442 lines
11 KiB
C
442 lines
11 KiB
C
/*
|
|
* Host AP (software wireless LAN access point) user space daemon for
|
|
* Host AP kernel driver / Accounting
|
|
* Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of BSD
|
|
* license.
|
|
*
|
|
* See README and COPYING for more details.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <netinet/in.h>
|
|
#include <string.h>
|
|
#include <sys/ioctl.h>
|
|
#include <signal.h>
|
|
#include <assert.h>
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
|
|
|
|
#include "hostapd.h"
|
|
#include "radius.h"
|
|
#include "radius_client.h"
|
|
#include "eloop.h"
|
|
#include "accounting.h"
|
|
#include "ieee802_1x.h"
|
|
#include "driver.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 struct radius_msg * accounting_msg(hostapd *hapd, struct sta_info *sta,
|
|
int status_type)
|
|
{
|
|
struct radius_msg *msg;
|
|
char buf[128];
|
|
u8 *val;
|
|
size_t len;
|
|
|
|
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));
|
|
|
|
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, 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 (!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) {
|
|
val = ieee802_1x_get_identity(sta->eapol_sm, &len);
|
|
if (!val) {
|
|
snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
|
|
MAC2STR(sta->addr));
|
|
val = (u8 *) buf;
|
|
len = strlen(buf);
|
|
}
|
|
|
|
if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val,
|
|
len)) {
|
|
printf("Could not add User-Name\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
|
|
(u8 *) &hapd->conf->own_ip_addr, 4)) {
|
|
printf("Could not add NAS-IP-Address\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (hapd->conf->nas_identifier &&
|
|
!radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
|
|
(u8 *) hapd->conf->nas_identifier,
|
|
strlen(hapd->conf->nas_identifier))) {
|
|
printf("Could not add NAS-Identifier\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (sta &&
|
|
!radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
|
|
printf("Could not add NAS-Port\n");
|
|
goto fail;
|
|
}
|
|
|
|
snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
|
|
MAC2STR(hapd->own_addr), hapd->conf->ssid);
|
|
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
|
|
(u8 *) buf, strlen(buf))) {
|
|
printf("Could not add Called-Station-Id\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (sta) {
|
|
snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
|
|
MAC2STR(sta->addr));
|
|
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
|
|
(u8 *) buf, strlen(buf))) {
|
|
printf("Could not add Calling-Station-Id\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (!radius_msg_add_attr_int32(
|
|
msg, RADIUS_ATTR_NAS_PORT_TYPE,
|
|
RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
|
|
printf("Could not add NAS-Port-Type\n");
|
|
goto fail;
|
|
}
|
|
|
|
snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b");
|
|
if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
|
|
(u8 *) buf, strlen(buf))) {
|
|
printf("Could not add Connect-Info\n");
|
|
goto fail;
|
|
}
|
|
|
|
val = ieee802_1x_get_radius_class(sta->eapol_sm, &len);
|
|
if (val &&
|
|
!radius_msg_add_attr(msg, RADIUS_ATTR_CLASS, val, len)) {
|
|
printf("Could not add Class\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
return msg;
|
|
|
|
fail:
|
|
radius_msg_free(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_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)
|
|
{
|
|
hostapd *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);
|
|
}
|
|
|
|
|
|
void accounting_sta_start(hostapd *hapd, struct sta_info *sta)
|
|
{
|
|
struct radius_msg *msg;
|
|
int interval;
|
|
|
|
if (sta->acct_session_started)
|
|
return;
|
|
|
|
time(&sta->acct_session_start);
|
|
sta->last_rx_bytes = sta->last_tx_bytes = 0;
|
|
sta->acct_input_gigawords = sta->acct_output_gigawords = 0;
|
|
hostapd_sta_clear_stats(hapd, sta->addr);
|
|
|
|
if (!hapd->conf->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);
|
|
|
|
sta->acct_session_started = 1;
|
|
}
|
|
|
|
|
|
void accounting_sta_report(hostapd *hapd, struct sta_info *sta, int stop)
|
|
{
|
|
struct radius_msg *msg;
|
|
int cause = sta->acct_terminate_cause;
|
|
struct hostap_sta_driver_data data;
|
|
u32 gigawords;
|
|
|
|
if (!hapd->conf->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;
|
|
}
|
|
|
|
if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_SESSION_TIME,
|
|
time(NULL) - 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,
|
|
time(NULL))) {
|
|
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;
|
|
}
|
|
|
|
radius_client_send(hapd->radius, msg,
|
|
stop ? RADIUS_ACCT : RADIUS_ACCT_INTERIM,
|
|
sta->addr);
|
|
return;
|
|
|
|
fail:
|
|
radius_msg_free(msg);
|
|
free(msg);
|
|
}
|
|
|
|
|
|
void accounting_sta_interim(hostapd *hapd, struct sta_info *sta)
|
|
{
|
|
if (sta->acct_session_started)
|
|
accounting_sta_report(hapd, sta, 0);
|
|
}
|
|
|
|
|
|
void accounting_sta_stop(hostapd *hapd, struct sta_info *sta)
|
|
{
|
|
if (sta->acct_session_started) {
|
|
accounting_sta_report(hapd, sta, 1);
|
|
eloop_cancel_timeout(accounting_interim_update, hapd, sta);
|
|
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;
|
|
}
|
|
|
|
|
|
/* Process the RADIUS frames from Accounting Server */
|
|
static RadiusRxResult
|
|
accounting_receive(struct radius_msg *msg, struct radius_msg *req,
|
|
u8 *shared_secret, size_t shared_secret_len, void *data)
|
|
{
|
|
if (msg->hdr->code != RADIUS_CODE_ACCOUNTING_RESPONSE) {
|
|
printf("Unknown RADIUS message code\n");
|
|
return RADIUS_RX_UNKNOWN;
|
|
}
|
|
|
|
if (radius_msg_verify_acct(msg, shared_secret, shared_secret_len, req))
|
|
{
|
|
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->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);
|
|
free(msg);
|
|
return;
|
|
}
|
|
|
|
radius_client_send(hapd->radius, msg, RADIUS_ACCT, NULL);
|
|
}
|
|
|
|
|
|
int accounting_init(hostapd *hapd)
|
|
{
|
|
/* Acct-Session-Id should be unique over reboots. If reliable clock is
|
|
* not available, this could be replaced with reboot counter, etc. */
|
|
hapd->acct_session_id_hi = time(NULL);
|
|
|
|
if (radius_client_register(hapd->radius, RADIUS_ACCT,
|
|
accounting_receive, hapd))
|
|
return -1;
|
|
|
|
accounting_report_state(hapd, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void accounting_deinit(hostapd *hapd)
|
|
{
|
|
accounting_report_state(hapd, 0);
|
|
}
|