wpa_supplicant/hs20_supplicant.c

   1 /*
   2  * Copyright (c) 2009, Atheros Communications, Inc.
   3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
   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 "eloop.h"
  13 #include "common/ieee802_11_common.h"
  14 #include "common/ieee802_11_defs.h"
  15 #include "common/gas.h"
  16 #include "common/wpa_ctrl.h"
  17 #include "rsn_supp/wpa.h"
  18 #include "wpa_supplicant_i.h"
  19 #include "driver_i.h"
  20 #include "config.h"
  21 #include "scan.h"
  22 #include "bss.h"
  23 #include "blacklist.h"
  24 #include "gas_query.h"
  25 #include "interworking.h"
  26 #include "hs20_supplicant.h"
  27
  28
  29 #define OSU_MAX_ITEMS 10
  30
  31 struct osu_lang_string {
  32         char lang[4];
  33         char text[253];
  34 };
  35
  36 struct osu_icon {
  37         u16 width;
  38         u16 height;
  39         char lang[4];
  40         char icon_type[256];
  41         char filename[256];
  42         unsigned int id;
  43         unsigned int failed:1;
  44 };
  45
  46 struct osu_provider {
  47         u8 bssid[ETH_ALEN];
  48         u8 osu_ssid[32];
  49         u8 osu_ssid_len;
  50         char server_uri[256];
  51         u32 osu_methods; /* bit 0 = OMA-DM, bit 1 = SOAP-XML SPP */
  52         char osu_nai[256];
  53         struct osu_lang_string friendly_name[OSU_MAX_ITEMS];
  54         size_t friendly_name_count;
  55         struct osu_lang_string serv_desc[OSU_MAX_ITEMS];
  56         size_t serv_desc_count;
  57         struct osu_icon icon[OSU_MAX_ITEMS];
  58         size_t icon_count;
  59 };
  60
  61
  62 void wpas_hs20_add_indication(struct wpabuf *buf, int pps_mo_id)
  63 {
  64         u8 conf;
  65
  66         wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
  67         wpabuf_put_u8(buf, pps_mo_id >= 0 ? 7 : 5);
  68         wpabuf_put_be24(buf, OUI_WFA);
  69         wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
  70         conf = HS20_VERSION;
  71         if (pps_mo_id >= 0)
  72                 conf |= HS20_PPS_MO_ID_PRESENT;
  73         wpabuf_put_u8(buf, conf);
  74         if (pps_mo_id >= 0)
  75                 wpabuf_put_le16(buf, pps_mo_id);
  76 }
  77
  78
  79 int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
  80                     struct wpa_bss *bss)
  81 {
  82         if (!wpa_s->conf->hs20 || !ssid)
  83                 return 0;
  84
  85         if (ssid->parent_cred)
  86                 return 1;
  87
  88         if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
  89                 return 0;
  90
  91         /*
  92          * This may catch some non-Hotspot 2.0 cases, but it is safer to do that
  93          * than cause Hotspot 2.0 connections without indication element getting
  94          * added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
  95          */
  96
  97         if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
  98                 return 0;
  99         if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
 100                 return 0;
 101         if (ssid->proto != WPA_PROTO_RSN)
 102                 return 0;
 103
 104         return 1;
 105 }
 106
 107
 108 int hs20_get_pps_mo_id(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 109 {
 110         struct wpa_cred *cred;
 111
 112         if (ssid == NULL || ssid->parent_cred == NULL)
 113                 return 0;
 114
 115         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 116                 if (ssid->parent_cred == cred)
 117                         return cred->update_identifier;
 118         }
 119
 120         return 0;
 121 }
 122
 123
 124 struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
 125                                     size_t payload_len)
 126 {
 127         struct wpabuf *buf;
 128         u8 *len_pos;
 129
 130         buf = gas_anqp_build_initial_req(0, 100 + payload_len);
 131         if (buf == NULL)
 132                 return NULL;
 133
 134         len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
 135         wpabuf_put_be24(buf, OUI_WFA);
 136         wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
 137         if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
 138                 wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
 139                 wpabuf_put_u8(buf, 0); /* Reserved */
 140                 if (payload)
 141                         wpabuf_put_data(buf, payload, payload_len);
 142         } else if (stypes == BIT(HS20_STYPE_ICON_REQUEST)) {
 143                 wpabuf_put_u8(buf, HS20_STYPE_ICON_REQUEST);
 144                 wpabuf_put_u8(buf, 0); /* Reserved */
 145                 if (payload)
 146                         wpabuf_put_data(buf, payload, payload_len);
 147         } else {
 148                 u8 i;
 149                 wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
 150                 wpabuf_put_u8(buf, 0); /* Reserved */
 151                 for (i = 0; i < 32; i++) {
 152                         if (stypes & BIT(i))
 153                                 wpabuf_put_u8(buf, i);
 154                 }
 155         }
 156         gas_anqp_set_element_len(buf, len_pos);
 157
 158         gas_anqp_set_len(buf);
 159
 160         return buf;
 161 }
 162
 163
 164 int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
 165                        const u8 *payload, size_t payload_len)
 166 {
 167         struct wpabuf *buf;
 168         int ret = 0;
 169         int freq;
 170         struct wpa_bss *bss;
 171         int res;
 172
 173         freq = wpa_s->assoc_freq;
 174         bss = wpa_bss_get_bssid(wpa_s, dst);
 175         if (bss) {
 176                 wpa_bss_anqp_unshare_alloc(bss);
 177                 freq = bss->freq;
 178         }
 179         if (freq <= 0)
 180                 return -1;
 181
 182         wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
 183                    "subtypes 0x%x", MAC2STR(dst), stypes);
 184
 185         buf = hs20_build_anqp_req(stypes, payload, payload_len);
 186         if (buf == NULL)
 187                 return -1;
 188
 189         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
 190         if (res < 0) {
 191                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 192                 wpabuf_free(buf);
 193                 ret = -1;
 194         } else
 195                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 196                            "%u", res);
 197
 198         return ret;
 199 }
 200
 201
 202 static int hs20_process_icon_binary_file(struct wpa_supplicant *wpa_s,
 203                                          const u8 *sa, const u8 *pos,
 204                                          size_t slen)
 205 {
 206         char fname[256];
 207         int png;
 208         FILE *f;
 209         u16 data_len;
 210
 211         wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR " Icon Binary File",
 212                 MAC2STR(sa));
 213
 214         if (slen < 4) {
 215                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 216                         "value from " MACSTR, MAC2STR(sa));
 217                 return -1;
 218         }
 219
 220         wpa_printf(MSG_DEBUG, "HS 2.0: Download Status Code %u", *pos);
 221         if (*pos != 0)
 222                 return -1;
 223         pos++;
 224         slen--;
 225
 226         if ((size_t) 1 + pos[0] > slen) {
 227                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 228                         "value from " MACSTR, MAC2STR(sa));
 229                 return -1;
 230         }
 231         wpa_hexdump_ascii(MSG_DEBUG, "Icon Type", pos + 1, pos[0]);
 232         png = os_strncasecmp((char *) pos + 1, "image/png", 9) == 0;
 233         slen -= 1 + pos[0];
 234         pos += 1 + pos[0];
 235
 236         if (slen < 2) {
 237                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 238                         "value from " MACSTR, MAC2STR(sa));
 239                 return -1;
 240         }
 241         data_len = WPA_GET_LE16(pos);
 242         pos += 2;
 243         slen -= 2;
 244
 245         if (data_len > slen) {
 246                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 247                         "value from " MACSTR, MAC2STR(sa));
 248                 return -1;
 249         }
 250
 251         wpa_printf(MSG_DEBUG, "Icon Binary Data: %u bytes", data_len);
 252         if (wpa_s->conf->osu_dir == NULL)
 253                 return -1;
 254
 255         wpa_s->osu_icon_id++;
 256         if (wpa_s->osu_icon_id == 0)
 257                 wpa_s->osu_icon_id++;
 258         snprintf(fname, sizeof(fname), "%s/osu-icon-%u.%s",
 259                  wpa_s->conf->osu_dir, wpa_s->osu_icon_id,
 260                  png ? "png" : "icon");
 261         f = fopen(fname, "wb");
 262         if (f == NULL)
 263                 return -1;
 264         if (fwrite(pos, slen, 1, f) != 1) {
 265                 fclose(f);
 266                 unlink(fname);
 267                 return -1;
 268         }
 269         fclose(f);
 270
 271         wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP-ICON %s", fname);
 272         return 0;
 273 }
 274
 275
 276 static void hs20_continue_icon_fetch(void *eloop_ctx, void *sock_ctx)
 277 {
 278         struct wpa_supplicant *wpa_s = eloop_ctx;
 279         if (wpa_s->fetch_osu_icon_in_progress)
 280                 hs20_next_osu_icon(wpa_s);
 281 }
 282
 283
 284 static void hs20_osu_icon_fetch_result(struct wpa_supplicant *wpa_s, int res)
 285 {
 286         size_t i, j;
 287         struct os_reltime now, tmp;
 288         int dur;
 289
 290         os_get_reltime(&now);
 291         os_reltime_sub(&now, &wpa_s->osu_icon_fetch_start, &tmp);
 292         dur = tmp.sec * 1000 + tmp.usec / 1000;
 293         wpa_printf(MSG_DEBUG, "HS 2.0: Icon fetch dur=%d ms res=%d",
 294                    dur, res);
 295
 296         for (i = 0; i < wpa_s->osu_prov_count; i++) {
 297                 struct osu_provider *osu = &wpa_s->osu_prov[i];
 298                 for (j = 0; j < osu->icon_count; j++) {
 299                         struct osu_icon *icon = &osu->icon[j];
 300                         if (icon->id || icon->failed)
 301                                 continue;
 302                         if (res < 0)
 303                                 icon->failed = 1;
 304                         else
 305                                 icon->id = wpa_s->osu_icon_id;
 306                         return;
 307                 }
 308         }
 309 }
 310
 311
 312 void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
 313                                   const u8 *sa, const u8 *data, size_t slen)
 314 {
 315         const u8 *pos = data;
 316         u8 subtype;
 317         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
 318         struct wpa_bss_anqp *anqp = NULL;
 319         int ret;
 320
 321         if (slen < 2)
 322                 return;
 323
 324         if (bss)
 325                 anqp = bss->anqp;
 326
 327         subtype = *pos++;
 328         slen--;
 329
 330         pos++; /* Reserved */
 331         slen--;
 332
 333         switch (subtype) {
 334         case HS20_STYPE_CAPABILITY_LIST:
 335                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 336                         " HS Capability List", MAC2STR(sa));
 337                 wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
 338                 break;
 339         case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
 340                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 341                         " Operator Friendly Name", MAC2STR(sa));
 342                 wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
 343                 if (anqp) {
 344                         wpabuf_free(anqp->hs20_operator_friendly_name);
 345                         anqp->hs20_operator_friendly_name =
 346                                 wpabuf_alloc_copy(pos, slen);
 347                 }
 348                 break;
 349         case HS20_STYPE_WAN_METRICS:
 350                 wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
 351                 if (slen < 13) {
 352                         wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
 353                                 "Metrics value from " MACSTR, MAC2STR(sa));
 354                         break;
 355                 }
 356                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 357                         " WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
 358                         pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
 359                         pos[9], pos[10], WPA_GET_LE16(pos + 11));
 360                 if (anqp) {
 361                         wpabuf_free(anqp->hs20_wan_metrics);
 362                         anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
 363                 }
 364                 break;
 365         case HS20_STYPE_CONNECTION_CAPABILITY:
 366                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 367                         " Connection Capability", MAC2STR(sa));
 368                 wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
 369                 if (anqp) {
 370                         wpabuf_free(anqp->hs20_connection_capability);
 371                         anqp->hs20_connection_capability =
 372                                 wpabuf_alloc_copy(pos, slen);
 373                 }
 374                 break;
 375         case HS20_STYPE_OPERATING_CLASS:
 376                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 377                         " Operating Class", MAC2STR(sa));
 378                 wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
 379                 if (anqp) {
 380                         wpabuf_free(anqp->hs20_operating_class);
 381                         anqp->hs20_operating_class =
 382                                 wpabuf_alloc_copy(pos, slen);
 383                 }
 384                 break;
 385         case HS20_STYPE_OSU_PROVIDERS_LIST:
 386                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 387                         " OSU Providers list", MAC2STR(sa));
 388                 if (anqp) {
 389                         wpabuf_free(anqp->hs20_osu_providers_list);
 390                         anqp->hs20_osu_providers_list =
 391                                 wpabuf_alloc_copy(pos, slen);
 392                 }
 393                 break;
 394         case HS20_STYPE_ICON_BINARY_FILE:
 395                 ret = hs20_process_icon_binary_file(wpa_s, sa, pos, slen);
 396                 if (wpa_s->fetch_osu_icon_in_progress) {
 397                         hs20_osu_icon_fetch_result(wpa_s, ret);
 398                         eloop_cancel_timeout(hs20_continue_icon_fetch,
 399                                              wpa_s, NULL);
 400                         eloop_register_timeout(0, 0, hs20_continue_icon_fetch,
 401                                                wpa_s, NULL);
 402                 }
 403                 break;
 404         default:
 405                 wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
 406                 break;
 407         }
 408 }
 409
 410
 411 void hs20_notify_parse_done(struct wpa_supplicant *wpa_s)
 412 {
 413         if (!wpa_s->fetch_osu_icon_in_progress)
 414                 return;
 415         if (eloop_is_timeout_registered(hs20_continue_icon_fetch, wpa_s, NULL))
 416                 return;
 417         /*
 418          * We are going through icon fetch, but no icon response was received.
 419          * Assume this means the current AP could not provide an answer to avoid
 420          * getting stuck in fetch iteration.
 421          */
 422         hs20_icon_fetch_failed(wpa_s);
 423 }
 424
 425
 426 static void hs20_free_osu_prov_entry(struct osu_provider *prov)
 427 {
 428 }
 429
 430
 431 void hs20_free_osu_prov(struct wpa_supplicant *wpa_s)
 432 {
 433         size_t i;
 434         for (i = 0; i < wpa_s->osu_prov_count; i++)
 435                 hs20_free_osu_prov_entry(&wpa_s->osu_prov[i]);
 436         os_free(wpa_s->osu_prov);
 437         wpa_s->osu_prov = NULL;
 438         wpa_s->osu_prov_count = 0;
 439 }
 440
 441
 442 static void hs20_osu_fetch_done(struct wpa_supplicant *wpa_s)
 443 {
 444         char fname[256];
 445         FILE *f;
 446         size_t i, j;
 447
 448         wpa_s->fetch_osu_info = 0;
 449         wpa_s->fetch_osu_icon_in_progress = 0;
 450
 451         if (wpa_s->conf->osu_dir == NULL) {
 452                 hs20_free_osu_prov(wpa_s);
 453                 wpa_s->fetch_anqp_in_progress = 0;
 454                 return;
 455         }
 456
 457         snprintf(fname, sizeof(fname), "%s/osu-providers.txt",
 458                  wpa_s->conf->osu_dir);
 459         f = fopen(fname, "w");
 460         if (f == NULL) {
 461                 hs20_free_osu_prov(wpa_s);
 462                 return;
 463         }
 464         for (i = 0; i < wpa_s->osu_prov_count; i++) {
 465                 struct osu_provider *osu = &wpa_s->osu_prov[i];
 466                 if (i > 0)
 467                         fprintf(f, "\n");
 468                 fprintf(f, "OSU-PROVIDER " MACSTR "\n"
 469                         "uri=%s\n"
 470                         "methods=%08x\n",
 471                         MAC2STR(osu->bssid), osu->server_uri, osu->osu_methods);
 472                 if (osu->osu_ssid_len) {
 473                         fprintf(f, "osu_ssid=%s\n",
 474                                 wpa_ssid_txt(osu->osu_ssid,
 475                                              osu->osu_ssid_len));
 476                 }
 477                 if (osu->osu_nai[0])
 478                         fprintf(f, "osu_nai=%s\n", osu->osu_nai);
 479                 for (j = 0; j < osu->friendly_name_count; j++) {
 480                         fprintf(f, "friendly_name=%s:%s\n",
 481                                 osu->friendly_name[j].lang,
 482                                 osu->friendly_name[j].text);
 483                 }
 484                 for (j = 0; j < osu->serv_desc_count; j++) {
 485                         fprintf(f, "desc=%s:%s\n",
 486                                 osu->serv_desc[j].lang,
 487                                 osu->serv_desc[j].text);
 488                 }
 489                 for (j = 0; j < osu->icon_count; j++) {
 490                         struct osu_icon *icon = &osu->icon[j];
 491                         if (icon->failed)
 492                                 continue; /* could not fetch icon */
 493                         fprintf(f, "icon=%u:%u:%u:%s:%s:%s\n",
 494                                 icon->id, icon->width, icon->height, icon->lang,
 495                                 icon->icon_type, icon->filename);
 496                 }
 497         }
 498         fclose(f);
 499         hs20_free_osu_prov(wpa_s);
 500
 501         wpa_msg(wpa_s, MSG_INFO, "OSU provider fetch completed");
 502         wpa_s->fetch_anqp_in_progress = 0;
 503 }
 504
 505
 506 void hs20_next_osu_icon(struct wpa_supplicant *wpa_s)
 507 {
 508         size_t i, j;
 509
 510         wpa_printf(MSG_DEBUG, "HS 2.0: Ready to fetch next icon");
 511
 512         for (i = 0; i < wpa_s->osu_prov_count; i++) {
 513                 struct osu_provider *osu = &wpa_s->osu_prov[i];
 514                 for (j = 0; j < osu->icon_count; j++) {
 515                         struct osu_icon *icon = &osu->icon[j];
 516                         if (icon->id || icon->failed)
 517                                 continue;
 518
 519                         wpa_printf(MSG_DEBUG, "HS 2.0: Try to fetch icon '%s' "
 520                                    "from " MACSTR, icon->filename,
 521                                    MAC2STR(osu->bssid));
 522                         os_get_reltime(&wpa_s->osu_icon_fetch_start);
 523                         if (hs20_anqp_send_req(wpa_s, osu->bssid,
 524                                                BIT(HS20_STYPE_ICON_REQUEST),
 525                                                (u8 *) icon->filename,
 526                                                os_strlen(icon->filename)) < 0) {
 527                                 icon->failed = 1;
 528                                 continue;
 529                         }
 530                         return;
 531                 }
 532         }
 533
 534         wpa_printf(MSG_DEBUG, "HS 2.0: No more icons to fetch");
 535         hs20_osu_fetch_done(wpa_s);
 536 }
 537
 538
 539 static void hs20_osu_add_prov(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
 540                               const u8 *osu_ssid, u8 osu_ssid_len,
 541                               const u8 *pos, size_t len)
 542 {
 543         struct osu_provider *prov;
 544         const u8 *end = pos + len;
 545         u16 len2;
 546         const u8 *pos2;
 547
 548         wpa_hexdump(MSG_DEBUG, "HS 2.0: Parsing OSU Provider", pos, len);
 549         prov = os_realloc_array(wpa_s->osu_prov,
 550                                 wpa_s->osu_prov_count + 1,
 551                                 sizeof(*prov));
 552         if (prov == NULL)
 553                 return;
 554         wpa_s->osu_prov = prov;
 555         prov = &prov[wpa_s->osu_prov_count];
 556         os_memset(prov, 0, sizeof(*prov));
 557
 558         os_memcpy(prov->bssid, bss->bssid, ETH_ALEN);
 559         os_memcpy(prov->osu_ssid, osu_ssid, osu_ssid_len);
 560         prov->osu_ssid_len = osu_ssid_len;
 561
 562         /* OSU Friendly Name Length */
 563         if (pos + 2 > end) {
 564                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 565                            "Friendly Name Length");
 566                 return;
 567         }
 568         len2 = WPA_GET_LE16(pos);
 569         pos += 2;
 570         if (pos + len2 > end) {
 571                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 572                            "Friendly Name Duples");
 573                 return;
 574         }
 575         pos2 = pos;
 576         pos += len2;
 577
 578         /* OSU Friendly Name Duples */
 579         while (pos2 + 4 <= pos && prov->friendly_name_count < OSU_MAX_ITEMS) {
 580                 struct osu_lang_string *f;
 581                 if (pos2 + 1 + pos2[0] > pos || pos2[0] < 3) {
 582                         wpa_printf(MSG_DEBUG, "Invalid OSU Friendly Name");
 583                         break;
 584                 }
 585                 f = &prov->friendly_name[prov->friendly_name_count++];
 586                 os_memcpy(f->lang, pos2 + 1, 3);
 587                 os_memcpy(f->text, pos2 + 1 + 3, pos2[0] - 3);
 588                 pos2 += 1 + pos2[0];
 589         }
 590
 591         /* OSU Server URI */
 592         if (pos + 1 > end || pos + 1 + pos[0] > end) {
 593                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Server "
 594                            "URI");
 595                 return;
 596         }
 597         os_memcpy(prov->server_uri, pos + 1, pos[0]);
 598         pos += 1 + pos[0];
 599
 600         /* OSU Method list */
 601         if (pos + 1 > end || pos + 1 + pos[0] > end) {
 602                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Method "
 603                            "list");
 604                 return;
 605         }
 606         pos2 = pos + 1;
 607         pos += 1 + pos[0];
 608         while (pos2 < pos) {
 609                 if (*pos2 < 32)
 610                         prov->osu_methods |= BIT(*pos2);
 611                 pos2++;
 612         }
 613
 614         /* Icons Available Length */
 615         if (pos + 2 > end) {
 616                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for Icons "
 617                            "Available Length");
 618                 return;
 619         }
 620         len2 = WPA_GET_LE16(pos);
 621         pos += 2;
 622         if (pos + len2 > end) {
 623                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for Icons "
 624                            "Available");
 625                 return;
 626         }
 627         pos2 = pos;
 628         pos += len2;
 629
 630         /* Icons Available */
 631         while (pos2 < pos) {
 632                 struct osu_icon *icon = &prov->icon[prov->icon_count];
 633                 if (pos2 + 2 + 2 + 3 + 1 + 1 > pos) {
 634                         wpa_printf(MSG_DEBUG, "HS 2.0: Invalid Icon Metadata");
 635                         break;
 636                 }
 637
 638                 icon->width = WPA_GET_LE16(pos2);
 639                 pos2 += 2;
 640                 icon->height = WPA_GET_LE16(pos2);
 641                 pos2 += 2;
 642                 os_memcpy(icon->lang, pos2, 3);
 643                 pos2 += 3;
 644
 645                 if (pos2 + 1 + pos2[0] > pos) {
 646                         wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon Type");
 647                         break;
 648                 }
 649                 os_memcpy(icon->icon_type, pos2 + 1, pos2[0]);
 650                 pos2 += 1 + pos2[0];
 651
 652                 if (pos2 + 1 + pos2[0] > pos) {
 653                         wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon "
 654                                    "Filename");
 655                         break;
 656                 }
 657                 os_memcpy(icon->filename, pos2 + 1, pos2[0]);
 658                 pos2 += 1 + pos2[0];
 659
 660                 prov->icon_count++;
 661         }
 662
 663         /* OSU_NAI */
 664         if (pos + 1 > end || pos + 1 + pos[0] > end) {
 665                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU_NAI");
 666                 return;
 667         }
 668         os_memcpy(prov->osu_nai, pos + 1, pos[0]);
 669         pos += 1 + pos[0];
 670
 671         /* OSU Service Description Length */
 672         if (pos + 2 > end) {
 673                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 674                            "Service Description Length");
 675                 return;
 676         }
 677         len2 = WPA_GET_LE16(pos);
 678         pos += 2;
 679         if (pos + len2 > end) {
 680                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 681                            "Service Description Duples");
 682                 return;
 683         }
 684         pos2 = pos;
 685         pos += len2;
 686
 687         /* OSU Service Description Duples */
 688         while (pos2 + 4 <= pos && prov->serv_desc_count < OSU_MAX_ITEMS) {
 689                 struct osu_lang_string *f;
 690                 if (pos2 + 1 + pos2[0] > pos || pos2[0] < 3) {
 691                         wpa_printf(MSG_DEBUG, "Invalid OSU Service "
 692                                    "Description");
 693                         break;
 694                 }
 695                 f = &prov->serv_desc[prov->serv_desc_count++];
 696                 os_memcpy(f->lang, pos2 + 1, 3);
 697                 os_memcpy(f->text, pos2 + 1 + 3, pos2[0] - 3);
 698                 pos2 += 1 + pos2[0];
 699         }
 700
 701         wpa_printf(MSG_DEBUG, "HS 2.0: Added OSU Provider through " MACSTR,
 702                    MAC2STR(bss->bssid));
 703         wpa_s->osu_prov_count++;
 704 }
 705
 706
 707 void hs20_osu_icon_fetch(struct wpa_supplicant *wpa_s)
 708 {
 709         struct wpa_bss *bss;
 710         struct wpabuf *prov_anqp;
 711         const u8 *pos, *end;
 712         u16 len;
 713         const u8 *osu_ssid;
 714         u8 osu_ssid_len;
 715         u8 num_providers;
 716
 717         hs20_free_osu_prov(wpa_s);
 718
 719         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 720                 if (bss->anqp == NULL)
 721                         continue;
 722                 prov_anqp = bss->anqp->hs20_osu_providers_list;
 723                 if (prov_anqp == NULL)
 724                         continue;
 725                 wpa_printf(MSG_DEBUG, "HS 2.0: Parsing OSU Providers list from "
 726                            MACSTR, MAC2STR(bss->bssid));
 727                 wpa_hexdump_buf(MSG_DEBUG, "HS 2.0: OSU Providers list",
 728                                 prov_anqp);
 729                 pos = wpabuf_head(prov_anqp);
 730                 end = pos + wpabuf_len(prov_anqp);
 731
 732                 /* OSU SSID */
 733                 if (pos + 1 > end)
 734                         continue;
 735                 if (pos + 1 + pos[0] > end) {
 736                         wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for "
 737                                    "OSU SSID");
 738                         continue;
 739                 }
 740                 osu_ssid_len = *pos++;
 741                 if (osu_ssid_len > 32) {
 742                         wpa_printf(MSG_DEBUG, "HS 2.0: Invalid OSU SSID "
 743                                    "Length %u", osu_ssid_len);
 744                         continue;
 745                 }
 746                 osu_ssid = pos;
 747                 pos += osu_ssid_len;
 748
 749                 if (pos + 1 > end) {
 750                         wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for "
 751                                    "Number of OSU Providers");
 752                         continue;
 753                 }
 754                 num_providers = *pos++;
 755                 wpa_printf(MSG_DEBUG, "HS 2.0: Number of OSU Providers: %u",
 756                            num_providers);
 757
 758                 /* OSU Providers */
 759                 while (pos + 2 < end && num_providers > 0) {
 760                         num_providers--;
 761                         len = WPA_GET_LE16(pos);
 762                         pos += 2;
 763                         if (pos + len > end)
 764                                 break;
 765                         hs20_osu_add_prov(wpa_s, bss, osu_ssid,
 766                                           osu_ssid_len, pos, len);
 767                         pos += len;
 768                 }
 769
 770                 if (pos != end) {
 771                         wpa_printf(MSG_DEBUG, "HS 2.0: Ignored %d bytes of "
 772                                    "extra data after OSU Providers",
 773                                    (int) (end - pos));
 774                 }
 775         }
 776
 777         wpa_s->fetch_osu_icon_in_progress = 1;
 778         hs20_next_osu_icon(wpa_s);
 779 }
 780
 781
 782 static void hs20_osu_scan_res_handler(struct wpa_supplicant *wpa_s,
 783                                       struct wpa_scan_results *scan_res)
 784 {
 785         wpa_printf(MSG_DEBUG, "OSU provisioning fetch scan completed");
 786         wpa_s->network_select = 0;
 787         wpa_s->fetch_all_anqp = 1;
 788         wpa_s->fetch_osu_info = 1;
 789         wpa_s->fetch_osu_icon_in_progress = 0;
 790
 791         interworking_start_fetch_anqp(wpa_s);
 792 }
 793
 794
 795 int hs20_fetch_osu(struct wpa_supplicant *wpa_s)
 796 {
 797         if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
 798                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 799                            "interface disabled");
 800                 return -1;
 801         }
 802
 803         if (wpa_s->scanning) {
 804                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 805                            "scanning");
 806                 return -1;
 807         }
 808
 809         if (wpa_s->conf->osu_dir == NULL) {
 810                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 811                            "osu_dir not configured");
 812                 return -1;
 813         }
 814
 815         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select) {
 816                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 817                            "fetch in progress (%d, %d)",
 818                            wpa_s->fetch_anqp_in_progress,
 819                            wpa_s->network_select);
 820                 return -1;
 821         }
 822
 823         wpa_msg(wpa_s, MSG_INFO, "Starting OSU provisioning information fetch");
 824         wpa_s->scan_req = MANUAL_SCAN_REQ;
 825         wpa_s->scan_res_handler = hs20_osu_scan_res_handler;
 826         wpa_supplicant_req_scan(wpa_s, 0, 0);
 827
 828         return 0;
 829 }
 830
 831
 832 void hs20_cancel_fetch_osu(struct wpa_supplicant *wpa_s)
 833 {
 834         wpa_printf(MSG_DEBUG, "Cancel OSU fetch");
 835         interworking_stop_fetch_anqp(wpa_s);
 836         wpa_s->network_select = 0;
 837         wpa_s->fetch_osu_info = 0;
 838         wpa_s->fetch_osu_icon_in_progress = 0;
 839 }
 840
 841
 842 void hs20_icon_fetch_failed(struct wpa_supplicant *wpa_s)
 843 {
 844         hs20_osu_icon_fetch_result(wpa_s, -1);
 845         eloop_cancel_timeout(hs20_continue_icon_fetch, wpa_s, NULL);
 846         eloop_register_timeout(0, 0, hs20_continue_icon_fetch, wpa_s, NULL);
 847 }
 848
 849
 850 void hs20_rx_subscription_remediation(struct wpa_supplicant *wpa_s,
 851                                       const char *url, u8 osu_method)
 852 {
 853         if (url)
 854                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION "%u %s",
 855                         osu_method, url);
 856         else
 857                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION);
 858 }
 859
 860
 861 void hs20_rx_deauth_imminent_notice(struct wpa_supplicant *wpa_s, u8 code,
 862                                     u16 reauth_delay, const char *url)
 863 {
 864         if (!wpa_sm_pmf_enabled(wpa_s->wpa)) {
 865                 wpa_printf(MSG_DEBUG, "HS 2.0: Ignore deauthentication imminent notice since PMF was not enabled");
 866                 return;
 867         }
 868
 869         wpa_msg(wpa_s, MSG_INFO, HS20_DEAUTH_IMMINENT_NOTICE "%u %u %s",
 870                 code, reauth_delay, url);
 871
 872         if (code == HS20_DEAUTH_REASON_CODE_BSS) {
 873                 wpa_printf(MSG_DEBUG, "HS 2.0: Add BSS to blacklist");
 874                 wpa_blacklist_add(wpa_s, wpa_s->bssid);
 875         }
 876
 877         if (code == HS20_DEAUTH_REASON_CODE_ESS && wpa_s->current_ssid) {
 878                 struct os_time now;
 879                 os_get_time(&now);
 880                 if (now.sec + reauth_delay <=
 881                     wpa_s->current_ssid->disabled_until.sec)
 882                         return;
 883                 wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds",
 884                            reauth_delay);
 885                 wpa_s->current_ssid->disabled_until.sec =
 886                         now.sec + reauth_delay;
 887         }
 888 }