src/radius/radius_server.c

   1 /*
   2  * RADIUS authentication server
   3  * Copyright (c) 2005-2009, 2011, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10 #include <net/if.h>
  11
  12 #include "common.h"
  13 #include "radius.h"
  14 #include "eloop.h"
  15 #include "eap_server/eap.h"
  16 #include "radius_server.h"
  17
  18 /**
  19  * RADIUS_SESSION_TIMEOUT - Session timeout in seconds
  20  */
  21 #define RADIUS_SESSION_TIMEOUT 60
  22
  23 /**
  24  * RADIUS_MAX_SESSION - Maximum number of active sessions
  25  */
  26 #define RADIUS_MAX_SESSION 100
  27
  28 /**
  29  * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
  30  */
  31 #define RADIUS_MAX_MSG_LEN 3000
  32
  33 static struct eapol_callbacks radius_server_eapol_cb;
  34
  35 struct radius_client;
  36 struct radius_server_data;
  37
  38 /**
  39  * struct radius_server_counters - RADIUS server statistics counters
  40  */
  41 struct radius_server_counters {
  42         u32 access_requests;
  43         u32 invalid_requests;
  44         u32 dup_access_requests;
  45         u32 access_accepts;
  46         u32 access_rejects;
  47         u32 access_challenges;
  48         u32 malformed_access_requests;
  49         u32 bad_authenticators;
  50         u32 packets_dropped;
  51         u32 unknown_types;
  52 };
  53
  54 /**
  55  * struct radius_session - Internal RADIUS server data for a session
  56  */
  57 struct radius_session {
  58         struct radius_session *next;
  59         struct radius_client *client;
  60         struct radius_server_data *server;
  61         unsigned int sess_id;
  62         struct eap_sm *eap;
  63         struct eap_eapol_interface *eap_if;
  64
  65         struct radius_msg *last_msg;
  66         char *last_from_addr;
  67         int last_from_port;
  68         struct sockaddr_storage last_from;
  69         socklen_t last_fromlen;
  70         u8 last_identifier;
  71         struct radius_msg *last_reply;
  72         u8 last_authenticator[16];
  73 };
  74
  75 /**
  76  * struct radius_client - Internal RADIUS server data for a client
  77  */
  78 struct radius_client {
  79         struct radius_client *next;
  80         struct in_addr addr;
  81         struct in_addr mask;
  82 #ifdef CONFIG_IPV6
  83         struct in6_addr addr6;
  84         struct in6_addr mask6;
  85 #endif /* CONFIG_IPV6 */
  86         char *shared_secret;
  87         int shared_secret_len;
  88         struct radius_session *sessions;
  89         struct radius_server_counters counters;
  90 };
  91
  92 /**
  93  * struct radius_server_data - Internal RADIUS server data
  94  */
  95 struct radius_server_data {
  96         /**
  97          * auth_sock - Socket for RADIUS authentication messages
  98          */
  99         int auth_sock;
 100
 101         /**
 102          * clients - List of authorized RADIUS clients
 103          */
 104         struct radius_client *clients;
 105
 106         /**
 107          * next_sess_id - Next session identifier
 108          */
 109         unsigned int next_sess_id;
 110
 111         /**
 112          * conf_ctx - Context pointer for callbacks
 113          *
 114          * This is used as the ctx argument in get_eap_user() calls.
 115          */
 116         void *conf_ctx;
 117
 118         /**
 119          * num_sess - Number of active sessions
 120          */
 121         int num_sess;
 122
 123         /**
 124          * eap_sim_db_priv - EAP-SIM/AKA database context
 125          *
 126          * This is passed to the EAP-SIM/AKA server implementation as a
 127          * callback context.
 128          */
 129         void *eap_sim_db_priv;
 130
 131         /**
 132          * ssl_ctx - TLS context
 133          *
 134          * This is passed to the EAP server implementation as a callback
 135          * context for TLS operations.
 136          */
 137         void *ssl_ctx;
 138
 139         /**
 140          * pac_opaque_encr_key - PAC-Opaque encryption key for EAP-FAST
 141          *
 142          * This parameter is used to set a key for EAP-FAST to encrypt the
 143          * PAC-Opaque data. It can be set to %NULL if EAP-FAST is not used. If
 144          * set, must point to a 16-octet key.
 145          */
 146         u8 *pac_opaque_encr_key;
 147
 148         /**
 149          * eap_fast_a_id - EAP-FAST authority identity (A-ID)
 150          *
 151          * If EAP-FAST is not used, this can be set to %NULL. In theory, this
 152          * is a variable length field, but due to some existing implementations
 153          * requiring A-ID to be 16 octets in length, it is recommended to use
 154          * that length for the field to provide interoperability with deployed
 155          * peer implementations.
 156          */
 157         u8 *eap_fast_a_id;
 158
 159         /**
 160          * eap_fast_a_id_len - Length of eap_fast_a_id buffer in octets
 161          */
 162         size_t eap_fast_a_id_len;
 163
 164         /**
 165          * eap_fast_a_id_info - EAP-FAST authority identifier information
 166          *
 167          * This A-ID-Info contains a user-friendly name for the A-ID. For
 168          * example, this could be the enterprise and server names in
 169          * human-readable format. This field is encoded as UTF-8. If EAP-FAST
 170          * is not used, this can be set to %NULL.
 171          */
 172         char *eap_fast_a_id_info;
 173
 174         /**
 175          * eap_fast_prov - EAP-FAST provisioning modes
 176          *
 177          * 0 = provisioning disabled, 1 = only anonymous provisioning allowed,
 178          * 2 = only authenticated provisioning allowed, 3 = both provisioning
 179          * modes allowed.
 180          */
 181         int eap_fast_prov;
 182
 183         /**
 184          * pac_key_lifetime - EAP-FAST PAC-Key lifetime in seconds
 185          *
 186          * This is the hard limit on how long a provisioned PAC-Key can be
 187          * used.
 188          */
 189         int pac_key_lifetime;
 190
 191         /**
 192          * pac_key_refresh_time - EAP-FAST PAC-Key refresh time in seconds
 193          *
 194          * This is a soft limit on the PAC-Key. The server will automatically
 195          * generate a new PAC-Key when this number of seconds (or fewer) of the
 196          * lifetime remains.
 197          */
 198         int pac_key_refresh_time;
 199
 200         /**
 201          * eap_sim_aka_result_ind - EAP-SIM/AKA protected success indication
 202          *
 203          * This controls whether the protected success/failure indication
 204          * (AT_RESULT_IND) is used with EAP-SIM and EAP-AKA.
 205          */
 206         int eap_sim_aka_result_ind;
 207
 208         /**
 209          * tnc - Trusted Network Connect (TNC)
 210          *
 211          * This controls whether TNC is enabled and will be required before the
 212          * peer is allowed to connect. Note: This is only used with EAP-TTLS
 213          * and EAP-FAST. If any other EAP method is enabled, the peer will be
 214          * allowed to connect without TNC.
 215          */
 216         int tnc;
 217
 218         /**
 219          * pwd_group - The D-H group assigned for EAP-pwd
 220          *
 221          * If EAP-pwd is not used it can be set to zero.
 222          */
 223         u16 pwd_group;
 224
 225         /**
 226          * wps - Wi-Fi Protected Setup context
 227          *
 228          * If WPS is used with an external RADIUS server (which is quite
 229          * unlikely configuration), this is used to provide a pointer to WPS
 230          * context data. Normally, this can be set to %NULL.
 231          */
 232         struct wps_context *wps;
 233
 234         /**
 235          * ipv6 - Whether to enable IPv6 support in the RADIUS server
 236          */
 237         int ipv6;
 238
 239         /**
 240          * start_time - Timestamp of server start
 241          */
 242         struct os_time start_time;
 243
 244         /**
 245          * counters - Statistics counters for server operations
 246          *
 247          * These counters are the sum over all clients.
 248          */
 249         struct radius_server_counters counters;
 250
 251         /**
 252          * get_eap_user - Callback for fetching EAP user information
 253          * @ctx: Context data from conf_ctx
 254          * @identity: User identity
 255          * @identity_len: identity buffer length in octets
 256          * @phase2: Whether this is for Phase 2 identity
 257          * @user: Data structure for filling in the user information
 258          * Returns: 0 on success, -1 on failure
 259          *
 260          * This is used to fetch information from user database. The callback
 261          * will fill in information about allowed EAP methods and the user
 262          * password. The password field will be an allocated copy of the
 263          * password data and RADIUS server will free it after use.
 264          */
 265         int (*get_eap_user)(void *ctx, const u8 *identity, size_t identity_len,
 266                             int phase2, struct eap_user *user);
 267
 268         /**
 269          * eap_req_id_text - Optional data for EAP-Request/Identity
 270          *
 271          * This can be used to configure an optional, displayable message that
 272          * will be sent in EAP-Request/Identity. This string can contain an
 273          * ASCII-0 character (nul) to separate network infromation per RFC
 274          * 4284. The actual string length is explicit provided in
 275          * eap_req_id_text_len since nul character will not be used as a string
 276          * terminator.
 277          */
 278         char *eap_req_id_text;
 279
 280         /**
 281          * eap_req_id_text_len - Length of eap_req_id_text buffer in octets
 282          */
 283         size_t eap_req_id_text_len;
 284
 285         /*
 286          * msg_ctx - Context data for wpa_msg() calls
 287          */
 288         void *msg_ctx;
 289
 290 #ifdef CONFIG_RADIUS_TEST
 291         char *dump_msk_file;
 292 #endif /* CONFIG_RADIUS_TEST */
 293 };
 294
 295
 296 extern int wpa_debug_level;
 297
 298 #define RADIUS_DEBUG(args...) \
 299 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
 300 #define RADIUS_ERROR(args...) \
 301 wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
 302 #define RADIUS_DUMP(args...) \
 303 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
 304 #define RADIUS_DUMP_ASCII(args...) \
 305 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
 306
 307
 308 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
 309 static void radius_server_session_remove_timeout(void *eloop_ctx,
 310                                                  void *timeout_ctx);
 311
 312
 313 static struct radius_client *
 314 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
 315                          int ipv6)
 316 {
 317         struct radius_client *client = data->clients;
 318
 319         while (client) {
 320 #ifdef CONFIG_IPV6
 321                 if (ipv6) {
 322                         struct in6_addr *addr6;
 323                         int i;
 324
 325                         addr6 = (struct in6_addr *) addr;
 326                         for (i = 0; i < 16; i++) {
 327                                 if ((addr6->s6_addr[i] &
 328                                      client->mask6.s6_addr[i]) !=
 329                                     (client->addr6.s6_addr[i] &
 330                                      client->mask6.s6_addr[i])) {
 331                                         i = 17;
 332                                         break;
 333                                 }
 334                         }
 335                         if (i == 16) {
 336                                 break;
 337                         }
 338                 }
 339 #endif /* CONFIG_IPV6 */
 340                 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
 341                     (addr->s_addr & client->mask.s_addr)) {
 342                         break;
 343                 }
 344
 345                 client = client->next;
 346         }
 347
 348         return client;
 349 }
 350
 351
 352 static struct radius_session *
 353 radius_server_get_session(struct radius_client *client, unsigned int sess_id)
 354 {
 355         struct radius_session *sess = client->sessions;
 356
 357         while (sess) {
 358                 if (sess->sess_id == sess_id) {
 359                         break;
 360                 }
 361                 sess = sess->next;
 362         }
 363
 364         return sess;
 365 }
 366
 367
 368 static void radius_server_session_free(struct radius_server_data *data,
 369                                        struct radius_session *sess)
 370 {
 371         eloop_cancel_timeout(radius_server_session_timeout, data, sess);
 372         eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
 373         eap_server_sm_deinit(sess->eap);
 374         radius_msg_free(sess->last_msg);
 375         os_free(sess->last_from_addr);
 376         radius_msg_free(sess->last_reply);
 377         os_free(sess);
 378         data->num_sess--;
 379 }
 380
 381
 382 static void radius_server_session_remove(struct radius_server_data *data,
 383                                          struct radius_session *sess)
 384 {
 385         struct radius_client *client = sess->client;
 386         struct radius_session *session, *prev;
 387
 388         eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
 389
 390         prev = NULL;
 391         session = client->sessions;
 392         while (session) {
 393                 if (session == sess) {
 394                         if (prev == NULL) {
 395                                 client->sessions = sess->next;
 396                         } else {
 397                                 prev->next = sess->next;
 398                         }
 399                         radius_server_session_free(data, sess);
 400                         break;
 401                 }
 402                 prev = session;
 403                 session = session->next;
 404         }
 405 }
 406
 407
 408 static void radius_server_session_remove_timeout(void *eloop_ctx,
 409                                                  void *timeout_ctx)
 410 {
 411         struct radius_server_data *data = eloop_ctx;
 412         struct radius_session *sess = timeout_ctx;
 413         RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
 414         radius_server_session_remove(data, sess);
 415 }
 416
 417
 418 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
 419 {
 420         struct radius_server_data *data = eloop_ctx;
 421         struct radius_session *sess = timeout_ctx;
 422
 423         RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
 424         radius_server_session_remove(data, sess);
 425 }
 426
 427
 428 static struct radius_session *
 429 radius_server_new_session(struct radius_server_data *data,
 430                           struct radius_client *client)
 431 {
 432         struct radius_session *sess;
 433
 434         if (data->num_sess >= RADIUS_MAX_SESSION) {
 435                 RADIUS_DEBUG("Maximum number of existing session - no room "
 436                              "for a new session");
 437                 return NULL;
 438         }
 439
 440         sess = os_zalloc(sizeof(*sess));
 441         if (sess == NULL)
 442                 return NULL;
 443
 444         sess->server = data;
 445         sess->client = client;
 446         sess->sess_id = data->next_sess_id++;
 447         sess->next = client->sessions;
 448         client->sessions = sess;
 449         eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
 450                                radius_server_session_timeout, data, sess);
 451         data->num_sess++;
 452         return sess;
 453 }
 454
 455
 456 static struct radius_session *
 457 radius_server_get_new_session(struct radius_server_data *data,
 458                               struct radius_client *client,
 459                               struct radius_msg *msg)
 460 {
 461         u8 *user;
 462         size_t user_len;
 463         int res;
 464         struct radius_session *sess;
 465         struct eap_config eap_conf;
 466
 467         RADIUS_DEBUG("Creating a new session");
 468
 469         user = os_malloc(256);
 470         if (user == NULL) {
 471                 return NULL;
 472         }
 473         res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
 474         if (res < 0 || res > 256) {
 475                 RADIUS_DEBUG("Could not get User-Name");
 476                 os_free(user);
 477                 return NULL;
 478         }
 479         user_len = res;
 480         RADIUS_DUMP_ASCII("User-Name", user, user_len);
 481
 482         res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
 483         os_free(user);
 484
 485         if (res == 0) {
 486                 RADIUS_DEBUG("Matching user entry found");
 487                 sess = radius_server_new_session(data, client);
 488                 if (sess == NULL) {
 489                         RADIUS_DEBUG("Failed to create a new session");
 490                         return NULL;
 491                 }
 492         } else {
 493                 RADIUS_DEBUG("User-Name not found from user database");
 494                 return NULL;
 495         }
 496
 497         os_memset(&eap_conf, 0, sizeof(eap_conf));
 498         eap_conf.ssl_ctx = data->ssl_ctx;
 499         eap_conf.msg_ctx = data->msg_ctx;
 500         eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
 501         eap_conf.backend_auth = TRUE;
 502         eap_conf.eap_server = 1;
 503         eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
 504         eap_conf.eap_fast_a_id = data->eap_fast_a_id;
 505         eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
 506         eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
 507         eap_conf.eap_fast_prov = data->eap_fast_prov;
 508         eap_conf.pac_key_lifetime = data->pac_key_lifetime;
 509         eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
 510         eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
 511         eap_conf.tnc = data->tnc;
 512         eap_conf.wps = data->wps;
 513         eap_conf.pwd_group = data->pwd_group;
 514         sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
 515                                        &eap_conf);
 516         if (sess->eap == NULL) {
 517                 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
 518                              "new session");
 519                 radius_server_session_free(data, sess);
 520                 return NULL;
 521         }
 522         sess->eap_if = eap_get_interface(sess->eap);
 523         sess->eap_if->eapRestart = TRUE;
 524         sess->eap_if->portEnabled = TRUE;
 525
 526         RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
 527
 528         return sess;
 529 }
 530
 531
 532 static struct radius_msg *
 533 radius_server_encapsulate_eap(struct radius_server_data *data,
 534                               struct radius_client *client,
 535                               struct radius_session *sess,
 536                               struct radius_msg *request)
 537 {
 538         struct radius_msg *msg;
 539         int code;
 540         unsigned int sess_id;
 541         struct radius_hdr *hdr = radius_msg_get_hdr(request);
 542
 543         if (sess->eap_if->eapFail) {
 544                 sess->eap_if->eapFail = FALSE;
 545                 code = RADIUS_CODE_ACCESS_REJECT;
 546         } else if (sess->eap_if->eapSuccess) {
 547                 sess->eap_if->eapSuccess = FALSE;
 548                 code = RADIUS_CODE_ACCESS_ACCEPT;
 549         } else {
 550                 sess->eap_if->eapReq = FALSE;
 551                 code = RADIUS_CODE_ACCESS_CHALLENGE;
 552         }
 553
 554         msg = radius_msg_new(code, hdr->identifier);
 555         if (msg == NULL) {
 556                 RADIUS_DEBUG("Failed to allocate reply message");
 557                 return NULL;
 558         }
 559
 560         sess_id = htonl(sess->sess_id);
 561         if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
 562             !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
 563                                  (u8 *) &sess_id, sizeof(sess_id))) {
 564                 RADIUS_DEBUG("Failed to add State attribute");
 565         }
 566
 567         if (sess->eap_if->eapReqData &&
 568             !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
 569                                 wpabuf_len(sess->eap_if->eapReqData))) {
 570                 RADIUS_DEBUG("Failed to add EAP-Message attribute");
 571         }
 572
 573         if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
 574                 int len;
 575 #ifdef CONFIG_RADIUS_TEST
 576                 if (data->dump_msk_file) {
 577                         FILE *f;
 578                         char buf[2 * 64 + 1];
 579                         f = fopen(data->dump_msk_file, "a");
 580                         if (f) {
 581                                 len = sess->eap_if->eapKeyDataLen;
 582                                 if (len > 64)
 583                                         len = 64;
 584                                 len = wpa_snprintf_hex(
 585                                         buf, sizeof(buf),
 586                                         sess->eap_if->eapKeyData, len);
 587                                 buf[len] = '\0';
 588                                 fprintf(f, "%s\n", buf);
 589                                 fclose(f);
 590                         }
 591                 }
 592 #endif /* CONFIG_RADIUS_TEST */
 593                 if (sess->eap_if->eapKeyDataLen > 64) {
 594                         len = 32;
 595                 } else {
 596                         len = sess->eap_if->eapKeyDataLen / 2;
 597                 }
 598                 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
 599                                               (u8 *) client->shared_secret,
 600                                               client->shared_secret_len,
 601                                               sess->eap_if->eapKeyData + len,
 602                                               len, sess->eap_if->eapKeyData,
 603                                               len)) {
 604                         RADIUS_DEBUG("Failed to add MPPE key attributes");
 605                 }
 606         }
 607
 608         if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
 609                 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
 610                 radius_msg_free(msg);
 611                 return NULL;
 612         }
 613
 614         if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
 615                                   client->shared_secret_len,
 616                                   hdr->authenticator) < 0) {
 617                 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
 618         }
 619
 620         return msg;
 621 }
 622
 623
 624 static int radius_server_reject(struct radius_server_data *data,
 625                                 struct radius_client *client,
 626                                 struct radius_msg *request,
 627                                 struct sockaddr *from, socklen_t fromlen,
 628                                 const char *from_addr, int from_port)
 629 {
 630         struct radius_msg *msg;
 631         int ret = 0;
 632         struct eap_hdr eapfail;
 633         struct wpabuf *buf;
 634         struct radius_hdr *hdr = radius_msg_get_hdr(request);
 635
 636         RADIUS_DEBUG("Reject invalid request from %s:%d",
 637                      from_addr, from_port);
 638
 639         msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
 640         if (msg == NULL) {
 641                 return -1;
 642         }
 643
 644         os_memset(&eapfail, 0, sizeof(eapfail));
 645         eapfail.code = EAP_CODE_FAILURE;
 646         eapfail.identifier = 0;
 647         eapfail.length = host_to_be16(sizeof(eapfail));
 648
 649         if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
 650                 RADIUS_DEBUG("Failed to add EAP-Message attribute");
 651         }
 652
 653         if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
 654                 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
 655                 radius_msg_free(msg);
 656                 return -1;
 657         }
 658
 659         if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
 660                                   client->shared_secret_len,
 661                                   hdr->authenticator) <
 662             0) {
 663                 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
 664         }
 665
 666         if (wpa_debug_level <= MSG_MSGDUMP) {
 667                 radius_msg_dump(msg);
 668         }
 669
 670         data->counters.access_rejects++;
 671         client->counters.access_rejects++;
 672         buf = radius_msg_get_buf(msg);
 673         if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
 674                    (struct sockaddr *) from, sizeof(*from)) < 0) {
 675                 perror("sendto[RADIUS SRV]");
 676                 ret = -1;
 677         }
 678
 679         radius_msg_free(msg);
 680
 681         return ret;
 682 }
 683
 684
 685 static int radius_server_request(struct radius_server_data *data,
 686                                  struct radius_msg *msg,
 687                                  struct sockaddr *from, socklen_t fromlen,
 688                                  struct radius_client *client,
 689                                  const char *from_addr, int from_port,
 690                                  struct radius_session *force_sess)
 691 {
 692         u8 *eap = NULL;
 693         size_t eap_len;
 694         int res, state_included = 0;
 695         u8 statebuf[4];
 696         unsigned int state;
 697         struct radius_session *sess;
 698         struct radius_msg *reply;
 699         int is_complete = 0;
 700
 701         if (force_sess)
 702                 sess = force_sess;
 703         else {
 704                 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
 705                                           sizeof(statebuf));
 706                 state_included = res >= 0;
 707                 if (res == sizeof(statebuf)) {
 708                         state = WPA_GET_BE32(statebuf);
 709                         sess = radius_server_get_session(client, state);
 710                 } else {
 711                         sess = NULL;
 712                 }
 713         }
 714
 715         if (sess) {
 716                 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
 717         } else if (state_included) {
 718                 RADIUS_DEBUG("State attribute included but no session found");
 719                 radius_server_reject(data, client, msg, from, fromlen,
 720                                      from_addr, from_port);
 721                 return -1;
 722         } else {
 723                 sess = radius_server_get_new_session(data, client, msg);
 724                 if (sess == NULL) {
 725                         RADIUS_DEBUG("Could not create a new session");
 726                         radius_server_reject(data, client, msg, from, fromlen,
 727                                              from_addr, from_port);
 728                         return -1;
 729                 }
 730         }
 731
 732         if (sess->last_from_port == from_port &&
 733             sess->last_identifier == radius_msg_get_hdr(msg)->identifier &&
 734             os_memcmp(sess->last_authenticator,
 735                       radius_msg_get_hdr(msg)->authenticator, 16) == 0) {
 736                 RADIUS_DEBUG("Duplicate message from %s", from_addr);
 737                 data->counters.dup_access_requests++;
 738                 client->counters.dup_access_requests++;
 739
 740                 if (sess->last_reply) {
 741                         struct wpabuf *buf;
 742                         buf = radius_msg_get_buf(sess->last_reply);
 743                         res = sendto(data->auth_sock, wpabuf_head(buf),
 744                                      wpabuf_len(buf), 0,
 745                                      (struct sockaddr *) from, fromlen);
 746                         if (res < 0) {
 747                                 perror("sendto[RADIUS SRV]");
 748                         }
 749                         return 0;
 750                 }
 751
 752                 RADIUS_DEBUG("No previous reply available for duplicate "
 753                              "message");
 754                 return -1;
 755         }
 756
 757         eap = radius_msg_get_eap(msg, &eap_len);
 758         if (eap == NULL) {
 759                 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
 760                              from_addr);
 761                 data->counters.packets_dropped++;
 762                 client->counters.packets_dropped++;
 763                 return -1;
 764         }
 765
 766         RADIUS_DUMP("Received EAP data", eap, eap_len);
 767
 768         /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
 769          * RFC3579 Sect. 2.6.2.
 770          * Include EAP-Response/Nak with no preferred method if
 771          * code == request.
 772          * If code is not 1-4, discard the packet silently.
 773          * Or is this already done by the EAP state machine? */
 774
 775         wpabuf_free(sess->eap_if->eapRespData);
 776         sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
 777         if (sess->eap_if->eapRespData == NULL)
 778                 os_free(eap);
 779         eap = NULL;
 780         sess->eap_if->eapResp = TRUE;
 781         eap_server_sm_step(sess->eap);
 782
 783         if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
 784              sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
 785                 RADIUS_DUMP("EAP data from the state machine",
 786                             wpabuf_head(sess->eap_if->eapReqData),
 787                             wpabuf_len(sess->eap_if->eapReqData));
 788         } else if (sess->eap_if->eapFail) {
 789                 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
 790                              "set");
 791         } else if (eap_sm_method_pending(sess->eap)) {
 792                 radius_msg_free(sess->last_msg);
 793                 sess->last_msg = msg;
 794                 sess->last_from_port = from_port;
 795                 os_free(sess->last_from_addr);
 796                 sess->last_from_addr = os_strdup(from_addr);
 797                 sess->last_fromlen = fromlen;
 798                 os_memcpy(&sess->last_from, from, fromlen);
 799                 return -2;
 800         } else {
 801                 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
 802                              " Access-Request silently (assuming it was a "
 803                              "duplicate)");
 804                 data->counters.packets_dropped++;
 805                 client->counters.packets_dropped++;
 806                 return -1;
 807         }
 808
 809         if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
 810                 is_complete = 1;
 811
 812         reply = radius_server_encapsulate_eap(data, client, sess, msg);
 813
 814         if (reply) {
 815                 struct wpabuf *buf;
 816                 struct radius_hdr *hdr;
 817
 818                 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
 819                 if (wpa_debug_level <= MSG_MSGDUMP) {
 820                         radius_msg_dump(reply);
 821                 }
 822
 823                 switch (radius_msg_get_hdr(reply)->code) {
 824                 case RADIUS_CODE_ACCESS_ACCEPT:
 825                         data->counters.access_accepts++;
 826                         client->counters.access_accepts++;
 827                         break;
 828                 case RADIUS_CODE_ACCESS_REJECT:
 829                         data->counters.access_rejects++;
 830                         client->counters.access_rejects++;
 831                         break;
 832                 case RADIUS_CODE_ACCESS_CHALLENGE:
 833                         data->counters.access_challenges++;
 834                         client->counters.access_challenges++;
 835                         break;
 836                 }
 837                 buf = radius_msg_get_buf(reply);
 838                 res = sendto(data->auth_sock, wpabuf_head(buf),
 839                              wpabuf_len(buf), 0,
 840                              (struct sockaddr *) from, fromlen);
 841                 if (res < 0) {
 842                         perror("sendto[RADIUS SRV]");
 843                 }
 844                 radius_msg_free(sess->last_reply);
 845                 sess->last_reply = reply;
 846                 sess->last_from_port = from_port;
 847                 hdr = radius_msg_get_hdr(msg);
 848                 sess->last_identifier = hdr->identifier;
 849                 os_memcpy(sess->last_authenticator, hdr->authenticator, 16);
 850         } else {
 851                 data->counters.packets_dropped++;
 852                 client->counters.packets_dropped++;
 853         }
 854
 855         if (is_complete) {
 856                 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
 857                              sess->sess_id);
 858                 eloop_cancel_timeout(radius_server_session_remove_timeout,
 859                                      data, sess);
 860                 eloop_register_timeout(10, 0,
 861                                        radius_server_session_remove_timeout,
 862                                        data, sess);
 863         }
 864
 865         return 0;
 866 }
 867
 868
 869 static void radius_server_receive_auth(int sock, void *eloop_ctx,
 870                                        void *sock_ctx)
 871 {
 872         struct radius_server_data *data = eloop_ctx;
 873         u8 *buf = NULL;
 874         union {
 875                 struct sockaddr_storage ss;
 876                 struct sockaddr_in sin;
 877 #ifdef CONFIG_IPV6
 878                 struct sockaddr_in6 sin6;
 879 #endif /* CONFIG_IPV6 */
 880         } from;
 881         socklen_t fromlen;
 882         int len;
 883         struct radius_client *client = NULL;
 884         struct radius_msg *msg = NULL;
 885         char abuf[50];
 886         int from_port = 0;
 887
 888         buf = os_malloc(RADIUS_MAX_MSG_LEN);
 889         if (buf == NULL) {
 890                 goto fail;
 891         }
 892
 893         fromlen = sizeof(from);
 894         len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
 895                        (struct sockaddr *) &from.ss, &fromlen);
 896         if (len < 0) {
 897                 perror("recvfrom[radius_server]");
 898                 goto fail;
 899         }
 900
 901 #ifdef CONFIG_IPV6
 902         if (data->ipv6) {
 903                 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
 904                               sizeof(abuf)) == NULL)
 905                         abuf[0] = '\0';
 906                 from_port = ntohs(from.sin6.sin6_port);
 907                 RADIUS_DEBUG("Received %d bytes from %s:%d",
 908                              len, abuf, from_port);
 909
 910                 client = radius_server_get_client(data,
 911                                                   (struct in_addr *)
 912                                                   &from.sin6.sin6_addr, 1);
 913         }
 914 #endif /* CONFIG_IPV6 */
 915
 916         if (!data->ipv6) {
 917                 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
 918                 from_port = ntohs(from.sin.sin_port);
 919                 RADIUS_DEBUG("Received %d bytes from %s:%d",
 920                              len, abuf, from_port);
 921
 922                 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
 923         }
 924
 925         RADIUS_DUMP("Received data", buf, len);
 926
 927         if (client == NULL) {
 928                 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
 929                 data->counters.invalid_requests++;
 930                 goto fail;
 931         }
 932
 933         msg = radius_msg_parse(buf, len);
 934         if (msg == NULL) {
 935                 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
 936                 data->counters.malformed_access_requests++;
 937                 client->counters.malformed_access_requests++;
 938                 goto fail;
 939         }
 940
 941         os_free(buf);
 942         buf = NULL;
 943
 944         if (wpa_debug_level <= MSG_MSGDUMP) {
 945                 radius_msg_dump(msg);
 946         }
 947
 948         if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
 949                 RADIUS_DEBUG("Unexpected RADIUS code %d",
 950                              radius_msg_get_hdr(msg)->code);
 951                 data->counters.unknown_types++;
 952                 client->counters.unknown_types++;
 953                 goto fail;
 954         }
 955
 956         data->counters.access_requests++;
 957         client->counters.access_requests++;
 958
 959         if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
 960                                        client->shared_secret_len, NULL)) {
 961                 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
 962                 data->counters.bad_authenticators++;
 963                 client->counters.bad_authenticators++;
 964                 goto fail;
 965         }
 966
 967         if (radius_server_request(data, msg, (struct sockaddr *) &from,
 968                                   fromlen, client, abuf, from_port, NULL) ==
 969             -2)
 970                 return; /* msg was stored with the session */
 971
 972 fail:
 973         radius_msg_free(msg);
 974         os_free(buf);
 975 }
 976
 977
 978 static int radius_server_disable_pmtu_discovery(int s)
 979 {
 980         int r = -1;
 981 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
 982         /* Turn off Path MTU discovery on IPv4/UDP sockets. */
 983         int action = IP_PMTUDISC_DONT;
 984         r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
 985                        sizeof(action));
 986         if (r == -1)
 987                 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
 988                            "%s", strerror(errno));
 989 #endif
 990         return r;
 991 }
 992
 993
 994 static int radius_server_open_socket(int port)
 995 {
 996         int s;
 997         struct sockaddr_in addr;
 998
 999         s = socket(PF_INET, SOCK_DGRAM, 0);
1000         if (s < 0) {
1001                 perror("socket");
1002                 return -1;
1003         }
1004
1005         radius_server_disable_pmtu_discovery(s);
1006
1007         os_memset(&addr, 0, sizeof(addr));
1008         addr.sin_family = AF_INET;
1009         addr.sin_port = htons(port);
1010         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1011                 perror("bind");
1012                 close(s);
1013                 return -1;
1014         }
1015
1016         return s;
1017 }
1018
1019
1020 #ifdef CONFIG_IPV6
1021 static int radius_server_open_socket6(int port)
1022 {
1023         int s;
1024         struct sockaddr_in6 addr;
1025
1026         s = socket(PF_INET6, SOCK_DGRAM, 0);
1027         if (s < 0) {
1028                 perror("socket[IPv6]");
1029                 return -1;
1030         }
1031
1032         os_memset(&addr, 0, sizeof(addr));
1033         addr.sin6_family = AF_INET6;
1034         os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
1035         addr.sin6_port = htons(port);
1036         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1037                 perror("bind");
1038                 close(s);
1039                 return -1;
1040         }
1041
1042         return s;
1043 }
1044 #endif /* CONFIG_IPV6 */
1045
1046
1047 static void radius_server_free_sessions(struct radius_server_data *data,
1048                                         struct radius_session *sessions)
1049 {
1050         struct radius_session *session, *prev;
1051
1052         session = sessions;
1053         while (session) {
1054                 prev = session;
1055                 session = session->next;
1056                 radius_server_session_free(data, prev);
1057         }
1058 }
1059
1060
1061 static void radius_server_free_clients(struct radius_server_data *data,
1062                                        struct radius_client *clients)
1063 {
1064         struct radius_client *client, *prev;
1065
1066         client = clients;
1067         while (client) {
1068                 prev = client;
1069                 client = client->next;
1070
1071                 radius_server_free_sessions(data, prev->sessions);
1072                 os_free(prev->shared_secret);
1073                 os_free(prev);
1074         }
1075 }
1076
1077
1078 static struct radius_client *
1079 radius_server_read_clients(const char *client_file, int ipv6)
1080 {
1081         FILE *f;
1082         const int buf_size = 1024;
1083         char *buf, *pos;
1084         struct radius_client *clients, *tail, *entry;
1085         int line = 0, mask, failed = 0, i;
1086         struct in_addr addr;
1087 #ifdef CONFIG_IPV6
1088         struct in6_addr addr6;
1089 #endif /* CONFIG_IPV6 */
1090         unsigned int val;
1091
1092         f = fopen(client_file, "r");
1093         if (f == NULL) {
1094                 RADIUS_ERROR("Could not open client file '%s'", client_file);
1095                 return NULL;
1096         }
1097
1098         buf = os_malloc(buf_size);
1099         if (buf == NULL) {
1100                 fclose(f);
1101                 return NULL;
1102         }
1103
1104         clients = tail = NULL;
1105         while (fgets(buf, buf_size, f)) {
1106                 /* Configuration file format:
1107                  * 192.168.1.0/24 secret
1108                  * 192.168.1.2 secret
1109                  * fe80::211:22ff:fe33:4455/64 secretipv6
1110                  */
1111                 line++;
1112                 buf[buf_size - 1] = '\0';
1113                 pos = buf;
1114                 while (*pos != '\0' && *pos != '\n')
1115                         pos++;
1116                 if (*pos == '\n')
1117                         *pos = '\0';
1118                 if (*buf == '\0' || *buf == '#')
1119                         continue;
1120
1121                 pos = buf;
1122                 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
1123                        (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
1124                        (*pos >= 'A' && *pos <= 'F')) {
1125                         pos++;
1126                 }
1127
1128                 if (*pos == '\0') {
1129                         failed = 1;
1130                         break;
1131                 }
1132
1133                 if (*pos == '/') {
1134                         char *end;
1135                         *pos++ = '\0';
1136                         mask = strtol(pos, &end, 10);
1137                         if ((pos == end) ||
1138                             (mask < 0 || mask > (ipv6 ? 128 : 32))) {
1139                                 failed = 1;
1140                                 break;
1141                         }
1142                         pos = end;
1143                 } else {
1144                         mask = ipv6 ? 128 : 32;
1145                         *pos++ = '\0';
1146                 }
1147
1148                 if (!ipv6 && inet_aton(buf, &addr) == 0) {
1149                         failed = 1;
1150                         break;
1151                 }
1152 #ifdef CONFIG_IPV6
1153                 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
1154                         if (inet_pton(AF_INET, buf, &addr) <= 0) {
1155                                 failed = 1;
1156                                 break;
1157                         }
1158                         /* Convert IPv4 address to IPv6 */
1159                         if (mask <= 32)
1160                                 mask += (128 - 32);
1161                         os_memset(addr6.s6_addr, 0, 10);
1162                         addr6.s6_addr[10] = 0xff;
1163                         addr6.s6_addr[11] = 0xff;
1164                         os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
1165                                   4);
1166                 }
1167 #endif /* CONFIG_IPV6 */
1168
1169                 while (*pos == ' ' || *pos == '\t') {
1170                         pos++;
1171                 }
1172
1173                 if (*pos == '\0') {
1174                         failed = 1;
1175                         break;
1176                 }
1177
1178                 entry = os_zalloc(sizeof(*entry));
1179                 if (entry == NULL) {
1180                         failed = 1;
1181                         break;
1182                 }
1183                 entry->shared_secret = os_strdup(pos);
1184                 if (entry->shared_secret == NULL) {
1185                         failed = 1;
1186                         os_free(entry);
1187                         break;
1188                 }
1189                 entry->shared_secret_len = os_strlen(entry->shared_secret);
1190                 entry->addr.s_addr = addr.s_addr;
1191                 if (!ipv6) {
1192                         val = 0;
1193                         for (i = 0; i < mask; i++)
1194                                 val |= 1 << (31 - i);
1195                         entry->mask.s_addr = htonl(val);
1196                 }
1197 #ifdef CONFIG_IPV6
1198                 if (ipv6) {
1199                         int offset = mask / 8;
1200
1201                         os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
1202                         os_memset(entry->mask6.s6_addr, 0xff, offset);
1203                         val = 0;
1204                         for (i = 0; i < (mask % 8); i++)
1205                                 val |= 1 << (7 - i);
1206                         if (offset < 16)
1207                                 entry->mask6.s6_addr[offset] = val;
1208                 }
1209 #endif /* CONFIG_IPV6 */
1210
1211                 if (tail == NULL) {
1212                         clients = tail = entry;
1213                 } else {
1214                         tail->next = entry;
1215                         tail = entry;
1216                 }
1217         }
1218
1219         if (failed) {
1220                 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
1221                 radius_server_free_clients(NULL, clients);
1222                 clients = NULL;
1223         }
1224
1225         os_free(buf);
1226         fclose(f);
1227
1228         return clients;
1229 }
1230
1231
1232 /**
1233  * radius_server_init - Initialize RADIUS server
1234  * @conf: Configuration for the RADIUS server
1235  * Returns: Pointer to private RADIUS server context or %NULL on failure
1236  *
1237  * This initializes a RADIUS server instance and returns a context pointer that
1238  * will be used in other calls to the RADIUS server module. The server can be
1239  * deinitialize by calling radius_server_deinit().
1240  */
1241 struct radius_server_data *
1242 radius_server_init(struct radius_server_conf *conf)
1243 {
1244         struct radius_server_data *data;
1245
1246 #ifndef CONFIG_IPV6
1247         if (conf->ipv6) {
1248                 fprintf(stderr, "RADIUS server compiled without IPv6 "
1249                         "support.\n");
1250                 return NULL;
1251         }
1252 #endif /* CONFIG_IPV6 */
1253
1254         data = os_zalloc(sizeof(*data));
1255         if (data == NULL)
1256                 return NULL;
1257
1258         os_get_time(&data->start_time);
1259         data->conf_ctx = conf->conf_ctx;
1260         data->eap_sim_db_priv = conf->eap_sim_db_priv;
1261         data->ssl_ctx = conf->ssl_ctx;
1262         data->msg_ctx = conf->msg_ctx;
1263         data->ipv6 = conf->ipv6;
1264         if (conf->pac_opaque_encr_key) {
1265                 data->pac_opaque_encr_key = os_malloc(16);
1266                 os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
1267                           16);
1268         }
1269         if (conf->eap_fast_a_id) {
1270                 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
1271                 if (data->eap_fast_a_id) {
1272                         os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
1273                                   conf->eap_fast_a_id_len);
1274                         data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
1275                 }
1276         }
1277         if (conf->eap_fast_a_id_info)
1278                 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
1279         data->eap_fast_prov = conf->eap_fast_prov;
1280         data->pac_key_lifetime = conf->pac_key_lifetime;
1281         data->pac_key_refresh_time = conf->pac_key_refresh_time;
1282         data->get_eap_user = conf->get_eap_user;
1283         data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
1284         data->tnc = conf->tnc;
1285         data->wps = conf->wps;
1286         data->pwd_group = conf->pwd_group;
1287         if (conf->eap_req_id_text) {
1288                 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
1289                 if (data->eap_req_id_text) {
1290                         os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
1291                                   conf->eap_req_id_text_len);
1292                         data->eap_req_id_text_len = conf->eap_req_id_text_len;
1293                 }
1294         }
1295
1296 #ifdef CONFIG_RADIUS_TEST
1297         if (conf->dump_msk_file)
1298                 data->dump_msk_file = os_strdup(conf->dump_msk_file);
1299 #endif /* CONFIG_RADIUS_TEST */
1300
1301         data->clients = radius_server_read_clients(conf->client_file,
1302                                                    conf->ipv6);
1303         if (data->clients == NULL) {
1304                 printf("No RADIUS clients configured.\n");
1305                 radius_server_deinit(data);
1306                 return NULL;
1307         }
1308
1309 #ifdef CONFIG_IPV6
1310         if (conf->ipv6)
1311                 data->auth_sock = radius_server_open_socket6(conf->auth_port);
1312         else
1313 #endif /* CONFIG_IPV6 */
1314         data->auth_sock = radius_server_open_socket(conf->auth_port);
1315         if (data->auth_sock < 0) {
1316                 printf("Failed to open UDP socket for RADIUS authentication "
1317                        "server\n");
1318                 radius_server_deinit(data);
1319                 return NULL;
1320         }
1321         if (eloop_register_read_sock(data->auth_sock,
1322                                      radius_server_receive_auth,
1323                                      data, NULL)) {
1324                 radius_server_deinit(data);
1325                 return NULL;
1326         }
1327
1328         return data;
1329 }
1330
1331
1332 /**
1333  * radius_server_deinit - Deinitialize RADIUS server
1334  * @data: RADIUS server context from radius_server_init()
1335  */
1336 void radius_server_deinit(struct radius_server_data *data)
1337 {
1338         if (data == NULL)
1339                 return;
1340
1341         if (data->auth_sock >= 0) {
1342                 eloop_unregister_read_sock(data->auth_sock);
1343                 close(data->auth_sock);
1344         }
1345
1346         radius_server_free_clients(data, data->clients);
1347
1348         os_free(data->pac_opaque_encr_key);
1349         os_free(data->eap_fast_a_id);
1350         os_free(data->eap_fast_a_id_info);
1351         os_free(data->eap_req_id_text);
1352 #ifdef CONFIG_RADIUS_TEST
1353         os_free(data->dump_msk_file);
1354 #endif /* CONFIG_RADIUS_TEST */
1355         os_free(data);
1356 }
1357
1358
1359 /**
1360  * radius_server_get_mib - Get RADIUS server MIB information
1361  * @data: RADIUS server context from radius_server_init()
1362  * @buf: Buffer for returning the MIB data in text format
1363  * @buflen: buf length in octets
1364  * Returns: Number of octets written into buf
1365  */
1366 int radius_server_get_mib(struct radius_server_data *data, char *buf,
1367                           size_t buflen)
1368 {
1369         int ret, uptime;
1370         unsigned int idx;
1371         char *end, *pos;
1372         struct os_time now;
1373         struct radius_client *cli;
1374
1375         /* RFC 2619 - RADIUS Authentication Server MIB */
1376
1377         if (data == NULL || buflen == 0)
1378                 return 0;
1379
1380         pos = buf;
1381         end = buf + buflen;
1382
1383         os_get_time(&now);
1384         uptime = (now.sec - data->start_time.sec) * 100 +
1385                 ((now.usec - data->start_time.usec) / 10000) % 100;
1386         ret = os_snprintf(pos, end - pos,
1387                           "RADIUS-AUTH-SERVER-MIB\n"
1388                           "radiusAuthServIdent=hostapd\n"
1389                           "radiusAuthServUpTime=%d\n"
1390                           "radiusAuthServResetTime=0\n"
1391                           "radiusAuthServConfigReset=4\n",
1392                           uptime);
1393         if (ret < 0 || ret >= end - pos) {
1394                 *pos = '\0';
1395                 return pos - buf;
1396         }
1397         pos += ret;
1398
1399         ret = os_snprintf(pos, end - pos,
1400                           "radiusAuthServTotalAccessRequests=%u\n"
1401                           "radiusAuthServTotalInvalidRequests=%u\n"
1402                           "radiusAuthServTotalDupAccessRequests=%u\n"
1403                           "radiusAuthServTotalAccessAccepts=%u\n"
1404                           "radiusAuthServTotalAccessRejects=%u\n"
1405                           "radiusAuthServTotalAccessChallenges=%u\n"
1406                           "radiusAuthServTotalMalformedAccessRequests=%u\n"
1407                           "radiusAuthServTotalBadAuthenticators=%u\n"
1408                           "radiusAuthServTotalPacketsDropped=%u\n"
1409                           "radiusAuthServTotalUnknownTypes=%u\n",
1410                           data->counters.access_requests,
1411                           data->counters.invalid_requests,
1412                           data->counters.dup_access_requests,
1413                           data->counters.access_accepts,
1414                           data->counters.access_rejects,
1415                           data->counters.access_challenges,
1416                           data->counters.malformed_access_requests,
1417                           data->counters.bad_authenticators,
1418                           data->counters.packets_dropped,
1419                           data->counters.unknown_types);
1420         if (ret < 0 || ret >= end - pos) {
1421                 *pos = '\0';
1422                 return pos - buf;
1423         }
1424         pos += ret;
1425
1426         for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
1427                 char abuf[50], mbuf[50];
1428 #ifdef CONFIG_IPV6
1429                 if (data->ipv6) {
1430                         if (inet_ntop(AF_INET6, &cli->addr6, abuf,
1431                                       sizeof(abuf)) == NULL)
1432                                 abuf[0] = '\0';
1433                         if (inet_ntop(AF_INET6, &cli->mask6, abuf,
1434                                       sizeof(mbuf)) == NULL)
1435                                 mbuf[0] = '\0';
1436                 }
1437 #endif /* CONFIG_IPV6 */
1438                 if (!data->ipv6) {
1439                         os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
1440                         os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
1441                 }
1442
1443                 ret = os_snprintf(pos, end - pos,
1444                                   "radiusAuthClientIndex=%u\n"
1445                                   "radiusAuthClientAddress=%s/%s\n"
1446                                   "radiusAuthServAccessRequests=%u\n"
1447                                   "radiusAuthServDupAccessRequests=%u\n"
1448                                   "radiusAuthServAccessAccepts=%u\n"
1449                                   "radiusAuthServAccessRejects=%u\n"
1450                                   "radiusAuthServAccessChallenges=%u\n"
1451                                   "radiusAuthServMalformedAccessRequests=%u\n"
1452                                   "radiusAuthServBadAuthenticators=%u\n"
1453                                   "radiusAuthServPacketsDropped=%u\n"
1454                                   "radiusAuthServUnknownTypes=%u\n",
1455                                   idx,
1456                                   abuf, mbuf,
1457                                   cli->counters.access_requests,
1458                                   cli->counters.dup_access_requests,
1459                                   cli->counters.access_accepts,
1460                                   cli->counters.access_rejects,
1461                                   cli->counters.access_challenges,
1462                                   cli->counters.malformed_access_requests,
1463                                   cli->counters.bad_authenticators,
1464                                   cli->counters.packets_dropped,
1465                                   cli->counters.unknown_types);
1466                 if (ret < 0 || ret >= end - pos) {
1467                         *pos = '\0';
1468                         return pos - buf;
1469                 }
1470                 pos += ret;
1471         }
1472
1473         return pos - buf;
1474 }
1475
1476
1477 static int radius_server_get_eap_user(void *ctx, const u8 *identity,
1478                                       size_t identity_len, int phase2,
1479                                       struct eap_user *user)
1480 {
1481         struct radius_session *sess = ctx;
1482         struct radius_server_data *data = sess->server;
1483
1484         return data->get_eap_user(data->conf_ctx, identity, identity_len,
1485                                   phase2, user);
1486 }
1487
1488
1489 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
1490 {
1491         struct radius_session *sess = ctx;
1492         struct radius_server_data *data = sess->server;
1493         *len = data->eap_req_id_text_len;
1494         return data->eap_req_id_text;
1495 }
1496
1497
1498 static struct eapol_callbacks radius_server_eapol_cb =
1499 {
1500         .get_eap_user = radius_server_get_eap_user,
1501         .get_eap_req_id_text = radius_server_get_eap_req_id_text,
1502 };
1503
1504
1505 /**
1506  * radius_server_eap_pending_cb - Pending EAP data notification
1507  * @data: RADIUS server context from radius_server_init()
1508  * @ctx: Pending EAP context pointer
1509  *
1510  * This function is used to notify EAP server module that a pending operation
1511  * has been completed and processing of the EAP session can proceed.
1512  */
1513 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
1514 {
1515         struct radius_client *cli;
1516         struct radius_session *s, *sess = NULL;
1517         struct radius_msg *msg;
1518
1519         if (data == NULL)
1520                 return;
1521
1522         for (cli = data->clients; cli; cli = cli->next) {
1523                 for (s = cli->sessions; s; s = s->next) {
1524                         if (s->eap == ctx && s->last_msg) {
1525                                 sess = s;
1526                                 break;
1527                         }
1528                         if (sess)
1529                                 break;
1530                 }
1531                 if (sess)
1532                         break;
1533         }
1534
1535         if (sess == NULL) {
1536                 RADIUS_DEBUG("No session matched callback ctx");
1537                 return;
1538         }
1539
1540         msg = sess->last_msg;
1541         sess->last_msg = NULL;
1542         eap_sm_pending_cb(sess->eap);
1543         if (radius_server_request(data, msg,
1544                                   (struct sockaddr *) &sess->last_from,
1545                                   sess->last_fromlen, cli,
1546                                   sess->last_from_addr,
1547                                   sess->last_from_port, sess) == -2)
1548                 return; /* msg was stored with the session */
1549
1550         radius_msg_free(msg);
1551 }