contrib/wpa/src/p2p/p2p_parse.c

   1 /*
   2  * P2P - IE parser
   3  * Copyright (c) 2009-2010, Atheros Communications
   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 "common/ieee802_11_defs.h"
  13 #include "common/ieee802_11_common.h"
  14 #include "wps/wps_i.h"
  15 #include "p2p_i.h"
  16
  17
  18 static int p2p_parse_attribute(u8 id, const u8 *data, u16 len,
  19                                struct p2p_message *msg)
  20 {
  21         const u8 *pos;
  22         size_t i, nlen;
  23         char devtype[WPS_DEV_TYPE_BUFSIZE];
  24
  25         switch (id) {
  26         case P2P_ATTR_CAPABILITY:
  27                 if (len < 2) {
  28                         wpa_printf(MSG_DEBUG, "P2P: Too short Capability "
  29                                    "attribute (length %d)", len);
  30                         return -1;
  31                 }
  32                 msg->capability = data;
  33                 wpa_printf(MSG_DEBUG, "P2P: * Device Capability %02x "
  34                            "Group Capability %02x",
  35                            data[0], data[1]);
  36                 break;
  37         case P2P_ATTR_DEVICE_ID:
  38                 if (len < ETH_ALEN) {
  39                         wpa_printf(MSG_DEBUG, "P2P: Too short Device ID "
  40                                    "attribute (length %d)", len);
  41                         return -1;
  42                 }
  43                 msg->device_id = data;
  44                 wpa_printf(MSG_DEBUG, "P2P: * Device ID " MACSTR,
  45                            MAC2STR(msg->device_id));
  46                 break;
  47         case P2P_ATTR_GROUP_OWNER_INTENT:
  48                 if (len < 1) {
  49                         wpa_printf(MSG_DEBUG, "P2P: Too short GO Intent "
  50                                    "attribute (length %d)", len);
  51                         return -1;
  52                 }
  53                 msg->go_intent = data;
  54                 wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u "
  55                            "Tie breaker %u", data[0] >> 1, data[0] & 0x01);
  56                 break;
  57         case P2P_ATTR_STATUS:
  58                 if (len < 1) {
  59                         wpa_printf(MSG_DEBUG, "P2P: Too short Status "
  60                                    "attribute (length %d)", len);
  61                         return -1;
  62                 }
  63                 msg->status = data;
  64                 wpa_printf(MSG_DEBUG, "P2P: * Status: %d", data[0]);
  65                 break;
  66         case P2P_ATTR_LISTEN_CHANNEL:
  67                 if (len == 0) {
  68                         wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Ignore "
  69                                    "null channel");
  70                         break;
  71                 }
  72                 if (len < 5) {
  73                         wpa_printf(MSG_DEBUG, "P2P: Too short Listen Channel "
  74                                    "attribute (length %d)", len);
  75                         return -1;
  76                 }
  77                 msg->listen_channel = data;
  78                 wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: "
  79                            "Country %c%c(0x%02x) Regulatory "
  80                            "Class %d Channel Number %d", data[0], data[1],
  81                            data[2], data[3], data[4]);
  82                 break;
  83         case P2P_ATTR_OPERATING_CHANNEL:
  84                 if (len == 0) {
  85                         wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
  86                                    "Ignore null channel");
  87                         break;
  88                 }
  89                 if (len < 5) {
  90                         wpa_printf(MSG_DEBUG, "P2P: Too short Operating "
  91                                    "Channel attribute (length %d)", len);
  92                         return -1;
  93                 }
  94                 msg->operating_channel = data;
  95                 wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
  96                            "Country %c%c(0x%02x) Regulatory "
  97                            "Class %d Channel Number %d", data[0], data[1],
  98                            data[2], data[3], data[4]);
  99                 break;
 100         case P2P_ATTR_CHANNEL_LIST:
 101                 if (len < 3) {
 102                         wpa_printf(MSG_DEBUG, "P2P: Too short Channel List "
 103                                    "attribute (length %d)", len);
 104                         return -1;
 105                 }
 106                 msg->channel_list = data;
 107                 msg->channel_list_len = len;
 108                 wpa_printf(MSG_DEBUG, "P2P: * Channel List: Country String "
 109                            "'%c%c(0x%02x)'", data[0], data[1], data[2]);
 110                 wpa_hexdump(MSG_MSGDUMP, "P2P: Channel List",
 111                             msg->channel_list, msg->channel_list_len);
 112                 break;
 113         case P2P_ATTR_GROUP_INFO:
 114                 msg->group_info = data;
 115                 msg->group_info_len = len;
 116                 wpa_printf(MSG_DEBUG, "P2P: * Group Info");
 117                 break;
 118         case P2P_ATTR_DEVICE_INFO:
 119                 if (len < ETH_ALEN + 2 + 8 + 1) {
 120                         wpa_printf(MSG_DEBUG, "P2P: Too short Device Info "
 121                                    "attribute (length %d)", len);
 122                         return -1;
 123                 }
 124                 msg->p2p_device_info = data;
 125                 msg->p2p_device_info_len = len;
 126                 pos = data;
 127                 msg->p2p_device_addr = pos;
 128                 pos += ETH_ALEN;
 129                 msg->config_methods = WPA_GET_BE16(pos);
 130                 pos += 2;
 131                 msg->pri_dev_type = pos;
 132                 pos += 8;
 133                 msg->num_sec_dev_types = *pos++;
 134                 if (msg->num_sec_dev_types * 8 > data + len - pos) {
 135                         wpa_printf(MSG_DEBUG, "P2P: Device Info underflow");
 136                         return -1;
 137                 }
 138                 pos += msg->num_sec_dev_types * 8;
 139                 if (data + len - pos < 4) {
 140                         wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
 141                                    "length %d", (int) (data + len - pos));
 142                         return -1;
 143                 }
 144                 if (WPA_GET_BE16(pos) != ATTR_DEV_NAME) {
 145                         wpa_hexdump(MSG_DEBUG, "P2P: Unexpected Device Name "
 146                                     "header", pos, 4);
 147                         return -1;
 148                 }
 149                 pos += 2;
 150                 nlen = WPA_GET_BE16(pos);
 151                 pos += 2;
 152                 if (data + len - pos < (int) nlen || nlen > 32) {
 153                         wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
 154                                    "length %d (buf len %d)", (int) nlen,
 155                                    (int) (data + len - pos));
 156                         return -1;
 157                 }
 158                 os_memcpy(msg->device_name, pos, nlen);
 159                 msg->device_name[nlen] = '\0';
 160                 for (i = 0; i < nlen; i++) {
 161                         if (msg->device_name[i] == '\0')
 162                                 break;
 163                         if (msg->device_name[i] > 0 &&
 164                             msg->device_name[i] < 32)
 165                                 msg->device_name[i] = '_';
 166                 }
 167                 wpa_printf(MSG_DEBUG, "P2P: * Device Info: addr " MACSTR
 168                            " primary device type %s device name '%s' "
 169                            "config methods 0x%x",
 170                            MAC2STR(msg->p2p_device_addr),
 171                            wps_dev_type_bin2str(msg->pri_dev_type, devtype,
 172                                                 sizeof(devtype)),
 173                            msg->device_name, msg->config_methods);
 174                 break;
 175         case P2P_ATTR_CONFIGURATION_TIMEOUT:
 176                 if (len < 2) {
 177                         wpa_printf(MSG_DEBUG, "P2P: Too short Configuration "
 178                                    "Timeout attribute (length %d)", len);
 179                         return -1;
 180                 }
 181                 msg->config_timeout = data;
 182                 wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout");
 183                 break;
 184         case P2P_ATTR_INTENDED_INTERFACE_ADDR:
 185                 if (len < ETH_ALEN) {
 186                         wpa_printf(MSG_DEBUG, "P2P: Too short Intended P2P "
 187                                    "Interface Address attribute (length %d)",
 188                                    len);
 189                         return -1;
 190                 }
 191                 msg->intended_addr = data;
 192                 wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address: "
 193                            MACSTR, MAC2STR(msg->intended_addr));
 194                 break;
 195         case P2P_ATTR_GROUP_BSSID:
 196                 if (len < ETH_ALEN) {
 197                         wpa_printf(MSG_DEBUG, "P2P: Too short P2P Group BSSID "
 198                                    "attribute (length %d)", len);
 199                         return -1;
 200                 }
 201                 msg->group_bssid = data;
 202                 wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID: " MACSTR,
 203                            MAC2STR(msg->group_bssid));
 204                 break;
 205         case P2P_ATTR_GROUP_ID:
 206                 if (len < ETH_ALEN || len > ETH_ALEN + 32) {
 207                         wpa_printf(MSG_DEBUG, "P2P: Invalid P2P Group ID "
 208                                    "attribute length %d", len);
 209                         return -1;
 210                 }
 211                 msg->group_id = data;
 212                 msg->group_id_len = len;
 213                 wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID: Device Address "
 214                            MACSTR, MAC2STR(msg->group_id));
 215                 wpa_hexdump_ascii(MSG_DEBUG, "P2P: * P2P Group ID: SSID",
 216                                   msg->group_id + ETH_ALEN,
 217                                   msg->group_id_len - ETH_ALEN);
 218                 break;
 219         case P2P_ATTR_INVITATION_FLAGS:
 220                 if (len < 1) {
 221                         wpa_printf(MSG_DEBUG, "P2P: Too short Invitation "
 222                                    "Flag attribute (length %d)", len);
 223                         return -1;
 224                 }
 225                 msg->invitation_flags = data;
 226                 wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x",
 227                            data[0]);
 228                 break;
 229         case P2P_ATTR_MANAGEABILITY:
 230                 if (len < 1) {
 231                         wpa_printf(MSG_DEBUG, "P2P: Too short Manageability "
 232                                    "attribute (length %d)", len);
 233                         return -1;
 234                 }
 235                 msg->manageability = data;
 236                 wpa_printf(MSG_DEBUG, "P2P: * Manageability: bitmap 0x%x",
 237                            data[0]);
 238                 break;
 239         case P2P_ATTR_NOTICE_OF_ABSENCE:
 240                 if (len < 2) {
 241                         wpa_printf(MSG_DEBUG, "P2P: Too short Notice of "
 242                                    "Absence attribute (length %d)", len);
 243                         return -1;
 244                 }
 245                 msg->noa = data;
 246                 msg->noa_len = len;
 247                 wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
 248                 break;
 249         case P2P_ATTR_EXT_LISTEN_TIMING:
 250                 if (len < 4) {
 251                         wpa_printf(MSG_DEBUG, "P2P: Too short Extended Listen "
 252                                    "Timing attribute (length %d)", len);
 253                         return -1;
 254                 }
 255                 msg->ext_listen_timing = data;
 256                 wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing "
 257                            "(period %u msec  interval %u msec)",
 258                            WPA_GET_LE16(msg->ext_listen_timing),
 259                            WPA_GET_LE16(msg->ext_listen_timing + 2));
 260                 break;
 261         case P2P_ATTR_MINOR_REASON_CODE:
 262                 if (len < 1) {
 263                         wpa_printf(MSG_DEBUG, "P2P: Too short Minor Reason "
 264                                    "Code attribute (length %d)", len);
 265                         return -1;
 266                 }
 267                 msg->minor_reason_code = data;
 268                 wpa_printf(MSG_DEBUG, "P2P: * Minor Reason Code: %u",
 269                            *msg->minor_reason_code);
 270                 break;
 271         default:
 272                 wpa_printf(MSG_DEBUG, "P2P: Skipped unknown attribute %d "
 273                            "(length %d)", id, len);
 274                 break;
 275         }
 276
 277         return 0;
 278 }
 279
 280
 281 /**
 282  * p2p_parse_p2p_ie - Parse P2P IE
 283  * @buf: Concatenated P2P IE(s) payload
 284  * @msg: Buffer for returning parsed attributes
 285  * Returns: 0 on success, -1 on failure
 286  *
 287  * Note: Caller is responsible for clearing the msg data structure before
 288  * calling this function.
 289  */
 290 int p2p_parse_p2p_ie(const struct wpabuf *buf, struct p2p_message *msg)
 291 {
 292         const u8 *pos = wpabuf_head_u8(buf);
 293         const u8 *end = pos + wpabuf_len(buf);
 294
 295         wpa_printf(MSG_DEBUG, "P2P: Parsing P2P IE");
 296
 297         while (pos < end) {
 298                 u16 attr_len;
 299                 if (pos + 2 >= end) {
 300                         wpa_printf(MSG_DEBUG, "P2P: Invalid P2P attribute");
 301                         return -1;
 302                 }
 303                 attr_len = WPA_GET_LE16(pos + 1);
 304                 wpa_printf(MSG_DEBUG, "P2P: Attribute %d length %u",
 305                            pos[0], attr_len);
 306                 if (pos + 3 + attr_len > end) {
 307                         wpa_printf(MSG_DEBUG, "P2P: Attribute underflow "
 308                                    "(len=%u left=%d)",
 309                                    attr_len, (int) (end - pos - 3));
 310                         wpa_hexdump(MSG_MSGDUMP, "P2P: Data", pos, end - pos);
 311                         return -1;
 312                 }
 313                 if (p2p_parse_attribute(pos[0], pos + 3, attr_len, msg))
 314                         return -1;
 315                 pos += 3 + attr_len;
 316         }
 317
 318         return 0;
 319 }
 320
 321
 322 static int p2p_parse_wps_ie(const struct wpabuf *buf, struct p2p_message *msg)
 323 {
 324         struct wps_parse_attr attr;
 325         int i;
 326
 327         wpa_printf(MSG_DEBUG, "P2P: Parsing WPS IE");
 328         if (wps_parse_msg(buf, &attr))
 329                 return -1;
 330         if (attr.dev_name && attr.dev_name_len < sizeof(msg->device_name) &&
 331             !msg->device_name[0])
 332                 os_memcpy(msg->device_name, attr.dev_name, attr.dev_name_len);
 333         if (attr.config_methods) {
 334                 msg->wps_config_methods =
 335                         WPA_GET_BE16(attr.config_methods);
 336                 wpa_printf(MSG_DEBUG, "P2P: Config Methods (WPS): 0x%x",
 337                            msg->wps_config_methods);
 338         }
 339         if (attr.dev_password_id) {
 340                 msg->dev_password_id = WPA_GET_BE16(attr.dev_password_id);
 341                 wpa_printf(MSG_DEBUG, "P2P: Device Password ID: %d",
 342                            msg->dev_password_id);
 343         }
 344         if (attr.primary_dev_type) {
 345                 char devtype[WPS_DEV_TYPE_BUFSIZE];
 346                 msg->wps_pri_dev_type = attr.primary_dev_type;
 347                 wpa_printf(MSG_DEBUG, "P2P: Primary Device Type (WPS): %s",
 348                            wps_dev_type_bin2str(msg->wps_pri_dev_type, devtype,
 349                                                 sizeof(devtype)));
 350         }
 351         if (attr.sec_dev_type_list) {
 352                 msg->wps_sec_dev_type_list = attr.sec_dev_type_list;
 353                 msg->wps_sec_dev_type_list_len = attr.sec_dev_type_list_len;
 354         }
 355
 356         for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
 357                 msg->wps_vendor_ext[i] = attr.vendor_ext[i];
 358                 msg->wps_vendor_ext_len[i] = attr.vendor_ext_len[i];
 359         }
 360
 361         msg->manufacturer = attr.manufacturer;
 362         msg->manufacturer_len = attr.manufacturer_len;
 363         msg->model_name = attr.model_name;
 364         msg->model_name_len = attr.model_name_len;
 365         msg->model_number = attr.model_number;
 366         msg->model_number_len = attr.model_number_len;
 367         msg->serial_number = attr.serial_number;
 368         msg->serial_number_len = attr.serial_number_len;
 369
 370         return 0;
 371 }
 372
 373
 374 /**
 375  * p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE)
 376  * @data: IEs from the message
 377  * @len: Length of data buffer in octets
 378  * @msg: Buffer for returning parsed attributes
 379  * Returns: 0 on success, -1 on failure
 380  *
 381  * Note: Caller is responsible for clearing the msg data structure before
 382  * calling this function.
 383  *
 384  * Note: Caller must free temporary memory allocations by calling
 385  * p2p_parse_free() when the parsed data is not needed anymore.
 386  */
 387 int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg)
 388 {
 389         struct ieee802_11_elems elems;
 390
 391         ieee802_11_parse_elems(data, len, &elems, 0);
 392         if (elems.ds_params && elems.ds_params_len >= 1)
 393                 msg->ds_params = elems.ds_params;
 394         if (elems.ssid)
 395                 msg->ssid = elems.ssid - 2;
 396
 397         msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len,
 398                                                           WPS_DEV_OUI_WFA);
 399         if (msg->wps_attributes &&
 400             p2p_parse_wps_ie(msg->wps_attributes, msg)) {
 401                 p2p_parse_free(msg);
 402                 return -1;
 403         }
 404
 405         msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len,
 406                                                           P2P_IE_VENDOR_TYPE);
 407         if (msg->p2p_attributes &&
 408             p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
 409                 wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
 410                 if (msg->p2p_attributes)
 411                         wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
 412                                         msg->p2p_attributes);
 413                 p2p_parse_free(msg);
 414                 return -1;
 415         }
 416
 417 #ifdef CONFIG_WIFI_DISPLAY
 418         if (elems.wfd) {
 419                 msg->wfd_subelems = ieee802_11_vendor_ie_concat(
 420                         data, len, WFD_IE_VENDOR_TYPE);
 421         }
 422 #endif /* CONFIG_WIFI_DISPLAY */
 423
 424         return 0;
 425 }
 426
 427
 428 /**
 429  * p2p_parse - Parse a P2P Action frame contents
 430  * @data: Action frame payload after Category and Code fields
 431  * @len: Length of data buffer in octets
 432  * @msg: Buffer for returning parsed attributes
 433  * Returns: 0 on success, -1 on failure
 434  *
 435  * Note: Caller must free temporary memory allocations by calling
 436  * p2p_parse_free() when the parsed data is not needed anymore.
 437  */
 438 int p2p_parse(const u8 *data, size_t len, struct p2p_message *msg)
 439 {
 440         os_memset(msg, 0, sizeof(*msg));
 441         wpa_printf(MSG_DEBUG, "P2P: Parsing the received message");
 442         if (len < 1) {
 443                 wpa_printf(MSG_DEBUG, "P2P: No Dialog Token in the message");
 444                 return -1;
 445         }
 446         msg->dialog_token = data[0];
 447         wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", msg->dialog_token);
 448
 449         return p2p_parse_ies(data + 1, len - 1, msg);
 450 }
 451
 452
 453 /**
 454  * p2p_parse_free - Free temporary data from P2P parsing
 455  * @msg: Parsed attributes
 456  */
 457 void p2p_parse_free(struct p2p_message *msg)
 458 {
 459         wpabuf_free(msg->p2p_attributes);
 460         msg->p2p_attributes = NULL;
 461         wpabuf_free(msg->wps_attributes);
 462         msg->wps_attributes = NULL;
 463 #ifdef CONFIG_WIFI_DISPLAY
 464         wpabuf_free(msg->wfd_subelems);
 465         msg->wfd_subelems = NULL;
 466 #endif /* CONFIG_WIFI_DISPLAY */
 467 }
 468
 469
 470 int p2p_group_info_parse(const u8 *gi, size_t gi_len,
 471                          struct p2p_group_info *info)
 472 {
 473         const u8 *g, *gend;
 474
 475         os_memset(info, 0, sizeof(*info));
 476         if (gi == NULL)
 477                 return 0;
 478
 479         g = gi;
 480         gend = gi + gi_len;
 481         while (g < gend) {
 482                 struct p2p_client_info *cli;
 483                 const u8 *t, *cend;
 484                 int count;
 485
 486                 cli = &info->client[info->num_clients];
 487                 cend = g + 1 + g[0];
 488                 if (cend > gend)
 489                         return -1; /* invalid data */
 490                 /* g at start of P2P Client Info Descriptor */
 491                 /* t at Device Capability Bitmap */
 492                 t = g + 1 + 2 * ETH_ALEN;
 493                 if (t > cend)
 494                         return -1; /* invalid data */
 495                 cli->p2p_device_addr = g + 1;
 496                 cli->p2p_interface_addr = g + 1 + ETH_ALEN;
 497                 cli->dev_capab = t[0];
 498
 499                 if (t + 1 + 2 + 8 + 1 > cend)
 500                         return -1; /* invalid data */
 501
 502                 cli->config_methods = WPA_GET_BE16(&t[1]);
 503                 cli->pri_dev_type = &t[3];
 504
 505                 t += 1 + 2 + 8;
 506                 /* t at Number of Secondary Device Types */
 507                 cli->num_sec_dev_types = *t++;
 508                 if (t + 8 * cli->num_sec_dev_types > cend)
 509                         return -1; /* invalid data */
 510                 cli->sec_dev_types = t;
 511                 t += 8 * cli->num_sec_dev_types;
 512
 513                 /* t at Device Name in WPS TLV format */
 514                 if (t + 2 + 2 > cend)
 515                         return -1; /* invalid data */
 516                 if (WPA_GET_BE16(t) != ATTR_DEV_NAME)
 517                         return -1; /* invalid Device Name TLV */
 518                 t += 2;
 519                 count = WPA_GET_BE16(t);
 520                 t += 2;
 521                 if (count > cend - t)
 522                         return -1; /* invalid Device Name TLV */
 523                 if (count >= 32)
 524                         count = 32;
 525                 cli->dev_name = (const char *) t;
 526                 cli->dev_name_len = count;
 527
 528                 g = cend;
 529
 530                 info->num_clients++;
 531                 if (info->num_clients == P2P_MAX_GROUP_ENTRIES)
 532                         return -1;
 533         }
 534
 535         return 0;
 536 }
 537
 538
 539 static int p2p_group_info_text(const u8 *gi, size_t gi_len, char *buf,
 540                                char *end)
 541 {
 542         char *pos = buf;
 543         int ret;
 544         struct p2p_group_info info;
 545         unsigned int i;
 546
 547         if (p2p_group_info_parse(gi, gi_len, &info) < 0)
 548                 return 0;
 549
 550         for (i = 0; i < info.num_clients; i++) {
 551                 struct p2p_client_info *cli;
 552                 char name[33];
 553                 char devtype[WPS_DEV_TYPE_BUFSIZE];
 554                 u8 s;
 555                 int count;
 556
 557                 cli = &info.client[i];
 558                 ret = os_snprintf(pos, end - pos, "p2p_group_client: "
 559                                   "dev=" MACSTR " iface=" MACSTR,
 560                                   MAC2STR(cli->p2p_device_addr),
 561                                   MAC2STR(cli->p2p_interface_addr));
 562                 if (ret < 0 || ret >= end - pos)
 563                         return pos - buf;
 564                 pos += ret;
 565
 566                 ret = os_snprintf(pos, end - pos,
 567                                   " dev_capab=0x%x config_methods=0x%x "
 568                                   "dev_type=%s",
 569                                   cli->dev_capab, cli->config_methods,
 570                                   wps_dev_type_bin2str(cli->pri_dev_type,
 571                                                        devtype,
 572                                                        sizeof(devtype)));
 573                 if (ret < 0 || ret >= end - pos)
 574                         return pos - buf;
 575                 pos += ret;
 576
 577                 for (s = 0; s < cli->num_sec_dev_types; s++) {
 578                         ret = os_snprintf(pos, end - pos, " dev_type=%s",
 579                                           wps_dev_type_bin2str(
 580                                                   &cli->sec_dev_types[s * 8],
 581                                                   devtype, sizeof(devtype)));
 582                         if (ret < 0 || ret >= end - pos)
 583                                 return pos - buf;
 584                         pos += ret;
 585                 }
 586
 587                 os_memcpy(name, cli->dev_name, cli->dev_name_len);
 588                 name[cli->dev_name_len] = '\0';
 589                 count = (int) cli->dev_name_len - 1;
 590                 while (count >= 0) {
 591                         if (name[count] > 0 && name[count] < 32)
 592                                 name[count] = '_';
 593                         count--;
 594                 }
 595
 596                 ret = os_snprintf(pos, end - pos, " dev_name='%s'\n", name);
 597                 if (ret < 0 || ret >= end - pos)
 598                         return pos - buf;
 599                 pos += ret;
 600         }
 601
 602         return pos - buf;
 603 }
 604
 605
 606 /**
 607  * p2p_attr_text - Build text format description of P2P IE attributes
 608  * @data: P2P IE contents
 609  * @buf: Buffer for returning text
 610  * @end: Pointer to the end of the buf area
 611  * Returns: Number of octets written to the buffer or -1 on faikure
 612  *
 613  * This function can be used to parse P2P IE contents into text format
 614  * field=value lines.
 615  */
 616 int p2p_attr_text(struct wpabuf *data, char *buf, char *end)
 617 {
 618         struct p2p_message msg;
 619         char *pos = buf;
 620         int ret;
 621
 622         os_memset(&msg, 0, sizeof(msg));
 623         if (p2p_parse_p2p_ie(data, &msg))
 624                 return -1;
 625
 626         if (msg.capability) {
 627                 ret = os_snprintf(pos, end - pos,
 628                                   "p2p_dev_capab=0x%x\n"
 629                                   "p2p_group_capab=0x%x\n",
 630                                   msg.capability[0], msg.capability[1]);
 631                 if (ret < 0 || ret >= end - pos)
 632                         return pos - buf;
 633                 pos += ret;
 634         }
 635
 636         if (msg.pri_dev_type) {
 637                 char devtype[WPS_DEV_TYPE_BUFSIZE];
 638                 ret = os_snprintf(pos, end - pos,
 639                                   "p2p_primary_device_type=%s\n",
 640                                   wps_dev_type_bin2str(msg.pri_dev_type,
 641                                                        devtype,
 642                                                        sizeof(devtype)));
 643                 if (ret < 0 || ret >= end - pos)
 644                         return pos - buf;
 645                 pos += ret;
 646         }
 647
 648         ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n",
 649                           msg.device_name);
 650         if (ret < 0 || ret >= end - pos)
 651                 return pos - buf;
 652         pos += ret;
 653
 654         if (msg.p2p_device_addr) {
 655                 ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR
 656                                   "\n",
 657                                   MAC2STR(msg.p2p_device_addr));
 658                 if (ret < 0 || ret >= end - pos)
 659                         return pos - buf;
 660                 pos += ret;
 661         }
 662
 663         ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n",
 664                           msg.config_methods);
 665         if (ret < 0 || ret >= end - pos)
 666                 return pos - buf;
 667         pos += ret;
 668
 669         ret = p2p_group_info_text(msg.group_info, msg.group_info_len,
 670                                   pos, end);
 671         if (ret < 0)
 672                 return pos - buf;
 673         pos += ret;
 674
 675         return pos - buf;
 676 }
 677
 678
 679 int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie)
 680 {
 681         struct p2p_message msg;
 682
 683         os_memset(&msg, 0, sizeof(msg));
 684         if (p2p_parse_p2p_ie(p2p_ie, &msg))
 685                 return 0;
 686
 687         if (!msg.manageability)
 688                 return 0;
 689
 690         return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTION_PERMITTED);
 691 }
 692
 693
 694 u8 p2p_get_group_capab(const struct wpabuf *p2p_ie)
 695 {
 696         struct p2p_message msg;
 697
 698         os_memset(&msg, 0, sizeof(msg));
 699         if (p2p_parse_p2p_ie(p2p_ie, &msg))
 700                 return 0;
 701
 702         if (!msg.capability)
 703                 return 0;
 704
 705         return msg.capability[1];
 706 }
 707
 708
 709 const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie)
 710 {
 711         struct p2p_message msg;
 712
 713         os_memset(&msg, 0, sizeof(msg));
 714         if (p2p_parse_p2p_ie(p2p_ie, &msg))
 715                 return NULL;
 716
 717         if (msg.p2p_device_addr)
 718                 return msg.p2p_device_addr;
 719         if (msg.device_id)
 720                 return msg.device_id;
 721
 722         return NULL;
 723 }