src/wps/wps.c

   1 /*
   2  * Wi-Fi Protected Setup
   3  * Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "crypto/dh_group5.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "wps_i.h"
  15 #include "wps_dev_attr.h"
  16
  17
  18 #ifdef CONFIG_WPS_TESTING
  19 int wps_version_number = 0x20;
  20 int wps_testing_dummy_cred = 0;
  21 #endif /* CONFIG_WPS_TESTING */
  22
  23
  24 /**
  25  * wps_init - Initialize WPS Registration protocol data
  26  * @cfg: WPS configuration
  27  * Returns: Pointer to allocated data or %NULL on failure
  28  *
  29  * This function is used to initialize WPS data for a registration protocol
  30  * instance (i.e., each run of registration protocol as a Registrar of
  31  * Enrollee. The caller is responsible for freeing this data after the
  32  * registration run has been completed by calling wps_deinit().
  33  */
  34 struct wps_data * wps_init(const struct wps_config *cfg)
  35 {
  36         struct wps_data *data = os_zalloc(sizeof(*data));
  37         if (data == NULL)
  38                 return NULL;
  39         data->wps = cfg->wps;
  40         data->registrar = cfg->registrar;
  41         if (cfg->registrar) {
  42                 os_memcpy(data->uuid_r, cfg->wps->uuid, WPS_UUID_LEN);
  43         } else {
  44                 os_memcpy(data->mac_addr_e, cfg->wps->dev.mac_addr, ETH_ALEN);
  45                 os_memcpy(data->uuid_e, cfg->wps->uuid, WPS_UUID_LEN);
  46         }
  47         if (cfg->pin) {
  48                 data->dev_pw_id = cfg->dev_pw_id;
  49                 data->dev_password = os_malloc(cfg->pin_len);
  50                 if (data->dev_password == NULL) {
  51                         os_free(data);
  52                         return NULL;
  53                 }
  54                 os_memcpy(data->dev_password, cfg->pin, cfg->pin_len);
  55                 data->dev_password_len = cfg->pin_len;
  56                 wpa_hexdump_key(MSG_DEBUG, "WPS: AP PIN dev_password",
  57                                 data->dev_password, data->dev_password_len);
  58         }
  59
  60 #ifdef CONFIG_WPS_NFC
  61         if (cfg->pin == NULL &&
  62             cfg->dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER)
  63                 data->dev_pw_id = cfg->dev_pw_id;
  64
  65         if (cfg->wps->ap && !cfg->registrar && cfg->wps->ap_nfc_dev_pw_id) {
  66                 /* Keep AP PIN as alternative Device Password */
  67                 data->alt_dev_pw_id = data->dev_pw_id;
  68                 data->alt_dev_password = data->dev_password;
  69                 data->alt_dev_password_len = data->dev_password_len;
  70
  71                 data->dev_pw_id = cfg->wps->ap_nfc_dev_pw_id;
  72                 data->dev_password =
  73                         os_malloc(wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  74                 if (data->dev_password == NULL) {
  75                         os_free(data);
  76                         return NULL;
  77                 }
  78                 os_memcpy(data->dev_password,
  79                           wpabuf_head(cfg->wps->ap_nfc_dev_pw),
  80                           wpabuf_len(cfg->wps->ap_nfc_dev_pw));
  81                 data->dev_password_len = wpabuf_len(cfg->wps->ap_nfc_dev_pw);
  82                 wpa_hexdump_key(MSG_DEBUG, "WPS: NFC dev_password",
  83                             data->dev_password, data->dev_password_len);
  84         }
  85 #endif /* CONFIG_WPS_NFC */
  86
  87         data->pbc = cfg->pbc;
  88         if (cfg->pbc) {
  89                 /* Use special PIN '00000000' for PBC */
  90                 data->dev_pw_id = DEV_PW_PUSHBUTTON;
  91                 os_free(data->dev_password);
  92                 data->dev_password = (u8 *) os_strdup("00000000");
  93                 if (data->dev_password == NULL) {
  94                         os_free(data);
  95                         return NULL;
  96                 }
  97                 data->dev_password_len = 8;
  98         }
  99
 100         data->state = data->registrar ? RECV_M1 : SEND_M1;
 101
 102         if (cfg->assoc_wps_ie) {
 103                 struct wps_parse_attr attr;
 104                 wpa_hexdump_buf(MSG_DEBUG, "WPS: WPS IE from (Re)AssocReq",
 105                                 cfg->assoc_wps_ie);
 106                 if (wps_parse_msg(cfg->assoc_wps_ie, &attr) < 0) {
 107                         wpa_printf(MSG_DEBUG, "WPS: Failed to parse WPS IE "
 108                                    "from (Re)AssocReq");
 109                 } else if (attr.request_type == NULL) {
 110                         wpa_printf(MSG_DEBUG, "WPS: No Request Type attribute "
 111                                    "in (Re)AssocReq WPS IE");
 112                 } else {
 113                         wpa_printf(MSG_DEBUG, "WPS: Request Type (from WPS IE "
 114                                    "in (Re)AssocReq WPS IE): %d",
 115                                    *attr.request_type);
 116                         data->request_type = *attr.request_type;
 117                 }
 118         }
 119
 120         if (cfg->new_ap_settings) {
 121                 data->new_ap_settings =
 122                         os_malloc(sizeof(*data->new_ap_settings));
 123                 if (data->new_ap_settings == NULL) {
 124                         os_free(data->dev_password);
 125                         os_free(data);
 126                         return NULL;
 127                 }
 128                 os_memcpy(data->new_ap_settings, cfg->new_ap_settings,
 129                           sizeof(*data->new_ap_settings));
 130         }
 131
 132         if (cfg->peer_addr)
 133                 os_memcpy(data->peer_dev.mac_addr, cfg->peer_addr, ETH_ALEN);
 134         if (cfg->p2p_dev_addr)
 135                 os_memcpy(data->p2p_dev_addr, cfg->p2p_dev_addr, ETH_ALEN);
 136
 137         data->use_psk_key = cfg->use_psk_key;
 138         data->pbc_in_m1 = cfg->pbc_in_m1;
 139
 140         if (cfg->peer_pubkey_hash) {
 141                 os_memcpy(data->peer_pubkey_hash, cfg->peer_pubkey_hash,
 142                           WPS_OOB_PUBKEY_HASH_LEN);
 143                 data->peer_pubkey_hash_set = 1;
 144         }
 145
 146         return data;
 147 }
 148
 149
 150 /**
 151  * wps_deinit - Deinitialize WPS Registration protocol data
 152  * @data: WPS Registration protocol data from wps_init()
 153  */
 154 void wps_deinit(struct wps_data *data)
 155 {
 156 #ifdef CONFIG_WPS_NFC
 157         if (data->registrar && data->nfc_pw_token)
 158                 wps_registrar_remove_nfc_pw_token(data->wps->registrar,
 159                                                   data->nfc_pw_token);
 160 #endif /* CONFIG_WPS_NFC */
 161
 162         if (data->wps_pin_revealed) {
 163                 wpa_printf(MSG_DEBUG, "WPS: Full PIN information revealed and "
 164                            "negotiation failed");
 165                 if (data->registrar)
 166                         wps_registrar_invalidate_pin(data->wps->registrar,
 167                                                      data->uuid_e);
 168         } else if (data->registrar)
 169                 wps_registrar_unlock_pin(data->wps->registrar, data->uuid_e);
 170
 171         wpabuf_free(data->dh_privkey);
 172         wpabuf_free(data->dh_pubkey_e);
 173         wpabuf_free(data->dh_pubkey_r);
 174         wpabuf_free(data->last_msg);
 175         os_free(data->dev_password);
 176         os_free(data->alt_dev_password);
 177         os_free(data->new_psk);
 178         wps_device_data_free(&data->peer_dev);
 179         os_free(data->new_ap_settings);
 180         dh5_free(data->dh_ctx);
 181         os_free(data);
 182 }
 183
 184
 185 /**
 186  * wps_process_msg - Process a WPS message
 187  * @wps: WPS Registration protocol data from wps_init()
 188  * @op_code: Message OP Code
 189  * @msg: Message data
 190  * Returns: Processing result
 191  *
 192  * This function is used to process WPS messages with OP Codes WSC_ACK,
 193  * WSC_NACK, WSC_MSG, and WSC_Done. The caller (e.g., EAP server/peer) is
 194  * responsible for reassembling the messages before calling this function.
 195  * Response to this message is built by calling wps_get_msg().
 196  */
 197 enum wps_process_res wps_process_msg(struct wps_data *wps,
 198                                      enum wsc_op_code op_code,
 199                                      const struct wpabuf *msg)
 200 {
 201         if (wps->registrar)
 202                 return wps_registrar_process_msg(wps, op_code, msg);
 203         else
 204                 return wps_enrollee_process_msg(wps, op_code, msg);
 205 }
 206
 207
 208 /**
 209  * wps_get_msg - Build a WPS message
 210  * @wps: WPS Registration protocol data from wps_init()
 211  * @op_code: Buffer for returning message OP Code
 212  * Returns: The generated WPS message or %NULL on failure
 213  *
 214  * This function is used to build a response to a message processed by calling
 215  * wps_process_msg(). The caller is responsible for freeing the buffer.
 216  */
 217 struct wpabuf * wps_get_msg(struct wps_data *wps, enum wsc_op_code *op_code)
 218 {
 219         if (wps->registrar)
 220                 return wps_registrar_get_msg(wps, op_code);
 221         else
 222                 return wps_enrollee_get_msg(wps, op_code);
 223 }
 224
 225
 226 /**
 227  * wps_is_selected_pbc_registrar - Check whether WPS IE indicates active PBC
 228  * @msg: WPS IE contents from Beacon or Probe Response frame
 229  * Returns: 1 if PBC Registrar is active, 0 if not
 230  */
 231 int wps_is_selected_pbc_registrar(const struct wpabuf *msg)
 232 {
 233         struct wps_parse_attr attr;
 234
 235         /*
 236          * In theory, this could also verify that attr.sel_reg_config_methods
 237          * includes WPS_CONFIG_PUSHBUTTON, but some deployed AP implementations
 238          * do not set Selected Registrar Config Methods attribute properly, so
 239          * it is safer to just use Device Password ID here.
 240          */
 241
 242         if (wps_parse_msg(msg, &attr) < 0 ||
 243             !attr.selected_registrar || *attr.selected_registrar == 0 ||
 244             !attr.dev_password_id ||
 245             WPA_GET_BE16(attr.dev_password_id) != DEV_PW_PUSHBUTTON)
 246                 return 0;
 247
 248 #ifdef CONFIG_WPS_STRICT
 249         if (!attr.sel_reg_config_methods ||
 250             !(WPA_GET_BE16(attr.sel_reg_config_methods) &
 251               WPS_CONFIG_PUSHBUTTON))
 252                 return 0;
 253 #endif /* CONFIG_WPS_STRICT */
 254
 255         return 1;
 256 }
 257
 258
 259 static int is_selected_pin_registrar(struct wps_parse_attr *attr)
 260 {
 261         /*
 262          * In theory, this could also verify that attr.sel_reg_config_methods
 263          * includes WPS_CONFIG_LABEL, WPS_CONFIG_DISPLAY, or WPS_CONFIG_KEYPAD,
 264          * but some deployed AP implementations do not set Selected Registrar
 265          * Config Methods attribute properly, so it is safer to just use
 266          * Device Password ID here.
 267          */
 268
 269         if (!attr->selected_registrar || *attr->selected_registrar == 0)
 270                 return 0;
 271
 272         if (attr->dev_password_id != NULL &&
 273             WPA_GET_BE16(attr->dev_password_id) == DEV_PW_PUSHBUTTON)
 274                 return 0;
 275
 276 #ifdef CONFIG_WPS_STRICT
 277         if (!attr->sel_reg_config_methods ||
 278             !(WPA_GET_BE16(attr->sel_reg_config_methods) &
 279               (WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD)))
 280                 return 0;
 281 #endif /* CONFIG_WPS_STRICT */
 282
 283         return 1;
 284 }
 285
 286
 287 /**
 288  * wps_is_selected_pin_registrar - Check whether WPS IE indicates active PIN
 289  * @msg: WPS IE contents from Beacon or Probe Response frame
 290  * Returns: 1 if PIN Registrar is active, 0 if not
 291  */
 292 int wps_is_selected_pin_registrar(const struct wpabuf *msg)
 293 {
 294         struct wps_parse_attr attr;
 295
 296         if (wps_parse_msg(msg, &attr) < 0)
 297                 return 0;
 298
 299         return is_selected_pin_registrar(&attr);
 300 }
 301
 302
 303 /**
 304  * wps_is_addr_authorized - Check whether WPS IE authorizes MAC address
 305  * @msg: WPS IE contents from Beacon or Probe Response frame
 306  * @addr: MAC address to search for
 307  * @ver1_compat: Whether to use version 1 compatibility mode
 308  * Returns: 2 if the specified address is explicit authorized, 1 if address is
 309  * authorized (broadcast), 0 if not
 310  */
 311 int wps_is_addr_authorized(const struct wpabuf *msg, const u8 *addr,
 312                            int ver1_compat)
 313 {
 314         struct wps_parse_attr attr;
 315         unsigned int i;
 316         const u8 *pos;
 317         const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 318
 319         if (wps_parse_msg(msg, &attr) < 0)
 320                 return 0;
 321
 322         if (!attr.version2 && ver1_compat) {
 323                 /*
 324                  * Version 1.0 AP - AuthorizedMACs not used, so revert back to
 325                  * old mechanism of using SelectedRegistrar.
 326                  */
 327                 return is_selected_pin_registrar(&attr);
 328         }
 329
 330         if (!attr.authorized_macs)
 331                 return 0;
 332
 333         pos = attr.authorized_macs;
 334         for (i = 0; i < attr.authorized_macs_len / ETH_ALEN; i++) {
 335                 if (os_memcmp(pos, addr, ETH_ALEN) == 0)
 336                         return 2;
 337                 if (os_memcmp(pos, bcast, ETH_ALEN) == 0)
 338                         return 1;
 339                 pos += ETH_ALEN;
 340         }
 341
 342         return 0;
 343 }
 344
 345
 346 /**
 347  * wps_ap_priority_compar - Prioritize WPS IE from two APs
 348  * @wps_a: WPS IE contents from Beacon or Probe Response frame
 349  * @wps_b: WPS IE contents from Beacon or Probe Response frame
 350  * Returns: 1 if wps_b is considered more likely selection for WPS
 351  * provisioning, -1 if wps_a is considered more like, or 0 if no preference
 352  */
 353 int wps_ap_priority_compar(const struct wpabuf *wps_a,
 354                            const struct wpabuf *wps_b)
 355 {
 356         struct wps_parse_attr attr_a, attr_b;
 357         int sel_a, sel_b;
 358
 359         if (wps_a == NULL || wps_parse_msg(wps_a, &attr_a) < 0)
 360                 return 1;
 361         if (wps_b == NULL || wps_parse_msg(wps_b, &attr_b) < 0)
 362                 return -1;
 363
 364         sel_a = attr_a.selected_registrar && *attr_a.selected_registrar != 0;
 365         sel_b = attr_b.selected_registrar && *attr_b.selected_registrar != 0;
 366
 367         if (sel_a && !sel_b)
 368                 return -1;
 369         if (!sel_a && sel_b)
 370                 return 1;
 371
 372         return 0;
 373 }
 374
 375
 376 /**
 377  * wps_get_uuid_e - Get UUID-E from WPS IE
 378  * @msg: WPS IE contents from Beacon or Probe Response frame
 379  * Returns: Pointer to UUID-E or %NULL if not included
 380  *
 381  * The returned pointer is to the msg contents and it remains valid only as
 382  * long as the msg buffer is valid.
 383  */
 384 const u8 * wps_get_uuid_e(const struct wpabuf *msg)
 385 {
 386         struct wps_parse_attr attr;
 387
 388         if (wps_parse_msg(msg, &attr) < 0)
 389                 return NULL;
 390         return attr.uuid_e;
 391 }
 392
 393
 394 /**
 395  * wps_is_20 - Check whether WPS attributes claim support for WPS 2.0
 396  */
 397 int wps_is_20(const struct wpabuf *msg)
 398 {
 399         struct wps_parse_attr attr;
 400
 401         if (msg == NULL || wps_parse_msg(msg, &attr) < 0)
 402                 return 0;
 403         return attr.version2 != NULL;
 404 }
 405
 406
 407 /**
 408  * wps_build_assoc_req_ie - Build WPS IE for (Re)Association Request
 409  * @req_type: Value for Request Type attribute
 410  * Returns: WPS IE or %NULL on failure
 411  *
 412  * The caller is responsible for freeing the buffer.
 413  */
 414 struct wpabuf * wps_build_assoc_req_ie(enum wps_request_type req_type)
 415 {
 416         struct wpabuf *ie;
 417         u8 *len;
 418
 419         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 420                    "Request");
 421         ie = wpabuf_alloc(100);
 422         if (ie == NULL)
 423                 return NULL;
 424
 425         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 426         len = wpabuf_put(ie, 1);
 427         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 428
 429         if (wps_build_version(ie) ||
 430             wps_build_req_type(ie, req_type) ||
 431             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 432                 wpabuf_free(ie);
 433                 return NULL;
 434         }
 435
 436         *len = wpabuf_len(ie) - 2;
 437
 438         return ie;
 439 }
 440
 441
 442 /**
 443  * wps_build_assoc_resp_ie - Build WPS IE for (Re)Association Response
 444  * Returns: WPS IE or %NULL on failure
 445  *
 446  * The caller is responsible for freeing the buffer.
 447  */
 448 struct wpabuf * wps_build_assoc_resp_ie(void)
 449 {
 450         struct wpabuf *ie;
 451         u8 *len;
 452
 453         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for (Re)Association "
 454                    "Response");
 455         ie = wpabuf_alloc(100);
 456         if (ie == NULL)
 457                 return NULL;
 458
 459         wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
 460         len = wpabuf_put(ie, 1);
 461         wpabuf_put_be32(ie, WPS_DEV_OUI_WFA);
 462
 463         if (wps_build_version(ie) ||
 464             wps_build_resp_type(ie, WPS_RESP_AP) ||
 465             wps_build_wfa_ext(ie, 0, NULL, 0)) {
 466                 wpabuf_free(ie);
 467                 return NULL;
 468         }
 469
 470         *len = wpabuf_len(ie) - 2;
 471
 472         return ie;
 473 }
 474
 475
 476 /**
 477  * wps_build_probe_req_ie - Build WPS IE for Probe Request
 478  * @pw_id: Password ID (DEV_PW_PUSHBUTTON for active PBC and DEV_PW_DEFAULT for
 479  * most other use cases)
 480  * @dev: Device attributes
 481  * @uuid: Own UUID
 482  * @req_type: Value for Request Type attribute
 483  * @num_req_dev_types: Number of requested device types
 484  * @req_dev_types: Requested device types (8 * num_req_dev_types octets) or
 485  *      %NULL if none
 486  * Returns: WPS IE or %NULL on failure
 487  *
 488  * The caller is responsible for freeing the buffer.
 489  */
 490 struct wpabuf * wps_build_probe_req_ie(u16 pw_id, struct wps_device_data *dev,
 491                                        const u8 *uuid,
 492                                        enum wps_request_type req_type,
 493                                        unsigned int num_req_dev_types,
 494                                        const u8 *req_dev_types)
 495 {
 496         struct wpabuf *ie;
 497
 498         wpa_printf(MSG_DEBUG, "WPS: Building WPS IE for Probe Request");
 499
 500         ie = wpabuf_alloc(500);
 501         if (ie == NULL)
 502                 return NULL;
 503
 504         if (wps_build_version(ie) ||
 505             wps_build_req_type(ie, req_type) ||
 506             wps_build_config_methods(ie, dev->config_methods) ||
 507             wps_build_uuid_e(ie, uuid) ||
 508             wps_build_primary_dev_type(dev, ie) ||
 509             wps_build_rf_bands(dev, ie, 0) ||
 510             wps_build_assoc_state(NULL, ie) ||
 511             wps_build_config_error(ie, WPS_CFG_NO_ERROR) ||
 512             wps_build_dev_password_id(ie, pw_id) ||
 513 #ifdef CONFIG_WPS2
 514             wps_build_manufacturer(dev, ie) ||
 515             wps_build_model_name(dev, ie) ||
 516             wps_build_model_number(dev, ie) ||
 517             wps_build_dev_name(dev, ie) ||
 518             wps_build_wfa_ext(ie, req_type == WPS_REQ_ENROLLEE, NULL, 0) ||
 519 #endif /* CONFIG_WPS2 */
 520             wps_build_req_dev_type(dev, ie, num_req_dev_types, req_dev_types)
 521             ||
 522             wps_build_secondary_dev_type(dev, ie)
 523                 ) {
 524                 wpabuf_free(ie);
 525                 return NULL;
 526         }
 527
 528 #ifndef CONFIG_WPS2
 529         if (dev->p2p && wps_build_dev_name(dev, ie)) {
 530                 wpabuf_free(ie);
 531                 return NULL;
 532         }
 533 #endif /* CONFIG_WPS2 */
 534
 535         return wps_ie_encapsulate(ie);
 536 }
 537
 538
 539 void wps_free_pending_msgs(struct upnp_pending_message *msgs)
 540 {
 541         struct upnp_pending_message *p, *prev;
 542         p = msgs;
 543         while (p) {
 544                 prev = p;
 545                 p = p->next;
 546                 wpabuf_free(prev->msg);
 547                 os_free(prev);
 548         }
 549 }
 550
 551
 552 int wps_attr_text(struct wpabuf *data, char *buf, char *end)
 553 {
 554         struct wps_parse_attr attr;
 555         char *pos = buf;
 556         int ret;
 557
 558         if (wps_parse_msg(data, &attr) < 0)
 559                 return -1;
 560
 561         if (attr.wps_state) {
 562                 if (*attr.wps_state == WPS_STATE_NOT_CONFIGURED)
 563                         ret = os_snprintf(pos, end - pos,
 564                                           "wps_state=unconfigured\n");
 565                 else if (*attr.wps_state == WPS_STATE_CONFIGURED)
 566                         ret = os_snprintf(pos, end - pos,
 567                                           "wps_state=configured\n");
 568                 else
 569                         ret = 0;
 570                 if (ret < 0 || ret >= end - pos)
 571                         return pos - buf;
 572                 pos += ret;
 573         }
 574
 575         if (attr.ap_setup_locked && *attr.ap_setup_locked) {
 576                 ret = os_snprintf(pos, end - pos,
 577                                   "wps_ap_setup_locked=1\n");
 578                 if (ret < 0 || ret >= end - pos)
 579                         return pos - buf;
 580                 pos += ret;
 581         }
 582
 583         if (attr.selected_registrar && *attr.selected_registrar) {
 584                 ret = os_snprintf(pos, end - pos,
 585                                   "wps_selected_registrar=1\n");
 586                 if (ret < 0 || ret >= end - pos)
 587                         return pos - buf;
 588                 pos += ret;
 589         }
 590
 591         if (attr.dev_password_id) {
 592                 ret = os_snprintf(pos, end - pos,
 593                                   "wps_device_password_id=%u\n",
 594                                   WPA_GET_BE16(attr.dev_password_id));
 595                 if (ret < 0 || ret >= end - pos)
 596                         return pos - buf;
 597                 pos += ret;
 598         }
 599
 600         if (attr.sel_reg_config_methods) {
 601                 ret = os_snprintf(pos, end - pos,
 602                                   "wps_selected_registrar_config_methods="
 603                                   "0x%04x\n",
 604                                   WPA_GET_BE16(attr.sel_reg_config_methods));
 605                 if (ret < 0 || ret >= end - pos)
 606                         return pos - buf;
 607                 pos += ret;
 608         }
 609
 610         if (attr.primary_dev_type) {
 611                 char devtype[WPS_DEV_TYPE_BUFSIZE];
 612                 ret = os_snprintf(pos, end - pos,
 613                                   "wps_primary_device_type=%s\n",
 614                                   wps_dev_type_bin2str(attr.primary_dev_type,
 615                                                        devtype,
 616                                                        sizeof(devtype)));
 617                 if (ret < 0 || ret >= end - pos)
 618                         return pos - buf;
 619                 pos += ret;
 620         }
 621
 622         if (attr.dev_name) {
 623                 char *str = os_malloc(attr.dev_name_len + 1);
 624                 size_t i;
 625                 if (str == NULL)
 626                         return pos - buf;
 627                 for (i = 0; i < attr.dev_name_len; i++) {
 628                         if (attr.dev_name[i] < 32)
 629                                 str[i] = '_';
 630                         else
 631                                 str[i] = attr.dev_name[i];
 632                 }
 633                 str[i] = '\0';
 634                 ret = os_snprintf(pos, end - pos, "wps_device_name=%s\n", str);
 635                 os_free(str);
 636                 if (ret < 0 || ret >= end - pos)
 637                         return pos - buf;
 638                 pos += ret;
 639         }
 640
 641         if (attr.config_methods) {
 642                 ret = os_snprintf(pos, end - pos,
 643                                   "wps_config_methods=0x%04x\n",
 644                                   WPA_GET_BE16(attr.config_methods));
 645                 if (ret < 0 || ret >= end - pos)
 646                         return pos - buf;
 647                 pos += ret;
 648         }
 649
 650         return pos - buf;
 651 }
 652
 653
 654 const char * wps_ei_str(enum wps_error_indication ei)
 655 {
 656         switch (ei) {
 657         case WPS_EI_NO_ERROR:
 658                 return "No Error";
 659         case WPS_EI_SECURITY_TKIP_ONLY_PROHIBITED:
 660                 return "TKIP Only Prohibited";
 661         case WPS_EI_SECURITY_WEP_PROHIBITED:
 662                 return "WEP Prohibited";
 663         case WPS_EI_AUTH_FAILURE:
 664                 return "Authentication Failure";
 665         default:
 666                 return "Unknown";
 667         }
 668 }