/* * RADIUS authentication server * Copyright (c) 2005-2009, 2011-2019, Jouni Malinen * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "includes.h" #include #ifdef CONFIG_SQLITE #include #endif /* CONFIG_SQLITE */ #include "common.h" #include "radius.h" #include "eloop.h" #include "eap_server/eap.h" #include "ap/ap_config.h" #include "crypto/tls.h" #include "radius_server.h" /** * RADIUS_SESSION_TIMEOUT - Session timeout in seconds */ #define RADIUS_SESSION_TIMEOUT 60 /** * RADIUS_SESSION_MAINTAIN - Completed session expiration timeout in seconds */ #define RADIUS_SESSION_MAINTAIN 5 /** * RADIUS_MAX_SESSION - Maximum number of active sessions */ #define RADIUS_MAX_SESSION 1000 static const struct eapol_callbacks radius_server_eapol_cb; struct radius_client; struct radius_server_data; /** * struct radius_server_counters - RADIUS server statistics counters */ struct radius_server_counters { u32 access_requests; u32 invalid_requests; u32 dup_access_requests; u32 access_accepts; u32 access_rejects; u32 access_challenges; u32 malformed_access_requests; u32 bad_authenticators; u32 packets_dropped; u32 unknown_types; u32 acct_requests; u32 invalid_acct_requests; u32 acct_responses; u32 malformed_acct_requests; u32 acct_bad_authenticators; u32 unknown_acct_types; }; /** * struct radius_session - Internal RADIUS server data for a session */ struct radius_session { struct radius_session *next; struct radius_client *client; struct radius_server_data *server; unsigned int sess_id; struct eap_sm *eap; struct eap_eapol_interface *eap_if; char *username; /* from User-Name attribute */ char *nas_ip; u8 mac_addr[ETH_ALEN]; /* from Calling-Station-Id attribute */ struct radius_msg *last_msg; char *last_from_addr; int last_from_port; struct sockaddr_storage last_from; socklen_t last_fromlen; u8 last_identifier; struct radius_msg *last_reply; u8 last_authenticator[16]; unsigned int remediation:1; unsigned int macacl:1; unsigned int t_c_filtering:1; struct hostapd_radius_attr *accept_attr; u32 t_c_timestamp; /* Last read T&C timestamp from user DB */ }; /** * struct radius_client - Internal RADIUS server data for a client */ struct radius_client { struct radius_client *next; struct in_addr addr; struct in_addr mask; #ifdef CONFIG_IPV6 struct in6_addr addr6; struct in6_addr mask6; #endif /* CONFIG_IPV6 */ char *shared_secret; int shared_secret_len; struct radius_session *sessions; struct radius_server_counters counters; u8 next_dac_identifier; struct radius_msg *pending_dac_coa_req; u8 pending_dac_coa_id; u8 pending_dac_coa_addr[ETH_ALEN]; struct radius_msg *pending_dac_disconnect_req; u8 pending_dac_disconnect_id; u8 pending_dac_disconnect_addr[ETH_ALEN]; }; /** * struct radius_server_data - Internal RADIUS server data */ struct radius_server_data { /** * auth_sock - Socket for RADIUS authentication messages */ int auth_sock; /** * acct_sock - Socket for RADIUS accounting messages */ int acct_sock; /** * clients - List of authorized RADIUS clients */ struct radius_client *clients; /** * next_sess_id - Next session identifier */ unsigned int next_sess_id; /** * conf_ctx - Context pointer for callbacks * * This is used as the ctx argument in get_eap_user() calls. */ void *conf_ctx; /** * num_sess - Number of active sessions */ int num_sess; const char *erp_domain; struct dl_list erp_keys; /* struct eap_server_erp_key */ /** * ipv6 - Whether to enable IPv6 support in the RADIUS server */ int ipv6; /** * start_time - Timestamp of server start */ struct os_reltime start_time; /** * counters - Statistics counters for server operations * * These counters are the sum over all clients. */ struct radius_server_counters counters; /** * get_eap_user - Callback for fetching EAP user information * @ctx: Context data from conf_ctx * @identity: User identity * @identity_len: identity buffer length in octets * @phase2: Whether this is for Phase 2 identity * @user: Data structure for filling in the user information * Returns: 0 on success, -1 on failure * * This is used to fetch information from user database. The callback * will fill in information about allowed EAP methods and the user * password. The password field will be an allocated copy of the * password data and RADIUS server will free it after use. */ int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len, int phase2, struct eap_user *user); /** * eap_req_id_text - Optional data for EAP-Request/Identity * * This can be used to configure an optional, displayable message that * will be sent in EAP-Request/Identity. This string can contain an * ASCII-0 character (nul) to separate network infromation per RFC * 4284. The actual string length is explicit provided in * eap_req_id_text_len since nul character will not be used as a string * terminator. */ char *eap_req_id_text; /** * eap_req_id_text_len - Length of eap_req_id_text buffer in octets */ size_t eap_req_id_text_len; #ifdef CONFIG_RADIUS_TEST char *dump_msk_file; #endif /* CONFIG_RADIUS_TEST */ char *subscr_remediation_url; u8 subscr_remediation_method; char *hs20_sim_provisioning_url; char *t_c_server_url; #ifdef CONFIG_SQLITE sqlite3 *db; #endif /* CONFIG_SQLITE */ const struct eap_config *eap_cfg; }; #define RADIUS_DEBUG(args...) \ wpa_printf(MSG_DEBUG, "RADIUS SRV: " args) #define RADIUS_ERROR(args...) \ wpa_printf(MSG_ERROR, "RADIUS SRV: " args) #define RADIUS_DUMP(args...) \ wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args) #define RADIUS_DUMP_ASCII(args...) \ wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args) static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx); static void radius_server_session_remove_timeout(void *eloop_ctx, void *timeout_ctx); #ifdef CONFIG_SQLITE #ifdef CONFIG_HS20 static int db_table_exists(sqlite3 *db, const char *name) { char cmd[128]; os_snprintf(cmd, sizeof(cmd), "SELECT 1 FROM %s;", name); return sqlite3_exec(db, cmd, NULL, NULL, NULL) == SQLITE_OK; } static int db_table_create_sim_provisioning(sqlite3 *db) { char *err = NULL; const char *sql = "CREATE TABLE sim_provisioning(" " mobile_identifier_hash TEXT PRIMARY KEY," " imsi TEXT," " mac_addr TEXT," " eap_method TEXT," " timestamp TEXT" ");"; RADIUS_DEBUG("Adding database table for SIM provisioning information"); if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) { RADIUS_ERROR("SQLite error: %s", err); sqlite3_free(err); return -1; } return 0; } #endif /* CONFIG_HS20 */ #endif /* CONFIG_SQLITE */ void srv_log(struct radius_session *sess, const char *fmt, ...) PRINTF_FORMAT(2, 3); void srv_log(struct radius_session *sess, const char *fmt, ...) { va_list ap; char *buf; int buflen; va_start(ap, fmt); buflen = vsnprintf(NULL, 0, fmt, ap) + 1; va_end(ap); buf = os_malloc(buflen); if (buf == NULL) return; va_start(ap, fmt); vsnprintf(buf, buflen, fmt, ap); va_end(ap); RADIUS_DEBUG("[0x%x %s] %s", sess->sess_id, sess->nas_ip, buf); #ifdef CONFIG_SQLITE if (sess->server->db) { char *sql; sql = sqlite3_mprintf("INSERT INTO authlog" "(timestamp,session,nas_ip,username,note)" " VALUES (" "strftime('%%Y-%%m-%%d %%H:%%M:%%f'," "'now'),%u,%Q,%Q,%Q)", sess->sess_id, sess->nas_ip, sess->username, buf); if (sql) { if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != SQLITE_OK) { RADIUS_ERROR("Failed to add authlog entry into sqlite database: %s", sqlite3_errmsg(sess->server->db)); } sqlite3_free(sql); } } #endif /* CONFIG_SQLITE */ os_free(buf); } static struct radius_client * radius_server_get_client(struct radius_server_data *data, struct in_addr *addr, int ipv6) { struct radius_client *client = data->clients; while (client) { #ifdef CONFIG_IPV6 if (ipv6) { struct in6_addr *addr6; int i; addr6 = (struct in6_addr *) addr; for (i = 0; i < 16; i++) { if ((addr6->s6_addr[i] & client->mask6.s6_addr[i]) != (client->addr6.s6_addr[i] & client->mask6.s6_addr[i])) { i = 17; break; } } if (i == 16) { break; } } #endif /* CONFIG_IPV6 */ if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) == (addr->s_addr & client->mask.s_addr)) { break; } client = client->next; } return client; } static struct radius_session * radius_server_get_session(struct radius_client *client, unsigned int sess_id) { struct radius_session *sess = client->sessions; while (sess) { if (sess->sess_id == sess_id) { break; } sess = sess->next; } return sess; } static void radius_server_session_free(struct radius_server_data *data, struct radius_session *sess) { eloop_cancel_timeout(radius_server_session_timeout, data, sess); eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); eap_server_sm_deinit(sess->eap); radius_msg_free(sess->last_msg); os_free(sess->last_from_addr); radius_msg_free(sess->last_reply); os_free(sess->username); os_free(sess->nas_ip); os_free(sess); data->num_sess--; } static void radius_server_session_remove(struct radius_server_data *data, struct radius_session *sess) { struct radius_client *client = sess->client; struct radius_session *session, *prev; eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); prev = NULL; session = client->sessions; while (session) { if (session == sess) { if (prev == NULL) { client->sessions = sess->next; } else { prev->next = sess->next; } radius_server_session_free(data, sess); break; } prev = session; session = session->next; } } static void radius_server_session_remove_timeout(void *eloop_ctx, void *timeout_ctx) { struct radius_server_data *data = eloop_ctx; struct radius_session *sess = timeout_ctx; RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id); radius_server_session_remove(data, sess); } static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx) { struct radius_server_data *data = eloop_ctx; struct radius_session *sess = timeout_ctx; RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id); radius_server_session_remove(data, sess); } static struct radius_session * radius_server_new_session(struct radius_server_data *data, struct radius_client *client) { struct radius_session *sess; if (data->num_sess >= RADIUS_MAX_SESSION) { RADIUS_DEBUG("Maximum number of existing session - no room " "for a new session"); return NULL; } sess = os_zalloc(sizeof(*sess)); if (sess == NULL) return NULL; sess->server = data; sess->client = client; sess->sess_id = data->next_sess_id++; sess->next = client->sessions; client->sessions = sess; eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0, radius_server_session_timeout, data, sess); data->num_sess++; return sess; } #ifdef CONFIG_TESTING_OPTIONS static void radius_server_testing_options_tls(struct radius_session *sess, const char *tls, struct eap_session_data *eap_conf) { int test = atoi(tls); switch (test) { case 1: srv_log(sess, "TLS test - break VerifyData"); eap_conf->tls_test_flags = TLS_BREAK_VERIFY_DATA; break; case 2: srv_log(sess, "TLS test - break ServerKeyExchange ServerParams hash"); eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_HASH; break; case 3: srv_log(sess, "TLS test - break ServerKeyExchange ServerParams Signature"); eap_conf->tls_test_flags = TLS_BREAK_SRV_KEY_X_SIGNATURE; break; case 4: srv_log(sess, "TLS test - RSA-DHE using a short 511-bit prime"); eap_conf->tls_test_flags = TLS_DHE_PRIME_511B; break; case 5: srv_log(sess, "TLS test - RSA-DHE using a short 767-bit prime"); eap_conf->tls_test_flags = TLS_DHE_PRIME_767B; break; case 6: srv_log(sess, "TLS test - RSA-DHE using a bogus 15 \"prime\""); eap_conf->tls_test_flags = TLS_DHE_PRIME_15; break; case 7: srv_log(sess, "TLS test - RSA-DHE using a short 58-bit prime in long container"); eap_conf->tls_test_flags = TLS_DHE_PRIME_58B; break; case 8: srv_log(sess, "TLS test - RSA-DHE using a non-prime"); eap_conf->tls_test_flags = TLS_DHE_NON_PRIME; break; default: srv_log(sess, "Unrecognized TLS test"); break; } } #endif /* CONFIG_TESTING_OPTIONS */ static void radius_server_testing_options(struct radius_session *sess, struct eap_session_data *eap_conf) { #ifdef CONFIG_TESTING_OPTIONS const char *pos; pos = os_strstr(sess->username, "@test-"); if (pos == NULL) return; pos += 6; if (os_strncmp(pos, "tls-", 4) == 0) radius_server_testing_options_tls(sess, pos + 4, eap_conf); else srv_log(sess, "Unrecognized test: %s", pos); #endif /* CONFIG_TESTING_OPTIONS */ } #ifdef CONFIG_ERP static struct eap_server_erp_key * radius_server_erp_find_key(struct radius_server_data *data, const char *keyname) { struct eap_server_erp_key *erp; dl_list_for_each(erp, &data->erp_keys, struct eap_server_erp_key, list) { if (os_strcmp(erp->keyname_nai, keyname) == 0) return erp; } return NULL; } #endif /* CONFIG_ERP */ static struct radius_session * radius_server_get_new_session(struct radius_server_data *data, struct radius_client *client, struct radius_msg *msg, const char *from_addr) { u8 *user, *id; size_t user_len, id_len; int res; struct radius_session *sess; struct eap_session_data eap_sess; struct eap_user *tmp; RADIUS_DEBUG("Creating a new session"); if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, &user, &user_len, NULL) < 0) { RADIUS_DEBUG("Could not get User-Name"); return NULL; } RADIUS_DUMP_ASCII("User-Name", user, user_len); tmp = os_zalloc(sizeof(*tmp)); if (!tmp) return NULL; res = data->get_eap_user(data->conf_ctx, user, user_len, 0, tmp); #ifdef CONFIG_ERP if (res != 0 && data->eap_cfg->erp) { char *username; username = os_zalloc(user_len + 1); if (username) { os_memcpy(username, user, user_len); if (radius_server_erp_find_key(data, username)) res = 0; os_free(username); } } #endif /* CONFIG_ERP */ if (res != 0) { RADIUS_DEBUG("User-Name not found from user database"); eap_user_free(tmp); return NULL; } RADIUS_DEBUG("Matching user entry found"); sess = radius_server_new_session(data, client); if (sess == NULL) { RADIUS_DEBUG("Failed to create a new session"); eap_user_free(tmp); return NULL; } sess->accept_attr = tmp->accept_attr; sess->macacl = tmp->macacl; eap_user_free(tmp); sess->username = os_malloc(user_len * 4 + 1); if (sess->username == NULL) { radius_server_session_remove(data, sess); return NULL; } printf_encode(sess->username, user_len * 4 + 1, user, user_len); sess->nas_ip = os_strdup(from_addr); if (sess->nas_ip == NULL) { radius_server_session_remove(data, sess); return NULL; } if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_CALLING_STATION_ID, &id, &id_len, NULL) == 0) { char buf[3 * ETH_ALEN]; os_memset(buf, 0, sizeof(buf)); if (id_len >= sizeof(buf)) id_len = sizeof(buf) - 1; os_memcpy(buf, id, id_len); if (hwaddr_aton2(buf, sess->mac_addr) < 0) os_memset(sess->mac_addr, 0, ETH_ALEN); else RADIUS_DEBUG("Calling-Station-Id: " MACSTR, MAC2STR(sess->mac_addr)); } srv_log(sess, "New session created"); os_memset(&eap_sess, 0, sizeof(eap_sess)); radius_server_testing_options(sess, &eap_sess); sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb, data->eap_cfg, &eap_sess); if (sess->eap == NULL) { RADIUS_DEBUG("Failed to initialize EAP state machine for the " "new session"); radius_server_session_remove(data, sess); return NULL; } sess->eap_if = eap_get_interface(sess->eap); sess->eap_if->eapRestart = true; sess->eap_if->portEnabled = true; RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id); return sess; } #ifdef CONFIG_HS20 static void radius_srv_hs20_t_c_pending(struct radius_session *sess) { #ifdef CONFIG_SQLITE char *sql; char addr[3 * ETH_ALEN], *id_str; const u8 *id; size_t id_len; if (!sess->server->db || !sess->eap || is_zero_ether_addr(sess->mac_addr)) return; os_snprintf(addr, sizeof(addr), MACSTR, MAC2STR(sess->mac_addr)); id = eap_get_identity(sess->eap, &id_len); if (!id) return; id_str = os_malloc(id_len + 1); if (!id_str) return; os_memcpy(id_str, id, id_len); id_str[id_len] = '\0'; sql = sqlite3_mprintf("INSERT OR REPLACE INTO pending_tc (mac_addr,identity) VALUES (%Q,%Q)", addr, id_str); os_free(id_str); if (!sql) return; if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != SQLITE_OK) { RADIUS_ERROR("Failed to add pending_tc entry into sqlite database: %s", sqlite3_errmsg(sess->server->db)); } sqlite3_free(sql); #endif /* CONFIG_SQLITE */ } #endif /* CONFIG_HS20 */ static void radius_server_add_session(struct radius_session *sess) { #ifdef CONFIG_SQLITE char *sql; char addr_txt[ETH_ALEN * 3]; struct os_time now; if (!sess->server->db) return; os_snprintf(addr_txt, sizeof(addr_txt), MACSTR, MAC2STR(sess->mac_addr)); os_get_time(&now); sql = sqlite3_mprintf("INSERT OR REPLACE INTO current_sessions(mac_addr,identity,start_time,nas,hs20_t_c_filtering) VALUES (%Q,%Q,%d,%Q,%u)", addr_txt, sess->username, now.sec, sess->nas_ip, sess->t_c_filtering); if (sql) { if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != SQLITE_OK) { RADIUS_ERROR("Failed to add current_sessions entry into sqlite database: %s", sqlite3_errmsg(sess->server->db)); } sqlite3_free(sql); } #endif /* CONFIG_SQLITE */ } static void db_update_last_msk(struct radius_session *sess, const char *msk) { #ifdef CONFIG_RADIUS_TEST #ifdef CONFIG_SQLITE char *sql = NULL; char *id_str = NULL; const u8 *id; size_t id_len; const char *serial_num; if (!sess->server->db) return; serial_num = eap_get_serial_num(sess->eap); if (serial_num) { id_len = 5 + os_strlen(serial_num) + 1; id_str = os_malloc(id_len); if (!id_str) return; os_snprintf(id_str, id_len, "cert-%s", serial_num); } else { id = eap_get_identity(sess->eap, &id_len); if (!id) return; id_str = os_malloc(id_len + 1); if (!id_str) return; os_memcpy(id_str, id, id_len); id_str[id_len] = '\0'; } sql = sqlite3_mprintf("UPDATE users SET last_msk=%Q WHERE identity=%Q", msk, id_str); os_free(id_str); if (!sql) return; if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != SQLITE_OK) { RADIUS_DEBUG("Failed to update last_msk: %s", sqlite3_errmsg(sess->server->db)); } sqlite3_free(sql); #endif /* CONFIG_SQLITE */ #endif /* CONFIG_RADIUS_TEST */ } #ifdef CONFIG_HS20 static int radius_server_is_sim_method(struct radius_session *sess) { const char *name; name = eap_get_method(sess->eap); return name && (os_strcmp(name, "SIM") == 0 || os_strcmp(name, "AKA") == 0 || os_strcmp(name, "AKA'") == 0); } static int radius_server_hs20_missing_sim_pps(struct radius_msg *request) { u8 *buf, *pos, *end, type, sublen; size_t len; buf = NULL; for (;;) { if (radius_msg_get_attr_ptr(request, RADIUS_ATTR_VENDOR_SPECIFIC, &buf, &len, buf) < 0) return 0; if (len < 6) continue; pos = buf; end = buf + len; if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) continue; pos += 4; type = *pos++; sublen = *pos++; if (sublen < 2) continue; /* invalid length */ sublen -= 2; /* skip header */ if (pos + sublen > end) continue; /* invalid WFA VSA */ if (type != RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION) continue; RADIUS_DUMP("HS2.0 mobile device version", pos, sublen); if (sublen < 1 + 2) continue; if (pos[0] == 0) continue; /* Release 1 STA does not support provisioning */ /* UpdateIdentifier 0 indicates no PPS MO */ return WPA_GET_BE16(pos + 1) == 0; } } #define HS20_MOBILE_ID_HASH_LEN 16 static int radius_server_sim_provisioning_session(struct radius_session *sess, const u8 *hash) { #ifdef CONFIG_SQLITE char *sql; char addr_txt[ETH_ALEN * 3]; char hash_txt[2 * HS20_MOBILE_ID_HASH_LEN + 1]; struct os_time now; int res; const char *imsi, *eap_method; if (!sess->server->db || (!db_table_exists(sess->server->db, "sim_provisioning") && db_table_create_sim_provisioning(sess->server->db) < 0)) return -1; imsi = eap_get_imsi(sess->eap); if (!imsi) return -1; eap_method = eap_get_method(sess->eap); if (!eap_method) return -1; os_snprintf(addr_txt, sizeof(addr_txt), MACSTR, MAC2STR(sess->mac_addr)); wpa_snprintf_hex(hash_txt, sizeof(hash_txt), hash, HS20_MOBILE_ID_HASH_LEN); os_get_time(&now); sql = sqlite3_mprintf("INSERT INTO sim_provisioning(mobile_identifier_hash,imsi,mac_addr,eap_method,timestamp) VALUES (%Q,%Q,%Q,%Q,%u)", hash_txt, imsi, addr_txt, eap_method, now.sec); if (!sql) return -1; if (sqlite3_exec(sess->server->db, sql, NULL, NULL, NULL) != SQLITE_OK) { RADIUS_ERROR("Failed to add SIM provisioning entry into sqlite database: %s", sqlite3_errmsg(sess->server->db)); res = -1; } else { res = 0; } sqlite3_free(sql); return res; #endif /* CONFIG_SQLITE */ return -1; } #endif /* CONFIG_HS20 */ static struct radius_msg * radius_server_encapsulate_eap(struct radius_server_data *data, struct radius_client *client, struct radius_session *sess, struct radius_msg *request) { struct radius_msg *msg; int code; unsigned int sess_id; struct radius_hdr *hdr = radius_msg_get_hdr(request); u16 reason = WLAN_REASON_IEEE_802_1X_AUTH_FAILED; if (sess->eap_if->eapFail) { sess->eap_if->eapFail = false; code = RADIUS_CODE_ACCESS_REJECT; } else if (sess->eap_if->eapSuccess) { sess->eap_if->eapSuccess = false; code = RADIUS_CODE_ACCESS_ACCEPT; } else { sess->eap_if->eapReq = false; code = RADIUS_CODE_ACCESS_CHALLENGE; } msg = radius_msg_new(code, hdr->identifier); if (msg == NULL) { RADIUS_DEBUG("Failed to allocate reply message"); return NULL; } sess_id = htonl(sess->sess_id); if (code == RADIUS_CODE_ACCESS_CHALLENGE && !radius_msg_add_attr(msg, RADIUS_ATTR_STATE, (u8 *) &sess_id, sizeof(sess_id))) { RADIUS_DEBUG("Failed to add State attribute"); } if (sess->eap_if->eapReqData && !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData), wpabuf_len(sess->eap_if->eapReqData))) { RADIUS_DEBUG("Failed to add EAP-Message attribute"); } if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) { int len; #ifdef CONFIG_RADIUS_TEST char buf[2 * 64 + 1]; len = sess->eap_if->eapKeyDataLen; if (len > 64) len = 64; len = wpa_snprintf_hex(buf, sizeof(buf), sess->eap_if->eapKeyData, len); buf[len] = '\0'; if (data->dump_msk_file) { FILE *f; f = fopen(data->dump_msk_file, "a"); if (f) { len = sess->eap_if->eapKeyDataLen; if (len > 64) len = 64; len = wpa_snprintf_hex( buf, sizeof(buf), sess->eap_if->eapKeyData, len); buf[len] = '\0'; fprintf(f, "%s\n", buf); fclose(f); } } db_update_last_msk(sess, buf); #endif /* CONFIG_RADIUS_TEST */ if (sess->eap_if->eapKeyDataLen > 64) { len = 32; } else { len = sess->eap_if->eapKeyDataLen / 2; } if (!radius_msg_add_mppe_keys(msg, hdr->authenticator, (u8 *) client->shared_secret, client->shared_secret_len, sess->eap_if->eapKeyData + len, len, sess->eap_if->eapKeyData, len)) { RADIUS_DEBUG("Failed to add MPPE key attributes"); } if (sess->eap_if->eapSessionId && !radius_msg_add_attr(msg, RADIUS_ATTR_EAP_KEY_NAME, sess->eap_if->eapSessionId, sess->eap_if->eapSessionIdLen)) { RADIUS_DEBUG("Failed to add EAP-Key-Name attribute"); } } #ifdef CONFIG_HS20 if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation && data->subscr_remediation_url) { u8 *buf; size_t url_len = os_strlen(data->subscr_remediation_url); buf = os_malloc(1 + url_len); if (buf == NULL) { radius_msg_free(msg); return NULL; } buf[0] = data->subscr_remediation_method; os_memcpy(&buf[1], data->subscr_remediation_url, url_len); if (!radius_msg_add_wfa( msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION, buf, 1 + url_len)) { RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem"); } os_free(buf); } else if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->remediation) { u8 buf[1]; if (!radius_msg_add_wfa( msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION, buf, 0)) { RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem"); } } else if (code == RADIUS_CODE_ACCESS_ACCEPT && data->hs20_sim_provisioning_url && radius_server_is_sim_method(sess) && radius_server_hs20_missing_sim_pps(request)) { u8 *buf, *pos, hash[HS20_MOBILE_ID_HASH_LEN]; size_t prefix_len, url_len; RADIUS_DEBUG("Device needs HS 2.0 SIM provisioning"); if (os_get_random(hash, HS20_MOBILE_ID_HASH_LEN) < 0) { radius_msg_free(msg); return NULL; } RADIUS_DUMP("hotspot2dot0-mobile-identifier-hash", hash, HS20_MOBILE_ID_HASH_LEN); if (radius_server_sim_provisioning_session(sess, hash) < 0) { radius_msg_free(msg); return NULL; } prefix_len = os_strlen(data->hs20_sim_provisioning_url); url_len = prefix_len + 2 * HS20_MOBILE_ID_HASH_LEN; buf = os_malloc(1 + url_len + 1); if (!buf) { radius_msg_free(msg); return NULL; } pos = buf; *pos++ = data->subscr_remediation_method; os_memcpy(pos, data->hs20_sim_provisioning_url, prefix_len); pos += prefix_len; wpa_snprintf_hex((char *) pos, 2 * HS20_MOBILE_ID_HASH_LEN + 1, hash, HS20_MOBILE_ID_HASH_LEN); RADIUS_DEBUG("HS 2.0 subscription remediation URL: %s", (char *) &buf[1]); if (!radius_msg_add_wfa( msg, RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION, buf, 1 + url_len)) { RADIUS_DEBUG("Failed to add WFA-HS20-SubscrRem"); } os_free(buf); } if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->t_c_filtering) { u8 buf[4] = { 0x01, 0x00, 0x00, 0x00 }; /* E=1 */ const char *url = data->t_c_server_url, *pos; char *url2, *end2, *pos2; size_t url_len; if (!radius_msg_add_wfa( msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING, buf, sizeof(buf))) { RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering"); radius_msg_free(msg); return NULL; } if (!url) { RADIUS_DEBUG("No t_c_server_url configured"); radius_msg_free(msg); return NULL; } pos = os_strstr(url, "@1@"); if (!pos) { RADIUS_DEBUG("No @1@ macro in t_c_server_url"); radius_msg_free(msg); return NULL; } url_len = os_strlen(url) + ETH_ALEN * 3 - 1 - 3; url2 = os_malloc(url_len + 1); if (!url2) { RADIUS_DEBUG("Failed to allocate room for T&C Server URL"); os_free(url2); radius_msg_free(msg); return NULL; } pos2 = url2; end2 = url2 + url_len + 1; os_memcpy(pos2, url, pos - url); pos2 += pos - url; os_snprintf(pos2, end2 - pos2, MACSTR, MAC2STR(sess->mac_addr)); pos2 += ETH_ALEN * 3 - 1; os_memcpy(pos2, pos + 3, os_strlen(pos + 3)); if (!radius_msg_add_wfa(msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_URL, (const u8 *) url2, url_len)) { RADIUS_DEBUG("Failed to add WFA-HS20-T-C-URL"); os_free(url2); radius_msg_free(msg); return NULL; } os_free(url2); radius_srv_hs20_t_c_pending(sess); } #endif /* CONFIG_HS20 */ if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); radius_msg_free(msg); return NULL; } if (code == RADIUS_CODE_ACCESS_ACCEPT) { struct hostapd_radius_attr *attr; for (attr = sess->accept_attr; attr; attr = attr->next) { if (!radius_msg_add_attr(msg, attr->type, wpabuf_head(attr->val), wpabuf_len(attr->val))) { wpa_printf(MSG_ERROR, "Could not add RADIUS attribute"); radius_msg_free(msg); return NULL; } } } if (code == RADIUS_CODE_ACCESS_REJECT) { if (radius_msg_add_attr_int32(msg, RADIUS_ATTR_WLAN_REASON_CODE, reason) < 0) { RADIUS_DEBUG("Failed to add WLAN-Reason-Code attribute"); radius_msg_free(msg); return NULL; } } if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, client->shared_secret_len, hdr->authenticator) < 0) { RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); } if (code == RADIUS_CODE_ACCESS_ACCEPT) radius_server_add_session(sess); return msg; } static struct radius_msg * radius_server_macacl(struct radius_server_data *data, struct radius_client *client, struct radius_session *sess, struct radius_msg *request) { struct radius_msg *msg; int code; struct radius_hdr *hdr = radius_msg_get_hdr(request); u8 *pw; size_t pw_len; code = RADIUS_CODE_ACCESS_ACCEPT; if (radius_msg_get_attr_ptr(request, RADIUS_ATTR_USER_PASSWORD, &pw, &pw_len, NULL) < 0) { RADIUS_DEBUG("Could not get User-Password"); code = RADIUS_CODE_ACCESS_REJECT; } else { int res; struct eap_user tmp; os_memset(&tmp, 0, sizeof(tmp)); res = data->get_eap_user(data->conf_ctx, (u8 *) sess->username, os_strlen(sess->username), 0, &tmp); if (res || !tmp.macacl || tmp.password == NULL) { RADIUS_DEBUG("No MAC ACL user entry"); bin_clear_free(tmp.password, tmp.password_len); code = RADIUS_CODE_ACCESS_REJECT; } else { u8 buf[128]; res = radius_user_password_hide( request, tmp.password, tmp.password_len, (u8 *) client->shared_secret, client->shared_secret_len, buf, sizeof(buf)); bin_clear_free(tmp.password, tmp.password_len); if (res < 0 || pw_len != (size_t) res || os_memcmp_const(pw, buf, res) != 0) { RADIUS_DEBUG("Incorrect User-Password"); code = RADIUS_CODE_ACCESS_REJECT; } } } msg = radius_msg_new(code, hdr->identifier); if (msg == NULL) { RADIUS_DEBUG("Failed to allocate reply message"); return NULL; } if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); radius_msg_free(msg); return NULL; } if (code == RADIUS_CODE_ACCESS_ACCEPT) { struct hostapd_radius_attr *attr; for (attr = sess->accept_attr; attr; attr = attr->next) { if (!radius_msg_add_attr(msg, attr->type, wpabuf_head(attr->val), wpabuf_len(attr->val))) { wpa_printf(MSG_ERROR, "Could not add RADIUS attribute"); radius_msg_free(msg); return NULL; } } } if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, client->shared_secret_len, hdr->authenticator) < 0) { RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); } return msg; } static int radius_server_reject(struct radius_server_data *data, struct radius_client *client, struct radius_msg *request, struct sockaddr *from, socklen_t fromlen, const char *from_addr, int from_port) { struct radius_msg *msg; int ret = 0; struct eap_hdr eapfail; struct wpabuf *buf; struct radius_hdr *hdr = radius_msg_get_hdr(request); RADIUS_DEBUG("Reject invalid request from %s:%d", from_addr, from_port); msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier); if (msg == NULL) { return -1; } os_memset(&eapfail, 0, sizeof(eapfail)); eapfail.code = EAP_CODE_FAILURE; eapfail.identifier = 0; eapfail.length = host_to_be16(sizeof(eapfail)); if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) { RADIUS_DEBUG("Failed to add EAP-Message attribute"); } if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) { RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)"); radius_msg_free(msg); return -1; } if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret, client->shared_secret_len, hdr->authenticator) < 0) { RADIUS_DEBUG("Failed to add Message-Authenticator attribute"); } if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(msg); } data->counters.access_rejects++; client->counters.access_rejects++; buf = radius_msg_get_buf(msg); if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0, (struct sockaddr *) from, sizeof(*from)) < 0) { wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno)); ret = -1; } radius_msg_free(msg); return ret; } static void radius_server_hs20_t_c_check(struct radius_session *sess, struct radius_msg *msg) { #ifdef CONFIG_HS20 u8 *buf, *pos, *end, type, sublen, *timestamp = NULL; size_t len; buf = NULL; for (;;) { if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_VENDOR_SPECIFIC, &buf, &len, buf) < 0) break; if (len < 6) continue; pos = buf; end = buf + len; if (WPA_GET_BE32(pos) != RADIUS_VENDOR_ID_WFA) continue; pos += 4; type = *pos++; sublen = *pos++; if (sublen < 2) continue; /* invalid length */ sublen -= 2; /* skip header */ if (pos + sublen > end) continue; /* invalid WFA VSA */ if (type == RADIUS_VENDOR_ATTR_WFA_HS20_TIMESTAMP && len >= 4) { timestamp = pos; break; } } if (!timestamp) return; RADIUS_DEBUG("HS20-Timestamp: %u", WPA_GET_BE32(timestamp)); if (sess->t_c_timestamp != WPA_GET_BE32(timestamp)) { RADIUS_DEBUG("Last read T&C timestamp does not match HS20-Timestamp --> require filtering"); sess->t_c_filtering = 1; } #endif /* CONFIG_HS20 */ } static int radius_server_request(struct radius_server_data *data, struct radius_msg *msg, struct sockaddr *from, socklen_t fromlen, struct radius_client *client, const char *from_addr, int from_port, struct radius_session *force_sess) { struct wpabuf *eap = NULL; int res, state_included = 0; u8 statebuf[4]; unsigned int state; struct radius_session *sess; struct radius_msg *reply; int is_complete = 0; if (force_sess) sess = force_sess; else { res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf, sizeof(statebuf)); state_included = res >= 0; if (res == sizeof(statebuf)) { state = WPA_GET_BE32(statebuf); sess = radius_server_get_session(client, state); } else { sess = NULL; } } if (sess) { RADIUS_DEBUG("Request for session 0x%x", sess->sess_id); } else if (state_included) { RADIUS_DEBUG("State attribute included but no session found"); radius_server_reject(data, client, msg, from, fromlen, from_addr, from_port); return -1; } else { sess = radius_server_get_new_session(data, client, msg, from_addr); if (sess == NULL) { RADIUS_DEBUG("Could not create a new session"); radius_server_reject(data, client, msg, from, fromlen, from_addr, from_port); return -1; } } if (sess->last_from_port == from_port && sess->last_identifier == radius_msg_get_hdr(msg)->identifier && os_memcmp(sess->last_authenticator, radius_msg_get_hdr(msg)->authenticator, 16) == 0) { RADIUS_DEBUG("Duplicate message from %s", from_addr); data->counters.dup_access_requests++; client->counters.dup_access_requests++; if (sess->last_reply) { struct wpabuf *buf; buf = radius_msg_get_buf(sess->last_reply); res = sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0, (struct sockaddr *) from, fromlen); if (res < 0) { wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno)); } return 0; } RADIUS_DEBUG("No previous reply available for duplicate " "message"); return -1; } eap = radius_msg_get_eap(msg); if (eap == NULL && sess->macacl) { reply = radius_server_macacl(data, client, sess, msg); if (reply == NULL) return -1; goto send_reply; } if (eap == NULL) { RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s", from_addr); data->counters.packets_dropped++; client->counters.packets_dropped++; return -1; } RADIUS_DUMP("Received EAP data", wpabuf_head(eap), wpabuf_len(eap)); /* FIX: if Code is Request, Success, or Failure, send Access-Reject; * RFC3579 Sect. 2.6.2. * Include EAP-Response/Nak with no preferred method if * code == request. * If code is not 1-4, discard the packet silently. * Or is this already done by the EAP state machine? */ wpabuf_free(sess->eap_if->eapRespData); sess->eap_if->eapRespData = eap; sess->eap_if->eapResp = true; eap_server_sm_step(sess->eap); if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess || sess->eap_if->eapFail) && sess->eap_if->eapReqData) { RADIUS_DUMP("EAP data from the state machine", wpabuf_head(sess->eap_if->eapReqData), wpabuf_len(sess->eap_if->eapReqData)); } else if (sess->eap_if->eapFail) { RADIUS_DEBUG("No EAP data from the state machine, but eapFail " "set"); } else if (eap_sm_method_pending(sess->eap)) { radius_msg_free(sess->last_msg); sess->last_msg = msg; sess->last_from_port = from_port; os_free(sess->last_from_addr); sess->last_from_addr = os_strdup(from_addr); sess->last_fromlen = fromlen; os_memcpy(&sess->last_from, from, fromlen); return -2; } else { RADIUS_DEBUG("No EAP data from the state machine - ignore this" " Access-Request silently (assuming it was a " "duplicate)"); data->counters.packets_dropped++; client->counters.packets_dropped++; return -1; } if (sess->eap_if->eapSuccess || sess->eap_if->eapFail) is_complete = 1; if (sess->eap_if->eapFail) { srv_log(sess, "EAP authentication failed"); db_update_last_msk(sess, "FAIL"); } else if (sess->eap_if->eapSuccess) { srv_log(sess, "EAP authentication succeeded"); } if (sess->eap_if->eapSuccess) radius_server_hs20_t_c_check(sess, msg); reply = radius_server_encapsulate_eap(data, client, sess, msg); send_reply: if (reply) { struct wpabuf *buf; struct radius_hdr *hdr; RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port); if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(reply); } switch (radius_msg_get_hdr(reply)->code) { case RADIUS_CODE_ACCESS_ACCEPT: srv_log(sess, "Sending Access-Accept"); data->counters.access_accepts++; client->counters.access_accepts++; break; case RADIUS_CODE_ACCESS_REJECT: srv_log(sess, "Sending Access-Reject"); data->counters.access_rejects++; client->counters.access_rejects++; break; case RADIUS_CODE_ACCESS_CHALLENGE: data->counters.access_challenges++; client->counters.access_challenges++; break; } buf = radius_msg_get_buf(reply); res = sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0, (struct sockaddr *) from, fromlen); if (res < 0) { wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno)); } radius_msg_free(sess->last_reply); sess->last_reply = reply; sess->last_from_port = from_port; hdr = radius_msg_get_hdr(msg); sess->last_identifier = hdr->identifier; os_memcpy(sess->last_authenticator, hdr->authenticator, 16); } else { data->counters.packets_dropped++; client->counters.packets_dropped++; } if (is_complete) { RADIUS_DEBUG("Removing completed session 0x%x after timeout", sess->sess_id); eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess); eloop_register_timeout(RADIUS_SESSION_MAINTAIN, 0, radius_server_session_remove_timeout, data, sess); } return 0; } static void radius_server_receive_disconnect_resp(struct radius_server_data *data, struct radius_client *client, struct radius_msg *msg, int ack) { struct radius_hdr *hdr; if (!client->pending_dac_disconnect_req) { RADIUS_DEBUG("Ignore unexpected Disconnect response"); radius_msg_free(msg); return; } hdr = radius_msg_get_hdr(msg); if (hdr->identifier != client->pending_dac_disconnect_id) { RADIUS_DEBUG("Ignore unexpected Disconnect response with unexpected identifier %u (expected %u)", hdr->identifier, client->pending_dac_disconnect_id); radius_msg_free(msg); return; } if (radius_msg_verify(msg, (const u8 *) client->shared_secret, client->shared_secret_len, client->pending_dac_disconnect_req, 0)) { RADIUS_DEBUG("Ignore Disconnect response with invalid authenticator"); radius_msg_free(msg); return; } RADIUS_DEBUG("Disconnect-%s received for " MACSTR, ack ? "ACK" : "NAK", MAC2STR(client->pending_dac_disconnect_addr)); radius_msg_free(msg); radius_msg_free(client->pending_dac_disconnect_req); client->pending_dac_disconnect_req = NULL; } static void radius_server_receive_coa_resp(struct radius_server_data *data, struct radius_client *client, struct radius_msg *msg, int ack) { struct radius_hdr *hdr; #ifdef CONFIG_SQLITE char addrtxt[3 * ETH_ALEN]; char *sql; int res; #endif /* CONFIG_SQLITE */ if (!client->pending_dac_coa_req) { RADIUS_DEBUG("Ignore unexpected CoA response"); radius_msg_free(msg); return; } hdr = radius_msg_get_hdr(msg); if (hdr->identifier != client->pending_dac_coa_id) { RADIUS_DEBUG("Ignore unexpected CoA response with unexpected identifier %u (expected %u)", hdr->identifier, client->pending_dac_coa_id); radius_msg_free(msg); return; } if (radius_msg_verify(msg, (const u8 *) client->shared_secret, client->shared_secret_len, client->pending_dac_coa_req, 0)) { RADIUS_DEBUG("Ignore CoA response with invalid authenticator"); radius_msg_free(msg); return; } RADIUS_DEBUG("CoA-%s received for " MACSTR, ack ? "ACK" : "NAK", MAC2STR(client->pending_dac_coa_addr)); radius_msg_free(msg); radius_msg_free(client->pending_dac_coa_req); client->pending_dac_coa_req = NULL; #ifdef CONFIG_SQLITE if (!data->db) return; os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(client->pending_dac_coa_addr)); if (ack) { sql = sqlite3_mprintf("UPDATE current_sessions SET hs20_t_c_filtering=0, waiting_coa_ack=0, coa_ack_received=1 WHERE mac_addr=%Q", addrtxt); } else { sql = sqlite3_mprintf("UPDATE current_sessions SET waiting_coa_ack=0 WHERE mac_addr=%Q", addrtxt); } if (!sql) return; res = sqlite3_exec(data->db, sql, NULL, NULL, NULL); sqlite3_free(sql); if (res != SQLITE_OK) { RADIUS_ERROR("Failed to update current_sessions entry: %s", sqlite3_errmsg(data->db)); return; } #endif /* CONFIG_SQLITE */ } static void radius_server_receive_auth(int sock, void *eloop_ctx, void *sock_ctx) { struct radius_server_data *data = eloop_ctx; u8 *buf = NULL; union { struct sockaddr_storage ss; struct sockaddr_in sin; #ifdef CONFIG_IPV6 struct sockaddr_in6 sin6; #endif /* CONFIG_IPV6 */ } from; socklen_t fromlen; int len; struct radius_client *client = NULL; struct radius_msg *msg = NULL; char abuf[50]; int from_port = 0; buf = os_malloc(RADIUS_MAX_MSG_LEN); if (buf == NULL) { goto fail; } fromlen = sizeof(from); len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0, (struct sockaddr *) &from.ss, &fromlen); if (len < 0) { wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s", strerror(errno)); goto fail; } #ifdef CONFIG_IPV6 if (data->ipv6) { if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf, sizeof(abuf)) == NULL) abuf[0] = '\0'; from_port = ntohs(from.sin6.sin6_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, (struct in_addr *) &from.sin6.sin6_addr, 1); } #endif /* CONFIG_IPV6 */ if (!data->ipv6) { os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf)); from_port = ntohs(from.sin.sin_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, &from.sin.sin_addr, 0); } RADIUS_DUMP("Received data", buf, len); if (client == NULL) { RADIUS_DEBUG("Unknown client %s - packet ignored", abuf); data->counters.invalid_requests++; goto fail; } msg = radius_msg_parse(buf, len); if (msg == NULL) { RADIUS_DEBUG("Parsing incoming RADIUS frame failed"); data->counters.malformed_access_requests++; client->counters.malformed_access_requests++; goto fail; } os_free(buf); buf = NULL; if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(msg); } if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_DISCONNECT_ACK) { radius_server_receive_disconnect_resp(data, client, msg, 1); return; } if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_DISCONNECT_NAK) { radius_server_receive_disconnect_resp(data, client, msg, 0); return; } if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_ACK) { radius_server_receive_coa_resp(data, client, msg, 1); return; } if (radius_msg_get_hdr(msg)->code == RADIUS_CODE_COA_NAK) { radius_server_receive_coa_resp(data, client, msg, 0); return; } if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) { RADIUS_DEBUG("Unexpected RADIUS code %d", radius_msg_get_hdr(msg)->code); data->counters.unknown_types++; client->counters.unknown_types++; goto fail; } data->counters.access_requests++; client->counters.access_requests++; if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret, client->shared_secret_len, NULL)) { RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf); data->counters.bad_authenticators++; client->counters.bad_authenticators++; goto fail; } if (radius_server_request(data, msg, (struct sockaddr *) &from, fromlen, client, abuf, from_port, NULL) == -2) return; /* msg was stored with the session */ fail: radius_msg_free(msg); os_free(buf); } static void radius_server_receive_acct(int sock, void *eloop_ctx, void *sock_ctx) { struct radius_server_data *data = eloop_ctx; u8 *buf = NULL; union { struct sockaddr_storage ss; struct sockaddr_in sin; #ifdef CONFIG_IPV6 struct sockaddr_in6 sin6; #endif /* CONFIG_IPV6 */ } from; socklen_t fromlen; int len, res; struct radius_client *client = NULL; struct radius_msg *msg = NULL, *resp = NULL; char abuf[50]; int from_port = 0; struct radius_hdr *hdr; struct wpabuf *rbuf; buf = os_malloc(RADIUS_MAX_MSG_LEN); if (buf == NULL) { goto fail; } fromlen = sizeof(from); len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0, (struct sockaddr *) &from.ss, &fromlen); if (len < 0) { wpa_printf(MSG_INFO, "recvfrom[radius_server]: %s", strerror(errno)); goto fail; } #ifdef CONFIG_IPV6 if (data->ipv6) { if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf, sizeof(abuf)) == NULL) abuf[0] = '\0'; from_port = ntohs(from.sin6.sin6_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, (struct in_addr *) &from.sin6.sin6_addr, 1); } #endif /* CONFIG_IPV6 */ if (!data->ipv6) { os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf)); from_port = ntohs(from.sin.sin_port); RADIUS_DEBUG("Received %d bytes from %s:%d", len, abuf, from_port); client = radius_server_get_client(data, &from.sin.sin_addr, 0); } RADIUS_DUMP("Received data", buf, len); if (client == NULL) { RADIUS_DEBUG("Unknown client %s - packet ignored", abuf); data->counters.invalid_acct_requests++; goto fail; } msg = radius_msg_parse(buf, len); if (msg == NULL) { RADIUS_DEBUG("Parsing incoming RADIUS frame failed"); data->counters.malformed_acct_requests++; client->counters.malformed_acct_requests++; goto fail; } os_free(buf); buf = NULL; if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(msg); } if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCOUNTING_REQUEST) { RADIUS_DEBUG("Unexpected RADIUS code %d", radius_msg_get_hdr(msg)->code); data->counters.unknown_acct_types++; client->counters.unknown_acct_types++; goto fail; } data->counters.acct_requests++; client->counters.acct_requests++; if (radius_msg_verify_acct_req(msg, (u8 *) client->shared_secret, client->shared_secret_len)) { RADIUS_DEBUG("Invalid Authenticator from %s", abuf); data->counters.acct_bad_authenticators++; client->counters.acct_bad_authenticators++; goto fail; } /* TODO: Write accounting information to a file or database */ hdr = radius_msg_get_hdr(msg); resp = radius_msg_new(RADIUS_CODE_ACCOUNTING_RESPONSE, hdr->identifier); if (resp == NULL) goto fail; radius_msg_finish_acct_resp(resp, (u8 *) client->shared_secret, client->shared_secret_len, hdr->authenticator); RADIUS_DEBUG("Reply to %s:%d", abuf, from_port); if (wpa_debug_level <= MSG_MSGDUMP) { radius_msg_dump(resp); } rbuf = radius_msg_get_buf(resp); data->counters.acct_responses++; client->counters.acct_responses++; res = sendto(data->acct_sock, wpabuf_head(rbuf), wpabuf_len(rbuf), 0, (struct sockaddr *) &from.ss, fromlen); if (res < 0) { wpa_printf(MSG_INFO, "sendto[RADIUS SRV]: %s", strerror(errno)); } fail: radius_msg_free(resp); radius_msg_free(msg); os_free(buf); } static int radius_server_disable_pmtu_discovery(int s) { int r = -1; #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT) /* Turn off Path MTU discovery on IPv4/UDP sockets. */ int action = IP_PMTUDISC_DONT; r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action, sizeof(action)); if (r == -1) wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: " "%s", strerror(errno)); #endif return r; } static int radius_server_open_socket(int port) { int s; struct sockaddr_in addr; s = socket(PF_INET, SOCK_DGRAM, 0); if (s < 0) { wpa_printf(MSG_INFO, "RADIUS: socket: %s", strerror(errno)); return -1; } radius_server_disable_pmtu_discovery(s); os_memset(&addr, 0, sizeof(addr)); addr.sin_family = AF_INET; addr.sin_port = htons(port); if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno)); close(s); return -1; } return s; } #ifdef CONFIG_IPV6 static int radius_server_open_socket6(int port) { int s; struct sockaddr_in6 addr; s = socket(PF_INET6, SOCK_DGRAM, 0); if (s < 0) { wpa_printf(MSG_INFO, "RADIUS: socket[IPv6]: %s", strerror(errno)); return -1; } os_memset(&addr, 0, sizeof(addr)); addr.sin6_family = AF_INET6; os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any)); addr.sin6_port = htons(port); if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) { wpa_printf(MSG_INFO, "RADIUS: bind: %s", strerror(errno)); close(s); return -1; } return s; } #endif /* CONFIG_IPV6 */ static void radius_server_free_sessions(struct radius_server_data *data, struct radius_session *sessions) { struct radius_session *session, *prev; session = sessions; while (session) { prev = session; session = session->next; radius_server_session_free(data, prev); } } static void radius_server_free_clients(struct radius_server_data *data, struct radius_client *clients) { struct radius_client *client, *prev; client = clients; while (client) { prev = client; client = client->next; radius_server_free_sessions(data, prev->sessions); os_free(prev->shared_secret); radius_msg_free(prev->pending_dac_coa_req); radius_msg_free(prev->pending_dac_disconnect_req); os_free(prev); } } static struct radius_client * radius_server_read_clients(const char *client_file, int ipv6) { FILE *f; const int buf_size = 1024; char *buf, *pos; struct radius_client *clients, *tail, *entry; int line = 0, mask, failed = 0, i; struct in_addr addr; #ifdef CONFIG_IPV6 struct in6_addr addr6; #endif /* CONFIG_IPV6 */ unsigned int val; f = fopen(client_file, "r"); if (f == NULL) { RADIUS_ERROR("Could not open client file '%s'", client_file); return NULL; } buf = os_malloc(buf_size); if (buf == NULL) { fclose(f); return NULL; } clients = tail = NULL; while (fgets(buf, buf_size, f)) { /* Configuration file format: * 192.168.1.0/24 secret * 192.168.1.2 secret * fe80::211:22ff:fe33:4455/64 secretipv6 */ line++; buf[buf_size - 1] = '\0'; pos = buf; while (*pos != '\0' && *pos != '\n') pos++; if (*pos == '\n') *pos = '\0'; if (*buf == '\0' || *buf == '#') continue; pos = buf; while ((*pos >= '0' && *pos <= '9') || *pos == '.' || (*pos >= 'a' && *pos <= 'f') || *pos == ':' || (*pos >= 'A' && *pos <= 'F')) { pos++; } if (*pos == '\0') { failed = 1; break; } if (*pos == '/') { char *end; *pos++ = '\0'; mask = strtol(pos, &end, 10); if ((pos == end) || (mask < 0 || mask > (ipv6 ? 128 : 32))) { failed = 1; break; } pos = end; } else { mask = ipv6 ? 128 : 32; *pos++ = '\0'; } if (!ipv6 && inet_aton(buf, &addr) == 0) { failed = 1; break; } #ifdef CONFIG_IPV6 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) { if (inet_pton(AF_INET, buf, &addr) <= 0) { failed = 1; break; } /* Convert IPv4 address to IPv6 */ if (mask <= 32) mask += (128 - 32); os_memset(addr6.s6_addr, 0, 10); addr6.s6_addr[10] = 0xff; addr6.s6_addr[11] = 0xff; os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr, 4); } #endif /* CONFIG_IPV6 */ while (*pos == ' ' || *pos == '\t') { pos++; } if (*pos == '\0') { failed = 1; break; } entry = os_zalloc(sizeof(*entry)); if (entry == NULL) { failed = 1; break; } entry->shared_secret = os_strdup(pos); if (entry->shared_secret == NULL) { failed = 1; os_free(entry); break; } entry->shared_secret_len = os_strlen(entry->shared_secret); if (!ipv6) { entry->addr.s_addr = addr.s_addr; val = 0; for (i = 0; i < mask; i++) val |= 1U << (31 - i); entry->mask.s_addr = htonl(val); } #ifdef CONFIG_IPV6 if (ipv6) { int offset = mask / 8; os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16); os_memset(entry->mask6.s6_addr, 0xff, offset); val = 0; for (i = 0; i < (mask % 8); i++) val |= 1 << (7 - i); if (offset < 16) entry->mask6.s6_addr[offset] = val; } #endif /* CONFIG_IPV6 */ if (tail == NULL) { clients = tail = entry; } else { tail->next = entry; tail = entry; } } if (failed) { RADIUS_ERROR("Invalid line %d in '%s'", line, client_file); radius_server_free_clients(NULL, clients); clients = NULL; } os_free(buf); fclose(f); return clients; } /** * radius_server_init - Initialize RADIUS server * @conf: Configuration for the RADIUS server * Returns: Pointer to private RADIUS server context or %NULL on failure * * This initializes a RADIUS server instance and returns a context pointer that * will be used in other calls to the RADIUS server module. The server can be * deinitialize by calling radius_server_deinit(). */ struct radius_server_data * radius_server_init(struct radius_server_conf *conf) { struct radius_server_data *data; #ifndef CONFIG_IPV6 if (conf->ipv6) { wpa_printf(MSG_ERROR, "RADIUS server compiled without IPv6 support"); return NULL; } #endif /* CONFIG_IPV6 */ data = os_zalloc(sizeof(*data)); if (data == NULL) return NULL; data->eap_cfg = conf->eap_cfg; data->auth_sock = -1; data->acct_sock = -1; dl_list_init(&data->erp_keys); os_get_reltime(&data->start_time); data->conf_ctx = conf->conf_ctx; conf->eap_cfg->backend_auth = true; conf->eap_cfg->eap_server = 1; data->ipv6 = conf->ipv6; data->get_eap_user = conf->get_eap_user; if (conf->eap_req_id_text) { data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len); if (!data->eap_req_id_text) goto fail; os_memcpy(data->eap_req_id_text, conf->eap_req_id_text, conf->eap_req_id_text_len); data->eap_req_id_text_len = conf->eap_req_id_text_len; } data->erp_domain = conf->erp_domain; if (conf->subscr_remediation_url) { data->subscr_remediation_url = os_strdup(conf->subscr_remediation_url); if (!data->subscr_remediation_url) goto fail; } data->subscr_remediation_method = conf->subscr_remediation_method; if (conf->hs20_sim_provisioning_url) { data->hs20_sim_provisioning_url = os_strdup(conf->hs20_sim_provisioning_url); if (!data->hs20_sim_provisioning_url) goto fail; } if (conf->t_c_server_url) { data->t_c_server_url = os_strdup(conf->t_c_server_url); if (!data->t_c_server_url) goto fail; } #ifdef CONFIG_SQLITE if (conf->sqlite_file) { if (sqlite3_open(conf->sqlite_file, &data->db)) { RADIUS_ERROR("Could not open SQLite file '%s'", conf->sqlite_file); goto fail; } } #endif /* CONFIG_SQLITE */ #ifdef CONFIG_RADIUS_TEST if (conf->dump_msk_file) data->dump_msk_file = os_strdup(conf->dump_msk_file); #endif /* CONFIG_RADIUS_TEST */ data->clients = radius_server_read_clients(conf->client_file, conf->ipv6); if (data->clients == NULL) { wpa_printf(MSG_ERROR, "No RADIUS clients configured"); goto fail; } #ifdef CONFIG_IPV6 if (conf->ipv6) data->auth_sock = radius_server_open_socket6(conf->auth_port); else #endif /* CONFIG_IPV6 */ data->auth_sock = radius_server_open_socket(conf->auth_port); if (data->auth_sock < 0) { wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS authentication server"); goto fail; } if (eloop_register_read_sock(data->auth_sock, radius_server_receive_auth, data, NULL)) { goto fail; } if (conf->acct_port) { #ifdef CONFIG_IPV6 if (conf->ipv6) data->acct_sock = radius_server_open_socket6( conf->acct_port); else #endif /* CONFIG_IPV6 */ data->acct_sock = radius_server_open_socket(conf->acct_port); if (data->acct_sock < 0) { wpa_printf(MSG_ERROR, "Failed to open UDP socket for RADIUS accounting server"); goto fail; } if (eloop_register_read_sock(data->acct_sock, radius_server_receive_acct, data, NULL)) goto fail; } else { data->acct_sock = -1; } return data; fail: radius_server_deinit(data); return NULL; } /** * radius_server_erp_flush - Flush all ERP keys * @data: RADIUS server context from radius_server_init() */ void radius_server_erp_flush(struct radius_server_data *data) { struct eap_server_erp_key *erp; if (data == NULL) return; while ((erp = dl_list_first(&data->erp_keys, struct eap_server_erp_key, list)) != NULL) { dl_list_del(&erp->list); bin_clear_free(erp, sizeof(*erp)); } } /** * radius_server_deinit - Deinitialize RADIUS server * @data: RADIUS server context from radius_server_init() */ void radius_server_deinit(struct radius_server_data *data) { if (data == NULL) return; if (data->auth_sock >= 0) { eloop_unregister_read_sock(data->auth_sock); close(data->auth_sock); } if (data->acct_sock >= 0) { eloop_unregister_read_sock(data->acct_sock); close(data->acct_sock); } radius_server_free_clients(data, data->clients); os_free(data->eap_req_id_text); #ifdef CONFIG_RADIUS_TEST os_free(data->dump_msk_file); #endif /* CONFIG_RADIUS_TEST */ os_free(data->subscr_remediation_url); os_free(data->hs20_sim_provisioning_url); os_free(data->t_c_server_url); #ifdef CONFIG_SQLITE if (data->db) sqlite3_close(data->db); #endif /* CONFIG_SQLITE */ radius_server_erp_flush(data); os_free(data); } /** * radius_server_get_mib - Get RADIUS server MIB information * @data: RADIUS server context from radius_server_init() * @buf: Buffer for returning the MIB data in text format * @buflen: buf length in octets * Returns: Number of octets written into buf */ int radius_server_get_mib(struct radius_server_data *data, char *buf, size_t buflen) { int ret, uptime; unsigned int idx; char *end, *pos; struct os_reltime now; struct radius_client *cli; /* RFC 2619 - RADIUS Authentication Server MIB */ if (data == NULL || buflen == 0) return 0; pos = buf; end = buf + buflen; os_get_reltime(&now); uptime = (now.sec - data->start_time.sec) * 100 + ((now.usec - data->start_time.usec) / 10000) % 100; ret = os_snprintf(pos, end - pos, "RADIUS-AUTH-SERVER-MIB\n" "radiusAuthServIdent=hostapd\n" "radiusAuthServUpTime=%d\n" "radiusAuthServResetTime=0\n" "radiusAuthServConfigReset=4\n", uptime); if (os_snprintf_error(end - pos, ret)) { *pos = '\0'; return pos - buf; } pos += ret; ret = os_snprintf(pos, end - pos, "radiusAuthServTotalAccessRequests=%u\n" "radiusAuthServTotalInvalidRequests=%u\n" "radiusAuthServTotalDupAccessRequests=%u\n" "radiusAuthServTotalAccessAccepts=%u\n" "radiusAuthServTotalAccessRejects=%u\n" "radiusAuthServTotalAccessChallenges=%u\n" "radiusAuthServTotalMalformedAccessRequests=%u\n" "radiusAuthServTotalBadAuthenticators=%u\n" "radiusAuthServTotalPacketsDropped=%u\n" "radiusAuthServTotalUnknownTypes=%u\n" "radiusAccServTotalRequests=%u\n" "radiusAccServTotalInvalidRequests=%u\n" "radiusAccServTotalResponses=%u\n" "radiusAccServTotalMalformedRequests=%u\n" "radiusAccServTotalBadAuthenticators=%u\n" "radiusAccServTotalUnknownTypes=%u\n", data->counters.access_requests, data->counters.invalid_requests, data->counters.dup_access_requests, data->counters.access_accepts, data->counters.access_rejects, data->counters.access_challenges, data->counters.malformed_access_requests, data->counters.bad_authenticators, data->counters.packets_dropped, data->counters.unknown_types, data->counters.acct_requests, data->counters.invalid_acct_requests, data->counters.acct_responses, data->counters.malformed_acct_requests, data->counters.acct_bad_authenticators, data->counters.unknown_acct_types); if (os_snprintf_error(end - pos, ret)) { *pos = '\0'; return pos - buf; } pos += ret; for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) { char abuf[50], mbuf[50]; #ifdef CONFIG_IPV6 if (data->ipv6) { if (inet_ntop(AF_INET6, &cli->addr6, abuf, sizeof(abuf)) == NULL) abuf[0] = '\0'; if (inet_ntop(AF_INET6, &cli->mask6, mbuf, sizeof(mbuf)) == NULL) mbuf[0] = '\0'; } #endif /* CONFIG_IPV6 */ if (!data->ipv6) { os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf)); os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf)); } ret = os_snprintf(pos, end - pos, "radiusAuthClientIndex=%u\n" "radiusAuthClientAddress=%s/%s\n" "radiusAuthServAccessRequests=%u\n" "radiusAuthServDupAccessRequests=%u\n" "radiusAuthServAccessAccepts=%u\n" "radiusAuthServAccessRejects=%u\n" "radiusAuthServAccessChallenges=%u\n" "radiusAuthServMalformedAccessRequests=%u\n" "radiusAuthServBadAuthenticators=%u\n" "radiusAuthServPacketsDropped=%u\n" "radiusAuthServUnknownTypes=%u\n" "radiusAccServTotalRequests=%u\n" "radiusAccServTotalInvalidRequests=%u\n" "radiusAccServTotalResponses=%u\n" "radiusAccServTotalMalformedRequests=%u\n" "radiusAccServTotalBadAuthenticators=%u\n" "radiusAccServTotalUnknownTypes=%u\n", idx, abuf, mbuf, cli->counters.access_requests, cli->counters.dup_access_requests, cli->counters.access_accepts, cli->counters.access_rejects, cli->counters.access_challenges, cli->counters.malformed_access_requests, cli->counters.bad_authenticators, cli->counters.packets_dropped, cli->counters.unknown_types, cli->counters.acct_requests, cli->counters.invalid_acct_requests, cli->counters.acct_responses, cli->counters.malformed_acct_requests, cli->counters.acct_bad_authenticators, cli->counters.unknown_acct_types); if (os_snprintf_error(end - pos, ret)) { *pos = '\0'; return pos - buf; } pos += ret; } return pos - buf; } static int radius_server_get_eap_user(void *ctx, const u8 *identity, size_t identity_len, int phase2, struct eap_user *user) { struct radius_session *sess = ctx; struct radius_server_data *data = sess->server; int ret; ret = data->get_eap_user(data->conf_ctx, identity, identity_len, phase2, user); if (ret == 0 && user) { sess->accept_attr = user->accept_attr; sess->remediation = user->remediation; sess->macacl = user->macacl; sess->t_c_timestamp = user->t_c_timestamp; } if (ret) { RADIUS_DEBUG("%s: User-Name not found from user database", __func__); } return ret; } static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len) { struct radius_session *sess = ctx; struct radius_server_data *data = sess->server; *len = data->eap_req_id_text_len; return data->eap_req_id_text; } static void radius_server_log_msg(void *ctx, const char *msg) { struct radius_session *sess = ctx; srv_log(sess, "EAP: %s", msg); } #ifdef CONFIG_ERP static const char * radius_server_get_erp_domain(void *ctx) { struct radius_session *sess = ctx; struct radius_server_data *data = sess->server; return data->erp_domain; } static struct eap_server_erp_key * radius_server_erp_get_key(void *ctx, const char *keyname) { struct radius_session *sess = ctx; struct radius_server_data *data = sess->server; return radius_server_erp_find_key(data, keyname); } static int radius_server_erp_add_key(void *ctx, struct eap_server_erp_key *erp) { struct radius_session *sess = ctx; struct radius_server_data *data = sess->server; dl_list_add(&data->erp_keys, &erp->list); return 0; } #endif /* CONFIG_ERP */ static const struct eapol_callbacks radius_server_eapol_cb = { .get_eap_user = radius_server_get_eap_user, .get_eap_req_id_text = radius_server_get_eap_req_id_text, .log_msg = radius_server_log_msg, #ifdef CONFIG_ERP .get_erp_send_reauth_start = NULL, .get_erp_domain = radius_server_get_erp_domain, .erp_get_key = radius_server_erp_get_key, .erp_add_key = radius_server_erp_add_key, #endif /* CONFIG_ERP */ }; /** * radius_server_eap_pending_cb - Pending EAP data notification * @data: RADIUS server context from radius_server_init() * @ctx: Pending EAP context pointer * * This function is used to notify EAP server module that a pending operation * has been completed and processing of the EAP session can proceed. */ void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx) { struct radius_client *cli; struct radius_session *s, *sess = NULL; struct radius_msg *msg; if (data == NULL) return; for (cli = data->clients; cli; cli = cli->next) { for (s = cli->sessions; s; s = s->next) { if (s->eap == ctx && s->last_msg) { sess = s; break; } } if (sess) break; } if (sess == NULL) { RADIUS_DEBUG("No session matched callback ctx"); return; } msg = sess->last_msg; sess->last_msg = NULL; eap_sm_pending_cb(sess->eap); if (radius_server_request(data, msg, (struct sockaddr *) &sess->last_from, sess->last_fromlen, cli, sess->last_from_addr, sess->last_from_port, sess) == -2) return; /* msg was stored with the session */ radius_msg_free(msg); } #ifdef CONFIG_SQLITE struct db_session_fields { char *identity; char *nas; int hs20_t_c_filtering; int waiting_coa_ack; int coa_ack_received; }; static int get_db_session_fields(void *ctx, int argc, char *argv[], char *col[]) { struct db_session_fields *fields = ctx; int i; for (i = 0; i < argc; i++) { if (!argv[i]) continue; RADIUS_DEBUG("Session DB: %s=%s", col[i], argv[i]); if (os_strcmp(col[i], "identity") == 0) { os_free(fields->identity); fields->identity = os_strdup(argv[i]); } else if (os_strcmp(col[i], "nas") == 0) { os_free(fields->nas); fields->nas = os_strdup(argv[i]); } else if (os_strcmp(col[i], "hs20_t_c_filtering") == 0) { fields->hs20_t_c_filtering = atoi(argv[i]); } else if (os_strcmp(col[i], "waiting_coa_ack") == 0) { fields->waiting_coa_ack = atoi(argv[i]); } else if (os_strcmp(col[i], "coa_ack_received") == 0) { fields->coa_ack_received = atoi(argv[i]); } } return 0; } static void free_db_session_fields(struct db_session_fields *fields) { os_free(fields->identity); fields->identity = NULL; os_free(fields->nas); fields->nas = NULL; } #endif /* CONFIG_SQLITE */ int radius_server_dac_request(struct radius_server_data *data, const char *req) { #ifdef CONFIG_SQLITE char *sql; int res; int disconnect; const char *pos = req; u8 addr[ETH_ALEN]; char addrtxt[3 * ETH_ALEN]; int t_c_clear = 0; struct db_session_fields fields; struct sockaddr_in das; struct radius_client *client; struct radius_msg *msg; struct wpabuf *buf; u8 identifier; struct os_time now; if (!data) return -1; /* req: [t_c_clear] */ if (os_strncmp(pos, "disconnect ", 11) == 0) { disconnect = 1; pos += 11; } else if (os_strncmp(req, "coa ", 4) == 0) { disconnect = 0; pos += 4; } else { return -1; } if (hwaddr_aton(pos, addr)) return -1; pos = os_strchr(pos, ' '); if (pos) { if (os_strstr(pos, "t_c_clear")) t_c_clear = 1; } if (!disconnect && !t_c_clear) { RADIUS_ERROR("DAC request for CoA without any authorization change"); return -1; } if (!data->db) { RADIUS_ERROR("SQLite database not in use"); return -1; } os_snprintf(addrtxt, sizeof(addrtxt), MACSTR, MAC2STR(addr)); sql = sqlite3_mprintf("SELECT * FROM current_sessions WHERE mac_addr=%Q", addrtxt); if (!sql) return -1; os_memset(&fields, 0, sizeof(fields)); res = sqlite3_exec(data->db, sql, get_db_session_fields, &fields, NULL); sqlite3_free(sql); if (res != SQLITE_OK) { RADIUS_ERROR("Failed to find matching current_sessions entry from sqlite database: %s", sqlite3_errmsg(data->db)); free_db_session_fields(&fields); return -1; } if (!fields.nas) { RADIUS_ERROR("No NAS information found from current_sessions"); free_db_session_fields(&fields); return -1; } os_memset(&das, 0, sizeof(das)); das.sin_family = AF_INET; das.sin_addr.s_addr = inet_addr(fields.nas); das.sin_port = htons(3799); free_db_session_fields(&fields); client = radius_server_get_client(data, &das.sin_addr, 0); if (!client) { RADIUS_ERROR("No NAS information available to protect the packet"); return -1; } identifier = client->next_dac_identifier++; msg = radius_msg_new(disconnect ? RADIUS_CODE_DISCONNECT_REQUEST : RADIUS_CODE_COA_REQUEST, identifier); if (!msg) return -1; os_snprintf(addrtxt, sizeof(addrtxt), RADIUS_802_1X_ADDR_FORMAT, MAC2STR(addr)); if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID, (u8 *) addrtxt, os_strlen(addrtxt))) { RADIUS_ERROR("Could not add Calling-Station-Id"); radius_msg_free(msg); return -1; } if (!disconnect && t_c_clear) { u8 val[4] = { 0x00, 0x00, 0x00, 0x00 }; /* E=0 */ if (!radius_msg_add_wfa( msg, RADIUS_VENDOR_ATTR_WFA_HS20_T_C_FILTERING, val, sizeof(val))) { RADIUS_DEBUG("Failed to add WFA-HS20-T-C-Filtering"); radius_msg_free(msg); return -1; } } os_get_time(&now); if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP, now.sec)) { RADIUS_ERROR("Failed to add Event-Timestamp attribute"); radius_msg_free(msg); return -1; } radius_msg_finish_acct(msg, (u8 *) client->shared_secret, client->shared_secret_len); if (wpa_debug_level <= MSG_MSGDUMP) radius_msg_dump(msg); buf = radius_msg_get_buf(msg); if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0, (struct sockaddr *) &das, sizeof(das)) < 0) { RADIUS_ERROR("Failed to send packet - sendto: %s", strerror(errno)); radius_msg_free(msg); return -1; } if (disconnect) { radius_msg_free(client->pending_dac_disconnect_req); client->pending_dac_disconnect_req = msg; client->pending_dac_disconnect_id = identifier; os_memcpy(client->pending_dac_disconnect_addr, addr, ETH_ALEN); } else { radius_msg_free(client->pending_dac_coa_req); client->pending_dac_coa_req = msg; client->pending_dac_coa_id = identifier; os_memcpy(client->pending_dac_coa_addr, addr, ETH_ALEN); } return 0; #else /* CONFIG_SQLITE */ return -1; #endif /* CONFIG_SQLITE */ }