual_scan_use_id && wpa_s->own_scan_running) { wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u", wpa_s->manual_scan_id); wpa_s->manual_scan_use_id = 0; } else { wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS); } wpas_notify_scan_results(wpa_s); wpas_notify_scan_done(wpa_s, 1); if (!wpa_s->own_scan_running && wpa_s->external_scan_running) { wpa_dbg(wpa_s, MSG_DEBUG, "Do not use results from externally requested scan operation for network selection"); wpa_scan_results_free(scan_res); return 0; } if (sme_proc_obss_scan(wpa_s) > 0) goto scan_work_done; if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) goto scan_work_done; if (autoscan_notify_scan(wpa_s, scan_res)) goto scan_work_done; if (wpa_s->disconnected) { wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); goto scan_work_done; } if (!wpas_driver_bss_selection(wpa_s) && bgscan_notify_scan(wpa_s, scan_res) == 1) goto scan_work_done; wpas_wps_update_ap_info(wpa_s, scan_res); wpa_scan_results_free(scan_res); if (wpa_s->scan_work) { struct wpa_radio_work *work = wpa_s->scan_work; wpa_s->scan_work = NULL; radio_work_done(work); } return wpas_select_network_from_last_scan(wpa_s, 1, own_request); scan_work_done: wpa_scan_results_free(scan_res); if (wpa_s->scan_work) { struct wpa_radio_work *work = wpa_s->scan_work; wpa_s->scan_work = NULL; radio_work_done(work); } return ret; } static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s, int new_scan, int own_request) { struct wpa_bss *selected; struct wpa_ssid *ssid = NULL; selected = wpa_supplicant_pick_network(wpa_s, &ssid); if (selected) { int skip; skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid); if (skip) { if (new_scan) wpa_supplicant_rsn_preauth_scan_results(wpa_s); return 0; } if (wpa_supplicant_connect(wpa_s, selected, ssid) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "Connect failed"); return -1; } if (new_scan) wpa_supplicant_rsn_preauth_scan_results(wpa_s); /* * Do not notify other virtual radios of scan results since we do not * want them to start other associations at the same time. */ return 1; } else { wpa_dbg(wpa_s, MSG_DEBUG, "No suitable network found"); ssid = wpa_supplicant_pick_new_network(wpa_s); if (ssid) { wpa_dbg(wpa_s, MSG_DEBUG, "Setup a new network"); wpa_supplicant_associate(wpa_s, NULL, ssid); if (new_scan) wpa_supplicant_rsn_preauth_scan_results(wpa_s); } else if (own_request) { /* * No SSID found. If SCAN results are as a result of * own scan request and not due to a scan request on * another shared interface, try another scan. */ int timeout_sec = wpa_s->scan_interval; int timeout_usec = 0; #ifdef CONFIG_P2P if (wpas_p2p_scan_no_go_seen(wpa_s) == 1) return 0; if (wpa_s->p2p_in_provisioning || wpa_s->show_group_started || wpa_s->p2p_in_invitation) { /* * Use shorter wait during P2P Provisioning * state and during P2P join-a-group operation * to speed up group formation. */ timeout_sec = 0; timeout_usec = 250000; wpa_supplicant_req_new_scan(wpa_s, timeout_sec, timeout_usec); return 0; } #endif /* CONFIG_P2P */ #ifdef CONFIG_INTERWORKING if (wpa_s->conf->auto_interworking && wpa_s->conf->interworking && wpa_s->conf->cred) { wpa_dbg(wpa_s, MSG_DEBUG, "Interworking: " "start ANQP fetch since no matching " "networks found"); wpa_s->network_select = 1; wpa_s->auto_network_select = 1; interworking_start_fetch_anqp(wpa_s); return 1; } #endif /* CONFIG_INTERWORKING */ #ifdef CONFIG_WPS if (wpa_s->after_wps > 0 || wpas_wps_searching(wpa_s)) { wpa_dbg(wpa_s, MSG_DEBUG, "Use shorter wait during WPS processing"); timeout_sec = 0; timeout_usec = 500000; wpa_supplicant_req_new_scan(wpa_s, timeout_sec, timeout_usec); return 0; } #endif /* CONFIG_WPS */ if (wpa_supplicant_req_sched_scan(wpa_s)) wpa_supplicant_req_new_scan(wpa_s, timeout_sec, timeout_usec); } } return 0; } static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { struct wpa_supplicant *ifs; if (_wpa_supplicant_event_scan_results(wpa_s, data, 1) != 0) { /* * If no scan results could be fetched, then no need to * notify those interfaces that did not actually request * this scan. Similarly, if scan results started a new operation on this * interface, do not notify other interfaces to avoid concurrent * operations during a connection attempt. */ return; } /* * Check other interfaces to see if they share the same radio. If * so, they get updated with this same scan info. */ dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant, radio_list) { if (ifs != wpa_s) { wpa_printf(MSG_DEBUG, "%s: Updating scan results from " "sibling", ifs->ifname); _wpa_supplicant_event_scan_results(ifs, data, 0); } } } #endif /* CONFIG_NO_SCAN_PROCESSING */ int wpa_supplicant_fast_associate(struct wpa_supplicant *wpa_s) { #ifdef CONFIG_NO_SCAN_PROCESSING return -1; #else /* CONFIG_NO_SCAN_PROCESSING */ struct os_reltime now; if (wpa_s->last_scan_res_used <= 0) return -1; os_get_reltime(&now); if (os_reltime_expired(&now, &wpa_s->last_scan, 5)) { wpa_printf(MSG_DEBUG, "Fast associate: Old scan results"); return -1; } return wpas_select_network_from_last_scan(wpa_s, 0, 1); #endif /* CONFIG_NO_SCAN_PROCESSING */ } #ifdef CONFIG_WNM static void wnm_bss_keep_alive(void *eloop_ctx, void *sock_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (wpa_s->wpa_state < WPA_ASSOCIATED) return; if (!wpa_s->no_keep_alive) { wpa_printf(MSG_DEBUG, "WNM: Send keep-alive to AP " MACSTR, MAC2STR(wpa_s->bssid)); /* TODO: could skip this if normal data traffic has been sent */ /* TODO: Consider using some more appropriate data frame for * this */ if (wpa_s->l2) l2_packet_send(wpa_s->l2, wpa_s->bssid, 0x0800, (u8 *) "", 0); } #ifdef CONFIG_SME if (wpa_s->sme.bss_max_idle_period) { unsigned int msec; msec = wpa_s->sme.bss_max_idle_period * 1024; /* times 1000 */ if (msec > 100) msec -= 100; eloop_register_timeout(msec / 1000, msec % 1000 * 1000, wnm_bss_keep_alive, wpa_s, NULL); } #endif /* CONFIG_SME */ } static void wnm_process_assoc_resp(struct wpa_supplicant *wpa_s, const u8 *ies, size_t ies_len) { struct ieee802_11_elems elems; if (ies == NULL) return; if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) return; #ifdef CONFIG_SME if (elems.bss_max_idle_period) { unsigned int msec; wpa_s->sme.bss_max_idle_period = WPA_GET_LE16(elems.bss_max_idle_period); wpa_printf(MSG_DEBUG, "WNM: BSS Max Idle Period: %u (* 1000 " "TU)%s", wpa_s->sme.bss_max_idle_period, (elems.bss_max_idle_period[2] & 0x01) ? " (protected keep-live required)" : ""); if (wpa_s->sme.bss_max_idle_period == 0) wpa_s->sme.bss_max_idle_period = 1; if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) { eloop_cancel_timeout(wnm_bss_keep_alive, wpa_s, NULL); /* msec times 1000 */ msec = wpa_s->sme.bss_max_idle_period * 1024; if (msec > 100) msec -= 100; eloop_register_timeout(msec / 1000, msec % 1000 * 1000, wnm_bss_keep_alive, wpa_s, NULL); } } #endif /* CONFIG_SME */ } #endif /* CONFIG_WNM */ void wnm_bss_keep_alive_deinit(struct wpa_supplicant *wpa_s) { #ifdef CONFIG_WNM eloop_cancel_timeout(wnm_bss_keep_alive, wpa_s, NULL); #endif /* CONFIG_WNM */ } #ifdef CONFIG_INTERWORKING static int wpas_qos_map_set(struct wpa_supplicant *wpa_s, const u8 *qos_map, size_t len) { int res; wpa_hexdump(MSG_DEBUG, "Interworking: QoS Map Set", qos_map, len); res = wpa_drv_set_qos_map(wpa_s, qos_map, len); if (res) { wpa_printf(MSG_DEBUG, "Interworking: Failed to configure QoS Map Set to the driver"); } return res; } static void interworking_process_assoc_resp(struct wpa_supplicant *wpa_s, const u8 *ies, size_t ies_len) { struct ieee802_11_elems elems; if (ies == NULL) return; if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) return; if (elems.qos_map_set) { wpas_qos_map_set(wpa_s, elems.qos_map_set, elems.qos_map_set_len); } } #endif /* CONFIG_INTERWORKING */ static int wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { int l, len, found = 0, wpa_found, rsn_found; const u8 *p; #ifdef CONFIG_IEEE80211R u8 bssid[ETH_ALEN]; #endif /* CONFIG_IEEE80211R */ wpa_dbg(wpa_s, MSG_DEBUG, "Association info event"); if (data->assoc_info.req_ies) wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies, data->assoc_info.req_ies_len); if (data->assoc_info.resp_ies) { wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies, data->assoc_info.resp_ies_len); #ifdef CONFIG_TDLS wpa_tdls_assoc_resp_ies(wpa_s->wpa, data->assoc_info.resp_ies, data->assoc_info.resp_ies_len); #endif /* CONFIG_TDLS */ #ifdef CONFIG_WNM wnm_process_assoc_resp(wpa_s, data->assoc_info.resp_ies, data->assoc_info.resp_ies_len); #endif /* CONFIG_WNM */ #ifdef CONFIG_INTERWORKING interworking_process_assoc_resp(wpa_s, data->assoc_info.resp_ies, data->assoc_info.resp_ies_len); #endif /* CONFIG_INTERWORKING */ } if (data->assoc_info.beacon_ies) wpa_hexdump(MSG_DEBUG, "beacon_ies", data->assoc_info.beacon_ies, data->assoc_info.beacon_ies_len); if (data->assoc_info.freq) wpa_dbg(wpa_s, MSG_DEBUG, "freq=%u MHz", data->assoc_info.freq); p = data->assoc_info.req_ies; l = data->assoc_info.req_ies_len; /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */ while (p && l >= 2) { len = p[1] + 2; if (len > l) { wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info", p, l); break; } if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 && (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) || (p[0] == WLAN_EID_RSN && p[1] >= 2)) { if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len)) break; found = 1; wpa_find_assoc_pmkid(wpa_s); break; } l -= len; p += len; } if (!found && data->assoc_info.req_ies) wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); #ifdef CONFIG_IEEE80211R #ifdef CONFIG_SME if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FT) { if (wpa_drv_get_bssid(wpa_s, bssid) < 0 || wpa_ft_validate_reassoc_resp(wpa_s->wpa, data->assoc_info.resp_ies, data->assoc_info.resp_ies_len, bssid) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of " "Reassociation Response failed"); wpa_supplicant_deauthenticate( wpa_s, WLAN_REASON_INVALID_IE); return -1; } } p = data->assoc_info.resp_ies; l = data->assoc_info.resp_ies_len; #ifdef CONFIG_WPS_STRICT if (p && wpa_s->current_ssid && wpa_s->current_ssid->key_mgmt == WPA_KEY_MGMT_WPS) { struct wpabuf *wps; wps = ieee802_11_vendor_ie_concat(p, l, WPS_IE_VENDOR_TYPE); if (wps == NULL) { wpa_msg(wpa_s, MSG_INFO, "WPS-STRICT: AP did not " "include WPS IE in (Re)Association Response"); return -1; } if (wps_validate_assoc_resp(wps) < 0) { wpabuf_free(wps); wpa_supplicant_deauthenticate( wpa_s, WLAN_REASON_INVALID_IE); return -1; } wpabuf_free(wps); } #endif /* CONFIG_WPS_STRICT */ /* Go through the IEs and make a copy of the MDIE, if present. */ while (p && l >= 2) { len = p[1] + 2; if (len > l) { wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info", p, l); break; } if (p[0] == WLAN_EID_MOBILITY_DOMAIN && p[1] >= MOBILITY_DOMAIN_ID_LEN) { wpa_s->sme.ft_used = 1; os_memcpy(wpa_s->sme.mobility_domain, p + 2, MOBILITY_DOMAIN_ID_LEN); break; } l -= len; p += len; } #endif /* CONFIG_SME */ /* Process FT when SME is in the driver */ if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) && wpa_ft_is_completed(wpa_s->wpa)) { if (wpa_drv_get_bssid(wpa_s, bssid) < 0 || wpa_ft_validate_reassoc_resp(wpa_s->wpa, data->assoc_info.resp_ies, data->assoc_info.resp_ies_len, bssid) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of " "Reassociation Response failed"); wpa_supplicant_deauthenticate( wpa_s, WLAN_REASON_INVALID_IE); return -1; } wpa_dbg(wpa_s, MSG_DEBUG, "FT: Reassociation Response done"); } wpa_sm_set_ft_params(wpa_s->wpa, data->assoc_info.resp_ies, data->assoc_info.resp_ies_len); #endif /* CONFIG_IEEE80211R */ /* WPA/RSN IE from Beacon/ProbeResp */ p = data->assoc_info.beacon_ies; l = data->assoc_info.beacon_ies_len; /* Go through the IEs and make a copy of the WPA/RSN IEs, if present. */ wpa_found = rsn_found = 0; while (p && l >= 2) { len = p[1] + 2; if (len > l) { wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies", p, l); break; } if (!wpa_found && p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 && os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) { wpa_found = 1; wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len); } if (!rsn_found && p[0] == WLAN_EID_RSN && p[1] >= 2) { rsn_found = 1; wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len); } l -= len; p += len; } if (!wpa_found && data->assoc_info.beacon_ies) wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0); if (!rsn_found && data->assoc_info.beacon_ies) wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0); if (wpa_found || rsn_found) wpa_s->ap_ies_from_associnfo = 1; if (wpa_s->assoc_freq && data->assoc_info.freq && wpa_s->assoc_freq != data->assoc_info.freq) { wpa_printf(MSG_DEBUG, "Operating frequency changed from " "%u to %u MHz", wpa_s->assoc_freq, data->assoc_info.freq); wpa_supplicant_update_scan_results(wpa_s); } wpa_s->assoc_freq = data->assoc_info.freq; return 0; } static int wpa_supplicant_assoc_update_ie(struct wpa_supplicant *wpa_s) { const u8 *bss_wpa = NULL, *bss_rsn = NULL; if (!wpa_s->current_bss || !wpa_s->current_ssid) return -1; if (!wpa_key_mgmt_wpa_any(wpa_s->current_ssid->key_mgmt)) return 0; bss_wpa = wpa_bss_get_vendor_ie(wpa_s->current_bss, WPA_IE_VENDOR_TYPE); bss_rsn = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_RSN); if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa, bss_wpa ? 2 + bss_wpa[1] : 0) || wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn, bss_rsn ? 2 + bss_rsn[1] : 0)) return -1; return 0; } static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { u8 bssid[ETH_ALEN]; int ft_completed; #ifdef CONFIG_AP if (wpa_s->ap_iface) { if (!data) return; hostapd_notif_assoc(wpa_s->ap_iface->bss[0], data->assoc_info.addr, data->assoc_info.req_ies, data->assoc_info.req_ies_len, data->assoc_info.reassoc); return; } #endif /* CONFIG_AP */ ft_completed = wpa_ft_is_completed(wpa_s->wpa); if (data && wpa_supplicant_event_associnfo(wpa_s, data) < 0) return; if (wpa_drv_get_bssid(wpa_s, bssid) < 0) { wpa_dbg(wpa_s, MSG_ERROR, "Failed to get BSSID"); wpa_supplicant_deauthenticate( wpa_s, WLAN_REASON_DEAUTH_LEAVING); return; } wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED); if (os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) { wpa_dbg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID=" MACSTR, MAC2STR(bssid)); random_add_randomness(bssid, ETH_ALEN); os_memcpy(wpa_s->bssid, bssid, ETH_ALEN); os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); wpas_notify_bssid_changed(wpa_s); if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) { wpa_clear_keys(wpa_s, bssid); } if (wpa_supplicant_select_config(wpa_s) < 0) { wpa_supplicant_deauthenticate( wpa_s, WLAN_REASON_DEAUTH_LEAVING); return; } if (wpa_s->conf->ap_scan == 1 && wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION) { if (wpa_supplicant_assoc_update_ie(wpa_s) < 0) wpa_msg(wpa_s, MSG_WARNING, "WPA/RSN IEs not updated"); } } #ifdef CONFIG_SME os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN); wpa_s->sme.prev_bssid_set = 1; wpa_s->sme.last_unprot_disconnect.sec = 0; #endif /* CONFIG_SME */ wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid)); if (wpa_s->current_ssid) { /* When using scanning (ap_scan=1), SIM PC/SC interface can be * initialized before association, but for other modes, * initialize PC/SC here, if the current configuration needs * smartcard or SIM/USIM. */ wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid); } wpa_sm_notify_assoc(wpa_s->wpa, bssid); if (wpa_s->l2) l2_packet_notify_auth_start(wpa_s->l2); /* * Set portEnabled first to FALSE in order to get EAP state machine out * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE * state machine may transit to AUTHENTICATING state based on obsolete * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to * AUTHENTICATED without ever giving chance to EAP state machine to * reset the state. */ if (!ft_completed) { eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE); eapol_sm_notify_portValid(wpa_s->eapol, FALSE); } if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed) eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); /* 802.1X::portControl = Auto */ eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE); wpa_s->eapol_received = 0; if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE || (wpa_s->current_ssid && wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) { if (wpa_s->current_ssid && wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE)) { /* * Set the key after having received joined-IBSS event * from the driver. */ wpa_supplicant_set_wpa_none_key(wpa_s, wpa_s->current_ssid); } wpa_supplicant_cancel_auth_timeout(wpa_s); wpa_supplicant_set_state(wpa_s, WPA_COMPLETED); } else if (!ft_completed) { /* Timeout for receiving the first EAPOL packet */ wpa_supplicant_req_auth_timeout(wpa_s, 10, 0); } wpa_supplicant_cancel_scan(wpa_s); if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) && wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) { /* * We are done; the driver will take care of RSN 4-way * handshake. */ wpa_supplicant_cancel_auth_timeout(wpa_s); wpa_supplicant_set_state(wpa_s, WPA_COMPLETED); eapol_sm_notify_portValid(wpa_s->eapol, TRUE); eapol_sm_notify_eap_success(wpa_s->eapol, TRUE); } else if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) && wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) { /* * The driver will take care of RSN 4-way handshake, so we need * to allow EAPOL supplicant to complete its work without * waiting for WPA supplicant. */ eapol_sm_notify_portValid(wpa_s->eapol, TRUE); } else if (ft_completed) { /* * FT protocol completed - make sure EAPOL state machine ends * up in authenticated. */ wpa_supplicant_cancel_auth_timeout(wpa_s); wpa_supplicant_set_state(wpa_s, WPA_COMPLETED); eapol_sm_notify_portValid(wpa_s->eapol, TRUE); eapol_sm_notify_eap_success(wpa_s->eapol, TRUE); } wpa_s->last_eapol_matches_bssid = 0; if (wpa_s->pending_eapol_rx) { struct os_reltime now, age; os_get_reltime(&now); os_reltime_sub(&now, &wpa_s->pending_eapol_rx_time, &age); if (age.sec == 0 && age.usec < 100000 && os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) == 0) { wpa_dbg(wpa_s, MSG_DEBUG, "Process pending EAPOL " "frame that was received just before " "association notification"); wpa_supplicant_rx_eapol( wpa_s, wpa_s->pending_eapol_rx_src, wpabuf_head(wpa_s->pending_eapol_rx), wpabuf_len(wpa_s->pending_eapol_rx)); } wpabuf_free(wpa_s->pending_eapol_rx); wpa_s->pending_eapol_rx = NULL; } if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) && wpa_s->current_ssid && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE)) { /* Set static WEP keys again */ wpa_set_wep_keys(wpa_s, wpa_s->current_ssid); } #ifdef CONFIG_IBSS_RSN if (wpa_s->current_ssid && wpa_s->current_ssid->mode == WPAS_MODE_IBSS && wpa_s->key_mgmt != WPA_KEY_MGMT_NONE && wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE && wpa_s->ibss_rsn == NULL) { wpa_s->ibss_rsn = ibss_rsn_init(wpa_s); if (!wpa_s->ibss_rsn) { wpa_msg(wpa_s, MSG_INFO, "Failed to init IBSS RSN"); wpa_supplicant_deauthenticate( wpa_s, WLAN_REASON_DEAUTH_LEAVING); return; } ibss_rsn_set_psk(wpa_s->ibss_rsn, wpa_s->current_ssid->psk); } #endif /* CONFIG_IBSS_RSN */ wpas_wps_notify_assoc(wpa_s, bssid); } static int disconnect_reason_recoverable(u16 reason_code) { return reason_code == WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY || reason_code == WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA || reason_code == WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA; } static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s, u16 reason_code, int locally_generated) { const u8 *bssid; if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { /* * At least Host AP driver and a Prism3 card seemed to be * generating streams of disconnected events when configuring * IBSS for WPA-None. Ignore them for now. */ return; } bssid = wpa_s->bssid; if (is_zero_ether_addr(bssid)) bssid = wpa_s->pending_bssid; if (!is_zero_ether_addr(bssid) || wpa_s->wpa_state >= WPA_AUTHENTICATING) { wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR " reason=%d%s", MAC2STR(bssid), reason_code, locally_generated ? " locally_generated=1" : ""); } } static int could_be_psk_mismatch(struct wpa_supplicant *wpa_s, u16 reason_code, int locally_generated) { if (wpa_s->wpa_state != WPA_4WAY_HANDSHAKE || !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) return 0; /* Not in 4-way handshake with PSK */ /* * It looks like connection was lost while trying to go through PSK * 4-way handshake. Filter out known disconnection cases that are caused * by something else than PSK mismatch to avoid confusing reports. */ if (locally_generated) { if (reason_code == WLAN_REASON_IE_IN_4WAY_DIFFERS) return 0; } return 1; } static void wpa_supplicant_event_disassoc_finish(struct wpa_supplicant *wpa_s, u16 reason_code, int locally_generated) { const u8 *bssid; int authenticating; u8 prev_pending_bssid[ETH_ALEN]; struct wpa_bss *fast_reconnect = NULL; struct wpa_ssid *fast_reconnect_ssid = NULL; struct wpa_ssid *last_ssid; authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING; os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN); if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { /* * At least Host AP driver and a Prism3 card seemed to be * generating streams of disconnected events when configuring * IBSS for WPA-None. Ignore them for now. */ wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - ignore in " "IBSS/WPA-None mode"); return; } if (could_be_psk_mismatch(wpa_s, reason_code, locally_generated)) { wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - " "pre-shared key may be incorrect"); if (wpas_p2p_4way_hs_failed(wpa_s) > 0) return; /* P2P group removed */ wpas_auth_failed(wpa_s, "WRONG_KEY"); } if (!wpa_s->disconnected && (!wpa_s->auto_reconnect_disabled || wpa_s->key_mgmt == WPA_KEY_MGMT_WPS || wpas_wps_searching(wpa_s))) { wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect enabled: try to " "reconnect (wps=%d/%d wpa_state=%d)", wpa_s->key_mgmt == WPA_KEY_MGMT_WPS, wpas_wps_searching(wpa_s), wpa_s->wpa_state); if (wpa_s->wpa_state == WPA_COMPLETED && wpa_s->current_ssid && wpa_s->current_ssid->mode == WPAS_MODE_INFRA && !locally_generated && disconnect_reason_recoverable(reason_code)) { /* * It looks like the AP has dropped association with * us, but could allow us to get back in. Try to * reconnect to the same BSS without full scan to save * time for some common cases. */ fast_reconnect = wpa_s->current_bss; fast_reconnect_ssid = wpa_s->current_ssid; } else if (wpa_s->wpa_state >= WPA_ASSOCIATING) wpa_supplicant_req_scan(wpa_s, 0, 100000); else wpa_dbg(wpa_s, MSG_DEBUG, "Do not request new " "immediate scan"); } else { wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect disabled: do not " "try to re-connect"); wpa_s->reassociate = 0; wpa_s->disconnected = 1; wpa_supplicant_cancel_sched_scan(wpa_s); } bssid = wpa_s->bssid; if (is_zero_ether_addr(bssid)) bssid = wpa_s->pending_bssid; if (wpa_s->wpa_state >= WPA_AUTHENTICATING) wpas_connection_failed(wpa_s, bssid); wpa_sm_notify_disassoc(wpa_s->wpa); if (locally_generated) wpa_s->disconnect_reason = -reason_code; else wpa_s->disconnect_reason = reason_code; wpas_notify_disconnect_reason(wpa_s); if (wpa_supplicant_dynamic_keys(wpa_s)) { wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - remove keys"); wpa_clear_keys(wpa_s, wpa_s->bssid); } last_ssid = wpa_s->current_ssid; wpa_supplicant_mark_disassoc(wpa_s); if (authenticating && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) { sme_disassoc_while_authenticating(wpa_s, prev_pending_bssid); wpa_s->current_ssid = last_ssid; } if (fast_reconnect && !wpas_network_disabled(wpa_s, fast_reconnect_ssid) && !disallowed_bssid(wpa_s, fast_reconnect->bssid) && !disallowed_ssid(wpa_s, fast_reconnect->ssid, fast_reconnect->ssid_len) && !wpas_temp_disabled(wpa_s, fast_reconnect_ssid)) { #ifndef CONFIG_NO_SCAN_PROCESSING wpa_dbg(wpa_s, MSG_DEBUG, "Try to reconnect to the same BSS"); if (wpa_supplicant_connect(wpa_s, fast_reconnect, fast_reconnect_ssid) < 0) { /* Recover through full scan */ wpa_supplicant_req_scan(wpa_s, 0, 100000); } #endif /* CONFIG_NO_SCAN_PROCESSING */ } else if (fast_reconnect) { /* * Could not reconnect to the same BSS due to network being * disabled. Use a new scan to match the alternative behavior * above, i.e., to continue automatic reconnection attempt in a * way that enforces disabled network rules. */ wpa_supplicant_req_scan(wpa_s, 0, 100000); } } #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx, void *sock_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (!wpa_s->pending_mic_error_report) return; wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Sending pending MIC error report"); wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise); wpa_s->pending_mic_error_report = 0; } #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */ static void wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { int pairwise; struct os_reltime t; wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected"); pairwise = (data && data->michael_mic_failure.unicast); os_get_reltime(&t); if ((wpa_s->last_michael_mic_error.sec && !os_reltime_expired(&t, &wpa_s->last_michael_mic_error, 60)) || wpa_s->pending_mic_error_report) { if (wpa_s->pending_mic_error_report) { /* * Send the pending MIC error report immediately since * we are going to start countermeasures and AP better * do the same. */ wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise); } /* Send the new MIC error report immediately since we are going * to start countermeasures and AP better do the same. */ wpa_sm_key_request(wpa_s->wpa, 1, pairwise); /* initialize countermeasures */ wpa_s->countermeasures = 1; wpa_blacklist_add(wpa_s, wpa_s->bssid); wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started"); /* * Need to wait for completion of request frame. We do not get * any callback for the message completion, so just wait a * short while and hope for the best. */ os_sleep(0, 10000); wpa_drv_set_countermeasures(wpa_s, 1); wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_MICHAEL_MIC_FAILURE); eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, wpa_s, NULL); eloop_register_timeout(60, 0, wpa_supplicant_stop_countermeasures, wpa_s, NULL); /* TODO: mark the AP rejected for 60 second. STA is * allowed to associate with another AP.. */ } else { #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT if (wpa_s->mic_errors_seen) { /* * Reduce the effectiveness of Michael MIC error * reports as a means for attacking against TKIP if * more than one MIC failure is noticed with the same * PTK. We delay the transmission of the reports by a * random time between 0 and 60 seconds in order to * force the attacker wait 60 seconds before getting * the information on whether a frame resulted in a MIC * failure. */ u8 rval[4]; int sec; if (os_get_random(rval, sizeof(rval)) < 0) sec = os_random() % 60; else sec = WPA_GET_BE32(rval) % 60; wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Delay MIC error " "report %d seconds", sec); wpa_s->pending_mic_error_report = 1; wpa_s->pending_mic_error_pairwise = pairwise; eloop_cancel_timeout( wpa_supplicant_delayed_mic_error_report, wpa_s, NULL); eloop_register_timeout( sec, os_random() % 1000000, wpa_supplicant_delayed_mic_error_report, wpa_s, NULL); } else { wpa_sm_key_request(wpa_s->wpa, 1, pairwise); } #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */ wpa_sm_key_request(wpa_s->wpa, 1, pairwise); #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */ } wpa_s->last_michael_mic_error = t; wpa_s->mic_errors_seen++; } #ifdef CONFIG_TERMINATE_ONLASTIF static int any_interfaces(struct wpa_supplicant *head) { struct wpa_supplicant *wpa_s; for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next) if (!wpa_s->interface_removed) return 1; return 0; } #endif /* CONFIG_TERMINATE_ONLASTIF */ static void wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0) return; switch (data->interface_status.ievent) { case EVENT_INTERFACE_ADDED: if (!wpa_s->interface_removed) break; wpa_s->interface_removed = 0; wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was added"); if (wpa_supplicant_driver_init(wpa_s) < 0) { wpa_msg(wpa_s, MSG_INFO, "Failed to initialize the " "driver after interface was added"); } break; case EVENT_INTERFACE_REMOVED: wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was removed"); wpa_s->interface_removed = 1; wpa_supplicant_mark_disassoc(wpa_s); wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED); l2_packet_deinit(wpa_s->l2); wpa_s->l2 = NULL; #ifdef CONFIG_TERMINATE_ONLASTIF /* check if last interface */ if (!any_interfaces(wpa_s->global->ifaces)) eloop_terminate(); #endif /* CONFIG_TERMINATE_ONLASTIF */ break; } } #ifdef CONFIG_PEERKEY static void wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { if (data == NULL) return; wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer); } #endif /* CONFIG_PEERKEY */ #ifdef CONFIG_TDLS static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { if (data == NULL) return; switch (data->tdls.oper) { case TDLS_REQUEST_SETUP: wpa_tdls_remove(wpa_s->wpa, data->tdls.peer); if (wpa_tdls_is_external_setup(wpa_s->wpa)) wpa_tdls_start(wpa_s->wpa, data->tdls.peer); else wpa_drv_tdls_oper(wpa_s, TDLS_SETUP, data->tdls.peer); break; case TDLS_REQUEST_TEARDOWN: if (wpa_tdls_is_external_setup(wpa_s->wpa)) wpa_tdls_teardown_link(wpa_s->wpa, data->tdls.peer, data->tdls.reason_code); else wpa_drv_tdls_oper(wpa_s, TDLS_TEARDOWN, data->tdls.peer); break; } } #endif /* CONFIG_TDLS */ #ifdef CONFIG_WNM static void wpa_supplicant_event_wnm(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { if (data == NULL) return; switch (data->wnm.oper) { case WNM_OPER_SLEEP: wpa_printf(MSG_DEBUG, "Start sending WNM-Sleep Request " "(action=%d, intval=%d)", data->wnm.sleep_action, data->wnm.sleep_intval); ieee802_11_send_wnmsleep_req(wpa_s, data->wnm.sleep_action, data->wnm.sleep_intval, NULL); break; } } #endif /* CONFIG_WNM */ #ifdef CONFIG_IEEE80211R static void wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { if (data == NULL) return; if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies, data->ft_ies.ies_len, data->ft_ies.ft_action, data->ft_ies.target_ap, data->ft_ies.ric_ies, data->ft_ies.ric_ies_len) < 0) { /* TODO: prevent MLME/driver from trying to associate? */ } } #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IBSS_RSN static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { struct wpa_ssid *ssid; if (wpa_s->wpa_state < WPA_ASSOCIATED) return; if (data == NULL) return; ssid = wpa_s->current_ssid; if (ssid == NULL) return; if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt)) return; ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer); } static void wpa_supplicant_event_ibss_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { struct wpa_ssid *ssid = wpa_s->current_ssid; if (ssid == NULL) return; /* check if the ssid is correctly configured as IBSS/RSN */ if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt)) return; ibss_rsn_handle_auth(wpa_s->ibss_rsn, data->rx_mgmt.frame, data->rx_mgmt.frame_len); } #endif /* CONFIG_IBSS_RSN */ #ifdef CONFIG_IEEE80211R static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data, size_t len) { const u8 *sta_addr, *target_ap_addr; u16 status; wpa_hexdump(MSG_MSGDUMP, "FT: RX Action", data, len); if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) return; /* only SME case supported for now */ if (len < 1 + 2 * ETH_ALEN + 2) return; if (data[0] != 2) return; /* Only FT Action Response is supported for now */ sta_addr = data + 1; target_ap_addr = data + 1 + ETH_ALEN; status = WPA_GET_LE16(data + 1 + 2 * ETH_ALEN); wpa_dbg(wpa_s, MSG_DEBUG, "FT: Received FT Action Response: STA " MACSTR " TargetAP " MACSTR " status %u", MAC2STR(sta_addr), MAC2STR(target_ap_addr), status); if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) { wpa_dbg(wpa_s, MSG_DEBUG, "FT: Foreign STA Address " MACSTR " in FT Action Response", MAC2STR(sta_addr)); return; } if (status) { wpa_dbg(wpa_s, MSG_DEBUG, "FT: FT Action Response indicates " "failure (status code %d)", status); /* TODO: report error to FT code(?) */ return; } if (wpa_ft_process_response(wpa_s->wpa, data + 1 + 2 * ETH_ALEN + 2, len - (1 + 2 * ETH_ALEN + 2), 1, target_ap_addr, NULL, 0) < 0) return; #ifdef CONFIG_SME { struct wpa_bss *bss; bss = wpa_bss_get_bssid(wpa_s, target_ap_addr); if (bss) wpa_s->sme.freq = bss->freq; wpa_s->sme.auth_alg = WPA_AUTH_ALG_FT; sme_associate(wpa_s, WPAS_MODE_INFRA, target_ap_addr, WLAN_AUTH_FT); } #endif /* CONFIG_SME */ } #endif /* CONFIG_IEEE80211R */ static void wpa_supplicant_event_unprot_deauth(struct wpa_supplicant *wpa_s, struct unprot_deauth *e) { #ifdef CONFIG_IEEE80211W wpa_printf(MSG_DEBUG, "Unprotected Deauthentication frame " "dropped: " MACSTR " -> " MACSTR " (reason code %u)", MAC2STR(e->sa), MAC2STR(e->da), e->reason_code); sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code); #endif /* CONFIG_IEEE80211W */ } static void wpa_supplicant_event_unprot_disassoc(struct wpa_supplicant *wpa_s, struct unprot_disassoc *e) { #ifdef CONFIG_IEEE80211W wpa_printf(MSG_DEBUG, "Unprotected Disassociation frame " "dropped: " MACSTR " -> " MACSTR " (reason code %u)", MAC2STR(e->sa), MAC2STR(e->da), e->reason_code); sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code); #endif /* CONFIG_IEEE80211W */ } static void wpas_event_disconnect(struct wpa_supplicant *wpa_s, const u8 *addr, u16 reason_code, int locally_generated, const u8 *ie, size_t ie_len, int deauth) { #ifdef CONFIG_AP if (wpa_s->ap_iface && addr) { hostapd_notif_disassoc(wpa_s->ap_iface->bss[0], addr); return; } if (wpa_s->ap_iface) { wpa_dbg(wpa_s, MSG_DEBUG, "Ignore deauth event in AP mode"); return; } #endif /* CONFIG_AP */ wpa_supplicant_event_disassoc(wpa_s, reason_code, locally_generated); if (((reason_code == WLAN_REASON_IEEE_802_1X_AUTH_FAILED || ((wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) || (wpa_s->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) && eapol_sm_failed(wpa_s->eapol))) && !wpa_s->eap_expected_failure)) wpas_auth_failed(wpa_s, "AUTH_FAILED"); #ifdef CONFIG_P2P if (deauth && reason_code > 0) { if (wpas_p2p_deauth_notif(wpa_s, addr, reason_code, ie, ie_len, locally_generated) > 0) { /* * The interface was removed, so cannot continue * processing any additional operations after this. */ return; } } #endif /* CONFIG_P2P */ wpa_supplicant_event_disassoc_finish(wpa_s, reason_code, locally_generated); } static void wpas_event_disassoc(struct wpa_supplicant *wpa_s, struct disassoc_info *info) { u16 reason_code = 0; int locally_generated = 0; const u8 *addr = NULL; const u8 *ie = NULL; size_t ie_len = 0; wpa_dbg(wpa_s, MSG_DEBUG, "Disassociation notification"); if (info) { addr = info->addr; ie = info->ie; ie_len = info->ie_len; reason_code = info->reason_code; locally_generated = info->locally_generated; wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u%s", reason_code, locally_generated ? " (locally generated)" : ""); if (addr) wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR, MAC2STR(addr)); wpa_hexdump(MSG_DEBUG, "Disassociation frame IE(s)", ie, ie_len); } #ifdef CONFIG_AP if (wpa_s->ap_iface && info && info->addr) { hostapd_notif_disassoc(wpa_s->ap_iface->bss[0], info->addr); return; } if (wpa_s->ap_iface) { wpa_dbg(wpa_s, MSG_DEBUG, "Ignore disassoc event in AP mode"); return; } #endif /* CONFIG_AP */ #ifdef CONFIG_P2P if (info) { wpas_p2p_disassoc_notif( wpa_s, info->addr, reason_code, info->ie, info->ie_len, locally_generated); } #endif /* CONFIG_P2P */ if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) sme_event_disassoc(wpa_s, info); wpas_event_disconnect(wpa_s, addr, reason_code, locally_generated, ie, ie_len, 0); } static void wpas_event_deauth(struct wpa_supplicant *wpa_s, struct deauth_info *info) { u16 reason_code = 0; int locally_generated = 0; const u8 *addr = NULL; const u8 *ie = NULL; size_t ie_len = 0; wpa_dbg(wpa_s, MSG_DEBUG, "Deauthentication notification"); if (info) { addr = info->addr; ie = info->ie; ie_len = info->ie_len; reason_code = info->reason_code; locally_generated = info->locally_generated; wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u%s", reason_code, locally_generated ? " (locally generated)" : ""); if (addr) { wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR, MAC2STR(addr)); } wpa_hexdump(MSG_DEBUG, "Deauthentication frame IE(s)", ie, ie_len); } wpa_reset_ft_completed(wpa_s->wpa); wpas_event_disconnect(wpa_s, addr, reason_code, locally_generated, ie, ie_len, 1); } static const char * reg_init_str(enum reg_change_initiator init) { switch (init) { case REGDOM_SET_BY_CORE: return "CORE"; case REGDOM_SET_BY_USER: return "USER"; case REGDOM_SET_BY_DRIVER: return "DRIVER"; case REGDOM_SET_BY_COUNTRY_IE: return "COUNTRY_IE"; case REGDOM_BEACON_HINT: return "BEACON_HINT"; } return "?"; } static const char * reg_type_str(enum reg_type type) { switch (type) { case REGDOM_TYPE_UNKNOWN: return "UNKNOWN"; case REGDOM_TYPE_COUNTRY: return "COUNTRY"; case REGDOM_TYPE_WORLD: return "WORLD"; case REGDOM_TYPE_CUSTOM_WORLD: return "CUSTOM_WORLD"; case REGDOM_TYPE_INTERSECTION: return "INTERSECTION"; } return "?"; } static void wpa_supplicant_update_channel_list( struct wpa_supplicant *wpa_s, struct channel_list_changed *info) { struct wpa_supplicant *ifs; wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_REGDOM_CHANGE "init=%s type=%s%s%s", reg_init_str(info->initiator), reg_type_str(info->type), info->alpha2[0] ? " alpha2=" : "", info->alpha2[0] ? info->alpha2 : ""); if (wpa_s->drv_priv == NULL) return; /* Ignore event during drv initialization */ free_hw_features(wpa_s); wpa_s->hw.modes = wpa_drv_get_hw_feature_data( wpa_s, &wpa_s->hw.num_modes, &wpa_s->hw.flags); wpas_p2p_update_channel_list(wpa_s); /* * Check other interfaces to see if they share the same radio. If * so, they get updated with this same hw mode info. */ dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant, radio_list) { if (ifs != wpa_s) { wpa_printf(MSG_DEBUG, "%s: Updating hw mode", ifs->ifname); free_hw_features(ifs); ifs->hw.modes = wpa_drv_get_hw_feature_data( ifs, &ifs->hw.num_modes, &ifs->hw.flags); } } } static void wpas_event_rx_mgmt_action(struct wpa_supplicant *wpa_s, const u8 *frame, size_t len, int freq) { const struct ieee80211_mgmt *mgmt; const u8 *payload; size_t plen; u8 category; if (len < IEEE80211_HDRLEN + 2) return; mgmt = (const struct ieee80211_mgmt *) frame; payload = frame + IEEE80211_HDRLEN; category = *payload++; plen = len - IEEE80211_HDRLEN - 1; wpa_dbg(wpa_s, MSG_DEBUG, "Received Action frame: SA=" MACSTR " Category=%u DataLen=%d freq=%d MHz", MAC2STR(mgmt->sa), category, (int) plen, freq); #ifdef CONFIG_IEEE80211R if (category == WLAN_ACTION_FT) { ft_rx_action(wpa_s, payload, plen); return; } #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IEEE80211W #ifdef CONFIG_SME if (category == WLAN_ACTION_SA_QUERY) { sme_sa_query_rx(wpa_s, mgmt->sa, payload, plen); return; } #endif /* CONFIG_SME */ #endif /* CONFIG_IEEE80211W */ #ifdef CONFIG_WNM if (mgmt->u.action.category == WLAN_ACTION_WNM) { ieee802_11_rx_wnm_action(wpa_s, mgmt, len); return; } #endif /* CONFIG_WNM */ #ifdef CONFIG_GAS if ((mgmt->u.action.category == WLAN_ACTION_PUBLIC || mgmt->u.action.category == WLAN_ACTION_PROTECTED_DUAL) && gas_query_rx(wpa_s->gas, mgmt->da, mgmt->sa, mgmt->bssid, mgmt->u.action.category, payload, plen, freq) == 0) return; #endif /* CONFIG_GAS */ #ifdef CONFIG_TDLS if (category == WLAN_ACTION_PUBLIC && plen >= 4 && payload[0] == WLAN_TDLS_DISCOVERY_RESPONSE) { wpa_dbg(wpa_s, MSG_DEBUG, "TDLS: Received Discovery Response from " MACSTR, MAC2STR(mgmt->sa)); return; } #endif /* CONFIG_TDLS */ #ifdef CONFIG_INTERWORKING if (category == WLAN_ACTION_QOS && plen >= 1 && payload[0] == QOS_QOS_MAP_CONFIG) { const u8 *pos = payload + 1; size_t qlen = plen - 1; wpa_dbg(wpa_s, MSG_DEBUG, "Interworking: Received QoS Map Configure frame from " MACSTR, MAC2STR(mgmt->sa)); if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) == 0 && qlen > 2 && pos[0] == WLAN_EID_QOS_MAP_SET && pos[1] <= qlen - 2 && pos[1] >= 16) wpas_qos_map_set(wpa_s, pos + 2, pos[1]); return; } #endif /* CONFIG_INTERWORKING */ wpas_p2p_rx_action(wpa_s, mgmt->da, mgmt->sa, mgmt->bssid, category, payload, plen, freq); } static void wpa_supplicant_notify_avoid_freq(struct wpa_supplicant *wpa_s, union wpa_event_data *event) { #ifdef CONFIG_P2P struct wpa_supplicant *ifs; #endif /* CONFIG_P2P */ struct wpa_freq_range_list *list; char *str = NULL; list = &event->freq_range; if (list->num) str = freq_range_list_str(list); wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AVOID_FREQ "ranges=%s", str ? str : ""); #ifdef CONFIG_P2P if (freq_range_list_parse(&wpa_s->global->p2p_go_avoid_freq, str)) { wpa_dbg(wpa_s, MSG_ERROR, "%s: Failed to parse freq range", __func__); } else { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Update channel list based on frequency avoid event"); wpas_p2p_update_channel_list(wpa_s); } for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) { int freq; if (!ifs->current_ssid || !ifs->current_ssid->p2p_group || (ifs->current_ssid->mode != WPAS_MODE_P2P_GO && ifs->current_ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION)) continue; freq = ifs->current_ssid->frequency; if (!freq_range_list_includes(list, freq)) { wpa_dbg(ifs, MSG_DEBUG, "P2P GO operating frequency %d MHz in safe range", freq); continue; } wpa_dbg(ifs, MSG_DEBUG, "P2P GO operating in unsafe frequency %d MHz", freq); /* TODO: Consider using CSA or removing the group within * wpa_supplicant */ wpa_msg(ifs, MSG_INFO, P2P_EVENT_REMOVE_AND_REFORM_GROUP); } #endif /* CONFIG_P2P */ os_free(str); } void wpa_supplicant_event(void *ctx, enum wpa_event_type event, union wpa_event_data *data) { struct wpa_supplicant *wpa_s = ctx; if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED && event != EVENT_INTERFACE_ENABLED && event != EVENT_INTERFACE_STATUS && event != EVENT_SCHED_SCAN_STOPPED) { wpa_dbg(wpa_s, MSG_DEBUG, "Ignore event %s (%d) while interface is disabled", event_to_string(event), event); return; } #ifndef CONFIG_NO_STDOUT_DEBUG { int level = MSG_DEBUG; if (event == EVENT_RX_MGMT && data->rx_mgmt.frame_len >= 24) { const struct ieee80211_hdr *hdr; u16 fc; hdr = (const struct ieee80211_hdr *) data->rx_mgmt.frame; fc = le_to_host16(hdr->frame_control); if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT && WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON) level = MSG_EXCESSIVE; } wpa_dbg(wpa_s, level, "Event %s (%d) received", event_to_string(event), event); } #endif /* CONFIG_NO_STDOUT_DEBUG */ switch (event) { case EVENT_AUTH: sme_event_auth(wpa_s, data); break; case EVENT_ASSOC: wpa_supplicant_event_assoc(wpa_s, data); break; case EVENT_DISASSOC: wpas_event_disassoc(wpa_s, data ? &data->disassoc_info : NULL); break; case EVENT_DEAUTH: wpas_event_deauth(wpa_s, data ? &data->deauth_info : NULL); break; case EVENT_MICHAEL_MIC_FAILURE: wpa_supplicant_event_michael_mic_failure(wpa_s, data); break; #ifndef CONFIG_NO_SCAN_PROCESSING case EVENT_SCAN_STARTED: os_get_reltime(&wpa_s->scan_start_time); if (wpa_s->own_scan_requested) { struct os_reltime diff; os_reltime_sub(&wpa_s->scan_start_time, &wpa_s->scan_trigger_time, &diff); wpa_dbg(wpa_s, MSG_DEBUG, "Own scan request started a scan in %ld.%06ld seconds", diff.sec, diff.usec); wpa_s->own_scan_requested = 0; wpa_s->own_scan_running = 1; if (wpa_s->last_scan_req == MANUAL_SCAN_REQ && wpa_s->manual_scan_use_id) { wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_STARTED "id=%u", wpa_s->manual_scan_id); } else { wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_STARTED); } } else { wpa_dbg(wpa_s, MSG_DEBUG, "External program started a scan"); wpa_s->external_scan_running = 1; wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_STARTED); } break; case EVENT_SCAN_RESULTS: if (os_reltime_initialized(&wpa_s->scan_start_time)) { struct os_reltime now, diff; os_get_reltime(&now); os_reltime_sub(&now, &wpa_s->scan_start_time, &diff); wpa_s->scan_start_time.sec = 0; wpa_s->scan_start_time.usec = 0; wpa_dbg(wpa_s, MSG_DEBUG, "Scan completed in %ld.%06ld seconds", diff.sec, diff.usec); } wpa_supplicant_event_scan_results(wpa_s, data); wpa_s->own_scan_running = 0; wpa_s->external_scan_running = 0; radio_work_check_next(wpa_s); break; #endif /* CONFIG_NO_SCAN_PROCESSING */ case EVENT_ASSOCINFO: wpa_supplicant_event_associnfo(wpa_s, data); break; case EVENT_INTERFACE_STATUS: wpa_supplicant_event_interface_status(wpa_s, data); break; case EVENT_PMKID_CANDIDATE: wpa_supplicant_event_pmkid_candidate(wpa_s, data); break; #ifdef CONFIG_PEERKEY case EVENT_STKSTART: wpa_supplicant_event_stkstart(wpa_s, data); break; #endif /* CONFIG_PEERKEY */ #ifdef CONFIG_TDLS case EVENT_TDLS: wpa_supplicant_event_tdls(wpa_s, data); break; #endif /* CONFIG_TDLS */ #ifdef CONFIG_WNM case EVENT_WNM: wpa_supplicant_event_wnm(wpa_s, data); break; #endif /* CONFIG_WNM */ #ifdef CONFIG_IEEE80211R case EVENT_FT_RESPONSE: wpa_supplicant_event_ft_response(wpa_s, data); break; #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IBSS_RSN case EVENT_IBSS_RSN_START: wpa_supplicant_event_ibss_rsn_start(wpa_s, data); break; #endif /* CONFIG_IBSS_RSN */ case EVENT_ASSOC_REJECT: if (data->assoc_reject.bssid) wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT "bssid=" MACSTR " status_code=%u", MAC2STR(data->assoc_reject.bssid), data->assoc_reject.status_code); else wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT "status_code=%u", data->assoc_reject.status_code); if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) sme_event_assoc_reject(wpa_s, data); else { const u8 *bssid = data->assoc_reject.bssid; if (bssid == NULL || is_zero_ether_addr(bssid)) bssid = wpa_s->pending_bssid; wpas_connection_failed(wpa_s, bssid); wpa_supplicant_mark_disassoc(wpa_s); } break; case EVENT_AUTH_TIMED_OUT: if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) sme_event_auth_timed_out(wpa_s, data); break; case EVENT_ASSOC_TIMED_OUT: if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) sme_event_assoc_timed_out(wpa_s, data); break; case EVENT_TX_STATUS: wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS dst=" MACSTR " type=%d stype=%d", MAC2STR(data->tx_status.dst), data->tx_status.type, data->tx_status.stype); #ifdef CONFIG_AP if (wpa_s->ap_iface == NULL) { #ifdef CONFIG_OFFCHANNEL if (data->tx_status.type == WLAN_FC_TYPE_MGMT && data->tx_status.stype == WLAN_FC_STYPE_ACTION) offchannel_send_action_tx_status( wpa_s, data->tx_status.dst, data->tx_status.data, data->tx_status.data_len, data->tx_status.ack ? OFFCHANNEL_SEND_ACTION_SUCCESS : OFFCHANNEL_SEND_ACTION_NO_ACK); #endif /* CONFIG_OFFCHANNEL */ break; } #endif /* CONFIG_AP */ #ifdef CONFIG_OFFCHANNEL wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS pending_dst=" MACSTR, MAC2STR(wpa_s->parent->pending_action_dst)); /* * Catch TX status events for Action frames we sent via group * interface in GO mode. */ if (data->tx_status.type == WLAN_FC_TYPE_MGMT && data->tx_status.stype == WLAN_FC_STYPE_ACTION && os_memcmp(wpa_s->parent->pending_action_dst, data->tx_status.dst, ETH_ALEN) == 0) { offchannel_send_action_tx_status( wpa_s->parent, data->tx_status.dst, data->tx_status.data, data->tx_status.data_len, data->tx_status.ack ? OFFCHANNEL_SEND_ACTION_SUCCESS : OFFCHANNEL_SEND_ACTION_NO_ACK); break; } #endif /* CONFIG_OFFCHANNEL */ #ifdef CONFIG_AP switch (data->tx_status.type) { case WLAN_FC_TYPE_MGMT: ap_mgmt_tx_cb(wpa_s, data->tx_status.data, data->tx_status.data_len, data->tx_status.stype, data->tx_status.ack); break; case WLAN_FC_TYPE_DATA: ap_tx_status(wpa_s, data->tx_status.dst, data->tx_status.data, data->tx_status.data_len, data->tx_status.ack); break; } #endif /* CONFIG_AP */ break; #ifdef CONFIG_AP case EVENT_EAPOL_TX_STATUS: ap_eapol_tx_status(wpa_s, data->eapol_tx_status.dst, data->eapol_tx_status.data, data->eapol_tx_status.data_len, data->eapol_tx_status.ack); break; case EVENT_DRIVER_CLIENT_POLL_OK: ap_client_poll_ok(wpa_s, data->client_poll.addr); break; case EVENT_RX_FROM_UNKNOWN: if (wpa_s->ap_iface == NULL) break; ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.addr, data->rx_from_unknown.wds); break; case EVENT_CH_SWITCH: if (!data) break; if (!wpa_s->ap_iface) { wpa_dbg(wpa_s, MSG_DEBUG, "AP: Ignore channel switch " "event in non-AP mode"); break; } wpas_ap_ch_switch(wpa_s, data->ch_switch.freq, data->ch_switch.ht_enabled, data->ch_switch.ch_offset, data->ch_switch.ch_width, data->ch_switch.cf1, data->ch_switch.cf2); break; #endif /* CONFIG_AP */ case EVENT_RX_MGMT: { u16 fc, stype; const struct ieee80211_mgmt *mgmt; #ifdef CONFIG_TESTING_OPTIONS if (wpa_s->ext_mgmt_frame_handling) { struct rx_mgmt *rx = &data->rx_mgmt; size_t hex_len = 2 * rx->frame_len + 1; char *hex = os_malloc(hex_len); if (hex) { wpa_snprintf_hex(hex, hex_len, rx->frame, rx->frame_len); wpa_msg(wpa_s, MSG_INFO, "MGMT-RX freq=%d datarate=%u ssi_signal=%d %s", rx->freq, rx->datarate, rx->ssi_signal, hex); os_free(hex); } break; } #endif /* CONFIG_TESTING_OPTIONS */ mgmt = (const struct ieee80211_mgmt *) data->rx_mgmt.frame; fc = le_to_host16(mgmt->frame_control); stype = WLAN_FC_GET_STYPE(fc); #ifdef CONFIG_AP if (wpa_s->ap_iface == NULL) { #endif /* CONFIG_AP */ #ifdef CONFIG_P2P if (stype == WLAN_FC_STYPE_PROBE_REQ && data->rx_mgmt.frame_len > 24) { const u8 *src = mgmt->sa; const u8 *ie = mgmt->u.probe_req.variable; size_t ie_len = data->rx_mgmt.frame_len - (mgmt->u.probe_req.variable - data->rx_mgmt.frame); wpas_p2p_probe_req_rx( wpa_s, src, mgmt->da, mgmt->bssid, ie, ie_len, data->rx_mgmt.ssi_signal); break; } #endif /* CONFIG_P2P */ #ifdef CONFIG_IBSS_RSN if (stype == WLAN_FC_STYPE_AUTH && data->rx_mgmt.frame_len >= 30) { wpa_supplicant_event_ibss_auth(wpa_s, data); break; } #endif /* CONFIG_IBSS_RSN */ if (stype == WLAN_FC_STYPE_ACTION) { wpas_event_rx_mgmt_action( wpa_s, data->rx_mgmt.frame, data->rx_mgmt.frame_len, data->rx_mgmt.freq); break; } wpa_dbg(wpa_s, MSG_DEBUG, "AP: ignore received " "management frame in non-AP mode"); break; #ifdef CONFIG_AP } if (stype == WLAN_FC_STYPE_PROBE_REQ && data->rx_mgmt.frame_len > 24) { const u8 *ie = mgmt->u.probe_req.variable; size_t ie_len = data->rx_mgmt.frame_len - (mgmt->u.probe_req.variable - data->rx_mgmt.frame); wpas_notify_preq(wpa_s, mgmt->sa, mgmt->da, mgmt->bssid, ie, ie_len, data->rx_mgmt.ssi_signal); } ap_mgmt_rx(wpa_s, &data->rx_mgmt); #endif /* CONFIG_AP */ break; } case EVENT_RX_PROBE_REQ: if (data->rx_probe_req.sa == NULL || data->rx_probe_req.ie == NULL) break; #ifdef CONFIG_AP if (wpa_s->ap_iface) { hostapd_probe_req_rx(wpa_s->ap_iface->bss[0], data->rx_probe_req.sa, data->rx_probe_req.da, data->rx_probe_req.bssid, data->rx_probe_req.ie, data->rx_probe_req.ie_len, data->rx_probe_req.ssi_signal); break; } #endif /* CONFIG_AP */ wpas_p2p_probe_req_rx(wpa_s, data->rx_probe_req.sa, data->rx_probe_req.da, data->rx_probe_req.bssid, data->rx_probe_req.ie, data->rx_probe_req.ie_len, data->rx_probe_req.ssi_signal); break; case EVENT_REMAIN_ON_CHANNEL: #ifdef CONFIG_OFFCHANNEL offchannel_remain_on_channel_cb( wpa_s, data->remain_on_channel.freq, data->remain_on_channel.duration); #endif /* CONFIG_OFFCHANNEL */ wpas_p2p_remain_on_channel_cb( wpa_s, data->remain_on_channel.freq, data->remain_on_channel.duration); break; case EVENT_CANCEL_REMAIN_ON_CHANNEL: #ifdef CONFIG_OFFCHANNEL offchannel_cancel_remain_on_channel_cb( wpa_s, data->remain_on_channel.freq); #endif /* CONFIG_OFFCHANNEL */ wpas_p2p_cancel_remain_on_channel_cb( wpa_s, data->remain_on_channel.freq); break; case EVENT_EAPOL_RX: wpa_supplicant_rx_eapol(wpa_s, data->eapol_rx.src, data->eapol_rx.data, data->eapol_rx.data_len); break; case EVENT_SIGNAL_CHANGE: wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SIGNAL_CHANGE "above=%d signal=%d noise=%d txrate=%d", data->signal_change.above_threshold, data->signal_change.current_signal, data->signal_change.current_noise, data->signal_change.current_txrate); bgscan_notify_signal_change( wpa_s, data->signal_change.above_threshold, data->signal_change.current_signal, data->signal_change.current_noise, data->signal_change.current_txrate); break; case EVENT_INTERFACE_ENABLED: wpa_dbg(wpa_s, MSG_DEBUG, "Interface was enabled"); if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) { wpa_supplicant_update_mac_addr(wpa_s); if (wpa_s->p2p_mgmt) { wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); break; } #ifdef CONFIG_AP if (!wpa_s->ap_iface) { wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); wpa_supplicant_req_scan(wpa_s, 0, 0); } else wpa_supplicant_set_state(wpa_s, WPA_COMPLETED); #else /* CONFIG_AP */ wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); wpa_supplicant_req_scan(wpa_s, 0, 0); #endif /* CONFIG_AP */ } break; case EVENT_INTERFACE_DISABLED: wpa_dbg(wpa_s, MSG_DEBUG, "Interface was disabled"); #ifdef CONFIG_P2P if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_GO || (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group && wpa_s->current_ssid->mode == WPAS_MODE_P2P_GO)) { /* * The interface was externally disabled. Remove * it assuming an external entity will start a * new session if needed. */ wpas_p2p_disconnect(wpa_s); break; } if (wpa_s->p2p_scan_work && wpa_s->global->p2p && p2p_in_progress(wpa_s->global->p2p) > 1) { /* This radio work will be cancelled, so clear P2P * state as well. */ p2p_stop_find(wpa_s->global->p2p); } #endif /* CONFIG_P2P */ if (wpa_s->wpa_state >= WPA_AUTHENTICATING) { /* * Indicate disconnection to keep ctrl_iface events * consistent. */ wpa_supplicant_event_disassoc( wpa_s, WLAN_REASON_DEAUTH_LEAVING, 1); } wpa_supplicant_mark_disassoc(wpa_s); radio_remove_works(wpa_s, NULL, 0); wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED); break; case EVENT_CHANNEL_LIST_CHANGED: wpa_supplicant_update_channel_list( wpa_s, &data->channel_list_changed); break; case EVENT_INTERFACE_UNAVAILABLE: wpas_p2p_interface_unavailable(wpa_s); break; case EVENT_BEST_CHANNEL: wpa_dbg(wpa_s, MSG_DEBUG, "Best channel event received " "(%d %d %d)", data->best_chan.freq_24, data->best_chan.freq_5, data->best_chan.freq_overall); wpa_s->best_24_freq = data->best_chan.freq_24; wpa_s->best_5_freq = data->best_chan.freq_5; wpa_s->best_overall_freq = data->best_chan.freq_overall; wpas_p2p_update_best_channels(wpa_s, data->best_chan.freq_24, data->best_chan.freq_5, data->best_chan.freq_overall); break; case EVENT_UNPROT_DEAUTH: wpa_supplicant_event_unprot_deauth(wpa_s, &data->unprot_deauth); break; case EVENT_UNPROT_DISASSOC: wpa_supplicant_event_unprot_disassoc(wpa_s, &data->unprot_disassoc); break; case EVENT_STATION_LOW_ACK: #ifdef CONFIG_AP if (wpa_s->ap_iface && data) hostapd_event_sta_low_ack(wpa_s->ap_iface->bss[0], data->low_ack.addr); #endif /* CONFIG_AP */ #ifdef CONFIG_TDLS if (data) wpa_tdls_disable_unreachable_link(wpa_s->wpa, data->low_ack.addr); #endif /* CONFIG_TDLS */ break; case EVENT_IBSS_PEER_LOST: #ifdef CONFIG_IBSS_RSN ibss_rsn_stop(wpa_s->ibss_rsn, data->ibss_peer_lost.peer); #endif /* CONFIG_IBSS_RSN */ break; case EVENT_DRIVER_GTK_REKEY: if (os_memcmp(data->driver_gtk_rekey.bssid, wpa_s->bssid, ETH_ALEN)) break; if (!wpa_s->wpa) break; wpa_sm_update_replay_ctr(wpa_s->wpa, data->driver_gtk_rekey.replay_ctr); break; case EVENT_SCHED_SCAN_STOPPED: wpa_s->pno = 0; wpa_s->sched_scanning = 0; wpa_supplicant_notify_scanning(wpa_s, 0); if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) break; /* * Start a new sched scan to continue searching for more SSIDs * either if timed out or PNO schedule scan is pending. */ if (wpa_s->sched_scan_timed_out) { wpa_supplicant_req_sched_scan(wpa_s); } else if (wpa_s->pno_sched_pending) { wpa_s->pno_sched_pending = 0; wpas_start_pno(wpa_s); } break; case EVENT_WPS_BUTTON_PUSHED: #ifdef CONFIG_WPS wpas_wps_start_pbc(wpa_s, NULL, 0); #endif /* CONFIG_WPS */ break; case EVENT_AVOID_FREQUENCIES: wpa_supplicant_notify_avoid_freq(wpa_s, data); break; case EVENT_CONNECT_FAILED_REASON: #ifdef CONFIG_AP if (!wpa_s->ap_iface || !data) break; hostapd_event_connect_failed_reason( wpa_s->ap_iface->bss[0], data->connect_failed_reason.addr, data->connect_failed_reason.code); #endif /* CONFIG_AP */ break; default: wpa_msg(wpa_s, MSG_INFO, "Unknown event %d", event); break; } }