/* * wpa_supplicant - SME * Copyright (c) 2009-2014, 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 "utils/eloop.h" #include "common/ieee802_11_defs.h" #include "common/ieee802_11_common.h" #include "common/ocv.h" #include "eapol_supp/eapol_supp_sm.h" #include "common/wpa_common.h" #include "common/sae.h" #include "common/dpp.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); static void sme_stop_sa_query(struct wpa_supplicant *wpa_s); #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, 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); wpa_s->sme.sae.akmp = wpa_s->key_mgmt; 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, int external, int reuse, int *ret_use_pt, bool *ret_use_pk) { struct wpabuf *buf; size_t len; const char *password; struct wpa_bss *bss; int use_pt = 0; bool use_pk = false; u8 rsnxe_capa = 0; if (ret_use_pt) *ret_use_pt = 0; if (ret_use_pk) *ret_use_pk = false; #ifdef CONFIG_TESTING_OPTIONS if (wpa_s->sae_commit_override) { wpa_printf(MSG_DEBUG, "SAE: TESTING - commit override"); buf = wpabuf_alloc(4 + wpabuf_len(wpa_s->sae_commit_override)); if (!buf) return NULL; if (!external) { wpabuf_put_le16(buf, 1); /* Transaction seq# */ wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS); } wpabuf_put_buf(buf, wpa_s->sae_commit_override); return buf; } #endif /* CONFIG_TESTING_OPTIONS */ password = ssid->sae_password; if (!password) password = ssid->passphrase; if (!password) { wpa_printf(MSG_DEBUG, "SAE: No password available"); return NULL; } if (reuse && wpa_s->sme.sae.tmp && os_memcmp(bssid, wpa_s->sme.sae.tmp->bssid, ETH_ALEN) == 0) { wpa_printf(MSG_DEBUG, "SAE: Reuse previously generated PWE on a retry with the same AP"); use_pt = wpa_s->sme.sae.h2e; use_pk = wpa_s->sme.sae.pk; goto reuse_data; } if (sme_set_sae_group(wpa_s) < 0) { wpa_printf(MSG_DEBUG, "SAE: Failed to select group"); return NULL; } bss = wpa_bss_get_bssid_latest(wpa_s, bssid); if (!bss) { wpa_printf(MSG_DEBUG, "SAE: BSS not available, update scan result to get BSS"); wpa_supplicant_update_scan_results(wpa_s); bss = wpa_bss_get_bssid_latest(wpa_s, bssid); } if (bss) { const u8 *rsnxe; rsnxe = wpa_bss_get_ie(bss, WLAN_EID_RSNX); if (rsnxe && rsnxe[1] >= 1) rsnxe_capa = rsnxe[2]; } if (ssid->sae_password_id && wpa_s->conf->sae_pwe != 3) use_pt = 1; if (wpa_key_mgmt_sae_ext_key(wpa_s->key_mgmt) && wpa_s->conf->sae_pwe != 3) use_pt = 1; #ifdef CONFIG_SAE_PK if ((rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_PK)) && ssid->sae_pk != SAE_PK_MODE_DISABLED && ((ssid->sae_password && sae_pk_valid_password(ssid->sae_password)) || (!ssid->sae_password && ssid->passphrase && sae_pk_valid_password(ssid->passphrase)))) { use_pt = 1; use_pk = true; } if (ssid->sae_pk == SAE_PK_MODE_ONLY && !use_pk) { wpa_printf(MSG_DEBUG, "SAE: Cannot use PK with the selected AP"); return NULL; } #endif /* CONFIG_SAE_PK */ if (use_pt || wpa_s->conf->sae_pwe == 1 || wpa_s->conf->sae_pwe == 2) { use_pt = !!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_H2E)); if ((wpa_s->conf->sae_pwe == 1 || ssid->sae_password_id || wpa_key_mgmt_sae_ext_key(wpa_s->key_mgmt)) && wpa_s->conf->sae_pwe != 3 && !use_pt) { wpa_printf(MSG_DEBUG, "SAE: Cannot use H2E with the selected AP"); return NULL; } } if (use_pt && sae_prepare_commit_pt(&wpa_s->sme.sae, ssid->pt, wpa_s->own_addr, bssid, wpa_s->sme.sae_rejected_groups, NULL) < 0) return NULL; if (!use_pt && sae_prepare_commit(wpa_s->own_addr, bssid, (u8 *) password, os_strlen(password), &wpa_s->sme.sae) < 0) { wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE"); return NULL; } if (wpa_s->sme.sae.tmp) { os_memcpy(wpa_s->sme.sae.tmp->bssid, bssid, ETH_ALEN); if (use_pt && use_pk) wpa_s->sme.sae.pk = 1; #ifdef CONFIG_SAE_PK os_memcpy(wpa_s->sme.sae.tmp->own_addr, wpa_s->own_addr, ETH_ALEN); os_memcpy(wpa_s->sme.sae.tmp->peer_addr, bssid, ETH_ALEN); sae_pk_set_password(&wpa_s->sme.sae, password); #endif /* CONFIG_SAE_PK */ } reuse_data: len = wpa_s->sme.sae_token ? 3 + wpabuf_len(wpa_s->sme.sae_token) : 0; if (ssid->sae_password_id) len += 4 + os_strlen(ssid->sae_password_id); buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len); if (buf == NULL) return NULL; if (!external) { wpabuf_put_le16(buf, 1); /* Transaction seq# */ if (use_pk) wpabuf_put_le16(buf, WLAN_STATUS_SAE_PK); else if (use_pt) wpabuf_put_le16(buf, WLAN_STATUS_SAE_HASH_TO_ELEMENT); else wpabuf_put_le16(buf,WLAN_STATUS_SUCCESS); } if (sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token, ssid->sae_password_id) < 0) { wpabuf_free(buf); return NULL; } if (ret_use_pt) *ret_use_pt = use_pt; if (ret_use_pk) *ret_use_pk = use_pk; return buf; } static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s, int external) { struct wpabuf *buf; buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN); if (buf == NULL) return NULL; if (!external) { 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_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_RRM)) { 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 capabilities flags */ if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION) *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT; *pos |= WLAN_RRM_CAPS_BEACON_REPORT_PASSIVE | WLAN_RRM_CAPS_BEACON_REPORT_ACTIVE | WLAN_RRM_CAPS_BEACON_REPORT_TABLE; if (wpa_s->lci) pos[1] |= WLAN_RRM_CAPS_LCI_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 */ #if defined(CONFIG_IEEE80211R) || defined(CONFIG_FILS) const u8 *md = NULL; #endif /* CONFIG_IEEE80211R || CONFIG_FILS */ int bssid_changed; struct wpabuf *resp = NULL; u8 ext_capab[18]; int ext_capab_len; int skip_auth; u8 *wpa_ie; size_t wpa_ie_len; #ifdef CONFIG_MBO const u8 *mbo_ie; #endif /* CONFIG_MBO */ int omit_rsnxe = 0; 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"); #ifdef CONFIG_DPP } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 && (ssid->key_mgmt & WPA_KEY_MGMT_DPP) && (ied.key_mgmt & WPA_KEY_MGMT_DPP)) { wpa_dbg(wpa_s, MSG_DEBUG, "Prefer DPP over SAE when both are enabled"); #endif /* CONFIG_DPP */ } 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 */ #ifdef CONFIG_WEP { int i; 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; } #endif /* CONFIG_WEP */ 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; const u8 *cache_id = NULL; try_opportunistic = (ssid->proactive_key_caching < 0 ? wpa_s->conf->okc : ssid->proactive_key_caching) && (ssid->proto & WPA_PROTO_RSN); #ifdef CONFIG_FILS if (wpa_key_mgmt_fils(ssid->key_mgmt)) cache_id = wpa_bss_get_fils_cache_id(bss); #endif /* CONFIG_FILS */ if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, wpa_s->current_ssid, try_opportunistic, cache_id, 0) == 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; } #ifdef CONFIG_HS20 } else if (wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE) && (ssid->key_mgmt & WPA_KEY_MGMT_OSEN)) { /* No PMKSA caching, but otherwise similar to RSN/WPA */ 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; } #endif /* CONFIG_HS20 */ } 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; } /* In case the WPA vendor IE is used, it should be placed after all the * non-vendor IEs, as the lower layer expects the IEs to be ordered as * defined in the standard. Store the WPA IE so it can later be * inserted at the correct location. */ wpa_ie = NULL; wpa_ie_len = 0; if (wpa_s->wpa_proto == WPA_PROTO_WPA) { wpa_ie = os_memdup(wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); if (wpa_ie) { wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Storing WPA IE"); wpa_ie_len = wpa_s->sme.assoc_req_ie_len; wpa_s->sme.assoc_req_ie_len = 0; } else { wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed copy WPA IE"); wpas_connect_work_done(wpa_s); return; } } #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 && (!wpa_key_mgmt_ft(ssid->key_mgmt) || !wpa_key_mgmt_ft(wpa_s->key_mgmt))) md = NULL; if (md) { /* Prepare for the next transition */ wpa_ft_prepare_auth_request(wpa_s->wpa, ie); } if (md) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: FT mobility domain %02x%02x", md[0], md[1]); omit_rsnxe = !wpa_bss_get_ie(bss, WLAN_EID_RSNX); 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.prev_bssid_set && 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 */ 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; } } #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); wpa_s->sme.assoc_req_ie_len += wpas_supp_op_class_ie( wpa_s, ssid, bss, 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 (params.p2p) wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT); else wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION); 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_TESTING_OPTIONS if (wpa_s->rsnxe_override_assoc && wpabuf_len(wpa_s->rsnxe_override_assoc) <= sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len) { wpa_printf(MSG_DEBUG, "TESTING: RSNXE AssocReq override"); os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpabuf_head(wpa_s->rsnxe_override_assoc), wpabuf_len(wpa_s->rsnxe_override_assoc)); wpa_s->sme.assoc_req_ie_len += wpabuf_len(wpa_s->rsnxe_override_assoc); } else #endif /* CONFIG_TESTING_OPTIONS */ if (wpa_s->rsnxe_len > 0 && wpa_s->rsnxe_len <= sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len && !omit_rsnxe) { os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpa_s->rsnxe, wpa_s->rsnxe_len); wpa_s->sme.assoc_req_ie_len += wpa_s->rsnxe_len; } #ifdef CONFIG_HS20 if (is_hs20_network(wpa_s, ssid, bss)) { struct wpabuf *hs20; hs20 = wpabuf_alloc(20 + MAX_ROAMING_CONS_OI_LEN); 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, get_hs20_version(bss)); wpas_hs20_add_roam_cons_sel(hs20, ssid); 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_ie) { size_t len; wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Reinsert WPA IE"); len = sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len; if (len > wpa_ie_len) { os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpa_ie, wpa_ie_len); wpa_s->sme.assoc_req_ie_len += wpa_ie_len; } else { wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Failed to add WPA IE"); } os_free(wpa_ie); } 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 mbo_ie = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE); if (!wpa_s->disable_mbo_oce && mbo_ie) { 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, !!mbo_attr_from_mbo_ie(mbo_ie, OCE_ATTR_ID_CAPA_IND)); 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, NULL, wpa_key_mgmt_sae(wpa_s->key_mgmt) ? wpa_s->key_mgmt : (int) WPA_KEY_MGMT_SAE) == 0) { wpa_dbg(wpa_s, MSG_DEBUG, "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication"); wpa_sm_set_pmk_from_pmksa(wpa_s->wpa); 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, 0, start == 2, NULL, NULL); else resp = sme_auth_build_sae_confirm(wpa_s, 0); if (resp == NULL) { wpas_connection_failed(wpa_s, bss->bssid); return; } params.auth_data = wpabuf_head(resp); params.auth_data_len = wpabuf_len(resp); wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED; } #endif /* CONFIG_SAE */ 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); 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); #ifdef CONFIG_FILS /* TODO: FILS operations can in some cases be done between different * network_ctx (i.e., same credentials can be used with multiple * networks). */ if (params.auth_alg == WPA_AUTH_ALG_OPEN && wpa_key_mgmt_fils(ssid->key_mgmt)) { const u8 *indic; u16 fils_info; const u8 *realm, *username, *rrk; size_t realm_len, username_len, rrk_len; u16 next_seq_num; /* * Check FILS Indication element (FILS Information field) bits * indicating supported authentication algorithms against local * configuration (ssid->fils_dh_group). Try to use FILS * authentication only if the AP supports the combination in the * network profile. */ indic = wpa_bss_get_ie(bss, WLAN_EID_FILS_INDICATION); if (!indic || indic[1] < 2) { wpa_printf(MSG_DEBUG, "SME: " MACSTR " does not include FILS Indication element - cannot use FILS authentication with it", MAC2STR(bss->bssid)); goto no_fils; } fils_info = WPA_GET_LE16(indic + 2); if (ssid->fils_dh_group == 0 && !(fils_info & BIT(9))) { wpa_printf(MSG_DEBUG, "SME: " MACSTR " does not support FILS SK without PFS - cannot use FILS authentication with it", MAC2STR(bss->bssid)); goto no_fils; } if (ssid->fils_dh_group != 0 && !(fils_info & BIT(10))) { wpa_printf(MSG_DEBUG, "SME: " MACSTR " does not support FILS SK with PFS - cannot use FILS authentication with it", MAC2STR(bss->bssid)); goto no_fils; } if (wpa_s->last_con_fail_realm && eapol_sm_get_erp_info(wpa_s->eapol, &ssid->eap, &username, &username_len, &realm, &realm_len, &next_seq_num, &rrk, &rrk_len) == 0 && realm && realm_len == wpa_s->last_con_fail_realm_len && os_memcmp(realm, wpa_s->last_con_fail_realm, realm_len) == 0) { wpa_printf(MSG_DEBUG, "SME: FILS authentication for this realm failed last time - try to regenerate ERP key hierarchy"); goto no_fils; } if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0, wpa_bss_get_fils_cache_id(bss), 0) == 0) wpa_printf(MSG_DEBUG, "SME: Try to use FILS with PMKSA caching"); resp = fils_build_auth(wpa_s->wpa, ssid->fils_dh_group, md); if (resp) { int auth_alg; if (ssid->fils_dh_group) wpa_printf(MSG_DEBUG, "SME: Try to use FILS SK authentication with PFS (DH Group %u)", ssid->fils_dh_group); else wpa_printf(MSG_DEBUG, "SME: Try to use FILS SK authentication without PFS"); auth_alg = ssid->fils_dh_group ? WPA_AUTH_ALG_FILS_SK_PFS : WPA_AUTH_ALG_FILS; params.auth_alg = auth_alg; params.auth_data = wpabuf_head(resp); params.auth_data_len = wpabuf_len(resp); wpa_s->sme.auth_alg = auth_alg; } } no_fils: #endif /* CONFIG_FILS */ 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); eapol_sm_notify_portValid(wpa_s->eapol, false); wpa_clear_keys(wpa_s, bss->bssid); wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING); if (old_ssid != wpa_s->current_ssid) wpas_notify_network_changed(wpa_s); #ifdef CONFIG_HS20 hs20_configure_frame_filters(wpa_s); #endif /* CONFIG_HS20 */ #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; wpa_s->roam_in_progress = false; #ifdef CONFIG_WNM wpa_s->bss_trans_mgmt_in_progress = false; #endif /* CONFIG_WNM */ 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; } /* Starting new connection, so clear the possibly used WPA IE from the * previous association. */ wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); wpa_sm_set_assoc_rsnxe(wpa_s->wpa, NULL, 0); wpa_s->rsnxe_len = 0; 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 (wpa_s->roam_in_progress) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() in favor of explicit roam request"); return; } #ifdef CONFIG_WNM if (wpa_s->bss_trans_mgmt_in_progress) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() in favor of BSS transition management request"); return; } #endif /* CONFIG_WNM */ 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_external_auth_build_buf(struct wpabuf *buf, struct wpabuf *params, const u8 *sa, const u8 *da, u16 auth_transaction, u16 seq_num, u16 status_code) { struct ieee80211_mgmt *resp; resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt, u.auth.variable)); resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_AUTH << 4)); os_memcpy(resp->da, da, ETH_ALEN); os_memcpy(resp->sa, sa, ETH_ALEN); os_memcpy(resp->bssid, da, ETH_ALEN); resp->u.auth.auth_alg = host_to_le16(WLAN_AUTH_SAE); resp->seq_ctrl = host_to_le16(seq_num << 4); resp->u.auth.auth_transaction = host_to_le16(auth_transaction); resp->u.auth.status_code = host_to_le16(status_code); if (params) wpabuf_put_buf(buf, params); return 0; } static int sme_external_auth_send_sae_commit(struct wpa_supplicant *wpa_s, const u8 *bssid, struct wpa_ssid *ssid) { struct wpabuf *resp, *buf; int use_pt; bool use_pk; u16 status; resp = sme_auth_build_sae_commit(wpa_s, ssid, bssid, 1, 0, &use_pt, &use_pk); if (!resp) { wpa_printf(MSG_DEBUG, "SAE: Failed to build SAE commit"); return -1; } wpa_s->sme.sae.state = SAE_COMMITTED; buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + wpabuf_len(resp)); if (!buf) { wpabuf_free(resp); return -1; } wpa_s->sme.seq_num++; if (use_pk) status = WLAN_STATUS_SAE_PK; else if (use_pt) status = WLAN_STATUS_SAE_HASH_TO_ELEMENT; else status = WLAN_STATUS_SUCCESS; sme_external_auth_build_buf(buf, resp, wpa_s->own_addr, bssid, 1, wpa_s->sme.seq_num, status); wpa_drv_send_mlme(wpa_s, wpabuf_head(buf), wpabuf_len(buf), 1, 0, 0); wpabuf_free(resp); wpabuf_free(buf); return 0; } static void sme_send_external_auth_status(struct wpa_supplicant *wpa_s, u16 status) { struct external_auth params; os_memset(¶ms, 0, sizeof(params)); params.status = status; params.ssid = wpa_s->sme.ext_auth_ssid; params.ssid_len = wpa_s->sme.ext_auth_ssid_len; params.bssid = wpa_s->sme.ext_auth_bssid; if (wpa_s->conf->sae_pmkid_in_assoc && status == WLAN_STATUS_SUCCESS) params.pmkid = wpa_s->sme.sae.pmkid; wpa_drv_send_external_auth_status(wpa_s, ¶ms); } static int sme_handle_external_auth_start(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { struct wpa_ssid *ssid; size_t ssid_str_len = data->external_auth.ssid_len; const u8 *ssid_str = data->external_auth.ssid; /* Get the SSID conf from the ssid string obtained */ for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { if (!wpas_network_disabled(wpa_s, ssid) && ssid_str_len == ssid->ssid_len && os_memcmp(ssid_str, ssid->ssid, ssid_str_len) == 0 && (ssid->key_mgmt & (WPA_KEY_MGMT_SAE | WPA_KEY_MGMT_FT_SAE))) break; } if (!ssid || sme_external_auth_send_sae_commit(wpa_s, data->external_auth.bssid, ssid) < 0) return -1; return 0; } static void sme_external_auth_send_sae_confirm(struct wpa_supplicant *wpa_s, const u8 *da) { struct wpabuf *resp, *buf; resp = sme_auth_build_sae_confirm(wpa_s, 1); if (!resp) { wpa_printf(MSG_DEBUG, "SAE: Confirm message buf alloc failure"); return; } wpa_s->sme.sae.state = SAE_CONFIRMED; buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN + wpabuf_len(resp)); if (!buf) { wpa_printf(MSG_DEBUG, "SAE: Auth Confirm buf alloc failure"); wpabuf_free(resp); return; } wpa_s->sme.seq_num++; sme_external_auth_build_buf(buf, resp, wpa_s->own_addr, da, 2, wpa_s->sme.seq_num, WLAN_STATUS_SUCCESS); wpa_drv_send_mlme(wpa_s, wpabuf_head(buf), wpabuf_len(buf), 1, 0, 0); wpabuf_free(resp); wpabuf_free(buf); } void sme_external_auth_trigger(struct wpa_supplicant *wpa_s, union wpa_event_data *data) { if (RSN_SELECTOR_GET(&data->external_auth.key_mgmt_suite) != RSN_AUTH_KEY_MGMT_SAE) return; if (data->external_auth.action == EXT_AUTH_START) { if (!data->external_auth.bssid || !data->external_auth.ssid) return; os_memcpy(wpa_s->sme.ext_auth_bssid, data->external_auth.bssid, ETH_ALEN); os_memcpy(wpa_s->sme.ext_auth_ssid, data->external_auth.ssid, data->external_auth.ssid_len); wpa_s->sme.ext_auth_ssid_len = data->external_auth.ssid_len; wpa_s->sme.seq_num = 0; wpa_s->sme.sae.state = SAE_NOTHING; wpa_s->sme.sae.send_confirm = 0; wpa_s->sme.sae_group_index = 0; if (sme_handle_external_auth_start(wpa_s, data) < 0) sme_send_external_auth_status(wpa_s, WLAN_STATUS_UNSPECIFIED_FAILURE); } else if (data->external_auth.action == EXT_AUTH_ABORT) { /* Report failure to driver for the wrong trigger */ sme_send_external_auth_status(wpa_s, WLAN_STATUS_UNSPECIFIED_FAILURE); } } static int sme_sae_is_group_enabled(struct wpa_supplicant *wpa_s, int group) { int *groups = wpa_s->conf->sae_groups; int default_groups[] = { 19, 20, 21, 0 }; int i; if (!groups) groups = default_groups; for (i = 0; groups[i] > 0; i++) { if (groups[i] == group) return 1; } return 0; } static int sme_check_sae_rejected_groups(struct wpa_supplicant *wpa_s, const struct wpabuf *groups) { size_t i, count; const u8 *pos; if (!groups) return 0; pos = wpabuf_head(groups); count = wpabuf_len(groups) / 2; for (i = 0; i < count; i++) { int enabled; u16 group; group = WPA_GET_LE16(pos); pos += 2; enabled = sme_sae_is_group_enabled(wpa_s, group); wpa_printf(MSG_DEBUG, "SAE: Rejected group %u is %s", group, enabled ? "enabled" : "disabled"); if (enabled) return 1; } return 0; } static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction, u16 status_code, const u8 *data, size_t len, int external, const u8 *sa) { 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 && (external || wpa_s->current_bss) && wpa_s->current_ssid) { int default_groups[] = { 19, 20, 21, 0 }; u16 group; const u8 *token_pos; size_t token_len; int h2e = 0; groups = wpa_s->conf->sae_groups; if (!groups || groups[0] <= 0) groups = default_groups; wpa_hexdump(MSG_DEBUG, "SME: SAE anti-clogging token request", data, len); 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); token_pos = data + sizeof(le16); token_len = len - sizeof(le16); h2e = wpa_s->sme.sae.h2e; if (h2e) { u8 id, elen, extid; if (token_len < 3) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Too short SAE anti-clogging token container"); return -1; } id = *token_pos++; elen = *token_pos++; extid = *token_pos++; if (id != WLAN_EID_EXTENSION || elen == 0 || elen > token_len - 2 || extid != WLAN_EID_EXT_ANTI_CLOGGING_TOKEN) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: Invalid SAE anti-clogging token container header"); return -1; } token_len = elen - 1; } wpa_s->sme.sae_token = wpabuf_alloc_copy(token_pos, token_len); wpa_hexdump_buf(MSG_DEBUG, "SME: Requested anti-clogging token", wpa_s->sme.sae_token); if (!external) sme_send_authentication(wpa_s, wpa_s->current_bss, wpa_s->current_ssid, 2); else sme_external_auth_send_sae_commit( wpa_s, wpa_s->sme.ext_auth_bssid, wpa_s->current_ssid); return 0; } if (auth_transaction == 1 && status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED && wpa_s->sme.sae.state == SAE_COMMITTED && (external || wpa_s->current_bss) && wpa_s->current_ssid) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported"); int_array_add_unique(&wpa_s->sme.sae_rejected_groups, wpa_s->sme.sae.group); 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"); if (!external) sme_send_authentication(wpa_s, wpa_s->current_bss, wpa_s->current_ssid, 1); else sme_external_auth_send_sae_commit( wpa_s, wpa_s->sme.ext_auth_bssid, wpa_s->current_ssid); return 0; } if (auth_transaction == 1 && status_code == WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER) { const u8 *bssid = sa ? sa : wpa_s->pending_bssid; wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SAE_UNKNOWN_PASSWORD_IDENTIFIER MACSTR, MAC2STR(bssid)); return -1; } if (status_code != WLAN_STATUS_SUCCESS && status_code != WLAN_STATUS_SAE_HASH_TO_ELEMENT && status_code != WLAN_STATUS_SAE_PK) { const u8 *bssid = sa ? sa : wpa_s->pending_bssid; wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR " auth_type=%u auth_transaction=%u status_code=%u", MAC2STR(bssid), WLAN_AUTH_SAE, auth_transaction, status_code); return -2; } if (auth_transaction == 1) { u16 res; groups = wpa_s->conf->sae_groups; wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit"); if ((!external && wpa_s->current_bss == NULL) || wpa_s->current_ssid == NULL) return -1; if (wpa_s->sme.sae.state != SAE_COMMITTED) { wpa_printf(MSG_DEBUG, "SAE: Ignore commit message while waiting for confirm"); return 0; } if (wpa_s->sme.sae.h2e && status_code == WLAN_STATUS_SUCCESS) { wpa_printf(MSG_DEBUG, "SAE: Unexpected use of status code 0 in SAE commit when H2E was expected"); return -1; } if ((!wpa_s->sme.sae.h2e || wpa_s->sme.sae.pk) && status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT) { wpa_printf(MSG_DEBUG, "SAE: Unexpected use of status code for H2E in SAE commit when H2E was not expected"); return -1; } if (!wpa_s->sme.sae.pk && status_code == WLAN_STATUS_SAE_PK) { wpa_printf(MSG_DEBUG, "SAE: Unexpected use of status code for PK in SAE commit when PK was not expected"); return -1; } if (groups && groups[0] <= 0) groups = NULL; res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL, groups, status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || status_code == WLAN_STATUS_SAE_PK); 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 (wpa_s->sme.sae.tmp && sme_check_sae_rejected_groups( wpa_s, wpa_s->sme.sae.tmp->peer_rejected_groups)) 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; if (!external) sme_send_authentication(wpa_s, wpa_s->current_bss, wpa_s->current_ssid, 0); else sme_external_auth_send_sae_confirm(wpa_s, sa); return 0; } else if (auth_transaction == 2) { if (status_code != WLAN_STATUS_SUCCESS) return -1; 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); if (external) { /* Report success to driver */ sme_send_external_auth_status(wpa_s, WLAN_STATUS_SUCCESS); } return 1; } return -1; } static int sme_sae_set_pmk(struct wpa_supplicant *wpa_s, const u8 *bssid) { 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, wpa_s->sme.sae.pmk_len, wpa_s->sme.sae.pmkid, bssid); if (wpa_s->conf->sae_pmkid_in_assoc) { /* Update the own RSNE contents now that we have set the PMK * and added a PMKSA cache entry based on the successfully * completed SAE exchange. In practice, this will add the PMKID * into RSNE. */ if (wpa_s->sme.assoc_req_ie_len + 2 + PMKID_LEN > sizeof(wpa_s->sme.assoc_req_ie)) { wpa_msg(wpa_s, MSG_WARNING, "RSN: Not enough room for inserting own PMKID into RSNE"); return -1; } if (wpa_insert_pmkid(wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len, wpa_s->sme.sae.pmkid) < 0) return -1; wpa_hexdump(MSG_DEBUG, "SME: Updated Association Request IEs", wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); } return 0; } void sme_external_auth_mgmt_rx(struct wpa_supplicant *wpa_s, const u8 *auth_frame, size_t len) { const struct ieee80211_mgmt *header; size_t auth_length; header = (const struct ieee80211_mgmt *) auth_frame; auth_length = IEEE80211_HDRLEN + sizeof(header->u.auth); if (len < auth_length) { /* Notify failure to the driver */ sme_send_external_auth_status(wpa_s, WLAN_STATUS_UNSPECIFIED_FAILURE); return; } if (le_to_host16(header->u.auth.auth_alg) == WLAN_AUTH_SAE) { int res; res = sme_sae_auth( wpa_s, le_to_host16(header->u.auth.auth_transaction), le_to_host16(header->u.auth.status_code), header->u.auth.variable, len - auth_length, 1, header->sa); if (res < 0) { /* Notify failure to the driver */ sme_send_external_auth_status( wpa_s, res == -2 ? le_to_host16(header->u.auth.status_code) : WLAN_STATUS_UNSPECIFIED_FAILURE); return; } if (res != 1) return; if (sme_sae_set_pmk(wpa_s, wpa_s->sme.ext_auth_bssid) < 0) return; } } #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, 0, data->auth.peer); if (res < 0) { wpas_connection_failed(wpa_s, wpa_s->pending_bssid); wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); } if (res != 1) return; if (sme_sae_set_pmk(wpa_s, wpa_s->pending_bssid) < 0) return; } #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%s%s", MAC2STR(data->auth.peer), data->auth.auth_type, data->auth.auth_transaction, data->auth.status_code, ie_txt ? " ie=" : "", ie_txt ? ie_txt : ""); os_free(ie_txt); #ifdef CONFIG_FILS if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FILS || wpa_s->sme.auth_alg == WPA_AUTH_ALG_FILS_SK_PFS) fils_connection_failure(wpa_s); #endif /* CONFIG_FILS */ 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) { const u8 *ric_ies = NULL; size_t ric_ies_len = 0; if (wpa_s->ric_ies) { ric_ies = wpabuf_head(wpa_s->ric_ies); ric_ies_len = wpabuf_len(wpa_s->ric_ies); } if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies, data->auth.ies_len, 0, data->auth.peer, ric_ies, ric_ies_len) < 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 */ #ifdef CONFIG_FILS if (data->auth.auth_type == WLAN_AUTH_FILS_SK || data->auth.auth_type == WLAN_AUTH_FILS_SK_PFS) { u16 expect_auth_type; expect_auth_type = wpa_s->sme.auth_alg == WPA_AUTH_ALG_FILS_SK_PFS ? WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK; if (data->auth.auth_type != expect_auth_type) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: FILS Authentication response used different auth alg (%u; expected %u)", data->auth.auth_type, expect_auth_type); 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; } if (fils_process_auth(wpa_s->wpa, wpa_s->pending_bssid, data->auth.ies, data->auth.ies_len) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "SME: FILS 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_FILS */ sme_associate(wpa_s, ssid->mode, data->auth.peer, data->auth.auth_type); } #ifdef CONFIG_IEEE80211R static void remove_ie(u8 *buf, size_t *len, u8 eid) { u8 *pos, *next, *end; pos = (u8 *) get_ie(buf, *len, eid); if (pos) { next = pos + 2 + pos[1]; end = buf + *len; *len -= 2 + pos[1]; os_memmove(pos, next, end - next); } } #endif /* CONFIG_IEEE80211R */ 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; struct wpa_ssid *ssid = wpa_s->current_ssid; #ifdef CONFIG_FILS u8 nonces[2 * FILS_NONCE_LEN]; #endif /* CONFIG_FILS */ #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)); #ifdef CONFIG_FILS if (auth_type == WLAN_AUTH_FILS_SK || auth_type == WLAN_AUTH_FILS_SK_PFS) { struct wpabuf *buf; const u8 *snonce, *anonce; const unsigned int max_hlp = 20; struct wpabuf *hlp[max_hlp]; unsigned int i, num_hlp = 0; struct fils_hlp_req *req; dl_list_for_each(req, &wpa_s->fils_hlp_req, struct fils_hlp_req, list) { hlp[num_hlp] = wpabuf_alloc(2 * ETH_ALEN + 6 + wpabuf_len(req->pkt)); if (!hlp[num_hlp]) break; wpabuf_put_data(hlp[num_hlp], req->dst, ETH_ALEN); wpabuf_put_data(hlp[num_hlp], wpa_s->own_addr, ETH_ALEN); wpabuf_put_data(hlp[num_hlp], "\xaa\xaa\x03\x00\x00\x00", 6); wpabuf_put_buf(hlp[num_hlp], req->pkt); num_hlp++; if (num_hlp >= max_hlp) break; } buf = fils_build_assoc_req(wpa_s->wpa, ¶ms.fils_kek, ¶ms.fils_kek_len, &snonce, &anonce, (const struct wpabuf **) hlp, num_hlp); for (i = 0; i < num_hlp; i++) wpabuf_free(hlp[i]); if (!buf) return; wpa_hexdump(MSG_DEBUG, "FILS: assoc_req before FILS elements", wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); #ifdef CONFIG_IEEE80211R if (wpa_key_mgmt_ft(wpa_s->key_mgmt)) { /* Remove RSNE and MDE to allow them to be overridden * with FILS+FT specific values from * fils_build_assoc_req(). */ remove_ie(wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len, WLAN_EID_RSN); wpa_hexdump(MSG_DEBUG, "FILS: assoc_req after RSNE removal", wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); remove_ie(wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len, WLAN_EID_MOBILITY_DOMAIN); wpa_hexdump(MSG_DEBUG, "FILS: assoc_req after MDE removal", wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); } #endif /* CONFIG_IEEE80211R */ /* TODO: Make wpa_s->sme.assoc_req_ie use dynamic allocation */ if (wpa_s->sme.assoc_req_ie_len + wpabuf_len(buf) > sizeof(wpa_s->sme.assoc_req_ie)) { wpa_printf(MSG_ERROR, "FILS: Not enough buffer room for own AssocReq elements"); wpabuf_free(buf); return; } 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); wpabuf_free(buf); wpa_hexdump(MSG_DEBUG, "FILS: assoc_req after FILS elements", wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); os_memcpy(nonces, snonce, FILS_NONCE_LEN); os_memcpy(nonces + FILS_NONCE_LEN, anonce, FILS_NONCE_LEN); params.fils_nonces = nonces; params.fils_nonces_len = sizeof(nonces); } #endif /* CONFIG_FILS */ #ifdef CONFIG_OWE #ifdef CONFIG_TESTING_OPTIONS if (get_ie_ext(wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len, WLAN_EID_EXT_OWE_DH_PARAM)) { wpa_printf(MSG_INFO, "TESTING: Override OWE DH element"); } else #endif /* CONFIG_TESTING_OPTIONS */ if (auth_type == WLAN_AUTH_OPEN && wpa_s->key_mgmt == WPA_KEY_MGMT_OWE) { struct wpabuf *owe_ie; u16 group; if (ssid && ssid->owe_group) { group = ssid->owe_group; } else if (wpa_s->assoc_status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED) { if (wpa_s->last_owe_group == 19) group = 20; else if (wpa_s->last_owe_group == 20) group = 21; else group = OWE_DH_GROUP; } else { group = OWE_DH_GROUP; } wpa_s->last_owe_group = group; wpa_printf(MSG_DEBUG, "OWE: Try to use group %u", group); owe_ie = owe_build_assoc_req(wpa_s->wpa, group); if (!owe_ie) { wpa_printf(MSG_ERROR, "OWE: Failed to build IE for Association Request frame"); return; } if (wpa_s->sme.assoc_req_ie_len + wpabuf_len(owe_ie) > sizeof(wpa_s->sme.assoc_req_ie)) { wpa_printf(MSG_ERROR, "OWE: Not enough buffer room for own Association Request frame elements"); wpabuf_free(owe_ie); return; } os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpabuf_head(owe_ie), wpabuf_len(owe_ie)); wpa_s->sme.assoc_req_ie_len += wpabuf_len(owe_ie); wpabuf_free(owe_ie); } #endif /* CONFIG_OWE */ #ifdef CONFIG_DPP2 if (DPP_VERSION > 1 && wpa_s->key_mgmt == WPA_KEY_MGMT_DPP && ssid && ssid->dpp_netaccesskey && ssid->dpp_pfs != 2 && !ssid->dpp_pfs_fallback) { struct rsn_pmksa_cache_entry *pmksa; pmksa = pmksa_cache_get_current(wpa_s->wpa); if (!pmksa || !pmksa->dpp_pfs) goto pfs_fail; dpp_pfs_free(wpa_s->dpp_pfs); wpa_s->dpp_pfs = dpp_pfs_init(ssid->dpp_netaccesskey, ssid->dpp_netaccesskey_len); if (!wpa_s->dpp_pfs) { wpa_printf(MSG_DEBUG, "DPP: Could not initialize PFS"); /* Try to continue without PFS */ goto pfs_fail; } if (wpa_s->sme.assoc_req_ie_len + wpabuf_len(wpa_s->dpp_pfs->ie) > sizeof(wpa_s->sme.assoc_req_ie)) { wpa_printf(MSG_ERROR, "DPP: Not enough buffer room for own Association Request frame elements"); dpp_pfs_free(wpa_s->dpp_pfs); wpa_s->dpp_pfs = NULL; goto pfs_fail; } os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len, wpabuf_head(wpa_s->dpp_pfs->ie), wpabuf_len(wpa_s->dpp_pfs->ie)); wpa_s->sme.assoc_req_ie_len += wpabuf_len(wpa_s->dpp_pfs->ie); } pfs_fail: #endif /* CONFIG_DPP2 */ wpa_s->mscs_setup_done = false; if (wpa_bss_ext_capab(wpa_s->current_bss, WLAN_EXT_CAPAB_MSCS) && wpa_s->robust_av.valid_config) { struct wpabuf *mscs_ie; size_t mscs_ie_len, buf_len, *wpa_ie_len, max_ie_len; buf_len = 3 + /* MSCS descriptor IE header */ 1 + /* Request type */ 2 + /* User priority control */ 4 + /* Stream timeout */ 3 + /* TCLAS Mask IE header */ wpa_s->robust_av.frame_classifier_len; mscs_ie = wpabuf_alloc(buf_len); if (!mscs_ie) { wpa_printf(MSG_INFO, "MSCS: Failed to allocate MSCS IE"); goto mscs_fail; } wpa_ie_len = &wpa_s->sme.assoc_req_ie_len; max_ie_len = sizeof(wpa_s->sme.assoc_req_ie); wpas_populate_mscs_descriptor_ie(&wpa_s->robust_av, mscs_ie); if ((*wpa_ie_len + wpabuf_len(mscs_ie)) <= max_ie_len) { wpa_hexdump_buf(MSG_MSGDUMP, "MSCS IE", mscs_ie); mscs_ie_len = wpabuf_len(mscs_ie); os_memcpy(wpa_s->sme.assoc_req_ie + *wpa_ie_len, wpabuf_head(mscs_ie), mscs_ie_len); *wpa_ie_len += mscs_ie_len; } wpabuf_free(mscs_ie); } mscs_fail: if (ssid && ssid->multi_ap_backhaul_sta) { size_t multi_ap_ie_len; multi_ap_ie_len = add_multi_ap_ie( 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, MULTI_AP_BACKHAUL_STA); if (multi_ap_ie_len == 0) { wpa_printf(MSG_ERROR, "Multi-AP: Failed to build Multi-AP IE"); return; } wpa_s->sme.assoc_req_ie_len += multi_ap_ie_len; } 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 = ssid ? 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; wpa_hexdump(MSG_DEBUG, "SME: Association Request IEs", params.wpa_ie, params.wpa_ie_len); params.pairwise_suite = wpa_s->pairwise_cipher; params.group_suite = wpa_s->group_cipher; params.mgmt_group_suite = wpa_s->mgmt_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, 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, ssid, ¶ms); #endif /* CONFIG_VHT_OVERRIDES */ #ifdef CONFIG_HE_OVERRIDES wpa_supplicant_apply_he_overrides(wpa_s, ssid, ¶ms); #endif /* CONFIG_HE_OVERRIDES */ #ifdef CONFIG_IEEE80211R if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies && get_ie(wpa_s->sme.ft_ies, wpa_s->sme.ft_ies_len, WLAN_EID_RIC_DATA)) { /* There seems to be a pretty inconvenient bug in the Linux * kernel IE splitting functionality when RIC is used. For now, * skip correct behavior in IE construction here (i.e., drop the * additional non-FT-specific IEs) to avoid kernel issues. This * is fine since RIC is used only for testing purposes in the * current implementation. */ wpa_printf(MSG_INFO, "SME: Linux kernel workaround - do not try to include additional IEs with RIC"); params.wpa_ie = wpa_s->sme.ft_ies; params.wpa_ie_len = wpa_s->sme.ft_ies_len; } else if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) { const u8 *rm_en, *pos, *end; size_t rm_en_len = 0; u8 *rm_en_dup = NULL, *wpos; /* Remove RSNE, MDE, FTE to allow them to be overridden with * FT specific values */ remove_ie(wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len, WLAN_EID_RSN); remove_ie(wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len, WLAN_EID_MOBILITY_DOMAIN); remove_ie(wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len, WLAN_EID_FAST_BSS_TRANSITION); rm_en = get_ie(wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len, WLAN_EID_RRM_ENABLED_CAPABILITIES); if (rm_en) { /* Need to remove RM Enabled Capabilities element as * well temporarily, so that it can be placed between * RSNE and MDE. */ rm_en_len = 2 + rm_en[1]; rm_en_dup = os_memdup(rm_en, rm_en_len); remove_ie(wpa_s->sme.assoc_req_ie, &wpa_s->sme.assoc_req_ie_len, WLAN_EID_RRM_ENABLED_CAPABILITIES); } wpa_hexdump(MSG_DEBUG, "SME: Association Request IEs after FT IE removal", wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); if (wpa_s->sme.assoc_req_ie_len + wpa_s->sme.ft_ies_len + rm_en_len > sizeof(wpa_s->sme.assoc_req_ie)) { wpa_printf(MSG_ERROR, "SME: Not enough buffer room for FT IEs in Association Request frame"); os_free(rm_en_dup); return; } os_memmove(wpa_s->sme.assoc_req_ie + wpa_s->sme.ft_ies_len + rm_en_len, wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len); pos = wpa_s->sme.ft_ies; end = pos + wpa_s->sme.ft_ies_len; wpos = wpa_s->sme.assoc_req_ie; if (*pos == WLAN_EID_RSN) { os_memcpy(wpos, pos, 2 + pos[1]); wpos += 2 + pos[1]; pos += 2 + pos[1]; } if (rm_en_dup) { os_memcpy(wpos, rm_en_dup, rm_en_len); wpos += rm_en_len; os_free(rm_en_dup); } os_memcpy(wpos, pos, end - pos); wpa_s->sme.assoc_req_ie_len += wpa_s->sme.ft_ies_len + rm_en_len; params.wpa_ie = wpa_s->sme.assoc_req_ie; params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len; wpa_hexdump(MSG_DEBUG, "SME: Association Request IEs after FT override", params.wpa_ie, params.wpa_ie_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 (elems.rsnxe) wpa_sm_set_assoc_rsnxe(wpa_s->wpa, elems.rsnxe - 2, elems.rsnxe_len + 2); else wpa_sm_set_assoc_rsnxe(wpa_s->wpa, NULL, 0); if (ssid && 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); #ifdef CONFIG_TESTING_OPTIONS wpabuf_free(wpa_s->last_assoc_req_wpa_ie); wpa_s->last_assoc_req_wpa_ie = NULL; if (params.wpa_ie) wpa_s->last_assoc_req_wpa_ie = wpabuf_alloc_copy(params.wpa_ie, params.wpa_ie_len); #endif /* CONFIG_TESTING_OPTIONS */ } 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_memdup(ies, ies_len); if (wpa_s->sme.ft_ies == NULL) return -1; 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 || wpa_s->sme.ft_used) sme_update_ft_ies(wpa_s, NULL, NULL, 0); #endif /* CONFIG_IEEE80211R */ sme_stop_sa_query(wpa_s); } void sme_deinit(struct wpa_supplicant *wpa_s) { sme_clear_on_disassoc(wpa_s); #ifdef CONFIG_SAE os_free(wpa_s->sme.sae_rejected_groups); wpa_s->sme.sae_rejected_groups = NULL; #endif /* CONFIG_SAE */ 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, false); 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 != WPAS_MODE_INFRA) return; #ifdef CONFIG_HT_OVERRIDES /* No need for OBSS scan if HT40 is explicitly disabled */ if (ssid->disable_ht40) return; #endif /* CONFIG_HT_OVERRIDES */ 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); } static const unsigned int sa_query_max_timeout = 1000; static const unsigned int sa_query_retry_timeout = 201; static const unsigned int sa_query_ch_switch_max_delay = 5000; /* in usec */ 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 + OCV_OCI_EXTENDED_LEN]; u8 req_len = 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); #ifdef CONFIG_OCV if (wpa_sm_ocv_enabled(wpa_s->wpa)) { struct wpa_channel_info ci; if (wpa_drv_channel_info(wpa_s, &ci) != 0) { wpa_printf(MSG_WARNING, "Failed to get channel info for OCI element in SA Query Request frame"); return; } #ifdef CONFIG_TESTING_OPTIONS if (wpa_s->oci_freq_override_saquery_req) { wpa_printf(MSG_INFO, "TEST: Override SA Query Request OCI frequency %d -> %d MHz", ci.frequency, wpa_s->oci_freq_override_saquery_req); ci.frequency = wpa_s->oci_freq_override_saquery_req; } #endif /* CONFIG_TESTING_OPTIONS */ if (ocv_insert_extended_oci(&ci, req + req_len) < 0) return; req_len += OCV_OCI_EXTENDED_LEN; } #endif /* CONFIG_OCV */ if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, wpa_s->own_addr, wpa_s->bssid, req, req_len, 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) { sme_stop_sa_query(wpa_s); 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"); sme_stop_sa_query(wpa_s); 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) { if (wpa_s->sme.sa_query_trans_id) wpa_dbg(wpa_s, MSG_DEBUG, "SME: Stop SA Query"); 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; #ifdef CONFIG_TESTING_OPTIONS if (wpa_s->disable_sa_query) return; #endif /* CONFIG_TESTING_OPTIONS */ 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_event_ch_switch(struct wpa_supplicant *wpa_s) { unsigned int usec; u32 _rand; if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_sm_ocv_enabled(wpa_s->wpa)) return; wpa_dbg(wpa_s, MSG_DEBUG, "SME: Channel switch completed - trigger new SA Query to verify new operating channel"); sme_stop_sa_query(wpa_s); if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0) _rand = os_random(); usec = _rand % (sa_query_ch_switch_max_delay + 1); eloop_register_timeout(0, usec, sme_sa_query_timer, wpa_s, NULL); } static void sme_process_sa_query_request(struct wpa_supplicant *wpa_s, const u8 *sa, const u8 *data, size_t len) { u8 resp[2 + WLAN_SA_QUERY_TR_ID_LEN + OCV_OCI_EXTENDED_LEN]; u8 resp_len = 2 + WLAN_SA_QUERY_TR_ID_LEN; wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Response to " MACSTR, MAC2STR(wpa_s->bssid)); resp[0] = WLAN_ACTION_SA_QUERY; resp[1] = WLAN_SA_QUERY_RESPONSE; os_memcpy(resp + 2, data + 1, WLAN_SA_QUERY_TR_ID_LEN); #ifdef CONFIG_OCV if (wpa_sm_ocv_enabled(wpa_s->wpa)) { struct wpa_channel_info ci; if (wpa_drv_channel_info(wpa_s, &ci) != 0) { wpa_printf(MSG_WARNING, "Failed to get channel info for OCI element in SA Query Response frame"); return; } #ifdef CONFIG_TESTING_OPTIONS if (wpa_s->oci_freq_override_saquery_resp) { wpa_printf(MSG_INFO, "TEST: Override SA Query Response OCI frequency %d -> %d MHz", ci.frequency, wpa_s->oci_freq_override_saquery_resp); ci.frequency = wpa_s->oci_freq_override_saquery_resp; } #endif /* CONFIG_TESTING_OPTIONS */ if (ocv_insert_extended_oci(&ci, resp + resp_len) < 0) return; resp_len += OCV_OCI_EXTENDED_LEN; } #endif /* CONFIG_OCV */ if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid, wpa_s->own_addr, wpa_s->bssid, resp, resp_len, 0) < 0) wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query Response"); } static void sme_process_sa_query_response(struct wpa_supplicant *wpa_s, const u8 *sa, const u8 *data, size_t len) { int i; if (!wpa_s->sme.sa_query_trans_id) 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); } void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *da, const u8 *sa, const u8 *data, size_t len) { if (len < 1 + WLAN_SA_QUERY_TR_ID_LEN) return; if (is_multicast_ether_addr(da)) { wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore group-addressed SA Query frame (A1=" MACSTR " A2=" MACSTR ")", MAC2STR(da), MAC2STR(sa)); return; } wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query frame from " MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]); #ifdef CONFIG_OCV if (wpa_sm_ocv_enabled(wpa_s->wpa)) { struct ieee802_11_elems elems; struct wpa_channel_info ci; if (ieee802_11_parse_elems(data + 1 + WLAN_SA_QUERY_TR_ID_LEN, len - 1 - WLAN_SA_QUERY_TR_ID_LEN, &elems, 1) == ParseFailed) { wpa_printf(MSG_DEBUG, "SA Query: Failed to parse elements"); return; } if (wpa_drv_channel_info(wpa_s, &ci) != 0) { wpa_printf(MSG_WARNING, "Failed to get channel info to validate received OCI in SA Query Action frame"); return; } if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci, channel_width_to_int(ci.chanwidth), ci.seg1_idx) != OCI_SUCCESS) { wpa_msg(wpa_s, MSG_INFO, OCV_FAILURE "addr=" MACSTR " frame=saquery%s error=%s", MAC2STR(sa), data[0] == WLAN_SA_QUERY_REQUEST ? "req" : "resp", ocv_errorstr); return; } } #endif /* CONFIG_OCV */ if (data[0] == WLAN_SA_QUERY_REQUEST) sme_process_sa_query_request(wpa_s, sa, data, len); else if (data[0] == WLAN_SA_QUERY_RESPONSE) sme_process_sa_query_response(wpa_s, sa, data, len); }