/* * Interworking (IEEE 802.11u) * Copyright (c) 2011-2013, Qualcomm Atheros, Inc. * Copyright (c) 2011-2014, 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 "common/ieee802_11_defs.h" #include "common/gas.h" #include "common/wpa_ctrl.h" #include "utils/pcsc_funcs.h" #include "utils/eloop.h" #include "drivers/driver.h" #include "eap_common/eap_defs.h" #include "eap_peer/eap.h" #include "eap_peer/eap_methods.h" #include "eapol_supp/eapol_supp_sm.h" #include "rsn_supp/wpa.h" #include "wpa_supplicant_i.h" #include "config.h" #include "config_ssid.h" #include "bss.h" #include "scan.h" #include "notify.h" #include "driver_i.h" #include "gas_query.h" #include "hs20_supplicant.h" #include "interworking.h" #if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC) #define INTERWORKING_3GPP #else #if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC) #define INTERWORKING_3GPP #else #if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC) #define INTERWORKING_3GPP #endif #endif #endif static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s); static struct wpa_cred * interworking_credentials_available_realm( struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, int *excluded); static struct wpa_cred * interworking_credentials_available_3gpp( struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, int *excluded); static int cred_prio_cmp(const struct wpa_cred *a, const struct wpa_cred *b) { if (a->priority > b->priority) return 1; if (a->priority < b->priority) return -1; if (a->provisioning_sp == NULL || b->provisioning_sp == NULL || os_strcmp(a->provisioning_sp, b->provisioning_sp) != 0) return 0; if (a->sp_priority < b->sp_priority) return 1; if (a->sp_priority > b->sp_priority) return -1; return 0; } static void interworking_reconnect(struct wpa_supplicant *wpa_s) { unsigned int tried; if (wpa_s->wpa_state >= WPA_AUTHENTICATING) { wpa_supplicant_cancel_sched_scan(wpa_s); wpa_s->own_disconnect_req = 1; wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING); } wpa_s->disconnected = 0; wpa_s->reassociate = 1; tried = wpa_s->interworking_fast_assoc_tried; wpa_s->interworking_fast_assoc_tried = 1; if (!tried && wpa_supplicant_fast_associate(wpa_s) >= 0) return; wpa_s->interworking_fast_assoc_tried = 0; wpa_supplicant_req_scan(wpa_s, 0, 0); } static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids, struct wpabuf *extra) { struct wpabuf *buf; size_t i; u8 *len_pos; buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 + (extra ? wpabuf_len(extra) : 0)); if (buf == NULL) return NULL; if (num_ids > 0) { len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST); for (i = 0; i < num_ids; i++) wpabuf_put_le16(buf, info_ids[i]); gas_anqp_set_element_len(buf, len_pos); } if (extra) wpabuf_put_buf(buf, extra); gas_anqp_set_len(buf); return buf; } static void interworking_anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token, enum gas_query_result result, const struct wpabuf *adv_proto, const struct wpabuf *resp, u16 status_code) { struct wpa_supplicant *wpa_s = ctx; wpa_printf(MSG_DEBUG, "ANQP: Response callback dst=" MACSTR " dialog_token=%u result=%d status_code=%u", MAC2STR(dst), dialog_token, result, status_code); anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp, status_code); interworking_next_anqp_fetch(wpa_s); } static int cred_with_roaming_consortium(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->num_home_ois) return 1; if (cred->num_required_home_ois) return 1; if (cred->num_roaming_consortiums) return 1; } return 0; } static int cred_with_3gpp(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->pcsc || cred->imsi) return 1; } return 0; } static int cred_with_nai_realm(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->pcsc || cred->imsi) continue; if (!cred->eap_method) return 1; if (cred->realm) return 1; } return 0; } static int cred_with_domain(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->domain || cred->pcsc || cred->imsi || cred->roaming_partner) return 1; } return 0; } #ifdef CONFIG_HS20 static int cred_with_min_backhaul(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->min_dl_bandwidth_home || cred->min_ul_bandwidth_home || cred->min_dl_bandwidth_roaming || cred->min_ul_bandwidth_roaming) return 1; } return 0; } static int cred_with_conn_capab(struct wpa_supplicant *wpa_s) { struct wpa_cred *cred; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->num_req_conn_capab) return 1; } return 0; } #endif /* CONFIG_HS20 */ static int additional_roaming_consortiums(struct wpa_bss *bss) { const u8 *ie; ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); if (ie == NULL || ie[1] == 0) return 0; return ie[2]; /* Number of ANQP OIs */ } static void interworking_continue_anqp(void *eloop_ctx, void *sock_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; interworking_next_anqp_fetch(wpa_s); } static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpabuf *buf; int ret = 0; int res; u16 info_ids[8]; size_t num_info_ids = 0; struct wpabuf *extra = NULL; int all = wpa_s->fetch_all_anqp; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR, MAC2STR(bss->bssid)); wpa_s->interworking_gas_bss = bss; info_ids[num_info_ids++] = ANQP_CAPABILITY_LIST; if (all) { info_ids[num_info_ids++] = ANQP_VENUE_NAME; info_ids[num_info_ids++] = ANQP_NETWORK_AUTH_TYPE; } if (all || (cred_with_roaming_consortium(wpa_s) && additional_roaming_consortiums(bss))) info_ids[num_info_ids++] = ANQP_ROAMING_CONSORTIUM; if (all) info_ids[num_info_ids++] = ANQP_IP_ADDR_TYPE_AVAILABILITY; if (all || cred_with_nai_realm(wpa_s)) info_ids[num_info_ids++] = ANQP_NAI_REALM; if (all || cred_with_3gpp(wpa_s)) { info_ids[num_info_ids++] = ANQP_3GPP_CELLULAR_NETWORK; wpa_supplicant_scard_init(wpa_s, NULL); } if (all || cred_with_domain(wpa_s)) info_ids[num_info_ids++] = ANQP_DOMAIN_NAME; wpa_hexdump(MSG_DEBUG, "Interworking: ANQP Query info", (u8 *) info_ids, num_info_ids * 2); #ifdef CONFIG_HS20 if (wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE)) { u8 *len_pos; extra = wpabuf_alloc(100); if (!extra) return -1; len_pos = gas_anqp_add_element(extra, ANQP_VENDOR_SPECIFIC); wpabuf_put_be24(extra, OUI_WFA); wpabuf_put_u8(extra, HS20_ANQP_OUI_TYPE); wpabuf_put_u8(extra, HS20_STYPE_QUERY_LIST); wpabuf_put_u8(extra, 0); /* Reserved */ wpabuf_put_u8(extra, HS20_STYPE_CAPABILITY_LIST); if (all) wpabuf_put_u8(extra, HS20_STYPE_OPERATOR_FRIENDLY_NAME); if (all || cred_with_min_backhaul(wpa_s)) wpabuf_put_u8(extra, HS20_STYPE_WAN_METRICS); if (all || cred_with_conn_capab(wpa_s)) wpabuf_put_u8(extra, HS20_STYPE_CONNECTION_CAPABILITY); if (all) wpabuf_put_u8(extra, HS20_STYPE_OPERATING_CLASS); if (all) { wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_LIST); wpabuf_put_u8(extra, HS20_STYPE_OSU_PROVIDERS_NAI_LIST); } gas_anqp_set_element_len(extra, len_pos); } #endif /* CONFIG_HS20 */ buf = anqp_build_req(info_ids, num_info_ids, extra); wpabuf_free(extra); if (buf == NULL) return -1; res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, 0, 0, buf, interworking_anqp_resp_cb, wpa_s); if (res < 0) { wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request"); wpabuf_free(buf); ret = -1; eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL); } else wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Query started with dialog token %u", res); return ret; } struct nai_realm_eap { u8 method; u8 inner_method; enum nai_realm_eap_auth_inner_non_eap inner_non_eap; u8 cred_type; u8 tunneled_cred_type; }; struct nai_realm { u8 encoding; char *realm; u8 eap_count; struct nai_realm_eap *eap; }; static void nai_realm_free(struct nai_realm *realms, u16 count) { u16 i; if (realms == NULL) return; for (i = 0; i < count; i++) { os_free(realms[i].eap); os_free(realms[i].realm); } os_free(realms); } static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos, const u8 *end) { u8 elen, auth_count, a; const u8 *e_end; if (end - pos < 3) { wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields"); return NULL; } elen = *pos++; if (elen > end - pos || elen < 2) { wpa_printf(MSG_DEBUG, "No room for EAP Method subfield"); return NULL; } e_end = pos + elen; e->method = *pos++; auth_count = *pos++; wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u", elen, e->method, auth_count); for (a = 0; a < auth_count; a++) { u8 id, len; if (end - pos < 2) { wpa_printf(MSG_DEBUG, "No room for Authentication Parameter subfield header"); return NULL; } id = *pos++; len = *pos++; if (len > end - pos) { wpa_printf(MSG_DEBUG, "No room for Authentication Parameter subfield"); return NULL; } switch (id) { case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH: if (len < 1) break; e->inner_non_eap = *pos; if (e->method != EAP_TYPE_TTLS) break; switch (*pos) { case NAI_REALM_INNER_NON_EAP_PAP: wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP"); break; case NAI_REALM_INNER_NON_EAP_CHAP: wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP"); break; case NAI_REALM_INNER_NON_EAP_MSCHAP: wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP"); break; case NAI_REALM_INNER_NON_EAP_MSCHAPV2: wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2"); break; default: wpa_printf(MSG_DEBUG, "Unsupported EAP-TTLS inner method %u", *pos); break; } break; case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD: if (len < 1) break; e->inner_method = *pos; wpa_printf(MSG_DEBUG, "Inner EAP method: %u", e->inner_method); break; case NAI_REALM_EAP_AUTH_CRED_TYPE: if (len < 1) break; e->cred_type = *pos; wpa_printf(MSG_DEBUG, "Credential Type: %u", e->cred_type); break; case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE: if (len < 1) break; e->tunneled_cred_type = *pos; wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential " "Type: %u", e->tunneled_cred_type); break; default: wpa_printf(MSG_DEBUG, "Unsupported Authentication " "Parameter: id=%u len=%u", id, len); wpa_hexdump(MSG_DEBUG, "Authentication Parameter " "Value", pos, len); break; } pos += len; } return e_end; } static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos, const u8 *end) { u16 len; const u8 *f_end; u8 realm_len, e; if (end - pos < 4) { wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " "fixed fields"); return NULL; } len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */ pos += 2; if (len > end - pos || len < 3) { wpa_printf(MSG_DEBUG, "No room for NAI Realm Data " "(len=%u; left=%u)", len, (unsigned int) (end - pos)); return NULL; } f_end = pos + len; r->encoding = *pos++; realm_len = *pos++; if (realm_len > f_end - pos) { wpa_printf(MSG_DEBUG, "No room for NAI Realm " "(len=%u; left=%u)", realm_len, (unsigned int) (f_end - pos)); return NULL; } wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len); r->realm = dup_binstr(pos, realm_len); if (r->realm == NULL) return NULL; pos += realm_len; if (f_end - pos < 1) { wpa_printf(MSG_DEBUG, "No room for EAP Method Count"); return NULL; } r->eap_count = *pos++; wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count); if (r->eap_count * 3 > f_end - pos) { wpa_printf(MSG_DEBUG, "No room for EAP Methods"); return NULL; } r->eap = os_calloc(r->eap_count, sizeof(struct nai_realm_eap)); if (r->eap == NULL) return NULL; for (e = 0; e < r->eap_count; e++) { pos = nai_realm_parse_eap(&r->eap[e], pos, f_end); if (pos == NULL) return NULL; } return f_end; } static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count) { struct nai_realm *realm; const u8 *pos, *end; u16 i, num; size_t left; if (anqp == NULL) return NULL; left = wpabuf_len(anqp); if (left < 2) return NULL; pos = wpabuf_head_u8(anqp); end = pos + left; num = WPA_GET_LE16(pos); wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num); pos += 2; left -= 2; if (num > left / 5) { wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not " "enough data (%u octets) for that many realms", num, (unsigned int) left); return NULL; } realm = os_calloc(num, sizeof(struct nai_realm)); if (realm == NULL) return NULL; for (i = 0; i < num; i++) { pos = nai_realm_parse_realm(&realm[i], pos, end); if (pos == NULL) { nai_realm_free(realm, num); return NULL; } } *count = num; return realm; } static int nai_realm_match(struct nai_realm *realm, const char *home_realm) { char *tmp, *pos, *end; int match = 0; if (realm->realm == NULL || home_realm == NULL) return 0; if (os_strchr(realm->realm, ';') == NULL) return os_strcasecmp(realm->realm, home_realm) == 0; tmp = os_strdup(realm->realm); if (tmp == NULL) return 0; pos = tmp; while (*pos) { end = os_strchr(pos, ';'); if (end) *end = '\0'; if (os_strcasecmp(pos, home_realm) == 0) { match = 1; break; } if (end == NULL) break; pos = end + 1; } os_free(tmp); return match; } static int nai_realm_cred_username(struct wpa_supplicant *wpa_s, struct nai_realm_eap *eap) { if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-username: EAP method not supported: %d", eap->method); return 0; /* method not supported */ } if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP && eap->method != EAP_TYPE_FAST) { /* Only tunneled methods with username/password supported */ wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-username: Method: %d is not TTLS, PEAP, or FAST", eap->method); return 0; } if (eap->method == EAP_TYPE_PEAP || eap->method == EAP_TYPE_FAST) { if (eap->inner_method && eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-username: PEAP/FAST: Inner method not supported: %d", eap->inner_method); return 0; } if (!eap->inner_method && eap_get_name(EAP_VENDOR_IETF, EAP_TYPE_MSCHAPV2) == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-username: MSCHAPv2 not supported"); return 0; } } if (eap->method == EAP_TYPE_TTLS) { if (eap->inner_method == 0 && eap->inner_non_eap == 0) return 1; /* Assume TTLS/MSCHAPv2 is used */ if (eap->inner_method && eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-username: TTLS, but inner not supported: %d", eap->inner_method); return 0; } if (eap->inner_non_eap && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP && eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-username: TTLS, inner-non-eap not supported: %d", eap->inner_non_eap); return 0; } } if (eap->inner_method && eap->inner_method != EAP_TYPE_GTC && eap->inner_method != EAP_TYPE_MSCHAPV2) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-username: inner-method not GTC or MSCHAPv2: %d", eap->inner_method); return 0; } return 1; } static int nai_realm_cred_cert(struct wpa_supplicant *wpa_s, struct nai_realm_eap *eap) { if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-cert: Method not supported: %d", eap->method); return 0; /* method not supported */ } if (eap->method != EAP_TYPE_TLS) { /* Only EAP-TLS supported for credential authentication */ wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-cred-cert: Method not TLS: %d", eap->method); return 0; } return 1; } static struct nai_realm_eap * nai_realm_find_eap(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct nai_realm *realm) { u8 e; if (cred->username == NULL || cred->username[0] == '\0' || ((cred->password == NULL || cred->password[0] == '\0') && (cred->private_key == NULL || cred->private_key[0] == '\0') && (!cred->key_id || cred->key_id[0] == '\0'))) { wpa_msg(wpa_s, MSG_DEBUG, "nai-realm-find-eap: incomplete cred info: username: %s password: %s private_key: %s key_id: %s", cred->username ? cred->username : "NULL", cred->password ? cred->password : "NULL", cred->private_key ? cred->private_key : "NULL", cred->key_id ? cred->key_id : "NULL"); return NULL; } for (e = 0; e < realm->eap_count; e++) { struct nai_realm_eap *eap = &realm->eap[e]; if (cred->password && cred->password[0] && nai_realm_cred_username(wpa_s, eap)) return eap; if (((cred->private_key && cred->private_key[0]) || (cred->key_id && cred->key_id[0])) && nai_realm_cred_cert(wpa_s, eap)) return eap; } return NULL; } #ifdef INTERWORKING_3GPP static int plmn_id_match(struct wpabuf *anqp, const char *imsi, int mnc_len) { u8 plmn[3], plmn2[3]; const u8 *pos, *end; u8 udhl; /* * See Annex A of 3GPP TS 24.234 v8.1.0 for description. The network * operator is allowed to include only two digits of the MNC, so allow * matches based on both two and three digit MNC assumptions. Since some * SIM/USIM cards may not expose MNC length conveniently, we may be * provided the default MNC length 3 here and as such, checking with MNC * length 2 is justifiable even though 3GPP TS 24.234 does not mention * that case. Anyway, MCC/MNC pair where both 2 and 3 digit MNC is used * with otherwise matching values would not be good idea in general, so * this should not result in selecting incorrect networks. */ /* Match with 3 digit MNC */ plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); plmn[1] = (imsi[2] - '0') | ((imsi[5] - '0') << 4); plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); /* Match with 2 digit MNC */ plmn2[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4); plmn2[1] = (imsi[2] - '0') | 0xf0; plmn2[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4); if (anqp == NULL) return 0; pos = wpabuf_head_u8(anqp); end = pos + wpabuf_len(anqp); if (end - pos < 2) return 0; if (*pos != 0) { wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos); return 0; } pos++; udhl = *pos++; if (udhl > end - pos) { wpa_printf(MSG_DEBUG, "Invalid UDHL"); return 0; } end = pos + udhl; wpa_printf(MSG_DEBUG, "Interworking: Matching against MCC/MNC alternatives: %02x:%02x:%02x or %02x:%02x:%02x (IMSI %s, MNC length %d)", plmn[0], plmn[1], plmn[2], plmn2[0], plmn2[1], plmn2[2], imsi, mnc_len); while (end - pos >= 2) { u8 iei, len; const u8 *l_end; iei = *pos++; len = *pos++ & 0x7f; if (len > end - pos) break; l_end = pos + len; if (iei == 0 && len > 0) { /* PLMN List */ u8 num, i; wpa_hexdump(MSG_DEBUG, "Interworking: PLMN List information element", pos, len); num = *pos++; for (i = 0; i < num; i++) { if (l_end - pos < 3) break; if (os_memcmp(pos, plmn, 3) == 0 || os_memcmp(pos, plmn2, 3) == 0) return 1; /* Found matching PLMN */ pos += 3; } } else { wpa_hexdump(MSG_DEBUG, "Interworking: Unrecognized 3GPP information element", pos, len); } pos = l_end; } return 0; } static int build_root_nai(char *nai, size_t nai_len, const char *imsi, size_t mnc_len, char prefix) { const char *sep, *msin; char *end, *pos; size_t msin_len, plmn_len; /* * TS 23.003, Clause 14 (3GPP to WLAN Interworking) * Root NAI: * @wlan.mnc.mcc.3gppnetwork.org * is zero-padded to three digits in case two-digit MNC is used */ if (imsi == NULL || os_strlen(imsi) > 16) { wpa_printf(MSG_DEBUG, "No valid IMSI available"); return -1; } sep = os_strchr(imsi, '-'); if (sep) { plmn_len = sep - imsi; msin = sep + 1; } else if (mnc_len && os_strlen(imsi) >= 3 + mnc_len) { plmn_len = 3 + mnc_len; msin = imsi + plmn_len; } else return -1; if (plmn_len != 5 && plmn_len != 6) return -1; msin_len = os_strlen(msin); pos = nai; end = nai + nai_len; if (prefix) *pos++ = prefix; os_memcpy(pos, imsi, plmn_len); pos += plmn_len; os_memcpy(pos, msin, msin_len); pos += msin_len; pos += os_snprintf(pos, end - pos, "@wlan.mnc"); if (plmn_len == 5) { *pos++ = '0'; *pos++ = imsi[3]; *pos++ = imsi[4]; } else { *pos++ = imsi[3]; *pos++ = imsi[4]; *pos++ = imsi[5]; } os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org", imsi[0], imsi[1], imsi[2]); return 0; } static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix) { char nai[100]; if (build_root_nai(nai, sizeof(nai), imsi, 0, prefix) < 0) return -1; return wpa_config_set_quoted(ssid, "identity", nai); } #endif /* INTERWORKING_3GPP */ static int already_connected(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { struct wpa_ssid *ssid, *sel_ssid; struct wpa_bss *selected; if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL) return 0; ssid = wpa_s->current_ssid; if (ssid->parent_cred != cred) return 0; if (ssid->ssid_len != bss->ssid_len || os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) return 0; sel_ssid = NULL; selected = wpa_supplicant_pick_network(wpa_s, &sel_ssid); if (selected && sel_ssid && sel_ssid->priority > ssid->priority) return 0; /* higher priority network in scan results */ return 1; } static void remove_duplicate_network(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { struct wpa_ssid *ssid; for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { if (ssid->parent_cred != cred) continue; if (ssid->ssid_len != bss->ssid_len || os_memcmp(ssid->ssid, bss->ssid, bss->ssid_len) != 0) continue; break; } if (ssid == NULL) return; wpa_printf(MSG_DEBUG, "Interworking: Remove duplicate network entry for the same credential"); if (ssid == wpa_s->current_ssid) { wpa_sm_set_config(wpa_s->wpa, NULL); eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); wpa_s->own_disconnect_req = 1; wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING); } wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); } static int interworking_set_hs20_params(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) { const char *key_mgmt = NULL; #ifdef CONFIG_IEEE80211R int res; struct wpa_driver_capa capa; res = wpa_drv_get_capa(wpa_s, &capa); if (res == 0 && capa.key_mgmt_iftype[WPA_IF_STATION] & WPA_DRIVER_CAPA_KEY_MGMT_FT) { key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ? "WPA-EAP WPA-EAP-SHA256 FT-EAP" : "WPA-EAP FT-EAP"; } #endif /* CONFIG_IEEE80211R */ if (!key_mgmt) key_mgmt = wpa_s->conf->pmf != NO_MGMT_FRAME_PROTECTION ? "WPA-EAP WPA-EAP-SHA256" : "WPA-EAP"; if (wpa_config_set(ssid, "key_mgmt", key_mgmt, 0) < 0 || wpa_config_set(ssid, "proto", "RSN", 0) < 0 || wpa_config_set(ssid, "ieee80211w", wpa_s->conf->pmf == MGMT_FRAME_PROTECTION_REQUIRED ? "2" : "1", 0) < 0 || wpa_config_set(ssid, "pairwise", "CCMP", 0) < 0) return -1; return 0; } static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss, int only_add) { #ifdef INTERWORKING_3GPP struct wpa_ssid *ssid; int eap_type; int res; char prefix; if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) return -1; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)", MAC2STR(bss->bssid)); if (already_connected(wpa_s, cred, bss)) { wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, MAC2STR(bss->bssid)); return wpa_s->current_ssid->id; } remove_duplicate_network(wpa_s, cred, bss); ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) return -1; ssid->parent_cred = cred; wpas_notify_network_added(wpa_s, ssid); wpa_config_set_network_defaults(ssid); ssid->priority = cred->priority; ssid->temporary = 1; ssid->ssid = os_zalloc(bss->ssid_len + 1); if (ssid->ssid == NULL) goto fail; os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); ssid->ssid_len = bss->ssid_len; ssid->eap.sim_num = cred->sim_num; if (interworking_set_hs20_params(wpa_s, ssid) < 0) goto fail; eap_type = EAP_TYPE_SIM; if (cred->pcsc && wpa_s->scard && scard_supports_umts(wpa_s->scard)) eap_type = EAP_TYPE_AKA; if (cred->eap_method && cred->eap_method[0].vendor == EAP_VENDOR_IETF) { if (cred->eap_method[0].method == EAP_TYPE_SIM || cred->eap_method[0].method == EAP_TYPE_AKA || cred->eap_method[0].method == EAP_TYPE_AKA_PRIME) eap_type = cred->eap_method[0].method; } switch (eap_type) { case EAP_TYPE_SIM: prefix = '1'; res = wpa_config_set(ssid, "eap", "SIM", 0); break; case EAP_TYPE_AKA: prefix = '0'; res = wpa_config_set(ssid, "eap", "AKA", 0); break; case EAP_TYPE_AKA_PRIME: prefix = '6'; res = wpa_config_set(ssid, "eap", "AKA'", 0); break; default: res = -1; break; } if (res < 0) { wpa_msg(wpa_s, MSG_DEBUG, "Selected EAP method (%d) not supported", eap_type); goto fail; } if (!cred->pcsc && set_root_nai(ssid, cred->imsi, prefix) < 0) { wpa_msg(wpa_s, MSG_DEBUG, "Failed to set Root NAI"); goto fail; } if (cred->milenage && cred->milenage[0]) { if (wpa_config_set_quoted(ssid, "password", cred->milenage) < 0) goto fail; } else if (cred->pcsc) { if (wpa_config_set_quoted(ssid, "pcsc", "") < 0) goto fail; if (wpa_s->conf->pcsc_pin && wpa_config_set_quoted(ssid, "pin", wpa_s->conf->pcsc_pin) < 0) goto fail; } if (cred->imsi_privacy_cert && cred->imsi_privacy_cert[0]) { if (wpa_config_set_quoted(ssid, "imsi_privacy_cert", cred->imsi_privacy_cert) < 0) goto fail; } if (cred->imsi_privacy_attr && cred->imsi_privacy_attr[0]) { if (wpa_config_set_quoted(ssid, "imsi_privacy_attr", cred->imsi_privacy_attr) < 0) goto fail; } wpa_s->next_ssid = ssid; wpa_config_update_prio_list(wpa_s->conf); if (!only_add) interworking_reconnect(wpa_s); return ssid->id; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); #endif /* INTERWORKING_3GPP */ return -1; } static int oi_element_match(const u8 *ie, const u8 *oi, size_t oi_len) { const u8 *pos, *end; u8 lens; if (ie == NULL) return 0; pos = ie + 2; end = ie + 2 + ie[1]; /* Roaming Consortium element: * Number of ANQP OIs * OI #1 and #2 lengths * OI #1, [OI #2], [OI #3] */ if (end - pos < 2) return 0; pos++; /* skip Number of ANQP OIs */ lens = *pos++; if ((lens & 0x0f) + (lens >> 4) > end - pos) return 0; if ((lens & 0x0f) == oi_len && os_memcmp(pos, oi, oi_len) == 0) return 1; pos += lens & 0x0f; if ((lens >> 4) == oi_len && os_memcmp(pos, oi, oi_len) == 0) return 1; pos += lens >> 4; if (pos < end && (size_t) (end - pos) == oi_len && os_memcmp(pos, oi, oi_len) == 0) return 1; return 0; } static int oi_anqp_match(const struct wpabuf *anqp, const u8 *oi, size_t oi_len) { const u8 *pos, *end; u8 len; if (anqp == NULL) return 0; pos = wpabuf_head(anqp); end = pos + wpabuf_len(anqp); /* Set of duples */ while (pos < end) { len = *pos++; if (len > end - pos) break; if (len == oi_len && os_memcmp(pos, oi, oi_len) == 0) return 1; pos += len; } return 0; } static int oi_match(const u8 *ie, const struct wpabuf *anqp, const u8 *oi, size_t oi_len) { return oi_element_match(ie, oi, oi_len) || oi_anqp_match(anqp, oi, oi_len); } static int cred_home_ois_match(const u8 *ie, const struct wpabuf *anqp, const struct wpa_cred *cred) { unsigned int i; /* There's a match if at least one of the home OI matches. */ for (i = 0; i < cred->num_home_ois; i++) { if (oi_match(ie, anqp, cred->home_ois[i], cred->home_ois_len[i])) return 1; } return 0; } static int cred_roaming_consortiums_match(const u8 *ie, const struct wpabuf *anqp, const struct wpa_cred *cred) { unsigned int i; for (i = 0; i < cred->num_roaming_consortiums; i++) { if (oi_match(ie, anqp, cred->roaming_consortiums[i], cred->roaming_consortiums_len[i])) return 1; } return 0; } static int cred_no_required_oi_match(struct wpa_cred *cred, struct wpa_bss *bss) { const u8 *ie; unsigned int i; if (cred->num_required_home_ois == 0) return 0; ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); if (ie == NULL && (bss->anqp == NULL || bss->anqp->roaming_consortium == NULL)) return 1; /* According to Passpoint specification, there must be a match for * each required home OI provided. */ for (i = 0; i < cred->num_required_home_ois; i++) { if (!oi_match(ie, bss->anqp ? bss->anqp->roaming_consortium : NULL, cred->required_home_ois[i], cred->required_home_ois_len[i])) return 1; } return 0; } static int cred_excluded_ssid(struct wpa_cred *cred, struct wpa_bss *bss) { size_t i; if (!cred->excluded_ssid) return 0; for (i = 0; i < cred->num_excluded_ssid; i++) { struct excluded_ssid *e = &cred->excluded_ssid[i]; if (bss->ssid_len == e->ssid_len && os_memcmp(bss->ssid, e->ssid, e->ssid_len) == 0) return 1; } return 0; } static int cred_below_min_backhaul(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { #ifdef CONFIG_HS20 int res; unsigned int dl_bandwidth, ul_bandwidth; const u8 *wan; u8 wan_info, dl_load, ul_load; u16 lmd; u32 ul_speed, dl_speed; if (!cred->min_dl_bandwidth_home && !cred->min_ul_bandwidth_home && !cred->min_dl_bandwidth_roaming && !cred->min_ul_bandwidth_roaming) return 0; /* No bandwidth constraint specified */ if (bss->anqp == NULL || bss->anqp->hs20_wan_metrics == NULL) return 0; /* No WAN Metrics known - ignore constraint */ wan = wpabuf_head(bss->anqp->hs20_wan_metrics); wan_info = wan[0]; if (wan_info & BIT(3)) return 1; /* WAN link at capacity */ lmd = WPA_GET_LE16(wan + 11); if (lmd == 0) return 0; /* Downlink/Uplink Load was not measured */ dl_speed = WPA_GET_LE32(wan + 1); ul_speed = WPA_GET_LE32(wan + 5); dl_load = wan[9]; ul_load = wan[10]; if (dl_speed >= 0xffffff) dl_bandwidth = dl_speed / 255 * (255 - dl_load); else dl_bandwidth = dl_speed * (255 - dl_load) / 255; if (ul_speed >= 0xffffff) ul_bandwidth = ul_speed / 255 * (255 - ul_load); else ul_bandwidth = ul_speed * (255 - ul_load) / 255; res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? bss->anqp->domain_name : NULL); if (res > 0) { if (cred->min_dl_bandwidth_home > dl_bandwidth) return 1; if (cred->min_ul_bandwidth_home > ul_bandwidth) return 1; } else { if (cred->min_dl_bandwidth_roaming > dl_bandwidth) return 1; if (cred->min_ul_bandwidth_roaming > ul_bandwidth) return 1; } #endif /* CONFIG_HS20 */ return 0; } static int cred_over_max_bss_load(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { const u8 *ie; int res; if (!cred->max_bss_load) return 0; /* No BSS Load constraint specified */ ie = wpa_bss_get_ie(bss, WLAN_EID_BSS_LOAD); if (ie == NULL || ie[1] < 3) return 0; /* No BSS Load advertised */ res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? bss->anqp->domain_name : NULL); if (res <= 0) return 0; /* Not a home network */ return ie[4] > cred->max_bss_load; } #ifdef CONFIG_HS20 static int has_proto_match(const u8 *pos, const u8 *end, u8 proto) { while (end - pos >= 4) { if (pos[0] == proto && pos[3] == 1 /* Open */) return 1; pos += 4; } return 0; } static int has_proto_port_match(const u8 *pos, const u8 *end, u8 proto, u16 port) { while (end - pos >= 4) { if (pos[0] == proto && WPA_GET_LE16(&pos[1]) == port && pos[3] == 1 /* Open */) return 1; pos += 4; } return 0; } #endif /* CONFIG_HS20 */ static int cred_conn_capab_missing(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { #ifdef CONFIG_HS20 int res; const u8 *capab, *end; unsigned int i, j; int *ports; if (!cred->num_req_conn_capab) return 0; /* No connection capability constraint specified */ if (bss->anqp == NULL || bss->anqp->hs20_connection_capability == NULL) return 0; /* No Connection Capability known - ignore constraint */ res = interworking_home_sp_cred(wpa_s, cred, bss->anqp ? bss->anqp->domain_name : NULL); if (res > 0) return 0; /* No constraint in home network */ capab = wpabuf_head(bss->anqp->hs20_connection_capability); end = capab + wpabuf_len(bss->anqp->hs20_connection_capability); for (i = 0; i < cred->num_req_conn_capab; i++) { ports = cred->req_conn_capab_port[i]; if (!ports) { if (!has_proto_match(capab, end, cred->req_conn_capab_proto[i])) return 1; } else { for (j = 0; ports[j] > -1; j++) { if (!has_proto_port_match( capab, end, cred->req_conn_capab_proto[i], ports[j])) return 1; } } } #endif /* CONFIG_HS20 */ return 0; } static struct wpa_cred * interworking_credentials_available_roaming_consortium( struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, int *excluded) { struct wpa_cred *cred, *selected = NULL; const u8 *ie; const struct wpabuf *anqp; int is_excluded = 0; ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); anqp = bss->anqp ? bss->anqp->roaming_consortium : NULL; if (!ie && !anqp) return NULL; if (wpa_s->conf->cred == NULL) return NULL; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->num_home_ois == 0 && cred->num_required_home_ois == 0 && cred->num_roaming_consortiums == 0) continue; if (!cred->eap_method) continue; /* If there's required home OIs, there must be a match for each * required OI (see Passpoint v3.2 - 9.1.2 - RequiredHomeOI). */ if (cred->num_required_home_ois > 0 && cred_no_required_oi_match(cred, bss)) continue; if (!cred_home_ois_match(ie, anqp, cred) && !cred_roaming_consortiums_match(ie, anqp, cred)) continue; if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss)) continue; if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss)) continue; if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss)) continue; if (cred_excluded_ssid(cred, bss)) { if (excluded == NULL) continue; if (selected == NULL) { selected = cred; is_excluded = 1; } } else { if (selected == NULL || is_excluded || cred_prio_cmp(selected, cred) < 0) { selected = cred; is_excluded = 0; } } } if (excluded) *excluded = is_excluded; return selected; } static int interworking_set_eap_params(struct wpa_ssid *ssid, struct wpa_cred *cred, int ttls) { if (cred->eap_method) { ttls = cred->eap_method->vendor == EAP_VENDOR_IETF && cred->eap_method->method == EAP_TYPE_TTLS; os_free(ssid->eap.eap_methods); ssid->eap.eap_methods = os_malloc(sizeof(struct eap_method_type) * 2); if (ssid->eap.eap_methods == NULL) return -1; os_memcpy(ssid->eap.eap_methods, cred->eap_method, sizeof(*cred->eap_method)); ssid->eap.eap_methods[1].vendor = EAP_VENDOR_IETF; ssid->eap.eap_methods[1].method = EAP_TYPE_NONE; } if (ttls && cred->username && cred->username[0]) { const char *pos; char *anon; /* Use anonymous NAI in Phase 1 */ pos = os_strchr(cred->username, '@'); if (pos) { size_t buflen = 9 + os_strlen(pos) + 1; anon = os_malloc(buflen); if (anon == NULL) return -1; os_snprintf(anon, buflen, "anonymous%s", pos); } else if (cred->realm) { size_t buflen = 10 + os_strlen(cred->realm) + 1; anon = os_malloc(buflen); if (anon == NULL) return -1; os_snprintf(anon, buflen, "anonymous@%s", cred->realm); } else { anon = os_strdup("anonymous"); if (anon == NULL) return -1; } if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) < 0) { os_free(anon); return -1; } os_free(anon); } if (!ttls && cred->username && cred->username[0] && cred->realm && !os_strchr(cred->username, '@')) { char *id; size_t buflen; int res; buflen = os_strlen(cred->username) + 1 + os_strlen(cred->realm) + 1; id = os_malloc(buflen); if (!id) return -1; os_snprintf(id, buflen, "%s@%s", cred->username, cred->realm); res = wpa_config_set_quoted(ssid, "identity", id); os_free(id); if (res < 0) return -1; } else if (cred->username && cred->username[0] && wpa_config_set_quoted(ssid, "identity", cred->username) < 0) return -1; if (cred->password && cred->password[0]) { if (cred->ext_password && wpa_config_set(ssid, "password", cred->password, 0) < 0) return -1; if (!cred->ext_password && wpa_config_set_quoted(ssid, "password", cred->password) < 0) return -1; } if (cred->client_cert && cred->client_cert[0] && wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0) return -1; #ifdef ANDROID if (cred->private_key && os_strncmp(cred->private_key, "keystore://", 11) == 0) { /* Use OpenSSL engine configuration for Android keystore */ if (wpa_config_set_quoted(ssid, "engine_id", "keystore") < 0 || wpa_config_set_quoted(ssid, "key_id", cred->private_key + 11) < 0 || wpa_config_set(ssid, "engine", "1", 0) < 0) return -1; } else #endif /* ANDROID */ if (cred->private_key && cred->private_key[0] && wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0) return -1; if (cred->private_key_passwd && cred->private_key_passwd[0] && wpa_config_set_quoted(ssid, "private_key_passwd", cred->private_key_passwd) < 0) return -1; if (cred->ca_cert_id && cred->ca_cert_id[0] && wpa_config_set_quoted(ssid, "ca_cert_id", cred->ca_cert_id) < 0) return -1; if (cred->cert_id && cred->cert_id[0] && wpa_config_set_quoted(ssid, "cert_id", cred->cert_id) < 0) return -1; if (cred->key_id && cred->key_id[0] && wpa_config_set_quoted(ssid, "key_id", cred->key_id) < 0) return -1; if (cred->engine_id && cred->engine_id[0] && wpa_config_set_quoted(ssid, "engine_id", cred->engine_id) < 0) return -1; ssid->eap.cert.engine = cred->engine; if (cred->phase1) { os_free(ssid->eap.phase1); ssid->eap.phase1 = os_strdup(cred->phase1); } if (cred->phase2) { os_free(ssid->eap.phase2); ssid->eap.phase2 = os_strdup(cred->phase2); } if (cred->ca_cert && cred->ca_cert[0] && wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0) return -1; if (cred->domain_suffix_match && cred->domain_suffix_match[0] && wpa_config_set_quoted(ssid, "domain_suffix_match", cred->domain_suffix_match) < 0) return -1; ssid->eap.cert.ocsp = cred->ocsp; return 0; } static int interworking_connect_roaming_consortium( struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss, int only_add) { struct wpa_ssid *ssid; const u8 *ie; const struct wpabuf *anqp; unsigned int i; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR " based on roaming consortium match", MAC2STR(bss->bssid)); if (already_connected(wpa_s, cred, bss)) { wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, MAC2STR(bss->bssid)); return wpa_s->current_ssid->id; } remove_duplicate_network(wpa_s, cred, bss); ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) return -1; ssid->parent_cred = cred; wpas_notify_network_added(wpa_s, ssid); wpa_config_set_network_defaults(ssid); ssid->priority = cred->priority; ssid->temporary = 1; ssid->ssid = os_zalloc(bss->ssid_len + 1); if (ssid->ssid == NULL) goto fail; os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); ssid->ssid_len = bss->ssid_len; if (interworking_set_hs20_params(wpa_s, ssid) < 0) goto fail; ie = wpa_bss_get_ie(bss, WLAN_EID_ROAMING_CONSORTIUM); anqp = bss->anqp ? bss->anqp->roaming_consortium : NULL; for (i = 0; (ie || anqp) && i < cred->num_roaming_consortiums; i++) { if (!oi_match(ie, anqp, cred->roaming_consortiums[i], cred->roaming_consortiums_len[i])) continue; ssid->roaming_consortium_selection = os_malloc(cred->roaming_consortiums_len[i]); if (!ssid->roaming_consortium_selection) goto fail; os_memcpy(ssid->roaming_consortium_selection, cred->roaming_consortiums[i], cred->roaming_consortiums_len[i]); ssid->roaming_consortium_selection_len = cred->roaming_consortiums_len[i]; break; } if (cred->eap_method == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: No EAP method set for credential using roaming consortium"); goto fail; } if (interworking_set_eap_params( ssid, cred, cred->eap_method->vendor == EAP_VENDOR_IETF && cred->eap_method->method == EAP_TYPE_TTLS) < 0) goto fail; wpa_s->next_ssid = ssid; wpa_config_update_prio_list(wpa_s->conf); if (!only_add) interworking_reconnect(wpa_s); return ssid->id; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); return -1; } int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int only_add) { struct wpa_cred *cred, *cred_rc, *cred_3gpp; struct wpa_ssid *ssid; struct nai_realm *realm; struct nai_realm_eap *eap = NULL; u16 count, i; char buf[100]; int excluded = 0, *excl = &excluded; const char *name; if (wpa_s->conf->cred == NULL || bss == NULL) return -1; if (disallowed_bssid(wpa_s, bss->bssid) || disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Reject connection to disallowed BSS " MACSTR, MAC2STR(bss->bssid)); return -1; } wpa_printf(MSG_DEBUG, "Interworking: Considering BSS " MACSTR " for connection", MAC2STR(bss->bssid)); if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { /* * We currently support only HS 2.0 networks and those are * required to use WPA2-Enterprise. */ wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Network does not use RSN"); return -1; } cred_rc = interworking_credentials_available_roaming_consortium( wpa_s, bss, 0, excl); if (cred_rc) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d", cred_rc->priority, cred_rc->sp_priority); if (excl && !(*excl)) excl = NULL; } cred = interworking_credentials_available_realm(wpa_s, bss, 0, excl); if (cred) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d", cred->priority, cred->sp_priority); if (excl && !(*excl)) excl = NULL; } cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 0, excl); if (cred_3gpp) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Highest 3GPP matching credential priority %d sp_priority %d", cred_3gpp->priority, cred_3gpp->sp_priority); if (excl && !(*excl)) excl = NULL; } if (!cred_rc && !cred && !cred_3gpp) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: No full credential matches - consider options without BW(etc.) limits"); cred_rc = interworking_credentials_available_roaming_consortium( wpa_s, bss, 1, excl); if (cred_rc) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Highest roaming consortium matching credential priority %d sp_priority %d (ignore BW)", cred_rc->priority, cred_rc->sp_priority); if (excl && !(*excl)) excl = NULL; } cred = interworking_credentials_available_realm(wpa_s, bss, 1, excl); if (cred) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Highest NAI Realm list matching credential priority %d sp_priority %d (ignore BW)", cred->priority, cred->sp_priority); if (excl && !(*excl)) excl = NULL; } cred_3gpp = interworking_credentials_available_3gpp(wpa_s, bss, 1, excl); if (cred_3gpp) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Highest 3GPP matching credential priority %d sp_priority %d (ignore BW)", cred_3gpp->priority, cred_3gpp->sp_priority); if (excl && !(*excl)) excl = NULL; } } if (cred_rc && (cred == NULL || cred_prio_cmp(cred_rc, cred) >= 0) && (cred_3gpp == NULL || cred_prio_cmp(cred_rc, cred_3gpp) >= 0)) return interworking_connect_roaming_consortium(wpa_s, cred_rc, bss, only_add); if (cred_3gpp && (cred == NULL || cred_prio_cmp(cred_3gpp, cred) >= 0)) { return interworking_connect_3gpp(wpa_s, cred_3gpp, bss, only_add); } if (cred == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: No matching credentials found for " MACSTR, MAC2STR(bss->bssid)); return -1; } realm = nai_realm_parse(bss->anqp ? bss->anqp->nai_realm : NULL, &count); if (realm == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Could not parse NAI Realm list from " MACSTR, MAC2STR(bss->bssid)); return -1; } for (i = 0; i < count; i++) { if (!nai_realm_match(&realm[i], cred->realm)) continue; eap = nai_realm_find_eap(wpa_s, cred, &realm[i]); if (eap) break; } if (!eap) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: No matching credentials and EAP method found for " MACSTR, MAC2STR(bss->bssid)); nai_realm_free(realm, count); return -1; } wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Connect with " MACSTR, MAC2STR(bss->bssid)); if (already_connected(wpa_s, cred, bss)) { wpa_msg(wpa_s, MSG_INFO, INTERWORKING_ALREADY_CONNECTED MACSTR, MAC2STR(bss->bssid)); nai_realm_free(realm, count); return 0; } remove_duplicate_network(wpa_s, cred, bss); ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) { nai_realm_free(realm, count); return -1; } ssid->parent_cred = cred; wpas_notify_network_added(wpa_s, ssid); wpa_config_set_network_defaults(ssid); ssid->priority = cred->priority; ssid->temporary = 1; ssid->ssid = os_zalloc(bss->ssid_len + 1); if (ssid->ssid == NULL) goto fail; os_memcpy(ssid->ssid, bss->ssid, bss->ssid_len); ssid->ssid_len = bss->ssid_len; if (interworking_set_hs20_params(wpa_s, ssid) < 0) goto fail; if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF, eap->method), 0) < 0) goto fail; switch (eap->method) { case EAP_TYPE_TTLS: if (eap->inner_method) { name = eap_get_name(EAP_VENDOR_IETF, eap->inner_method); if (!name) goto fail; os_snprintf(buf, sizeof(buf), "\"autheap=%s\"", name); if (wpa_config_set(ssid, "phase2", buf, 0) < 0) goto fail; break; } switch (eap->inner_non_eap) { case NAI_REALM_INNER_NON_EAP_PAP: if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) < 0) goto fail; break; case NAI_REALM_INNER_NON_EAP_CHAP: if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0) < 0) goto fail; break; case NAI_REALM_INNER_NON_EAP_MSCHAP: if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"", 0) < 0) goto fail; break; case NAI_REALM_INNER_NON_EAP_MSCHAPV2: if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 0) < 0) goto fail; break; default: /* EAP params were not set - assume TTLS/MSCHAPv2 */ if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"", 0) < 0) goto fail; break; } break; case EAP_TYPE_PEAP: case EAP_TYPE_FAST: if (wpa_config_set(ssid, "phase1", "\"fast_provisioning=2\"", 0) < 0) goto fail; if (wpa_config_set(ssid, "pac_file", "\"blob://pac_interworking\"", 0) < 0) goto fail; name = eap_get_name(EAP_VENDOR_IETF, eap->inner_method ? eap->inner_method : EAP_TYPE_MSCHAPV2); if (name == NULL) goto fail; os_snprintf(buf, sizeof(buf), "\"auth=%s\"", name); if (wpa_config_set(ssid, "phase2", buf, 0) < 0) goto fail; break; case EAP_TYPE_TLS: break; } if (interworking_set_eap_params(ssid, cred, eap->method == EAP_TYPE_TTLS) < 0) goto fail; nai_realm_free(realm, count); wpa_s->next_ssid = ssid; wpa_config_update_prio_list(wpa_s->conf); if (!only_add) interworking_reconnect(wpa_s); return ssid->id; fail: wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); nai_realm_free(realm, count); return -1; } #ifdef PCSC_FUNCS static int interworking_pcsc_read_imsi(struct wpa_supplicant *wpa_s) { size_t len; if (wpa_s->imsi[0] && wpa_s->mnc_len) return 0; len = sizeof(wpa_s->imsi) - 1; if (scard_get_imsi(wpa_s->scard, wpa_s->imsi, &len)) { scard_deinit(wpa_s->scard); wpa_s->scard = NULL; wpa_msg(wpa_s, MSG_ERROR, "Could not read IMSI"); return -1; } wpa_s->imsi[len] = '\0'; wpa_s->mnc_len = scard_get_mnc_len(wpa_s->scard); wpa_printf(MSG_DEBUG, "SCARD: IMSI %s (MNC length %d)", wpa_s->imsi, wpa_s->mnc_len); return 0; } #endif /* PCSC_FUNCS */ static struct wpa_cred * interworking_credentials_available_3gpp( struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, int *excluded) { struct wpa_cred *selected = NULL; #ifdef INTERWORKING_3GPP struct wpa_cred *cred; int ret; int is_excluded = 0; if (bss->anqp == NULL || bss->anqp->anqp_3gpp == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "interworking-avail-3gpp: not avail, anqp: %p anqp_3gpp: %p", bss->anqp, bss->anqp ? bss->anqp->anqp_3gpp : NULL); return NULL; } #ifdef CONFIG_EAP_PROXY if (!wpa_s->imsi[0]) { size_t len; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: IMSI not available - try to read again through eap_proxy"); wpa_s->mnc_len = eapol_sm_get_eap_proxy_imsi(wpa_s->eapol, -1, wpa_s->imsi, &len); if (wpa_s->mnc_len > 0) { wpa_s->imsi[len] = '\0'; wpa_msg(wpa_s, MSG_DEBUG, "eap_proxy: IMSI %s (MNC length %d)", wpa_s->imsi, wpa_s->mnc_len); } else { wpa_msg(wpa_s, MSG_DEBUG, "eap_proxy: IMSI not available"); } } #endif /* CONFIG_EAP_PROXY */ for (cred = wpa_s->conf->cred; cred; cred = cred->next) { char *sep; const char *imsi; int mnc_len; char imsi_buf[16]; size_t msin_len; #ifdef PCSC_FUNCS if (cred->pcsc && wpa_s->scard) { if (interworking_pcsc_read_imsi(wpa_s) < 0) continue; imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; goto compare; } #endif /* PCSC_FUNCS */ #ifdef CONFIG_EAP_PROXY if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; goto compare; } #endif /* CONFIG_EAP_PROXY */ if (cred->imsi == NULL || !cred->imsi[0] || (!wpa_s->conf->external_sim && (cred->milenage == NULL || !cred->milenage[0]))) continue; sep = os_strchr(cred->imsi, '-'); if (sep == NULL || (sep - cred->imsi != 5 && sep - cred->imsi != 6)) continue; mnc_len = sep - cred->imsi - 3; os_memcpy(imsi_buf, cred->imsi, 3 + mnc_len); sep++; msin_len = os_strlen(cred->imsi); if (3 + mnc_len + msin_len >= sizeof(imsi_buf) - 1) msin_len = sizeof(imsi_buf) - 3 - mnc_len - 1; os_memcpy(&imsi_buf[3 + mnc_len], sep, msin_len); imsi_buf[3 + mnc_len + msin_len] = '\0'; imsi = imsi_buf; #if defined(PCSC_FUNCS) || defined(CONFIG_EAP_PROXY) compare: #endif /* PCSC_FUNCS || CONFIG_EAP_PROXY */ wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing 3GPP info from " MACSTR, MAC2STR(bss->bssid)); ret = plmn_id_match(bss->anqp->anqp_3gpp, imsi, mnc_len); wpa_msg(wpa_s, MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not "); if (ret) { if (cred_no_required_oi_match(cred, bss)) continue; if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss)) continue; if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss)) continue; if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss)) continue; if (cred_excluded_ssid(cred, bss)) { if (excluded == NULL) continue; if (selected == NULL) { selected = cred; is_excluded = 1; } } else { if (selected == NULL || is_excluded || cred_prio_cmp(selected, cred) < 0) { selected = cred; is_excluded = 0; } } } } if (excluded) *excluded = is_excluded; #endif /* INTERWORKING_3GPP */ return selected; } static struct wpa_cred * interworking_credentials_available_realm( struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, int *excluded) { struct wpa_cred *cred, *selected = NULL; struct nai_realm *realm; u16 count, i; int is_excluded = 0; if (bss->anqp == NULL || bss->anqp->nai_realm == NULL) return NULL; if (wpa_s->conf->cred == NULL) return NULL; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Parsing NAI Realm list from " MACSTR, MAC2STR(bss->bssid)); realm = nai_realm_parse(bss->anqp->nai_realm, &count); if (realm == NULL) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Could not parse NAI Realm list from " MACSTR, MAC2STR(bss->bssid)); return NULL; } for (cred = wpa_s->conf->cred; cred; cred = cred->next) { if (cred->realm == NULL) continue; for (i = 0; i < count; i++) { if (!nai_realm_match(&realm[i], cred->realm)) continue; if (nai_realm_find_eap(wpa_s, cred, &realm[i])) { if (cred_no_required_oi_match(cred, bss)) continue; if (!ignore_bw && cred_below_min_backhaul(wpa_s, cred, bss)) continue; if (!ignore_bw && cred_over_max_bss_load(wpa_s, cred, bss)) continue; if (!ignore_bw && cred_conn_capab_missing(wpa_s, cred, bss)) continue; if (cred_excluded_ssid(cred, bss)) { if (excluded == NULL) continue; if (selected == NULL) { selected = cred; is_excluded = 1; } } else { if (selected == NULL || is_excluded || cred_prio_cmp(selected, cred) < 0) { selected = cred; is_excluded = 0; } } break; } else { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: realm-find-eap returned false"); } } } nai_realm_free(realm, count); if (excluded) *excluded = is_excluded; return selected; } static struct wpa_cred * interworking_credentials_available_helper( struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int ignore_bw, int *excluded) { struct wpa_cred *cred, *cred2; int excluded1, excluded2 = 0; if (disallowed_bssid(wpa_s, bss->bssid) || disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) { wpa_printf(MSG_DEBUG, "Interworking: Ignore disallowed BSS " MACSTR, MAC2STR(bss->bssid)); return NULL; } cred = interworking_credentials_available_realm(wpa_s, bss, ignore_bw, &excluded1); cred2 = interworking_credentials_available_3gpp(wpa_s, bss, ignore_bw, &excluded2); if (cred && cred2 && (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) { cred = cred2; excluded1 = excluded2; } if (!cred) { cred = cred2; excluded1 = excluded2; } cred2 = interworking_credentials_available_roaming_consortium( wpa_s, bss, ignore_bw, &excluded2); if (cred && cred2 && (cred_prio_cmp(cred2, cred) >= 0 || (!excluded2 && excluded1))) { cred = cred2; excluded1 = excluded2; } if (!cred) { cred = cred2; excluded1 = excluded2; } if (excluded) *excluded = excluded1; return cred; } static struct wpa_cred * interworking_credentials_available( struct wpa_supplicant *wpa_s, struct wpa_bss *bss, int *excluded) { struct wpa_cred *cred; if (excluded) *excluded = 0; cred = interworking_credentials_available_helper(wpa_s, bss, 0, excluded); if (cred) return cred; return interworking_credentials_available_helper(wpa_s, bss, 1, excluded); } int domain_name_list_contains(struct wpabuf *domain_names, const char *domain, int exact_match) { const u8 *pos, *end; size_t len; len = os_strlen(domain); pos = wpabuf_head(domain_names); end = pos + wpabuf_len(domain_names); while (end - pos > 1) { u8 elen; elen = *pos++; if (elen > end - pos) break; wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name", pos, elen); if (elen == len && os_strncasecmp(domain, (const char *) pos, len) == 0) return 1; if (!exact_match && elen > len && pos[elen - len - 1] == '.') { const char *ap = (const char *) pos; int offset = elen - len; if (os_strncasecmp(domain, ap + offset, len) == 0) return 1; } pos += elen; } return 0; } int interworking_home_sp_cred(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpabuf *domain_names) { size_t i; int ret = -1; #ifdef INTERWORKING_3GPP char nai[100], *realm; char *imsi = NULL; int mnc_len = 0; if (cred->imsi) imsi = cred->imsi; #ifdef PCSC_FUNCS else if (cred->pcsc && wpa_s->scard) { if (interworking_pcsc_read_imsi(wpa_s) < 0) return -1; imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; } #endif /* PCSC_FUNCS */ #ifdef CONFIG_EAP_PROXY else if (cred->pcsc && wpa_s->mnc_len > 0 && wpa_s->imsi[0]) { imsi = wpa_s->imsi; mnc_len = wpa_s->mnc_len; } #endif /* CONFIG_EAP_PROXY */ if (domain_names && imsi && build_root_nai(nai, sizeof(nai), imsi, mnc_len, 0) == 0) { realm = os_strchr(nai, '@'); if (realm) realm++; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Search for match with SIM/USIM domain %s", realm ? realm : "[NULL]"); if (realm && domain_name_list_contains(domain_names, realm, 1)) return 1; if (realm) ret = 0; } #endif /* INTERWORKING_3GPP */ if (domain_names == NULL || cred->domain == NULL) return ret; for (i = 0; i < cred->num_domain; i++) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Search for match with home SP FQDN %s", cred->domain[i]); if (domain_name_list_contains(domain_names, cred->domain[i], 1)) return 1; } return 0; } static int interworking_home_sp(struct wpa_supplicant *wpa_s, struct wpabuf *domain_names) { struct wpa_cred *cred; if (domain_names == NULL || wpa_s->conf->cred == NULL) return -1; for (cred = wpa_s->conf->cred; cred; cred = cred->next) { int res = interworking_home_sp_cred(wpa_s, cred, domain_names); if (res) return res; } return 0; } static int interworking_find_network_match(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; struct wpa_ssid *ssid; dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) { if (wpas_network_disabled(wpa_s, ssid) || ssid->mode != WPAS_MODE_INFRA) continue; if (ssid->ssid_len != bss->ssid_len || os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) != 0) continue; /* * TODO: Consider more accurate matching of security * configuration similarly to what is done in events.c */ return 1; } } return 0; } static int roaming_partner_match(struct wpa_supplicant *wpa_s, struct roaming_partner *partner, struct wpabuf *domain_names) { wpa_printf(MSG_DEBUG, "Interworking: Comparing roaming_partner info fqdn='%s' exact_match=%d priority=%u country='%s'", partner->fqdn, partner->exact_match, partner->priority, partner->country); wpa_hexdump_ascii(MSG_DEBUG, "Interworking: Domain names", wpabuf_head(domain_names), wpabuf_len(domain_names)); if (!domain_name_list_contains(domain_names, partner->fqdn, partner->exact_match)) return 0; /* TODO: match Country */ return 1; } static u8 roaming_prio(struct wpa_supplicant *wpa_s, struct wpa_cred *cred, struct wpa_bss *bss) { size_t i; if (bss->anqp == NULL || bss->anqp->domain_name == NULL) { wpa_printf(MSG_DEBUG, "Interworking: No ANQP domain name info -> use default roaming partner priority 128"); return 128; /* cannot check preference with domain name */ } if (interworking_home_sp_cred(wpa_s, cred, bss->anqp->domain_name) > 0) { wpa_printf(MSG_DEBUG, "Interworking: Determined to be home SP -> use maximum preference 0 as roaming partner priority"); return 0; /* max preference for home SP network */ } for (i = 0; i < cred->num_roaming_partner; i++) { if (roaming_partner_match(wpa_s, &cred->roaming_partner[i], bss->anqp->domain_name)) { wpa_printf(MSG_DEBUG, "Interworking: Roaming partner preference match - priority %u", cred->roaming_partner[i].priority); return cred->roaming_partner[i].priority; } } wpa_printf(MSG_DEBUG, "Interworking: No roaming partner preference match - use default roaming partner priority 128"); return 128; } static struct wpa_bss * pick_best_roaming_partner(struct wpa_supplicant *wpa_s, struct wpa_bss *selected, struct wpa_cred *cred) { struct wpa_bss *bss; u8 best_prio, prio; struct wpa_cred *cred2; /* * Check if any other BSS is operated by a more preferred roaming * partner. */ best_prio = roaming_prio(wpa_s, cred, selected); wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for selected BSS " MACSTR " (cred=%d)", best_prio, MAC2STR(selected->bssid), cred->id); dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { if (bss == selected) continue; cred2 = interworking_credentials_available(wpa_s, bss, NULL); if (!cred2) continue; if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) continue; prio = roaming_prio(wpa_s, cred2, bss); wpa_printf(MSG_DEBUG, "Interworking: roaming_prio=%u for BSS " MACSTR " (cred=%d)", prio, MAC2STR(bss->bssid), cred2->id); if (prio < best_prio) { int bh1, bh2, load1, load2, conn1, conn2; bh1 = cred_below_min_backhaul(wpa_s, cred, selected); load1 = cred_over_max_bss_load(wpa_s, cred, selected); conn1 = cred_conn_capab_missing(wpa_s, cred, selected); bh2 = cred_below_min_backhaul(wpa_s, cred2, bss); load2 = cred_over_max_bss_load(wpa_s, cred2, bss); conn2 = cred_conn_capab_missing(wpa_s, cred2, bss); wpa_printf(MSG_DEBUG, "Interworking: old: %d %d %d new: %d %d %d", bh1, load1, conn1, bh2, load2, conn2); if (bh1 || load1 || conn1 || !(bh2 || load2 || conn2)) { wpa_printf(MSG_DEBUG, "Interworking: Better roaming partner " MACSTR " selected", MAC2STR(bss->bssid)); best_prio = prio; selected = bss; } } } return selected; } static void interworking_select_network(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss, *selected = NULL, *selected_home = NULL; struct wpa_bss *selected2 = NULL, *selected2_home = NULL; unsigned int count = 0; const char *type; int res; struct wpa_cred *cred, *selected_cred = NULL; struct wpa_cred *selected_home_cred = NULL; struct wpa_cred *selected2_cred = NULL; struct wpa_cred *selected2_home_cred = NULL; wpa_s->network_select = 0; wpa_printf(MSG_DEBUG, "Interworking: Select network (auto_select=%d)", wpa_s->auto_select); dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { int excluded = 0; int bh, bss_load, conn_capab; cred = interworking_credentials_available(wpa_s, bss, &excluded); if (!cred) continue; if (!wpa_bss_get_ie(bss, WLAN_EID_RSN)) { /* * We currently support only HS 2.0 networks and those * are required to use WPA2-Enterprise. */ wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Credential match with " MACSTR " but network does not use RSN", MAC2STR(bss->bssid)); continue; } if (!excluded) count++; res = interworking_home_sp(wpa_s, bss->anqp ? bss->anqp->domain_name : NULL); if (res > 0) type = "home"; else if (res == 0) type = "roaming"; else type = "unknown"; bh = cred_below_min_backhaul(wpa_s, cred, bss); bss_load = cred_over_max_bss_load(wpa_s, cred, bss); conn_capab = cred_conn_capab_missing(wpa_s, cred, bss); wpas_notify_interworking_ap_added(wpa_s, bss, cred, excluded, type, bh, bss_load, conn_capab); if (excluded) continue; if (wpa_s->auto_select || (wpa_s->conf->auto_interworking && wpa_s->auto_network_select)) { if (bh || bss_load || conn_capab) { if (selected2_cred == NULL || cred_prio_cmp(cred, selected2_cred) > 0) { wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2"); selected2 = bss; selected2_cred = cred; } if (res > 0 && (selected2_home_cred == NULL || cred_prio_cmp(cred, selected2_home_cred) > 0)) { wpa_printf(MSG_DEBUG, "Interworking: Mark as selected2_home"); selected2_home = bss; selected2_home_cred = cred; } } else { if (selected_cred == NULL || cred_prio_cmp(cred, selected_cred) > 0) { wpa_printf(MSG_DEBUG, "Interworking: Mark as selected"); selected = bss; selected_cred = cred; } if (res > 0 && (selected_home_cred == NULL || cred_prio_cmp(cred, selected_home_cred) > 0)) { wpa_printf(MSG_DEBUG, "Interworking: Mark as selected_home"); selected_home = bss; selected_home_cred = cred; } } } } if (selected_home && selected_home != selected && selected_home_cred && (selected_cred == NULL || cred_prio_cmp(selected_home_cred, selected_cred) >= 0)) { /* Prefer network operated by the Home SP */ wpa_printf(MSG_DEBUG, "Interworking: Overrode selected with selected_home"); selected = selected_home; selected_cred = selected_home_cred; } if (!selected) { if (selected2_home) { wpa_printf(MSG_DEBUG, "Interworking: Use home BSS with BW limit mismatch since no other network could be selected"); selected = selected2_home; selected_cred = selected2_home_cred; } else if (selected2) { wpa_printf(MSG_DEBUG, "Interworking: Use visited BSS with BW limit mismatch since no other network could be selected"); selected = selected2; selected_cred = selected2_cred; } } if (count == 0) { /* * No matching network was found based on configured * credentials. Check whether any of the enabled network blocks * have matching APs. */ if (interworking_find_network_match(wpa_s)) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Possible BSS match for enabled network configurations"); if (wpa_s->auto_select) { interworking_reconnect(wpa_s); return; } } if (wpa_s->auto_network_select) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Continue scanning after ANQP fetch"); wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 0); return; } wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network " "with matching credentials found"); if (wpa_s->wpa_state == WPA_SCANNING) wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); } wpas_notify_interworking_select_done(wpa_s); if (selected) { wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR, MAC2STR(selected->bssid)); selected = pick_best_roaming_partner(wpa_s, selected, selected_cred); wpa_printf(MSG_DEBUG, "Interworking: Selected " MACSTR " (after best roaming partner selection)", MAC2STR(selected->bssid)); wpa_msg(wpa_s, MSG_INFO, INTERWORKING_SELECTED MACSTR, MAC2STR(selected->bssid)); interworking_connect(wpa_s, selected, 0); } else if (wpa_s->wpa_state == WPA_SCANNING) wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED); } static struct wpa_bss_anqp * interworking_match_anqp_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss) { struct wpa_bss *other; if (is_zero_ether_addr(bss->hessid)) return NULL; /* Cannot be in the same homegenous ESS */ dl_list_for_each(other, &wpa_s->bss, struct wpa_bss, list) { if (other == bss) continue; if (other->anqp == NULL) continue; if (other->anqp->roaming_consortium == NULL && other->anqp->nai_realm == NULL && other->anqp->anqp_3gpp == NULL && other->anqp->domain_name == NULL) continue; if (!(other->flags & WPA_BSS_ANQP_FETCH_TRIED)) continue; if (!ether_addr_equal(bss->hessid, other->hessid)) continue; if (bss->ssid_len != other->ssid_len || os_memcmp(bss->ssid, other->ssid, bss->ssid_len) != 0) continue; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Share ANQP data with already fetched BSSID " MACSTR " and " MACSTR, MAC2STR(other->bssid), MAC2STR(bss->bssid)); other->anqp->users++; return other->anqp; } return NULL; } static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; int found = 0; wpa_printf(MSG_DEBUG, "Interworking: next_anqp_fetch - " "fetch_anqp_in_progress=%d fetch_osu_icon_in_progress=%d", wpa_s->fetch_anqp_in_progress, wpa_s->fetch_osu_icon_in_progress); if (eloop_terminated() || !wpa_s->fetch_anqp_in_progress) { wpa_printf(MSG_DEBUG, "Interworking: Stop next-ANQP-fetch"); return; } #ifdef CONFIG_HS20 if (wpa_s->fetch_osu_icon_in_progress) { wpa_printf(MSG_DEBUG, "Interworking: Next icon (in progress)"); hs20_next_osu_icon(wpa_s); return; } #endif /* CONFIG_HS20 */ dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { if (!(bss->caps & IEEE80211_CAP_ESS)) continue; if (!wpa_bss_ext_capab(bss, WLAN_EXT_CAPAB_INTERWORKING)) continue; /* AP does not support Interworking */ if (disallowed_bssid(wpa_s, bss->bssid) || disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) continue; /* Disallowed BSS */ if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) { if (bss->anqp == NULL) { bss->anqp = interworking_match_anqp_info(wpa_s, bss); if (bss->anqp) { /* Shared data already fetched */ continue; } bss->anqp = wpa_bss_anqp_alloc(); if (bss->anqp == NULL) break; } found++; bss->flags |= WPA_BSS_ANQP_FETCH_TRIED; wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for " MACSTR " (HESSID " MACSTR ")", MAC2STR(bss->bssid), MAC2STR(bss->hessid)); interworking_anqp_send_req(wpa_s, bss); break; } } if (found == 0) { #ifdef CONFIG_HS20 if (wpa_s->fetch_osu_info) { if (wpa_s->num_prov_found == 0 && wpa_s->fetch_osu_waiting_scan && wpa_s->num_osu_scans < 3) { wpa_printf(MSG_DEBUG, "HS 2.0: No OSU providers seen - try to scan again"); hs20_start_osu_scan(wpa_s); return; } wpa_printf(MSG_DEBUG, "Interworking: Next icon"); hs20_osu_icon_fetch(wpa_s); return; } #endif /* CONFIG_HS20 */ wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed"); wpa_s->fetch_anqp_in_progress = 0; if (wpa_s->network_select) interworking_select_network(wpa_s); } } void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s) { struct wpa_bss *bss; dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED; wpa_s->fetch_anqp_in_progress = 1; /* * Start actual ANQP operation from eloop call to make sure the loop * does not end up using excessive recursion. */ eloop_register_timeout(0, 0, interworking_continue_anqp, wpa_s, NULL); } int interworking_fetch_anqp(struct wpa_supplicant *wpa_s) { if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select) return 0; wpa_s->network_select = 0; wpa_s->fetch_all_anqp = 1; wpa_s->fetch_osu_info = 0; interworking_start_fetch_anqp(wpa_s); return 0; } void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s) { if (!wpa_s->fetch_anqp_in_progress) return; wpa_s->fetch_anqp_in_progress = 0; } int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, int freq, u16 info_ids[], size_t num_ids, u32 subtypes, u32 mbo_subtypes) { struct wpabuf *buf; struct wpabuf *extra_buf = NULL; int ret = 0; struct wpa_bss *bss; int res; bss = wpa_bss_get_bssid(wpa_s, dst); if (!bss && !freq) { wpa_printf(MSG_WARNING, "ANQP: Cannot send query without BSS freq info"); return -1; } if (bss) wpa_bss_anqp_unshare_alloc(bss); if (bss && !freq) freq = bss->freq; wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)", MAC2STR(dst), (unsigned int) num_ids); #ifdef CONFIG_HS20 if (subtypes != 0) { extra_buf = wpabuf_alloc(100); if (extra_buf == NULL) return -1; hs20_put_anqp_req(subtypes, NULL, 0, extra_buf); } #endif /* CONFIG_HS20 */ #ifdef CONFIG_MBO if (mbo_subtypes) { struct wpabuf *mbo; if (!bss) { wpa_printf(MSG_WARNING, "ANQP: Cannot send MBO query to unknown BSS " MACSTR, MAC2STR(dst)); wpabuf_free(extra_buf); return -1; } mbo = mbo_build_anqp_buf(wpa_s, bss, mbo_subtypes); if (mbo) { if (wpabuf_resize(&extra_buf, wpabuf_len(mbo))) { wpabuf_free(extra_buf); wpabuf_free(mbo); return -1; } wpabuf_put_buf(extra_buf, mbo); wpabuf_free(mbo); } } #endif /* CONFIG_MBO */ buf = anqp_build_req(info_ids, num_ids, extra_buf); wpabuf_free(extra_buf); if (buf == NULL) return -1; res = gas_query_req(wpa_s->gas, dst, freq, 0, 0, buf, anqp_resp_cb, wpa_s); if (res < 0) { wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Failed to send Query Request"); wpabuf_free(buf); ret = -1; } else { wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Query started with dialog token %u", res); } return ret; } static void anqp_add_extra(struct wpa_supplicant *wpa_s, struct wpa_bss_anqp *anqp, u16 info_id, const u8 *data, size_t slen, bool protected_response) { struct wpa_bss_anqp_elem *tmp, *elem = NULL; if (!anqp) return; dl_list_for_each(tmp, &anqp->anqp_elems, struct wpa_bss_anqp_elem, list) { if (tmp->infoid == info_id) { elem = tmp; break; } } if (!elem) { elem = os_zalloc(sizeof(*elem)); if (!elem) return; elem->infoid = info_id; dl_list_add(&anqp->anqp_elems, &elem->list); } else { wpabuf_free(elem->payload); } elem->protected_response = protected_response; elem->payload = wpabuf_alloc_copy(data, slen); if (!elem->payload) { dl_list_del(&elem->list); os_free(elem); } } static void interworking_parse_venue_url(struct wpa_supplicant *wpa_s, const u8 *data, size_t len) { const u8 *pos = data, *end = data + len; char url[255]; while (end - pos >= 2) { u8 slen, num; slen = *pos++; if (slen < 1 || slen > end - pos) { wpa_printf(MSG_DEBUG, "ANQP: Truncated Venue URL Duple field"); return; } num = *pos++; os_memcpy(url, pos, slen - 1); url[slen - 1] = '\0'; wpa_msg(wpa_s, MSG_INFO, RX_VENUE_URL "%u %s", num, url); pos += slen - 1; } } static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s, struct wpa_bss *bss, const u8 *sa, u16 info_id, const u8 *data, size_t slen, u8 dialog_token) { const u8 *pos = data; struct wpa_bss_anqp *anqp = NULL; u8 type; bool protected_response; if (bss) anqp = bss->anqp; switch (info_id) { case ANQP_CAPABILITY_LIST: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " ANQP Capability list", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Capability list", pos, slen); if (anqp) { wpabuf_free(anqp->capability_list); anqp->capability_list = wpabuf_alloc_copy(pos, slen); } break; case ANQP_VENUE_NAME: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Venue Name", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen); if (anqp) { wpabuf_free(anqp->venue_name); anqp->venue_name = wpabuf_alloc_copy(pos, slen); } break; case ANQP_NETWORK_AUTH_TYPE: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Network Authentication Type information", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication " "Type", pos, slen); if (anqp) { wpabuf_free(anqp->network_auth_type); anqp->network_auth_type = wpabuf_alloc_copy(pos, slen); } break; case ANQP_ROAMING_CONSORTIUM: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Roaming Consortium list", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium", pos, slen); if (anqp) { wpabuf_free(anqp->roaming_consortium); anqp->roaming_consortium = wpabuf_alloc_copy(pos, slen); } break; case ANQP_IP_ADDR_TYPE_AVAILABILITY: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " IP Address Type Availability information", MAC2STR(sa)); wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability", pos, slen); if (anqp) { wpabuf_free(anqp->ip_addr_type_availability); anqp->ip_addr_type_availability = wpabuf_alloc_copy(pos, slen); } break; case ANQP_NAI_REALM: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " NAI Realm list", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen); if (anqp) { wpabuf_free(anqp->nai_realm); anqp->nai_realm = wpabuf_alloc_copy(pos, slen); } break; case ANQP_3GPP_CELLULAR_NETWORK: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " 3GPP Cellular Network information", MAC2STR(sa)); wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network", pos, slen); if (anqp) { wpabuf_free(anqp->anqp_3gpp); anqp->anqp_3gpp = wpabuf_alloc_copy(pos, slen); } break; case ANQP_DOMAIN_NAME: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Domain Name list", MAC2STR(sa)); wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen); if (anqp) { wpabuf_free(anqp->domain_name); anqp->domain_name = wpabuf_alloc_copy(pos, slen); } break; #ifdef CONFIG_FILS case ANQP_FILS_REALM_INFO: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " FILS Realm Information", MAC2STR(sa)); wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: FILS Realm Information", pos, slen); if (anqp) { wpabuf_free(anqp->fils_realm_info); anqp->fils_realm_info = wpabuf_alloc_copy(pos, slen); } break; #endif /* CONFIG_FILS */ case ANQP_VENUE_URL: wpa_msg(wpa_s, MSG_INFO, RX_ANQP MACSTR " Venue URL", MAC2STR(sa)); protected_response = pmf_in_use(wpa_s, sa); anqp_add_extra(wpa_s, anqp, info_id, pos, slen, protected_response); if (!protected_response) { wpa_printf(MSG_DEBUG, "ANQP: Ignore Venue URL since PMF was not enabled"); break; } interworking_parse_venue_url(wpa_s, pos, slen); break; case ANQP_VENDOR_SPECIFIC: if (slen < 3) return; switch (WPA_GET_BE24(pos)) { case OUI_WFA: pos += 3; slen -= 3; if (slen < 1) return; type = *pos++; slen--; switch (type) { #ifdef CONFIG_HS20 case HS20_ANQP_OUI_TYPE: hs20_parse_rx_hs20_anqp_resp(wpa_s, bss, sa, pos, slen, dialog_token); break; #endif /* CONFIG_HS20 */ #ifdef CONFIG_MBO case MBO_ANQP_OUI_TYPE: mbo_parse_rx_anqp_resp(wpa_s, bss, sa, pos, slen); break; #endif /* CONFIG_MBO */ default: wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Unsupported ANQP vendor type %u", type); break; } break; default: wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Unsupported vendor-specific ANQP OUI %06x", WPA_GET_BE24(pos)); return; } break; default: wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Unsupported ANQP Info ID %u", info_id); anqp_add_extra(wpa_s, anqp, info_id, data, slen, pmf_in_use(wpa_s, sa)); break; } } void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token, enum gas_query_result result, const struct wpabuf *adv_proto, const struct wpabuf *resp, u16 status_code) { struct wpa_supplicant *wpa_s = ctx; const u8 *pos; const u8 *end; u16 info_id; u16 slen; struct wpa_bss *bss = NULL, *tmp; const char *anqp_result = "SUCCESS"; wpa_printf(MSG_DEBUG, "Interworking: anqp_resp_cb dst=" MACSTR " dialog_token=%u result=%d status_code=%u", MAC2STR(dst), dialog_token, result, status_code); if (result != GAS_QUERY_SUCCESS) { #ifdef CONFIG_HS20 if (wpa_s->fetch_osu_icon_in_progress) hs20_icon_fetch_failed(wpa_s); #endif /* CONFIG_HS20 */ anqp_result = "FAILURE"; goto out; } pos = wpabuf_head(adv_proto); if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO || pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) { wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Unexpected Advertisement Protocol in response"); #ifdef CONFIG_HS20 if (wpa_s->fetch_osu_icon_in_progress) hs20_icon_fetch_failed(wpa_s); #endif /* CONFIG_HS20 */ anqp_result = "INVALID_FRAME"; goto out; } /* * If possible, select the BSS entry based on which BSS entry was used * for the request. This can help in cases where multiple BSS entries * may exist for the same AP. */ dl_list_for_each_reverse(tmp, &wpa_s->bss, struct wpa_bss, list) { if (tmp == wpa_s->interworking_gas_bss && ether_addr_equal(tmp->bssid, dst)) { bss = tmp; break; } } if (bss == NULL) bss = wpa_bss_get_bssid(wpa_s, dst); pos = wpabuf_head(resp); end = pos + wpabuf_len(resp); while (pos < end) { unsigned int left = end - pos; if (left < 4) { wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element"); anqp_result = "INVALID_FRAME"; goto out_parse_done; } info_id = WPA_GET_LE16(pos); pos += 2; slen = WPA_GET_LE16(pos); pos += 2; left -= 4; if (left < slen) { wpa_msg(wpa_s, MSG_DEBUG, "ANQP: Invalid element length for Info ID %u", info_id); anqp_result = "INVALID_FRAME"; goto out_parse_done; } interworking_parse_rx_anqp_resp(wpa_s, bss, dst, info_id, pos, slen, dialog_token); pos += slen; } out_parse_done: #ifdef CONFIG_HS20 hs20_notify_parse_done(wpa_s); #endif /* CONFIG_HS20 */ out: wpa_msg(wpa_s, MSG_INFO, ANQP_QUERY_DONE "addr=" MACSTR " result=%s", MAC2STR(dst), anqp_result); } static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res) { wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Scan results available - start ANQP fetch"); interworking_start_fetch_anqp(wpa_s); } int interworking_select(struct wpa_supplicant *wpa_s, int auto_select, int *freqs) { interworking_stop_fetch_anqp(wpa_s); wpa_s->network_select = 1; wpa_s->auto_network_select = 0; wpa_s->auto_select = !!auto_select; wpa_s->fetch_all_anqp = 0; wpa_s->fetch_osu_info = 0; wpa_msg(wpa_s, MSG_DEBUG, "Interworking: Start scan for network selection"); wpa_s->scan_res_handler = interworking_scan_res_handler; wpa_s->normal_scans = 0; wpa_s->scan_req = MANUAL_SCAN_REQ; os_free(wpa_s->manual_scan_freqs); wpa_s->manual_scan_freqs = freqs; wpa_s->after_wps = 0; wpa_s->known_wps_freq = 0; wpa_supplicant_req_scan(wpa_s, 0, 0); return 0; } static void gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token, enum gas_query_result result, const struct wpabuf *adv_proto, const struct wpabuf *resp, u16 status_code) { struct wpa_supplicant *wpa_s = ctx; struct wpabuf *n; wpa_msg(wpa_s, MSG_INFO, GAS_RESPONSE_INFO "addr=" MACSTR " dialog_token=%d status_code=%d resp_len=%d", MAC2STR(addr), dialog_token, status_code, resp ? (int) wpabuf_len(resp) : -1); if (!resp) return; n = wpabuf_dup(resp); if (n == NULL) return; wpabuf_free(wpa_s->prev_gas_resp); wpa_s->prev_gas_resp = wpa_s->last_gas_resp; os_memcpy(wpa_s->prev_gas_addr, wpa_s->last_gas_addr, ETH_ALEN); wpa_s->prev_gas_dialog_token = wpa_s->last_gas_dialog_token; wpa_s->last_gas_resp = n; os_memcpy(wpa_s->last_gas_addr, addr, ETH_ALEN); wpa_s->last_gas_dialog_token = dialog_token; } int gas_send_request(struct wpa_supplicant *wpa_s, const u8 *dst, const struct wpabuf *adv_proto, const struct wpabuf *query) { struct wpabuf *buf; int ret = 0; int freq; struct wpa_bss *bss; int res; size_t len; u8 query_resp_len_limit = 0; freq = wpa_s->assoc_freq; bss = wpa_bss_get_bssid(wpa_s, dst); if (bss) freq = bss->freq; if (freq <= 0) return -1; wpa_msg(wpa_s, MSG_DEBUG, "GAS request to " MACSTR " (freq %d MHz)", MAC2STR(dst), freq); wpa_hexdump_buf(MSG_DEBUG, "Advertisement Protocol ID", adv_proto); wpa_hexdump_buf(MSG_DEBUG, "GAS Query", query); len = 3 + wpabuf_len(adv_proto) + 2; if (query) len += wpabuf_len(query); buf = gas_build_initial_req(0, len); if (buf == NULL) return -1; /* Advertisement Protocol IE */ wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO); wpabuf_put_u8(buf, 1 + wpabuf_len(adv_proto)); /* Length */ wpabuf_put_u8(buf, query_resp_len_limit & 0x7f); wpabuf_put_buf(buf, adv_proto); /* GAS Query */ if (query) { wpabuf_put_le16(buf, wpabuf_len(query)); wpabuf_put_buf(buf, query); } else wpabuf_put_le16(buf, 0); res = gas_query_req(wpa_s->gas, dst, freq, 0, 0, buf, gas_resp_cb, wpa_s); if (res < 0) { wpa_msg(wpa_s, MSG_DEBUG, "GAS: Failed to send Query Request"); wpabuf_free(buf); ret = -1; } else wpa_msg(wpa_s, MSG_DEBUG, "GAS: Query started with dialog token %u", res); return ret; }