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 case P2P_ATTR_OOB_GO_NEG_CHANNEL: 272 if (len < 6) { 273 wpa_printf(MSG_DEBUG, "P2P: Too short OOB GO Neg " 274 "Channel attribute (length %d)", len); 275 return -1; 276 } 277 msg->oob_go_neg_channel = data; 278 wpa_printf(MSG_DEBUG, "P2P: * OOB GO Neg Channel: " 279 "Country %c%c(0x%02x) Operating Class %d " 280 "Channel Number %d Role %d", 281 data[0], data[1], data[2], data[3], data[4], 282 data[5]); 283 break; 284 default: 285 wpa_printf(MSG_DEBUG, "P2P: Skipped unknown attribute %d " 286 "(length %d)", id, len); 287 break; 288 } 289 290 return 0; 291 } 292 293 294 /** 295 * p2p_parse_p2p_ie - Parse P2P IE 296 * @buf: Concatenated P2P IE(s) payload 297 * @msg: Buffer for returning parsed attributes 298 * Returns: 0 on success, -1 on failure 299 * 300 * Note: Caller is responsible for clearing the msg data structure before 301 * calling this function. 302 */ 303 int p2p_parse_p2p_ie(const struct wpabuf *buf, struct p2p_message *msg) 304 { 305 const u8 *pos = wpabuf_head_u8(buf); 306 const u8 *end = pos + wpabuf_len(buf); 307 308 wpa_printf(MSG_DEBUG, "P2P: Parsing P2P IE"); 309 310 while (pos < end) { 311 u16 attr_len; 312 if (pos + 2 >= end) { 313 wpa_printf(MSG_DEBUG, "P2P: Invalid P2P attribute"); 314 return -1; 315 } 316 attr_len = WPA_GET_LE16(pos + 1); 317 wpa_printf(MSG_DEBUG, "P2P: Attribute %d length %u", 318 pos[0], attr_len); 319 if (pos + 3 + attr_len > end) { 320 wpa_printf(MSG_DEBUG, "P2P: Attribute underflow " 321 "(len=%u left=%d)", 322 attr_len, (int) (end - pos - 3)); 323 wpa_hexdump(MSG_MSGDUMP, "P2P: Data", pos, end - pos); 324 return -1; 325 } 326 if (p2p_parse_attribute(pos[0], pos + 3, attr_len, msg)) 327 return -1; 328 pos += 3 + attr_len; 329 } 330 331 return 0; 332 } 333 334 335 static int p2p_parse_wps_ie(const struct wpabuf *buf, struct p2p_message *msg) 336 { 337 struct wps_parse_attr attr; 338 int i; 339 340 wpa_printf(MSG_DEBUG, "P2P: Parsing WPS IE"); 341 if (wps_parse_msg(buf, &attr)) 342 return -1; 343 if (attr.dev_name && attr.dev_name_len < sizeof(msg->device_name) && 344 !msg->device_name[0]) 345 os_memcpy(msg->device_name, attr.dev_name, attr.dev_name_len); 346 if (attr.config_methods) { 347 msg->wps_config_methods = 348 WPA_GET_BE16(attr.config_methods); 349 wpa_printf(MSG_DEBUG, "P2P: Config Methods (WPS): 0x%x", 350 msg->wps_config_methods); 351 } 352 if (attr.dev_password_id) { 353 msg->dev_password_id = WPA_GET_BE16(attr.dev_password_id); 354 wpa_printf(MSG_DEBUG, "P2P: Device Password ID: %d", 355 msg->dev_password_id); 356 msg->dev_password_id_present = 1; 357 } 358 if (attr.primary_dev_type) { 359 char devtype[WPS_DEV_TYPE_BUFSIZE]; 360 msg->wps_pri_dev_type = attr.primary_dev_type; 361 wpa_printf(MSG_DEBUG, "P2P: Primary Device Type (WPS): %s", 362 wps_dev_type_bin2str(msg->wps_pri_dev_type, devtype, 363 sizeof(devtype))); 364 } 365 if (attr.sec_dev_type_list) { 366 msg->wps_sec_dev_type_list = attr.sec_dev_type_list; 367 msg->wps_sec_dev_type_list_len = attr.sec_dev_type_list_len; 368 } 369 370 for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) { 371 msg->wps_vendor_ext[i] = attr.vendor_ext[i]; 372 msg->wps_vendor_ext_len[i] = attr.vendor_ext_len[i]; 373 } 374 375 msg->manufacturer = attr.manufacturer; 376 msg->manufacturer_len = attr.manufacturer_len; 377 msg->model_name = attr.model_name; 378 msg->model_name_len = attr.model_name_len; 379 msg->model_number = attr.model_number; 380 msg->model_number_len = attr.model_number_len; 381 msg->serial_number = attr.serial_number; 382 msg->serial_number_len = attr.serial_number_len; 383 384 msg->oob_dev_password = attr.oob_dev_password; 385 msg->oob_dev_password_len = attr.oob_dev_password_len; 386 387 return 0; 388 } 389 390 391 /** 392 * p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE) 393 * @data: IEs from the message 394 * @len: Length of data buffer in octets 395 * @msg: Buffer for returning parsed attributes 396 * Returns: 0 on success, -1 on failure 397 * 398 * Note: Caller is responsible for clearing the msg data structure before 399 * calling this function. 400 * 401 * Note: Caller must free temporary memory allocations by calling 402 * p2p_parse_free() when the parsed data is not needed anymore. 403 */ 404 int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg) 405 { 406 struct ieee802_11_elems elems; 407 408 ieee802_11_parse_elems(data, len, &elems, 0); 409 if (elems.ds_params && elems.ds_params_len >= 1) 410 msg->ds_params = elems.ds_params; 411 if (elems.ssid) 412 msg->ssid = elems.ssid - 2; 413 414 msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len, 415 WPS_DEV_OUI_WFA); 416 if (msg->wps_attributes && 417 p2p_parse_wps_ie(msg->wps_attributes, msg)) { 418 p2p_parse_free(msg); 419 return -1; 420 } 421 422 msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len, 423 P2P_IE_VENDOR_TYPE); 424 if (msg->p2p_attributes && 425 p2p_parse_p2p_ie(msg->p2p_attributes, msg)) { 426 wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data"); 427 if (msg->p2p_attributes) 428 wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data", 429 msg->p2p_attributes); 430 p2p_parse_free(msg); 431 return -1; 432 } 433 434 #ifdef CONFIG_WIFI_DISPLAY 435 if (elems.wfd) { 436 msg->wfd_subelems = ieee802_11_vendor_ie_concat( 437 data, len, WFD_IE_VENDOR_TYPE); 438 } 439 #endif /* CONFIG_WIFI_DISPLAY */ 440 441 return 0; 442 } 443 444 445 /** 446 * p2p_parse - Parse a P2P Action frame contents 447 * @data: Action frame payload after Category and Code fields 448 * @len: Length of data buffer in octets 449 * @msg: Buffer for returning parsed attributes 450 * Returns: 0 on success, -1 on failure 451 * 452 * Note: Caller must free temporary memory allocations by calling 453 * p2p_parse_free() when the parsed data is not needed anymore. 454 */ 455 int p2p_parse(const u8 *data, size_t len, struct p2p_message *msg) 456 { 457 os_memset(msg, 0, sizeof(*msg)); 458 wpa_printf(MSG_DEBUG, "P2P: Parsing the received message"); 459 if (len < 1) { 460 wpa_printf(MSG_DEBUG, "P2P: No Dialog Token in the message"); 461 return -1; 462 } 463 msg->dialog_token = data[0]; 464 wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", msg->dialog_token); 465 466 return p2p_parse_ies(data + 1, len - 1, msg); 467 } 468 469 470 int p2p_parse_ies_separate(const u8 *wsc, size_t wsc_len, const u8 *p2p, 471 size_t p2p_len, struct p2p_message *msg) 472 { 473 os_memset(msg, 0, sizeof(*msg)); 474 475 msg->wps_attributes = wpabuf_alloc_copy(wsc, wsc_len); 476 if (msg->wps_attributes && 477 p2p_parse_wps_ie(msg->wps_attributes, msg)) { 478 p2p_parse_free(msg); 479 return -1; 480 } 481 482 msg->p2p_attributes = wpabuf_alloc_copy(p2p, p2p_len); 483 if (msg->p2p_attributes && 484 p2p_parse_p2p_ie(msg->p2p_attributes, msg)) { 485 wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data"); 486 if (msg->p2p_attributes) 487 wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data", 488 msg->p2p_attributes); 489 p2p_parse_free(msg); 490 return -1; 491 } 492 493 return 0; 494 } 495 496 497 /** 498 * p2p_parse_free - Free temporary data from P2P parsing 499 * @msg: Parsed attributes 500 */ 501 void p2p_parse_free(struct p2p_message *msg) 502 { 503 wpabuf_free(msg->p2p_attributes); 504 msg->p2p_attributes = NULL; 505 wpabuf_free(msg->wps_attributes); 506 msg->wps_attributes = NULL; 507 #ifdef CONFIG_WIFI_DISPLAY 508 wpabuf_free(msg->wfd_subelems); 509 msg->wfd_subelems = NULL; 510 #endif /* CONFIG_WIFI_DISPLAY */ 511 } 512 513 514 int p2p_group_info_parse(const u8 *gi, size_t gi_len, 515 struct p2p_group_info *info) 516 { 517 const u8 *g, *gend; 518 519 os_memset(info, 0, sizeof(*info)); 520 if (gi == NULL) 521 return 0; 522 523 g = gi; 524 gend = gi + gi_len; 525 while (g < gend) { 526 struct p2p_client_info *cli; 527 const u8 *t, *cend; 528 int count; 529 530 cli = &info->client[info->num_clients]; 531 cend = g + 1 + g[0]; 532 if (cend > gend) 533 return -1; /* invalid data */ 534 /* g at start of P2P Client Info Descriptor */ 535 /* t at Device Capability Bitmap */ 536 t = g + 1 + 2 * ETH_ALEN; 537 if (t > cend) 538 return -1; /* invalid data */ 539 cli->p2p_device_addr = g + 1; 540 cli->p2p_interface_addr = g + 1 + ETH_ALEN; 541 cli->dev_capab = t[0]; 542 543 if (t + 1 + 2 + 8 + 1 > cend) 544 return -1; /* invalid data */ 545 546 cli->config_methods = WPA_GET_BE16(&t[1]); 547 cli->pri_dev_type = &t[3]; 548 549 t += 1 + 2 + 8; 550 /* t at Number of Secondary Device Types */ 551 cli->num_sec_dev_types = *t++; 552 if (t + 8 * cli->num_sec_dev_types > cend) 553 return -1; /* invalid data */ 554 cli->sec_dev_types = t; 555 t += 8 * cli->num_sec_dev_types; 556 557 /* t at Device Name in WPS TLV format */ 558 if (t + 2 + 2 > cend) 559 return -1; /* invalid data */ 560 if (WPA_GET_BE16(t) != ATTR_DEV_NAME) 561 return -1; /* invalid Device Name TLV */ 562 t += 2; 563 count = WPA_GET_BE16(t); 564 t += 2; 565 if (count > cend - t) 566 return -1; /* invalid Device Name TLV */ 567 if (count >= 32) 568 count = 32; 569 cli->dev_name = (const char *) t; 570 cli->dev_name_len = count; 571 572 g = cend; 573 574 info->num_clients++; 575 if (info->num_clients == P2P_MAX_GROUP_ENTRIES) 576 return -1; 577 } 578 579 return 0; 580 } 581 582 583 static int p2p_group_info_text(const u8 *gi, size_t gi_len, char *buf, 584 char *end) 585 { 586 char *pos = buf; 587 int ret; 588 struct p2p_group_info info; 589 unsigned int i; 590 591 if (p2p_group_info_parse(gi, gi_len, &info) < 0) 592 return 0; 593 594 for (i = 0; i < info.num_clients; i++) { 595 struct p2p_client_info *cli; 596 char name[33]; 597 char devtype[WPS_DEV_TYPE_BUFSIZE]; 598 u8 s; 599 int count; 600 601 cli = &info.client[i]; 602 ret = os_snprintf(pos, end - pos, "p2p_group_client: " 603 "dev=" MACSTR " iface=" MACSTR, 604 MAC2STR(cli->p2p_device_addr), 605 MAC2STR(cli->p2p_interface_addr)); 606 if (ret < 0 || ret >= end - pos) 607 return pos - buf; 608 pos += ret; 609 610 ret = os_snprintf(pos, end - pos, 611 " dev_capab=0x%x config_methods=0x%x " 612 "dev_type=%s", 613 cli->dev_capab, cli->config_methods, 614 wps_dev_type_bin2str(cli->pri_dev_type, 615 devtype, 616 sizeof(devtype))); 617 if (ret < 0 || ret >= end - pos) 618 return pos - buf; 619 pos += ret; 620 621 for (s = 0; s < cli->num_sec_dev_types; s++) { 622 ret = os_snprintf(pos, end - pos, " dev_type=%s", 623 wps_dev_type_bin2str( 624 &cli->sec_dev_types[s * 8], 625 devtype, sizeof(devtype))); 626 if (ret < 0 || ret >= end - pos) 627 return pos - buf; 628 pos += ret; 629 } 630 631 os_memcpy(name, cli->dev_name, cli->dev_name_len); 632 name[cli->dev_name_len] = '\0'; 633 count = (int) cli->dev_name_len - 1; 634 while (count >= 0) { 635 if (name[count] > 0 && name[count] < 32) 636 name[count] = '_'; 637 count--; 638 } 639 640 ret = os_snprintf(pos, end - pos, " dev_name='%s'\n", name); 641 if (ret < 0 || ret >= end - pos) 642 return pos - buf; 643 pos += ret; 644 } 645 646 return pos - buf; 647 } 648 649 650 /** 651 * p2p_attr_text - Build text format description of P2P IE attributes 652 * @data: P2P IE contents 653 * @buf: Buffer for returning text 654 * @end: Pointer to the end of the buf area 655 * Returns: Number of octets written to the buffer or -1 on faikure 656 * 657 * This function can be used to parse P2P IE contents into text format 658 * field=value lines. 659 */ 660 int p2p_attr_text(struct wpabuf *data, char *buf, char *end) 661 { 662 struct p2p_message msg; 663 char *pos = buf; 664 int ret; 665 666 os_memset(&msg, 0, sizeof(msg)); 667 if (p2p_parse_p2p_ie(data, &msg)) 668 return -1; 669 670 if (msg.capability) { 671 ret = os_snprintf(pos, end - pos, 672 "p2p_dev_capab=0x%x\n" 673 "p2p_group_capab=0x%x\n", 674 msg.capability[0], msg.capability[1]); 675 if (ret < 0 || ret >= end - pos) 676 return pos - buf; 677 pos += ret; 678 } 679 680 if (msg.pri_dev_type) { 681 char devtype[WPS_DEV_TYPE_BUFSIZE]; 682 ret = os_snprintf(pos, end - pos, 683 "p2p_primary_device_type=%s\n", 684 wps_dev_type_bin2str(msg.pri_dev_type, 685 devtype, 686 sizeof(devtype))); 687 if (ret < 0 || ret >= end - pos) 688 return pos - buf; 689 pos += ret; 690 } 691 692 ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n", 693 msg.device_name); 694 if (ret < 0 || ret >= end - pos) 695 return pos - buf; 696 pos += ret; 697 698 if (msg.p2p_device_addr) { 699 ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR 700 "\n", 701 MAC2STR(msg.p2p_device_addr)); 702 if (ret < 0 || ret >= end - pos) 703 return pos - buf; 704 pos += ret; 705 } 706 707 ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n", 708 msg.config_methods); 709 if (ret < 0 || ret >= end - pos) 710 return pos - buf; 711 pos += ret; 712 713 ret = p2p_group_info_text(msg.group_info, msg.group_info_len, 714 pos, end); 715 if (ret < 0) 716 return pos - buf; 717 pos += ret; 718 719 return pos - buf; 720 } 721 722 723 int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie) 724 { 725 struct p2p_message msg; 726 727 os_memset(&msg, 0, sizeof(msg)); 728 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 729 return 0; 730 731 if (!msg.manageability) 732 return 0; 733 734 return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTION_PERMITTED); 735 } 736 737 738 u8 p2p_get_group_capab(const struct wpabuf *p2p_ie) 739 { 740 struct p2p_message msg; 741 742 os_memset(&msg, 0, sizeof(msg)); 743 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 744 return 0; 745 746 if (!msg.capability) 747 return 0; 748 749 return msg.capability[1]; 750 } 751 752 753 const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie) 754 { 755 struct p2p_message msg; 756 757 os_memset(&msg, 0, sizeof(msg)); 758 if (p2p_parse_p2p_ie(p2p_ie, &msg)) 759 return NULL; 760 761 if (msg.p2p_device_addr) 762 return msg.p2p_device_addr; 763 if (msg.device_id) 764 return msg.device_id; 765 766 return NULL; 767 } 768