libeap/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 #include <sys/stat.h>
  11
  12 #include "common.h"
  13 #include "eloop.h"
  14 #include "common/ieee802_11_common.h"
  15 #include "common/ieee802_11_defs.h"
  16 #include "common/gas.h"
  17 #include "common/wpa_ctrl.h"
  18 #include "rsn_supp/wpa.h"
  19 #include "wpa_supplicant_i.h"
  20 #include "driver_i.h"
  21 #include "config.h"
  22 #include "scan.h"
  23 #include "bss.h"
  24 #include "blacklist.h"
  25 #include "gas_query.h"
  26 #include "interworking.h"
  27 #include "hs20_supplicant.h"
  28
  29
  30 #define OSU_MAX_ITEMS 10
  31
  32 struct osu_lang_string {
  33         char lang[4];
  34         char text[253];
  35 };
  36
  37 struct osu_icon {
  38         u16 width;
  39         u16 height;
  40         char lang[4];
  41         char icon_type[256];
  42         char filename[256];
  43         unsigned int id;
  44         unsigned int failed:1;
  45 };
  46
  47 struct osu_provider {
  48         u8 bssid[ETH_ALEN];
  49         u8 osu_ssid[SSID_MAX_LEN];
  50         u8 osu_ssid_len;
  51         char server_uri[256];
  52         u32 osu_methods; /* bit 0 = OMA-DM, bit 1 = SOAP-XML SPP */
  53         char osu_nai[256];
  54         struct osu_lang_string friendly_name[OSU_MAX_ITEMS];
  55         size_t friendly_name_count;
  56         struct osu_lang_string serv_desc[OSU_MAX_ITEMS];
  57         size_t serv_desc_count;
  58         struct osu_icon icon[OSU_MAX_ITEMS];
  59         size_t icon_count;
  60 };
  61
  62
  63 void wpas_hs20_add_indication(struct wpabuf *buf, int pps_mo_id)
  64 {
  65         u8 conf;
  66
  67         wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
  68         wpabuf_put_u8(buf, pps_mo_id >= 0 ? 7 : 5);
  69         wpabuf_put_be24(buf, OUI_WFA);
  70         wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
  71         conf = HS20_VERSION;
  72         if (pps_mo_id >= 0)
  73                 conf |= HS20_PPS_MO_ID_PRESENT;
  74         wpabuf_put_u8(buf, conf);
  75         if (pps_mo_id >= 0)
  76                 wpabuf_put_le16(buf, pps_mo_id);
  77 }
  78
  79
  80 int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
  81                     struct wpa_bss *bss)
  82 {
  83         if (!wpa_s->conf->hs20 || !ssid)
  84                 return 0;
  85
  86         if (ssid->parent_cred)
  87                 return 1;
  88
  89         if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
  90                 return 0;
  91
  92         /*
  93          * This may catch some non-Hotspot 2.0 cases, but it is safer to do that
  94          * than cause Hotspot 2.0 connections without indication element getting
  95          * added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
  96          */
  97
  98         if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
  99                 return 0;
 100         if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
 101                 return 0;
 102         if (ssid->proto != WPA_PROTO_RSN)
 103                 return 0;
 104
 105         return 1;
 106 }
 107
 108
 109 int hs20_get_pps_mo_id(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 110 {
 111         struct wpa_cred *cred;
 112
 113         if (ssid == NULL)
 114                 return 0;
 115
 116         if (ssid->update_identifier)
 117                 return ssid->update_identifier;
 118
 119         if (ssid->parent_cred == NULL)
 120                 return 0;
 121
 122         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
 123                 if (ssid->parent_cred == cred)
 124                         return cred->update_identifier;
 125         }
 126
 127         return 0;
 128 }
 129
 130
 131 void hs20_put_anqp_req(u32 stypes, const u8 *payload, size_t payload_len,
 132                        struct wpabuf *buf)
 133 {
 134         u8 *len_pos;
 135
 136         if (buf == NULL)
 137                 return;
 138
 139         len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
 140         wpabuf_put_be24(buf, OUI_WFA);
 141         wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
 142         if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
 143                 wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
 144                 wpabuf_put_u8(buf, 0); /* Reserved */
 145                 if (payload)
 146                         wpabuf_put_data(buf, payload, payload_len);
 147         } else if (stypes == BIT(HS20_STYPE_ICON_REQUEST)) {
 148                 wpabuf_put_u8(buf, HS20_STYPE_ICON_REQUEST);
 149                 wpabuf_put_u8(buf, 0); /* Reserved */
 150                 if (payload)
 151                         wpabuf_put_data(buf, payload, payload_len);
 152         } else {
 153                 u8 i;
 154                 wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
 155                 wpabuf_put_u8(buf, 0); /* Reserved */
 156                 for (i = 0; i < 32; i++) {
 157                         if (stypes & BIT(i))
 158                                 wpabuf_put_u8(buf, i);
 159                 }
 160         }
 161         gas_anqp_set_element_len(buf, len_pos);
 162
 163         gas_anqp_set_len(buf);
 164 }
 165
 166
 167 struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
 168                                     size_t payload_len)
 169 {
 170         struct wpabuf *buf;
 171
 172         buf = gas_anqp_build_initial_req(0, 100 + payload_len);
 173         if (buf == NULL)
 174                 return NULL;
 175
 176         hs20_put_anqp_req(stypes, payload, payload_len, buf);
 177
 178         return buf;
 179 }
 180
 181
 182 int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
 183                        const u8 *payload, size_t payload_len)
 184 {
 185         struct wpabuf *buf;
 186         int ret = 0;
 187         int freq;
 188         struct wpa_bss *bss;
 189         int res;
 190
 191         bss = wpa_bss_get_bssid(wpa_s, dst);
 192         if (!bss) {
 193                 wpa_printf(MSG_WARNING,
 194                            "ANQP: Cannot send query to unknown BSS "
 195                            MACSTR, MAC2STR(dst));
 196                 return -1;
 197         }
 198
 199         wpa_bss_anqp_unshare_alloc(bss);
 200         freq = bss->freq;
 201
 202         wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
 203                    "subtypes 0x%x", MAC2STR(dst), stypes);
 204
 205         buf = hs20_build_anqp_req(stypes, payload, payload_len);
 206         if (buf == NULL)
 207                 return -1;
 208
 209         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
 210         if (res < 0) {
 211                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 212                 wpabuf_free(buf);
 213                 ret = -1;
 214         } else
 215                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 216                            "%u", res);
 217
 218         return ret;
 219 }
 220
 221
 222 static void hs20_set_osu_access_permission(const char *osu_dir,
 223                                            const char *fname)
 224 {
 225         struct stat statbuf;
 226
 227         /* Get OSU directory information */
 228         if (stat(osu_dir, &statbuf) < 0) {
 229                 wpa_printf(MSG_WARNING, "Cannot stat the OSU directory %s",
 230                            osu_dir);
 231                 return;
 232         }
 233
 234         if (chmod(fname, statbuf.st_mode) < 0) {
 235                 wpa_printf(MSG_WARNING,
 236                            "Cannot change the permissions for %s", fname);
 237                 return;
 238         }
 239
 240         if (chown(fname, statbuf.st_uid, statbuf.st_gid) < 0) {
 241                 wpa_printf(MSG_WARNING, "Cannot change the ownership for %s",
 242                            fname);
 243         }
 244 }
 245
 246 static int hs20_process_icon_binary_file(struct wpa_supplicant *wpa_s,
 247                                          const u8 *sa, const u8 *pos,
 248                                          size_t slen)
 249 {
 250         char fname[256];
 251         int png;
 252         FILE *f;
 253         u16 data_len;
 254
 255         wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR " Icon Binary File",
 256                 MAC2STR(sa));
 257
 258         if (slen < 4) {
 259                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 260                         "value from " MACSTR, MAC2STR(sa));
 261                 return -1;
 262         }
 263
 264         wpa_printf(MSG_DEBUG, "HS 2.0: Download Status Code %u", *pos);
 265         if (*pos != 0)
 266                 return -1;
 267         pos++;
 268         slen--;
 269
 270         if ((size_t) 1 + pos[0] > slen) {
 271                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 272                         "value from " MACSTR, MAC2STR(sa));
 273                 return -1;
 274         }
 275         wpa_hexdump_ascii(MSG_DEBUG, "Icon Type", pos + 1, pos[0]);
 276         png = os_strncasecmp((char *) pos + 1, "image/png", 9) == 0;
 277         slen -= 1 + pos[0];
 278         pos += 1 + pos[0];
 279
 280         if (slen < 2) {
 281                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 282                         "value from " MACSTR, MAC2STR(sa));
 283                 return -1;
 284         }
 285         data_len = WPA_GET_LE16(pos);
 286         pos += 2;
 287         slen -= 2;
 288
 289         if (data_len > slen) {
 290                 wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short Icon Binary File "
 291                         "value from " MACSTR, MAC2STR(sa));
 292                 return -1;
 293         }
 294
 295         wpa_printf(MSG_DEBUG, "Icon Binary Data: %u bytes", data_len);
 296         if (wpa_s->conf->osu_dir == NULL)
 297                 return -1;
 298
 299         wpa_s->osu_icon_id++;
 300         if (wpa_s->osu_icon_id == 0)
 301                 wpa_s->osu_icon_id++;
 302         snprintf(fname, sizeof(fname), "%s/osu-icon-%u.%s",
 303                  wpa_s->conf->osu_dir, wpa_s->osu_icon_id,
 304                  png ? "png" : "icon");
 305         f = fopen(fname, "wb");
 306         if (f == NULL)
 307                 return -1;
 308
 309         hs20_set_osu_access_permission(wpa_s->conf->osu_dir, fname);
 310
 311         if (fwrite(pos, slen, 1, f) != 1) {
 312                 fclose(f);
 313                 unlink(fname);
 314                 return -1;
 315         }
 316         fclose(f);
 317
 318         wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP-ICON %s", fname);
 319         return 0;
 320 }
 321
 322
 323 static void hs20_continue_icon_fetch(void *eloop_ctx, void *sock_ctx)
 324 {
 325         struct wpa_supplicant *wpa_s = eloop_ctx;
 326         if (wpa_s->fetch_osu_icon_in_progress)
 327                 hs20_next_osu_icon(wpa_s);
 328 }
 329
 330
 331 static void hs20_osu_icon_fetch_result(struct wpa_supplicant *wpa_s, int res)
 332 {
 333         size_t i, j;
 334         struct os_reltime now, tmp;
 335         int dur;
 336
 337         os_get_reltime(&now);
 338         os_reltime_sub(&now, &wpa_s->osu_icon_fetch_start, &tmp);
 339         dur = tmp.sec * 1000 + tmp.usec / 1000;
 340         wpa_printf(MSG_DEBUG, "HS 2.0: Icon fetch dur=%d ms res=%d",
 341                    dur, res);
 342
 343         for (i = 0; i < wpa_s->osu_prov_count; i++) {
 344                 struct osu_provider *osu = &wpa_s->osu_prov[i];
 345                 for (j = 0; j < osu->icon_count; j++) {
 346                         struct osu_icon *icon = &osu->icon[j];
 347                         if (icon->id || icon->failed)
 348                                 continue;
 349                         if (res < 0)
 350                                 icon->failed = 1;
 351                         else
 352                                 icon->id = wpa_s->osu_icon_id;
 353                         return;
 354                 }
 355         }
 356 }
 357
 358
 359 void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
 360                                   struct wpa_bss *bss, const u8 *sa,
 361                                   const u8 *data, size_t slen)
 362 {
 363         const u8 *pos = data;
 364         u8 subtype;
 365         struct wpa_bss_anqp *anqp = NULL;
 366         int ret;
 367
 368         if (slen < 2)
 369                 return;
 370
 371         if (bss)
 372                 anqp = bss->anqp;
 373
 374         subtype = *pos++;
 375         slen--;
 376
 377         pos++; /* Reserved */
 378         slen--;
 379
 380         switch (subtype) {
 381         case HS20_STYPE_CAPABILITY_LIST:
 382                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 383                         " HS Capability List", MAC2STR(sa));
 384                 wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
 385                 if (anqp) {
 386                         wpabuf_free(anqp->hs20_capability_list);
 387                         anqp->hs20_capability_list =
 388                                 wpabuf_alloc_copy(pos, slen);
 389                 }
 390                 break;
 391         case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
 392                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 393                         " Operator Friendly Name", MAC2STR(sa));
 394                 wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
 395                 if (anqp) {
 396                         wpabuf_free(anqp->hs20_operator_friendly_name);
 397                         anqp->hs20_operator_friendly_name =
 398                                 wpabuf_alloc_copy(pos, slen);
 399                 }
 400                 break;
 401         case HS20_STYPE_WAN_METRICS:
 402                 wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
 403                 if (slen < 13) {
 404                         wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
 405                                 "Metrics value from " MACSTR, MAC2STR(sa));
 406                         break;
 407                 }
 408                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 409                         " WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
 410                         pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
 411                         pos[9], pos[10], WPA_GET_LE16(pos + 11));
 412                 if (anqp) {
 413                         wpabuf_free(anqp->hs20_wan_metrics);
 414                         anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
 415                 }
 416                 break;
 417         case HS20_STYPE_CONNECTION_CAPABILITY:
 418                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 419                         " Connection Capability", MAC2STR(sa));
 420                 wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
 421                 if (anqp) {
 422                         wpabuf_free(anqp->hs20_connection_capability);
 423                         anqp->hs20_connection_capability =
 424                                 wpabuf_alloc_copy(pos, slen);
 425                 }
 426                 break;
 427         case HS20_STYPE_OPERATING_CLASS:
 428                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 429                         " Operating Class", MAC2STR(sa));
 430                 wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
 431                 if (anqp) {
 432                         wpabuf_free(anqp->hs20_operating_class);
 433                         anqp->hs20_operating_class =
 434                                 wpabuf_alloc_copy(pos, slen);
 435                 }
 436                 break;
 437         case HS20_STYPE_OSU_PROVIDERS_LIST:
 438                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 439                         " OSU Providers list", MAC2STR(sa));
 440                 wpa_s->num_prov_found++;
 441                 if (anqp) {
 442                         wpabuf_free(anqp->hs20_osu_providers_list);
 443                         anqp->hs20_osu_providers_list =
 444                                 wpabuf_alloc_copy(pos, slen);
 445                 }
 446                 break;
 447         case HS20_STYPE_ICON_BINARY_FILE:
 448                 ret = hs20_process_icon_binary_file(wpa_s, sa, pos, slen);
 449                 if (wpa_s->fetch_osu_icon_in_progress) {
 450                         hs20_osu_icon_fetch_result(wpa_s, ret);
 451                         eloop_cancel_timeout(hs20_continue_icon_fetch,
 452                                              wpa_s, NULL);
 453                         eloop_register_timeout(0, 0, hs20_continue_icon_fetch,
 454                                                wpa_s, NULL);
 455                 }
 456                 break;
 457         default:
 458                 wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
 459                 break;
 460         }
 461 }
 462
 463
 464 void hs20_notify_parse_done(struct wpa_supplicant *wpa_s)
 465 {
 466         if (!wpa_s->fetch_osu_icon_in_progress)
 467                 return;
 468         if (eloop_is_timeout_registered(hs20_continue_icon_fetch, wpa_s, NULL))
 469                 return;
 470         /*
 471          * We are going through icon fetch, but no icon response was received.
 472          * Assume this means the current AP could not provide an answer to avoid
 473          * getting stuck in fetch iteration.
 474          */
 475         hs20_icon_fetch_failed(wpa_s);
 476 }
 477
 478
 479 static void hs20_free_osu_prov_entry(struct osu_provider *prov)
 480 {
 481 }
 482
 483
 484 void hs20_free_osu_prov(struct wpa_supplicant *wpa_s)
 485 {
 486         size_t i;
 487         for (i = 0; i < wpa_s->osu_prov_count; i++)
 488                 hs20_free_osu_prov_entry(&wpa_s->osu_prov[i]);
 489         os_free(wpa_s->osu_prov);
 490         wpa_s->osu_prov = NULL;
 491         wpa_s->osu_prov_count = 0;
 492 }
 493
 494
 495 static void hs20_osu_fetch_done(struct wpa_supplicant *wpa_s)
 496 {
 497         char fname[256];
 498         FILE *f;
 499         size_t i, j;
 500
 501         wpa_s->fetch_osu_info = 0;
 502         wpa_s->fetch_osu_icon_in_progress = 0;
 503
 504         if (wpa_s->conf->osu_dir == NULL) {
 505                 hs20_free_osu_prov(wpa_s);
 506                 wpa_s->fetch_anqp_in_progress = 0;
 507                 return;
 508         }
 509
 510         snprintf(fname, sizeof(fname), "%s/osu-providers.txt",
 511                  wpa_s->conf->osu_dir);
 512         f = fopen(fname, "w");
 513         if (f == NULL) {
 514                 hs20_free_osu_prov(wpa_s);
 515                 return;
 516         }
 517
 518         hs20_set_osu_access_permission(wpa_s->conf->osu_dir, fname);
 519
 520         for (i = 0; i < wpa_s->osu_prov_count; i++) {
 521                 struct osu_provider *osu = &wpa_s->osu_prov[i];
 522                 if (i > 0)
 523                         fprintf(f, "\n");
 524                 fprintf(f, "OSU-PROVIDER " MACSTR "\n"
 525                         "uri=%s\n"
 526                         "methods=%08x\n",
 527                         MAC2STR(osu->bssid), osu->server_uri, osu->osu_methods);
 528                 if (osu->osu_ssid_len) {
 529                         fprintf(f, "osu_ssid=%s\n",
 530                                 wpa_ssid_txt(osu->osu_ssid,
 531                                              osu->osu_ssid_len));
 532                 }
 533                 if (osu->osu_nai[0])
 534                         fprintf(f, "osu_nai=%s\n", osu->osu_nai);
 535                 for (j = 0; j < osu->friendly_name_count; j++) {
 536                         fprintf(f, "friendly_name=%s:%s\n",
 537                                 osu->friendly_name[j].lang,
 538                                 osu->friendly_name[j].text);
 539                 }
 540                 for (j = 0; j < osu->serv_desc_count; j++) {
 541                         fprintf(f, "desc=%s:%s\n",
 542                                 osu->serv_desc[j].lang,
 543                                 osu->serv_desc[j].text);
 544                 }
 545                 for (j = 0; j < osu->icon_count; j++) {
 546                         struct osu_icon *icon = &osu->icon[j];
 547                         if (icon->failed)
 548                                 continue; /* could not fetch icon */
 549                         fprintf(f, "icon=%u:%u:%u:%s:%s:%s\n",
 550                                 icon->id, icon->width, icon->height, icon->lang,
 551                                 icon->icon_type, icon->filename);
 552                 }
 553         }
 554         fclose(f);
 555         hs20_free_osu_prov(wpa_s);
 556
 557         wpa_msg(wpa_s, MSG_INFO, "OSU provider fetch completed");
 558         wpa_s->fetch_anqp_in_progress = 0;
 559 }
 560
 561
 562 void hs20_next_osu_icon(struct wpa_supplicant *wpa_s)
 563 {
 564         size_t i, j;
 565
 566         wpa_printf(MSG_DEBUG, "HS 2.0: Ready to fetch next icon");
 567
 568         for (i = 0; i < wpa_s->osu_prov_count; i++) {
 569                 struct osu_provider *osu = &wpa_s->osu_prov[i];
 570                 for (j = 0; j < osu->icon_count; j++) {
 571                         struct osu_icon *icon = &osu->icon[j];
 572                         if (icon->id || icon->failed)
 573                                 continue;
 574
 575                         wpa_printf(MSG_DEBUG, "HS 2.0: Try to fetch icon '%s' "
 576                                    "from " MACSTR, icon->filename,
 577                                    MAC2STR(osu->bssid));
 578                         os_get_reltime(&wpa_s->osu_icon_fetch_start);
 579                         if (hs20_anqp_send_req(wpa_s, osu->bssid,
 580                                                BIT(HS20_STYPE_ICON_REQUEST),
 581                                                (u8 *) icon->filename,
 582                                                os_strlen(icon->filename)) < 0) {
 583                                 icon->failed = 1;
 584                                 continue;
 585                         }
 586                         return;
 587                 }
 588         }
 589
 590         wpa_printf(MSG_DEBUG, "HS 2.0: No more icons to fetch");
 591         hs20_osu_fetch_done(wpa_s);
 592 }
 593
 594
 595 static void hs20_osu_add_prov(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
 596                               const u8 *osu_ssid, u8 osu_ssid_len,
 597                               const u8 *pos, size_t len)
 598 {
 599         struct osu_provider *prov;
 600         const u8 *end = pos + len;
 601         u16 len2;
 602         const u8 *pos2;
 603         u8 uri_len, osu_method_len, osu_nai_len;
 604
 605         wpa_hexdump(MSG_DEBUG, "HS 2.0: Parsing OSU Provider", pos, len);
 606         prov = os_realloc_array(wpa_s->osu_prov,
 607                                 wpa_s->osu_prov_count + 1,
 608                                 sizeof(*prov));
 609         if (prov == NULL)
 610                 return;
 611         wpa_s->osu_prov = prov;
 612         prov = &prov[wpa_s->osu_prov_count];
 613         os_memset(prov, 0, sizeof(*prov));
 614
 615         os_memcpy(prov->bssid, bss->bssid, ETH_ALEN);
 616         os_memcpy(prov->osu_ssid, osu_ssid, osu_ssid_len);
 617         prov->osu_ssid_len = osu_ssid_len;
 618
 619         /* OSU Friendly Name Length */
 620         if (pos + 2 > end) {
 621                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 622                            "Friendly Name Length");
 623                 return;
 624         }
 625         len2 = WPA_GET_LE16(pos);
 626         pos += 2;
 627         if (len2 > end - pos) {
 628                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 629                            "Friendly Name Duples");
 630                 return;
 631         }
 632         pos2 = pos;
 633         pos += len2;
 634
 635         /* OSU Friendly Name Duples */
 636         while (pos2 + 4 <= pos && prov->friendly_name_count < OSU_MAX_ITEMS) {
 637                 struct osu_lang_string *f;
 638                 if (pos2 + 1 + pos2[0] > pos || pos2[0] < 3) {
 639                         wpa_printf(MSG_DEBUG, "Invalid OSU Friendly Name");
 640                         break;
 641                 }
 642                 f = &prov->friendly_name[prov->friendly_name_count++];
 643                 os_memcpy(f->lang, pos2 + 1, 3);
 644                 os_memcpy(f->text, pos2 + 1 + 3, pos2[0] - 3);
 645                 pos2 += 1 + pos2[0];
 646         }
 647
 648         /* OSU Server URI */
 649         if (pos + 1 > end) {
 650                 wpa_printf(MSG_DEBUG,
 651                            "HS 2.0: Not enough room for OSU Server URI length");
 652                 return;
 653         }
 654         uri_len = *pos++;
 655         if (uri_len > end - pos) {
 656                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Server "
 657                            "URI");
 658                 return;
 659         }
 660         os_memcpy(prov->server_uri, pos, uri_len);
 661         pos += uri_len;
 662
 663         /* OSU Method list */
 664         if (pos + 1 > end) {
 665                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Method "
 666                            "list length");
 667                 return;
 668         }
 669         osu_method_len = pos[0];
 670         if (osu_method_len > end - pos - 1) {
 671                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU Method "
 672                            "list");
 673                 return;
 674         }
 675         pos2 = pos + 1;
 676         pos += 1 + osu_method_len;
 677         while (pos2 < pos) {
 678                 if (*pos2 < 32)
 679                         prov->osu_methods |= BIT(*pos2);
 680                 pos2++;
 681         }
 682
 683         /* Icons Available Length */
 684         if (pos + 2 > end) {
 685                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for Icons "
 686                            "Available Length");
 687                 return;
 688         }
 689         len2 = WPA_GET_LE16(pos);
 690         pos += 2;
 691         if (len2 > end - pos) {
 692                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for Icons "
 693                            "Available");
 694                 return;
 695         }
 696         pos2 = pos;
 697         pos += len2;
 698
 699         /* Icons Available */
 700         while (pos2 < pos) {
 701                 struct osu_icon *icon = &prov->icon[prov->icon_count];
 702                 u8 flen;
 703
 704                 if (pos2 + 2 + 2 + 3 + 1 + 1 > pos) {
 705                         wpa_printf(MSG_DEBUG, "HS 2.0: Invalid Icon Metadata");
 706                         break;
 707                 }
 708
 709                 icon->width = WPA_GET_LE16(pos2);
 710                 pos2 += 2;
 711                 icon->height = WPA_GET_LE16(pos2);
 712                 pos2 += 2;
 713                 os_memcpy(icon->lang, pos2, 3);
 714                 pos2 += 3;
 715
 716                 flen = pos2[0];
 717                 if (flen > pos - pos2 - 1) {
 718                         wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon Type");
 719                         break;
 720                 }
 721                 os_memcpy(icon->icon_type, pos2 + 1, flen);
 722                 pos2 += 1 + flen;
 723
 724                 if (pos2 + 1 > pos) {
 725                         wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon "
 726                                    "Filename length");
 727                         break;
 728                 }
 729                 flen = pos2[0];
 730                 if (flen > pos - pos2 - 1) {
 731                         wpa_printf(MSG_DEBUG, "HS 2.0: Not room for Icon "
 732                                    "Filename");
 733                         break;
 734                 }
 735                 os_memcpy(icon->filename, pos2 + 1, flen);
 736                 pos2 += 1 + flen;
 737
 738                 prov->icon_count++;
 739         }
 740
 741         /* OSU_NAI */
 742         if (pos + 1 > end) {
 743                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU_NAI");
 744                 return;
 745         }
 746         osu_nai_len = pos[0];
 747         if (osu_nai_len > end - pos - 1) {
 748                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU_NAI");
 749                 return;
 750         }
 751         os_memcpy(prov->osu_nai, pos + 1, osu_nai_len);
 752         pos += 1 + osu_nai_len;
 753
 754         /* OSU Service Description Length */
 755         if (pos + 2 > end) {
 756                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 757                            "Service Description Length");
 758                 return;
 759         }
 760         len2 = WPA_GET_LE16(pos);
 761         pos += 2;
 762         if (len2 > end - pos) {
 763                 wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for OSU "
 764                            "Service Description Duples");
 765                 return;
 766         }
 767         pos2 = pos;
 768         pos += len2;
 769
 770         /* OSU Service Description Duples */
 771         while (pos2 + 4 <= pos && prov->serv_desc_count < OSU_MAX_ITEMS) {
 772                 struct osu_lang_string *f;
 773                 u8 descr_len;
 774
 775                 descr_len = pos2[0];
 776                 if (descr_len > pos - pos2 - 1 || descr_len < 3) {
 777                         wpa_printf(MSG_DEBUG, "Invalid OSU Service "
 778                                    "Description");
 779                         break;
 780                 }
 781                 f = &prov->serv_desc[prov->serv_desc_count++];
 782                 os_memcpy(f->lang, pos2 + 1, 3);
 783                 os_memcpy(f->text, pos2 + 1 + 3, descr_len - 3);
 784                 pos2 += 1 + descr_len;
 785         }
 786
 787         wpa_printf(MSG_DEBUG, "HS 2.0: Added OSU Provider through " MACSTR,
 788                    MAC2STR(bss->bssid));
 789         wpa_s->osu_prov_count++;
 790 }
 791
 792
 793 void hs20_osu_icon_fetch(struct wpa_supplicant *wpa_s)
 794 {
 795         struct wpa_bss *bss;
 796         struct wpabuf *prov_anqp;
 797         const u8 *pos, *end;
 798         u16 len;
 799         const u8 *osu_ssid;
 800         u8 osu_ssid_len;
 801         u8 num_providers;
 802
 803         hs20_free_osu_prov(wpa_s);
 804
 805         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 806                 if (bss->anqp == NULL)
 807                         continue;
 808                 prov_anqp = bss->anqp->hs20_osu_providers_list;
 809                 if (prov_anqp == NULL)
 810                         continue;
 811                 wpa_printf(MSG_DEBUG, "HS 2.0: Parsing OSU Providers list from "
 812                            MACSTR, MAC2STR(bss->bssid));
 813                 wpa_hexdump_buf(MSG_DEBUG, "HS 2.0: OSU Providers list",
 814                                 prov_anqp);
 815                 pos = wpabuf_head(prov_anqp);
 816                 end = pos + wpabuf_len(prov_anqp);
 817
 818                 /* OSU SSID */
 819                 if (pos + 1 > end)
 820                         continue;
 821                 if (pos + 1 + pos[0] > end) {
 822                         wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for "
 823                                    "OSU SSID");
 824                         continue;
 825                 }
 826                 osu_ssid_len = *pos++;
 827                 if (osu_ssid_len > SSID_MAX_LEN) {
 828                         wpa_printf(MSG_DEBUG, "HS 2.0: Invalid OSU SSID "
 829                                    "Length %u", osu_ssid_len);
 830                         continue;
 831                 }
 832                 osu_ssid = pos;
 833                 pos += osu_ssid_len;
 834
 835                 if (pos + 1 > end) {
 836                         wpa_printf(MSG_DEBUG, "HS 2.0: Not enough room for "
 837                                    "Number of OSU Providers");
 838                         continue;
 839                 }
 840                 num_providers = *pos++;
 841                 wpa_printf(MSG_DEBUG, "HS 2.0: Number of OSU Providers: %u",
 842                            num_providers);
 843
 844                 /* OSU Providers */
 845                 while (pos + 2 < end && num_providers > 0) {
 846                         num_providers--;
 847                         len = WPA_GET_LE16(pos);
 848                         pos += 2;
 849                         if (len > (unsigned int) (end - pos))
 850                                 break;
 851                         hs20_osu_add_prov(wpa_s, bss, osu_ssid,
 852                                           osu_ssid_len, pos, len);
 853                         pos += len;
 854                 }
 855
 856                 if (pos != end) {
 857                         wpa_printf(MSG_DEBUG, "HS 2.0: Ignored %d bytes of "
 858                                    "extra data after OSU Providers",
 859                                    (int) (end - pos));
 860                 }
 861         }
 862
 863         wpa_s->fetch_osu_icon_in_progress = 1;
 864         hs20_next_osu_icon(wpa_s);
 865 }
 866
 867
 868 static void hs20_osu_scan_res_handler(struct wpa_supplicant *wpa_s,
 869                                       struct wpa_scan_results *scan_res)
 870 {
 871         wpa_printf(MSG_DEBUG, "OSU provisioning fetch scan completed");
 872         if (!wpa_s->fetch_osu_waiting_scan) {
 873                 wpa_printf(MSG_DEBUG, "OSU fetch have been canceled");
 874                 return;
 875         }
 876         wpa_s->network_select = 0;
 877         wpa_s->fetch_all_anqp = 1;
 878         wpa_s->fetch_osu_info = 1;
 879         wpa_s->fetch_osu_icon_in_progress = 0;
 880
 881         interworking_start_fetch_anqp(wpa_s);
 882 }
 883
 884
 885 int hs20_fetch_osu(struct wpa_supplicant *wpa_s)
 886 {
 887         if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
 888                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 889                            "interface disabled");
 890                 return -1;
 891         }
 892
 893         if (wpa_s->scanning) {
 894                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 895                            "scanning");
 896                 return -1;
 897         }
 898
 899         if (wpa_s->conf->osu_dir == NULL) {
 900                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 901                            "osu_dir not configured");
 902                 return -1;
 903         }
 904
 905         if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select) {
 906                 wpa_printf(MSG_DEBUG, "HS 2.0: Cannot start fetch_osu - "
 907                            "fetch in progress (%d, %d)",
 908                            wpa_s->fetch_anqp_in_progress,
 909                            wpa_s->network_select);
 910                 return -1;
 911         }
 912
 913         wpa_msg(wpa_s, MSG_INFO, "Starting OSU provisioning information fetch");
 914         wpa_s->num_osu_scans = 0;
 915         wpa_s->num_prov_found = 0;
 916         hs20_start_osu_scan(wpa_s);
 917
 918         return 0;
 919 }
 920
 921
 922 void hs20_start_osu_scan(struct wpa_supplicant *wpa_s)
 923 {
 924         wpa_s->fetch_osu_waiting_scan = 1;
 925         wpa_s->num_osu_scans++;
 926         wpa_s->scan_req = MANUAL_SCAN_REQ;
 927         wpa_s->scan_res_handler = hs20_osu_scan_res_handler;
 928         wpa_supplicant_req_scan(wpa_s, 0, 0);
 929 }
 930
 931
 932 void hs20_cancel_fetch_osu(struct wpa_supplicant *wpa_s)
 933 {
 934         wpa_printf(MSG_DEBUG, "Cancel OSU fetch");
 935         interworking_stop_fetch_anqp(wpa_s);
 936         wpa_s->fetch_osu_waiting_scan = 0;
 937         wpa_s->network_select = 0;
 938         wpa_s->fetch_osu_info = 0;
 939         wpa_s->fetch_osu_icon_in_progress = 0;
 940 }
 941
 942
 943 void hs20_icon_fetch_failed(struct wpa_supplicant *wpa_s)
 944 {
 945         hs20_osu_icon_fetch_result(wpa_s, -1);
 946         eloop_cancel_timeout(hs20_continue_icon_fetch, wpa_s, NULL);
 947         eloop_register_timeout(0, 0, hs20_continue_icon_fetch, wpa_s, NULL);
 948 }
 949
 950
 951 void hs20_rx_subscription_remediation(struct wpa_supplicant *wpa_s,
 952                                       const char *url, u8 osu_method)
 953 {
 954         if (url)
 955                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION "%u %s",
 956                         osu_method, url);
 957         else
 958                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION);
 959 }
 960
 961
 962 void hs20_rx_deauth_imminent_notice(struct wpa_supplicant *wpa_s, u8 code,
 963                                     u16 reauth_delay, const char *url)
 964 {
 965         if (!wpa_sm_pmf_enabled(wpa_s->wpa)) {
 966                 wpa_printf(MSG_DEBUG, "HS 2.0: Ignore deauthentication imminent notice since PMF was not enabled");
 967                 return;
 968         }
 969
 970         wpa_msg(wpa_s, MSG_INFO, HS20_DEAUTH_IMMINENT_NOTICE "%u %u %s",
 971                 code, reauth_delay, url);
 972
 973         if (code == HS20_DEAUTH_REASON_CODE_BSS) {
 974                 wpa_printf(MSG_DEBUG, "HS 2.0: Add BSS to blacklist");
 975                 wpa_blacklist_add(wpa_s, wpa_s->bssid);
 976                 /* TODO: For now, disable full ESS since some drivers may not
 977                  * support disabling per BSS. */
 978                 if (wpa_s->current_ssid) {
 979                         struct os_reltime now;
 980                         os_get_reltime(&now);
 981                         if (now.sec + reauth_delay <=
 982                             wpa_s->current_ssid->disabled_until.sec)
 983                                 return;
 984                         wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds (BSS)",
 985                                    reauth_delay);
 986                         wpa_s->current_ssid->disabled_until.sec =
 987                                 now.sec + reauth_delay;
 988                 }
 989         }
 990
 991         if (code == HS20_DEAUTH_REASON_CODE_ESS && wpa_s->current_ssid) {
 992                 struct os_reltime now;
 993                 os_get_reltime(&now);
 994                 if (now.sec + reauth_delay <=
 995                     wpa_s->current_ssid->disabled_until.sec)
 996                         return;
 997                 wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds",
 998                            reauth_delay);
 999                 wpa_s->current_ssid->disabled_until.sec =
1000                         now.sec + reauth_delay;
1001         }
1002 }
1003
1004
1005 void hs20_deinit(struct wpa_supplicant *wpa_s)
1006 {
1007         eloop_cancel_timeout(hs20_continue_icon_fetch, wpa_s, NULL);
1008         hs20_free_osu_prov(wpa_s);
1009 }