src/radius/radius_server.c

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