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