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