src/ap/accounting.c - platform/external/wpa_supplicant_8 - Git at Google

 /*
  * hostapd / RADIUS Accounting
  * Copyright (c) 2002-2009, 2012, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
  */

 #include "utils/includes.h"

 #include "utils/common.h"
 #include "utils/eloop.h"
 #include "drivers/driver.h"
 #include "radius/radius.h"
 #include "radius/radius_client.h"
 #include "hostapd.h"
 #include "ieee802_1x.h"
 #include "ap_config.h"
 #include "sta_info.h"
 #include "ap_drv_ops.h"
 #include "accounting.h"


 /* Default interval in seconds for polling TX/RX octets from the driver if
  * STA is not using interim accounting. This detects wrap arounds for
  * input/output octets and updates Acct-{Input,Output}-Gigawords. */
 #define ACCT_DEFAULT_UPDATE_INTERVAL 300

 static void accounting_sta_interim(struct hostapd_data *hapd,
 				   struct sta_info *sta);


 static struct radius_msg * accounting_msg(struct hostapd_data *hapd,
 					  struct sta_info *sta,
 					  int status_type)
 {
 	struct radius_msg *msg;
 	char buf[128];
 	u8 *val;
 	size_t len;
 	int i;
 	struct wpabuf *b;

 	msg = radius_msg_new(RADIUS_CODE_ACCOUNTING_REQUEST,
 			     radius_client_get_id(hapd->radius));
 	if (msg == NULL) {
 		printf("Could not create net RADIUS packet\n");
 		return NULL;
 	}

 	if (sta) {
 		radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));

 		os_snprintf(buf, sizeof(buf), "%08X-%08X",
 			    sta->acct_session_id_hi, sta->acct_session_id_lo);
 		if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
 					 (u8 *) buf, os_strlen(buf))) {
 			printf("Could not add Acct-Session-Id\n");
 			goto fail;
 		}
 	} else {
 		radius_msg_make_authenticator(msg, (u8 *) hapd, sizeof(*hapd));
 	}

 	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_STATUS_TYPE,
 				       status_type)) {
 		printf("Could not add Acct-Status-Type\n");
 		goto fail;
 	}

 	if (!hostapd_config_get_radius_attr(hapd->conf->radius_acct_req_attr,
 					    RADIUS_ATTR_ACCT_AUTHENTIC) &&
 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_AUTHENTIC,
 				       hapd->conf->ieee802_1x ?
 				       RADIUS_ACCT_AUTHENTIC_RADIUS :
 				       RADIUS_ACCT_AUTHENTIC_LOCAL)) {
 		printf("Could not add Acct-Authentic\n");
 		goto fail;
 	}

 	if (sta) {
 		/* Use 802.1X identity if available */
 		val = ieee802_1x_get_identity(sta->eapol_sm, &len);

 		/* Use RADIUS ACL identity if 802.1X provides no identity */
 		if (!val && sta->identity) {
 			val = (u8 *) sta->identity;
 			len = os_strlen(sta->identity);
 		}

 		/* Use STA MAC if neither 802.1X nor RADIUS ACL provided
 		 * identity */
 		if (!val) {
 			os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
 				    MAC2STR(sta->addr));
 			val = (u8 *) buf;
 			len = os_strlen(buf);
 		}

 		if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val,
 					 len)) {
 			printf("Could not add User-Name\n");
 			goto fail;
 		}
 	}

 	if (add_common_radius_attr(hapd, hapd->conf->radius_acct_req_attr, sta,
 				   msg) < 0)
 		goto fail;

 	if (sta) {
 		for (i = 0; ; i++) {
 			val = ieee802_1x_get_radius_class(sta->eapol_sm, &len,
 							  i);
 			if (val == NULL)
 				break;

 			if (!radius_msg_add_attr(msg, RADIUS_ATTR_CLASS,
 						 val, len)) {
 				printf("Could not add Class\n");
 				goto fail;
 			}
 		}

 		b = ieee802_1x_get_radius_cui(sta->eapol_sm);
 		if (b &&
 		    !radius_msg_add_attr(msg,
 					 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 					 wpabuf_head(b), wpabuf_len(b))) {
 			wpa_printf(MSG_ERROR, "Could not add CUI");
 			goto fail;
 		}

 		if (!b && sta->radius_cui &&
 		    !radius_msg_add_attr(msg,
 					 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
 					 (u8 *) sta->radius_cui,
 					 os_strlen(sta->radius_cui))) {
 			wpa_printf(MSG_ERROR, "Could not add CUI from ACL");
 			goto fail;
 		}
 	}

 	return msg;

  fail:
 	radius_msg_free(msg);
 	return NULL;
 }


 static int accounting_sta_update_stats(struct hostapd_data *hapd,
 				       struct sta_info *sta,
 				       struct hostap_sta_driver_data *data)
 {
 	if (hostapd_drv_read_sta_data(hapd, data, sta->addr))
 		return -1;

 	if (sta->last_rx_bytes > data->rx_bytes)
 		sta->acct_input_gigawords++;
 	if (sta->last_tx_bytes > data->tx_bytes)
 		sta->acct_output_gigawords++;
 	sta->last_rx_bytes = data->rx_bytes;
 	sta->last_tx_bytes = data->tx_bytes;

 	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 		       HOSTAPD_LEVEL_DEBUG, "updated TX/RX stats: "
 		       "Acct-Input-Octets=%lu Acct-Input-Gigawords=%u "
 		       "Acct-Output-Octets=%lu Acct-Output-Gigawords=%u",
 		       sta->last_rx_bytes, sta->acct_input_gigawords,
 		       sta->last_tx_bytes, sta->acct_output_gigawords);

 	return 0;
 }


 static void accounting_interim_update(void *eloop_ctx, void *timeout_ctx)
 {
 	struct hostapd_data *hapd = eloop_ctx;
 	struct sta_info *sta = timeout_ctx;
 	int interval;

 	if (sta->acct_interim_interval) {
 		accounting_sta_interim(hapd, sta);
 		interval = sta->acct_interim_interval;
 	} else {
 		struct hostap_sta_driver_data data;
 		accounting_sta_update_stats(hapd, sta, &data);
 		interval = ACCT_DEFAULT_UPDATE_INTERVAL;
 	}

 	eloop_register_timeout(interval, 0, accounting_interim_update,
 			       hapd, sta);
 }


 /**
  * accounting_sta_start - Start STA accounting
  * @hapd: hostapd BSS data
  * @sta: The station
  */
 void accounting_sta_start(struct hostapd_data *hapd, struct sta_info *sta)
 {
 	struct radius_msg *msg;
 	struct os_time t;
 	int interval;

 	if (sta->acct_session_started)
 		return;

 	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 		       HOSTAPD_LEVEL_INFO,
 		       "starting accounting session %08X-%08X",
 		       sta->acct_session_id_hi, sta->acct_session_id_lo);

 	os_get_time(&t);
 	sta->acct_session_start = t.sec;
 	sta->last_rx_bytes = sta->last_tx_bytes = 0;
 	sta->acct_input_gigawords = sta->acct_output_gigawords = 0;
 	hostapd_drv_sta_clear_stats(hapd, sta->addr);

 	if (!hapd->conf->radius->acct_server)
 		return;

 	if (sta->acct_interim_interval)
 		interval = sta->acct_interim_interval;
 	else
 		interval = ACCT_DEFAULT_UPDATE_INTERVAL;
 	eloop_register_timeout(interval, 0, accounting_interim_update,
 			       hapd, sta);

 	msg = accounting_msg(hapd, sta, RADIUS_ACCT_STATUS_TYPE_START);
 	if (msg &&
 	    radius_client_send(hapd->radius, msg, RADIUS_ACCT, sta->addr) < 0)
 		radius_msg_free(msg);

 	sta->acct_session_started = 1;
 }


 static void accounting_sta_report(struct hostapd_data *hapd,
 				  struct sta_info *sta, int stop)
 {
 	struct radius_msg *msg;
 	int cause = sta->acct_terminate_cause;
 	struct hostap_sta_driver_data data;
 	struct os_time now;
 	u32 gigawords;

 	if (!hapd->conf->radius->acct_server)
 		return;

 	msg = accounting_msg(hapd, sta,
 			     stop ? RADIUS_ACCT_STATUS_TYPE_STOP :
 			     RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE);
 	if (!msg) {
 		printf("Could not create RADIUS Accounting message\n");
 		return;
 	}

 	os_get_time(&now);
 	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_SESSION_TIME,
 				       now.sec - sta->acct_session_start)) {
 		printf("Could not add Acct-Session-Time\n");
 		goto fail;
 	}

 	if (accounting_sta_update_stats(hapd, sta, &data) == 0) {
 		if (!radius_msg_add_attr_int32(msg,
 					       RADIUS_ATTR_ACCT_INPUT_PACKETS,
 					       data.rx_packets)) {
 			printf("Could not add Acct-Input-Packets\n");
 			goto fail;
 		}
 		if (!radius_msg_add_attr_int32(msg,
 					       RADIUS_ATTR_ACCT_OUTPUT_PACKETS,
 					       data.tx_packets)) {
 			printf("Could not add Acct-Output-Packets\n");
 			goto fail;
 		}
 		if (!radius_msg_add_attr_int32(msg,
 					       RADIUS_ATTR_ACCT_INPUT_OCTETS,
 					       data.rx_bytes)) {
 			printf("Could not add Acct-Input-Octets\n");
 			goto fail;
 		}
 		gigawords = sta->acct_input_gigawords;
 #if __WORDSIZE == 64
 		gigawords += data.rx_bytes >> 32;
 #endif
 		if (gigawords &&
 		    !radius_msg_add_attr_int32(
 			    msg, RADIUS_ATTR_ACCT_INPUT_GIGAWORDS,
 			    gigawords)) {
 			printf("Could not add Acct-Input-Gigawords\n");
 			goto fail;
 		}
 		if (!radius_msg_add_attr_int32(msg,
 					       RADIUS_ATTR_ACCT_OUTPUT_OCTETS,
 					       data.tx_bytes)) {
 			printf("Could not add Acct-Output-Octets\n");
 			goto fail;
 		}
 		gigawords = sta->acct_output_gigawords;
 #if __WORDSIZE == 64
 		gigawords += data.tx_bytes >> 32;
 #endif
 		if (gigawords &&
 		    !radius_msg_add_attr_int32(
 			    msg, RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS,
 			    gigawords)) {
 			printf("Could not add Acct-Output-Gigawords\n");
 			goto fail;
 		}
 	}

 	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
 				       now.sec)) {
 		printf("Could not add Event-Timestamp\n");
 		goto fail;
 	}

 	if (eloop_terminated())
 		cause = RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT;

 	if (stop && cause &&
 	    !radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
 				       cause)) {
 		printf("Could not add Acct-Terminate-Cause\n");
 		goto fail;
 	}

 	if (radius_client_send(hapd->radius, msg,
 			       stop ? RADIUS_ACCT : RADIUS_ACCT_INTERIM,
 			       sta->addr) < 0)
 		goto fail;
 	return;

  fail:
 	radius_msg_free(msg);
 }


 /**
  * accounting_sta_interim - Send a interim STA accounting report
  * @hapd: hostapd BSS data
  * @sta: The station
  */
 static void accounting_sta_interim(struct hostapd_data *hapd,
 				   struct sta_info *sta)
 {
 	if (sta->acct_session_started)
 		accounting_sta_report(hapd, sta, 0);
 }


 /**
  * accounting_sta_stop - Stop STA accounting
  * @hapd: hostapd BSS data
  * @sta: The station
  */
 void accounting_sta_stop(struct hostapd_data *hapd, struct sta_info *sta)
 {
 	if (sta->acct_session_started) {
 		accounting_sta_report(hapd, sta, 1);
 		eloop_cancel_timeout(accounting_interim_update, hapd, sta);
 		hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 			       HOSTAPD_LEVEL_INFO,
 			       "stopped accounting session %08X-%08X",
 			       sta->acct_session_id_hi,
 			       sta->acct_session_id_lo);
 		sta->acct_session_started = 0;
 	}
 }


 void accounting_sta_get_id(struct hostapd_data *hapd,
 				  struct sta_info *sta)
 {
 	sta->acct_session_id_lo = hapd->acct_session_id_lo++;
 	if (hapd->acct_session_id_lo == 0) {
 		hapd->acct_session_id_hi++;
 	}
 	sta->acct_session_id_hi = hapd->acct_session_id_hi;
 }


 /**
  * accounting_receive - Process the RADIUS frames from Accounting Server
  * @msg: RADIUS response message
  * @req: RADIUS request message
  * @shared_secret: RADIUS shared secret
  * @shared_secret_len: Length of shared_secret in octets
  * @data: Context data (struct hostapd_data *)
  * Returns: Processing status
  */
 static RadiusRxResult
 accounting_receive(struct radius_msg *msg, struct radius_msg *req,
 		   const u8 *shared_secret, size_t shared_secret_len,
 		   void *data)
 {
 	if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCOUNTING_RESPONSE) {
 		printf("Unknown RADIUS message code\n");
 		return RADIUS_RX_UNKNOWN;
 	}

 	if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 0)) {
 		printf("Incoming RADIUS packet did not have correct "
 		       "Authenticator - dropped\n");
 		return RADIUS_RX_INVALID_AUTHENTICATOR;
 	}

 	return RADIUS_RX_PROCESSED;
 }


 static void accounting_report_state(struct hostapd_data *hapd, int on)
 {
 	struct radius_msg *msg;

 	if (!hapd->conf->radius->acct_server || hapd->radius == NULL)
 		return;

 	/* Inform RADIUS server that accounting will start/stop so that the
 	 * server can close old accounting sessions. */
 	msg = accounting_msg(hapd, NULL,
 			     on ? RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON :
 			     RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF);
 	if (!msg)
 		return;

 	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
 				       RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT))
 	{
 		printf("Could not add Acct-Terminate-Cause\n");
 		radius_msg_free(msg);
 		return;
 	}

 	if (radius_client_send(hapd->radius, msg, RADIUS_ACCT, NULL) < 0)
 		radius_msg_free(msg);
 }


 /**
  * accounting_init: Initialize accounting
  * @hapd: hostapd BSS data
  * Returns: 0 on success, -1 on failure
  */
 int accounting_init(struct hostapd_data *hapd)
 {
 	struct os_time now;

 	/* Acct-Session-Id should be unique over reboots. If reliable clock is
 	 * not available, this could be replaced with reboot counter, etc. */
 	os_get_time(&now);
 	hapd->acct_session_id_hi = now.sec;

 	if (radius_client_register(hapd->radius, RADIUS_ACCT,
 				   accounting_receive, hapd))
 		return -1;

 	accounting_report_state(hapd, 1);

 	return 0;
 }


 /**
  * accounting_deinit: Deinitilize accounting
  * @hapd: hostapd BSS data
  */
 void accounting_deinit(struct hostapd_data *hapd)
 {
 	accounting_report_state(hapd, 0);
 }
	/*
	* hostapd / RADIUS Accounting
	* Copyright (c) 2002-2009, 2012, Jouni Malinen <j@w1.fi>
	*
	* This software may be distributed under the terms of the BSD license.
	* See README for more details.
	*/

	#include "utils/includes.h"

	#include "utils/common.h"
	#include "utils/eloop.h"
	#include "drivers/driver.h"
	#include "radius/radius.h"
	#include "radius/radius_client.h"
	#include "hostapd.h"
	#include "ieee802_1x.h"
	#include "ap_config.h"
	#include "sta_info.h"
	#include "ap_drv_ops.h"
	#include "accounting.h"


	/* Default interval in seconds for polling TX/RX octets from the driver if
	* STA is not using interim accounting. This detects wrap arounds for
	* input/output octets and updates Acct-{Input,Output}-Gigawords. */
	#define ACCT_DEFAULT_UPDATE_INTERVAL 300

	static void accounting_sta_interim(struct hostapd_data *hapd,
	struct sta_info *sta);


	static struct radius_msg * accounting_msg(struct hostapd_data *hapd,
	struct sta_info *sta,
	int status_type)
	{
	struct radius_msg *msg;
	char buf[128];
	u8 *val;
	size_t len;
	int i;
	struct wpabuf *b;

	msg = radius_msg_new(RADIUS_CODE_ACCOUNTING_REQUEST,
	radius_client_get_id(hapd->radius));
	if (msg == NULL) {
	printf("Could not create net RADIUS packet\n");
	return NULL;
	}

	if (sta) {
	radius_msg_make_authenticator(msg, (u8 ) sta, sizeof(sta));

	os_snprintf(buf, sizeof(buf), "%08X-%08X",
	sta->acct_session_id_hi, sta->acct_session_id_lo);
	if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
	(u8 *) buf, os_strlen(buf))) {
	printf("Could not add Acct-Session-Id\n");
	goto fail;
	}
	} else {
	radius_msg_make_authenticator(msg, (u8 ) hapd, sizeof(hapd));
	}

	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_STATUS_TYPE,
	status_type)) {
	printf("Could not add Acct-Status-Type\n");
	goto fail;
	}

	if (!hostapd_config_get_radius_attr(hapd->conf->radius_acct_req_attr,
	RADIUS_ATTR_ACCT_AUTHENTIC) &&
	!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_AUTHENTIC,
	hapd->conf->ieee802_1x ?
	RADIUS_ACCT_AUTHENTIC_RADIUS :
	RADIUS_ACCT_AUTHENTIC_LOCAL)) {
	printf("Could not add Acct-Authentic\n");
	goto fail;
	}

	if (sta) {
	/* Use 802.1X identity if available */
	val = ieee802_1x_get_identity(sta->eapol_sm, &len);

	/* Use RADIUS ACL identity if 802.1X provides no identity */
	if (!val && sta->identity) {
	val = (u8 *) sta->identity;
	len = os_strlen(sta->identity);
	}

	/* Use STA MAC if neither 802.1X nor RADIUS ACL provided
	* identity */
	if (!val) {
	os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
	MAC2STR(sta->addr));
	val = (u8 *) buf;
	len = os_strlen(buf);
	}

	if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val,
	len)) {
	printf("Could not add User-Name\n");
	goto fail;
	}
	}

	if (add_common_radius_attr(hapd, hapd->conf->radius_acct_req_attr, sta,
	msg) < 0)
	goto fail;

	if (sta) {
	for (i = 0; ; i++) {
	val = ieee802_1x_get_radius_class(sta->eapol_sm, &len,
	i);
	if (val == NULL)
	break;

	if (!radius_msg_add_attr(msg, RADIUS_ATTR_CLASS,
	val, len)) {
	printf("Could not add Class\n");
	goto fail;
	}
	}

	b = ieee802_1x_get_radius_cui(sta->eapol_sm);
	if (b &&
	!radius_msg_add_attr(msg,
	RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
	wpabuf_head(b), wpabuf_len(b))) {
	wpa_printf(MSG_ERROR, "Could not add CUI");
	goto fail;
	}

	if (!b && sta->radius_cui &&
	!radius_msg_add_attr(msg,
	RADIUS_ATTR_CHARGEABLE_USER_IDENTITY,
	(u8 *) sta->radius_cui,
	os_strlen(sta->radius_cui))) {
	wpa_printf(MSG_ERROR, "Could not add CUI from ACL");
	goto fail;
	}
	}

	return msg;

	fail:
	radius_msg_free(msg);
	return NULL;
	}


	static int accounting_sta_update_stats(struct hostapd_data *hapd,
	struct sta_info *sta,
	struct hostap_sta_driver_data *data)
	{
	if (hostapd_drv_read_sta_data(hapd, data, sta->addr))
	return -1;

	if (sta->last_rx_bytes > data->rx_bytes)
	sta->acct_input_gigawords++;
	if (sta->last_tx_bytes > data->tx_bytes)
	sta->acct_output_gigawords++;
	sta->last_rx_bytes = data->rx_bytes;
	sta->last_tx_bytes = data->tx_bytes;

	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
	HOSTAPD_LEVEL_DEBUG, "updated TX/RX stats: "
	"Acct-Input-Octets=%lu Acct-Input-Gigawords=%u "
	"Acct-Output-Octets=%lu Acct-Output-Gigawords=%u",
	sta->last_rx_bytes, sta->acct_input_gigawords,
	sta->last_tx_bytes, sta->acct_output_gigawords);

	return 0;
	}


	static void accounting_interim_update(void eloop_ctx, void timeout_ctx)
	{
	struct hostapd_data *hapd = eloop_ctx;
	struct sta_info *sta = timeout_ctx;
	int interval;

	if (sta->acct_interim_interval) {
	accounting_sta_interim(hapd, sta);
	interval = sta->acct_interim_interval;
	} else {
	struct hostap_sta_driver_data data;
	accounting_sta_update_stats(hapd, sta, &data);
	interval = ACCT_DEFAULT_UPDATE_INTERVAL;
	}

	eloop_register_timeout(interval, 0, accounting_interim_update,
	hapd, sta);
	}


	/**
	* accounting_sta_start - Start STA accounting
	* @hapd: hostapd BSS data
	* @sta: The station
	*/
	void accounting_sta_start(struct hostapd_data hapd, struct sta_info sta)
	{
	struct radius_msg *msg;
	struct os_time t;
	int interval;

	if (sta->acct_session_started)
	return;

	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
	HOSTAPD_LEVEL_INFO,
	"starting accounting session %08X-%08X",
	sta->acct_session_id_hi, sta->acct_session_id_lo);

	os_get_time(&t);
	sta->acct_session_start = t.sec;
	sta->last_rx_bytes = sta->last_tx_bytes = 0;
	sta->acct_input_gigawords = sta->acct_output_gigawords = 0;
	hostapd_drv_sta_clear_stats(hapd, sta->addr);

	if (!hapd->conf->radius->acct_server)
	return;

	if (sta->acct_interim_interval)
	interval = sta->acct_interim_interval;
	else
	interval = ACCT_DEFAULT_UPDATE_INTERVAL;
	eloop_register_timeout(interval, 0, accounting_interim_update,
	hapd, sta);

	msg = accounting_msg(hapd, sta, RADIUS_ACCT_STATUS_TYPE_START);
	if (msg &&
	radius_client_send(hapd->radius, msg, RADIUS_ACCT, sta->addr) < 0)
	radius_msg_free(msg);

	sta->acct_session_started = 1;
	}


	static void accounting_sta_report(struct hostapd_data *hapd,
	struct sta_info *sta, int stop)
	{
	struct radius_msg *msg;
	int cause = sta->acct_terminate_cause;
	struct hostap_sta_driver_data data;
	struct os_time now;
	u32 gigawords;

	if (!hapd->conf->radius->acct_server)
	return;

	msg = accounting_msg(hapd, sta,
	stop ? RADIUS_ACCT_STATUS_TYPE_STOP :
	RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE);
	if (!msg) {
	printf("Could not create RADIUS Accounting message\n");
	return;
	}

	os_get_time(&now);
	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_SESSION_TIME,
	now.sec - sta->acct_session_start)) {
	printf("Could not add Acct-Session-Time\n");
	goto fail;
	}

	if (accounting_sta_update_stats(hapd, sta, &data) == 0) {
	if (!radius_msg_add_attr_int32(msg,
	RADIUS_ATTR_ACCT_INPUT_PACKETS,
	data.rx_packets)) {
	printf("Could not add Acct-Input-Packets\n");
	goto fail;
	}
	if (!radius_msg_add_attr_int32(msg,
	RADIUS_ATTR_ACCT_OUTPUT_PACKETS,
	data.tx_packets)) {
	printf("Could not add Acct-Output-Packets\n");
	goto fail;
	}
	if (!radius_msg_add_attr_int32(msg,
	RADIUS_ATTR_ACCT_INPUT_OCTETS,
	data.rx_bytes)) {
	printf("Could not add Acct-Input-Octets\n");
	goto fail;
	}
	gigawords = sta->acct_input_gigawords;
	#if __WORDSIZE == 64
	gigawords += data.rx_bytes >> 32;
	#endif
	if (gigawords &&
	!radius_msg_add_attr_int32(
	msg, RADIUS_ATTR_ACCT_INPUT_GIGAWORDS,
	gigawords)) {
	printf("Could not add Acct-Input-Gigawords\n");
	goto fail;
	}
	if (!radius_msg_add_attr_int32(msg,
	RADIUS_ATTR_ACCT_OUTPUT_OCTETS,
	data.tx_bytes)) {
	printf("Could not add Acct-Output-Octets\n");
	goto fail;
	}
	gigawords = sta->acct_output_gigawords;
	#if __WORDSIZE == 64
	gigawords += data.tx_bytes >> 32;
	#endif
	if (gigawords &&
	!radius_msg_add_attr_int32(
	msg, RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS,
	gigawords)) {
	printf("Could not add Acct-Output-Gigawords\n");
	goto fail;
	}
	}

	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
	now.sec)) {
	printf("Could not add Event-Timestamp\n");
	goto fail;
	}

	if (eloop_terminated())
	cause = RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT;

	if (stop && cause &&
	!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
	cause)) {
	printf("Could not add Acct-Terminate-Cause\n");
	goto fail;
	}

	if (radius_client_send(hapd->radius, msg,
	stop ? RADIUS_ACCT : RADIUS_ACCT_INTERIM,
	sta->addr) < 0)
	goto fail;
	return;

	fail:
	radius_msg_free(msg);
	}


	/**
	* accounting_sta_interim - Send a interim STA accounting report
	* @hapd: hostapd BSS data
	* @sta: The station
	*/
	static void accounting_sta_interim(struct hostapd_data *hapd,
	struct sta_info *sta)
	{
	if (sta->acct_session_started)
	accounting_sta_report(hapd, sta, 0);
	}


	/**
	* accounting_sta_stop - Stop STA accounting
	* @hapd: hostapd BSS data
	* @sta: The station
	*/
	void accounting_sta_stop(struct hostapd_data hapd, struct sta_info sta)
	{
	if (sta->acct_session_started) {
	accounting_sta_report(hapd, sta, 1);
	eloop_cancel_timeout(accounting_interim_update, hapd, sta);
	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
	HOSTAPD_LEVEL_INFO,
	"stopped accounting session %08X-%08X",
	sta->acct_session_id_hi,
	sta->acct_session_id_lo);
	sta->acct_session_started = 0;
	}
	}


	void accounting_sta_get_id(struct hostapd_data *hapd,
	struct sta_info *sta)
	{
	sta->acct_session_id_lo = hapd->acct_session_id_lo++;
	if (hapd->acct_session_id_lo == 0) {
	hapd->acct_session_id_hi++;
	}
	sta->acct_session_id_hi = hapd->acct_session_id_hi;
	}


	/**
	* accounting_receive - Process the RADIUS frames from Accounting Server
	* @msg: RADIUS response message
	* @req: RADIUS request message
	* @shared_secret: RADIUS shared secret
	* @shared_secret_len: Length of shared_secret in octets
	* @data: Context data (struct hostapd_data *)
	* Returns: Processing status
	*/
	static RadiusRxResult
	accounting_receive(struct radius_msg msg, struct radius_msg req,
	const u8 *shared_secret, size_t shared_secret_len,
	void *data)
	{
	if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCOUNTING_RESPONSE) {
	printf("Unknown RADIUS message code\n");
	return RADIUS_RX_UNKNOWN;
	}

	if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 0)) {
	printf("Incoming RADIUS packet did not have correct "
	"Authenticator - dropped\n");
	return RADIUS_RX_INVALID_AUTHENTICATOR;
	}

	return RADIUS_RX_PROCESSED;
	}


	static void accounting_report_state(struct hostapd_data *hapd, int on)
	{
	struct radius_msg *msg;

	if (!hapd->conf->radius->acct_server \|\| hapd->radius == NULL)
	return;

	/* Inform RADIUS server that accounting will start/stop so that the
	* server can close old accounting sessions. */
	msg = accounting_msg(hapd, NULL,
	on ? RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON :
	RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF);
	if (!msg)
	return;

	if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
	RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT))
	{
	printf("Could not add Acct-Terminate-Cause\n");
	radius_msg_free(msg);
	return;
	}

	if (radius_client_send(hapd->radius, msg, RADIUS_ACCT, NULL) < 0)
	radius_msg_free(msg);
	}


	/**
	* accounting_init: Initialize accounting
	* @hapd: hostapd BSS data
	* Returns: 0 on success, -1 on failure
	*/
	int accounting_init(struct hostapd_data *hapd)
	{
	struct os_time now;

	/* Acct-Session-Id should be unique over reboots. If reliable clock is
	* not available, this could be replaced with reboot counter, etc. */
	os_get_time(&now);
	hapd->acct_session_id_hi = now.sec;

	if (radius_client_register(hapd->radius, RADIUS_ACCT,
	accounting_receive, hapd))
	return -1;

	accounting_report_state(hapd, 1);

	return 0;
	}


	/**
	* accounting_deinit: Deinitilize accounting
	* @hapd: hostapd BSS data
	*/
	void accounting_deinit(struct hostapd_data *hapd)
	{
	accounting_report_state(hapd, 0);
	}