workbench/network/WirelessManager/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          * msg_ctx - Context data for wpa_msg() calls
 286          */
 287         void *msg_ctx;
 288 };
 289
 290
 291 extern int wpa_debug_level;
 292
 293 #define RADIUS_DEBUG(args...) \
 294 wpa_printf(MSG_DEBUG, "RADIUS SRV: " args)
 295 #define RADIUS_ERROR(args...) \
 296 wpa_printf(MSG_ERROR, "RADIUS SRV: " args)
 297 #define RADIUS_DUMP(args...) \
 298 wpa_hexdump(MSG_MSGDUMP, "RADIUS SRV: " args)
 299 #define RADIUS_DUMP_ASCII(args...) \
 300 wpa_hexdump_ascii(MSG_MSGDUMP, "RADIUS SRV: " args)
 301
 302
 303 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx);
 304 static void radius_server_session_remove_timeout(void *eloop_ctx,
 305                                                  void *timeout_ctx);
 306
 307
 308 static struct radius_client *
 309 radius_server_get_client(struct radius_server_data *data, struct in_addr *addr,
 310                          int ipv6)
 311 {
 312         struct radius_client *client = data->clients;
 313
 314         while (client) {
 315 #ifdef CONFIG_IPV6
 316                 if (ipv6) {
 317                         struct in6_addr *addr6;
 318                         int i;
 319
 320                         addr6 = (struct in6_addr *) addr;
 321                         for (i = 0; i < 16; i++) {
 322                                 if ((addr6->s6_addr[i] &
 323                                      client->mask6.s6_addr[i]) !=
 324                                     (client->addr6.s6_addr[i] &
 325                                      client->mask6.s6_addr[i])) {
 326                                         i = 17;
 327                                         break;
 328                                 }
 329                         }
 330                         if (i == 16) {
 331                                 break;
 332                         }
 333                 }
 334 #endif /* CONFIG_IPV6 */
 335                 if (!ipv6 && (client->addr.s_addr & client->mask.s_addr) ==
 336                     (addr->s_addr & client->mask.s_addr)) {
 337                         break;
 338                 }
 339
 340                 client = client->next;
 341         }
 342
 343         return client;
 344 }
 345
 346
 347 static struct radius_session *
 348 radius_server_get_session(struct radius_client *client, unsigned int sess_id)
 349 {
 350         struct radius_session *sess = client->sessions;
 351
 352         while (sess) {
 353                 if (sess->sess_id == sess_id) {
 354                         break;
 355                 }
 356                 sess = sess->next;
 357         }
 358
 359         return sess;
 360 }
 361
 362
 363 static void radius_server_session_free(struct radius_server_data *data,
 364                                        struct radius_session *sess)
 365 {
 366         eloop_cancel_timeout(radius_server_session_timeout, data, sess);
 367         eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
 368         eap_server_sm_deinit(sess->eap);
 369         radius_msg_free(sess->last_msg);
 370         os_free(sess->last_from_addr);
 371         radius_msg_free(sess->last_reply);
 372         os_free(sess);
 373         data->num_sess--;
 374 }
 375
 376
 377 static void radius_server_session_remove(struct radius_server_data *data,
 378                                          struct radius_session *sess)
 379 {
 380         struct radius_client *client = sess->client;
 381         struct radius_session *session, *prev;
 382
 383         eloop_cancel_timeout(radius_server_session_remove_timeout, data, sess);
 384
 385         prev = NULL;
 386         session = client->sessions;
 387         while (session) {
 388                 if (session == sess) {
 389                         if (prev == NULL) {
 390                                 client->sessions = sess->next;
 391                         } else {
 392                                 prev->next = sess->next;
 393                         }
 394                         radius_server_session_free(data, sess);
 395                         break;
 396                 }
 397                 prev = session;
 398                 session = session->next;
 399         }
 400 }
 401
 402
 403 static void radius_server_session_remove_timeout(void *eloop_ctx,
 404                                                  void *timeout_ctx)
 405 {
 406         struct radius_server_data *data = eloop_ctx;
 407         struct radius_session *sess = timeout_ctx;
 408         RADIUS_DEBUG("Removing completed session 0x%x", sess->sess_id);
 409         radius_server_session_remove(data, sess);
 410 }
 411
 412
 413 static void radius_server_session_timeout(void *eloop_ctx, void *timeout_ctx)
 414 {
 415         struct radius_server_data *data = eloop_ctx;
 416         struct radius_session *sess = timeout_ctx;
 417
 418         RADIUS_DEBUG("Timing out authentication session 0x%x", sess->sess_id);
 419         radius_server_session_remove(data, sess);
 420 }
 421
 422
 423 static struct radius_session *
 424 radius_server_new_session(struct radius_server_data *data,
 425                           struct radius_client *client)
 426 {
 427         struct radius_session *sess;
 428
 429         if (data->num_sess >= RADIUS_MAX_SESSION) {
 430                 RADIUS_DEBUG("Maximum number of existing session - no room "
 431                              "for a new session");
 432                 return NULL;
 433         }
 434
 435         sess = os_zalloc(sizeof(*sess));
 436         if (sess == NULL)
 437                 return NULL;
 438
 439         sess->server = data;
 440         sess->client = client;
 441         sess->sess_id = data->next_sess_id++;
 442         sess->next = client->sessions;
 443         client->sessions = sess;
 444         eloop_register_timeout(RADIUS_SESSION_TIMEOUT, 0,
 445                                radius_server_session_timeout, data, sess);
 446         data->num_sess++;
 447         return sess;
 448 }
 449
 450
 451 static struct radius_session *
 452 radius_server_get_new_session(struct radius_server_data *data,
 453                               struct radius_client *client,
 454                               struct radius_msg *msg)
 455 {
 456         u8 *user;
 457         size_t user_len;
 458         int res;
 459         struct radius_session *sess;
 460         struct eap_config eap_conf;
 461
 462         RADIUS_DEBUG("Creating a new session");
 463
 464         user = os_malloc(256);
 465         if (user == NULL) {
 466                 return NULL;
 467         }
 468         res = radius_msg_get_attr(msg, RADIUS_ATTR_USER_NAME, user, 256);
 469         if (res < 0 || res > 256) {
 470                 RADIUS_DEBUG("Could not get User-Name");
 471                 os_free(user);
 472                 return NULL;
 473         }
 474         user_len = res;
 475         RADIUS_DUMP_ASCII("User-Name", user, user_len);
 476
 477         res = data->get_eap_user(data->conf_ctx, user, user_len, 0, NULL);
 478         os_free(user);
 479
 480         if (res == 0) {
 481                 RADIUS_DEBUG("Matching user entry found");
 482                 sess = radius_server_new_session(data, client);
 483                 if (sess == NULL) {
 484                         RADIUS_DEBUG("Failed to create a new session");
 485                         return NULL;
 486                 }
 487         } else {
 488                 RADIUS_DEBUG("User-Name not found from user database");
 489                 return NULL;
 490         }
 491
 492         os_memset(&eap_conf, 0, sizeof(eap_conf));
 493         eap_conf.ssl_ctx = data->ssl_ctx;
 494         eap_conf.msg_ctx = data->msg_ctx;
 495         eap_conf.eap_sim_db_priv = data->eap_sim_db_priv;
 496         eap_conf.backend_auth = TRUE;
 497         eap_conf.eap_server = 1;
 498         eap_conf.pac_opaque_encr_key = data->pac_opaque_encr_key;
 499         eap_conf.eap_fast_a_id = data->eap_fast_a_id;
 500         eap_conf.eap_fast_a_id_len = data->eap_fast_a_id_len;
 501         eap_conf.eap_fast_a_id_info = data->eap_fast_a_id_info;
 502         eap_conf.eap_fast_prov = data->eap_fast_prov;
 503         eap_conf.pac_key_lifetime = data->pac_key_lifetime;
 504         eap_conf.pac_key_refresh_time = data->pac_key_refresh_time;
 505         eap_conf.eap_sim_aka_result_ind = data->eap_sim_aka_result_ind;
 506         eap_conf.tnc = data->tnc;
 507         eap_conf.wps = data->wps;
 508         sess->eap = eap_server_sm_init(sess, &radius_server_eapol_cb,
 509                                        &eap_conf);
 510         if (sess->eap == NULL) {
 511                 RADIUS_DEBUG("Failed to initialize EAP state machine for the "
 512                              "new session");
 513                 radius_server_session_free(data, sess);
 514                 return NULL;
 515         }
 516         sess->eap_if = eap_get_interface(sess->eap);
 517         sess->eap_if->eapRestart = TRUE;
 518         sess->eap_if->portEnabled = TRUE;
 519
 520         RADIUS_DEBUG("New session 0x%x initialized", sess->sess_id);
 521
 522         return sess;
 523 }
 524
 525
 526 static struct radius_msg *
 527 radius_server_encapsulate_eap(struct radius_server_data *data,
 528                               struct radius_client *client,
 529                               struct radius_session *sess,
 530                               struct radius_msg *request)
 531 {
 532         struct radius_msg *msg;
 533         int code;
 534         unsigned int sess_id;
 535         struct radius_hdr *hdr = radius_msg_get_hdr(request);
 536
 537         if (sess->eap_if->eapFail) {
 538                 sess->eap_if->eapFail = FALSE;
 539                 code = RADIUS_CODE_ACCESS_REJECT;
 540         } else if (sess->eap_if->eapSuccess) {
 541                 sess->eap_if->eapSuccess = FALSE;
 542                 code = RADIUS_CODE_ACCESS_ACCEPT;
 543         } else {
 544                 sess->eap_if->eapReq = FALSE;
 545                 code = RADIUS_CODE_ACCESS_CHALLENGE;
 546         }
 547
 548         msg = radius_msg_new(code, hdr->identifier);
 549         if (msg == NULL) {
 550                 RADIUS_DEBUG("Failed to allocate reply message");
 551                 return NULL;
 552         }
 553
 554         sess_id = htonl(sess->sess_id);
 555         if (code == RADIUS_CODE_ACCESS_CHALLENGE &&
 556             !radius_msg_add_attr(msg, RADIUS_ATTR_STATE,
 557                                  (u8 *) &sess_id, sizeof(sess_id))) {
 558                 RADIUS_DEBUG("Failed to add State attribute");
 559         }
 560
 561         if (sess->eap_if->eapReqData &&
 562             !radius_msg_add_eap(msg, wpabuf_head(sess->eap_if->eapReqData),
 563                                 wpabuf_len(sess->eap_if->eapReqData))) {
 564                 RADIUS_DEBUG("Failed to add EAP-Message attribute");
 565         }
 566
 567         if (code == RADIUS_CODE_ACCESS_ACCEPT && sess->eap_if->eapKeyData) {
 568                 int len;
 569                 if (sess->eap_if->eapKeyDataLen > 64) {
 570                         len = 32;
 571                 } else {
 572                         len = sess->eap_if->eapKeyDataLen / 2;
 573                 }
 574                 if (!radius_msg_add_mppe_keys(msg, hdr->authenticator,
 575                                               (u8 *) client->shared_secret,
 576                                               client->shared_secret_len,
 577                                               sess->eap_if->eapKeyData + len,
 578                                               len, sess->eap_if->eapKeyData,
 579                                               len)) {
 580                         RADIUS_DEBUG("Failed to add MPPE key attributes");
 581                 }
 582         }
 583
 584         if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
 585                 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
 586                 radius_msg_free(msg);
 587                 return NULL;
 588         }
 589
 590         if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
 591                                   client->shared_secret_len,
 592                                   hdr->authenticator) < 0) {
 593                 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
 594         }
 595
 596         return msg;
 597 }
 598
 599
 600 static int radius_server_reject(struct radius_server_data *data,
 601                                 struct radius_client *client,
 602                                 struct radius_msg *request,
 603                                 struct sockaddr *from, socklen_t fromlen,
 604                                 const char *from_addr, int from_port)
 605 {
 606         struct radius_msg *msg;
 607         int ret = 0;
 608         struct eap_hdr eapfail;
 609         struct wpabuf *buf;
 610         struct radius_hdr *hdr = radius_msg_get_hdr(request);
 611
 612         RADIUS_DEBUG("Reject invalid request from %s:%d",
 613                      from_addr, from_port);
 614
 615         msg = radius_msg_new(RADIUS_CODE_ACCESS_REJECT, hdr->identifier);
 616         if (msg == NULL) {
 617                 return -1;
 618         }
 619
 620         os_memset(&eapfail, 0, sizeof(eapfail));
 621         eapfail.code = EAP_CODE_FAILURE;
 622         eapfail.identifier = 0;
 623         eapfail.length = host_to_be16(sizeof(eapfail));
 624
 625         if (!radius_msg_add_eap(msg, (u8 *) &eapfail, sizeof(eapfail))) {
 626                 RADIUS_DEBUG("Failed to add EAP-Message attribute");
 627         }
 628
 629         if (radius_msg_copy_attr(msg, request, RADIUS_ATTR_PROXY_STATE) < 0) {
 630                 RADIUS_DEBUG("Failed to copy Proxy-State attribute(s)");
 631                 radius_msg_free(msg);
 632                 return -1;
 633         }
 634
 635         if (radius_msg_finish_srv(msg, (u8 *) client->shared_secret,
 636                                   client->shared_secret_len,
 637                                   hdr->authenticator) <
 638             0) {
 639                 RADIUS_DEBUG("Failed to add Message-Authenticator attribute");
 640         }
 641
 642         if (wpa_debug_level <= MSG_MSGDUMP) {
 643                 radius_msg_dump(msg);
 644         }
 645
 646         data->counters.access_rejects++;
 647         client->counters.access_rejects++;
 648         buf = radius_msg_get_buf(msg);
 649         if (sendto(data->auth_sock, wpabuf_head(buf), wpabuf_len(buf), 0,
 650                    (struct sockaddr *) from, sizeof(*from)) < 0) {
 651                 perror("sendto[RADIUS SRV]");
 652                 ret = -1;
 653         }
 654
 655         radius_msg_free(msg);
 656
 657         return ret;
 658 }
 659
 660
 661 static int radius_server_request(struct radius_server_data *data,
 662                                  struct radius_msg *msg,
 663                                  struct sockaddr *from, socklen_t fromlen,
 664                                  struct radius_client *client,
 665                                  const char *from_addr, int from_port,
 666                                  struct radius_session *force_sess)
 667 {
 668         u8 *eap = NULL;
 669         size_t eap_len;
 670         int res, state_included = 0;
 671         u8 statebuf[4];
 672         unsigned int state;
 673         struct radius_session *sess;
 674         struct radius_msg *reply;
 675         int is_complete = 0;
 676
 677         if (force_sess)
 678                 sess = force_sess;
 679         else {
 680                 res = radius_msg_get_attr(msg, RADIUS_ATTR_STATE, statebuf,
 681                                           sizeof(statebuf));
 682                 state_included = res >= 0;
 683                 if (res == sizeof(statebuf)) {
 684                         state = WPA_GET_BE32(statebuf);
 685                         sess = radius_server_get_session(client, state);
 686                 } else {
 687                         sess = NULL;
 688                 }
 689         }
 690
 691         if (sess) {
 692                 RADIUS_DEBUG("Request for session 0x%x", sess->sess_id);
 693         } else if (state_included) {
 694                 RADIUS_DEBUG("State attribute included but no session found");
 695                 radius_server_reject(data, client, msg, from, fromlen,
 696                                      from_addr, from_port);
 697                 return -1;
 698         } else {
 699                 sess = radius_server_get_new_session(data, client, msg);
 700                 if (sess == NULL) {
 701                         RADIUS_DEBUG("Could not create a new session");
 702                         radius_server_reject(data, client, msg, from, fromlen,
 703                                              from_addr, from_port);
 704                         return -1;
 705                 }
 706         }
 707
 708         if (sess->last_from_port == from_port &&
 709             sess->last_identifier == radius_msg_get_hdr(msg)->identifier &&
 710             os_memcmp(sess->last_authenticator,
 711                       radius_msg_get_hdr(msg)->authenticator, 16) == 0) {
 712                 RADIUS_DEBUG("Duplicate message from %s", from_addr);
 713                 data->counters.dup_access_requests++;
 714                 client->counters.dup_access_requests++;
 715
 716                 if (sess->last_reply) {
 717                         struct wpabuf *buf;
 718                         buf = radius_msg_get_buf(sess->last_reply);
 719                         res = sendto(data->auth_sock, wpabuf_head(buf),
 720                                      wpabuf_len(buf), 0,
 721                                      (struct sockaddr *) from, fromlen);
 722                         if (res < 0) {
 723                                 perror("sendto[RADIUS SRV]");
 724                         }
 725                         return 0;
 726                 }
 727
 728                 RADIUS_DEBUG("No previous reply available for duplicate "
 729                              "message");
 730                 return -1;
 731         }
 732
 733         eap = radius_msg_get_eap(msg, &eap_len);
 734         if (eap == NULL) {
 735                 RADIUS_DEBUG("No EAP-Message in RADIUS packet from %s",
 736                              from_addr);
 737                 data->counters.packets_dropped++;
 738                 client->counters.packets_dropped++;
 739                 return -1;
 740         }
 741
 742         RADIUS_DUMP("Received EAP data", eap, eap_len);
 743
 744         /* FIX: if Code is Request, Success, or Failure, send Access-Reject;
 745          * RFC3579 Sect. 2.6.2.
 746          * Include EAP-Response/Nak with no preferred method if
 747          * code == request.
 748          * If code is not 1-4, discard the packet silently.
 749          * Or is this already done by the EAP state machine? */
 750
 751         wpabuf_free(sess->eap_if->eapRespData);
 752         sess->eap_if->eapRespData = wpabuf_alloc_ext_data(eap, eap_len);
 753         if (sess->eap_if->eapRespData == NULL)
 754                 os_free(eap);
 755         eap = NULL;
 756         sess->eap_if->eapResp = TRUE;
 757         eap_server_sm_step(sess->eap);
 758
 759         if ((sess->eap_if->eapReq || sess->eap_if->eapSuccess ||
 760              sess->eap_if->eapFail) && sess->eap_if->eapReqData) {
 761                 RADIUS_DUMP("EAP data from the state machine",
 762                             wpabuf_head(sess->eap_if->eapReqData),
 763                             wpabuf_len(sess->eap_if->eapReqData));
 764         } else if (sess->eap_if->eapFail) {
 765                 RADIUS_DEBUG("No EAP data from the state machine, but eapFail "
 766                              "set");
 767         } else if (eap_sm_method_pending(sess->eap)) {
 768                 radius_msg_free(sess->last_msg);
 769                 sess->last_msg = msg;
 770                 sess->last_from_port = from_port;
 771                 os_free(sess->last_from_addr);
 772                 sess->last_from_addr = os_strdup(from_addr);
 773                 sess->last_fromlen = fromlen;
 774                 os_memcpy(&sess->last_from, from, fromlen);
 775                 return -2;
 776         } else {
 777                 RADIUS_DEBUG("No EAP data from the state machine - ignore this"
 778                              " Access-Request silently (assuming it was a "
 779                              "duplicate)");
 780                 data->counters.packets_dropped++;
 781                 client->counters.packets_dropped++;
 782                 return -1;
 783         }
 784
 785         if (sess->eap_if->eapSuccess || sess->eap_if->eapFail)
 786                 is_complete = 1;
 787
 788         reply = radius_server_encapsulate_eap(data, client, sess, msg);
 789
 790         if (reply) {
 791                 struct wpabuf *buf;
 792                 struct radius_hdr *hdr;
 793
 794                 RADIUS_DEBUG("Reply to %s:%d", from_addr, from_port);
 795                 if (wpa_debug_level <= MSG_MSGDUMP) {
 796                         radius_msg_dump(reply);
 797                 }
 798
 799                 switch (radius_msg_get_hdr(reply)->code) {
 800                 case RADIUS_CODE_ACCESS_ACCEPT:
 801                         data->counters.access_accepts++;
 802                         client->counters.access_accepts++;
 803                         break;
 804                 case RADIUS_CODE_ACCESS_REJECT:
 805                         data->counters.access_rejects++;
 806                         client->counters.access_rejects++;
 807                         break;
 808                 case RADIUS_CODE_ACCESS_CHALLENGE:
 809                         data->counters.access_challenges++;
 810                         client->counters.access_challenges++;
 811                         break;
 812                 }
 813                 buf = radius_msg_get_buf(reply);
 814                 res = sendto(data->auth_sock, wpabuf_head(buf),
 815                              wpabuf_len(buf), 0,
 816                              (struct sockaddr *) from, fromlen);
 817                 if (res < 0) {
 818                         perror("sendto[RADIUS SRV]");
 819                 }
 820                 radius_msg_free(sess->last_reply);
 821                 sess->last_reply = reply;
 822                 sess->last_from_port = from_port;
 823                 hdr = radius_msg_get_hdr(msg);
 824                 sess->last_identifier = hdr->identifier;
 825                 os_memcpy(sess->last_authenticator, hdr->authenticator, 16);
 826         } else {
 827                 data->counters.packets_dropped++;
 828                 client->counters.packets_dropped++;
 829         }
 830
 831         if (is_complete) {
 832                 RADIUS_DEBUG("Removing completed session 0x%x after timeout",
 833                              sess->sess_id);
 834                 eloop_cancel_timeout(radius_server_session_remove_timeout,
 835                                      data, sess);
 836                 eloop_register_timeout(10, 0,
 837                                        radius_server_session_remove_timeout,
 838                                        data, sess);
 839         }
 840
 841         return 0;
 842 }
 843
 844
 845 static void radius_server_receive_auth(int sock, void *eloop_ctx,
 846                                        void *sock_ctx)
 847 {
 848         struct radius_server_data *data = eloop_ctx;
 849         u8 *buf = NULL;
 850         union {
 851                 struct sockaddr_storage ss;
 852                 struct sockaddr_in sin;
 853 #ifdef CONFIG_IPV6
 854                 struct sockaddr_in6 sin6;
 855 #endif /* CONFIG_IPV6 */
 856         } from;
 857         socklen_t fromlen;
 858         int len;
 859         struct radius_client *client = NULL;
 860         struct radius_msg *msg = NULL;
 861         char abuf[50];
 862         int from_port = 0;
 863
 864         buf = os_malloc(RADIUS_MAX_MSG_LEN);
 865         if (buf == NULL) {
 866                 goto fail;
 867         }
 868
 869         fromlen = sizeof(from);
 870         len = recvfrom(sock, buf, RADIUS_MAX_MSG_LEN, 0,
 871                        (struct sockaddr *) &from.ss, &fromlen);
 872         if (len < 0) {
 873                 perror("recvfrom[radius_server]");
 874                 goto fail;
 875         }
 876
 877 #ifdef CONFIG_IPV6
 878         if (data->ipv6) {
 879                 if (inet_ntop(AF_INET6, &from.sin6.sin6_addr, abuf,
 880                               sizeof(abuf)) == NULL)
 881                         abuf[0] = '\0';
 882                 from_port = ntohs(from.sin6.sin6_port);
 883                 RADIUS_DEBUG("Received %d bytes from %s:%d",
 884                              len, abuf, from_port);
 885
 886                 client = radius_server_get_client(data,
 887                                                   (struct in_addr *)
 888                                                   &from.sin6.sin6_addr, 1);
 889         }
 890 #endif /* CONFIG_IPV6 */
 891
 892         if (!data->ipv6) {
 893                 os_strlcpy(abuf, inet_ntoa(from.sin.sin_addr), sizeof(abuf));
 894                 from_port = ntohs(from.sin.sin_port);
 895                 RADIUS_DEBUG("Received %d bytes from %s:%d",
 896                              len, abuf, from_port);
 897
 898                 client = radius_server_get_client(data, &from.sin.sin_addr, 0);
 899         }
 900
 901         RADIUS_DUMP("Received data", buf, len);
 902
 903         if (client == NULL) {
 904                 RADIUS_DEBUG("Unknown client %s - packet ignored", abuf);
 905                 data->counters.invalid_requests++;
 906                 goto fail;
 907         }
 908
 909         msg = radius_msg_parse(buf, len);
 910         if (msg == NULL) {
 911                 RADIUS_DEBUG("Parsing incoming RADIUS frame failed");
 912                 data->counters.malformed_access_requests++;
 913                 client->counters.malformed_access_requests++;
 914                 goto fail;
 915         }
 916
 917         os_free(buf);
 918         buf = NULL;
 919
 920         if (wpa_debug_level <= MSG_MSGDUMP) {
 921                 radius_msg_dump(msg);
 922         }
 923
 924         if (radius_msg_get_hdr(msg)->code != RADIUS_CODE_ACCESS_REQUEST) {
 925                 RADIUS_DEBUG("Unexpected RADIUS code %d",
 926                              radius_msg_get_hdr(msg)->code);
 927                 data->counters.unknown_types++;
 928                 client->counters.unknown_types++;
 929                 goto fail;
 930         }
 931
 932         data->counters.access_requests++;
 933         client->counters.access_requests++;
 934
 935         if (radius_msg_verify_msg_auth(msg, (u8 *) client->shared_secret,
 936                                        client->shared_secret_len, NULL)) {
 937                 RADIUS_DEBUG("Invalid Message-Authenticator from %s", abuf);
 938                 data->counters.bad_authenticators++;
 939                 client->counters.bad_authenticators++;
 940                 goto fail;
 941         }
 942
 943         if (radius_server_request(data, msg, (struct sockaddr *) &from,
 944                                   fromlen, client, abuf, from_port, NULL) ==
 945             -2)
 946                 return; /* msg was stored with the session */
 947
 948 fail:
 949         radius_msg_free(msg);
 950         os_free(buf);
 951 }
 952
 953
 954 static int radius_server_disable_pmtu_discovery(int s)
 955 {
 956         int r = -1;
 957 #if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
 958         /* Turn off Path MTU discovery on IPv4/UDP sockets. */
 959         int action = IP_PMTUDISC_DONT;
 960         r = setsockopt(s, IPPROTO_IP, IP_MTU_DISCOVER, &action,
 961                        sizeof(action));
 962         if (r == -1)
 963                 wpa_printf(MSG_ERROR, "Failed to set IP_MTU_DISCOVER: "
 964                            "%s", strerror(errno));
 965 #endif
 966         return r;
 967 }
 968
 969
 970 static int radius_server_open_socket(int port)
 971 {
 972         int s;
 973         struct sockaddr_in addr;
 974
 975         s = socket(PF_INET, SOCK_DGRAM, 0);
 976         if (s < 0) {
 977                 perror("socket");
 978                 return -1;
 979         }
 980
 981         radius_server_disable_pmtu_discovery(s);
 982
 983         os_memset(&addr, 0, sizeof(addr));
 984         addr.sin_family = AF_INET;
 985         addr.sin_port = htons(port);
 986         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 987                 perror("bind");
 988                 close(s);
 989                 return -1;
 990         }
 991
 992         return s;
 993 }
 994
 995
 996 #ifdef CONFIG_IPV6
 997 static int radius_server_open_socket6(int port)
 998 {
 999         int s;
1000         struct sockaddr_in6 addr;
1001
1002         s = socket(PF_INET6, SOCK_DGRAM, 0);
1003         if (s < 0) {
1004                 perror("socket[IPv6]");
1005                 return -1;
1006         }
1007
1008         os_memset(&addr, 0, sizeof(addr));
1009         addr.sin6_family = AF_INET6;
1010         os_memcpy(&addr.sin6_addr, &in6addr_any, sizeof(in6addr_any));
1011         addr.sin6_port = htons(port);
1012         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1013                 perror("bind");
1014                 close(s);
1015                 return -1;
1016         }
1017
1018         return s;
1019 }
1020 #endif /* CONFIG_IPV6 */
1021
1022
1023 static void radius_server_free_sessions(struct radius_server_data *data,
1024                                         struct radius_session *sessions)
1025 {
1026         struct radius_session *session, *prev;
1027
1028         session = sessions;
1029         while (session) {
1030                 prev = session;
1031                 session = session->next;
1032                 radius_server_session_free(data, prev);
1033         }
1034 }
1035
1036
1037 static void radius_server_free_clients(struct radius_server_data *data,
1038                                        struct radius_client *clients)
1039 {
1040         struct radius_client *client, *prev;
1041
1042         client = clients;
1043         while (client) {
1044                 prev = client;
1045                 client = client->next;
1046
1047                 radius_server_free_sessions(data, prev->sessions);
1048                 os_free(prev->shared_secret);
1049                 os_free(prev);
1050         }
1051 }
1052
1053
1054 static struct radius_client *
1055 radius_server_read_clients(const char *client_file, int ipv6)
1056 {
1057         FILE *f;
1058         const int buf_size = 1024;
1059         char *buf, *pos;
1060         struct radius_client *clients, *tail, *entry;
1061         int line = 0, mask, failed = 0, i;
1062         struct in_addr addr;
1063 #ifdef CONFIG_IPV6
1064         struct in6_addr addr6;
1065 #endif /* CONFIG_IPV6 */
1066         unsigned int val;
1067
1068         f = fopen(client_file, "r");
1069         if (f == NULL) {
1070                 RADIUS_ERROR("Could not open client file '%s'", client_file);
1071                 return NULL;
1072         }
1073
1074         buf = os_malloc(buf_size);
1075         if (buf == NULL) {
1076                 fclose(f);
1077                 return NULL;
1078         }
1079
1080         clients = tail = NULL;
1081         while (fgets(buf, buf_size, f)) {
1082                 /* Configuration file format:
1083                  * 192.168.1.0/24 secret
1084                  * 192.168.1.2 secret
1085                  * fe80::211:22ff:fe33:4455/64 secretipv6
1086                  */
1087                 line++;
1088                 buf[buf_size - 1] = '\0';
1089                 pos = buf;
1090                 while (*pos != '\0' && *pos != '\n')
1091                         pos++;
1092                 if (*pos == '\n')
1093                         *pos = '\0';
1094                 if (*buf == '\0' || *buf == '#')
1095                         continue;
1096
1097                 pos = buf;
1098                 while ((*pos >= '0' && *pos <= '9') || *pos == '.' ||
1099                        (*pos >= 'a' && *pos <= 'f') || *pos == ':' ||
1100                        (*pos >= 'A' && *pos <= 'F')) {
1101                         pos++;
1102                 }
1103
1104                 if (*pos == '\0') {
1105                         failed = 1;
1106                         break;
1107                 }
1108
1109                 if (*pos == '/') {
1110                         char *end;
1111                         *pos++ = '\0';
1112                         mask = strtol(pos, &end, 10);
1113                         if ((pos == end) ||
1114                             (mask < 0 || mask > (ipv6 ? 128 : 32))) {
1115                                 failed = 1;
1116                                 break;
1117                         }
1118                         pos = end;
1119                 } else {
1120                         mask = ipv6 ? 128 : 32;
1121                         *pos++ = '\0';
1122                 }
1123
1124                 if (!ipv6 && inet_aton(buf, &addr) == 0) {
1125                         failed = 1;
1126                         break;
1127                 }
1128 #ifdef CONFIG_IPV6
1129                 if (ipv6 && inet_pton(AF_INET6, buf, &addr6) <= 0) {
1130                         if (inet_pton(AF_INET, buf, &addr) <= 0) {
1131                                 failed = 1;
1132                                 break;
1133                         }
1134                         /* Convert IPv4 address to IPv6 */
1135                         if (mask <= 32)
1136                                 mask += (128 - 32);
1137                         os_memset(addr6.s6_addr, 0, 10);
1138                         addr6.s6_addr[10] = 0xff;
1139                         addr6.s6_addr[11] = 0xff;
1140                         os_memcpy(addr6.s6_addr + 12, (char *) &addr.s_addr,
1141                                   4);
1142                 }
1143 #endif /* CONFIG_IPV6 */
1144
1145                 while (*pos == ' ' || *pos == '\t') {
1146                         pos++;
1147                 }
1148
1149                 if (*pos == '\0') {
1150                         failed = 1;
1151                         break;
1152                 }
1153
1154                 entry = os_zalloc(sizeof(*entry));
1155                 if (entry == NULL) {
1156                         failed = 1;
1157                         break;
1158                 }
1159                 entry->shared_secret = os_strdup(pos);
1160                 if (entry->shared_secret == NULL) {
1161                         failed = 1;
1162                         os_free(entry);
1163                         break;
1164                 }
1165                 entry->shared_secret_len = os_strlen(entry->shared_secret);
1166                 entry->addr.s_addr = addr.s_addr;
1167                 if (!ipv6) {
1168                         val = 0;
1169                         for (i = 0; i < mask; i++)
1170                                 val |= 1 << (31 - i);
1171                         entry->mask.s_addr = htonl(val);
1172                 }
1173 #ifdef CONFIG_IPV6
1174                 if (ipv6) {
1175                         int offset = mask / 8;
1176
1177                         os_memcpy(entry->addr6.s6_addr, addr6.s6_addr, 16);
1178                         os_memset(entry->mask6.s6_addr, 0xff, offset);
1179                         val = 0;
1180                         for (i = 0; i < (mask % 8); i++)
1181                                 val |= 1 << (7 - i);
1182                         if (offset < 16)
1183                                 entry->mask6.s6_addr[offset] = val;
1184                 }
1185 #endif /* CONFIG_IPV6 */
1186
1187                 if (tail == NULL) {
1188                         clients = tail = entry;
1189                 } else {
1190                         tail->next = entry;
1191                         tail = entry;
1192                 }
1193         }
1194
1195         if (failed) {
1196                 RADIUS_ERROR("Invalid line %d in '%s'", line, client_file);
1197                 radius_server_free_clients(NULL, clients);
1198                 clients = NULL;
1199         }
1200
1201         os_free(buf);
1202         fclose(f);
1203
1204         return clients;
1205 }
1206
1207
1208 /**
1209  * radius_server_init - Initialize RADIUS server
1210  * @conf: Configuration for the RADIUS server
1211  * Returns: Pointer to private RADIUS server context or %NULL on failure
1212  *
1213  * This initializes a RADIUS server instance and returns a context pointer that
1214  * will be used in other calls to the RADIUS server module. The server can be
1215  * deinitialize by calling radius_server_deinit().
1216  */
1217 struct radius_server_data *
1218 radius_server_init(struct radius_server_conf *conf)
1219 {
1220         struct radius_server_data *data;
1221
1222 #ifndef CONFIG_IPV6
1223         if (conf->ipv6) {
1224                 fprintf(stderr, "RADIUS server compiled without IPv6 "
1225                         "support.\n");
1226                 return NULL;
1227         }
1228 #endif /* CONFIG_IPV6 */
1229
1230         data = os_zalloc(sizeof(*data));
1231         if (data == NULL)
1232                 return NULL;
1233
1234         os_get_time(&data->start_time);
1235         data->conf_ctx = conf->conf_ctx;
1236         data->eap_sim_db_priv = conf->eap_sim_db_priv;
1237         data->ssl_ctx = conf->ssl_ctx;
1238         data->msg_ctx = conf->msg_ctx;
1239         data->ipv6 = conf->ipv6;
1240         if (conf->pac_opaque_encr_key) {
1241                 data->pac_opaque_encr_key = os_malloc(16);
1242                 os_memcpy(data->pac_opaque_encr_key, conf->pac_opaque_encr_key,
1243                           16);
1244         }
1245         if (conf->eap_fast_a_id) {
1246                 data->eap_fast_a_id = os_malloc(conf->eap_fast_a_id_len);
1247                 if (data->eap_fast_a_id) {
1248                         os_memcpy(data->eap_fast_a_id, conf->eap_fast_a_id,
1249                                   conf->eap_fast_a_id_len);
1250                         data->eap_fast_a_id_len = conf->eap_fast_a_id_len;
1251                 }
1252         }
1253         if (conf->eap_fast_a_id_info)
1254                 data->eap_fast_a_id_info = os_strdup(conf->eap_fast_a_id_info);
1255         data->eap_fast_prov = conf->eap_fast_prov;
1256         data->pac_key_lifetime = conf->pac_key_lifetime;
1257         data->pac_key_refresh_time = conf->pac_key_refresh_time;
1258         data->get_eap_user = conf->get_eap_user;
1259         data->eap_sim_aka_result_ind = conf->eap_sim_aka_result_ind;
1260         data->tnc = conf->tnc;
1261         data->wps = conf->wps;
1262         if (conf->eap_req_id_text) {
1263                 data->eap_req_id_text = os_malloc(conf->eap_req_id_text_len);
1264                 if (data->eap_req_id_text) {
1265                         os_memcpy(data->eap_req_id_text, conf->eap_req_id_text,
1266                                   conf->eap_req_id_text_len);
1267                         data->eap_req_id_text_len = conf->eap_req_id_text_len;
1268                 }
1269         }
1270
1271         data->clients = radius_server_read_clients(conf->client_file,
1272                                                    conf->ipv6);
1273         if (data->clients == NULL) {
1274                 printf("No RADIUS clients configured.\n");
1275                 radius_server_deinit(data);
1276                 return NULL;
1277         }
1278
1279 #ifdef CONFIG_IPV6
1280         if (conf->ipv6)
1281                 data->auth_sock = radius_server_open_socket6(conf->auth_port);
1282         else
1283 #endif /* CONFIG_IPV6 */
1284         data->auth_sock = radius_server_open_socket(conf->auth_port);
1285         if (data->auth_sock < 0) {
1286                 printf("Failed to open UDP socket for RADIUS authentication "
1287                        "server\n");
1288                 radius_server_deinit(data);
1289                 return NULL;
1290         }
1291         if (eloop_register_read_sock(data->auth_sock,
1292                                      radius_server_receive_auth,
1293                                      data, NULL)) {
1294                 radius_server_deinit(data);
1295                 return NULL;
1296         }
1297
1298         return data;
1299 }
1300
1301
1302 /**
1303  * radius_server_deinit - Deinitialize RADIUS server
1304  * @data: RADIUS server context from radius_server_init()
1305  */
1306 void radius_server_deinit(struct radius_server_data *data)
1307 {
1308         if (data == NULL)
1309                 return;
1310
1311         if (data->auth_sock >= 0) {
1312                 eloop_unregister_read_sock(data->auth_sock);
1313                 close(data->auth_sock);
1314         }
1315
1316         radius_server_free_clients(data, data->clients);
1317
1318         os_free(data->pac_opaque_encr_key);
1319         os_free(data->eap_fast_a_id);
1320         os_free(data->eap_fast_a_id_info);
1321         os_free(data->eap_req_id_text);
1322         os_free(data);
1323 }
1324
1325
1326 /**
1327  * radius_server_get_mib - Get RADIUS server MIB information
1328  * @data: RADIUS server context from radius_server_init()
1329  * @buf: Buffer for returning the MIB data in text format
1330  * @buflen: buf length in octets
1331  * Returns: Number of octets written into buf
1332  */
1333 int radius_server_get_mib(struct radius_server_data *data, char *buf,
1334                           size_t buflen)
1335 {
1336         int ret, uptime;
1337         unsigned int idx;
1338         char *end, *pos;
1339         struct os_time now;
1340         struct radius_client *cli;
1341
1342         /* RFC 2619 - RADIUS Authentication Server MIB */
1343
1344         if (data == NULL || buflen == 0)
1345                 return 0;
1346
1347         pos = buf;
1348         end = buf + buflen;
1349
1350         os_get_time(&now);
1351         uptime = (now.sec - data->start_time.sec) * 100 +
1352                 ((now.usec - data->start_time.usec) / 10000) % 100;
1353         ret = os_snprintf(pos, end - pos,
1354                           "RADIUS-AUTH-SERVER-MIB\n"
1355                           "radiusAuthServIdent=hostapd\n"
1356                           "radiusAuthServUpTime=%d\n"
1357                           "radiusAuthServResetTime=0\n"
1358                           "radiusAuthServConfigReset=4\n",
1359                           uptime);
1360         if (ret < 0 || ret >= end - pos) {
1361                 *pos = '\0';
1362                 return pos - buf;
1363         }
1364         pos += ret;
1365
1366         ret = os_snprintf(pos, end - pos,
1367                           "radiusAuthServTotalAccessRequests=%u\n"
1368                           "radiusAuthServTotalInvalidRequests=%u\n"
1369                           "radiusAuthServTotalDupAccessRequests=%u\n"
1370                           "radiusAuthServTotalAccessAccepts=%u\n"
1371                           "radiusAuthServTotalAccessRejects=%u\n"
1372                           "radiusAuthServTotalAccessChallenges=%u\n"
1373                           "radiusAuthServTotalMalformedAccessRequests=%u\n"
1374                           "radiusAuthServTotalBadAuthenticators=%u\n"
1375                           "radiusAuthServTotalPacketsDropped=%u\n"
1376                           "radiusAuthServTotalUnknownTypes=%u\n",
1377                           data->counters.access_requests,
1378                           data->counters.invalid_requests,
1379                           data->counters.dup_access_requests,
1380                           data->counters.access_accepts,
1381                           data->counters.access_rejects,
1382                           data->counters.access_challenges,
1383                           data->counters.malformed_access_requests,
1384                           data->counters.bad_authenticators,
1385                           data->counters.packets_dropped,
1386                           data->counters.unknown_types);
1387         if (ret < 0 || ret >= end - pos) {
1388                 *pos = '\0';
1389                 return pos - buf;
1390         }
1391         pos += ret;
1392
1393         for (cli = data->clients, idx = 0; cli; cli = cli->next, idx++) {
1394                 char abuf[50], mbuf[50];
1395 #ifdef CONFIG_IPV6
1396                 if (data->ipv6) {
1397                         if (inet_ntop(AF_INET6, &cli->addr6, abuf,
1398                                       sizeof(abuf)) == NULL)
1399                                 abuf[0] = '\0';
1400                         if (inet_ntop(AF_INET6, &cli->mask6, abuf,
1401                                       sizeof(mbuf)) == NULL)
1402                                 mbuf[0] = '\0';
1403                 }
1404 #endif /* CONFIG_IPV6 */
1405                 if (!data->ipv6) {
1406                         os_strlcpy(abuf, inet_ntoa(cli->addr), sizeof(abuf));
1407                         os_strlcpy(mbuf, inet_ntoa(cli->mask), sizeof(mbuf));
1408                 }
1409
1410                 ret = os_snprintf(pos, end - pos,
1411                                   "radiusAuthClientIndex=%u\n"
1412                                   "radiusAuthClientAddress=%s/%s\n"
1413                                   "radiusAuthServAccessRequests=%u\n"
1414                                   "radiusAuthServDupAccessRequests=%u\n"
1415                                   "radiusAuthServAccessAccepts=%u\n"
1416                                   "radiusAuthServAccessRejects=%u\n"
1417                                   "radiusAuthServAccessChallenges=%u\n"
1418                                   "radiusAuthServMalformedAccessRequests=%u\n"
1419                                   "radiusAuthServBadAuthenticators=%u\n"
1420                                   "radiusAuthServPacketsDropped=%u\n"
1421                                   "radiusAuthServUnknownTypes=%u\n",
1422                                   idx,
1423                                   abuf, mbuf,
1424                                   cli->counters.access_requests,
1425                                   cli->counters.dup_access_requests,
1426                                   cli->counters.access_accepts,
1427                                   cli->counters.access_rejects,
1428                                   cli->counters.access_challenges,
1429                                   cli->counters.malformed_access_requests,
1430                                   cli->counters.bad_authenticators,
1431                                   cli->counters.packets_dropped,
1432                                   cli->counters.unknown_types);
1433                 if (ret < 0 || ret >= end - pos) {
1434                         *pos = '\0';
1435                         return pos - buf;
1436                 }
1437                 pos += ret;
1438         }
1439
1440         return pos - buf;
1441 }
1442
1443
1444 static int radius_server_get_eap_user(void *ctx, const u8 *identity,
1445                                       size_t identity_len, int phase2,
1446                                       struct eap_user *user)
1447 {
1448         struct radius_session *sess = ctx;
1449         struct radius_server_data *data = sess->server;
1450
1451         return data->get_eap_user(data->conf_ctx, identity, identity_len,
1452                                   phase2, user);
1453 }
1454
1455
1456 static const char * radius_server_get_eap_req_id_text(void *ctx, size_t *len)
1457 {
1458         struct radius_session *sess = ctx;
1459         struct radius_server_data *data = sess->server;
1460         *len = data->eap_req_id_text_len;
1461         return data->eap_req_id_text;
1462 }
1463
1464
1465 static struct eapol_callbacks radius_server_eapol_cb =
1466 {
1467         .get_eap_user = radius_server_get_eap_user,
1468         .get_eap_req_id_text = radius_server_get_eap_req_id_text,
1469 };
1470
1471
1472 /**
1473  * radius_server_eap_pending_cb - Pending EAP data notification
1474  * @data: RADIUS server context from radius_server_init()
1475  * @ctx: Pending EAP context pointer
1476  *
1477  * This function is used to notify EAP server module that a pending operation
1478  * has been completed and processing of the EAP session can proceed.
1479  */
1480 void radius_server_eap_pending_cb(struct radius_server_data *data, void *ctx)
1481 {
1482         struct radius_client *cli;
1483         struct radius_session *s, *sess = NULL;
1484         struct radius_msg *msg;
1485
1486         if (data == NULL)
1487                 return;
1488
1489         for (cli = data->clients; cli; cli = cli->next) {
1490                 for (s = cli->sessions; s; s = s->next) {
1491                         if (s->eap == ctx && s->last_msg) {
1492                                 sess = s;
1493                                 break;
1494                         }
1495                         if (sess)
1496                                 break;
1497                 }
1498                 if (sess)
1499                         break;
1500         }
1501
1502         if (sess == NULL) {
1503                 RADIUS_DEBUG("No session matched callback ctx");
1504                 return;
1505         }
1506
1507         msg = sess->last_msg;
1508         sess->last_msg = NULL;
1509         eap_sm_pending_cb(sess->eap);
1510         if (radius_server_request(data, msg,
1511                                   (struct sockaddr *) &sess->last_from,
1512                                   sess->last_fromlen, cli,
1513                                   sess->last_from_addr,
1514                                   sess->last_from_port, sess) == -2)
1515                 return; /* msg was stored with the session */
1516
1517         radius_msg_free(msg);
1518 }