git.maemo.org Git - wpasupplicant/blob - hostapd/accounting.c

   1 /*
   2  * hostapd / RADIUS Accounting
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "hostapd.h"
  18 #include "radius/radius.h"
  19 #include "radius/radius_client.h"
  20 #include "eloop.h"
  21 #include "accounting.h"
  22 #include "ieee802_1x.h"
  23 #include "driver_i.h"
  24 #include "sta_info.h"
  25
  26
  27 /* Default interval in seconds for polling TX/RX octets from the driver if
  28  * STA is not using interim accounting. This detects wrap arounds for
  29  * input/output octets and updates Acct-{Input,Output}-Gigawords. */
  30 #define ACCT_DEFAULT_UPDATE_INTERVAL 300
  31
  32 static void accounting_sta_get_id(struct hostapd_data *hapd,
  33                                   struct sta_info *sta);
  34
  35
  36 static struct radius_msg * accounting_msg(struct hostapd_data *hapd,
  37                                           struct sta_info *sta,
  38                                           int status_type)
  39 {
  40         struct radius_msg *msg;
  41         char buf[128];
  42         u8 *val;
  43         size_t len;
  44         int i;
  45
  46         msg = radius_msg_new(RADIUS_CODE_ACCOUNTING_REQUEST,
  47                              radius_client_get_id(hapd->radius));
  48         if (msg == NULL) {
  49                 printf("Could not create net RADIUS packet\n");
  50                 return NULL;
  51         }
  52
  53         if (sta) {
  54                 radius_msg_make_authenticator(msg, (u8 *) sta, sizeof(*sta));
  55
  56                 os_snprintf(buf, sizeof(buf), "%08X-%08X",
  57                             sta->acct_session_id_hi, sta->acct_session_id_lo);
  58                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_ACCT_SESSION_ID,
  59                                          (u8 *) buf, os_strlen(buf))) {
  60                         printf("Could not add Acct-Session-Id\n");
  61                         goto fail;
  62                 }
  63         } else {
  64                 radius_msg_make_authenticator(msg, (u8 *) hapd, sizeof(*hapd));
  65         }
  66
  67         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_STATUS_TYPE,
  68                                        status_type)) {
  69                 printf("Could not add Acct-Status-Type\n");
  70                 goto fail;
  71         }
  72
  73         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_AUTHENTIC,
  74                                        hapd->conf->ieee802_1x ?
  75                                        RADIUS_ACCT_AUTHENTIC_RADIUS :
  76                                        RADIUS_ACCT_AUTHENTIC_LOCAL)) {
  77                 printf("Could not add Acct-Authentic\n");
  78                 goto fail;
  79         }
  80
  81         if (sta) {
  82                 val = ieee802_1x_get_identity(sta->eapol_sm, &len);
  83                 if (!val) {
  84                         os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT,
  85                                     MAC2STR(sta->addr));
  86                         val = (u8 *) buf;
  87                         len = os_strlen(buf);
  88                 }
  89
  90                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, val,
  91                                          len)) {
  92                         printf("Could not add User-Name\n");
  93                         goto fail;
  94                 }
  95         }
  96
  97         if (hapd->conf->own_ip_addr.af == AF_INET &&
  98             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IP_ADDRESS,
  99                                  (u8 *) &hapd->conf->own_ip_addr.u.v4, 4)) {
 100                 printf("Could not add NAS-IP-Address\n");
 101                 goto fail;
 102         }
 103
 104 #ifdef CONFIG_IPV6
 105         if (hapd->conf->own_ip_addr.af == AF_INET6 &&
 106             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IPV6_ADDRESS,
 107                                  (u8 *) &hapd->conf->own_ip_addr.u.v6, 16)) {
 108                 printf("Could not add NAS-IPv6-Address\n");
 109                 goto fail;
 110         }
 111 #endif /* CONFIG_IPV6 */
 112
 113         if (hapd->conf->nas_identifier &&
 114             !radius_msg_add_attr(msg, RADIUS_ATTR_NAS_IDENTIFIER,
 115                                  (u8 *) hapd->conf->nas_identifier,
 116                                  os_strlen(hapd->conf->nas_identifier))) {
 117                 printf("Could not add NAS-Identifier\n");
 118                 goto fail;
 119         }
 120
 121         if (sta &&
 122             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_NAS_PORT, sta->aid)) {
 123                 printf("Could not add NAS-Port\n");
 124                 goto fail;
 125         }
 126
 127         os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT ":%s",
 128                     MAC2STR(hapd->own_addr), hapd->conf->ssid.ssid);
 129         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLED_STATION_ID,
 130                                  (u8 *) buf, os_strlen(buf))) {
 131                 printf("Could not add Called-Station-Id\n");
 132                 goto fail;
 133         }
 134
 135         if (sta) {
 136                 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT,
 137                             MAC2STR(sta->addr));
 138                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID,
 139                                          (u8 *) buf, os_strlen(buf))) {
 140                         printf("Could not add Calling-Station-Id\n");
 141                         goto fail;
 142                 }
 143
 144                 if (!radius_msg_add_attr_int32(
 145                             msg, RADIUS_ATTR_NAS_PORT_TYPE,
 146                             RADIUS_NAS_PORT_TYPE_IEEE_802_11)) {
 147                         printf("Could not add NAS-Port-Type\n");
 148                         goto fail;
 149                 }
 150
 151                 os_snprintf(buf, sizeof(buf), "CONNECT %d%sMbps %s",
 152                             radius_sta_rate(hapd, sta) / 2,
 153                             (radius_sta_rate(hapd, sta) & 1) ? ".5" : "",
 154                             radius_mode_txt(hapd));
 155                 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO,
 156                                          (u8 *) buf, os_strlen(buf))) {
 157                         printf("Could not add Connect-Info\n");
 158                         goto fail;
 159                 }
 160
 161                 for (i = 0; ; i++) {
 162                         val = ieee802_1x_get_radius_class(sta->eapol_sm, &len,
 163                                                           i);
 164                         if (val == NULL)
 165                                 break;
 166
 167                         if (!radius_msg_add_attr(msg, RADIUS_ATTR_CLASS,
 168                                                  val, len)) {
 169                                 printf("Could not add Class\n");
 170                                 goto fail;
 171                         }
 172                 }
 173         }
 174
 175         return msg;
 176
 177  fail:
 178         radius_msg_free(msg);
 179         os_free(msg);
 180         return NULL;
 181 }
 182
 183
 184 static int accounting_sta_update_stats(struct hostapd_data *hapd,
 185                                        struct sta_info *sta,
 186                                        struct hostap_sta_driver_data *data)
 187 {
 188         if (hostapd_read_sta_data(hapd, data, sta->addr))
 189                 return -1;
 190
 191         if (sta->last_rx_bytes > data->rx_bytes)
 192                 sta->acct_input_gigawords++;
 193         if (sta->last_tx_bytes > data->tx_bytes)
 194                 sta->acct_output_gigawords++;
 195         sta->last_rx_bytes = data->rx_bytes;
 196         sta->last_tx_bytes = data->tx_bytes;
 197
 198         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 199                        HOSTAPD_LEVEL_DEBUG, "updated TX/RX stats: "
 200                        "Acct-Input-Octets=%lu Acct-Input-Gigawords=%u "
 201                        "Acct-Output-Octets=%lu Acct-Output-Gigawords=%u",
 202                        sta->last_rx_bytes, sta->acct_input_gigawords,
 203                        sta->last_tx_bytes, sta->acct_output_gigawords);
 204
 205         return 0;
 206 }
 207
 208
 209 static void accounting_interim_update(void *eloop_ctx, void *timeout_ctx)
 210 {
 211         struct hostapd_data *hapd = eloop_ctx;
 212         struct sta_info *sta = timeout_ctx;
 213         int interval;
 214
 215         if (sta->acct_interim_interval) {
 216                 accounting_sta_interim(hapd, sta);
 217                 interval = sta->acct_interim_interval;
 218         } else {
 219                 struct hostap_sta_driver_data data;
 220                 accounting_sta_update_stats(hapd, sta, &data);
 221                 interval = ACCT_DEFAULT_UPDATE_INTERVAL;
 222         }
 223
 224         eloop_register_timeout(interval, 0, accounting_interim_update,
 225                                hapd, sta);
 226 }
 227
 228
 229 /**
 230  * accounting_sta_start - Start STA accounting
 231  * @hapd: hostapd BSS data
 232  * @sta: The station
 233  */
 234 void accounting_sta_start(struct hostapd_data *hapd, struct sta_info *sta)
 235 {
 236         struct radius_msg *msg;
 237         int interval;
 238
 239         if (sta->acct_session_started)
 240                 return;
 241
 242         accounting_sta_get_id(hapd, sta);
 243         hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 244                        HOSTAPD_LEVEL_INFO,
 245                        "starting accounting session %08X-%08X",
 246                        sta->acct_session_id_hi, sta->acct_session_id_lo);
 247
 248         time(&sta->acct_session_start);
 249         sta->last_rx_bytes = sta->last_tx_bytes = 0;
 250         sta->acct_input_gigawords = sta->acct_output_gigawords = 0;
 251         hostapd_sta_clear_stats(hapd, sta->addr);
 252
 253         if (!hapd->conf->radius->acct_server)
 254                 return;
 255
 256         if (sta->acct_interim_interval)
 257                 interval = sta->acct_interim_interval;
 258         else
 259                 interval = ACCT_DEFAULT_UPDATE_INTERVAL;
 260         eloop_register_timeout(interval, 0, accounting_interim_update,
 261                                hapd, sta);
 262
 263         msg = accounting_msg(hapd, sta, RADIUS_ACCT_STATUS_TYPE_START);
 264         if (msg)
 265                 radius_client_send(hapd->radius, msg, RADIUS_ACCT, sta->addr);
 266
 267         sta->acct_session_started = 1;
 268 }
 269
 270
 271 static void accounting_sta_report(struct hostapd_data *hapd,
 272                                   struct sta_info *sta, int stop)
 273 {
 274         struct radius_msg *msg;
 275         int cause = sta->acct_terminate_cause;
 276         struct hostap_sta_driver_data data;
 277         u32 gigawords;
 278
 279         if (!hapd->conf->radius->acct_server)
 280                 return;
 281
 282         msg = accounting_msg(hapd, sta,
 283                              stop ? RADIUS_ACCT_STATUS_TYPE_STOP :
 284                              RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE);
 285         if (!msg) {
 286                 printf("Could not create RADIUS Accounting message\n");
 287                 return;
 288         }
 289
 290         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_SESSION_TIME,
 291                                        time(NULL) - sta->acct_session_start)) {
 292                 printf("Could not add Acct-Session-Time\n");
 293                 goto fail;
 294         }
 295
 296         if (accounting_sta_update_stats(hapd, sta, &data) == 0) {
 297                 if (!radius_msg_add_attr_int32(msg,
 298                                                RADIUS_ATTR_ACCT_INPUT_PACKETS,
 299                                                data.rx_packets)) {
 300                         printf("Could not add Acct-Input-Packets\n");
 301                         goto fail;
 302                 }
 303                 if (!radius_msg_add_attr_int32(msg,
 304                                                RADIUS_ATTR_ACCT_OUTPUT_PACKETS,
 305                                                data.tx_packets)) {
 306                         printf("Could not add Acct-Output-Packets\n");
 307                         goto fail;
 308                 }
 309                 if (!radius_msg_add_attr_int32(msg,
 310                                                RADIUS_ATTR_ACCT_INPUT_OCTETS,
 311                                                data.rx_bytes)) {
 312                         printf("Could not add Acct-Input-Octets\n");
 313                         goto fail;
 314                 }
 315                 gigawords = sta->acct_input_gigawords;
 316 #if __WORDSIZE == 64
 317                 gigawords += data.rx_bytes >> 32;
 318 #endif
 319                 if (gigawords &&
 320                     !radius_msg_add_attr_int32(
 321                             msg, RADIUS_ATTR_ACCT_INPUT_GIGAWORDS,
 322                             gigawords)) {
 323                         printf("Could not add Acct-Input-Gigawords\n");
 324                         goto fail;
 325                 }
 326                 if (!radius_msg_add_attr_int32(msg,
 327                                                RADIUS_ATTR_ACCT_OUTPUT_OCTETS,
 328                                                data.tx_bytes)) {
 329                         printf("Could not add Acct-Output-Octets\n");
 330                         goto fail;
 331                 }
 332                 gigawords = sta->acct_output_gigawords;
 333 #if __WORDSIZE == 64
 334                 gigawords += data.tx_bytes >> 32;
 335 #endif
 336                 if (gigawords &&
 337                     !radius_msg_add_attr_int32(
 338                             msg, RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS,
 339                             gigawords)) {
 340                         printf("Could not add Acct-Output-Gigawords\n");
 341                         goto fail;
 342                 }
 343         }
 344
 345         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_EVENT_TIMESTAMP,
 346                                        time(NULL))) {
 347                 printf("Could not add Event-Timestamp\n");
 348                 goto fail;
 349         }
 350
 351         if (eloop_terminated())
 352                 cause = RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT;
 353
 354         if (stop && cause &&
 355             !radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
 356                                        cause)) {
 357                 printf("Could not add Acct-Terminate-Cause\n");
 358                 goto fail;
 359         }
 360
 361         radius_client_send(hapd->radius, msg,
 362                            stop ? RADIUS_ACCT : RADIUS_ACCT_INTERIM,
 363                            sta->addr);
 364         return;
 365
 366  fail:
 367         radius_msg_free(msg);
 368         os_free(msg);
 369 }
 370
 371
 372 /**
 373  * accounting_sta_interim - Send a interim STA accounting report
 374  * @hapd: hostapd BSS data
 375  * @sta: The station
 376  */
 377 void accounting_sta_interim(struct hostapd_data *hapd, struct sta_info *sta)
 378 {
 379         if (sta->acct_session_started)
 380                 accounting_sta_report(hapd, sta, 0);
 381 }
 382
 383
 384 /**
 385  * accounting_sta_stop - Stop STA accounting
 386  * @hapd: hostapd BSS data
 387  * @sta: The station
 388  */
 389 void accounting_sta_stop(struct hostapd_data *hapd, struct sta_info *sta)
 390 {
 391         if (sta->acct_session_started) {
 392                 accounting_sta_report(hapd, sta, 1);
 393                 eloop_cancel_timeout(accounting_interim_update, hapd, sta);
 394                 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
 395                                HOSTAPD_LEVEL_INFO,
 396                                "stopped accounting session %08X-%08X",
 397                                sta->acct_session_id_hi,
 398                                sta->acct_session_id_lo);
 399                 sta->acct_session_started = 0;
 400         }
 401 }
 402
 403
 404 static void accounting_sta_get_id(struct hostapd_data *hapd,
 405                                   struct sta_info *sta)
 406 {
 407         sta->acct_session_id_lo = hapd->acct_session_id_lo++;
 408         if (hapd->acct_session_id_lo == 0) {
 409                 hapd->acct_session_id_hi++;
 410         }
 411         sta->acct_session_id_hi = hapd->acct_session_id_hi;
 412 }
 413
 414
 415 /**
 416  * accounting_receive - Process the RADIUS frames from Accounting Server
 417  * @msg: RADIUS response message
 418  * @req: RADIUS request message
 419  * @shared_secret: RADIUS shared secret
 420  * @shared_secret_len: Length of shared_secret in octets
 421  * @data: Context data (struct hostapd_data *)
 422  * Returns: Processing status
 423  */
 424 static RadiusRxResult
 425 accounting_receive(struct radius_msg *msg, struct radius_msg *req,
 426                    const u8 *shared_secret, size_t shared_secret_len,
 427                    void *data)
 428 {
 429         if (msg->hdr->code != RADIUS_CODE_ACCOUNTING_RESPONSE) {
 430                 printf("Unknown RADIUS message code\n");
 431                 return RADIUS_RX_UNKNOWN;
 432         }
 433
 434         if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 0)) {
 435                 printf("Incoming RADIUS packet did not have correct "
 436                        "Authenticator - dropped\n");
 437                 return RADIUS_RX_INVALID_AUTHENTICATOR;
 438         }
 439
 440         return RADIUS_RX_PROCESSED;
 441 }
 442
 443
 444 static void accounting_report_state(struct hostapd_data *hapd, int on)
 445 {
 446         struct radius_msg *msg;
 447
 448         if (!hapd->conf->radius->acct_server || hapd->radius == NULL)
 449                 return;
 450
 451         /* Inform RADIUS server that accounting will start/stop so that the
 452          * server can close old accounting sessions. */
 453         msg = accounting_msg(hapd, NULL,
 454                              on ? RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON :
 455                              RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF);
 456         if (!msg)
 457                 return;
 458
 459         if (!radius_msg_add_attr_int32(msg, RADIUS_ATTR_ACCT_TERMINATE_CAUSE,
 460                                        RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT))
 461         {
 462                 printf("Could not add Acct-Terminate-Cause\n");
 463                 radius_msg_free(msg);
 464                 os_free(msg);
 465                 return;
 466         }
 467
 468         radius_client_send(hapd->radius, msg, RADIUS_ACCT, NULL);
 469 }
 470
 471
 472 /**
 473  * accounting_init: Initialize accounting
 474  * @hapd: hostapd BSS data
 475  * Returns: 0 on success, -1 on failure
 476  */
 477 int accounting_init(struct hostapd_data *hapd)
 478 {
 479         /* Acct-Session-Id should be unique over reboots. If reliable clock is
 480          * not available, this could be replaced with reboot counter, etc. */
 481         hapd->acct_session_id_hi = time(NULL);
 482
 483         if (radius_client_register(hapd->radius, RADIUS_ACCT,
 484                                    accounting_receive, hapd))
 485                 return -1;
 486
 487         accounting_report_state(hapd, 1);
 488
 489         return 0;
 490 }
 491
 492
 493 /**
 494  * accounting_deinit: Deinitilize accounting
 495  * @hapd: hostapd BSS data
 496  */
 497 void accounting_deinit(struct hostapd_data *hapd)
 498 {
 499         accounting_report_state(hapd, 0);
 500 }
 501
 502
 503 int accounting_reconfig(struct hostapd_data *hapd,
 504                         struct hostapd_config *oldconf)
 505 {
 506         if (!hapd->radius_client_reconfigured)
 507                 return 0;
 508
 509         accounting_deinit(hapd);
 510         return accounting_init(hapd);
 511 }