2 * Host AP (software wireless LAN access point) user space daemon for
3 * Host AP kernel driver / Accounting
4 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Alternatively, this software may be distributed under the terms of BSD
13 * See README and COPYING for more details.
19 #include <netinet/in.h>
21 #include <sys/ioctl.h>
26 #include <sys/socket.h>
31 #include "radius_client.h"
33 #include "accounting.h"
34 #include "ieee802_1x.h"
38 /* Default interval in seconds for polling TX/RX octets from the driver if
39 * STA is not using interim accounting. This detects wrap arounds for
40 * input/output octets and updates Acct-{Input,Output}-Gigawords. */
41 #define ACCT_DEFAULT_UPDATE_INTERVAL 300
43 static struct radius_msg * accounting_msg(hostapd *hapd, struct sta_info *sta,
46 struct radius_msg *msg;
52 msg = radius_msg_new(RADIUS_CODE_ACCOUNTING_REQUEST,
53 radius_client_get_id(hapd->radius));
55 printf("Could not create net RADIUS packet\n");
60 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
62 snprintf(buf, sizeof(buf), "%08X-%08X",
63 sta->acct_session_id_hi, sta->acct_session_id_lo);
64 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
65 (u8 *) buf, strlen(buf))) {
66 printf("Could not add Acct-Session-Id\n");
70 radius_msg_make_authenticator(msg, (u8 *) hapd, sizeof(*hapd));
73 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_STATUS_TYPE,
75 printf("Could not add Acct-Status-Type\n");
79 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_AUTHENTIC,
80 hapd->conf->ieee802_1x ?
81 RADIUS_ACCT_AUTHENTIC_RADIUS :
82 RADIUS_ACCT_AUTHENTIC_LOCAL)) {
83 printf("Could not add Acct-Authentic\n");
88 val = ieee802_1x_get_identity(sta->eapol_sm, &len);
90 snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
96 if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val,
98 printf("Could not add User-Name\n");
103 if (hapd->conf->own_ip_addr.af == AF_INET &&
104 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
105 (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
106 printf("Could not add NAS-IP-Address\n");
111 if (hapd->conf->own_ip_addr.af == AF_INET6 &&
112 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
113 (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
114 printf("Could not add NAS-IPv6-Address\n");
117 #endif /* CONFIG_IPV6 */
119 if (hapd->conf->nas_identifier &&
120 !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
121 (u8 *) hapd->conf->nas_identifier,
122 strlen(hapd->conf->nas_identifier))) {
123 printf("Could not add NAS-Identifier\n");
128 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
129 printf("Could not add NAS-Port\n");
133 snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
134 MAC2STR(hapd->own_addr), hapd->conf->ssid);
135 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
136 (u8 *) buf, strlen(buf))) {
137 printf("Could not add Called-Station-Id\n");
142 snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
144 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
145 (u8 *) buf, strlen(buf))) {
146 printf("Could not add Calling-Station-Id\n");
150 if (!radius_msg_add_attr_int32(
151 msg, RADIUS_ATTR_NAS_PORT_TYPE,
152 RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
153 printf("Could not add NAS-Port-Type\n");
157 snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
158 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
159 (u8 *) buf, strlen(buf))) {
160 printf("Could not add Connect-Info\n");
165 val = ieee802_1x_get_radius_class(sta->eapol_sm, &len,
170 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CLASS,
172 printf("Could not add Class\n");
181 radius_msg_free(msg);
187 static int accounting_sta_update_stats(struct hostapd_data *hapd,
188 struct sta_info *sta,
189 struct hostap_sta_driver_data *data)
191 if (hostapd_read_sta_data(hapd, data, sta->addr))
194 if (sta->last_rx_bytes > data->rx_bytes)
195 sta->acct_input_gigawords++;
196 if (sta->last_tx_bytes > data->tx_bytes)
197 sta->acct_output_gigawords++;
198 sta->last_rx_bytes = data->rx_bytes;
199 sta->last_tx_bytes = data->tx_bytes;
201 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
202 HOSTAPD_LEVEL_DEBUG, "updated TX/RX stats: "
203 "Acct-Input-Octets=%lu Acct-Input-Gigawords=%u "
204 "Acct-Output-Octets=%lu Acct-Output-Gigawords=%u",
205 sta->last_rx_bytes, sta->acct_input_gigawords,
206 sta->last_tx_bytes, sta->acct_output_gigawords);
212 static void accounting_interim_update(void *eloop_ctx, void *timeout_ctx)
214 hostapd *hapd = eloop_ctx;
215 struct sta_info *sta = timeout_ctx;
218 if (sta->acct_interim_interval) {
219 accounting_sta_interim(hapd, sta);
220 interval = sta->acct_interim_interval;
222 struct hostap_sta_driver_data data;
223 accounting_sta_update_stats(hapd, sta, &data);
224 interval = ACCT_DEFAULT_UPDATE_INTERVAL;
227 eloop_register_timeout(interval, 0, accounting_interim_update,
232 void accounting_sta_start(hostapd *hapd, struct sta_info *sta)
234 struct radius_msg *msg;
237 if (sta->acct_session_started)
240 time(&sta->acct_session_start);
241 sta->last_rx_bytes = sta->last_tx_bytes = 0;
242 sta->acct_input_gigawords = sta->acct_output_gigawords = 0;
243 hostapd_sta_clear_stats(hapd, sta->addr);
245 if (!hapd->conf->radius->acct_server)
248 if (sta->acct_interim_interval)
249 interval = sta->acct_interim_interval;
251 interval = ACCT_DEFAULT_UPDATE_INTERVAL;
252 eloop_register_timeout(interval, 0, accounting_interim_update,
255 msg = accounting_msg(hapd, sta, RADIUS_ACCT_STATUS_TYPE_START);
257 radius_client_send(hapd->radius, msg, RADIUS_ACCT, sta->addr);
259 sta->acct_session_started = 1;
263 void accounting_sta_report(hostapd *hapd, struct sta_info *sta, int stop)
265 struct radius_msg *msg;
266 int cause = sta->acct_terminate_cause;
267 struct hostap_sta_driver_data data;
270 if (!hapd->conf->radius->acct_server)
273 msg = accounting_msg(hapd, sta,
274 stop ? RADIUS_ACCT_STATUS_TYPE_STOP :
275 RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE);
277 printf("Could not create RADIUS Accounting message\n");
281 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_SESSION_TIME,
282 time(NULL) - sta->acct_session_start)) {
283 printf("Could not add Acct-Session-Time\n");
287 if (accounting_sta_update_stats(hapd, sta, &data) == 0) {
288 if (!radius_msg_add_attr_int32(msg,
289 RADIUS_ATTR_ACCT_INPUT_PACKETS,
291 printf("Could not add Acct-Input-Packets\n");
294 if (!radius_msg_add_attr_int32(msg,
295 RADIUS_ATTR_ACCT_OUTPUT_PACKETS,
297 printf("Could not add Acct-Output-Packets\n");
300 if (!radius_msg_add_attr_int32(msg,
301 RADIUS_ATTR_ACCT_INPUT_OCTETS,
303 printf("Could not add Acct-Input-Octets\n");
306 gigawords = sta->acct_input_gigawords;
308 gigawords += data.rx_bytes >> 32;
311 !radius_msg_add_attr_int32(
312 msg, RADIUS_ATTR_ACCT_INPUT_GIGAWORDS,
314 printf("Could not add Acct-Input-Gigawords\n");
317 if (!radius_msg_add_attr_int32(msg,
318 RADIUS_ATTR_ACCT_OUTPUT_OCTETS,
320 printf("Could not add Acct-Output-Octets\n");
323 gigawords = sta->acct_output_gigawords;
325 gigawords += data.tx_bytes >> 32;
328 !radius_msg_add_attr_int32(
329 msg, RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS,
331 printf("Could not add Acct-Output-Gigawords\n");
336 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
338 printf("Could not add Event-Timestamp\n");
342 if (eloop_terminated())
343 cause = RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT;
346 !radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
348 printf("Could not add Acct-Terminate-Cause\n");
352 radius_client_send(hapd->radius, msg,
353 stop ? RADIUS_ACCT : RADIUS_ACCT_INTERIM,
358 radius_msg_free(msg);
363 void accounting_sta_interim(hostapd *hapd, struct sta_info *sta)
365 if (sta->acct_session_started)
366 accounting_sta_report(hapd, sta, 0);
370 void accounting_sta_stop(hostapd *hapd, struct sta_info *sta)
372 if (sta->acct_session_started) {
373 accounting_sta_report(hapd, sta, 1);
374 eloop_cancel_timeout(accounting_interim_update, hapd, sta);
375 sta->acct_session_started = 0;
380 void accounting_sta_get_id(struct hostapd_data *hapd, struct sta_info *sta)
382 sta->acct_session_id_lo = hapd->acct_session_id_lo++;
383 if (hapd->acct_session_id_lo == 0) {
384 hapd->acct_session_id_hi++;
386 sta->acct_session_id_hi = hapd->acct_session_id_hi;
390 /* Process the RADIUS frames from Accounting Server */
391 static RadiusRxResult
392 accounting_receive(struct radius_msg *msg, struct radius_msg *req,
393 u8 *shared_secret, size_t shared_secret_len, void *data)
395 if (msg->hdr->code != RADIUS_CODE_ACCOUNTING_RESPONSE) {
396 printf("Unknown RADIUS message code\n");
397 return RADIUS_RX_UNKNOWN;
400 if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 0)) {
401 printf("Incoming RADIUS packet did not have correct "
402 "Authenticator - dropped\n");
403 return RADIUS_RX_INVALID_AUTHENTICATOR;
406 return RADIUS_RX_PROCESSED;
410 static void accounting_report_state(struct hostapd_data *hapd, int on)
412 struct radius_msg *msg;
414 if (!hapd->conf->radius->acct_server || hapd->radius == NULL)
417 /* Inform RADIUS server that accounting will start/stop so that the
418 * server can close old accounting sessions. */
419 msg = accounting_msg(hapd, NULL,
420 on ? RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON :
421 RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF);
425 if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
426 RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT))
428 printf("Could not add Acct-Terminate-Cause\n");
429 radius_msg_free(msg);
434 radius_client_send(hapd->radius, msg, RADIUS_ACCT, NULL);
438 int accounting_init(hostapd *hapd)
440 /* Acct-Session-Id should be unique over reboots. If reliable clock is
441 * not available, this could be replaced with reboot counter, etc. */
442 hapd->acct_session_id_hi = time(NULL);
444 if (radius_client_register(hapd->radius, RADIUS_ACCT,
445 accounting_receive, hapd))
448 accounting_report_state(hapd, 1);
454 void accounting_deinit(hostapd *hapd)
456 accounting_report_state(hapd, 0);